US3730239A - Circular saw with improved movable guard construction - Google Patents
Circular saw with improved movable guard construction Download PDFInfo
- Publication number
- US3730239A US3730239A US00206639A US3730239DA US3730239A US 3730239 A US3730239 A US 3730239A US 00206639 A US00206639 A US 00206639A US 3730239D A US3730239D A US 3730239DA US 3730239 A US3730239 A US 3730239A
- Authority
- US
- United States
- Prior art keywords
- blade guard
- lower blade
- base plate
- abutment formation
- adjacent
- 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
- 238000010276 construction Methods 0.000 title description 4
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000005755 formation reaction Methods 0.000 description 22
- 241000272470 Circus Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- B27B9/00—Portable power-driven circular saws for manual operation
- B27B9/02—Arrangements for adjusting the cutting depth or the amount of tilting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
- B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
- B27G19/04—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws for manually-operated power-driven circular saws
Definitions
- the adjustably mounted base plate carries a first abutment formation adjacent the trailing end of the slot which is formed therein to receive the circular saw blade.
- the lower blade guard has a second abutment formation thereon adjacent its work-engaging forward end. The second abutment formation is brought into abutting engagement with the first abutment formation upon movement of the lower blade guard toward its open position whereby the lower blade guard exposes only the blade teeth which extend through the slot in the base. plate irrespective of the angular disposition of the latter.
- a manually operated retracting mechanism for the lower blade guard includes linkage operated by a handle mounted on the side of the fixed blade guard which is adjacent the tool motor.
- the field of the invention relates to portable, power operated circular saws. More particularly, the invention relates to new and improved mechanism for the retractable lower blade guard of such a saw.
- a circular saw with an adjustable base plate.
- Such base plate is pivotally connected at its forward end to the saw housing for swinging movement about an axis parallel with the axis of rotation of the blade mounting shaft.
- the base plate may be adjustably mounted in any desired position between a so-called normal position and a position inclined with respect thereto.
- a circular saw of this type has a lower or movable blade guard which, in the closedposition thereof, cooperates with an upper or fixed blade guard to enclose substantially all of the teeth on the circular blade.
- Circular saws of this type have been provided with manually operated retracting mechanisms for the lower blade guard. Many of such retracting mechanisms can be operated only by placing of the users fingers in the approximate vicinity of the saw blade, thereby presenting a hazardous situation.
- a primary object of the present invention is the provision of a portable, power operated circular saw of the type described, which saw embodies new and improved safety features.
- Another object of the present invention is the provision of a circular saw of the type described having cooperating abutment means on the base plate and lower blade guard so that irrespective of the position of the base plate the only teeth on the circular blade which are exposed are those extending through and beneath the slot in the base plate.
- Still another object of the present invention is the provision of a circular saw of the type described having a retracting mechanism for the lower blade guard which embodies safety features, one such feature residing in the location of the operating lever of the retracting mechanism in an area quite remote from the exposed portion of the saw blade.
- FIG. 1 is a perspective view of a circular saw embodying the present invention
- FIG. 2 is an enlarged side elevational view of the saw of FIG. 1, with certain parts being broken away for better illustration of the invention
- FIG. 3 is an enlarged, fragmentary view of the adjustment arm mounted on the base plate, which arm inturn mounts one of the abutment formations;
- FIG. 4 is a section taken along the line 4-4 of FIG. 2, all parts being shown in broken lines except for the lower blade guard retracting mechanism;
- FIG. 5 is a side elevational view of the circular saw as seen from the side opposite the side shown in FIG. 2;
- FIG. 6 is an enlarged, fragmentary perspective view of the forward end of the lower blade guard showing the other abutment formation.
- a portable, power operated circular saw generally designated10, which embodies the present invention, includes a frame or housing 11 having a fixed upper blade guard defined by a generally semicircular plate 12, an integral arcuate web 13 and an integral generally semiannular flange 15. This plate, web and flange cooperate to enclose the teeth on the upper portion of a circular saw blade 16.
- the frame supports the usual handle 18.
