Portable Or Hand Tool (e.g., Dry Shavers) Patents (Class 310/47)
  • Patent number: 10913142
    Abstract: The electric tool including a motor having a stator and a rotor, a rotation shaft integrally rotating with the rotor, a casing accommodating the motor, a ventilating window disposed in the casing, a cooling fan sucking an air through the ventilating window to cool off the motor, a magnetic body disposed to the rotation shaft, a magnetic detection unit detecting a rotational position of the magnetic body, and a circuit substrate on which the magnetic detection unit is mounted. The circuit substrate and the magnetic body are disposed to be isolated from a wind path of a cooling wind generated by rotation of the cooling fan.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: February 9, 2021
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventor: Yuuki Takeda
  • Patent number: 10537472
    Abstract: The disclosure herein provides ophthalmic surgical systems, methods, and devices. In one embodiment, a handheld medical instrument for surgical procedures comprises a body having an exterior surface shaped to be held and manipulated by a human hand; a surgical tool extending from a distal end of the body; and a pressure-sensitive button for controlling operation of the surgical tool, the pressure-sensitive button comprising an actuation surface positioned adjacent the exterior surface of the body, the pressure-sensitive button further comprising a pressure detection device, the pressure detection device configured to enable output of a signal for controlling a function of the surgical tool, the signal being proportional to a position of the actuation surface.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: January 21, 2020
    Assignee: Alcon Pharmaceuticals Ltd.
    Inventors: Jeffrey David Brennan, Mark Humayun
  • Patent number: 10530220
    Abstract: A power tool with a combined printed circuit board (PCB) that reduces internal wiring of the power tool and provides a large amount of air flow to internal components. In some instances, the combined PCB has a surfboard shape and includes a motor control unit and power switching elements (Field Effect Transistors or FETs). The combined surfboard PCB is located above the trigger, but below the motor and drive mechanism. In other instances, the combined PCB has a doughnut shape and is located coaxially with a motor shaft. The combined PCB may be positioned between a doughnut-shaped control PCB and the motor.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: January 7, 2020
    Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
    Inventors: Matthew J. Mergener, Michael Kolden, William E. Check, Matthew P. Wycklendt, Andrew T. Beyerl, John W. Thiele, Todd C. Hunkins
  • Patent number: 10173311
    Abstract: An electric tool is provided. The electric tool prevents anomalies in motor rotation due to dust and moisture sucked in together with a cooling wind, and is configured such that rotational position detection operations and switch operations are not affected. In the electric tool which drives a brushless DC motor using a controller, a magnetic body for rotational position detection is provided on a rotation shaft which can rotate integrally with a rotor, Hall ICs are provided to detect the rotational position of the magnetic body and output a position signal to the controller, and the magnetic body and the Hall ICs mounted on a substrate are arranged in a region isolated from the wind path of the cooling wind generated by rotation of a cooling fan. The Hall ICs are accommodated in a housing filled with resin.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: January 8, 2019
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventor: Yuuki Takeda
  • Patent number: 9954418
    Abstract: A power tool includes a brushless motor having a stator and a rotor, which includes a rotary shaft extending in a front-rear direction of the power tool. The rotary shaft rotates a spindle that extends in an up-down direction of the power tool. A fan is fixedly coupled to the rotary shaft and rotates therewith. A switch is disposed rearward of the brushless motor and a controller is disposed rearward of the switch in the front-rear direction. A battery pack is disposed rearward of the controller. A main-body housing houses the brushless motor, the switch and the controller. The main-body housing includes a first tubular part, which houses the brushless motor, and a second tubular part, which houses the switch. The diameter of the second tubular part is smaller than the diameter of the first tubular part.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: April 24, 2018
    Assignee: MAKITA CORPORATION
    Inventors: Takahiro Kawakami, Masatoshi Nakahama
  • Patent number: 9680346
    Abstract: A screw motor includes a stator, a rotor that is rotatably received in the stator and includes a rotor core, and a screw shaft that is coupled to the rotor core to contact the rotor core.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: June 13, 2017
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Jinho Kim
  • Patent number: 9662760
    Abstract: A hand-held power tool, in particular an angle grinder, having a drive unit, has an electronically commutated electric motor and has an electronics system which is integrated in an appliance housing. The ratio of a weight of the hand-held power tool MHWZM to a nominal power PN is selected in such a way that, in a power range of from 0 to 1200 W, the ratio of the weight of the hand-held power tool MHWXM to the nominal power PN is at most 0.75 g/W*PN+1200 g, and, at a value of the nominal power of greater than 1200 W, the ratio of the weight of the hand-held power tool to the nominal power is at most 2.2*PN?540 g.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: May 30, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Manfred Schuele, Helmut Wanek, Cornelius Boeck, Daniel Barth, Joachim Schadow, Joerg Maute, Florian Esenwein, Manfred Lutz
  • Publication number: 20140139054
    Abstract: Electric motors are disclosed with coils which induce a magnetic flux field which by its relationship with ferromagnetic poles provide the motoring force without use of an auxiliary magnetic field. The motors may be employed with fixed or pivotably mounted brushes. Pivotable brushes for electric motor brushes are disclosed.
