Bevel Or Miter Cut Patents (Class 83/581)
  • Patent number: 9032852
    Abstract: In some examples, an apparatus includes a base including an arm selectively movable with respect to the base. The arm is selectively rotatable about a first arm axis. A base plate is engaged with the arm. A tool is configured to be detachably coupled to the base plate. The tool is movable with the base plate when coupled to the base plate. The apparatus includes a first mode with the tool coupled to the base plate and the arm being selectively rotatable about the first arm axis, a second mode with the tool coupled to the base plate and the arm being constrained from rotating about the first arm axis, the arm being substantially stationary with respect to the base; and a third mode with the tool detached from the base plate.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: May 19, 2015
    Assignee: RBWL Licensing Holdings, LLC
    Inventor: Robert Burton Behr
  • Patent number: 9027450
    Abstract: A work piece cutting apparatus including a base, a work table, a support post defining a void for a work piece being worked on to pass at least partially through the void, a cutting device, and attachment assembly for securing the cutting device to the support post. Another embodiment of the above apparatus includes a work table being movable to angle orientations relative to the base, and a locking mechanism for locking the work table into angle orientations. A further embodiment is an apparatus adapted for receiving a cutting device. The apparatus includes a base, a work table, and a tool dock base located about the work table. The tool dock base is adapted for receiving a cutting device. Another embodiment of the above apparatus includes a work table being movable to angle orientations relative to the base, and a locking mechanism for locking the work table into angle orientations.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: May 12, 2015
    Inventor: Roland Santa Ana
  • Patent number: 8960063
    Abstract: The miter saw has a base assembly, a rotatable table rotatably disposed on the base assembly, a saw assembly rotatably supported by the table, and a bevel lock assembly for locking the rotational position of the saw assembly relative to the table.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: February 24, 2015
    Assignee: Black & Decker Inc.
    Inventors: Thomas R. Kaye, Jr., Craig A. Oktavec, Daryl S. Meredith, Stephanie L. Vogel, Lee M. Brendel, Brian P. Wattenbach
  • Patent number: 8931386
    Abstract: The miter saw includes a base and a turntable. The turntable is rotatable in relation to the base. The turntable has a work piece support surface. The miter saw further includes a clamp structure secured in fixed relation to the turntable. The miter saw further includes a bevel arm pivotably connected to the turntable and a cutting arm pivotably connected to the bevel arm. The miter saw also includes a cutting assembly supported by the cutting arm. Further still the miter saw includes a clamp member movable in relation to the bevel arm between a first clamp member position and a second clamp member position. The clamp member includes a follower surface and a brake surface. The miter saw also includes an actuator including a cam surface. The actuator is (i) supported by the bevel arm, and (ii) movable in relation to the bevel arm in a linear path of movement between a first actuator position and a second actuator position.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: January 13, 2015
    Assignee: Robert Bosch GmbH
    Inventor: Michael J. Lawlor
  • Patent number: 8931385
    Abstract: The present invention is directed to a portable hose cutoff saw having an improved stable base structure comprising a front plate and a back plate, a top plate extending transversely between the front and back plates interconnecting said front and back plates, and at least one connecting member extending transversely between a bottom portion of the front and back plates. The present invention also provides for a portable hose cutoff saw having a plurality of slideably adjustable hose biasing pins that may be adjusted to optimally bias the hose at or about a portion of a hose to be cut by the saw, thereby resulting in a consistent and straight cut of the hose.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: January 13, 2015
    Assignee: The Gates Corporation
    Inventors: Martin K. Bauer, Steven G. Austin
  • Patent number: 8919231
    Abstract: Various safety systems for power tools, and in particular table saws, include detection systems for detecting a dangerous condition relative to a blade of the power tool, and reaction systems for taking mitigation action in response to detection of a dangerous condition. The safety system may detect, prevent, and/or mitigate a dangerous condition associated with the power tool.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: December 30, 2014
    Assignee: Power Tool Institute
    Inventors: Andy Butler, Brian Lamb, Chris Tacklind, Clinton Lazzari, Edward Cooper, Eric Edward Schultz, Frank Buhrmann, John Gilbert, David Titzler, William Scott, Peter L. Domeny
  • Patent number: 8910552
    Abstract: Disclosed is a movable cutting tool apparatus and/or methods for cutting workpieces; either generally including a cutting tool apparatus having a cutting tool unit support apparatus including at least a substantially stationary support structure and one or more rear-mount glide rails; a cutting tool unit which is supported by the support apparatus; a cutting implement held by the cutting tool unit, whereby the cutting tool unit operates and controls the cutting implement; and, at least one fluid coolant and/or lubricant tube connected to the cutting tool unit and adapted to flow a fluid to the cutting implement in operation; wherein the cutting tool unit and the cutting implement are directly movable with the glide rails to provide reciprocal and translational movability for the cutting tool unit and the cutting implement.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: December 16, 2014
    Assignee: Blue Collar Ventures, L.L.C.
