Rotary Patents (Class 30/388)
  • 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
  • Patent number: 8276281
    Abstract: A circular saw includes a housing, an electrical motor mounted in the housing, a base plate disposed below the housing, a saw blade attached to the housing and driven by the electrical motor, and an alignment indication assembly coupled to the housing. The saw blade has a portion below the base plate and can be tilted with respect to the base plate in a transverse direction. The alignment indication assembly has an indication member with an indicating end. The indication member is movable relative to a rotation center of the saw blade when the saw blade is being tilted with respect to the base plate so that the indicating end is maintained in front of and in line with the saw blade all the time.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: October 2, 2012
    Assignee: Positec Power Tools (Suzhou) Co., Ltd.
    Inventor: Shisong Zhang
  • Patent number: 8245408
    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: May 26, 2011
    Date of Patent: August 21, 2012
    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 Chiang, Chun Chieh Huang
  • Patent number: 8230606
    Abstract: The electric tool includes a base having an opening portion and a bottom face; a blade being projected downward from the bottom face of the base through the opening portion of the base, the blade being capable of cutting while sliding the bottom face of the base on an upper face of a work piece; a motor driving the blade; a housing accommodating the motor. The bottom face of the base is at least partially coated with a resin including fluorine.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: July 31, 2012
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Kenichirou Yoshida, Yoshio Osada, Mizuho Nakamura, Satsuo Sato, Junichi Kamimura, Takashi Kawamata
  • Patent number: 8215295
    Abstract: A rotatable cutting tool unit of a tool assembly for a cutting machine that is used in conjunction with an associated method of cutting provides several novel aspects. The tool arrangement, which includes two tool units, includes first and second disk-shaped tools rotatable about an axis. The tools define maximum tool arrangement boundaries along the axis. A driving arrangement, at an axial location between the first and second tools, supports the first and second tools for rotation and transfers driving force. A radially outer periphery of the driving arrangement is at a radius less than a radius of a peripheral cutting edge portion of the first tool and less than a radius of a peripheral cutting edge portion of the second tool.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: July 10, 2012
    Assignee: Husqvarna AB
    Inventors: Ove Donnerdal, HÃ¥kan Pinzani, Mari Albinsson
  • Patent number: 8215022
    Abstract: A food product slicer includes a base and a knife mounted for rotation relative to the base. A slide rod extends in a direction past the knife. A carriage assembly is mounted for reciprocal movement back and forth past a cutting edge of the knife. At least one bearing arrangement connects the carriage assembly to the slide rod to facilitate the reciprocal movement of the carriage assembly. The bearing arrangement includes a lubricant reservoir. A bearing bracket holds a bearing that rides on the slide rod. The lubricant reservoir is fluidly connected to deliver lubricant to the slide rod in proximity to the bearing.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: July 10, 2012
    Assignee: Premark FEG L.L.C.
    Inventors: Fariborz Feizi, Shahram Shariff, Brian Stump
  • Patent number: 8186067
    Abstract: A portable circular saw includes a housing, including a motor, a circular saw blade, a saw cover, and a light irradiation unit. The blade is driven by the motor for cutting in a cutting direction. The circular saw blade has one side surface and another side surface. The saw cover is provided to the housing for partially covering the circular saw blade. The light irradiation unit is provided on the saw cover. The light irradiation unit includes a first irradiation device located on the one side surface side of the blade and a second irradiation device located on the another side surface side of the blade for emitting a light to illuminate a region including a leading end portion of the circular saw blade and a spot on the cutting object. The spot is ahead of the leading end portion in the cutting direction.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: May 29, 2012
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Miyoji Onose, Hideaki Terashima, Shinji Takano
  • Patent number: 8182316
    Abstract: The invention discloses an oscillatingly driven machine tool, having an oscillatory drive for driving a drive shaft about its longitudinal axis, having a flange provided on the drive shaft against which an oscillatory tool can be clamped by spring force via a counter flange, and having a displacing mechanism for displacing the counter flange between a working position in which the oscillatory tool is clamped by a spring between the flange and the counter flange and a released position in which the counter flange can be detached from the flange.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: May 22, 2012
    Assignee: C. & E. Fein GmbH
