Rotary Patents (Class 30/388)
  • Patent number: 11141851
    Abstract: A cordless, hand-held power tool, such as a hammer drill/driver, a drill/driver, an impact driver, an impact wrench, etc., that includes a brushless direct current (“BLDC”) motor. Each of the hand-held power tool includes a removable and rechargeable battery pack, electronics, and a BLDC motor that have been designed and balanced to produce a high-performance-capable (e.g., high-power, high-current, high-torque) hand-held power tool. The hand-held power tool is capable of delivering high instantaneous (i.e., short duration) current to the BLDC motor for short-duration high power operation and high continuous (i.e., long duration) current to the BLDC motor for long duration high power operation. Additionally, the short and long duration power is capable of being provided in a smaller (in size) and lighter (in weight).
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: October 12, 2021
    Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
    Inventors: Brandon L. Verbrugge, Matthew J. Mergener, Matthew P. Wycklendt, Jeffrey C. Hessenberger, Dennis J. Grzybowski
  • Patent number: 11027344
    Abstract: A cutting device main body with a saw blade in a tabletop cutting device, supported so as to be swingable in an up-to-down direction with respect to a table on which material to be cut is placed, aims to improve operability for attaching and detaching the battery. A sliding direction for attaching and detaching the battery is set to be a tilting direction angled with respect to an up-to-down moving direction of the cutting device main body in a surface direction of a cutting blade. Because of this configuration, all of an operation force for attaching and detaching the battery is not applied to the up-to-down moving direction of the cutting device main body. As a result, the cutting main body is not moved in an easy manner and operability for attaching and detaching the battery is improved.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: June 8, 2021
    Assignee: MAKITA CORPORATION
    Inventors: Toshiyuki Kani, Yukinori Suzuki
  • Patent number: 10913174
    Abstract: A controller 50 is disposed to the front relative to a rotation shaft 11d of an electric motor 11 above a base 2, so as to be tilted in the up-to-down direction as it extends frontward.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: February 9, 2021
    Assignee: MAKITA CORPORATION
    Inventor: Tatsuo Nakashima
  • Patent number: 10792740
    Abstract: A tool, in particular a plunge-cut saw blade, includes a saw blade that has at least one main body and at least one working part. The working part has at least one working edge with saw teeth and is connected integrally to the main body along a straight connecting edge. The working edge includes a curved and/or polygon-like formation thereon.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: October 6, 2020
    Assignee: Robert Bosch GmbH
    Inventor: Urs Karlen
  • Patent number: 10685450
    Abstract: A controller controls operation of a forming machine capable of forming a workpiece. The controller includes: an object determination unit configured to determine an object other than the workpiece and the forming machine based on image data sensed by a sensor; a setting unit configured to set a plurality of determination areas based on a bolster shape of the forming machine included in the image data; a detection unit configured to detect entry of the object into each of the plurality of determination areas set by the setting unit; and a control unit configured to limit operation speed of the forming machine based on the determination area in which the entry of the object has been detected by the detection unit.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: June 16, 2020
    Assignee: KOMATSU INDUSTRIES CORPORATION
    Inventors: Tetsuyou Watanabe, Takeshi Kobayashi, Shuhei Yamashita
  • Patent number: 10603808
    Abstract: Machine vision apparatus tracks a distinctive object in relation to a hazardous location on a work surface of a modified band saw in two, three, or four (3-D+T) dimensions, and calculates whether to send an “immediate shut-down signal” to the band saw. Cameras and an image processor are mounted on the band saw. The signal causes an integrated blade-arresting or stopping mechanism to immediately shift the idler wheel, removing blade tension and disconnecting the blade which is then braked to a complete, safe stop before an approaching blue-gloved hand can touch the blade.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: March 31, 2020
    Assignee: KANDO INNOVATION LIMITED
    Inventors: Keith Blenkinsopp, Donald Michael Oxley, Winston Duang Wickham, Jonathan Tee Wrigley
  • Patent number: 10524483
    Abstract: A scribe saw head assembly is provided for a loin puller and has substantially reduced wear and increased life of the assembly components. A pinion assembly includes a pinion shaft and a thrust bearing. The shaft has a flange to support the thrust bearing, which is retained by a pair of retainers. The flange and thrust bearing provides constant contact between the pinion shaft and the standard of the scribe saw assembly, prevents side to side movement of the pinion shaft, and prevents longitudinal floating of the pinion shaft.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: January 7, 2020
    Assignee: Hall Fabrication, Inc.