- the housing also defines a space 19 receiving; an electric motor 20 of suitable construction, such motor including a shaft 21 having teeth at the outer end thereof in engagement with the teeth on a gear 22.
- This gear is mounted on a ship with the blade mounting shaft 23 therebymount ing the base plate for swinging movement back and forth between a normal position, shown in solid linesin FIG. 2, and an inclined position shown in broken lines in that figure of the drawings.
- the base plate 25 includes an elongated slot 28 for I receiving a portion of the circular blade l6 therethrough.
- the base plate also includes an upstanding bracket 29 adjacent the trailing end of the slot 28, which bracket is pivotally engaged, as by means of a pin 30, to an adjustment arm 31.
- the adjustment arm includes an arcuate slot 32slidablyreceiving the stem .of an adjustment fastener 34, such fastener including an operating lever 35.
- the lever 35 is operated to control frictional engagement between the fastener 34 and the arm 31 thereby releasably to secure the base plate in either the normal or inclined positions shown or in any selected position therebetween to achieve the desired depth ,of cut;
- the base plate is also mounted by adjustment means (not shown) for pivoting movement about its longitudinal axis to perform bevel sawmg. V
- a lower blade guard generally designated 37, includes a plate 38 having a circular opening receiving a bearing ring 39, the latter being concentric with the blade mounting shaft 23 and mounting the lower blade guard 37 for rotation about such shaft.
- the lower blade guard includes an arcuate web 40 integral with the plate 38 and an arcuately extending flange 41 which in turn is integral with the web 40.
- the lower blade guard 37 is illustrated in the closed position thereof in FIG. 2 with the rearward portion thereof being nested within the rearward portion of the t upper blade guard. in such closed position, the lower blade guard cooperates with the upper blade guard to enclose substantially all of the teeth on the circular blade 16 only a few teeth between the base plate 25 (when the same is in its normal position) and the work engaging or forward end 42 of the lower blade guard are exposed.
- An abutment formation 44 is welded or otherwise secured to the adjustment arm 31 as best illustrated in FIG. 3.
- Another abutment formation 45 is integrally formed on the plate 38 of the lower blade guard adjacent the forward end 42 of the latter. These abutment formations are arranged such that the formation 45 will be brought into abutting engagement with the formation 44 during movement (clockwise as seen in FIG. 2) of the lower blade guard 37 from its closed position toward its open or retracted position. This engagement between the abutment formations prevents furthe; movement of the lower blade guard toward its open position.
- a manually operated retracting mechanism for the lower blade guard includes an operating lever 47 pivotally mounted to the plate 12 of the upper blade guard, as by means of a pin 48. It is noted that this operating lever is mounted on the side of the upper blade guard which is adjacent the housing 11 enclosing the motor 20. The distal end of this lever includes a finger engaging portion 49.
- a first link 50 has one end thereof secured to the pin 48 for movement in unison with the operating lever 47.
- the link 50 which is disposed within the upper blade guard, has the other end thereof pivotally connected, as by means of a pin 52, to one end of another link 53.
- the link 53 has the other end thereof pivotally engaged with the lower blade guard 37, as by means of a pin 54.
- a spring 55 has one end thereof engaged with the plate 38 of the lower blade guard and the other end thereof connected to the plate 12 of the upper blade guard; the spring 55 acts to urge the lower blade guard 37 in a counterclockwise direction (FIG. 2) to the closed position illustrated in that figure.
- a stop 56 is mounted on the plate 12 of the upper blade guard to limit movement of the operating lever 47 and thereby prevent possible bending or jamming of the links 50, 53 during return movement of the operating lever 47. Since the operating lever is positioned in remote relationship from the portion of the circular blade which is exposed to contact the work, there is little or no danger of the operators hand coming into engagement with the saw teeth when operating the retracting mechanism. As is conventional in the art, a pin 57 is provided on the lower blade guard as an alternate means for retracting the same.