    Inventor: Andreas Peisert
  • Patent number: 8118018
    Abstract: An attachment for an existing commercial concrete saw to convert the vertically cutting saw to a horizontally cutting saw. The saw's vertically oriented saw blade and associated horizontal shaft are first removed and the attachment is installed on the saw. The attachment has a gear box with pulley for receiving power from a pulley on the saw via a drive belt that extends around both pulleys. The gear box has a drive shaft extending vertically downward out of the gear box. Either a horizontal saw blade or cup brush can be removably attached to the drive shaft so that the saw can be used for making horizontal cuts in concrete or alternately the cup brush can be used to remove striping off the surface of a road. The gear box and the horizontal saw blade or cup brush are water cooled and lubricated.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: February 21, 2012
    Assignee: The John T. Sherment Trust
    Inventor: John T. Sherment
  • Patent number: 8104183
    Abstract: A portable cutting device capable of changing and adjusting a cutting depth of a circular saw blade relative to a base with lesser labor. A saw cover is pivoted on the base to change the cutting depth. An adjustment guide extends from the base in a pivotally moving direction of the saw cover in a superposed relation to the saw cover. A tightening unit is disposed to the saw cover at a position superposed with the adjustment guide and the saw cover for providing a selective tightening between the saw cover and the adjustment guide. The tightening unit includes a shaft part extending through the saw cover and the adjustment guide, a pivot operation part pivotally movable about an axis of the shaft part, and an urging part disposed over the shaft part and movable by the pivot operation part in the axial direction of the shaft part.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: January 31, 2012
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Mizuho Nakamura, Shinji Takano, Hideaki Terashima, Hiroyuki Saitou
  • Publication number: 20110308097
    Abstract: Cutting tool for the severance of board-like or web-like workpieces (P), in particular of building boards, floorboards, rigid or flexible material or the like, also as sheet or web material, with a counterbearing, particularly in the form of a support (1d), and with at least one circular cutting blade (2) which is mounted rotatably above the counterbearing (1d) by means of a holding arrangement (3), in such a way that, in use, teeth of the circular cutting blade (2) penetrate into the board-like workpiece (P) to be severed, and, during the rotation of the circular cutting blade (2; 20), push the workpiece (P) forwards along the at least one circular cutting blade (2; 20), while at the same time the workpiece is sheared off on the counterbearing (1d). The holding arrangement (3) is connected to the counterbearing (1d) such that the forces occurring during severance can be absorbed.
    Type: Application
    Filed: July 24, 2009
    Publication date: December 22, 2011
    Inventor: Thomas Vollrath
  • Patent number: 8061043
    Abstract: A power tool, a saw and a circular saw. The power tool may include a handle including a support portion movably supportable on the housing portion and extending substantially about the circumference of the housing portion. The support portion may include a second end movable relative to a first end such that the support portion selectively applies a force to the housing portion. The saw may include a bevel angle detent mechanism in which one of the detent member and the recess is angularly adjustable relative to the associated one of the detent support and the recess support to adjust the predetermined bevel angle position. A bevel angle detent mechanism may include an engagement operating assembly operable between a detent engagement-enabled condition, in which the detent member is engageable in the recess, and a detent engagement-prevention condition, in which the detent member is prevented from engaging the recess. The circular saw may include a spindle lock assembly.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: November 22, 2011
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Douglas W. Allen, Scott R. Fischer, Peter A. Banach, Steven L. Berg
  • Patent number: 8056243
    Abstract: A power tool comprising a housing displaceably mounted to a foot plate, a blade, a motor, an electric switch and an interlock for controlling movement of the housing with respect to the foot plate. The interlock has a control button mounted to one of the housing or foot plate which cooperates with a channel fixed in relation to the other of the housing or foot plate. The control button can select between a plunge cut mode wherein the blade can protrude below the foot plate, or a blade change mode wherein the blade is prepared for a blade change operation. The channel comprises a major leg in communication with a minor leg. Cooperation between the button and the major leg selects the plunge cut mode. Cooperation between the button and the minor leg selects the blade change mode. The interlock may also comprise a housing lock and a spindle lock.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: November 15, 2011
    Assignee: Black & Decker Inc.
