CA1140028A - Chainsaw accessory - Google Patents
Chainsaw accessoryInfo
- Publication number
- CA1140028A CA1140028A CA000354221A CA354221A CA1140028A CA 1140028 A CA1140028 A CA 1140028A CA 000354221 A CA000354221 A CA 000354221A CA 354221 A CA354221 A CA 354221A CA 1140028 A CA1140028 A CA 1140028A
- Authority
- CA
- Canada
- Prior art keywords
- chainsaw
- tube
- accessory
- tubes
- saw
- Prior art date
- 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
Links
Abstract
CHAINSAW ACCESSORY
ABSTRACT OF THE DISCLOSURE
An accessory device is provided for securement to a conventional portable type chainsaw to define a fixed predetermined distance of the cutting plane of the saw from an end of a work to be cut. With this arrangement, successive cuts of identical lengths can be rapidly made. The accessory itself comprises a plurality of straight cylindrical tubes nested in telescoping relationship and with appropriate frictional engagement with each other. With this arrangement any desired length can be defined by the extent of telescoping of the tubes and the defined lengths remain fixed as a consequence of the friction between the tubes. This fixed length can thus be used for successively measuring off equal cuts of a log or other wood to be cut by the chainsaw and the operator need not be concerned with further adjustments until such time as the successive cuts are to be changed in length.
ABSTRACT OF THE DISCLOSURE
An accessory device is provided for securement to a conventional portable type chainsaw to define a fixed predetermined distance of the cutting plane of the saw from an end of a work to be cut. With this arrangement, successive cuts of identical lengths can be rapidly made. The accessory itself comprises a plurality of straight cylindrical tubes nested in telescoping relationship and with appropriate frictional engagement with each other. With this arrangement any desired length can be defined by the extent of telescoping of the tubes and the defined lengths remain fixed as a consequence of the friction between the tubes. This fixed length can thus be used for successively measuring off equal cuts of a log or other wood to be cut by the chainsaw and the operator need not be concerned with further adjustments until such time as the successive cuts are to be changed in length.
Description
~1~0~2~ ' This invention relates generally t~ woodworking equipment and more particularly to a chai~saw accessory for use in cutting felled trees.
BACKGROU~D OF THE INVENTION
It is generally known to attach a measuring device to a chainsaw in ordex to facilitate cu~ting successively equal - lengths of wood as when chopping up a elled tree. Examples o~
such arrangements are shown in United States Patent Nos. 2,765,007;
BACKGROU~D OF THE INVENTION
It is generally known to attach a measuring device to a chainsaw in ordex to facilitate cu~ting successively equal - lengths of wood as when chopping up a elled tree. Examples o~
such arrangements are shown in United States Patent Nos. 2,765,007;
2,807,292; 3,276,490; and 3,364,580. Some of these structures include zig-zag type ~olding measuring sticks which can be expanded outwardly from the chainsaw. The problem wlth these de~ices, however, i~ ~hat unless t'he cut to be made is a precl~se integral num~ex of feet or units corresponding to the lengths of each cowpled lin~ o~ the meas-uring device, the e~kerLding end of the device will over-e~tend beyond the cut to be used as a reference point in perEorming the next cut. Thus, the use-r must examine any inch marks or ot'her measurement marks on the measure itself.
~ In order to resolve 'the foregoing problem, it has been proposed to provide a tape-like measure whi~h can be pulled out to any desired dlstance and locked in such position. However 9 in order that the tape can 'be coiled up neatly when not in use it has to be relatively th~in and for an extended length of tape, the same is not always self-supporting.
Still other solutions have involved simply attaching a fixed length member to the chainsaw which wlll de~ine a fixecl given length for successive cuts to be made. This arrangement 30 would be satisfactory i.f all wood was to be cut to a given uniform ~14~
.
length. ~o~ever, it may be desirable to provide a num~er o~
Cut5 which, while identical t'o each other, are di~erent from some other total number o~ cuts.