- a portable, power operated circular saw of the type having a powered blade mounting shaft and a frame including a fixed blade guard adapted to enclose the teeth on the upper portion of a circular blade mounted on said shaft, a base plate having an elongated slot for receiving a portion of the circular blade therethrough, pivot means securing said base plate to said frame adjacent the leading end of the former for pivoting movement about an axis parallel with the axis of rotation of said shaft back and forth between a normal position and an inclined position, and adjustment means for securing said base plate in said positions and in any location therebetween, the improvement comprising:
- a lower blade guard mounted on said frame for swinging movement back and forth between a closed position and an open position, which lower blade guard in the closed position thereof cooperates with said upper blade guard to enclose substantially all of the teeth on the blade;
- said lower blade guard having a work engaging forward end and a second abutment formation thereon which is adjacent said forward end, said second abutment formation being brought into abutting engagement with said first abutment formation upon movement of said lower blade guard from the closed position thereof toward the open position thereof whereby the lower blade guard exposes only the blade teeth which extend through said slot and beneath said base plate irrespective of the location of the base plate between said positions thereof.
- said adjustment means including an adjustment arm mounted on said base plate adjacent the trailing end of said slot, said first abutment formation being integral with said arm;
- biasing means engaged with said frame and said lower blade guard for urging the latter toward said closed position thereof.
- said connecting means includes a pair of links, one link being secured at one end thereof to said lever for movement in unison with the latter, the other link having one of its ends pivotally connected with the other end of said one link and having its other end pivotally con- 0
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Knives (AREA)
- Sawing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20663971A | 1971-12-10 | 1971-12-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3730239A true US3730239A (en) | 1973-05-01 |
Family
ID=22767291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00206639A Expired - Lifetime US3730239A (en) | 1971-12-10 | 1971-12-10 | Circular saw with improved movable guard construction |
Country Status (8)
Country | Link |
---|---|
US (1) | US3730239A (de) |
JP (1) | JPS5544687B2 (de) |
AU (1) | AU460017B2 (de) |
CA (1) | CA957595A (de) |
CH (1) | CH553041A (de) |
DE (1) | DE2248512A1 (de) |
FR (1) | FR2164144A5 (de) |
NL (1) | NL7213446A (de) |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3787973A (en) * | 1972-12-15 | 1974-01-29 | Skil Corp | Safety retracting mechanism for the lower guard of a portable saw |
US4490909A (en) * | 1982-11-26 | 1985-01-01 | The E. H. Wachs Company | Travelling pipe cutter |
US4856394A (en) * | 1988-04-14 | 1989-08-15 | Porter-Cable Corporation | Portable circular saw |
EP0459121A2 (de) * | 1990-05-30 | 1991-12-04 | Robert Bosch Gmbh | Führungsschlitten für eine handgeführte Werkzeugmaschine |
US5075976A (en) * | 1991-02-05 | 1991-12-31 | Young Peter W | Power tool guard retainer |
