US3866320A - Guide bar adjustment for chain saw - Google Patents
Guide bar adjustment for chain saw Download PDFInfo
- Publication number
- US3866320A US3866320A US448053A US44805374A US3866320A US 3866320 A US3866320 A US 3866320A US 448053 A US448053 A US 448053A US 44805374 A US44805374 A US 44805374A US 3866320 A US3866320 A US 3866320A
- Authority
- US
- United States
- Prior art keywords
- guide bar
- screw
- chain
- chassis
- cover
- 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 - Lifetime
Links
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
- B27B17/14—Arrangements for stretching the chain saw
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/707—By endless band or chain knife
- Y10T83/7226—With means to guard the tension
- Y10T83/7239—With means to vary distance between pulley or sprocket axes
Definitions
- the tightness of the saw chain on the guide bar of a chain saw is adjustable by means of a tool-rotatable member which extends to the outside of the drive case cover and is connected through helical gears with an adjusting screw mounted in fixed location adjacent a rear end portion of the guide bar for rotation about an axis extending lengthwise of the guide bar.
- An internally threaded rider on the adjusting screw is interconnected with the guide bar so as to move the guide bar lengthwise when the rider is moved by rotation of the adjusting screw.
- the location of the rotatable member by which the adjusting screw can be rotated makes it possible to adjust the tightness of the chain on the guide bar conveniently and safely.
- the present invention relates to power driven chain saws having a saw chain running on a guide bar which extends forwardly from a chassis and particularly to convenient means for adjusting the tightness of the chain on the guide bar.
- a chain saw customarily has an elongated guide bar which is mounted on and extends forwardly from a power head or chassis including a motor.
- a cutting chain which runs on the guide bar is driven by engagement with a sprocket which is located at the rear end of the guide bar and is driven by the motor.
- the tightness of the saw chain on the guide bar needs to be adjusted so that the chain runs freely on the guide bar without excessive friction but is sufficiently tight so that it will not come off of the guide bar during operation of the saw. Adjustment is periodically required because of chain stretch caused by tension from cutting.
- Adjustment of the tightness of the cutting chain on the guide bar is effected by adjustably moving the guide bar in a lengthwise direction relative to the chassis and hence relative to the sprocket by which the chain is driven so as to vary the distance between the sprocket and the forward end of the guide bar.
- such adjustment has customarily been effected by means of an adjusting screw rotatably mounted on the chassis adjacent a rear end portion of the guide bar and having a follower or rider which is interconnected with the guide bar so that the rider and hence the guide barcan be moved in a direction longitudinal of the guide bar by rotation of the adjusting screw.
- One end of the adjusting screw is usually provided with a transverse slot to receive the bit of a screwdriver by which the screw can be turned to adjust the tightness of the chain.
- an adjusting screw for moving the guide bar of a chain saw in a lengthwise direction to adjust the tightness of the cutting chain is rotatably mounted not on the body of the chassis but inside a removable cover which encloses a rear end portion of the guide bar and the sprocket by which the chain is driven.
- the adjusting screw is rotatable'by means of a rotatable member which extends to the outside of the cover and is hence conveniently accessible to an operator.
- the rotatable member is operatively connected with the adjusting screw by means of an angle drive.
- the guide bar is customarily mounted on the chassis of a chain saw by means of two stud bolts which project laterally from the chassis and extend through an elongated longitudinal slot in a rear end portion of the guide bar.
- the same bolts may be used for securing in place a cover enclosing a rear end portion of the guide bar and the sprocket by which the cutting chain is driven.
- Nuts screwed onto the bolts are loosened so as to free the guide bar for lengthwise movement to adjust the tightness of the chain and after adjustment are tightened so as to clamp the guide bar securely in adjusted position while at the same time securing the cover.
- the rotatable member by which the adjusting screw is rotated to adjust the tightness of the chain is preferably located adjacent the nuts on the bolts by means of which the guide bar is mounted on the chassis. By reason of this location, an operator can loosen the nuts on the stud bolts, turn the rotatable member to move the guide bar in a lengthwise direction to adjust the tightness of the chain and then tighten the nuts to secure the guide bar in adjusted position without changing his position with respect to the chain saw. This makes the adjustment most convenient.