    Inventor: Michael E. Hogan
  • Patent number: 8850941
    Abstract: The present invention includes a cutting device including a table configured to accommodate a workpiece, and a cutting unit positioned on an upper side of the table and being operable to vertically move relative to the table. The cutting unit includes a cutting blade, and a grip portion disposed on a lateral side of the cutting blade and capable of being grasped by an operator in order to vertically move the cutting unit. The grip portion has a palm contact part that can be touched by a palm of the operator when the operator grasps the grip portion. The palm contact part is inclined relative to a reference line that may be perpendicular to a surface of the cutting blade.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: October 7, 2014
    Assignee: Makita Corporation
    Inventors: Goh Yamamura, Tomohiro Hachisuka
  • Patent number: 8850940
    Abstract: A miter saw for use with a miter saw stand includes a base having a first clamping surface, a second clamping surface, and a first actuator. The miter saw further includes a turntable rotatable in relation to the base and having a work piece support surface. The miter saw also includes a support assembly attached to the turntable, and a cutting assembly attached to the support assembly and positioned over the turntable. The first actuator is movable between a first position and a second position. Movement of the first actuator from the first position towards the second position causes the first clamping surface to move toward the second clamping surface.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: October 7, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Matthew Michael Rybka, Garth William Prince
  • Patent number: 8813623
    Abstract: An assembly for coping and mounting trim molding is provided. A trim holding device for mounting a finish trim molding and a coping device are provided. The coping device includes a platform, having a back, into which to place a finish trim molding for coping and cutting, and a blade assembly having a cutter blade and configured to be manually actuated by a lever. The blade assembly is adjustable and is configured to rotate. The cutter blade is configured specifically to a size and a shape of the finish trim molding to be cut and coped. The mounting device includes a bracket, having a pair of mounting flanges, configured for placement along a wall. The bracket and flanges form generally an “F” shape trim holding device. The flanges are configured to securely hold a finish trim molding without the use of nails, glues, and adhesives.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: August 26, 2014
    Inventor: Gregory Scott Armacost
  • Patent number: 8770076
    Abstract: A cutter including a base, a holder, a cutter blade portion, and a laser generator. The holder is supported on the base portion in an upright posture. The cutter blade portion supports a moving blade. The cutter blade portion is supported on the holder movable between an upper position and a lower position. The cutter blade portion is moved into the lower position to cut a workpiece supported on the base using the moving blade. The laser generator is attached to the holder or the cutter blade portion in an orientation to direct at least a portion of the laser light onto a position on the workpiece that is directly beneath the cutter blade portion when the cutter blade portion is in the upper position.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: July 8, 2014
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Shigeharu Ushiwata, Shinji Takano, Hideaki Terashima, Kenichi Matsunaga, Ryuichi Imamura
  • Patent number: 8733220
    Abstract: The present invention provides a miter saw having a rotary-disc assembly, a swing arm assembly rotatably connected with the rotary-disc assembly, a sliding rod assembly slidably connected with the swing arm assembly, and a cutting head rotatably connected with the sliding rod assembly around a turning shaft of a head section. The miter saw may also have a sliding fixed-length mechanism for the cutting head which is used to fix the cutting head to a specific position relative to the swing arm assembly. When the cutting head is fixed at the specific position, and pivoted around the turning shaft to a lowermost position, an intersecting point between a plane of a supporting surface of a fence and a cutting edge of a saw-blade is located above an intersecting line between the supporting surface of the fence and a supporting surface of a base plate.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: May 27, 2014
    Assignee: Chervon (HK) Limited
    Inventor: Kesong Xu
  • Patent number: 8726774