    Inventor: Dave Chappell
  • Patent number: 10065248
    Abstract: The invention relates to a tool device which is suitable for use with a machine tool, in particular a hand guided machine tool, having a driving device moving, in particular in an oscillating manner, around a driving axis. The tool device has an attachment device which allows it to be fastened on a machine tool such that its driving axis and an axis of rotation of the tool substantially coincide. The attachment device, for absorbing the driving force, has at least two driving area regions, which are spaced apart from said tool axis of rotation and each has a plurality of surface points. The tangent planes to said surface-area points are inclined in regard to an axial plane, which encloses the tool axis of rotation. Furthermore, said tangent planes are inclined regard to a radial plane which extends perpendicularly to the tool axis of rotation. This means that the torque introduced into the tool device by the machine tool, via the driving device, is reliably absorbed.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: September 4, 2018
    Assignees: C. & E. FEIN GMBH, ROBERT BOSCH GMBH
    Inventors: Olaf Klabunde, Juergen Blickle, Walter Thomaschewski, Fabian Bek, Stefano Delfini, Willi Fellmann, Bruno Luescher, Milan Bozic, Thomas Mathys, Daniel Grolimund
  • Patent number: 9706782
    Abstract: A shoulder-blade incision-making apparatus is provided and includes: a fixing jig on which the poultry carcass which is eviscerated and which has leg parts removed is to be placed and fixed; a fixing jig conveyer forming a conveyance path of the fixing jig and convey the fixing jig along the conveyance path; a first separating member disposed above the conveyance path movably upward and downward; and a first driving device for moving the first separating member in an upward and downward direction. The first driving device is operated to move downward the first separating member and move the first separating member along a surface of the shoulder blade of the poultry carcass in accordance with a timing when the poultry carcass fixed to the fixing jig reaches a meat-separation position below the first separating member, therefore the meat portion attached to the shoulder blade is separated from the shoulder blade.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: July 18, 2017
    Assignee: MAYEKAWA MFG. CO., LTD.
    Inventors: Noriyuki Inoue, Shinji Hane, Kenichi Oka, Koji Takanashi, Naoki Toyoda, Hiroyuki Sakurayama, Noriyuki Takahashi
  • Patent number: 9587665
    Abstract: Provided is a screw fastener provided with the function of a torque limiter which allows a high limit value to be set for the fastening torque without increasing the size thereof or the spring force of the spring member, and is easy to assemble and service. A multiple plate torque limiter is formed by a plurality of drive disk members (50) and a plurality of driven disk members (52) between a first member (10) and a second member (30), and the first member (10) and the second member (30) are detachably joined to each other by a retaining screw (22).
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: March 7, 2017
    Assignee: Miki Pulley Co., Ltd.
    Inventors: Tomio Watanabe, Hideo Sato
  • Patent number: 9517555
    Abstract: A battery operated handheld power tool, comprising a working tool assembly (20), a handle assembly (10) and an elongate tubular rod (30). The working tool assembly (20) comprises a motor housing (26) having a first inner space (27), comprising an electric motor (21) with a fan (25). The first inner space (27) is connected to the exterior of the working tool assembly (20) by means of at least one air outlet (28). The handle assembly (10) comprises a second inner space (19) in which a control unit (15) is positioned, the second inner space (19) being in flow communication with the exterior of the handle assembly (10). The elongate tubular rod (30) defines an air guiding channel (33), in flow communication with the first inner space (27) and the second inner space (19).