In an attempt to provide a collapsible and extendable 5 member, in addition to ~g-~ag measuring devices, it has been proposed to utilizé telescoping tapered tubes corresponding to fishing rod like constructions. These tubes will work satisfactorily in that they can be extended to a given distance and then easily -,retracted and in the extended position, they will hold up under ~heir own weight. The problem, however, is that intermediate - ~ixed distances can~ot ke set by such devices wherein the tapered telescopin~ tubes simply will no~ be locked together in a desi~ed intermeaiate extended position but only locked f'rictionally when fully extended.
BRIEF D~SCRIPTION OF T'HE PRESENT INVENTION
With all of t'he foregoing considerations in m~nd, the p~esent invention con~emplates a greatly improved chaLnc:aw accessory capable oE defining a given fixed distance o~ any d~esired length within reasonable limits wherein the accessory itself can readily be co'llapsed when not in use so as to be out of the way and yet when extended to any desired ~ixed position will remain frictionally in such position without buckling or otherwise collapsing inadvertently.
More particularly, in accord with this invention, the chainsaw accessory comprises a plurality o~ strai~ht cylindrical tubes of progressively decreasing diame~er so that they can be nested in telescoped relationship~ the outermost tube being ' secured to the chainsaw in position such khat the telescoped tubes can be extended in a direction normal to this plane.
~1~0~)2~ ~
The outer end opening o~ each tube from which the next successive tube extends is peened radially inwardly so that the outer wall oE suc-h next successive tube is frictionally engaged over 360 in a continuous manner regardless of the telescoped position of this next tube. In addition, the inner end opening of each tube surrounded by the ne~t larger tube is flared outwardly to frict;onally engage over 360 the inner wall of this larger tube.
With the foregoing arrangemen~, the telescoped members will remain in any desired set position so that once a glven distance is defined by the telescoping tubesr it will permi~
rapid successive cuts to ~e made by the chaînsaw, all o~ identical lengths correspondi~g to the given distan~e~ the end o-f the telescoping tu~es corresponding with the end of each cut.
BRIEF DESCRIPTION OF THE DR~WINGS
A better understanding of this invention will be 'had by now referring to t'he accompanying drawings in which:
FIGURE 1 is a perspectiv~ view illustrating the chainsaw a'nd chainsaw accessory of this invention in operatio~
FI~URE 2 is an underside plan view looking generally in the direction ~f the arrow 2-2 of FIGUP~E l; and, FIGURE 3 is a greatly enlarged ragmenkary cross section 2~ of the accessory taken in the direction o the arrows 3-3 of FIGURE 2.
..~
DETAILED DESCRIPTION OF,THE P'REFE~RED EMBODI~,NT
Referring ~irst to FIGU~E 1, there is shown a portable ~4~Z8 chainsaw 10 provided with an accessory device indicated generally by the n~eral 11, This accesso~y defines in combination wi~h a chainsaw a fixed predetermined distance D between the cutting plane P of ~he saw and one end 12 of a work to be cut~ such as a log 13. With the end of the acces~ory member 11 coinciding with the cut end 12, successive cuts can then be effected by the ,chainsaw 10 all of precisely the same length corresponding to the predetermined distance D.
It will be no~ed ~rom the foregoing tha~ such successive cuts can be made without the operator having to read an~
, measuring numerals or the like. Rather~ the operator need only be assured that the end. of the extending accessory 11 coincide with the previ.ously cut end of the work.
~e~erring now to the underside of the chainsaw and accessory illustrated in FIGU~E 2, it wlll be noted that the chainsaw ltsel~ includes ~ tu'bular 'handle 14. The end portions of the tubular 'handle 14 are normally secured to the'bod~ o the saw as by bolts. One such bolt is illustrated at 15 in FIGURE 2.
~8 will ~e eviden~ ~r'om FIGU'RE 2, the accessory devîce '11 comprises a pluraliky of straight cylinder tubes of decreasing diameters so that they can be nested in telescoped relationship.
The outermost tube is indicated at 16 in FIGURE 2 and is secured to the body o~ the chainsaw 10 by a cooperating anchor plate 17 ' and the bolt 15 for the tubular handle 14. The securing arrange-ment permits removal o~ the accessory device if desired by simply removing the bolt 15.
,' Various successively extending tubular members making up the accessory 11 are indicated at 18~.19 and 20 in FIGUP~ 2.