    Abstract: A downdraft enclosure and curved shroud forming a 180 degree catch area for dust and debris created by miter saw operation in at any angle or position. The enclosure defines a downdraft space. Exhaust opening perforations are formed on the top of the enclosure, with a dust outlet opening formed in the base of the enclosure. A flexible hose from the saw housing to the downdraft space captures debris ejected in an upward direction; the shroud, top of the enclosure, and miter saw fence capture dust ejected in outward, side and downward directions. A hose may be installed on the dust outlet to continuously carry the debris directly to a vacuum, thereby continuously keeping a workspace clear of debris ejected in all directions regardless of the saw's cut angle or position.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: May 20, 2014
    Inventor: David Kellum
  • Patent number: 8707837
    Abstract: The objective is to improve durability while making it possible to maintain an excellent cutting plane and feeling of use with a simpler configuration. Disclosed is a tabletop circular saw for which a main body equipped with a saw blade that is rotated by the driving of a motor is provided to be capable of vertical movement on a base on which a material to be cut is placed; the output shaft of the motor is provided parallel to a spindle of the saw blade; and an automatic torque adjustment mechanism, which is equipped with a drive pulley, a follower pulley, and a belt, and which automatically adjusts the torque transmitted from the output shaft to the spindle according to the load when the saw blade rotates, is provided between the output shaft and the spindle.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: April 29, 2014
    Assignee: Makita Corporation
    Inventors: Shinya Kojima, Masahiko Miura, Toshiyuki Kani
  • Patent number: 8695468
    Abstract: Embodiments of the present invention include a locking assembly for a power miter saw of the type which has a base and a table that is rotatably mounted on the base about a center pivot axis, comprising a pair of oppositely facing arcuate surfaces on the base spaced from and being concentric with the center pivot axis, a clamp attached to the table for engaging the arcuate surfaces to lock the table from rotating relative to the base by applying a clamping force to the arcuate surfaces and not to the center pivot axis, and an actuating mechanism for operating the clamp.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: April 15, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Adam S. Thomas
  • Patent number: 8671811
    Abstract: A portable table saw in one embodiment includes a base, a first support post and a second support post, each of the first and second support post extending upwardly to a location higher than the base, at least one support rail having a first end portion supported by the first support post and a second end portion supported by the second support post, a saw movably mounted to the at least one support rail at a location between the first end portion and the second end portion, the saw positioned above the base and movable along the at least one support rail, and a first pivot mechanism configured to pivot the saw with respect to the base.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: March 18, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Matthew Michael Rybka
  • Patent number: 8661957
    Abstract: A cutting device includes a table for placing thereon a workpiece. A tool unit supports a cutting tool and is laterally tiltably supported on the table, so that the rotational axis of the cutting tool can be inclined relative to a horizontal direction. A positioning device includes a first positioning member and a second positioning member that can interact with each other to position the tool unit at a plurality of laterally tilted positions. At least one of the first and second positioning members can be moved to change the laterally tilted position positionable by the positioning device.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: March 4, 2014
    Assignee: Makita Corporation
    Inventors: Syuji Aoyama, Toshiyuki Kani, Shinya Kojima, Goh Yamamura, Katsuhiko Sasaki
  • Patent number: 8640581
    Abstract: The invention relates to a cutting machine, in particular for cutting mats to size by means of a blade (21) arranged on a cutting head (8). The cutting head (8) can be displaced by means of a drive in at least two axes. The cutting-to-size of mats requires a vertical cutting angle (B-B) and an inclined cutting angle (C-C) in order to provide the mat cutout with the, in the main, usual bevel cut. In order to adjust the blade (21) from the first cutting angle (B-B) into the second cutting angle (C-C) or vice versa, the cutting head (8) is run up against a stop (17) arranged on the cutting machine and is brought into contact in such a way that a swivellable element (20) carrying the blade (21) is swivelled from one into the other cutting angle (B-B, C-C). This adjustment can thus take place in an automatically controlled manner, without an additional drive being required for this.