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: December 13, 2016
    Assignee: HUSQVARNA AB
    Inventors: Mikael Racov, Henrik Hvitman, Peter Gunnarsson
  • Patent number: 9224995
    Abstract: A battery pack for powering a battery powered tool may include a housing, a plurality of cells and an electrical connection assembly. The housing may include a sidewall assembly configured to correspond to respective sidewalls of a battery compartment defined at a portion of the battery powered tool to facilitate insertion of the battery pack into the battery compartment. The sidewall assembly may form an enclosure around the plurality of cells on all sides substantially parallel to the direction of insertion. The electrical connection assembly may be disposed at a portion of the sidewall assembly to communicate the combined output to a connector disposed at a corresponding sidewall of the battery compartment. The electrical connection assembly may be arranged to engage the connector responsive to movement of the battery pack in a direction substantially parallel to the direction of insertion of the battery pack into the battery compartment.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: December 29, 2015
    Assignee: HUSQVARNA AB
    Inventors: Par Martinsson, Johan Bjornlinger, Oskar Bergquist, Mikael Racov, Johan Svennung
  • Publication number: 20150135915
    Abstract: A saw blade for a machine tool driven oscillatingly about a longitudinal axis has at least one cutting edge, on which, at least in part, abrasive particles are provided. The saw blade is suitable, in particular, for sawing fiber composites.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 21, 2015
    Inventor: Rainer Mann
  • Publication number: 20150128429
    Abstract: The disclosure relates to a transmission for a power tool, comprising an input gear driven by a driver, an intermediate shaft carrying first and second intermediate gears, the first intermediate gear being meshed with the input gear, an output shaft carrying an output gear, the output gear being meshed with the second intermediate gear for driving a tool bit, and proximal and distal bearings supporting proximal and distal ends of the intermediate shaft respectively. The first intermediate gear is formed with a receptacle portion which is recessed from a proximal end surface of the first intermediate gear in an axial direction towards a distal side, the proximal bearing being received in the receptacle portion at least in part in the axial direction. The disclosure also relates to a power tool comprising the above transmission. The disclosure provides a compact and robust structure.
    Type: Application
    Filed: February 27, 2013
    Publication date: May 14, 2015
    Inventors: Youmei Yan, Bo Zhen, Aigui Wang
  • Publication number: 20150107122
    Abstract: Snips and scissors that have traditional cutting blades in conjunction with cutter wheels attached and used for cutting sheet materials to be faster and more efficient than conventional snips and scissors, a tool with no conventional scissor blades but uses arms to attach the cutter wheels still using the scissors action to cut and also make gliding cuts in sheet materials with a safety cutter wheel assembly and embodied in children's type safety scissors, a tool that allows interchangeable wheels to be replaced for a new set or removable for sharpening of either the blade or the cutter wheels also a set of plinking
    Type: Application
    Filed: July 16, 2010
    Publication date: April 23, 2015
    Inventor: Kristopher Joseph Mueller
  • Patent number: 9009982
    Abstract: A drywall-cutting tool comprises a rotary blade of a thin design that cuts a very small kerf resulting in a smooth cut as well as a small amount of dust. Any dust that is generated is immediately vacuumed away by an on-board vacuum system that collects the dust in a removable dust bag. Additionally, the saw is provided with an adjustable depth mechanism for the most common thicknesses of drywall. This feature allows for accurate cuts, especially in remodeling scenarios where drywall must be cut without damaging other building components behind the drywall.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: April 21, 2015
    Inventor: Simon J. Sedgwick
  • Publication number: 20150040408
    Abstract: A power tool includes a housing and a hook assembly. The hook assembly includes a hook support and a hook member. The hook support is rotatably attached to the housing for rotation about a first axis. The hook member has a shank portion and a hook portion. The shank portion defines a second axis that is transverse to the first axis and is configured to rotate with respect to the hook support about the second axis. The hook portion extends in a radial direction from the shank portion. The rotation of the hook support about the first axis alters an orientation of the shank portion of the hook member with respect to the housing, and the rotation of the shank portion with respect hook support alters the radial direction of the hook portion.
    Type: Application
    Filed: August 6, 2014
    Publication date: February 12, 2015
    Inventors: Noel Francis, Brady Groth, Marco Laubach
  • Publication number: 20150020391
    Abstract: A hand-held power tool includes a motor having a stator and a rotor, the motor being configured to rotate the rotor at a speed of at least 40,000 rpm, an output shaft directly driven by the rotor, a tool accessory shaft configured to support a tool accessory, and a two-stage speed reducing transmission operably connecting the output shaft to the tool accessory shaft. The two-stage speed reducing transmission is configured to drive the tool accessory shaft at a rate less than the rotor speed, for example, at a rate less than or equal to 37.5% of the rotor speed.