It is to be noted that the positioning of the outermost tube 16 in its securement to the body o:~ the chainsaw is such that the cylindrical tubular members telescopical'ly ex~end in adirection normal to the plane P o~ the chainsaw.
The manner in which the various telescopin~ ~ubes can . . . ..... .. .
be extended any desired distance and retained in such extended positions will now be evident by referring to the fragmenkary cross section o~ FIGURE 3.
As shown in FIGURE 3, the outer end opening of each tube rom which the next successive tube extends is peened radially inwardl~ such as indicated a~ 21 and 27,~ or the cylindrical tubes 19 and 20. The peening inwa~dly is such -that the outer wall of the next successive tube is frictionally engaged over 360 for any telescoped position.
The inner end opening o each tube surrounded by the next larger tube is, in turn, flared vutwardly such as indicated at 23 and 24 ~or the cylindrical'tubes 1~ and 20 respectively~
The outward flaring i5 such as to cause a ~rictional engagement over 360 o~ the inner wall o the next 'larger surround:ing tube.
The ~oregoing frictional engagemen~s assure ~ha~ any lengths to which the tubes are extended will b~ rnaintained by such rictional'engagement so that the heretofore xe~erre~ to fixed predetermined distance D can be c~anged to a dif~erent prefixed distance and the tubes retained in such positions to maintain the new distance consistently as the chainsaw is being used.
' 25 ' When it is not des;red ~o use the accessory~ all o~ the telescoping tubes can simply be telescoped inwardly to a collapsed state neatly beneath'the body of the chainsaw.
The unique telescoping arrangement in co~lbination with the chainsaw assures a su~ficient eætension to be possible without any undue sagglng or 'buckling o~ the extended'members.
~lso, an infinite num~er of pos:i-ti~ns can be achieved b~tween the ~L4C~2~
ma~imum extended position and the completely collapsed position because o~ the frictional engagement.
It will be seen from all of the oregoing, ~hat the present invention thus provides certain advantages not ava;lable in prior art devices hereto~ore prop~sed.
In operation, it will be understood that a worker will simply set the telescoped members at a desired predetermined distance. The worker himself can us~ a conventional t~pe measure ~or the initial setting so that the proper.predetermin~d distance> once set, need not again be measured.
Successive lengths o~ a- log of a felled tree can thus be cut each length being precisely the same and corresponding to the set predetermined distance.
If a new predetermined distance is to be utilized defirling 15 the lengths of wood to be cut~ a resetting is readily accomplished by telescoping the tubes inwardl~ or outwardly as xecluirecl.
Again, as mentioned heretoore~ the set position will alway~ ~e maintained because o the Erictional enga~ement betwéen the cylindrical tu~e ends.
~ In order to resolve 'the foregoing problem, it has been proposed to provide a tape-like measure whi~h can be pulled out to any desired dlstance and locked in such position. However 9 in order that the tape can 'be coiled up neatly when not in use it has to be relatively th~in and for an extended length of tape, the same is not always self-supporting.
Still other solutions have involved simply attaching a fixed length member to the chainsaw which wlll de~ine a fixecl given length for successive cuts to be made. This arrangement 30 would be satisfactory i.f all wood was to be cut to a given uniform ~14~
.
length. ~o~ever, it may be desirable to provide a num~er o~
Cut5 which, while identical t'o each other, are di~erent from some other total number o~ cuts.
In an attempt to provide a collapsible and extendable 5 member, in addition to ~g-~ag measuring devices, it has been proposed to utilizé telescoping tapered tubes corresponding to fishing rod like constructions. These tubes will work satisfactorily in that they can be extended to a given distance and then easily -,retracted and in the extended position, they will hold up under ~heir own weight. The problem, however, is that intermediate - ~ixed distances can~ot ke set by such devices wherein the tapered telescopin~ tubes simply will no~ be locked together in a desi~ed intermeaiate extended position but only locked f'rictionally when fully extended.