    Inventors: Paul Sargeant, Scott Keenlyside, Roger Thomas, Rainer Herting
  • Patent number: 8051758
    Abstract: A power tool comprises a detection system for detecting a situation where an operator using a power tool of the type which has an exposed rotating component contacts the rotating component, and a protection system for minimizing the possibility of an operator being injured by contacting the rotating component.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: November 8, 2011
    Assignee: Robert Bosch GmbH
    Inventor: Erin F. Eppard
  • Patent number: 8037614
    Abstract: A technique is provided which is effective in preventing chips generated during cutting operation on a workpiece from being accumulated in a region ahead in a cutting direction. A representative cutting machine includes a motor, a blade, a body housing having a first region that houses the motor and a second region that covers the blade and projects forward of a front surface of the first region, a base, an angular plate, an outlet formed in the body housing, an opening and a blocking part. The blocking part prevents the air discharged from the outlet from flowing out laterally with respect to the moving direction of the base through a clearance between a front end of the second region and the one end of the angular plate and thereby helps the air discharged from the outlet flow into the opening.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: October 18, 2011
    Assignee: Makita Corporation
    Inventors: Kai Yang, Kenji Abe
  • Patent number: 8037610
    Abstract: A powered vinyl groover includes a motor attached to a circular blade and a blade housing for covering the circular blade. The blade housing includes a duct to carry cuttings into a collection bag. Near an inlet hole of the duct is a fin, which may be a raised surface on any interior wall of the blade housing extending into the blade housing as close as possible to the blade. The fin causes airflow from the blade to be redirected towards the inlet hole of the duct so that more cuttings enter the duct and are carried by the duct through to an outlet hole to a collection bag mountable over the outlet hole of the duct. The fin may be integral with the blade housing or attached to it, and a fin may also be added to existing groovers.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: October 18, 2011
    Assignee: Crain Cutter Co., Inc.
    Inventor: Gregory Joseph Chambers
  • Patent number: 7984556
    Abstract: A cable cutter for attachment to a power drill has a housing, first and second cutting blades and a drive assembly releasably engageable with the chuck of the drill. The drive assembly includes a worm mounted on a drive and a worm gear and a drive gear mounted on a main shaft. The worm and worm gear are in engagement, as are the drive gear and one of the cutting blades. The housing includes a main plate and an end cap secured to the main plate, with the end cap receiving the drive gear and defining a cut away portion adjacent to the stationary blade to allow the movable blade to pass through the cut away portion for direct engagement with the drive gear. The end cap defines a counterbore facing the main plate, with the counterbore receiving a bearing supporting one of the ends of the main shaft.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: July 26, 2011
    Assignee: Ideal Industries, Inc.
    Inventor: Bruce P. Konen
  • Publication number: 20110167651
    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: Application
    Filed: June 9, 2009
    Publication date: July 14, 2011
    Applicant: MAKITA CORPORATION
    Inventors: Manabu Tokunaga, Shinji Hirabayashi, Ryu Hashimoto
  • Patent number: 7975388
    Abstract: A circular power saw (10), composed of a saw assembly (12) with a housing (14, 16) that encloses a motor and a saw blade (18) capable of being driven by the motor, and that includes a handle, whereby the saw assembly (12) is pivotably supported relative to a footplate (22) such that it can be adjusted between a minimum and maximum cutting depth, is protected against kickback by the fact that, during sawing, the saw assembly (12) is decoupled from handling forces acting on the saw blade (18), in particular from the handle (24).
