The Best Pole Saws Tested in 2023. Chain saw attachment

US5669145A. Chainsaw attachment. Google Patents

Publication number US5669145A US5669145A US08/631,146 US63114696A US5669145A US 5669145 A US5669145 A US 5669145A US 63114696 A US63114696 A US 63114696A US 5669145 A US5669145 A US 5669145A Authority US United States Prior art keywords chain chain bar attachment prongs stop members Prior art date 1996-04-15 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired. Fee Related Application number US08/631,146 Inventor Harold O. Skripsky Original Assignee Skripsky; Harold O. Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 1996-04-15 Filing date 1996-04-15 Publication date 1997-09-23 1996-04-15 Application filed by Skripsky; Harold O. filed Critical Skripsky; Harold O. 1996-04-15 Priority to US08/631,146 priority Critical patent/US5669145A/en 1997-09-23 Application granted granted Critical 1997-09-23 Publication of US5669145A publication Critical patent/US5669145A/en 2016-04-15 Anticipated expiration legal-status Critical Status Expired. Fee Related legal-status Critical Current

Links

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• 239000000789 fastener Substances 0.000 claims 2
• 239000000463 material Substances 0.000 claims 2
• 210000003414 Extremities Anatomy 0.000 abstract description 26
• 230000037250 Clearance Effects 0.000 abstract description 6
• 230000035512 clearance Effects 0.000 abstract description 6
• 230000001276 controlling effect Effects 0.000 abstract description 4
• 238000009434 installation Methods 0.000 abstract description 4
• 230000004048 modification Effects 0.000 description 4
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• 230000002441 reversible Effects 0.000 description 4
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Images

Classifications

• B — PERFORMING OPERATIONS; TRANSPORTING
• B27 — WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
• B27B — SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
• B27B17/00 — Chain saws; Equipment therefor
• B27B17/0083 — Attachments for guiding or supporting chain saws during operation

Abstract

An attachment for chain saws that provides a pivot point for better cutting leverage and control especially when cutting small tree branches or limbs. The attachment is installed on both sides of the saw chain and has two or more angularly and outwardly extending prongs that pull the limbs into the chain so that they can be more easily cut. Spacers between the chain bar and the attachment provide for proper clearance for the chain and allow easy installation and removal of the attachment. The attachment also is reversibIe so that it can be used for creating a straight cut using a straight edge as a guide and for controlling the depth of a cut when cutting a kerf in timbers or logs.

Description

Chain saws are a common power tool designed mainly for the purpose of cutting large wooden objects such as trees and large limbs or timbers. Chain saws are powered by either a gasoline engine or an electric motor. In either case, chain saws are portable. Although chain saws are very effective when used to cut relatively large wooden objects, they are not so effective when used to cut small limbs, brush and hedges which are springy. When a chain saw is used to cut small limbs, brush and hedges, these items will often be pulled and kicked back away from the chain saw making it both difficult and dangerous to attempt to cut these small somewhat springy items. There have been developed and are known a number of attachments that attempt to solve some of these problems. Many are very specialized or restrictive in their uses. For example, the prior art teaches the use of prongs or stops that extend outwardly beyond the teeth of the chain saw and attempt to stop the small tree limb so that it can be more easily cut. Many of these prior art designs are not satisfactory and they do not work effectively because of the angle or proper spacing and clearance of the stop or prong, and as a result, many of the prior art attachments are somewhat difficult to install on and remove from the chain saw. over, many of the prior art attachments are positioned on the chain blade so as to interfere with other uses of the chain saw and therefore have to be removed when the chain saw is used for cutting small trees or larger limbs or for cutting groves in a wood beam.

There is therefore a need for an improved chain saw attachment that can be easily installed and removed but which can be left in place for most used of the chain saw. There is a further need for an improved attachment for chain saws which will assist in the cutting of kerfs in timbers or logs by controlling the depth of the cut and guiding the saw along a straight edged guide.

The attachment of the invention has two or three prongs that extend above and below the chain blade on both sides of the saw and also extend at an angle that will actually pull the small limbs into the chain. The prongs of the attachment are installed on both sides of the chain bar using spacers that provide for proper clearance for the chain and allow easy installation and removal of the attachment. The attachment also is reversible so that it can be used to control the depth of a cut or to follow a straight edged guide when cutting a kerf in timbers. The attachment of the invention also is useful when cutting through roofs or walls of a building structure.

FIG. 2 is an enlarged view of a portion of the chain saw bar with one-half of the attachment removed to show the details of the spacers;

FIG. 5 is a view illustrating that a chain saw using the attachment of the invention can still be used to cut larger timbers without removal of the attachment; and

Referring to FIG. 1, there is illustrated a chain saw 10 of any suitable type that has a handle 12 so that it can be grasped by the hands of the user, which handle 12 is attached to a housing 13 that contains the motor and drive for a chain 14 containing cutting teeth as is well known. The chain 14 travels around and is guided by the chain bar 16. The chain 14 travels away from the housing 12 along the top 18 of the chain bar 16 and then returns across the bottom 20 of the chain bar 16. Obviously, the chain 14 will cut anything it comes in contact with as it travels either across the top 18 or bottom 20 of the chain bar 16.

The problem to which the invention is directed is the fact that when the chain saw 10 is used to cut small limbs or branches or is used for pruning bushes, shrubs, etc., these smaller items tend to kick out away from the chain 14 without being cut. There is also a safety factor when cutting these smaller items since they can be kicked out and injure the user or any bystander. The attachment of the invention is indicated generally by the reference numeral 22 and consists of two identical stop members 24 and 26, stop member 24 being positioned on the left side of the chain bar 16 while stop member 26 is positioned on the right side. Each stop member 24 and 26 has a pair of outwardly extending prongs 28 that extend beyond the top 18 of the chain bar 16. Each prong 28 has an inner edge 30 that extends outwardly and rearwardly toward the direction of the housing 13, preferably at an angle of 20 to 30 degrees from the vertical or from a line perpendicular to the top 18 of the chain bar 16. The front edge 32 of each of the prongs 28 extends generally at the same angle as the rear edge 30, but as best seen in FIG. 2, the upper portion of the front edge 32 is curved and joins the rear edge 30 at the uppermost point of the prong 28.

Each stop member 24 and 26 also has a pair of prongs 34 that extend outwardly and downwardly from the bottom 20 of the chain bar 16. The rear edge 36 of each prong is at the same angle relative to the chain bar 16 as the front edges 32 of prongs 28. Similarly, the front edge 38 of each prong 34 is straight and is at the same angle relative to the chain bar 16 as the rear edges 30 of the prongs 28, that is, in the range of 20 to 30 degrees relative to a line perpendicular to the bosom 20 of the chain bar 16. Like the front edge 32 of each top prong 28, the rear edge 36 of each prong 34 is curved toward and joins the edge 38 at the outermost edge of the prong 34.

Each pair of upper prongs 28 and lower prongs 34 are joined to an adjacent pair by a connecting member 40. Preferably, a pair of upper prongs 28 and lower prongs 34 are formed integrally along with a connecting member 40 to form a stop member 24 or 26 as a single piece. When assembled on the chain saw 10, the right side stop member 26 and left side stop member 24 are positioned on opposite sides of the chain bar 16 so that the members 24 and 26 are aligned. The stop members 24 and 26 are then connected by suitable connecting members, such as bolts and nuts 42, that extend through corresponding openings in the stop members 24 and 26 and which extend through a pair of spaced apart openings 44 formed in the chain bar 16. If desired, a plurality of openings 44 can be formed along the longitudinal center line of the chain bar 16 so that the attachment 22 can be positioned in the desired position by selecting two of the openings 44.