BRIEF D~SCRIPTION OF T'HE PRESENT INVENTION
With all of t'he foregoing considerations in m~nd, the p~esent invention con~emplates a greatly improved chaLnc:aw accessory capable oE defining a given fixed distance o~ any d~esired length within reasonable limits wherein the accessory itself can readily be co'llapsed when not in use so as to be out of the way and yet when extended to any desired ~ixed position will remain frictionally in such position without buckling or otherwise collapsing inadvertently.
More particularly, in accord with this invention, the chainsaw accessory comprises a plurality o~ strai~ht cylindrical tubes of progressively decreasing diame~er so that they can be nested in telescoped relationship~ the outermost tube being ' secured to the chainsaw in position such khat the telescoped tubes can be extended in a direction normal to this plane.
~1~0~)2~ ~
The outer end opening o~ each tube from which the next successive tube extends is peened radially inwardly so that the outer wall oE suc-h next successive tube is frictionally engaged over 360 in a continuous manner regardless of the telescoped position of this next tube. In addition, the inner end opening of each tube surrounded by the ne~t larger tube is flared outwardly to frict;onally engage over 360 the inner wall of this larger tube.
With the foregoing arrangemen~, the telescoped members will remain in any desired set position so that once a glven distance is defined by the telescoping tubesr it will permi~
rapid successive cuts to ~e made by the chaînsaw, all o~ identical lengths correspondi~g to the given distan~e~ the end o-f the telescoping tu~es corresponding with the end of each cut.
BRIEF DESCRIPTION OF THE DR~WINGS
A better understanding of this invention will be 'had by now referring to t'he accompanying drawings in which:
FIGURE 1 is a perspectiv~ view illustrating the chainsaw a'nd chainsaw accessory of this invention in operatio~
FI~URE 2 is an underside plan view looking generally in the direction ~f the arrow 2-2 of FIGUP~E l; and, FIGURE 3 is a greatly enlarged ragmenkary cross section 2~ of the accessory taken in the direction o the arrows 3-3 of FIGURE 2.
..~
DETAILED DESCRIPTION OF,THE P'REFE~RED EMBODI~,NT
Referring ~irst to FIGU~E 1, there is shown a portable ~4~Z8 chainsaw 10 provided with an accessory device indicated generally by the n~eral 11, This accesso~y defines in combination wi~h a chainsaw a fixed predetermined distance D between the cutting plane P of ~he saw and one end 12 of a work to be cut~ such as a log 13. With the end of the acces~ory member 11 coinciding with the cut end 12, successive cuts can then be effected by the ,chainsaw 10 all of precisely the same length corresponding to the predetermined distance D.
It will be no~ed ~rom the foregoing tha~ such successive cuts can be made without the operator having to read an~
, measuring numerals or the like. Rather~ the operator need only be assured that the end. of the extending accessory 11 coincide with the previ.ously cut end of the work.
~e~erring now to the underside of the chainsaw and accessory illustrated in FIGU~E 2, it wlll be noted that the chainsaw ltsel~ includes ~ tu'bular 'handle 14. The end portions of the tubular 'handle 14 are normally secured to the'bod~ o the saw as by bolts. One such bolt is illustrated at 15 in FIGURE 2.
~8 will ~e eviden~ ~r'om FIGU'RE 2, the accessory devîce '11 comprises a pluraliky of straight cylinder tubes of decreasing diameters so that they can be nested in telescoped relationship.
The outermost tube is indicated at 16 in FIGURE 2 and is secured to the body o~ the chainsaw 10 by a cooperating anchor plate 17 ' and the bolt 15 for the tubular handle 14. The securing arrange-ment permits removal o~ the accessory device if desired by simply removing the bolt 15.
,' Various successively extending tubular members making up the accessory 11 are indicated at 18~.19 and 20 in FIGUP~ 2.
It is to be noted that the positioning of the outermost tube 16 in its securement to the body o:~ the chainsaw is such that the cylindrical tubular members telescopical'ly ex~end in adirection normal to the plane P o~ the chainsaw.
The manner in which the various telescopin~ ~ubes can . . . ..... .. .
be extended any desired distance and retained in such extended positions will now be evident by referring to the fragmenkary cross section o~ FIGURE 3.