    Type: Application
    Filed: January 15, 2014
    Publication date: January 22, 2015
    Applicant: MAKITA CORPORATION
    Inventors: Kenji ABE, Masayoshi OKUMI, Hidenori NAGASAKA, Motohiro OMURA, Masaaki FUKUMOTO, Kenji SHIBATA, Nobuyasu FURUI, Masanori HIGASHI, Kiyoshi AOYAMA
  • Patent number: 8935857
    Abstract: A cutting tool includes a tool unit including an electric motor, a rotary cutting blade rotatably driven by the electric motor, and a blade case covering at least apart of the rotary cutting blade. An electric component is disposed within the blade case at a position capable of being cooled by a flow of air produced by the rotation of the rotary cutting blade.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: January 20, 2015
    Assignee: Makita Corporation
    Inventor: Hirotomo Inayoshi
  • Publication number: 20140363621
    Abstract: A cap cover for boards made from a polymer or a wood/polymer composite. Caps having a top surface and lips extending downward from the leading edge forming a generally U-shaped lip. to be installed over the trimmed deck board have downwardly extending leading edges forming a generally U-shaped cap for installation over the top surface and both side surfaces of the deck boards. The system includes a board trimming and shaping rotary saw tool. The protective board caps are fastened to the deck boards in one of three ways. The protective caps may include means of attachment such as laterally extending barbs or teeth which snap by the bottom lateral edges of the trimmed deck boards and catch on the edges. The caps may also be used to cover fencing boards or any other wood member exposed to sun, rain, or snow to protect the wood from rotting.
    Type: Application
    Filed: June 11, 2014
    Publication date: December 11, 2014
    Inventor: Thang Ngo
  • Patent number: 8857067
    Abstract: A saw assembly includes a housing, a motor, a worm gear, and a drive member. The housing defines an interior space. The motor is positioned in the housing and has a motor shaft, the motor being configured to rotate the motor shaft about a first axis. The worm gear is positioned in the housing and has a worm gear shaft. Rotation of the motor shaft causes rotation of the worm gear shaft. The drive member is operatively coupled to the worm gear. Rotation of the worm gear shaft causes movement of the drive member in a repeating pattern. The worm gear shaft includes a bore structure defining a blind bore and an opening leading to the blind bore. The bore structure defines a set of internal threads that are spaced apart from the opening. The motor shaft includes a set of external threads.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: October 14, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Jaime Moreno
  • Patent number: 8857066
    Abstract: A power saw includes an electric motor, an impact assembly, and a blade retaining assembly. The impact assembly is coupled to an output shaft and includes a hammer member and an anvil member. The blade retaining assembly is coupled to the impact assembly and includes a blade coupling configured to connect to a saw blade. The impact assembly is configured to operate in a first mode when a mechanical load on the blade retaining assembly is below a threshold value. The impact assembly is configured to operate in a second mode when the mechanical load on the blade retaining assembly is greater than or equal to the threshold value. The hammer member is maintained in a fixed position relative to the anvil member when the impact assembly operates in the first mode. The hammer member intermittently impacts the anvil member when the impact assembly operates in the second mode.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: October 14, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Brian Haman
  • 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
  • Publication number: 20140245621
    Abstract: A circular saw includes a housing assembly and a drive motor assembly coupled to the housing assembly. An output member is driven by the drive motor assembly. A shoe is adjustably mounted to the housing assembly. A circular saw blade has a diameter of about 7.3 inches. The shoe can be adjusted to provide a depth of cut that is greater than or equal to about 3.0 inches.
    Type: Application
    Filed: April 14, 2014
    Publication date: September 4, 2014
    Inventor: Robert S. Gehret
  • Publication number: 20140245622
    Abstract: A circular saw includes a housing assembly and a drive motor assembly coupled to the housing assembly. An output member is driven by the drive motor assembly. A shoe is adjustably mounted to the housing assembly. A circular saw blade has a diameter of about 7.3 inches. The shoe can be adjusted to provide a depth of cut that is greater than or equal to about 3.0 inches.
    Type: Application
    Filed: April 14, 2014
    Publication date: September 4, 2014
    Inventor: Robert S. Gehret
  • Patent number: 8813375
    Abstract: In a handheld cutting machine that is constructed such that a user holds the machine by hand and performs cutting processing while moving the same, in which a lower portion of a circular cutting blade protruded from a lower surface side of a base that is placed on a cutting object is covered by a movable cover, an enough clearance is set between a supporting annular ring of a movable cover and a rotating boss portion of a bearing box in order to smoothly open and close the movable cover while a ring spring is interposed between the supporting annular portion and an axial restricting portion to increase dust-proofness of the a movable cover support portion.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: August 26, 2014
    Assignee: Makita Corporation
    Inventor: Michio Okumura
  • Publication number: 20140215839
    Abstract: A power tool, for example, a portable circular saw, includes a fan, a motor configured to rotate the fan, an output part or shaft driven by the motor, a motor housing that houses the motor, a grip housing connected to the motor housing, a trigger associated with the grip housing, and a brake member configured to brake a rotation of the motor, the brake member being mounted inside the grip housing. The brake member may be a resistive element of a rheostatic braking system. The housing and fan are configured such that cooling air is directed to cool the brake member.