To properly mount the stop members 24 and 26 of the attachment 22, it is necessary to provide spacers 46 on each side of the chain bar 16 so that the stop members 24 and 26 will be spaced from the chain 14 a sufficient amount to permit the chain 14 to pass freely between the side members 24 and 26. This is best illustrated in FIG. 3. There can be provided one spacer 46 for each pair of prongs 28 and 34, or if desired, a single spacer can be provided by forming a pair of spacers 46 of a sufficient length to span two of the mounting openings 44. In either event, it is evident that the attachment 22 of the invention can be quickly and easily mounted onto the chain saw 10 without the use of any special tools.

It will be evident to those skilled in the art that the invention provides a very useful attachment to improve the utility of the chain saw 10. When small limbs or tree branches are to be cut, they will be stopped and held in between one of the prongs 28 or 34, being forced downwardly toward the chain 14 by the angle of the prongs 28 and 34. By providing an attachment which has a stop member 24 and 26 on each side of the chain bar 16, the small limbs are positively caught and held and the danger is minimized of these being kicked out away from the chain 14. With the design of the attachment 22 of the invention, small limbs can be cut using either the top 18 or bottom 20 of the chain saw 10. The attachment 22 is preferably installed back from the front edge of the chain saw 10 a sufficient distance so that the chain saw can still be used to cut larger members without the necessity of removing the attachment 22. This is illustrated in FIGS. 5 and 6. Although it has been my experience that having two prongs extending from both the top and bottom of each stop member 24 and 26 provide for the most efficient use of the attachment 22, three or more prongs may be used for an attachment designed for larger chain saws, or there may be used two pairs of the stop members 24 and 26 each stop member having two upper and two lower prongs. There is, however, a minimum space that should be provided between each pair of prongs 28 and each pair of prongs 34.

FIG. 4 illustrates the use of the attachment of the invention for cutting kerfs in logs or timbers. In this instance, the attachment 22 can serve as a depth guide as well serving to guide the chain saw along a straight edge 48 (see FIG. 4) laid along the line of the groove that is to be cut in the timber. The rounded rear edges 36 of the lower prongs 38 provide an excellent pivot point with good leverage and control to produce a positive depth control for cutting kerfs. It also may be desirable to replace the forwardmost nut 42 with an axially elongated nut (not shown) that would ride on top of the straight edge 48. The attachment of the invention is also designed to be reversible for positive depth control and straight edge guides. This may be very useful to firefighters for cutting into roofs or walls of a building where the depth of the cut could be critical to avoid cutting into electrical wires or other utilities located and hidden in the walls. Building contractors and demolition contractors may also find this feature useful.

Although the attachment 22 of the invention is designed to be easily installed and removed, because of its unique design, it is not necessary to remove the attachment when the chain saw 10 is used in most applications. The attachment thus provides a safe and practical addition to chain saws that makes chain saws much more useful, safer and more efficient.

Having thus described the invention in connection with the preferred embodiment thereof, it will be evident to those skilled in the art that various revisions and modifications can be made to the preferred embodiment described herein without departing from the spirit and scope of the invention. It is my intention, however, that all such revisions and modifications that are obvious to those skilled in the art will be included within the scope of the following claims.

Claims ( 3 )

An attachment for use with a chain saw having a housing at its inner end containing a motor with a chain bar extending outwardly from the housing and a cutting chain driven by the motor so as to travel longitudinally around the top and bottom of the chain bar, the chain bar having a plurality of longitudinally and equally spaced-apart openings, said attachment comprising: a pair of juxtaposed stop members adapted to be mounted on the chain bar between the housing and the outer end of the chain bar with one of the stop members positioned on each side of the chain bar, each stop member being formed of a single piece of substantially flat, rigid material and having a central connecting member, a first pair of longitudinally spaced apart prongs extending upwardly from the connecting member so that the prongs extend beyond the path of the chain traveling over the top of the chain bar when the stop members are mounted on the chain bar, a second pair of longitudinally spaced apart prongs extending downwardly from the connecting member of each stop member so that the second pair of prongs extend beyond the path of the chain traveling over the bottom of the chain bar when the stop members are mounted on the chain bar, each of the first prongs having a substantially straight rear edge that is at an angle of 20° to 30° from a line perpendicular to the top path of the chain and a front edge that curves rearwardly and joins the rear edge at the outermost point of the first prong, each of the second prongs having a substantially straight front edge that is at an angle of 20° to 30° from a line perpendicular to the bottom path of the chain and a rear edge that curves forwardly and joins the front edge at the outermost point of the second prong, each stop member having a pair of longitudinally spaced apart openings corresponding to the spacing of the openings in the chain bar so as to provide for mounting of the stop members on the chain bar, the openings in each stop member being at substantially the same distance from the front and rear edges of the stop member so as to provide for reversed mounting of the stop members on the chain bar with the curved edge of each of the second prongs being the front edge that provides a pivot point for cutting kerfs, means to space each stop member from the chain bar a sufficient amount to allow the chain to pass without interference between the stop members when the stop members are properly installed on the chain bar, and removable fasteners combined with the openings in the stop members and the chain bar for removably attaching the stop members to the chain bar.

The attachment of claim 1 in which the means to space each stop member from the chain bar is a spacer separate from the stop member.

The attachment of claim 2 in which the openings in the stop members are spaced so as to correspond to the spacing of the openings in the chain bar thereby providing for varying the position of the attachment along the chain bar.

Prune the trees on your property safely and efficiently with the pole saw that best suits your needs.

By Glenda Taylor and Timothy Dale and Mark Wolfe | Updated May 19, 2023 12:54 PM

We may earn revenue from the products available on this page and participate in affiliate programs.

In order to stay healthy and look their best, trees need occasional pruning to remove broken branches and to thin out dense limbs. One of the best ways to tackle this sort of project is with a pole saw. While it’s basically a chainsaw attached to a long pole, a pole saw holds the blade securely, letting you reach up to cut branches while remaining safely on the ground.

Although pole saws can make pruning a whole lot easier, they’re not right for every situation. If you only need to prune thin twigs, vines, or foliage, you may not need one. However, if you need to cut tree branches between 2 and 8 inches in diameter, a pole saw could be just the ticket.

To find out which pole saws perform the best, we field-tested some of the best options on the market. Keep reading to see our results and to learn about the main considerations when selecting a trimming tool for your landscaping needs.

• BEST OVERALL:Greenworks 40V Cordless Pole Saw
• BEST BANG FOR THE BUCK:Worx 8-Amp 10-Inch Corded Pole Saw Chainsaw
• BEST BATTERY:Ego Power 10-Inch 56-Volt Multi Head Pole Saw
• BEST CORDED ELECTRIC:Sun Joe 8-Inch 6.5-Amp Telescoping Electric
• BEST LIGHT-DUTY:Worx 20V Power Share 8-Inch Pole Saw
• BEST HEAVY-DUTY:Maxtra Gas Pole Saw 2-Cycle Tree Trimmer
• BEST GAS COMBO:Proyama Powerful 5-in-1 Multi Functional Pole Saw

How We Chose the Best Pole Saws

We used the pole saws in this guide to trim up encroaching branches from a backyard’s natural area. The area included a mix of green hardwoods and evergreens, as well as hardened dead branches. We did our best to push each tool to its operable limits in terms of working height, difficulty of reach or angle, and branch diameter.