- FIG. 1 is a side view of a portion of a chain saw in accordance with the invention including a portion of the guide bar and cutting chain and a cover enclosing a rear end portion of the guide bar;
- FIG. 2 is an inside view of the cover
- FIG. 3 is a partial cross section taken approximately on the line 3-3 in FIG. I;
- FIG. 4 is a partial cross section taken at the location indicated by the line 44 in FIG. 2 but with the cover and guide bar assembled on the chassis of the chain saw.
- the chassis includes a power unit, for example an electric motor or an internal combustion engine enclosed in a suitable housing and provided with customary handles, controls and other accessories.
- a power unit for example an electric motor or an internal combustion engine enclosed in a suitable housing and provided with customary handles, controls and other accessories.
- the chassis housing is shown in the drawings. This includes a portion la provided on a side of the chassis for mounting a guide bar 2.
- the guide bar is mounted on the chassis by means of two stud bolts 3 which project laterally from the portion la of the chassis and extend through an elongated longitudinal slot in a rear end portion of the guide bar 2.
- the slot in the guide bar is of sufficient length to permit lengthwise movement of the guide bar relative to the chassis.
- the guide bar 2 is provided in its periphery with a groove to receive inwardly projecting tangs of a cutting chain 4 which is thereby guided so as to run around the periphery of the guide bar.
- the chain is shown as comprising a plurality of links 4a connected by rivets 4b. Certain of the links are provided with cutting teeth 4c and depth gauges 4d.
- a rear end portion of the guide bar I with the chain thereon is enclosed by a drive case cover 5 which is mounted on the chassis by means of the stud bolts 3 which extend through holes suitably provided in the cover and are provided with nuts 6 which are screwed onto the bolts to hold the cover 5 and the guide bar 2 in place.
- a guard plate or shim 7 is sandwiched between the guide bar 2 and the mounting portion la of the chassis and a similar but reversed guard plate or shim 8 is sandwiched between the guide bar and the cover 5.
- the chain runs over and is driven by a sprocket which in turn is driven by the power unit usually through a speed responsive clutch.
- the power unit usually through a speed responsive clutch.
- the guard plates 7 and 8 serve to guide the cutting chain as it runs onto and off of the sprocket. As viewed in FIG. 1, the lower run of the chain 4 is moving toward the sprocket while the upper run of the chain is moving toward the outer end of the guide bar.
- Adjustment of the tightness of the chain on the guide bar is effected by moving the guide bar in a lengthwise direction with respect to the chassis.
- movement of the guide bar forwardly increases the distance between the sprocket and the forward end of the guide bar, thereby tightening the chain.
- rearward movement of the guide bar with respect to the chassis loosens the chain.
- Longitudinal movement of the guide bar with respect to the chassis is effected by means of a threaded shaft 10 which is herein referred to as an adjusting screw.
- the shaft 10 is externally threaded except for cylindrical end portions 10a and 10b by means of which the shaft is mounted for rotation on the inside of the drive case cover 5.
- One end portion 10a is rotatably received in a cylindrical hole provided in an inwardly projecting portion 5a of the drive case cover while the other end portion 10b is rotatably held between a half bearing portion of the drive case cover and a complementary bearing portion of a gear cover 11 secured on the inside of the drive case cover by screws 12.
- the adjusting screw 10 is rotatably mounted adjacent a rear end portion of the guide bar 2 below the slot receiving the mounting bolts 3.
- the adjusting screw 10 is located below the bolts 3 and extends approximately from one bolt to the other.
- the axis of the adjusting screw 10 is parallel to the plane of the guide bar and extends lengthwise of the guide bar so as to be parallel withthe slot receiving the mounting' bolts 3.
- An internally threaded rider or follower nut 13 engages the threaded portion of the adjusting screw 10 so as to be moved longitudinally of the screw when the screw is rotated.