As shown in FIGURE 3, the outer end opening of each tube rom which the next successive tube extends is peened radially inwardl~ such as indicated a~ 21 and 27,~ or the cylindrical tubes 19 and 20. The peening inwa~dly is such -that the outer wall of the next successive tube is frictionally engaged over 360 for any telescoped position.
The inner end opening o each tube surrounded by the next larger tube is, in turn, flared vutwardly such as indicated at 23 and 24 ~or the cylindrical'tubes 1~ and 20 respectively~
The outward flaring i5 such as to cause a ~rictional engagement over 360 o~ the inner wall o the next 'larger surround:ing tube.
The ~oregoing frictional engagemen~s assure ~ha~ any lengths to which the tubes are extended will b~ rnaintained by such rictional'engagement so that the heretofore xe~erre~ to fixed predetermined distance D can be c~anged to a dif~erent prefixed distance and the tubes retained in such positions to maintain the new distance consistently as the chainsaw is being used.
' 25 ' When it is not des;red ~o use the accessory~ all o~ the telescoping tubes can simply be telescoped inwardly to a collapsed state neatly beneath'the body of the chainsaw.
The unique telescoping arrangement in co~lbination with the chainsaw assures a su~ficient eætension to be possible without any undue sagglng or 'buckling o~ the extended'members.
~lso, an infinite num~er of pos:i-ti~ns can be achieved b~tween the ~L4C~2~
ma~imum extended position and the completely collapsed position because o~ the frictional engagement.
It will be seen from all of the oregoing, ~hat the present invention thus provides certain advantages not ava;lable in prior art devices hereto~ore prop~sed.
In operation, it will be understood that a worker will simply set the telescoped members at a desired predetermined distance. The worker himself can us~ a conventional t~pe measure ~or the initial setting so that the proper.predetermin~d distance> once set, need not again be measured.
Successive lengths o~ a- log of a felled tree can thus be cut each length being precisely the same and corresponding to the set predetermined distance.
If a new predetermined distance is to be utilized defirling 15 the lengths of wood to be cut~ a resetting is readily accomplished by telescoping the tubes inwardl~ or outwardly as xecluirecl.
Again, as mentioned heretoore~ the set position will alway~ ~e maintained because o the Erictional enga~ement betwéen the cylindrical tu~e ends.
Claims (2)
1. A chainsaw accessory for use in combination with a portable chain saw to define a fixed pre-determined distance of the cutting plane of said saw from an end of work to be cut so that successive cuts of identical lengths can be rapidly made, said accessory comprising a plurality of straight cylindrical tubes of progressively decreasing diameter so that they can be nested in telescoped relationship, the outermost tube being secured to said chain saw in a position such that the telescoped tubes can be extended in a direction normal to said plane, the outer opening end of each tube from which the next successive tube extends being peened radially inwardly so that the outer end of said next successive tube is frictional engaged over 360°, the inner end opening of each tube surrounded by the next larger tube being flared outwardly to frictionally engage over 360° the inner wall of said larger tube, whereby any length to which the tubes are extended will be maintained by said frictional engagement of the tubes so that said fixed predetermined distance can be changed and retained in the changed position.
2. A chainsaw accessory according to claim 1, in which said chainsaw has a tubular handle with end portions of the tubular handle being secured by bolts to the body of the saw, and in which securement of said outermost tube of said accessory to said chain saw is effected by the same bolt used to secure one end of said tubular handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000354221A CA1140028A (en) | 1980-06-17 | 1980-06-17 | Chainsaw accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000354221A CA1140028A (en) | 1980-06-17 | 1980-06-17 | Chainsaw accessory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1140028A true CA1140028A (en) | 1983-01-25 |
Family
ID=4117203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000354221A Expired CA1140028A (en) | 1980-06-17 | 1980-06-17 | Chainsaw accessory |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1140028A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112976170A (en) * | 2021-03-15 | 2021-06-18 | 汪子友 | Adjustable high-efficient electric saw |
-
1980
- 1980-06-17 CA CA000354221A patent/CA1140028A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112976170A (en) * | 2021-03-15 | 2021-06-18 | 汪子友 | Adjustable high-efficient electric saw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |