US3787973A - Safety retracting mechanism for the lower guard of a portable saw - Google Patents
Safety retracting mechanism for the lower guard of a portable saw Download PDFInfo
- Publication number
- US3787973A US3787973A US00315307A US3787973DA US3787973A US 3787973 A US3787973 A US 3787973A US 00315307 A US00315307 A US 00315307A US 3787973D A US3787973D A US 3787973DA US 3787973 A US3787973 A US 3787973A
- Authority
- US
- United States
- Prior art keywords
- actuator
- collar
- lower guard
- movement
- guard
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P1/00—Safety devices independent of the control and operation of any machine
- F16P1/02—Fixed screens or hoods
-
- 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
- Portable saws of this type have a fixed upper blade guard, which may form part of the housing of the saw, and a lower blade guard which is mounted for swinging movement back and forth between open and closed positions, thereby to expose the blade when the saw is to be brought into engagement with the work and to enclose the blade at times when the saw is not in engagement with the work. More particularly, the present invention relates to manually operated mechanism for retracting the lower blade guard of a saw of the type under consideration.
- the usual practice is to retract the guard' with the work prior to energization of the tool motor.
- the present invention may be summarized as the provision of a new and improved retracting mechanism for a portable power saw, which mechanism permits the lower guard to be swung manually. to the open position irrespective of whether or not the work is engaged and which mechanism provides for the automatic closing of the lower blade guard upon removal of the tool from the work irrespective of the position of the actuating handle.
- a primary object of the present invention is the provision of a new and improved retracting mechanism for a portable saw, which mechanism embodies significant safety features.
- Still another object of the present invention is the provision of a lower guard retracting mechanism according to the foregoing objects, wherein the releasable means are reset to connect the lower guard linkage with the actuator in response to movement of the latter to its closed position.
- Yet another object of the present invention is the provision of a lower guard retracting mechanism according to theforegoing objects, such mechanism providing for the manual retraction of the lower guard irrespective of whether or not the saw is brought into engagement with the work.
- FIG. 1 is a perspective view of a portable power saw embodying the present invention
- FIG. 2 is an enlarged, partial side elevation and partial section of the saw of FIG. I, with only the parts constituting the present invention being illustrated;
- FIG. 3 is an enlarged section taken along the line 3-3 of FIG. 2;
- FIG. 4 is a partial elevation and section similar to FIG. 2, and showing the arrangement of the parts with the lower guard in its partially retracted position;
- FIG. 5 is an enlarged section taken along the line S--5 of FIG. 4;
- FIG. 6 is a partial elevation and section similar to FIG. 4, and showing the arrangement of the parts with the lower guard in its fully retracted position as the result of being engaged by the work;
- FIG. 7 is an enlarged section taken along the line 7-7ofFIG.6;
- FIG. 10 is an end view taken along the line ll0
- the present invention may be advantageously incorporated in a portable electric saw of the type illustrated in FIG. 1 and generally designated 10. It will be understood that the present invention has equal applicability with saws having other sources of power, such as pneumatic motors,'for example.
- Thesaw housing 11 further includes a handle 20, which handle mounts a trigger 21; depression of this trigger causes energization of the electric motor thereby to rotate the circular saw blade 18.
- the saw 10 also'inclu'des an adjustable base or platform 22; this base is preferably of the construction disclosed and claimed in the pending application of Frank A. Kaman et al., Ser. No. 206,639, filed Dec. 10, 1971, and assigned to the assignee of the present application.
- a lower blade guard, generally designated 24, is mounted for swinging movement about an annular bearing 25, which bearing is coaxial with the drive shaft 7
- a coil spring 30 has one end thereof secured to the I inner wall26 of the lower guard at a position adjacent the hub 25. The other end of this spring is suitably secured to a formation (not shown) on the inside of the upper blade guard 12. It will be understood that the spring 30 constantly urges the lower blade guard 24 in a counterclockwise direction toward its closed position.