    Type: Application
    Filed: January 24, 2014
    Publication date: August 7, 2014
    Applicant: MAKITA CORPORATION
    Inventors: Kenji ABE, Yusuke HIRATA, Tatsuya Nagahama
  • Patent number: 8793885
    Abstract: A handheld engine-driven cutter is provided with a disk blade and a four-stroke engine that drives the disk blade. By employing the four-stroke engine, exhaustion of unburned gas and fuel consumption can be reduced. The engine cutter is further provided with a filter through which air provided to the four-stroke engine passes, a carburetor that mixes fuel and the air that passed through the filter, and a casing that houses the filter and the carburetor. The filter and the carburetor are arranged to align on a straight line along a direction of flow of the air passing through the filter and the carburetor.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: August 5, 2014
    Assignee: Makita Corporation
    Inventors: Masaki Sugiyama, Tetsuya Hasegawa, Masaki Kondo, Tomonobu Nashimoto, Masayoshi Okumi, Takashi Miyazaki
  • Publication number: 20140208600
    Abstract: A saw assembly including a housing, a motor, a first bevel gear, and a second bevel gear. The motor is located in the housing and includes a motor shaft configured for rotation relative to the housing. The first bevel gear is operably connected to the motor shaft for rotation with the motor shaft. The second bevel gear is operably engaged with the first bevel gear, such that rotation of the first bevel gear causes rotation of the second bevel gear. The arbor assembly is operably connected to the second bevel gear. The arbor assembly is accessible for mounting an accessory thereto from an accessory side of the housing. The arbor assembly defines a first axis of rotation. The first bevel gear is located between the second bevel gear and the accessory side of the housing along the first axis of rotation.
    Type: Application
    Filed: April 1, 2014
    Publication date: July 31, 2014
    Applicants: Robert Bosch GmbH, Robert Bosch Tool Corporation
    Inventors: Jaime Moreno, Kevin Wasielewski, Arturo Castro, Philip Branker
  • Patent number: 8776657
    Abstract: A blade mounting assembly for mounting a rotary blade to an arbor comprises an outer washer including a hub configured to extend through a bore of the blade, the hub defining a central bore sized to receive a spindle of the arbor. The hub further includes a locating surface arranged to contact the shoulder when the spindle extends through the central bore. The washer includes an engagement surface contacting the left side face of the blade when the hub extends through the bore of the blade. The engagement surface is disposed a fixed axial distance from the locating surface relative to the length of the hub. A fastener engages the outer washer to the arbor with the locating surface in contact with the shoulder. The assembly further includes a biasing element configured to be disposed over the hub between the shoulder and the right side face of the blade.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: July 15, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Gregory A. Menze
  • Patent number: 8776384
    Abstract: A depth of cut scale is provided for a circular saw having a foot, a pivoting assembly (including a rotary saw blade) pivotably mounted to the foot, and a depth of cut adjustment mechanism operable to lock the pivoting assembly at a depth of cut (DOC) orientation relative to the foot. The depth of cut scale includes a shelf associated with and pivotable with the pivoting assembly. The shelf includes an upper surface bearing indicia indicative of DOC. An elongated element is fixed at one end relative to the pivoting assembly and includes a pointer adjacent an opposite end arranged to point to the indicia on the upper surface. The pointer is fixed in relation to the shelf as the shelf pivots with the pivoting assembly. The elongated element may be a flexible element that is maintained in tension overlaying the upper surface, or a cantilevered arm.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: July 15, 2014
    Assignee: Robert Bosch GmbH
    Inventor: James Richard Hartmann
  • Patent number: 8739417
    Abstract: A circular saw in which cutting speed of a saw blade is smoothly controlled. A speed change mechanism of a circular saw includes first and second rotating shafts disposed parallel to each other, and first and second gear trains having different gear ratios and each having a combination of a drive gear and a driven gear as one unit which are engaged with each other and transmit torque of the first rotating shaft to the second rotating shaft. A torque transmission path via the first gear train is defined as a first power transmission path and a torque transmission path via the second gear train is defined as a second power transmission path, and the transmission path is switched between the first power transmission path and the second power transmission path.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: June 3, 2014
    Assignee: Makita Corporation
    Inventors: Manabu Tokunaga, Shinji Hirabayashi, Ryu Hashimoto
  • Patent number: 8726526
    Abstract: A portable cutting machine is provided with a cutting machine main body, a surface plate rotatably supported by the cutting machine main body, a saw blade supported by the cutting machine main body rotatably around a first axis, and a lower guard supported by the cutting machine main body rotatably around a second axis. The first axis is located on one side of the surface plate. A part of the saw blade passes through an opening portion formed to penetrate through the surface plate and is exposed to the other side of the surface plate. The part of the saw blade exposed to the other side is covered by the lower guard. The first axis is parallel to the second axis. The first axis is located closer to a side of the surface plate than the second axis.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: May 20, 2014
    Assignees: Max Co., Ltd., Ryobi Ltd.