    Type: Grant
    Filed: September 7, 2009
    Date of Patent: February 4, 2014
    Assignee: Weissenberger AG
    Inventor: Andreas Weissenberger
  • Patent number: 8640583
    Abstract: A detection system for detecting a dangerous condition for an operator using a power tool of the type which has an exposed blade relative to a work surface and a protection system for minimizing, if not eliminating the possibility of a user being injured by contacting the blade. In one preferred embodiment of the present invention, a proximity detection system is capable of detecting the presence of a user near the blade of a table saw and a protection system that can either retract the blade below the work surface of the table saw or terminate the drive torque to the blade which can result in rapid stopping of the saw blade by a work piece that is being cut.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: February 4, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Wojciech T. Pierga, Thomas R. Siwek, Ahmad R. Shishegar
  • Patent number: 8631733
    Abstract: A miter saw is provided with a base unit on which target material is placed, a table unit rotatably provided on the base unit, a swing unit for swinging up and down above the table unit, and a cutting unit provided on the swing unit and having a flat motor provided with a rotor having an output shaft and a coil disc provided with a plurality of coil pieces arranged in the circumferential direction about the output shaft when seen in the direction of the axis of the output shaft and a stator having a magnet arranged such that magnetic flux passes through the coil disc in the direction of the axis of the output shaft, and a rotating blade rotation shaft on which a rotating blade can be mounted and positioned substantially parallel to the direction of the axis of the output shaft of the flat motor, and a power transfer unit that transfers the power of the flat motor to the rotating blade.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: January 21, 2014
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Ryuichi Imamura, Masayuki Tajima
  • Patent number: 8621970
    Abstract: A miter saw includes a base, a turntable rotatable in relation to the base and including a work piece support surface, a support assembly attached to the turntable, and a saw assembly attached to the support assembly and configured to cut a work piece supported on the turntable. A fence assembly includes an elongate fence body that extends along a first axis. The elongate fence body is supported by the base and positioned over the turntable. The fence body has a first connecting structure, and a fence insert defining an elongate work piece abutment surface and having a second connecting structure. The fence assembly is positionable in a first configuration and a second configuration. In the first configuration, the second connecting structure cooperates with the first connecting structure to secure the fence insert at a first position in relation to the fence body.
    Type: Grant
    Filed: January 3, 2011
    Date of Patent: January 7, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Michael J. Lawlor, Juergen Wiker
  • Patent number: 8616104
    Abstract: A table saw includes a support arrangement, a table top assembly connected to the support arrangement, the table top assembly having (i) a work piece support surface, and (ii) a saw blade opening defined in the work piece support surface, a saw assembly supported under the table top assembly including a saw blade, and a saw assembly adjustment mechanism having a user actuator. The user actuator causes movement of the saw blade in relation to the work piece support surface. A first extension element extends from the support arrangement and defines a first extension space, and a second extension element extends from the support arrangement and defines a second extension space, wherein a first protection zone is defined between the first extension space and the second extension space, and wherein the actuator is completely contained within the first protection zone.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: December 31, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Andrew Frolov, Jason Feldner, Carl Cepress
  • Patent number: 8607678
    Abstract: A miter saw has a base assembly, a table assembly rotatably disposed on the base assembly, a support housing connected to the table assembly, and a saw assembly pivotably attached to the support housing. The saw assembly is pivotable downwardly for cutting a workpiece disposed on the table assembly. The saw has a miter lock assembly including a shoe assembly connected to the table housing and movable between a first position not contacting the base assembly and a second position contacting the base assembly. The shoe assembly has a movable shoe for adjusting the angular position of the table assembly relative to the base assembly.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: December 17, 2013
    Assignee: Black & Decker Inc.