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: July 12, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Fuchs, Eduard Gansel, Heiko Roehm
  • Patent number: 7971361
    Abstract: A portable circular saw has a housing and a baseplate. The housing carries a motor which is connected to a blade through a transmission mechanism. The baseplate includes a main baseplate and a secondary baseplate each of which has a bottom surface and the bottom surfaces are coplanar. At least a part of the blade passes though a slot formed in the main baseplate. The main baseplate includes a first edge and a second edge disposed on opposing sides of the blade. The secondary baseplate has at least two exchangeable positions. In a first position, the secondary baseplate is jointed or adjacent to the first edge of the main baseplate and, in a second position, the secondary baseplate is joined or adjacent to the second edge of the main baseplate.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: July 5, 2011
    Assignee: Chervon Limited
    Inventors: Masatoshi Fukinuki, Zhiguo Chen
  • Patent number: 7950156
    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: February 19, 2008
    Date of Patent: May 31, 2011
    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 Chiang, Chun Chieh Huang
  • Patent number: 7941929
    Abstract: A circular saw including a motor housing having a first end portion and a second end portion, a motor assembly disposed within the housing, a rotary blade assembly having a predetermined weight mounted to the first end portion of the motor housing, and a battery pack having a predetermined weight disposed on the second end portion of the motor housing. The battery pack and the rotary blade assembly are configured and arranged to be in longitudinal alignment with one another, and the longitudinal alignment of the battery pack with the rotary blade assembly promotes counterbalancing between the predetermined weight of the rotary blade assembly and the predetermined weight of the motor housing.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: May 17, 2011
    Assignee: Robert Bosch Tool Corporation
    Inventors: Mark Miklosz, Matthew Rybka
  • Publication number: 20110088267
    Abstract: A power tool for cutting a workpiece including a casing, an auxiliary handle assembly extending from the casing, a motor disposed at least partially in the casing, and a drive transmission operably coupled to the motor. The drive transmission outputs a driving force in response to an input from the motor. A spindle locking mechanism is provided that is selectively positionable between a retracted position spaced apart from the drive transmission and a locked position engaging the drive transmission. The spindle lock mechanism thereby prevents rotation of the drive transmission in response to actuation of a pad member. The pad member can be positioned adjacent to the auxiliary handle to permit single-handed holding of the power tool and actuation of the pad member.
    Type: Application
    Filed: October 26, 2010
    Publication date: April 21, 2011
    Applicant: BLACK & DECKER INC.
    Inventors: David L. Wikle, James R. Parks, Richard C. Nickels, JR.
  • Patent number: 7918030
    Abstract: Cutting tools (1) may include a lighting device (5). The lighting device may be mounted on a tool unit (3) adjacent to a grip portion (26). Preferably, the grip portion serves to protect the lighting device from being damaged by an external force. The tool unit may include a motor case (21) for accommodating a motor. The grip portion may extend from the motor case and the lighting device may be mounted on or within the motor case. The tool unit may further include a blade case (20) that at least partly covers a cutting blade (22). The blade case may be joined to the motor case via a joining portion J defined on the motor case. In this case, the lighting device is preferably disposed proximal to the joining portion. The lighting device may include at least a first light (5a) and a second light (5b) that are arranged and constructed to illuminate different areas.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: April 5, 2011
    Assignee: Makita Corporation
    Inventor: Toru Fukuoka
  • Patent number: 7905024
    Abstract: A drive wheel for centerless drive of an annular saw blade of a cutting machine. The drive wheel includes a drive ring having concentrically arranged first and second annular elements, each of which has a first beveled side surface located radially outward from a second beveled side surface. The second beveled side surfaces are in contact with one another and the first beveled side surfaces together define a wedge-shaped drive groove for the inner edge of an annular saw blade that is to be driven by the drive ring. Third and fourth annular elements are arranged concentrically with, and outboard to the first and second annular elements located therebetween. The third and fourth annular elements are configured to inwardly compress upon the first and second annular elements. An anti-relative-rotation member interconnects the first and second annular elements to prevent relative rotation therebetween while driving the annular saw blade of a cutting machine.
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: March 15, 2011
    Assignee: Aktiebolaget Electrolux
    Inventor: Stigbjorn Juhojuntti
  • Patent number: 7891101
    Abstract: A powered jamb saw is provided which is ideally suited for making corner cuts. A cylindrical housing for the shaft of the circular saw blade is mounted in a split bushing tensioned by a threaded bolt secured to and for rotation by a handle positioned so as to permit the workman to use both hands to position the jamb saw during its use in making cuts.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: February 22, 2011
    Inventor: Michael L. Brady
  • Patent number: 7856724
    Abstract: An electrical power tool includes a locking device (31) for securing the working tool (3) on a motor-driven shaft (2; 200), a device (10) for braking the shaft (2), a safety element (8) connected with the braking device (10) and an actuation switch (7) and having a safety position that corresponds to the braking position of the braking device (10) and a non-actuation position of the switch (7) in which the switch (7) cannot turn the shaft-driving motor (M) on, and a release position that corresponds to the release position of the braking device (10) and an actuation position of the switch (7), and a locking mechanism (21) operatively connected with the safety element (8) and the locking device (31) and displaceable between a locking position which corresponds to an unlocking position of locking device (31) and in which the safety element (8) is retained in its safety position, and a release position in which the locking device (31) is in its locking position, and the safety element (8) occupies its release po
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: December 28, 2010
    Assignee: Hilti Aktiengesellschaft
    Inventor: Markus Hartmann
  • Publication number: 20100299944
    Abstract: A preferred embodiment of a hand-operated flush cutting machine (1) comprises a front section (3) with a first and a second disc shaped cutter blade (7, 8) which are rotary about an axis of rotation (26) and mounted in the front end of an elongated tool carrier (11) having the substantial shape of a flat bar. The tool carrier is mounted to a rear section (2) of the machine. The rear section (2) is provided with a number of components, including a motor (17) for driving the cutter blades via a power transmission as well as handles (13, 16) and a control (25) for operating the machine. The first, right hand side cutter blade (7) has a first side, which does not face the second cutter blade. Said first side defines a first plane (21) which does not intersect any component in said front or rear sections.