    Inventors: Kazunobu Yoshimura, Tomofumi Ichiba, Takuma Nonaka, Atsuhito Okada
  • Patent number: 8713806
    Abstract: A power tool includes a power source, a speed change mechanism and a tool bit. The speed change mechanism includes first and second rotating shafts disposed parallel to each other, a first power transmission path provided with a first gear train and a first clutch and a second power transmission path provided with a second gear train and a second clutch. The power transmission path is switched between the first power transmission path and the second power transmission path while the first and second gear trains are held engaged, by shifting of the first and second clutches between the power transmission state and the power transmission interrupted state according to a load applied to the tool bit. The speed change mechanism further includes a switching retaining mechanism, a switching preventing mechanism, a switching set value adjusting mechanism or a switching mechanism.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: May 6, 2014
    Assignee: Makita Corporation
    Inventors: Manabu Tokunaga, Shinji Hirabayashi, Ryu Hashimoto
  • Patent number: 8695224
    Abstract: A circular saw includes a housing assembly and a drive motor assembly coupled to the housing assembly. An output member is driven by the drive motor assembly. A shoe is adjustably mounted to the housing assembly. A circular saw blade has a diameter of about 7.3 inches. The shoe can be adjusted to provide a depth of cut that is greater than or equal to about 3.0 inches.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: April 15, 2014
    Assignee: Black & Decker Inc.
    Inventor: Robert S. Gehret
  • Patent number: 8683706
    Abstract: A handheld engine-driven cutter is provided with a disk blade and an engine that drives the disk blade, a filter through which air provided to the four-stroke engine passes, a carburetor that mixes fuel and the air that passed through the filter, a casing that houses the filter and the carburetor, at least one operation member that is operated by a user and connected to the carburetor via a link, and a shaft that is connected to the casing and supports the operation member in a swingable manner. A shaft receiving groove that supports the shaft is formed in the casing.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: April 1, 2014
    Assignee: Makita Corporation
    Inventors: Masayoshi Okumi, Masaki Kondo, Tomonobu Nashimoto, Katsumi Tozawa
  • Patent number: 8677634
    Abstract: A power tool is provided with a perforated material remover to remove perforated material from power tool cutting implements. The power tool also includes a rip guide which has a long guide edge and two attachment points to the shoe/base of the saw. The rip guide is attached to the base/shoe via a pair of L-shaped openings that accept L-shaped support arms of the rip guide. The rip guide can also be folded for compact storage. The power tool also includes dual bevel scales for quickly and easily setting the bevel angle on the power tool.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: March 25, 2014
    Assignee: Black & Decker, Inc.
    Inventors: Richard C. Nickels, Jr., David L. Wikle, Tim Bowman, James R. Parks, Jonathan D. Bigden, Jeffrey Peck, Mei Ling Cheng, Hung Jung Chaing, Chun Chieh Huang
  • Patent number: 8671581
    Abstract: An undercut saw including a motor, a drive shaft rotated by the motor, a blade mount mechanically linked to the drive shaft, the blade mount allowing a saw blade to be mounted and a fixed blade guard circumscribing a portion of the saw blade. The fixed blade guard includes a top plate and a height adjustment skirt in telescoping attachment joined by fasteners. A guide washer with a fastener assembly is configured to move up and down in a slot on the height adjustment skirt. Turning a lead threaded member raises and lowers the top plate.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: March 18, 2014
    Assignee: Crain Cutter Company, Inc.