    Inventor: Robert S. Gehret
  • Patent number: 8607679
    Abstract: A laminate flooring saw system which can be used for both rip cuts and miter cuts in one embodiment includes a first power switch proximate the saw and movable with the saw along a support arm; a second power switch that is not movable with the saw along the support arm; and a third switch movable between a first position wherein application of energy to the saw is dependent upon the position of the second power switch and independent of the position of the first power switch and a second position wherein application of energy to the saw is dependent upon the position of both the first power switch and the second power switch.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: December 17, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Christopher Heflin, Gregg M. Mangialardi, Cui Ke, Matthew M. Rybka, P. Sean Gallagher, Bryan M. Shova, Donald J. Staufenberg
  • Patent number: 8561513
    Abstract: A miter saw for cutting a workpiece is disclosed. The miter saw has a base section, a holder section, a saw blade section, a saw blade support section, and a guide bar. The base section has an upper surface for supporting a workpiece to be cut. The holder section stands from the base portion. The saw blade section has a circular saw blade for cutting the workpiece. The saw blade support section pivotably supports the saw blade section. The guide bar slidably supports the saw blade support section. The guide bar is slidably supported by the holder section. The guide bar extends substantially parallel to the upper surface of the base section. The saw blade support portion is slidable along the guide bar.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: October 22, 2013
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Shigeharu Ushiwata, Ryuichi Imamura, Hideaki Terashima
  • Patent number: 8539870
    Abstract: In some examples, an apparatus includes a base including an arm selectively movable with respect to the base. The arm is selectively rotatable about a first arm axis. A base plate is engaged with the arm. A tool is configured to be detachably coupled to the base plate. The tool is movable with the base plate when coupled to the base plate. The apparatus includes a first mode with the tool coupled to the base plate and the arm being selectively rotatable about the first arm axis, a second mode with the tool coupled to the base plate and the arm being constrained from rotating about the first arm axis, the arm being substantially stationary with respect to the base; and a third mode with the tool detached from the base plate.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: September 24, 2013
    Assignee: RBWL Licensing Holdings, LLC
    Inventor: Robert Burton Behr
  • Patent number: 8499672
    Abstract: A power miter saw comprises a saw base having a fence for positioning a work piece, a table rotatably connected to the saw base; a miter arm assembly for angularly positioning the table relative to the saw base, a saw blade and motor assembly operatively connected to the table, a linear guide mechanism attached to the table and being configured to support the saw blade and motor assembly and enable movement of the assembly along a predetermined linear path in either forward or rearward directions, the mechanism having a horizontal shaft about which the assembly is pivotable to move a saw blade vertically into and out of cutting position, the mechanism also having a multiple link hinge pivotally interconnecting the motor assembly and the table with horizontal shafts that are parallel to one another.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: August 6, 2013
    Assignee: Robert Bosch GmbH
    Inventor: Stephen C. Oberheim
  • Patent number: 8490527
    Abstract: Woodworking machines are disclosed having cutting tools for cutting workpieces. The machines include a detection system adapted to detect one or more dangerous conditions between a person and the cutting tool. The machines also include a mechanism having a moveable component adapted to move upon detection of the dangerous condition by the detection system. Movement of the moveable component contributes to one or more of the following actions to mitigate or prevent injury to the person: deceleration of the cutting tool, retraction of the cutting tool, and placement of a barrier over at least a part of the cutting tool. An actuator is adapted to move the moveable component at a high acceleration when the dangerous condition is detected.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: July 23, 2013
    Assignee: SD3, LLC
    Inventors: Stephen F. Gass, David S. D'Ascenzo
  • Patent number: 8459157
    Abstract: Safety systems for power equipment, components, brake cartridges and mounting systems for brake cartridges are disclosed. The safety systems, components, brake cartridges and mounting systems are specifically applicable for woodworking equipment such as saws. A brake cartridge system may include a key adapted to secure the brake cartridge in a power tool, and a bracket configured to receive at least part of the key.
    Type: Grant
    Filed: December 31, 2004
    Date of Patent: June 11, 2013
    Assignee: SD3, LLC
    Inventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
  • Patent number: 8430005
    Abstract: Miter saws are disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to stop the blade from rotating, to create an impulse against movement of the blade into the cutting zone, or to cause the blade to move away from the cutting zone. The reaction system may include a brake member coupled to a housing.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: April 30, 2013
    Assignee: SD3, LLC
    Inventors: Stephen F. Gass, J. David Fulmer
  • Patent number: 8424434
    Abstract: Embodiments of the present invention comprise a fence for a power saw having a table top with generally vertical front, rear and opposite side surfaces, at least one side surface having an elongated side element extending from a front portion toward said rear surface, said side element having a cross section defining a vertical groove with an inner vertical surface that merge into upper and lower opposed extensions that define upper and lower undercuts, said fence comprising an elongated fence member having a generally vertical front planar surface for engaging a work piece, a table extension having a top surface area coextensive with said saw table top and operatively connected to said fence member, said extension providing support for a work piece that extends beyond a side of the table top surface, said fence being configured so that the front planar surface can be positioned in front of the vertical front surface of the saw, i.e., off of the top surface.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: April 23, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Jan Koegel, Uwe Striggow
  • Patent number: 8418590
    Abstract: A miter saw includes a base, and a table disposed on the base, the table having a top surface extending between a front end and a rear end of the table. The miter saw also includes a cutting assembly overlying the table, the cutting assembly including a rotatable cutting blade having a peripheral cutting edge, and a motor for driving said cutting blade. At least one guide rail is connected with the table and coupled with the cutting assembly for guiding sliding movement of the cutting assembly over the table between a rear-most position and a forward-most position. The miter saw includes a locking assembly coupled with at least one of the cutting assembly and the at least one guide rail for locking the cutting assembly in an intermediate position located between the rear-most position and the forward-most position.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: April 16, 2013
    Assignee: Black & Decker Inc.