DE4124234A1 (de) * | 1991-07-22 | 1993-01-28 | Bosch Gmbh Robert | Handkreissaege und saegeverfahren |
US5370025A (en) * | 1992-08-13 | 1994-12-06 | Milwaukee Electric Tool Corporation | Motorized saw with movable blade guard actuating linkage |
US5832614A (en) * | 1997-05-20 | 1998-11-10 | S-B Power Tool Company | Remote lower guard lift lever mechanism for circular saws |
US6161293A (en) * | 1998-08-14 | 2000-12-19 | One World Technologies, Inc. | Battery powered circular saw |
US6304058B2 (en) | 1998-08-13 | 2001-10-16 | Black & Decker Inc. | Cordless power tool system |
US6329788B1 (en) | 1998-08-13 | 2001-12-11 | Black & Decker Inc. | Cordless power tool system |
US20020157265A1 (en) * | 2001-04-26 | 2002-10-31 | Makita Corporation | Circular saw with an improved lower blade guard |
USD487385S1 (en) | 2002-06-07 | 2004-03-09 | Black & Decker Inc. | Circular saw handle |
US6735875B1 (en) * | 2002-05-22 | 2004-05-18 | At&T Corp. | Tool for removing duct surrounding a fiber optic cable |
US20040157541A1 (en) * | 2001-06-29 | 2004-08-12 | Dieter Wendt | Protective device for a hand machine tool |
US6898854B2 (en) | 2002-06-07 | 2005-05-31 | Black & Decker Inc. | Modular power tool |
US7020970B1 (en) * | 2001-10-23 | 2006-04-04 | James Welch | Saw guard system |
US20070022852A1 (en) * | 2005-09-09 | 2007-02-01 | Tracy Jack R | Retractor for circular saw lower safety-guard |
US7310879B1 (en) | 2006-07-27 | 2007-12-25 | Robert Bosch Gmbh | Cutting attachment having an adjustable foot for rotary hand tools |
US20080022537A1 (en) * | 2006-07-27 | 2008-01-31 | Credo Technology Corporation | Cutting attachment with a removable cover for rotary hand tools |
US20080078090A1 (en) * | 2006-05-19 | 2008-04-03 | Johnson Charles E Iii | Manual Saw Guard Retracting Device |
US20080305387A1 (en) * | 2007-06-11 | 2008-12-11 | Black & Decker Inc. | Cordless power tool system |
US20110099819A1 (en) * | 2009-11-04 | 2011-05-05 | John Michael Orlowski | Safety Guard for Power Saw |
US20130185947A1 (en) * | 2011-09-01 | 2013-07-25 | Robert Bosch Gmbh | Brushless dc motor-driven power device |
CN104029181A (zh) * | 2013-03-04 | 2014-09-10 | 罗伯特·博世有限公司 | 手工工具机 |
US9009982B1 (en) * | 2012-03-29 | 2015-04-21 | Simon J. Sedgwick | Dustless drywall cutting tool |
US10875109B1 (en) | 2018-04-30 | 2020-12-29 | Kreg Enterprises, Inc. | Adaptive cutting system |
CN112368097A (zh) * | 2018-07-02 | 2021-02-12 | 胡斯华纳有限公司 | 用于动力工具的保护布置结构 |
US11364652B2 (en) * | 2019-09-03 | 2022-06-21 | Makita Corporation | Portable cutting machine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0634897Y2 (ja) * | 1987-01-12 | 1994-09-14 | リョービ株式会社 | テーブルソーのロアーガード装置 |
DE3912307A1 (de) * | 1989-04-14 | 1990-10-25 | Metabowerke Kg | Kreissaege mit spaltkeil |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2963056A (en) * | 1958-06-05 | 1960-12-06 | Vernon W Rickford | Electric saw safety guard retractor |
US3441067A (en) * | 1965-10-22 | 1969-04-29 | Fred A Forcier | Mechanical guard lifter |
-
1971
- 1971-12-10 US US00206639A patent/US3730239A/en not_active Expired - Lifetime
-
1972
- 1972-08-17 CA CA149,611A patent/CA957595A/en not_active Expired
- 1972-08-17 AU AU45695/72A patent/AU460017B2/en not_active Expired
- 1972-09-14 CH CH1343372A patent/CH553041A/fr not_active IP Right Cessation
- 1972-10-03 DE DE19722248512 patent/DE2248512A1/de active Pending
- 1972-10-04 NL NL7213446A patent/NL7213446A/xx unknown