- the rider 13 is connected with the 4 that the guide bar is reversible.
- the interengagement of the lug portion of the rider 13 with the hole 2a in the guide bar provides a connection for transmitting axial movement of the rider 13 to the guide bar thereby moving it in a lengthwise direction relative to the chassis.
- the lug 13a prevents rotation of the rider.
- the adjusting screw 10 is reversibly rotatable by means of a rotatable adjusting member located in a position which is conveniently accessible to an operator.
- a rotatable adjusting member located in a position which is conveniently accessible to an operator.
- the two are interconnected by an angle gear drive. While a worm gear or other suitable angle gear drive might be used, it is preferred to use helical gears as illustrated by way of example in the drawings.
- the adjusting member comprises a rotatable member 15 having a larger cylindrical head portion 15a and a stem portion 15b of reduced diameter.
- the head portion 15a is rotatably received in an opening provided in a recessed portion 5b of the drive case cover 5 while the stem portion 15b is rotatably supported by an axially aligned hole in the gear cover 11.
- the member 15 is thereby supported for rotation about an axis which is perpendicular to the guide bar 2 and below the axis of the adjusting screw 10.
- the rotatable adjusting member 15 is operatively connected with the adjusting screw 10 by means of a helical gear 16 fixed on the stem portion 15b of the member 15 and meshing with a helical gear 17 fixed on the end portion 10b of the adjusting screw 10. By reason of this gear connection the adjusting screw 10 can be rotated by turning the rotatable adjusting member 15.
- the adjusting member 15 extends to the exterior of the drive case cover 5 and is provided with means whereby it can easily be rotated. As illustrated by way of example in FIG. 3, a transverse slot 15c is provided in the outer end of the adjusting member 15 to receive the bit of a screwdriver. Alternatively, the adjusting member 15 can be provided with a wrench head or an Allen head socket whereby it can readily be turned by means of a suitable tool.
- the adjusting member 15 and the nuts 6 are located inthe same recess 5b of the drive case cover 5 and are thereby protected.
- the location of the adjusting member as well as the nuts 6 on the outside of the drive case cover provides for convenient and safe adjustment of the tightness of the saw chain.
- the adjusting screw 10 and the gear drive are removably mounted on the inside of the drive case cover which can readily be removed from the saw merely by removing the nuts 6, these parts are easily acceptable for cleaning, lubrication or inspection.
- a chain saw having a chassis, an elongated guide bar mounted on and extending forwardly from the chassis, a saw chain running on the guide bar and a cover enclosing a rear end portion of the guide bar; means for adjustable moving the guide bar in a lengthwise direction relative to the chassis to adjust the tightness of the chain on the guide bar, comprising an elongated adjusting screw, means rotatably mounting said adjusting screw in fixed location relative to the chassis adjacent a rear end portion of the guide bar and with its longitudinal axis extending lengthwise of the guide bar, an internally threaded rider on said screw in engagement with threads thereof and movable lengthwise of the screw by rotation of the screw, means interconnecting said rider and guide bar to move the guide bar in a lengthwise direction by said rider, a first gear fixed on and rotatable with said screw, a second gear meshing with said first gear and rotatable about an axis normal to the axis of said screw, and driving means fixed with said second gear and extending to
- a chain saw, guide bar adjusting means according to claim 1, in which said means for rotating said driving means comprises means at an outer end of said driving means to receive a tool for rotating said driving means.
- guide bar adjusting means in which said cover has a recessed portion in which said drive means is located so that said drive means does not project beyond an outer surface of the cover.
- guide bar adjusting means in whichsaidmeans rotatably mounting said adjusting screw comprises means for mounting said screw on the inside of said cover.
- guide bar adjusting means having means for removably securing said cover on said chassis, said securing means comprising stud bolts on said chassis extending through an elongated slot in said guide bar and through holes in said cover, and nuts screwed on said bolts to secure the cover in place and clamp a rear end portion of the guide bar against the chassis.