    Type: Application
    Filed: January 27, 2014
    Publication date: May 22, 2014
    Inventor: Anthony Freakes
  • Patent number: 8716908
    Abstract: A power tool in the form of an electric disc grinder has a driving motor for driving a grinding wheel that performs a grinding or polishing operation on a workpiece, a motor housing that houses the driving motor, a rear cover that is mounted to a rear end region of the motor housing and forms together with the motor housing a grip to be held by a user, and a power switch including an operating lever that extends longitudinally on both of the motor housing and the rear cover and is operated by gripping with a user's hand, and a switch part that is disposed within the rear cover and actuated by operation of the operating lever to control energization of the driving motor and connected to the operating lever through an opening.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: May 6, 2014
    Assignee: Makita Corporation
    Inventors: Shigeru Takeda, Shin Sugiura, Tadashi Fukumoto, Yoshifumi Morita
  • Patent number: 8607893
    Abstract: The cover is provided with engaging pieces that engage with a recessed groove provided on the outer peripheral surface of a hammer case and hold the cover on the hammer case to prevent the cover from being detached. The cover is also provided with bumper receiving portions extending from the front end of the cover and allowing the bumper to be externally attached to the cover, and engaging claws formed on the bumper receiving portions and engaging with engaged recessed portions formed on the inner peripheral surface of the bumper for holding the bumper to prevent the bumper from being detached from the cover. The cover with the bumper attached to the bumper receiving portions is provided to the hammer case.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: December 17, 2013
    Assignee: Makita Corporation
    Inventors: Ryunosuke Kumagai, Hidenori Nagasaka, Manabu Sugimoto
  • Patent number: 8596377
    Abstract: Three battery cells can be arranged such that one battery cell is situated on the front side of a handle portion and that the remaining two battery cells are situated on the rear side thereof while being arranged laterally side by side. Also, a handle portion can be generally of a triangular cross-sectional configuration whose apex portion is situated on the front side of the handle portion and whose base portion is situated on the rear side thereof; and the handle portion is grasped by bringing fingertips into contact with the apex portion (11a) on the front side.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: December 3, 2013
    Assignee: Makita Corporation
    Inventors: Tomoyuki Kondo, Manabu Sugimoto, Miyabi Ito, Eiji Kondo
  • Patent number: 8487488
    Abstract: In a dental, dental-medical or dental-technical handpiece, having an elongate grip sleeve there are provided at the rearward end of the grip sleeve coupling elements for the connection of the handpiece to a supply hose to be connected with a dental supply arrangement, and there are provided at the forward end of the grip sleeve a head section with a tool receiver for mounting a tool to be put into rotation. The handpiece further has an electric motor for driving a tool held by the tool receiver, which motor is completely integrated into the grip sleeve such that grip sleeve and motor form a unit.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: July 16, 2013
    Assignee: Kaltenbach & Voight GmbH
    Inventors: Bernhard Kuhn, Bernd Gugel
  • Patent number: 8464807
    Abstract: An electrical hand tool device comprises a ventilated housing body, which has inlet and outlet openings for cooling air flow and accommodates the electromotive components of the device, in particular, a motor that is excited by a permanent magnet and is powered by a battery, and a magnet that is provided in the area of the cooling air flow for collecting magnetic or magnetizable dust. In order to protect the electric motor, the device is designed in such a fashion that at least two magnets are provided in the axial direction between the inlet openings and the electromotive components of the device, and a means is provided, which electrically cooperates with the at least two magnets to determine whether a substantial amount of magnetizable dust has collected on the magnets, in which case, a control measure can be performed.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: June 18, 2013