- a first link 31 has one end thereof pivotally connected with the wall 26 of the lower blade guard, as by a pin 33. This end of the link is curved so as to clear the hub 25 and to engage the lower blade guard at a location providing a mechanical advantage for swinging the lower guard to its open position.
- the other end of the link 31 is pivotally connected to the distal end of another link 34, as by means-of a pin 35.
- the other end of the link 34 is fixed .to a shaft 37, which shaft is journaled in aligned bores 38, 39 coaxially formed in the respective walls 14 and 15 of the upper blade guard. It will be understood that the link 34 and the shaft 37 are secured together for movement. in unison.
- the shaft 37 includes anenlarged portion 40.
- a collar 42 is mounted on the shaft portion 40 both for rotation and axial movement relative thereto.
- the collar 42 is received within a recess formed by an annular wall 11a, the latter being part of the housing of the power tool.
- a manually I operable actuator 44 has a bore 45 formed in one end thereof, which bore rotatably engages the shaft portion 40.
- the shaft includes a reduced-in-diameter portion 46, which portion mounts a C-type washer 47 for retaining the actuator 44 in place.
- the actuator 44 includes an annular space 48 receiving an O-ring 49 to prevent the entry of sawdust and other foreign matter into the annular space defined by the outer surface of the housing wall 11a and an annular surface 50 of the actuator.
- the portion of the actuator forming the bore 45 includes an annular recess 52 defining a space-to receive one end of a coil spring 53.
- the other end of this spring is received within an annular recess 55 formed in the outer surface of the collar 42.
- the spring 53 acts to urge the collar 42 axially to the right as viewed in FIGS. 3, 5 and 7.
- suitable means such as a spline-type connection, are provided to permit the collar 42 to move axially of the shaft portion 40 relative .to the actuator 44 and to cause the collar 42 to rotate in response to swinging movement of the actuator.
- the shaft portion 40 includes a diametrically disposed, blind bore 57 receiving a coil spring 58 and a pin 59.
- the spring 58 acts to urge the pin 59 outwardly of the bore 57 for normally maintaining the rounded outer end of the pin 59 received within a recess 60 formed in the inner surface of the collar 42.
- This recess includes a wall surface 60a shaped such that when the same engages the pin 59 in response to counterclockwise rotation (FIG. 9) of the collar, corresponding rotation will be imparted to the shaft 37.
- This recess also includes a camming wall 60b for camming the pin 59 inwardly of the bore 57 when the shaft 37 is rotated'counterclockwise (FIG. 9) relative to the collar 42.
- the collar 42 rotates an annular surface 61 interrupted by a cam formation, the latter being defined by an included wall 62 and a wall 63.
- the wall 63 is contained in a planeperpendicular to the logitudin'al central axis of'the collar.
- this cam formation is adapted to be engaged by the outer end of a pin 64, which pin is fixedly mounted within a recess 65 formed in the saw housing adjacent the upper blade guard 12.
- the actuator 44 includes an integral abutment 67. This abutment is adapted to engage a stop formation 68 to limit swinging movement of the actuator in a countercloekwise direction.
- the stop 68 may be a formation integral with the inner wall 14 of the upper guard 12.
- FIGS. 2 and 3 illustrate the arrangement of the parts when the lower guard 24 is in its fully closed position and when the actuator 44 is in its closed position. With the parts so arranged, the pin 59 willbe received within the recess 60.
- FIGS. 4 and 5 illustrate the arrangement of parts when the actuator 44 has been moved to its fully open position. Rotation of the actuator is arrested due to engagement of the abutment 67 with the stop 68.
- spring means may be provided to return the actuator 44 to the closed position upon release of the same. This may be achieved by fashioning the spring 53 in the manner of a torsion spring and securing opposite ends thereof to the actuator 44 and upper guard 12 (or housing portion lla), respectively.
- the present invention provides a new and improved lower guard retracting mechanism having important safety features.