    Inventors: Kevin S. Agan, Daryl S. Meredith
  • Patent number: 8371200
    Abstract: The present invention relates to a miter box. Miter boxes have a base, a pair of opposed side walls, and at least one aligned slot in the side walls. An embodiment of the present invention includes at least one guide rail mounted on the base perpendicular to the side wall. Further, a clamping assembly is positioned on the guide rail. The clamping assembly is selectively moveable along said guide rail. In this manner, a work piece can be secured to the miter box to hold the piece in position while it is being cut.
    Type: Grant
    Filed: February 3, 2009
    Date of Patent: February 12, 2013
    Assignee: Meridian International Co., Ltd.
    Inventor: Yu Jun Zhang
  • Patent number: 8359959
    Abstract: A cutting device includes a table for placing thereon a workpiece. A tool unit supports a cutting tool and is laterally tiltably supported on the table, so that the rotational axis of the cutting tool can be inclined relative to a horizontal direction. A positioning device includes a first positioning member and a second positioning member that can interact with each other to position the tool unit at a plurality of laterally tilted positions. At least one of the first and second positioning members can be moved to change the laterally tilted position positionable by the positioning device.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: January 29, 2013
    Assignee: Makita Corporation
    Inventors: Syuji Aoyama, Toshiyuki Kani, Shinya Kojima, Goh Yamamura, Katsuhiko Sasaki
  • Patent number: 8359960
    Abstract: A cutter including a base, a holder, a cutter blade portion, and a laser generator. The holder is supported on the base portion in an upright posture. The cutter blade portion supports a moving blade. The cutter blade portion is supported on the holder movable between an upper position and a lower position. The cutter blade portion is moved into the lower position to cut a workpiece supported on the base using the moving blade. The laser generator is attached to the holder or the cutter blade portion in an orientation to direct at least a portion of the laser light onto a position on the workpiece that is directly beneath the cutter blade portion when the cutter blade portion is in the upper position. Alternatively, a holder has a shaft support portion, and a slide shaft is axially slidably supported by the shaft support portion. A front end of the slide shaft has a hinge holder which pivotally supports the cutting blade portion. A laser generator is fixed to a front side of the hinge holder.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: January 29, 2013
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Shigeharu Ushiwata, Shinji Takano, Hideaki Terashima, Kenichi Matsunaga, Ryuichi Imamura
  • Patent number: 8336432
    Abstract: A safety system for a rotary saw or other dangerous machine tools features a flesh-sensing circuit (14, 19), located on a safety guard (16) surrounding a dangerous machine part, which generates an electronic signal to trigger emergency stopping of the machine before the operator can contact the dangerous machine part. The stopping means preferably employs DC injection, winding current direction reversal and/or electromagnetic motor braking, in the event of detection of operator contact with the safety guarding device. The system is adapted to be used both with newly-manufactured machine tools and by retrofitting onto previously-manufactured machine tools, by in-the-field modifications.