We based our considerations and Комментарии и мнения владельцев on the tools’ physical measurements, as well as the ways they performed and felt. We assumed that most readers would not require an expensive pro-quality tool for daily use but would still be interested in high-quality equipment capable of occasional long work days. Therefore, we based our top picks on a combination of functionality, durability, and price point.

Our Top Picks

We tested the following products extensively based on the available types of pole saws available. Each pole saw was selected based on its reputation for quality in a range of areas, such as cutting- bar length, working height, runtime, weight, and overall capability. Use our reviews to help choose the best pole saw to maintain the trees, hedges, and other foliage in your yard.

Greenworks 40V Cordless Pole Saw

With 40 volts of power, the Greenworks cordless pole saw offers top-notch cutting ability in a convenient battery-operated saw. It’s lightweight at just 9.3 pounds and particularly easy to handle, thanks to the inclusion of reduced vibration technology. The cordless pole saw comes with a battery and a charger, and it can be started instantly with the simple push-button control instead of having to deal with the pull cords on gas pole saws.

The pole saw is great for reaching those high-up branches thanks to the tool’s generous pole length. Its telescoping bar extends for a nearly 9-foot working height and it has an 8-inch cutting bar enabling users to cut through out-of-reach branches up to about 6 inches in diameter. This pole saw is available as a stand-alone tool or as a multi-tool kit with a power hedge-trimmer attachment. The same 40-volt powerhead and battery run both attachments, saving space in the garage.

We liked the combination of convenience, weight, and reach that this saw offered. The 40-volt battery delivers plenty of power to cut through even dry, hardened dead branches. Plus the bar is mounted at a slight angle to the handle, making it safer and easier to cut branches in a downward direction when standing back away from the line of fall.

• Good power and runtime for ample amounts of cutting tasks
• Angled bar for better leverage while cutting wood and branches
• Lightweight but strong construction will not cause strain on the user
• Plenty of reach for high branches and maneuverability
• Limited to smaller branch diameters; may not be suitable for heavy-duty cutting
• Small bar oil reservoir may not be ideal for some users’ preferences
• Battery sticks in the housing

Get the Greenworks pole saw at Amazon.

Worx 8-Amp 10-inch Corded Pole Saw Chainsaw

The Worx corded electric pole chain saw is an affordable 2-in-1 power tool that can be used as both a pole saw when the extension pole is attached and as a regular chainsaw without the extension pole. The telescoping pole is 8 feet in length, giving the pole saw up to 10 feet of working range when it is fully extended. Weighing in at just 10 pounds, this pole saw is made so that it’s easy to hold and maneuver.

The corded pole saw features built-in automatic chain lubrication to ensure that the chain portion of the saw is always operating at peak efficiency, making for quicker, more controlled cuts. With a 10-inch cutting bar, the pole saw can be used on branches or tree trunks that are up to 8 inches in diameter. It also includes a blade protection cover to keep the saw blade safe when it’s not in use.

Testing this electric pole chain saw was a unique experience. Because a whole chainsaw is attached by means of a mechanical adapter to the top of the extension pole, the tool is top-heavy. However, being a corded electric saw, it offers lots of power and a long 10-inch bar. The saw is easy to attach to and detach from the pole in about a minute. The best attribute is its versatility.

• Versatile electric chainsaw or pole chainsaw for a variety of cutting tasks
• Powerful motor can take on longer tasks with ease
• 10-inch cutting bar length provides ample reach and cutting power
• Top-heavy design may not be comfortable for some users
• Not comfortable for extended use or long runtimes
• Attachment system is somewhat clunky

Bet the Worx saw chainsaw at Amazon.

Ego Power 10-Inch 56V Multi Head Pole Saw

The Ego Power 56-volt tool collection includes a variety of mowers, blowers, and other cordless electric yard maintenance tools, all powered by the same 56-volt arc rechargeable lithium-ion battery. These tools boast gas-like power in a clean, cordless package. This pole chainsaw is part of Ego’s multi-attachment powerhead series, which includes seven other interchangeable attachments: a bristle brush, a rubber broom, a cultivator, a hedge trimmer, a string trimmer, and a pole extension. It is available as the attachment only or sold with the powerhead.

The saw offers ample cutting power and a generous 10-inch cutting bar length and is capable of cutting through an 8-inch limb. The assembled tool length is about 7.5 feet, which may be extended by adding the optional 31-inch pole extension (sold separately). If this is the only Ego tool owned, it will be costly due to the price of the lithium-ion battery, but adding it to an existing Ego lineup brings the cost in line with other cordless pole chainsaws.

We liked this tool a lot. The heavy battery at the back end makes it balance more like a gas- powered saw, with cutting power to match, and the overall weight was lighter than most gas pole saws. Without an extension pole, the reach is shorter than most other pole saws, but it could be adequate for some.

• Long lithium-ion battery runtime provides enough power for multiple tasks
• Excellent power per charge; provides 56 volts of power
• Powerhead works with 7 other attachments for a variety of tasks

Get the Ego Power pole saw at Amazon.

Sun Joe 8-Inch 6.5-Amp Telescoping Electric Saw

Weighing just 7 pounds, the lightweight Sun Joe corded electric pole saw is a great option if the pole saw needs to be used for more than an hour at a time. Users won’t need to wait for a battery to recharge or have to make a trip to the gas station with this corded electric tool that can run as long as there is an active electrical connection. However, movement is limited by the length of the extension cord, so it’s a good idea to invest in a cord that can reach any trees or hedges in the yard.

This pole saw has a telescoping pole that can extend more than 8 feet, giving the user about 10.7 feet of maximum working height. It can cut through branches up to 6 inches thick with the 8-inch cutting bar length, and the pole saw automatically lubricates itself to help keep the saw blade in good working order.

We liked the ease of plug-and-play without having to worry about mixing fuel or charging a battery. This saw feels lightweight, yet it offers enough power to cut through branches of small to medium thickness and is well-balanced. It’s a practical and budget-friendly choice for occasional use.

• Plug-and-play convenience for quick and easy use
• High-quality OrEgon-brand bar and chain for long-term use and durability
• Comfortable for occasional extended use during DIY projects
• Only for use on smaller branches
• Fixed straight bar does not cut directly downward
• Small bar-oil reservoir; may not meet some users’ needs

Get the Sun Joe electric saw at Amazon, Tractor Supply Co., or Target.

Worx 20V Power Share 8-Inch Pole Saw

This cordless pole saw is ideal for those with small to midsize yards that dont need the heavy-duty power of gas pole saws. Powerful enough to trim branches up to 6.5 inches in diameter, it boasts a telescoping pole that gives users a maximum working height of 13 feet.

This battery-powered pole saw also has an automatic chain tensioner and a chain lube system, and it weighs 8 pounds. Plus, it’s budget-friendly. However, one of the best features of this tool is the three-position head that gives the user the option between 0 degrees, 15 degrees, or 30 degrees to help trim hard-to-reach branches.

This was the lightest-weight non-corded pole saw we tested, and it was only a pound heavier than the lightest overall. The 20-volt battery delivers a surprising amount of power, good for cutting all of the branches we tried. And it offers a really tall reach. For occasional use on a branch or two, this tool makes a lot of sense.