- the releasable mechanism between the actuator 44 and the lower blade guard 24 is actuated in response to engagement between the lower guard and the work. Should the saw be removed from the work at any time thereafter, the lower guard 24 will automatically swing to its closed position irrespective of the position of the actuator 44.
- releasable means connecting said actuator with said force transmitting assembly, which releasable means include force transmitting elements normally interengaged whereby movement of said actuator to its open position causes swinging move ment of said lower guard to its open position;
- said releasable means including a shaft and a collar mounted thereon for both rotation and axial movement relative to the shaft, which shaft has a diametrically disposed bore therein;
- said collar including a recess having a first wall and a camming wall, the latter forming part of said camming means;
- second spring means in said bore engaged with said pin normally urging the latter outwardly with one end of the pin received in said recess and engaged with said first wall, which first wall and the engaged surface of said pin constitute said force transmitting elements;
- third spring means urging said collar in one axial direction and being adapted to shift said collar in said one direction when said pin is forced from said recess by the action of said camming wall resulting from rotation of said shaft relative to said collar;
- second camming means for shifting said collar in its other direction in response to movement of said actuator toward its closed position.
- said force transmitting means including releasable means operable to disconnect said actuator from causes corresponding movement of said lower guard;
- said releasable means including first cam means for disconnecting said collar from said shaft in re- Said lower guard in response to movement of the sponse to rotation of the latter relative to the forlatter toward its open position independently of the and P Said p i means is E i g. second cam means for re-establishing the connecto Swing Sald lower gf to Closed Posltlon tion between said collar and said shaft in response Spectlve of the P of 531d actuator; and to rotation of the former relative to the latter.
- the mechanism according to claim 5 further said actuator toward its closed position for refined establishing the connection between said actuator a said releasable means being defined by a pin yield and Sald ower P ably mounted in a bore formed in said shaft and by A guard rgracmig mechanism for a portable saw a recess formed in said collar one end of the pin of the type having a circular blade, at fixed upper guard 5 being normally received in Said messy and a lower guard mounted for Swmgmg .movemem b said first cam means including a camming wall back and forth between open and closed positions, said mechanism comprising forming part of said recess, said camming wall bein ada ted to force said in out of said recess Spring means conncted with Sal(-1 -lower guard for in re: ons to movement of tl ie shaft relative to the urging the same to its closed position; n
- an actuator including a collar mounted on said and shaft for rotation and for axial movement relative thereto, which actuator is mounted for swinging movement back and forth between open and closed positions and thereby imparts correspondd.
- said second cam means including a cam and cam follower for shifting said collar axially in the other direction.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