    Type: Application
    Filed: December 13, 2007
    Publication date: December 2, 2010
    Applicant: HUSQVARNA AB
    Inventor: Tommy Hellberg
  • Patent number: 7841092
    Abstract: A hand-held circular saw designed for making square cuts on workpieces. The saw is equipped with a pair of retractable guide pins located near the rear of the blade; when both pins touch the front edge of the workpiece the saw's blade is automatically perpendicular to it. The saw is also equipped with at least one torsion spring that temporarily holds the saw's blade above the workpiece. Without moving the saw's base, the user turns on the saw, and pressing downwardly on its handle, lowers the blade into the workpiece, making a square cut with the accuracy of a cut-off saw. The guide pins can also be automatically or manually retracted to convert the improved saw back to a conventional saw.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: November 30, 2010
    Inventor: Klaus Dern
  • Patent number: 7836806
    Abstract: A cut alignment device for a rotary saw having a motor which spins a cutting unit which includes a rotary shaft driven by the motor, a circular blade having a central aperture through which the shaft fits, and a structural housing. The cut alignment device includes the structural housing defining two or more internal compartments, a battery power source carried within the structural housing, and a beam light source, operatively connected to this power source, and also located within the structural housing. The light source projects a light beam from the cutting unit directed slightly away from the plane of the rotary cutting tool or saw blade such that it never intersects the plane of the blade, to assist the operator in cutting accurately.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: November 23, 2010
    Inventor: Raymond J. Caluori
  • Patent number: 7814663
    Abstract: A modular power tool incorporates a modular drive system and modular handle set that is reversible for use with both a left hand and right hand configuration. The modular drive system and handle set of the modular power tool of this invention reduces the need for derivative circular saw designs by introducing common components.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: October 19, 2010
    Assignee: Black & Decker Inc.
    Inventors: Michael A. Zemlok, Keith Moore, Weston J. Van Wambeke
  • Patent number: 7805841
    Abstract: A modular power tool incorporates a modular drive system and modular handle set that is reversible for use with both a left hand and right hand configuration. The modular drive system and handle set of the modular power tool of this invention reduces the need for derivative circular saw designs by introducing common components.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: October 5, 2010
    Assignee: Black & Decker Inc.
    Inventors: Michael A. Zemlok, Keith Moore, Weston J. Van Wambeke
  • Publication number: 20100236807
    Abstract: An electrical combination including a driver drill capable of producing an average current draw of approximately 20-amps, a circular saw capable of producing an average current draw of approximately 20-amps, and a power tool battery pack operable to supply power to the driver drill and to the circular saw, the battery pack including a plurality of battery cells, the plurality of battery cells each having a lithium-based chemistry.
    Type: Application
    Filed: April 26, 2010
    Publication date: September 23, 2010
    Inventors: Todd W. Johnson, Dennis J. Grzybowski, Mark A. Kubale, Jay J. Rosenbecker, Gary D. Meyer, Jeffrey M. Zeiler, Kevin L. Glasgow, Karl F. Schuecher
  • Publication number: 20100192389
    Abstract: An electric cutting tool 100 includes: a body portion 2 accommodating a driving portion 6 for rotating a circular saw blade 1 and a power transmission mechanism for transmitting a power of the driving portion to the circular saw blade; and a surface table 5 supporting the body portion 2, in which the circular saw blade 1 is supported by a shaft 1a that is disposed between a shaft 6a of the driving portion 6 and the surface table 5. In such electric cutting tool 100, the power transmission mechanism is provided with a pair of helical gears 7c, 7d arranged on the same shaft, and the paired helical gears 7c, 7d have tooth traces directed in a same direction. According to such structure, in the electric cutting tool 100, thrust load can be reduced.