• Lightweight but powerfull; suitable for light- to heavy-duty use
• Comfortable to work with; will nto cause strain on the user
• Long reach for maneuvering in hard-to-reach places
• Compact size for ease of storage
• Relatively short runtime compared to similar pole saws available
• Small bar-oil reservoir; may not be suitable for some users’ preferences
• Clamps allow the telescoping pole to slip from the locked position

Get the Worx pole saw at Amazon, Target, or Tractor Supply Co.

Maxtra Gas Pole Saw 2-Cycle Tree Trimmer

This pole saw has a 10-inch cutting bar that can be used for pruning or trimming branches up to 8 inches in diameter. Even more impressive is the telescoping pole that can be adjusted from 8 feet to more than 11 feet, giving the user a maximum working height of about 13 feet.

However, the quick pace at which this pole saw cuts is due to the powerful gas engine. The power produced by the 42.7-cc 2-cycle engine allows users to handle heavy-duty tasks, like cutting down small trees or removing large branches. It weighs in at a hefty 21 pounds.

The first thing we noticed about this saw was how much heavier it is than the electric and cordless models. The weight is held at the bottom of the saw instead of at the cutting head, so it balances much differently. The included harness is necessary to reduce user fatigue. The huge fuel tank will offer hours of runtime, so for tough jobs and extended use, this saw would be a good choice.

• 10-inch cutting bar provides good reach for easy maneuvering around the yard or garden
• Powerful 2-cycle motor can take on thicker branches and wood
• Includes a harness to reduce operator fatigue
• than twice as heavy as electric; may not be suitable for some users
• Loud engine noise may cause some noise pollution
• Awkward pole assembly system; may be tricky for first-timers

Get the Maxtra tree trimmer at Amazon.

Proyama Powerful 5-in-1 Multi-Functional Pole Saw

Powerful yet lightweight, this Proyama gas-powered pole saw weighs just 13 pounds, despite the 42.7cc 2-cycle motor. The pole saw is easy to lift, hold, and maneuver, and it has a telescoping pole that can be adjusted from 8 feet to just over 11 feet, giving the user a maximum working height of about 13 feet. This pole saw can be used on branches up to 10 inches in diameter due to its long 12-inch cutting bar.

Included with the gas-powered pole saw are several additional trimming tools that can be attached in place of the pole saw. These extra attachments include a hedge trimmer, a brush cutter, and a string trimmer. The pole saw also includes ear protection, a face shield, safety gloves, and a pole saw bar scabbard to help keep the pole saw blade safe when not in use.

We appreciated the robust cutting power and reach this tool offered. The ample- size bar and powerful motor is capable of cutting through dangerously large branches. User beware, though; take down those big branches in smaller sections. We found the big gas engine to be excessively heavy for continuous use; thankfully, though, a harness is included.

Best Gas Pole Saws 2023 to use your Backyards & Gardens!

• Very powerful engine can take on heavy-duty tasks
• Long cutting bar provides ample reach in gardens and yards
• Large fuel tank for all-day use or heavy-duty tasks
• Very heavy compared to similar options available
• Loud engine noise may cause some noise pollution
• Awkward pin and tension screw pole assembly system

Get the Proyama trimming tool at Amazon.

What to Consider When Choosing the Best Pole Saw

Like all power tools, pole saws are designed to suit various needs; some are geared toward the do-it-yourselfer, while others are better suited for professionals. Consider the following factors when shopping.

Types of Pole Saws

Pole saw power options include corded electric, battery-operated, and gas-powered. Not only does the type of power affect the cost of the saw, but it also factors into its intended use. Get to know these three types of pole saws better to find the right one for your landscaping needs.

Corded Electric

For users with small yards, corded electric pole saws are an affordable option. Since it connects to a power outlet, however, users are restricted in how far they can trim by the length of an extension cord. Electric pole saws are quieter than gas-powered pole saws, but don’t expect silent operation—all pole saws make noise.

Electric pole saws aren’t as powerful as gas-powered models; the power they produce is measured in amperes (amps) and most range from 6 to 10 amps, which is powerful enough to cut branches from 2 to 5 inches in diameter.

Battery-Operated

Cordless pole saws are powered by rechargeable batteries. They’re a good choice for medium-size to large yards if users don’t want to be restricted by the length of an extension cord. These pole saws are ideal for branches 3 to 8 inches in diameter and are quieter than their gas-powered counterparts.

Cordless pole saws’ power capability is measured in volts, which relates to battery size, and ranges from 40 to 80 volts. The higher the volts, the more powerful the saw. Battery-operated pole saws are typically more expensive than their corded counterparts.

Gas-Powered

If there are a lot of trees to trim and the user doesn’t mind the noise, a gas-powered pole saw is a good option. Gas pole saws are measured by engine size in cubic centimeters (cc) and range from 20 to 40cc. The larger the engine, the more powerful the saw.

Professionals often use commercial-grade gas-powered pole saws because they can operate for hours and cut through branches up to 8 inches in diameter (branches larger than 12 inches in diameter are usually cut with heavy-duty chainsaws).

With the increased power of a gas pole saw comes a higher price and more maintenance requirements. Unlike electric tools, gas-powered saws require oil changes and fuel tank refills.

Cutting Bar Length

On a pole saw, the cutting bar determines the maximum branch diameter that can be cut. Bar lengths run from 6 to 12 inches, with 8 inches being the most common. Gas-powered pole saws feature the longest cutting bars (usually between 10 and 12 inches), which is one of the reasons they’re better equipped for tougher jobs.

The standard rule of thumb is that the cutting bar should be a minimum of 2 inches longer than the diameter of the branch. For example, an 8-inch bar is needed to cut a branch 6 inches in diameter.

Working Height

A pole saw’s “working height” often appears on the packaging but doesn’t indicate the actual length of the pole—it refers to the length of the pole plus an arm length. Manufacturers typically estimate 2 to 3 feet for arm length, so if the pole saw claims to have a 10-foot working height, the pole saw will be 7 to 8 feet long from tip to tip.

Most pole saws max out at a 10-foot to 12-foot working height; at greater heights, the tool can become difficult to control safely, especially in windy conditions. Many models include telescoping poles that allow length adjustment. A telescoping pole makes it easier to quickly switch between trimming the hedge at ground level and cutting a tree branch 6 feet overhead.

Runtime

Both cordless and gas pole saws rely on fuel that will gradually run out as the tool runs. Gas pole saws eventually need to have the gas tank refilled when they run out. Typical runtime per tank ranges from 2 to 4 hours. However, when there is spare gas available nearby, refilling the gas tank doesn’t take long.

Cordless pole saws operate on batteries that typically have a runtime between 30 to 60 minutes depending on the power output and the specific battery. Once the battery runs out, it takes about an hour to recharge. It’s a good idea to have a spare battery so that one can always be ready to use.

Weight

It’s important to remember that these tools aren’t supported by anything except the user, so the entire weight of the tool needs to be properly held, balanced, and controlled even when a telescoping pole is at its full length. If that isn’t possible for the specific user, then the tool is too heavy.

Gas pole saws have powerful engines, but the increased power also adds weight. Due to the heavy motors, they typically weigh between 20 to 25 pounds. Cordless pole saws weigh less than gas pole saws, but they can still weigh about 15 to 20 pounds.

The lightest option for a pole saw is a corded electric model. They don’t need a battery or the technology to equip and transfer battery power to a motor, so electric pole saws are usually less than 15 pounds.