    Type: Grant
    Filed: September 24, 2011
    Date of Patent: December 25, 2012
    Inventor: David J Butler
  • Patent number: 8322261
    Abstract: Embodiments of a power miter saw comprise a saw base, a rotatable table, a miter arm, a saw blade and motor assembly operatively connected to the table, a hinged linear guide mechanism configured to support and move the assembly along a predetermined linear path, the mechanism comprising a first hinge having first and second links pivotably connected together by a first shaft extending through aligned openings therein, and a locking lever having a handle and a locking blade at opposite end portions and a pivot portion with a pivot connection therebetween for pivotably mounting the lever to one of the links, the blade being configured to fit within a gap between adjacent surfaces of the first and second links when the guide mechanism is in one of its extended or retracted positions and the lever is moved into a locked position.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: December 4, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Jie Liu, Al Pierga
  • Patent number: 8302519
    Abstract: A power tool includes an electric motor, a motor housing in which the electric motor is at least partially positioned, a blade drivably coupled to the motor for rotation about a first axis, and a blade housing in which the blade is at least partially positioned. The blade and the blade housing are pivotably coupled to the motor housing about a second axis substantially parallel to the first axis.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: November 6, 2012
    Assignee: Techtronic Power Tools Technology Limited
    Inventors: Robert E. McCracken, Ryan T. Harrison
  • Patent number: 8281696
    Abstract: A method for automatically cutting a workpiece by moving a workpiece along its longitudinal axis, positioning a cutting blade by rotating the blade about a vertical axis, positioning the cutting blade by rotating about a bevel axis, and moving the blade into cutting contact with the workpiece, thereby cutting the workpiece at a compound angle. The method may also include positioning the blade along a transverse axis. Further steps may include moving the cutting blade along a transverse axis simultaneous to moving the workpiece along its longitudinal axis, thereby creating a scarf cut; sorting a finished workpiece; and marking the workpiece.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: October 9, 2012
    Assignee: Illinois Tool Works, Inc.
    Inventor: David L. McAdoo
  • Patent number: 8276895
    Abstract: The present invention relates to a clamping device comprising an elongate support structure carrying a fixed jaw and a movable jaw and an advancing clamping mechanism mounted on the support structure for advancing the movable jaw toward the fixed jaw in a longitudinal direction. The clamping device further comprises a transportation mechanism for convenient transportation.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: October 2, 2012
    Assignee: Positec Power Tools (Suzhou) Co., Ltd.
    Inventors: Warren Brown, Graham Gerhardt, Harry Szommer, Guojun Chen, Quangang Liu
  • Patent number: 8276492
    Abstract: An angle adjustment structure installed in a hydraulic cut-off press between a worktable and a machine base for adjusting the angular position of the worktable relative to the machine base is disclosed to have arched rails fixedly symmetrically provided at two opposite upright peripheral walls of the worktable at the bottom side, arched sliding grooves respectively formed in two opposite upright peripheral walls of the machine base at the top side for supporting the arched rails, a worm pivotally mounted in the machine base, and an arched worm gear fixedly mounted in the worktable at the bottom side and meshed with the worm for moving the worktable relative to the machine base along the arched sliding grooves upright rotation of the worm to adjust the angular position of the worktable by an external biasing force.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: October 2, 2012
    Inventor: Sen-Jung Chuang
  • Patent number: 8230768
    Abstract: A miter saw having good workability without decrease in angle visibility is disclosed. The miter saw includes a display unit provided on a turntable. The display unit 600 is positioned between an operating handle protruding outward from the turntable and a rotation axis of the turntable. The display unit is positioned below the upper surfaces of a base and the turntable not so as to protrude above the upper surface of the turntable. The display unit displays an inclination angle of a circular saw blade with respect to the upper surface of the base and a rotation angle of the turntable with respect to the base in a line.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: July 31, 2012
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiromi Ozawa, Eisaku Oka, Nobuhiro Takano, Hideaki Terashima
  • Patent number: 8201483
    Abstract: Operating a power saw between a pair of parallel guide rails, which engage opposing sides of saw base plate to constrain the motion of the saw to a straight path, allows for precise cuts. A set of two or more fences allows for multiple cutting options. In some embodiments, non-parallel fences coupled to the guide rails allow for precise cuts at more than just a single angle. In some embodiments, two fences may engage opposing sides of the object to be cut simultaneously, holding the object more securely with respect to the guide rails than would a single fence. A possible clamping force holding the two fences against the object allows the miter guide to remain fixed relative to the object so that the user's hand may be freed for another task, such as holding the saw with both hands.