- 1972-10-16 FR FR7236554A patent/FR2164144A5/fr not_active Expired
- 1972-11-16 JP JP11437272A patent/JPS5544687B2/ja not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2963056A (en) * | 1958-06-05 | 1960-12-06 | Vernon W Rickford | Electric saw safety guard retractor |
US3441067A (en) * | 1965-10-22 | 1969-04-29 | Fred A Forcier | Mechanical guard lifter |
Cited By (55)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3787973A (en) * | 1972-12-15 | 1974-01-29 | Skil Corp | Safety retracting mechanism for the lower guard of a portable saw |
US4490909A (en) * | 1982-11-26 | 1985-01-01 | The E. H. Wachs Company | Travelling pipe cutter |
US4856394A (en) * | 1988-04-14 | 1989-08-15 | Porter-Cable Corporation | Portable circular saw |
EP0459121A2 (de) * | 1990-05-30 | 1991-12-04 | Robert Bosch Gmbh | Führungsschlitten für eine handgeführte Werkzeugmaschine |
EP0459121A3 (en) * | 1990-05-30 | 1992-05-20 | Robert Bosch Gmbh | Sliding guide for handheld machine tool |
US5075976A (en) * | 1991-02-05 | 1991-12-31 | Young Peter W | Power tool guard retainer |
DE4124234A1 (de) * | 1991-07-22 | 1993-01-28 | Bosch Gmbh Robert | Handkreissaege und saegeverfahren |
US5370025A (en) * | 1992-08-13 | 1994-12-06 | Milwaukee Electric Tool Corporation | Motorized saw with movable blade guard actuating linkage |
US5832614A (en) * | 1997-05-20 | 1998-11-10 | S-B Power Tool Company | Remote lower guard lift lever mechanism for circular saws |
US6304058B2 (en) | 1998-08-13 | 2001-10-16 | Black & Decker Inc. | Cordless power tool system |
US7005831B2 (en) | 1998-08-13 | 2006-02-28 | Black & Decker Inc. | Cordless power tool system utilizing battery pack connection system with guide rails and guide slots |
US6329788B1 (en) | 1998-08-13 | 2001-12-11 | Black & Decker Inc. | Cordless power tool system |
US7598705B2 (en) | 1998-08-13 | 2009-10-06 | Black & Decker Inc. | Cordless power tool system having cordless power tool and battery pack that employ cooperating rails and grooves for connection of battery pack to cordless power tool |
US6653815B2 (en) | 1998-08-13 | 2003-11-25 | Black & Decker Inc. | Cordless power tool system |
US20080284373A1 (en) * | 1998-08-13 | 2008-11-20 | Watson James B | Cordless power tool system having slidably-engaging power source connection |
US7423407B2 (en) | 1998-08-13 | 2008-09-09 | Black & Decker Inc. | Cordless power tool system having slidably-engaging power source connection |
US7343683B2 (en) | 1998-08-13 | 2008-03-18 | Black & Decker Inc. | Battery powered circular saw |
US20040196002A1 (en) * | 1998-08-13 | 2004-10-07 | Watson James B. | Cordless power tool system |
US20060108981A1 (en) * | 1998-08-13 | 2006-05-25 | Watson James B | Cordless power tool system |
US20060107536A1 (en) * | 1998-08-13 | 2006-05-25 | Buck John E | Battery powered circular saw |
US6996909B1 (en) | 1998-08-13 | 2006-02-14 | Black & Decker Inc. | Battery powered circular saw |
US6161293A (en) * | 1998-08-14 | 2000-12-19 | One World Technologies, Inc. | Battery powered circular saw |
US7089671B2 (en) * | 2001-04-26 | 2006-08-15 | Makita Corporation | Circular saw with an improved lower blade guard |
US20020157265A1 (en) * | 2001-04-26 | 2002-10-31 | Makita Corporation | Circular saw with an improved lower blade guard |
US6953394B2 (en) * | 2001-06-29 | 2005-10-11 | Robert Bosch Gmbh | Protective device for a hand machine tool |