    Inventors: Lance D. Crain, Tan D. Nguyen
  • Patent number: 8640345
    Abstract: A saw assembly includes a housing, a drive member, a motor, a switch, a trigger, a lockout lever, a stop structure, and a lock-on member. The housing defines an interior space, and has a forward housing portion defining a forward housing opening and a rearward housing portion defining a rearward housing opening. The drive member extends through the forward housing opening, and is configured to be moved in a repeating pattern. The motor is positioned in the interior space and is configured to move the drive member in the repeating pattern. The switch is positioned in the interior space and has an actuator movable between an actuated and a deactuated position. When the switch is in the actuated position, the motor moves the drive member in the repeating pattern, and when the switch is in the deactuated position, the motor does not move the drive member in the repeating pattern.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: February 4, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Jaime Moreno
  • Publication number: 20140000118
    Abstract: A toe-kick saw having a yieldable spindle extension is disclosed. At least one nub, as a transfer member, projects from a first or a second drive plate. The nub is engageable with a depression, slot or other nub receiving area on the other drive plate, to couple and uncouple the plates. In an engaged condition, the drive plates, a secondary spindle, a blade mount and a circular saw blade spin with the saw motor spindle. In a disengaged condition, the first drive plate spins with the saw motor spindle while the second drive plate, secondary spindle, blade mount and saw blade are disengaged from the first drive plate and the saw motor spindle. A biasing mechanism presses the second drive plate towards the first drive plate. A further biasing mechanism may press the second plate towards the first plate with more force when the plates are coupled than when decoupled.
    Type: Application
    Filed: August 29, 2013
    Publication date: January 2, 2014
    Applicant: Crain Cutter Company, Inc.
    Inventor: Greg Chambers
  • Patent number: 8595944
    Abstract: A handheld engine-driven cutter is provided with a disk blade and an engine that drives the disk blade, a filter through which air provided to the four-stroke engine passes, a carburetor that mixes fuel and the air that passed through the filter, a casing that houses the filter and the carburetor, at least one operation member that is operated by a user and connected to the carburetor via a link, and a shaft that is connected to the casing and supports the operation member in a swingable manner. A shaft receiving groove that supports the shaft is formed in the casing.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: December 3, 2013
    Assignee: Makita Corporation
    Inventors: Masayoshi Okumi, Masaki Kondo, Tomonobu Nashimoto, Katsumi Tozawa
  • Publication number: 20130205604
    Abstract: A shaft bearing device for a hand-held power tool, in particular for an angle grinder and/or a circular saw, includes at least one first support unit and at least one second support unit which are intended to axially and/or radially support a bearing element of a shaft. At least one of the at least two support units is formed at least partially by a plate element that has at least one axial and/or radial bend.
    Type: Application
    Filed: June 6, 2011
    Publication date: August 15, 2013
    Applicant: Robert Bosch GmbH
    Inventors: Florian Esenwein, Thomas Schomisch
  • Patent number: 8495940
    Abstract: A tool unit for a cutting device includes a rotary blade, a blade case for covering at least a part of the blade case, and a drive device mounted to the blade case for rotatably driving the rotary blade. A handle is attached to the drive device. The blade case has a front support portion. The handle has a rear support portion. When the tool unit is used for a portable cutting device, the front support portion can be vertically pivotally supported by a front portion of the base, and the rear support portion can be supported by a guide member such that a position of the rear support portion can be changed relative to the guide member for enabling adjustment of a cutting depth of the rotary blade into the workpiece. When the tool unit is used for a table cutting device, the front support portion can be vertically pivotally supported by the table.
    Type: Grant
    Filed: February 3, 2009
    Date of Patent: July 30, 2013
    Assignee: Makita Corporation
    Inventors: Hideki Abe, Masahiko Miura
  • Publication number: 20130185947
    Abstract: A circular saw includes a footplate and an upper guard coupled to a saw blade. The footplate has a width between two lateral edges in a direction perpendicular to the saw blade. The upper guard has a radius extending from the axis of the blade to the outermost surface of the upper guard in the radial direction. A DC brushless motor is drivingly coupled to the saw blade and is disposed above the footplate. The motor has a rotational axis within forty five degrees of parallel to the width of the footplate, or within forty five degrees of parallel to the radius of the upper guard. The motor extends towards one of the lateral edges of the footplate in the width direction, or towards the outermost surface of the upper guard in the radial direction.
    Type: Application
    Filed: September 4, 2012
    Publication date: July 25, 2013
    Applicant: Robert Bosch GmbH
    Inventors: Andrew Stuart Barkley, Jonathan Richard Wray, James Earl Fleeger, Ernest John Fischer
  • Publication number: 20130174427
    Abstract: A power tool is provided with a perforated material remover to remove perforated material from power tool cutting implements. The power tool also includes a rip guide which has a long guide edge and two attachment points to the shoe/base of the saw. The rip guide is attached to the base/shoe via a pair of L-shaped openings that accept L-shaped support arms of the rip guide. The rip guide can also be folded for compact storage. The power tool also includes dual bevel scales for quickly and easily setting the bevel angle on the power tool.