- Knives (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US31530772A | 1972-12-15 | 1972-12-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3787973A true US3787973A (en) | 1974-01-29 |
Family
ID=23223814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00315307A Expired - Lifetime US3787973A (en) | 1972-12-15 | 1972-12-15 | Safety retracting mechanism for the lower guard of a portable saw |
Country Status (9)
Country | Link |
---|---|
US (1) | US3787973A (de) |
JP (1) | JPS5648283B2 (de) |
AU (1) | AU6262273A (de) |
CA (1) | CA1004575A (de) |
DE (1) | DE2362291C2 (de) |
FR (1) | FR2210486B1 (de) |
GB (1) | GB1444384A (de) |
IT (1) | IT1000333B (de) |
NL (1) | NL175847C (de) |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4672746A (en) * | 1986-05-08 | 1987-06-16 | Christopher Zeilenga | Protective mechanism for circular saws |
US5075976A (en) * | 1991-02-05 | 1991-12-31 | Young Peter W | Power tool guard retainer |
US5146825A (en) * | 1990-07-31 | 1992-09-15 | Ryobi Ltd. | Motor-driven chop saw having improved lower blade guard arrangement |
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 |
US6272960B1 (en) | 1998-06-03 | 2001-08-14 | Black & Decker Inc. | Chop saw |
US6389701B1 (en) * | 1999-12-17 | 2002-05-21 | Gyros Precision Tools, Inc. | Hand tool safety shroud |
US6415699B1 (en) * | 1999-02-27 | 2002-07-09 | Black & Decker Inc. | Locking arrangement for table saw guard |
US20020157265A1 (en) * | 2001-04-26 | 2002-10-31 | Makita Corporation | Circular saw with an improved lower blade guard |
US6893334B1 (en) | 2002-01-24 | 2005-05-17 | J. David Stivers | Rotating guard for angle grinder |
US20050252012A1 (en) * | 2004-05-11 | 2005-11-17 | Johnson Charles E Iii | Manual saw guard retracting apparatus |
US20060053629A1 (en) * | 2004-09-14 | 2006-03-16 | Martin Charles B | Self-contained vacuum 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 |
US20080083119A1 (en) * | 2006-10-09 | 2008-04-10 | Schmidt G Gerry | Utility Knife |
US20080114260A1 (en) * | 2004-02-05 | 2008-05-15 | Earlysense Ltd. | Techniques for prediction and monitoring of coughing-manifested clinical episodes |
US20100113545A1 (en) * | 2007-02-01 | 2010-05-06 | Steven Coulton | Glyt1 transporter inhibitors and uses thereof in treatment of neurological and neuropsychiatric disorders |
US20100311230A1 (en) * | 2008-07-31 | 2010-12-09 | Mitsubishi Electric Corporation | Semiconductor device and method of fabricating the same |
US20110099819A1 (en) * | 2009-11-04 | 2011-05-05 | John Michael Orlowski | Safety Guard for Power Saw |
CN104260128A (zh) * | 2014-09-15 | 2015-01-07 | 苏州市汇峰机械设备有限公司 | 一种便携式自动切割机 |
US9242304B2 (en) | 2004-09-14 | 2016-01-26 | Charles B. Martin | Cutting device with on-board debris collection operable in a plurality of cut angle positions |
US9840013B2 (en) | 2008-04-29 | 2017-12-12 | Pacific Handy Cutter, Inc. | Safety cutter with blade change/storage mechanism |
US20190381688A1 (en) * | 2017-01-31 | 2019-12-19 | Robert Bosch Gmbh | Circular Saw, in particular Hand-Held Circular Saw |
US11014214B2 (en) | 2016-09-02 | 2021-05-25 | Makita Corporation | Working machine |
US11364652B2 (en) * | 2019-09-03 | 2022-06-21 | Makita Corporation | Portable cutting machine |
US20230191648A1 (en) * | 2021-12-16 | 2023-06-22 | Evolution Power Tools Limited | Handheld circular saw |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3317904A1 (de) * | 1983-05-17 | 1984-11-22 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Handkreissaege mit pendelschutzhaube |
DE3421003C2 (de) * | 1984-06-06 | 1990-04-19 | Festo KG, 7300 Esslingen | Bearbeitungsmaschine mit Pendelschutzhaube |