    Type: Grant
    Filed: June 19, 2010
    Date of Patent: June 19, 2012
    Inventor: Kelce Steven Wilson
  • Patent number: 8186255
    Abstract: A woodworking machine having one or more dangerous portions is disclosed. The machine also includes a safety system configured to detect accidental contact between a person and at least one of the dangerous portions by electrically coupling a signal to the person's body, and detecting if the signal becomes coupled to the dangerous portion.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: May 29, 2012
    Assignee: SD3, LLC
    Inventors: Stephen F. Gass, J. David Fulmer
  • Patent number: 8186253
    Abstract: Power tool includes a movable blade and a detection system for detecting contact between the blade and an object. Detection system includes an excitation plate capacitively coupling the drive signal to the movable blade. A circuit generates an in-phase component signal and a quadrature component signal from a blade current signal indicative of the instantaneous current drawn by the movable blade and calculates an energy of the blade current signal considering the in-phase and the quadrature components. The circuit compares the energy of the blade current signal to an adaptive trigger threshold to detect contact between the blade and the object based on whether the energy of the blade current signal is greater than the adaptive trigger threshold.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: May 29, 2012
    Assignee: Power Tool Institute
    Inventors: Vladimir Tetelbaum, Darius Mostowfi, Richard Suprenant
  • Patent number: 8176824
    Abstract: A miter saw comprises a base and a bevel support pivotable with respect to the base. A cutting blade is supported by the bevel support and moveable between a plurality of cutting positions. The miter saw further comprises a bevel stop member moveably connected to the base between a plurality of stop positions. The plurality of stop positions include a first stop position where the bevel stop member is configured to stop the bevel support at a bevel angle of less than forty-five degrees. The plurality of stop positions also include a second stop position where the bevel stop member is configured to stop the bevel support at a bevel angle of about forty-five degrees. Furthermore, the plurality of stop positions include a third stop position where the bevel stop member is configured to allow the bevel support to pivot to a bevel angle of greater than forty-five degrees.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: May 15, 2012
    Assignee: Robert Bosch GmbH
    Inventor: Michael J. Lawlor
  • Patent number: 8176823
    Abstract: A miter saw with a bevel lock arrangement comprises a base with a bevel arm configured to rotate about a first axis that is substantially parallel to a support surface provided on the base. A cutting arm is pivotably connected to the bevel arm and configured to rotate about a second axis that is substantially perpendicular to the first axis. A locking surface is connected to the base and is oriented substantially perpendicular to the support surface. A clamping surface is moveably connected to the bevel arm and configured to engage the locking surface. An actuator is configured to move between a locked position and an unlocked position. The actuator is configured to force the clamping surface against the locking surface when the actuator is in the locked position and to release the clamping surface from the locking surface when the actuator is in the unlocked position.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: May 15, 2012
    Assignee: Robert Bosch GmbH
    Inventor: Michael J. Lawlor
  • Patent number: 8171835
    Abstract: [Object] An apparatus for chamfering fold formation tape ends is provided which not only facilitates setting of a workpiece tape but also simultaneously carries out cutting of the tape so as to form acute-angled ends and chamfering of the side faces of the tape ends to perform end processing at two positions at a time.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: May 8, 2012
    Assignee: Daiso Co., Ltd.
    Inventor: Joji Otsuka
  • Patent number: 8161858
    Abstract: One aspect of the invention can include a cutting machine having a table, a cutting machine body supported by the table via a sliding mechanism to allow movement in a vertical direction and a horizontal direction, the cutting machine body including a fixed cover positioned around an upper side of a rotary blade mounted to a rotatably driven spindle, the rear edge portion of the fixed cover is recessed upward to enable a large cutting depth. The sliding mechanism includes an intermediate stopper mechanism that can be operated to switch between a state where the cutting machine body can slide within an entire slidable range and a state were the cutting machine body can slide only within a partial slidable range at a midway position.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: April 24, 2012
    Assignee: Makita Corporation
    Inventor: Syuji Aoyama
  • Patent number: RE44057
    Abstract: A cutting device includes a base, a swivel seat rotatably mounted on the base and having a first end and a second end, and a blade holder releasably engaged with the second end of the swivel seat. A blade is rotatably held by the blade holder. The blade holder is pivotable relative to the swivel seat for cutting when the blade holder is engaged with the second end of the swivel seat. An inclination of the blade relative to the swivel seat is adjustable when the blade holder is disengaged from the second end of the swivel seat. An operative rod is mounted to the first end of the swivel seat and operably connected to the blade holder for controlling releasable engagement between the blade holder and the swivel seat.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: March 12, 2013
    Assignee: Black & Decker Inc.
    Inventor: Lee-Cheng Chang