- a chain saw having a chassis, an elongated guide bar mounted on and extending forwardly from the chassis, a saw chain running on the guide bar and means enclosing a rear end portion of the guide bar; means for adjustably moving the guide bar in a lengthwise direction to adjust the tightness of the chain on the guide bar, comprising an elongated adjusting screw, means rotatably mounting said adjusting screw in fixed location relative to the chassis adjacent a rear end portionof the guide bar and with its lontitudinal axis extending lengthwise of the guide bar, an internally threaded rider on said screw in engagement with threads thereof and movable lengthwise of the screw by rotation of the screw, means interconnecting said rider and guide bar to move the guide bar in a lengthwise direction by said rider, means for releasably clamping said guide bar in fixed adjusted position on the chassis, drive means for rotating said adjusting screw, means rotatably mounting said drive means in a location conveniently accessible to an operator with its axis of rotation at
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US448053A US3866320A (en) | 1974-03-04 | 1974-03-04 | Guide bar adjustment for chain saw |
GB857875A GB1441910A (en) | 1974-03-04 | 1975-02-28 | Guide bar adjustment for chain saw |
CA221,107A CA1004574A (en) | 1974-03-04 | 1975-03-03 | Guide bar adjustment for chain saw |
SE7502362A SE7502362L (it) | 1974-03-04 | 1975-03-03 | |
NO750703*[A NO750703L (it) | 1974-03-04 | 1975-03-03 | |
DE19752509194 DE2509194A1 (de) | 1974-03-04 | 1975-03-03 | Kettensaege mit kettenspannvorrichtung |
BR1294/75A BR7501294A (pt) | 1974-03-04 | 1975-03-04 | Serra de cadeia e meios de ajustagem da barra de guia |
IT20888/75A IT1033392B (it) | 1974-03-04 | 1975-03-04 | Dispositivo di regolazione di una guida di scorrimento per segna a catena |
JP50025702A JPS5214478B2 (it) | 1974-03-04 | 1975-03-04 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US448053A US3866320A (en) | 1974-03-04 | 1974-03-04 | Guide bar adjustment for chain saw |
Publications (1)
Publication Number | Publication Date |
---|---|
US3866320A true US3866320A (en) | 1975-02-18 |
Family
ID=23778822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US448053A Expired - Lifetime US3866320A (en) | 1974-03-04 | 1974-03-04 | Guide bar adjustment for chain saw |
Country Status (9)
Country | Link |
---|---|
US (1) | US3866320A (it) |
JP (1) | JPS5214478B2 (it) |
BR (1) | BR7501294A (it) |
CA (1) | CA1004574A (it) |
DE (1) | DE2509194A1 (it) |
GB (1) | GB1441910A (it) |
IT (1) | IT1033392B (it) |
NO (1) | NO750703L (it) |
SE (1) | SE7502362L (it) |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4129943A (en) * | 1977-11-25 | 1978-12-19 | Bricker Norman C | Chain saw bar tightener |
US4315370A (en) * | 1979-07-13 | 1982-02-16 | Black & Decker Inc. | Combined saw chain tension adjuster and saw chain guard |
FR2539348A1 (fr) * | 1983-01-18 | 1984-07-20 | Stihl Andreas | Dispositif de tension de chaine pour une scie a chaine |
US4571833A (en) * | 1983-08-30 | 1986-02-25 | Kioritz Corporation | Sawdust discharge port |