    Type: Application
    Filed: July 11, 2012
    Publication date: July 11, 2013
    Applicant: BLACK & DECKER INC.
    Inventors: Richard C. Nickels, JR., David L. Wikle, Tim Bowman, James R. Parks, Jonathan D. Bigden, Jeffrey Peck, Mei Ling Cheng, Hung Jung Chaing, Chun Chieh Huang
  • Patent number: 8438740
    Abstract: A circular saw includes a base plate, a saw blade assembly pivotably mounted to the base plate, and a bevel adjustment assembly operable to adjust the bevel angle of the saw blade assembly by rotation of an axle supported on the base plate. A release mechanism includes two torsion springs each having a coil portion wound around the axle, an anchor leg held in a substantially fixed position relative to the axle and a release leg arranged to move relative to the axle. A manually operable release element is configured to substantially simultaneously move the release leg of each of the torsion springs in a direction to unwind the coil portion of each spring from about the axle.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: May 14, 2013
    Assignee: Robert Bosch GmbH
    Inventor: Ernest Fischer
  • Patent number: 8424213
    Abstract: A circular saw has a housing, a direct current motor, a battery assembly, a handle having first and second ends, a circular saw blade and a base plate. The motor is located outside of an area defined by the radius of the circular blade and between the first and second ends of the handle and the blade is laterally aligned with the handle. The circular saw also has a center of gravity which lies close to the plane defined by the saw blade, is below the handle and is within the length of the base plate. As a result of this arrangement, the circular saw of the present invention reduces the influence of the torque created during a cutting operation and improves the balance and operation of the circular saw.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: April 23, 2013
    Assignee: Chervon Limited
    Inventor: Masatoshi Fukinuki
  • Patent number: 8388415
    Abstract: A power cutter comprising: a housing 2; an engine 24 mounted within the housing 2; a support arm 7 mounted on the housing and which projects forward of the housing; a blade mounting mechanism 70,90, 86, 92 rotatably mounted on the end of the support arm and which is capable of being rotationally driven by the engine 24 when the engine is running; a liquid fuel aeration mechanism 126 to generate aerated fuel for the engine; an air intake 314 for the provision of air for the liquid fuel aeration device 126; an air filtration mechanism 316 to filter the air drawn in from the air intake for the liquid fuel aeration mechanism; a fuel tank 124 for providing fuel to the liquid fuel aeration mechanism; and an exhaust 146 through which the exhaust gases generated by the operation of the engine are expelled; wherein the air filtration mechanism comprises an air filter 320 comprising a plurality of pleats which hang substantially vertically downwardly when the power cutter is in its standard orientation.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: March 5, 2013
    Assignee: Black & Decker Inc.
    Inventors: Martin Soika, Stefan Sell, Horst Grossman
  • Patent number: 8291804
    Abstract: Drive unit with a rotating saw blade which is hinged inside of a protective hood, for connection to a robot, shaped by an enclosure that can be connected to the robot in which a shaft is positioned, by means of which the saw can be powered under intermediate connection to a gearbox. The saw blade is held between two firmly connected internal rings which are arranged on both sides of the saw blade and contain it, as well as being connected to each other. The rings are rotatably mounted within non-rotating external rings that are connected to the protective hood. The device that is formed by the saw blade, the internal rings and the external rings is fastened in a removable way to a drive hub that is powered by the gearbox.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: October 23, 2012
    Assignee: Schmid & Wezel GmbH & Co.
    Inventor: Erich Mammel
  • Patent number: 8291800
    Abstract: A combination power tool with a machine base, an independently operable portable circular saw, and a connection device for fastening the portable circular saw to the machine base to form a miter saw. The portable circular saw has a power supply unit including a first power socket that is provided at the front side of the portable circular saw and selectively electrically connectable to the motor of the portable circular saw, a second power socket provided at the rear side of the portable circular saw and selectively electrically connectable to the motor of the portable circular saw, and a power cable for connecting an external power source to one of the first power socket and the second power socket.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: October 23, 2012
    Assignee: Rexon Industrial Corp., Ltd.
    Inventors: Yen-Chih Chang, Cheng-Hung Chiu