    Type: Application
    Filed: October 26, 2006
    Publication date: August 5, 2010
    Applicant: Ryobi Ltd
    Inventors: Atsuhito Okada, Katsutoshi Kouchiyama
  • Publication number: 20100180454
    Abstract: An electric saw device includes a first saw blade and a second saw blade. The first and the second saw blades are respectively driven by a small transmission shaft and a large transmission shaft to rotate in opposite directions. A round rib is disposed on an inner end surface of the first saw blade, and at least three recessed holes are arranged in a top end surface of the round rib at equal angle intervals. A steel ball is accommodated in each of the recessed holes, and protrudes out of the recessed hole. Protruding ends of the steel balls urge against an inner surface of the second saw blade, so as to limit a distance between the first saw blade and the second saw blade, and form a rolling friction when the first and the second saw blade rotate in the opposite directions. Further, a power output shaft of the electric saw device is joined with the small transmission shaft of the first saw blade through a key connection structure, so as to ensure that the saw blades do not tilt after installation.
    Type: Application
    Filed: January 21, 2009
    Publication date: July 22, 2010
    Inventor: CHUNG-CHI CHENG
  • Patent number: 7685914
    Abstract: A food slicer comprises a fan-cooled electrically powered motor driving a slicer blade. The motor is mounted within an enclosure which comprises at least one air intake port and at least one exhaust port on opposite sides of one nominally air-tight first partitioning wall within the enclosure to confine the flow of cooling air from the air intake port through the enclosure, then into intimate contact with the electrical windings and components within the frame of the motor. The motor frame is sealed into a closely conforming contacting aperture in the first partitioning wall. The fan is mounted immediately adjacent to a non-contacting aperture in a second partitioning wall within the enclosure juxtaposed the exhaust port.
    Type: Grant
    Filed: January 5, 2007
    Date of Patent: March 30, 2010
    Assignee: Edgecraft Corporation
    Inventor: Daniel D. Friel, Sr.
  • Publication number: 20100050446
    Abstract: A laminate flooring saw system which can be used for both rip cuts and miter cuts in one embodiment includes a fence, a base including a first locking member configured to cooperate with the fence to lock the fence along a first fence axis, a second locking member configured to cooperate with the fence to lock the fence along a second fence axis, the second fence axis perpendicular to the first fence axis and a support arm positioned above the base for supporting a power tool.
    Type: Application
    Filed: August 27, 2008
    Publication date: March 4, 2010
    Applicants: Credo Technology Corporation, 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: 7628102
    Abstract: It is an object of the invention to provide a dust collecting circular saw in which cooling air to cool the motor can be further effectively utilized. According to the present invention, a representative dust collecting circular saw may comprise a blade, a motor, a cooling fan, a dust case, a dust case cover and an air space between the dust case cover and the dust case. The cooling air to cool the motor is designed to be introduced into the air space. Therefore, according to the invention, heat of the dust case caused by hot chips collected within the dust case can be prevented from being transferred from the dust case to the dust case cover by the air space into which the cooling air is introduced. Thus, the user of the circular saw can securely be escaped from contacting any circular saw members heated by the hot chips within the dust case.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: December 8, 2009
    Assignee: Makita Corporation
    Inventors: Takahiro Kamiya, Tomonobu Nashimoto
  • Publication number: 20090293291
    Abstract: A circular saw including a motor housing having a first end portion and a second end portion, a motor assembly disposed within the housing, a rotary blade assembly having a predetermined weight mounted to the first end portion of the motor housing, and a battery pack having a predetermined weight disposed on the second end portion of the motor housing. The battery pack and the rotary blade assembly are configured and arranged to be in longitudinal alignment with one another, and the longitudinal alignment of the battery pack with the rotary blade assembly promotes counterbalancing between the predetermined weight of the rotary blade assembly and the predetermined weight of the motor housing.
    Type: Application
    Filed: August 7, 2009
    Publication date: December 3, 2009
    Applicant: Credo Technology Corporation
    Inventors: Mark Miklosz, Matthew Rybka