US4835868A (en) * | 1986-12-17 | 1989-06-06 | Kioritz Corporation | Saw chain tensioner of chain saw |
DE3906510A1 (de) * | 1988-03-04 | 1989-09-14 | Electrolux Ab | Spannvorrichtung |
FR2640905A1 (it) * | 1988-12-23 | 1990-06-29 | Stihl Andreas | |
US5174029A (en) * | 1991-12-11 | 1992-12-29 | Jt Investments | Chain saw tensioning mechanism |
US5177871A (en) * | 1991-10-08 | 1993-01-12 | Textron Inc. | Power tool belt tension system |
US5528835A (en) * | 1994-11-29 | 1996-06-25 | Ra; Do-Jin | Chain saw tensioning apparatus |
US5709254A (en) * | 1996-06-18 | 1998-01-20 | Argue; Fletcher | Tree harvesting apparatus |
US5896670A (en) * | 1997-07-24 | 1999-04-27 | Blount, Inc. | Chain tensioner for chain saw |
DE19846555A1 (de) * | 1998-10-09 | 2000-04-13 | Dolmar Gmbh | Spannvorrichtung für eine Kette oder einen Riementrieb einer Motor getriebenen Handwerkzeugmaschine |
US6049986A (en) * | 1997-10-02 | 2000-04-18 | Blount, Inc. | Chain saw guide bar equipped with chain tensioner |
US6061915A (en) * | 1997-10-02 | 2000-05-16 | Blount, Inc. | Tightening mechanism for chain saw guide bar |
US6389700B2 (en) * | 2000-04-03 | 2002-05-21 | Joseph Gerald Ronald Paquin | Chainsaw bar guard |
DE4436300C2 (de) * | 1993-10-13 | 2002-08-01 | Electrolux Ab | Kettenspannvorrichtung für eine Kettensäge |
US6560879B2 (en) | 2001-08-02 | 2003-05-13 | Wci Outdoor Products, Inc. | Chain saw adjuster |
US6564459B1 (en) * | 1999-07-07 | 2003-05-20 | Robert Bosch Gmbh | Chain saw |
US20060196058A1 (en) * | 2005-03-01 | 2006-09-07 | Electrolux Home Products, Inc. | Chain saw with tool-less chain tensioner and guide bar lock |
US20060230900A1 (en) * | 2003-03-06 | 2006-10-19 | Aktiebolaget Electrolux | Chain saw tensioning device |
US20070062361A1 (en) * | 2005-09-16 | 2007-03-22 | Wei Xiong | Chainsaw tensioner |
US7322114B2 (en) * | 2004-07-01 | 2008-01-29 | Kioritz Corporation | Saw chain tensioning mechanism |
US20080141544A1 (en) * | 2006-12-19 | 2008-06-19 | Chia-Hsing Liao | Keyless adjusting mechanism for chain saw |
US20100088905A1 (en) * | 2007-02-26 | 2010-04-15 | Pellenc (Societe Anonyme) | Chain saw equipped with a device for adjusting the tightness of the cutting chain |
US20120066917A1 (en) * | 2009-05-20 | 2012-03-22 | Makita Corporation | Chain saw |
US8672162B2 (en) | 2009-05-20 | 2014-03-18 | Makita Corporation | Power tool including a reservoir and a cap attached to the opening of the reservoir |
CN104070562A (zh) * | 2013-03-29 | 2014-10-01 | 株式会社牧田 | 便携式作业机械 |
US8931575B2 (en) | 2009-05-20 | 2015-01-13 | Makita Corporation | Power tool |
US11343973B2 (en) * | 2018-05-23 | 2022-05-31 | Milwaukee Electric Tool Corporation | Pole saw |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53121577U (it) * | 1977-03-04 | 1978-09-27 | ||
JPS6032601A (ja) * | 1983-08-01 | 1985-02-19 | 株式会社共立 | チエンソ−安全制動装置 |
JPH01138702U (it) * | 1988-03-18 | 1989-09-21 | ||
JPH0719761Y2 (ja) * | 1988-03-18 | 1995-05-10 | 小松ゼノア株式会社 | チエンソー |
JPH02133301U (it) * | 1989-04-10 | 1990-11-06 | ||
JP5462528B2 (ja) * | 2009-05-20 | 2014-04-02 | 株式会社マキタ | チェーンソー |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2624379A (en) * | 1951-08-13 | 1953-01-06 | Floyd D Arneson | Saw bar adjustment device |