Safety

Safety needs to be one of the first concerns when it comes to operating a powerful cutting tool like a pole saw. Take some time to look through the manual to know how to adhere to the manufacturer’s recommendations for use. Also, keep in mind that while the pole saw may feel comfortable when it’s being used at ground level on a hedge, once the pole is extended the pole saw gets more difficult to hold, maneuver, and control.

Look for pole saws that are equipped with easy-to-grip handles and telescoping poles for better control over the saw. If the current height is too difficult to manage, a telescoping pole can be shortened to help the user regain control. Saw guards are also helpful to protect the user and the saw blade when the pole saw isn’t being used.

Additional Features

Manufacturers are constantly striving to make pole saws more comfortable and easier to operate. On some saws, there are anti-vibration features and nonslip grips, and many pole saws come with a self-oiling chain. If it’s not self-oiling, the user will have to oil the chain by hand, which will be detailed in the owner’s manual.

Some pole saws feature a cutting head that can be detached from the end of the pole for use as a handheld chainsaw. This can be helpful if the desire is to cut a branch into smaller pieces after felling it for firewood.

FAQs

Pole saws are dangerous tools that should be used only by those who are confident about how to operate the tool and who have taken proper safety precautions, like wearing personal protective equipment. To learn more about how this tool can be used, take a look at these answers to commonly asked questions below.

Q. Can you use a pole saw as a chainsaw?

A pole saw is intended to cut difficult-to-reach branches in order to trim trees, hedges, and other foliage. While the saw does effectively cut through wood, it’s not large enough to fully replace a chainsaw. A chainsaw has the power and size to be able to cut through the trunk of a tree, while a pole saw is best used for tree trimming.

Q. Can you trim hedges with a pole saw?

These versatile tools can be used in place of a hedge trimmer to maintain hedges, vines, and brambles, if necessary.

Q. How big a limb can I cut with a pole saw?

Depending on the size of the saw and the power potential of the tool, pole saws can be used to cut branches from 2 to 9 inches in size. Just keep in mind that the best electric pole saw will likely have less power output than the best gas pole saw, so if the tool will be used regularly for very thick branches, then a gas pole saw would be better.

Q. Can a pole saw get wet?

While most pole saws have some resistance to water, it isn’t a good idea to get the pole saw wet because the water can damage the electric components of the tool or cause rusting and corrosion on the saw. However, it should be noted that there is no harm in using a pole saw to cut through wet wood—just make sure to properly clean the saw after use so that moisture doesn’t cling to the metal and cause rusting.

Q. Is it safe to use a pole saw on a ladder?

Even the best pole saws aren’t safe to use on a ladder. The saw is situated at the end of a long, telescoping pole that may be able to reach up to 12 feet away without the need for a ladder. Electric pole saws also have power cords that can cause users to trip, but even with a cordless pole saw it’s too difficult for the user to safely keep themselves balanced while operating this power tool on a ladder.

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Over the course of his decades-long career, Bob Vila has helped millions of people build, renovate, repair, and live better each day—a tradition that continues today with expert yet accessible home advice. The Bob Vila team distills need-to-know information into project tutorials, maintenance guides, tool 101s, and more. These home and garden experts then thoroughly research, vet, and recommend products that support homeowners, renters, DIYers, and professionals in their to-do lists.

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Home » Latest Tool Reviews » Lawn Garden » Ryobi EXPAND-IT 10″ Pole Saw Attachment

Ryobi EXPAND-IT 10″ Pole Saw Review

It is summer time. The sun is shining, the humidity is making you sweat through your pants, and all that leafy green and barked covered stuff on your property is growing out of control. The Tool Box Buzz crew feels your pain and that is why we are working hard to bring you as many outdoor power equipment (OPE) reviews as we possibly can. This is a review of the EXPAND-IT 10″ Pole Saw Attachment from Ryobi for their 40V series of cordless OPE.

Recently I had the opportunity to review Ryobi’s 40V EXPAND-IT String Trimmer and was impressed with the capabilities of the tool. The 10″ pole saw attachment is designed to interface with the trimmer power head thanks to Ryobi’s EXPAND-IT system. This pole saw is extendable and convenient. It offers impressive power thanks to Ryobi’s 40V battery platform and is extremely user friendly. For small to medium sized limbs and brush, the Ryobi EXPAND-IT 10″ Pole Saw is a surprisingly well though out piece of OPE.

Features Specs:

• 10″ Bar and Chain With 6″ Cutting Capacity
• Angled Cutting Head For Better Control
• Extension Shaft For Up To 12′ Reach
• Automatic Oiler
• Tool-Less Assembly
• 3 Year Limited Warranty
• Weight: 6 Lbs.

Features:

The 10″ bar and chain assembly of the Ryobi Pole Saw is great for small trimming and pruning tasks. The factory bar and chain appear to be OEM from Ryobi but overall fit and finish are good. The head assembly is angled to allow a more natural cutting position. This angle will allow you cut downwards as if you were using a handheld saw. This puts less fatigue on the bar and reduces the chance of the chain binding. The chain is a 3/8″ LP (Low Profile) so you will need a smaller gauge file for sharpening than your average chain.

A flat headed adjusting block screw on the face of the tool head adjusts chain tension. This feature works well and is easy to access. A good rule of thumb is to always check your chain tension after making your first cut. The heat generated from cutting will cause the chain to expand and stretch slightly.

Located on the back side of the tool head is a tank for bar and chain oil. The tank will holds about 8 Fluid Ounces of oil. Ryobi includes a bottle of bar oil with the pole saw kit as well as an adjustment wrench. The wrench fits the chain adjuster and nut for the bar assembly housing perfectly.

One other nice feature from Ryobi is an included carry strap that allows you to sling the pole saw over your shoulder during use for better balance and leverage. The strap includes a mounting ring to be attached by the user to the shaft of the trimmer. You set the height to maximize your comfort.

Keeping the Ryobi Pole Saw Lubricated

Bar and chain oil is different from conventional weight motor oil. It is far more tacky with a higher viscosity rating so it bonds to the bar and chain better. You don’t need Ryobi specific oil. You can use any quality bar and chain oil to keep your pole saw running.

Room for Improvement

While using the tool a couple of issues stood out to me that I would like to see addressed by Ryobi. The head of the tool needs a brush hook. A small hook for moving limbs would be a welcomed addition. This is a feature that other pole saws, such as the the Milwaukee, have standard.

Also, I would like to see a brand name chain be included. The provided Ryobi OEM chain was sharp out of the box, but I do not know how it will hold up to both use and resharpening.

Intended Use?

This is a home owner grade pole saw, however, it is a well thought out and easy to use home owner grade pole saw! If you currently use the Ryobi 40V battery platform or own the 40V trimmers, then the Ryobi EXPAND-IT 10″ Pole Saw is the perfect accessory for you. The pole saw is ergonomic, well balanced, and fast to assemble. It does not have the power and long term durability of a pro grade model, but it is an excellent option for doing light tree trimming work around your house or property.

Ryobi Pole Saw Price and Availability

The Ryobi EXPAND-IT 10″ Pole Saw is available now for about 109.00 at Home Depot. Like all Ryobi tools, this accessory is primarily available from Home Depot and Amazon.