DE3912307A1 (de) * | 1989-04-14 | 1990-10-25 | Metabowerke Kg | Kreissaege mit spaltkeil |
US5957021A (en) * | 1995-10-10 | 1999-09-28 | Black & Decker, Inc. | Guard and control apparatuses for sliding compound miter saw |
US5724875A (en) * | 1995-10-10 | 1998-03-10 | Black & Decker Inc. | Guard and control apparatuses for sliding compound miter saw |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1900553A (en) * | 1931-02-04 | 1933-03-07 | Syntron Co | Portable motor driven saw |
US3441067A (en) * | 1965-10-22 | 1969-04-29 | Fred A Forcier | Mechanical guard lifter |
US3730239A (en) * | 1971-12-10 | 1973-05-01 | Skil Corp | Circular saw with improved movable guard construction |
Family Cites Families (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 |
AT226429B (de) * | 1960-11-10 | 1963-03-25 | Mey Kg Maschf Mafell | Einhand-Motorkreissäge mit einem dem Führungshandgriff schwenkbar zugeordneten Hebel zur Bewegung des drehbaren Schutzhaubenteiles |
-
1972
- 1972-12-15 US US00315307A patent/US3787973A/en not_active Expired - Lifetime
-
1973
- 1973-11-14 NL NLAANVRAGE7315585,A patent/NL175847C/xx not_active IP Right Cessation
- 1973-11-15 CA CA185,882A patent/CA1004575A/en not_active Expired
- 1973-11-16 AU AU62622/73A patent/AU6262273A/en not_active Expired
- 1973-11-27 GB GB5498473A patent/GB1444384A/en not_active Expired
- 1973-12-14 JP JP13888173A patent/JPS5648283B2/ja not_active Expired
- 1973-12-14 FR FR7344876A patent/FR2210486B1/fr not_active Expired
- 1973-12-14 DE DE2362291A patent/DE2362291C2/de not_active Expired
- 1973-12-14 IT IT54320/73A patent/IT1000333B/it active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1900553A (en) * | 1931-02-04 | 1933-03-07 | Syntron Co | Portable motor driven saw |
US3441067A (en) * | 1965-10-22 | 1969-04-29 | Fred A Forcier | Mechanical guard lifter |
US3730239A (en) * | 1971-12-10 | 1973-05-01 | Skil Corp | Circular saw with improved movable guard construction |
Cited By (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4672746A (en) * | 1986-05-08 | 1987-06-16 | Christopher Zeilenga | Protective mechanism for circular saws |
US5146825A (en) * | 1990-07-31 | 1992-09-15 | Ryobi Ltd. | Motor-driven chop saw having improved lower blade guard arrangement |
US5075976A (en) * | 1991-02-05 | 1991-12-31 | Young Peter W | Power tool guard retainer |
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 |
US6272960B1 (en) | 1998-06-03 | 2001-08-14 | Black & Decker Inc. | Chop saw |
US6662695B2 (en) * | 1999-02-27 | 2003-12-16 | Blacker & Decker Inc. | Locking arrangement for table saw guard |
US6415699B1 (en) * | 1999-02-27 | 2002-07-09 | Black & Decker Inc. | Locking arrangement for table saw guard |
US20020134211A1 (en) * | 1999-02-27 | 2002-09-26 | Marcello Bettacchini | Locking arrangement for table saw guard |
US6389701B1 (en) * | 1999-12-17 | 2002-05-21 | Gyros Precision Tools, Inc. | Hand tool safety shroud |
US20020157265A1 (en) * | 2001-04-26 | 2002-10-31 | Makita Corporation | Circular saw with an improved lower blade guard |
US7089671B2 (en) * | 2001-04-26 | 2006-08-15 | Makita Corporation | Circular saw with an improved lower blade guard |
US6893334B1 (en) | 2002-01-24 | 2005-05-17 | J. David Stivers | Rotating guard for angle grinder |
US20080114260A1 (en) * | 2004-02-05 | 2008-05-15 | Earlysense Ltd. | Techniques for prediction and monitoring of coughing-manifested clinical episodes |
US20050252012A1 (en) * | 2004-05-11 | 2005-11-17 | Johnson Charles E Iii | Manual saw guard retracting apparatus |
US7578063B2 (en) * | 2004-09-14 | 2009-08-25 | Martin Charles B | Self-contained vacuum saw |