US2767746A (en) * | 1953-09-22 | 1956-10-23 | Titan Chain Saws Inc | Chain tightener for powered chain saw |
US2910099A (en) * | 1956-03-16 | 1959-10-27 | Remington Arms Co Inc | Take-up handle for chain saw |
US3194284A (en) * | 1963-06-05 | 1965-07-13 | Charles M Walker | Tension adjusting means for chain saws |
US3267973A (en) * | 1964-06-01 | 1966-08-23 | C B Tool Company | Chain saw bar adjusting device |
US3636995A (en) * | 1970-07-02 | 1972-01-25 | Textron Inc | Tensioner for saw chain |
-
1974
- 1974-03-04 US US448053A patent/US3866320A/en not_active Expired - Lifetime
-
1975
- 1975-02-28 GB GB857875A patent/GB1441910A/en not_active Expired
- 1975-03-03 DE DE19752509194 patent/DE2509194A1/de active Pending
- 1975-03-03 CA CA221,107A patent/CA1004574A/en not_active Expired
- 1975-03-03 SE SE7502362A patent/SE7502362L/xx unknown
- 1975-03-03 NO NO750703*[A patent/NO750703L/no unknown
- 1975-03-04 IT IT20888/75A patent/IT1033392B/it active
- 1975-03-04 JP JP50025702A patent/JPS5214478B2/ja not_active Expired
- 1975-03-04 BR BR1294/75A patent/BR7501294A/pt unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2624379A (en) * | 1951-08-13 | 1953-01-06 | Floyd D Arneson | Saw bar adjustment device |
US2767746A (en) * | 1953-09-22 | 1956-10-23 | Titan Chain Saws Inc | Chain tightener for powered chain saw |
US2910099A (en) * | 1956-03-16 | 1959-10-27 | Remington Arms Co Inc | Take-up handle for chain saw |
US3194284A (en) * | 1963-06-05 | 1965-07-13 | Charles M Walker | Tension adjusting means for chain saws |
US3267973A (en) * | 1964-06-01 | 1966-08-23 | C B Tool Company | Chain saw bar adjusting device |
US3636995A (en) * | 1970-07-02 | 1972-01-25 | Textron Inc | Tensioner for saw chain |
Cited By (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4129943A (en) * | 1977-11-25 | 1978-12-19 | Bricker Norman C | Chain saw bar tightener |
US4315370A (en) * | 1979-07-13 | 1982-02-16 | Black & Decker Inc. | Combined saw chain tension adjuster and saw chain guard |
FR2539348A1 (fr) * | 1983-01-18 | 1984-07-20 | Stihl Andreas | Dispositif de tension de chaine pour une scie a chaine |
US4567658A (en) * | 1983-01-18 | 1986-02-04 | Andreas Stihl | Saw chain tensioning arrangement for a chain saw |
US4571833A (en) * | 1983-08-30 | 1986-02-25 | Kioritz Corporation | Sawdust discharge port |
US4835868A (en) * | 1986-12-17 | 1989-06-06 | Kioritz Corporation | Saw chain tensioner of chain saw |
DE3906510A1 (de) * | 1988-03-04 | 1989-09-14 | Electrolux Ab | Spannvorrichtung |
US4920650A (en) * | 1988-03-04 | 1990-05-01 | Aktiebolaget Electrolux | Tension arrangement |
FR2640905A1 (it) * | 1988-12-23 | 1990-06-29 | Stihl Andreas | |
US5177871A (en) * | 1991-10-08 | 1993-01-12 | Textron Inc. | Power tool belt tension system |
US5174029A (en) * | 1991-12-11 | 1992-12-29 | Jt Investments | Chain saw tensioning mechanism |
DE4436300C2 (de) * | 1993-10-13 | 2002-08-01 | Electrolux Ab | Kettenspannvorrichtung für eine Kettensäge |
US5528835A (en) * | 1994-11-29 | 1996-06-25 | Ra; Do-Jin | Chain saw tensioning apparatus |