US2839097A. Chain saw attachment for portable circular saw. Google Patents

Publication number US2839097A US2839097A US583148A US58314856A US2839097A US 2839097 A US2839097 A US 2839097A US 583148 A US583148 A US 583148A US 58314856 A US58314856 A US 58314856A US 2839097 A US2839097 A US 2839097A Authority US United States Prior art keywords saw extended shaft housing bar Prior art date 1956-05-07 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired. Lifetime Application number US583148A Inventor James O Siria Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) CHARLES J VAGIM EDWARD C MOSESIAN NEWTON J CAFFEJIAN Original Assignee CHARLES J VAGIM EDWARD C MOSESIAN NEWTON J CAFFEJIAN Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 1956-05-07 Filing date 1956-05-07 Publication date 1958-06-17 1956-05-07 Application filed by CHARLES J VAGIM, EDWARD C MOSESIAN, NEWTON J CAFFEJIAN filed Critical CHARLES J VAGIM 1956-05-07 Priority to US583148A priority Critical patent/US2839097A/en 1958-06-17 Application granted granted Critical 1958-06-17 Publication of US2839097A publication Critical patent/US2839097A/en 1975-06-17 Anticipated expiration legal-status Critical Status Expired. Lifetime legal-status Critical Current

Links

• 241000763859 Dyckia brevifolia Species 0.000 description 38
• 230000002093 peripheral Effects 0.000 description 16
• 238000006243 chemical reaction Methods 0.000 description 4
• 239000004519 grease Substances 0.000 description 4
• 241000537377 Fraxinus berlandieriana Species 0.000 description 2
• 210000001215 Vagina Anatomy 0.000 description 2
• 230000000694 effects Effects 0.000 description 2

Images

Classifications

• B — PERFORMING OPERATIONS; TRANSPORTING
• B27 — WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
• B27B — SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
• B27B17/00 — Chain saws; Equipment therefor
• B27B17/0083 — Attachments for guiding or supporting chain saws during operation

• B — PERFORMING OPERATIONS; TRANSPORTING
• B27 — WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
• B27B — SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
• B27B17/00 — Chain saws; Equipment therefor
• B27B17/0016 — Devices to adapt the chain saw for other purposes, e.g. drilling

• B — PERFORMING OPERATIONS; TRANSPORTING
• B27 — WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
• B27B — SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
• B27B17/00 — Chain saws; Equipment therefor
• B27B17/14 — Arrangements for stretching the chain saw

• B — PERFORMING OPERATIONS; TRANSPORTING
• B27 — WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
• B27C — PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
• B27C9/00 — Multi-purpose machines; Universal machines; Equipment therefor
• B27C9/005 — Multi-purpose machines; Universal machines; Equipment therefor portable

Description

United States Patent CHAIN SAW ATTACHMENT FOR PORTABLE CIRCULAR SAW James O. Siria, Fresno, Calif., assignor, by direct and mesne assignments, of one-third each to Edward C. Mosesian, Newton.l. Caifejian, and Charles 5. Vagina, as copartners, doing business as Cenatron Industries, Fresno, Calif.

Claims. (Cl. 143-32) The present invention relates to portable, mechanically driven, hand saws and more particularly to a conversion attachment for mounting saw chains on a circular saw in lieu of the circular saw blades thereof.

There are numerous types of circular saws which are portable, electrically driven, and which are held in the hand during operation. A conventional circular saw generally consists of a housing having a handle connected thereto. and enclosing a small electrical motor which provides an output shaft. A circular saw blade generally of from six to ten inches in diameter is mounted on a shaft and the latter is extended into the housing in driven The housing usually has a guard portion which partially encloses the saw blade as a safety measure.

Though not as common, there are also portable, electrically driven, hand held chain saws available. In appearance, these saws are similar to the circular saws except that chains having teeth connected thereto are mounted in driven connection to the motors therefor.

HeretOfOre, satisfactory structures alternately useable asv circular and chain saws have not been known, nor have acceptable conversion attachments for circular saws capable of readily adapting such saws for receipt of chain saw blades been available. Thus, it has been necessary to purchase two separate units if the advantages of each type of saw are to be realized.

Accordingly, it is an object of the present invention to provide an auxiliary attachment for releasably mounting saw chains on a circular saw in place of the circular saw blades thereof.

Another object is to provide a sawing apparatus adapted for use with either a circular saw blade or a saw chain.

‘Another object is to obviate the expense, inconvenience and burden of having to acquire both a chain saw and a circular saw in order to attain the advantages of each.

Another object is to adapt a circular saw for use with.a saw chain so that the change from one type of saw to the other can be accomplished in a minimum of time and with a minimum of inconvenience.

Another object is to provide an attachment of the nature described which is adjustable to permit slackening or tightening of the saw chain.

Another object is to provide an attachment as described above which mounts a saw chain in such a manner that it maybe quickly and easily removed for replacement and/or repair.

Other objects are to provide an attachment for mounting saw chains on circular saws which is simple and eco ‘nomical to make, adaptable to many types of portable,

mechanical hand saws, and which is dependable, durable, and is highly effective for accomplishing its intended purposes.

Fig. l is aside elevation of a chain saw having the attachment ofthe present invention mounted thereon and ice showing in dashed lines a circular saw blade and guard as normally employed with the circular saw.

Fig. 2 is a somewhat enlarged face view of the attachment of the present invention with a cutter bar of the attachment fragmentarily shown in dashed lines.

Referring more particularly to the drawing, a portable, electric, hand manipulated circular saw 15 is shown in Fig. 1 which typifies many types of such saws which are presently available. The saw includes a housing 11 having a substantially cylindrical portion or wall 12 and an end portion 13 to be specifically described. A handle 14 is connected to the cylindrical portion of the housing and mounts a trigger switch 15 therein. For convenience in handling the saw during operation, a knob 16 is also connected to the housing and upwardly extended forwardly of the handle.

A small electric motor 20 is mounted within the cylindrical portion 12 of the housingll and has an output shaft 21 endwardly extended through an opening in the cylindrical portion which is partially enclosed by the end portion 13 of the housing. A cog 0r pinion gear 22 is formed on the end of the output shaft or, alternatively, may be rigidly secured in endward extension from the shaft. The motor is energized through a power cord 23 which is connected to the motor and extended throughthe housing and the handle 14 outwardly of the saw, as seen in Fig. 1. The trigger switch 15 is connected in series with the cord so that when the cord is connected to source of voltage, the motor may be energized and de-energized by squeezing and releasing the trigger.

The end portion 13 of the housing 11 includes a Fiat mounting flange 26 of generally semicircular form as seen in Fig. 1. The mounting flange is held in substantially normal relation to the output shaft 21 by means of protuberances 27 inwardly extended therefrom and abutting the cylindrical portion c2 of the housing. Elongated bolts 28 are extended through the mounting flange and protuberances.and screw-threadably received in the cylindrical portion of the housing.

The end portion 13 of the housing 11 also has an inwardly extended portion 29 having a substantially circular grease 30 providing an opening receiving the output shaft 21 and cog 22 of the motor 20. A hearing 32 is concentrically positioned in the opening and journals the output shaft therein. A shoulder 33 is formed in circumscribing relation to the and a plurality of threaded bores 34- are extended inwardly in the portion 29 from the shoulder in substantially parallel relation to the output shaft. The end portion 13 of the housing also has a cylindrical socket 36 eccentric to the output shaft, and a bearing 37 is frictionally fitted in the socket for a purpose to be described.

The end portion 13 of the housing 11 further has an arcuate substantially semicircular peripheral portion or intermediate flange 3% perpendicularly outwardly extended from the mounting flange 26 and an arcuate downwardly extended outer flange 39. The top and outer flanges of the housing together with the adjacent portion of the mounting flange form a saw guard, as will be seen.

A substantially cylindrical spur gear 45 is positioned in the grease 3%) and provides external gear teeth 46 in mesh with the cog 22 on the motor output shaft 21. The spur gear also has a central bore circumscribed by a plurality of internally grooved keyways 47 disposed axially of the gear.

An elongated drive shaft 55 provides a cylindrical inner end 56 rotatably fitted in the bearing 37, a plurality of longitudinally extended peripherally spaced keys 57 slid guard 66 are indicated in dashed lines in Fig. l.

‘ 7 ably received in the keyways 47 of the spur gear 45, a cylindrical bearing portion.58, a cylindrical mounting portion 59 of a diameter somewhat less than the bearing portion, and an outer threaded end 60. A washer 61 is located on the inner end 56 of the shaft against the spur gear 45. a

A circular saw blade 65 and an associated movable This saw blade is normally mounted on the drive shaft 55 or one similar thereto, for rotation with the shaft incident to energization of the motor 20.

The attachment of the present invention is generally indicated at 70 in Fig. 1 and is adapted to be connected to the circular saw 10 after the saw blade 65.has been removed. The attachment includes a generally rectangular mounting block 71 having inner and outer sides 72 and 73, and front and rear end portions 74 and 75. As best seen in Fig. 3, a substantially circular boss 77 is inwardly extended from the rear portion of the block and is frictionally fitted in the of the housing 4 so that the shoulder 33 abuts the mounting block. The mounting block provides a plurality of apertures 78 adapted for alignment with the bores 34 in the housing, and elongated bolts 79 are extended through the apertures and screw-threadably received in the bores 34. When thus connected to the housing, the mounting block extends forwardly in substantially radial relation to the drive shaft 55, as is evident in Fig. l. i i

The mounting block 71 provides an opening 82 concentric to the socket 36 in which is located a roller hearing 83 receiving the bearing portion 58 of the drive shaft ’55 for rotation thereof relative to the mounting block.

The block provides a ledge inwardly extended in circumscribing relation to the opening and a washer 84 is interposed the bearing 83 and the ledge. It is to be noted that the mounting portion 59 and the threaded end 60 of the drive shaft extend outwardly of the mounting block.

The mounting block 71 further provides ‘a spacing means in the form of an outer boss 86 laterally extended from the front portion 74 as best shown inFigs. 2-and’4. A pair of elongated threaded studs 87 provide inner ends rigidly secured to the outer boss and are outwardly extended from the mounting block in substantially normal relation thereto. The studs are in spaced parallel relation and are in a substantially common plane with the drive shaft when the mounting block is in the described position on the saw.

An elongated cutter bar 90 provides inner and outer sides 91 and 92 and front and rear portions 93 and 94. The bar has an elongated slot 95 longitudinally extended inwardly from the rear edge thereof. The bar is positioned against the outer boss 86 of the mounting block 71 with this slot fitted over studs 87. The cutter bar also has an adjustment bore 96 in the outer side 92 and located adjacent to the studs 87, a peripheral edge 98, and a guiding groove 99 in said edge.

A small substantially rectangularadjustment plate 100 7 gated recessed channel 102 in the surface thereof facing the.cutter bar, and an elogated threaded adjustment. rod

103 is positioned in the channel and rotatably mounted in the plate. A peg 104 is threadly received on the rod and is inwardly extended toward the cutter bar transversely of the rod and is releasably fitted into the bore 96 in the bar. Nuts 105 are screw-threaded on the studs and tightened inwardly against the plate for securely mounting the cutter bar on the mounting block 71. It will be noted thatthis arrangement also positions the cutter bar Adrive sprocket or wheel 110 is fitted over the’mountrotation relative to the drive shaft by a key 111 driven into keyways 112 and 113 in the sprocket and the ‘drive shaft. A washer 114 is positioned between the sprocket and the bearing portion 58 of the drive shaft; a washer 115 is positioned on the drive-shaft outwardly of the sprocket; and a nut 116 is sc’rew-threadably received on the threaded end 60 of the drive.shaft against the washer 115.

An endless saw chain 120 provides a plurality of,,c on-. nected links 121, a plurality of teeth T122 hutwardly ‘jex tended from the chain, and a pluralityof guides;,123 inwardly extended from the chain. :The chain-.is t-positioned around the sprocket 110 and the cutter. bar so 7 that the guides 123 are slidably received in the groove 99, the links 121 are in mesh with the sprocket, and the blades extend outwardly. 5’

A gripper bar 125 having a plurality of gripper teeth thereon is secured to the inner side 72 of the’front end portion 74 of the mounting block 71. The teeth are adapted to bite into timber being cut to steady-the ,saw and to enable a leveraging effect for more effective cutting action.

Operation The operation of the described embodiment ofthe present invention is believed to be readily apparent and is brieflysummarized at this point. Initially it isto’ be understood that the saw chain 120 may be provided with its. own drive shaft 55 or that the same drive shaft may be used for both. the circular saw blade and the: chain saw blade 120. It may be necessary to employ a slightly longer drive shaft for the attachment than is normally used for the circular saw. The attachment 70 jofthe present invention is connected to the circular s w 10 after the circular saw blade has been remove’cLyWith the shaft 55 in position, the bearing portion ’58; ,the I is, that the cutter bar 90 is not connected to the mounting.

block 71, the’inner boss 77 of the mounting blockf71 ‘is then fitted into the 30 and the apertures 78 aligned with the bores 34. The bolts 79 are then inserted and tightened so that the mounting block is rigidly heldin forward, radial extension-from the drive shaft 55. I,

Next, the cutter bar 90 is placed against theouter boss 86 with the mounting studs 87 extended through the slot 95. The holes 10101: the adjustment. plate are slipped over the studs, and the adjustment ‘ peg 104 fitted in the bore 96. The nuts are thenthreaded on the studs and turned tightly down against; the adjustment plate. 7 i

The sprocket is then fitted over the drive shaft 55 andv onto the mounting portion 59, the wedge 111 driven into place, the washer placed on the shaft, and the nut 116 threaded onto the end 60 of the: shaft. The saw chain is then placed around thesprocket 110 and the cutter bar 90 so that the links 121 are in mesh with the sprocketand the guides 123are fittedin the groove 99. For this purpose the adjustment rod 103 is rotated to move the cutter bar toward the- drive shaft 55. The peg 104 received in the bore 96 of the bar moves along the rod and in turn slides the cutter bar onthe” outer boss 86. This movement is accommodated’and guided by the studs 87 received by the slot 95. After.

during It will be understood from the foregoing that a highly eflective attachment for mounting saw chains on a circular saw in place of the circular saw blade thereof has been provided. The attachment obviates the need for having a separate circular saw and chain saw inasmuch as the same housing and motor may be employed for both types of blades. The advantages of economy and convenience make the attachment of the present invention a highly satisfactory and practical solution to the problem of dual use of hand saws of the type described.

Best Gas Pole Saw 2023

Although the invention has been herein shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent devices and apparatus.