US8201335B2 (en) | 2004-09-14 | 2012-06-19 | Martin Charles B | Self-contained vacuum saw |
US9975268B2 (en) | 2004-09-14 | 2018-05-22 | Charles B. Martin | Portable cutting device with blade guard |
US9242304B2 (en) | 2004-09-14 | 2016-01-26 | Charles B. Martin | Cutting device with on-board debris collection operable in a plurality of cut angle positions |
US20080134518A1 (en) * | 2004-09-14 | 2008-06-12 | Martin Charles B | Self-contained vacuum saw |
US20090313834A1 (en) * | 2004-09-14 | 2009-12-24 | Martin Charles B | Self-contained vacuum saw |
US20060053629A1 (en) * | 2004-09-14 | 2006-03-16 | Martin Charles B | Self-contained vacuum saw |
US7426787B2 (en) * | 2005-09-09 | 2008-09-23 | Sj2 Industries, Llc | Retractor for circular saw lower safety-guard |
US20070022852A1 (en) * | 2005-09-09 | 2007-02-01 | Tracy Jack R | Retractor for circular saw lower safety-guard |
US20080271310A1 (en) * | 2005-09-09 | 2008-11-06 | Tracy Jack R | Method of retrofitting a circular saw |
US7832072B2 (en) | 2005-09-09 | 2010-11-16 | Sj2 Industries, Llc | Method of retrofitting a circular saw |
US20080078090A1 (en) * | 2006-05-19 | 2008-04-03 | Johnson Charles E Iii | Manual Saw Guard Retracting Device |
US8234790B2 (en) | 2006-10-09 | 2012-08-07 | Pacific Handy Cutter, Inc. | Utility knife |
US20110167646A1 (en) * | 2006-10-09 | 2011-07-14 | Schmidt G Gerry | Utility Knife |
US20080083119A1 (en) * | 2006-10-09 | 2008-04-10 | Schmidt G Gerry | Utility Knife |
US7774942B2 (en) | 2006-10-09 | 2010-08-17 | Pacific Handy Cutter, Inc. | Utility knife |
US20100113545A1 (en) * | 2007-02-01 | 2010-05-06 | Steven Coulton | Glyt1 transporter inhibitors and uses thereof in treatment of neurological and neuropsychiatric disorders |
US9840013B2 (en) | 2008-04-29 | 2017-12-12 | Pacific Handy Cutter, Inc. | Safety cutter with blade change/storage mechanism |
US20100311230A1 (en) * | 2008-07-31 | 2010-12-09 | Mitsubishi Electric Corporation | Semiconductor device and method of fabricating the same |
US11331825B2 (en) | 2009-04-24 | 2022-05-17 | Charles B. Martin | Portable cutting device with vacuum and laser guide |
US10703008B2 (en) | 2009-04-24 | 2020-07-07 | Charles B. Martin | Portable cutting device with sealing arrangement for vacuum |
US8413340B2 (en) * | 2009-11-04 | 2013-04-09 | John Michael Orlowski | Safety guard for power saw |
US20110099819A1 (en) * | 2009-11-04 | 2011-05-05 | John Michael Orlowski | Safety Guard for Power Saw |
CN104260128A (zh) * | 2014-09-15 | 2015-01-07 | 苏州市汇峰机械设备有限公司 | 一种便携式自动切割机 |
US11014214B2 (en) | 2016-09-02 | 2021-05-25 | Makita Corporation | Working machine |
US20190381688A1 (en) * | 2017-01-31 | 2019-12-19 | Robert Bosch Gmbh | Circular Saw, in particular Hand-Held Circular Saw |
US10967537B2 (en) * | 2017-01-31 | 2021-04-06 | Robert Bosch Gmbh | Circular saw, in particular hand-held circular saw |
US11364652B2 (en) * | 2019-09-03 | 2022-06-21 | Makita Corporation | Portable cutting machine |
US20230191648A1 (en) * | 2021-12-16 | 2023-06-22 | Evolution Power Tools Limited | Handheld circular saw |
Also Published As
Publication number | Publication date |
---|---|
NL7315585A (de) | 1974-06-18 |
FR2210486B1 (de) | 1977-09-30 |
JPS4989299A (de) | 1974-08-26 |
GB1444384A (en) | 1976-07-28 |
AU6262273A (en) | 1975-05-22 |
JPS5648283B2 (de) | 1981-11-14 |
IT1000333B (it) | 1976-03-30 |
NL175847C (nl) | 1985-01-02 |
FR2210486A1 (de) | 1974-07-12 |
CA1004575A (en) | 1977-02-01 |
NL175847B (nl) | 1984-08-01 |
DE2362291C2 (de) | 1985-03-28 |
DE2362291A1 (de) | 1974-06-20 |
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