US5709254A (en) * | 1996-06-18 | 1998-01-20 | Argue; Fletcher | Tree harvesting apparatus |
US5896670A (en) * | 1997-07-24 | 1999-04-27 | Blount, Inc. | Chain tensioner for chain saw |
US6049986A (en) * | 1997-10-02 | 2000-04-18 | Blount, Inc. | Chain saw guide bar equipped with chain tensioner |
US6061915A (en) * | 1997-10-02 | 2000-05-16 | Blount, Inc. | Tightening mechanism for chain saw guide bar |
DE19846555A1 (de) * | 1998-10-09 | 2000-04-13 | Dolmar Gmbh | Spannvorrichtung für eine Kette oder einen Riementrieb einer Motor getriebenen Handwerkzeugmaschine |
US6296586B1 (en) | 1998-10-09 | 2001-10-02 | Dolmar Gmbh | Tensioning device for a chain or a belt drive for a motor of a hand machine tool |
US6564459B1 (en) * | 1999-07-07 | 2003-05-20 | Robert Bosch Gmbh | Chain saw |
US6389700B2 (en) * | 2000-04-03 | 2002-05-21 | Joseph Gerald Ronald Paquin | Chainsaw bar guard |
US6560879B2 (en) | 2001-08-02 | 2003-05-13 | Wci Outdoor Products, Inc. | Chain saw adjuster |
US20060230900A1 (en) * | 2003-03-06 | 2006-10-19 | Aktiebolaget Electrolux | Chain saw tensioning device |
US7322114B2 (en) * | 2004-07-01 | 2008-01-29 | Kioritz Corporation | Saw chain tensioning mechanism |
US20060196058A1 (en) * | 2005-03-01 | 2006-09-07 | Electrolux Home Products, Inc. | Chain saw with tool-less chain tensioner and guide bar lock |
US7155832B2 (en) | 2005-03-01 | 2007-01-02 | Husqvarna Outdoor Products Inc. | Chain saw with tool-less chain tensioner and guide bar lock |
US20070062361A1 (en) * | 2005-09-16 | 2007-03-22 | Wei Xiong | Chainsaw tensioner |
US20080141544A1 (en) * | 2006-12-19 | 2008-06-19 | Chia-Hsing Liao | Keyless adjusting mechanism for chain saw |
US7676934B2 (en) * | 2006-12-19 | 2010-03-16 | Hsin-Chih Chung Lee | Keyless adjusting mechanism for chain saw |
US20100088905A1 (en) * | 2007-02-26 | 2010-04-15 | Pellenc (Societe Anonyme) | Chain saw equipped with a device for adjusting the tightness of the cutting chain |
US8434236B2 (en) * | 2007-02-26 | 2013-05-07 | Pellenc (Societe Anonyme) | Chain saw with tension adjustment |
US20120066917A1 (en) * | 2009-05-20 | 2012-03-22 | Makita Corporation | Chain saw |
CN102458784A (zh) * | 2009-05-20 | 2012-05-16 | 株式会社牧田 | 链锯 |
US8495819B2 (en) * | 2009-05-20 | 2013-07-30 | Makita Corporation | Chain saw |
US8672162B2 (en) | 2009-05-20 | 2014-03-18 | Makita Corporation | Power tool including a reservoir and a cap attached to the opening of the reservoir |
CN102458784B (zh) * | 2009-05-20 | 2014-12-10 | 株式会社牧田 | 链锯 |
US8931575B2 (en) | 2009-05-20 | 2015-01-13 | Makita Corporation | Power tool |
CN104070562A (zh) * | 2013-03-29 | 2014-10-01 | 株式会社牧田 | 便携式作业机械 |
US11343973B2 (en) * | 2018-05-23 | 2022-05-31 | Milwaukee Electric Tool Corporation | Pole saw |
Also Published As
Publication number | Publication date |
---|---|
SE7502362L (it) | 1975-09-05 |
IT1033392B (it) | 1979-07-10 |
JPS50125398A (it) | 1975-10-02 |
CA1004574A (en) | 1977-02-01 |
JPS5214478B2 (it) | 1977-04-21 |
BR7501294A (pt) | 1976-11-30 |
NO750703L (it) | 1975-09-05 |
DE2509194A1 (de) | 1975-09-11 |
GB1441910A (en) | 1976-07-07 |
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