US20040157541A1 (en) * | 2001-06-29 | 2004-08-12 | Dieter Wendt | Protective device for a hand machine tool |
US7020970B1 (en) * | 2001-10-23 | 2006-04-04 | James Welch | Saw guard system |
US6735875B1 (en) * | 2002-05-22 | 2004-05-18 | At&T Corp. | Tool for removing duct surrounding a fiber optic cable |
US20050198831A1 (en) * | 2002-06-07 | 2005-09-15 | Black & Decker Inc. | Modular power tool |
US6898854B2 (en) | 2002-06-07 | 2005-05-31 | Black & Decker Inc. | Modular power tool |
US7814663B2 (en) | 2002-06-07 | 2010-10-19 | Black & Decker Inc. | Modular power tool |
US7805841B2 (en) | 2002-06-07 | 2010-10-05 | Black & Decker Inc. | Modular power tool |
USD487385S1 (en) | 2002-06-07 | 2004-03-09 | Black & Decker Inc. | Circular saw handle |
US20080189955A1 (en) * | 2002-06-07 | 2008-08-14 | Black & Decker Inc. | Modular power tool |
EP1928636A4 (de) * | 2005-09-09 | 2008-12-03 | Sj2 Ind Llc | Rückziehvorrichtung für den unteren sicherheitsschutz bei kreissägen |
US7426787B2 (en) | 2005-09-09 | 2008-09-23 | Sj2 Industries, Llc | Retractor for circular saw lower safety-guard |
US20080271310A1 (en) * | 2005-09-09 | 2008-11-06 | Tracy Jack R | Method of retrofitting a circular saw |
EP1928636A2 (de) * | 2005-09-09 | 2008-06-11 | SJ2 Industries, LLC | Rückziehvorrichtung für den unteren sicherheitsschutz bei kreissägen |
US7832072B2 (en) | 2005-09-09 | 2010-11-16 | Sj2 Industries, Llc | Method of retrofitting a circular saw |
US20070022852A1 (en) * | 2005-09-09 | 2007-02-01 | Tracy Jack R | Retractor for circular saw lower safety-guard |
US20080078090A1 (en) * | 2006-05-19 | 2008-04-03 | Johnson Charles E Iii | Manual Saw Guard Retracting Device |
US20080022537A1 (en) * | 2006-07-27 | 2008-01-31 | Credo Technology Corporation | Cutting attachment with a removable cover for rotary hand tools |
US7596872B2 (en) | 2006-07-27 | 2009-10-06 | Robert Bosch Gmbh | Cutting attachment with a removable cover for rotary hand tools |
US7310879B1 (en) | 2006-07-27 | 2007-12-25 | Robert Bosch Gmbh | Cutting attachment having an adjustable foot for rotary hand tools |
US20080305387A1 (en) * | 2007-06-11 | 2008-12-11 | Black & Decker Inc. | Cordless power tool system |
US20110099819A1 (en) * | 2009-11-04 | 2011-05-05 | John Michael Orlowski | Safety Guard for Power Saw |
US8413340B2 (en) * | 2009-11-04 | 2013-04-09 | John Michael Orlowski | Safety guard for power saw |
US20130185947A1 (en) * | 2011-09-01 | 2013-07-25 | Robert Bosch Gmbh | Brushless dc motor-driven power device |
US9009982B1 (en) * | 2012-03-29 | 2015-04-21 | Simon J. Sedgwick | Dustless drywall cutting tool |
CN104029181A (zh) * | 2013-03-04 | 2014-09-10 | 罗伯特·博世有限公司 | 手工工具机 |
CN104029181B (zh) * | 2013-03-04 | 2017-10-13 | 罗伯特·博世有限公司 | 手工工具机 |
US10875109B1 (en) | 2018-04-30 | 2020-12-29 | Kreg Enterprises, Inc. | Adaptive cutting system |
CN112368097A (zh) * | 2018-07-02 | 2021-02-12 | 胡斯华纳有限公司 | 用于动力工具的保护布置结构 |
CN112368097B (zh) * | 2018-07-02 | 2023-09-12 | 胡斯华纳有限公司 | 手持式动力切割机 |
US11364652B2 (en) * | 2019-09-03 | 2022-06-21 | Makita Corporation | Portable cutting machine |
Also Published As
Publication number | Publication date |
---|---|
JPS4866298A (de) | 1973-09-11 |
NL7213446A (de) | 1973-06-13 |
FR2164144A5 (de) | 1973-07-27 |
CH553041A (fr) | 1974-08-30 |
CA957595A (en) | 1974-11-12 |
AU460017B2 (en) | 1975-04-10 |
DE2248512A1 (de) | 1973-06-14 |
AU4569572A (en) | 1974-02-21 |
JPS5544687B2 (de) | 1980-11-13 |
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