In a manually operable, portable power driven circular saw including a housing having an end; a motor mounted within the housing; a saw blade mounting shaft having driven connection to the motor and having an end extended from said end of the housing; a substantially semi-circular, transversely U-shaped guard having an inner flange mounted on said end of the housing and an outer flange in outwardly spaced relation to the inner flange, the flanges defining a saw blade receiving channel therebetween, said shaft being extended outwardly from the inner flange and being adapted to receive a circular saw blade thereon with a portion of said blade disposed within the channel of the guard and a portion extended from the guard for workpiece engagement; a drive sprocket mounted on the shaft for rotation therewith in a plane between the flanges of the guard; an elongated bar having a peripheral edge providing an edgewardly disposed groove; a mounting block borne by the housing adjacent to the shaft having an edge radially extended from the shaft, said mounting block having a forward portion in spaced relation to the housing and to the guard and having an oppositely disposed edge adjacent to the shaft and providing an outwardly disposed side inwardly spaced from the extended end of the shaft; spacing means between the forward portion of the block and the bar; screw-threaded fastening means releasably securing the block and the bar on the housing with the peripheral groove of the bar disposed in a plane normal to the shaft, disposed between the flanges of the guard, and transversely intersecting the sprocket; and a saw chain extended around the sprocket and the edge of the bar for circuitous travel around the bar incident to rotation of the sprocket.

A device as set forth in claim 1 in which the block is releasably rigidly secured to the housing, the spacing means is in the form of a boss rigid with the block and provides an outwardly disposed flat bar engaging surface, and the bar is mounted on the block for longitudinal adjustable movement engaged flatly against said surface of the spacing means.

A device as set forth in claim 1 in which the outer flange of the guard terminates in an arcuate edge radially outwardly spaced from the shaft and said oppositely disposed edge of the block adjacent to the shaft is spaced from the shaft a distance less than the radial spacing of the arcuate edge of the outer flange from the shaft.

In a manually operable, portable power driven circular saw including a housing having an open end; a channel-shaped semi-circular saw guard having an inner mounting flange secured to the housing and substantially covering the open end thereof, the inner flange having a central opening eccentrically communicating with the open end of the housing and terminating a a substantially diametrically extended edge, an outer flange in spaced parallel relation to the inner flange terminating in an arcuate edge radially outwardly spaced from the opening in the inner flange ad from the diametric edge, and an arcuate peripheral portion rigidly interconnecting the inner and outer flanges in spaced relation to said opening; a motor mounted in the housing having a main drive shaft within the open end of the housing; an auxiliary drive shaft in spaced parallel relation to the main drive shaft having an inner end journaled in the housing in driven connection with the main drive shaft, an outer end extended from the housing through said opening in the inner flange providing a mounting portion substantially midway between said flanges adapted to mount a circular saw blade thereon with a portion of such blade disposed between the inner and outer flanges of the guard in adjacent peripherally spaced relation to said peripheral portion of the guard and with the remainder of said blade outwardly extended from the diametric edge of the saw guard and housing; an elongated mounting block having inner and outer sides, the inner side being disposed toward the inner flange of the guard and the outer side being spaced inwardly from the extended end of the auxiliary shaft, a forward edge extended substantially radially from the auxiliary shaft, a rearward edge adjacent to the auxiliary shaft, laterally disposed edges on opposite sides of the auxiliary shaft, and an outer boss outwardly extended from the outer side of the block adjacent to the forward edge thereof and in radially spaced relation to the auxiliary shaft; means releasably rigidly mounting the block on the housing; a drive sprocket mounted on the mounting portion of the auxiliary shaft for rotation therewith in a plane normal to the shaft intermediate the inner and outer flanges; an elongated cutter bar having a peripheral edge, an edgewardly disposed groove, forward and rearward ends, inner and outer sides and an elongated slot extended longitudinally of the rearward end of the bar; screw-threaded stud means extended through the slot of the bar and releasably interconnecting the bar and the block for slidable adjustable movement of the bar substantially radially of the auxiliary shaft and holding the bar against the outer boss of the block which serves to position the bar with the peripheral groove thereof in substantially the same plane as the sprocket; and a saw chain extended around the sprocket and the edge of the bar for circuitous travel around the bar incident to rotation of the sprocket.

In a manually operable, portable, power driven circular saw including an elongated substantially cylindrical wall having an open end; a channel-shaped circular saw guard having an inner substantially semi-circular mounting flange secured to said wall so as substantially to cover the open end thereof and having a central opening eccentrically communicating with the open end of the housing and terminating in a substantially diametrically extended edge, an outer flange in spaced parallel relation to the inner flange terminating in an arcuate edge radially outwardly spaced from the opening in the inner flange and from the diametric edge, and an arcuate intermediate flange rigidly interconnecting the inner and outer flanges substantially concentrically to said opening; a support secured to the inner flange and extended into the open end of the wall; a prime mover mounted in the wall having a main drive shaft extended within the open end of the wall; and an auxiliary drive shaft in spaced parallel relation to the main drive shaft, concentric to said opening, having an inner end journaled in said support and in driven connection with the main drive shaft, an outer end, a moun ing portion substantially midway between said flanges, and a bearing portion extended toward the inner end from the mounting portion, the auxiliary shaft being adapted to mount a circular saw blade intermediate the inner and outer flanges of the guard in adjacent peripherally spaced relation to said intermediate flange and outwardly extended from said diametric edge of the saw guard and the Wall and so that substantially half the saw is out of the guard at all times; the combination of an elongated substantially rectangular mounting block having inner and outer sides, an inner boss laterally protruding from the inner side and fitted in the opening in frictional engage ment with said inner flange, a bore circumscribing the bearing portion of the auxiliary shaft, a forward end radially extended from the auxiliary shaft in flush engagement with said inner flange and terminating in an arcuate transverse forward edge spaced outwardly of the saw guard and the wall, a rear transverse edge closely adjacent to 1 the auxiliary shaft, longitudinally extended edges on 0pposite sides of the auxiliary shaft, the distances between said rear edge and each of the longitudinal edges and the auxiliary shaft being less than the distance between said auxiliary shaft and the terminal edge of the outer flange 1 thereby mounting the shaft without interference of the saw guard, an outer boss outwardly extended from the outer side of the block at the forward end thereof and in radially spaced relation to the auxiliary shaft, and a pair of studs rigidly outwardly extended from the outer boss in transverse alignment with the auxiliary shaft; means extended through the block into the support rigidly releasably securing the block in the opening in the inner flange; a bearing in the bore of the block rotatably. journaling the auxiliary shaft therein; a drive sprocket fitted 2 an edgwardly disposed groove, forward and rear ends, inner and outer sides, an elongated slot extended longitudinally of the barginwardly. from “the rear end and slidably fitted on the studs so that the inner side of the bar is in flushengagement against the outer boss; means connected to the studs against the cutter bar for holding the latter in endward extension.from the mounting block, the outer boss serving to position the groove of the bar in substantially the same plane as the sprocket; a saw chain extended around the sprocket and the edge of the bar for circuitous travel around the bar incident to rotation of the sprocket; and a timber engaging toothed gripper releasably connected to the forward end of the block.

References Cited in the fileof this patent UNITED STATES PATENTS 1,618,341 Howland Feb. 22, 1927 2,348,588 Arsneau May 9, 1944 2,435,192 Arsneau V Feb. 3, 1948 2,520,875 Birchmcier Aug. 29, 1950 2,578,097 Soss Dec. 11, 1951 2,612,915 Moss Oct. 7, 1952 2,755,826 j Kiekhaefer July 24, 1956 V FOREIGN 1 PATENTS 118,817 Australia Aug. 14, 1944

US583148A 1956-05-07 1956-05-07 Chain saw attachment for portable circular saw Expired. Lifetime US2839097A ( en )