    Assignee: Metabowerke GmbH
    Inventors: Markus Johnen, Wolfgang Stickel
  • Patent number: 8432073
    Abstract: A power generating device includes a carrier module, a stator module, a rotor module and a power generating module. The stator module is assembled to the carrier module, and has a first circuit board and a plurality of driving coils. The rotor module is located in an electromagnetic field, and has a multipolar magnetic rotor and a rotating axle. A magnetic field of the multipolar magnetic rotor interacts with the electromagnetic field to make the rotor module rotating relative to the stator module, and make the multipolar magnetic rotor producing a varying magnetic field. The power generating module is located in the varying magnetic field, and has a second circuit board and a plurality of induction coils. The induction coils induct the varying magnetic field to output an induction circuit to the second circuit board.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: April 30, 2013
    Assignee: Silicon Touch Technology Inc.
    Inventors: Chi-Lone Chang, Chi-Yuan Chin
  • Patent number: 8405258
    Abstract: A machine tool with a generator for generating electrical power is disclosed. The generator has a stator with a coil and a rotor with a magnet. The rotor is capable of moving relative to the stator. An air gap is formed between the rotor and the stator. The stator and the rotor comprise a material with a relative permeability greater than the relative permeability of air and are arranged in such a way that magnetic lines of force of the magnet are guided in a targeted manner with respect to the coil. The air gap between the stator and the rotor is configured in such a way that a large proportion of the lines of force emanating from the magnet are guided by the stator and the rotor.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: March 26, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Ludwig Schoen, Florian Esenwein
  • Patent number: 8368264
    Abstract: An electric cutting tool including a housing (1) and a motor (2). The motor (2) is removably mounted in a cavity arranged at the back end of the housing (2), and the outer diameter of the motor (2) is matched with the diameter of the cavity. A turnover opening back cover (3) is hinged at the opening at the back end of the cavity. The back cover (3) is locked with the housing (1) by means of a locking structure arranged on its side, and presses against the back end of the motor (2) after closing. A pair of electrode posts (21) are provided at the front end of the motor (2), and a pair of electrode sockets (18) corresponding one-to-one with the pair of electrode posts (21) are provided in the bottom surface of the cavity. A circumferential stop structure is provided between the radial outer surface of the motor (2) and the inner wall of the cavity.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: February 5, 2013
    Assignee: Beijing Montagne Medical Device Co. Ltd
    Inventor: Ximing Zhou
  • Patent number: 8353364
    Abstract: Three battery cells can be arranged such that one battery cell is situated on the front side of a handle portion and that the remaining two battery cells are situated on the rear side thereof while being arranged laterally side by side. Also, a handle portion can be generally of a triangular cross-sectional configuration whose apex portion is situated on the front side of the handle portion and whose base portion is situated on the rear side thereof; and the handle portion is grasped by bringing fingertips into contact with the apex portion (11a) on the front side.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: January 15, 2013
    Assignee: Makita Corporation
    Inventors: Tomoyuki Kondo, Manabu Sugimoto, Miyabi Ito, Eiji Kondo
  • Patent number: 8336155
    Abstract: A replacement head for an electromagnetic toothbrush drive includes a mechanical linkage assembly for converting linear drive motion into rotational movement of the brush head. The mechanical linkage assembly includes a fixed shaft and a lever arm that extend between a movable bottom member and a fixed top member, and a link member rotatably connected to the top member and the brush head. The lever arm pivots about a fulcrum formed in the top member, and engages the link member. When the bottom member oscillates as a results of the actuation of the electromagnet in the drive unit, the lever arm pivots about the fulcrum and drives the link member to rotate in an arc shaped pattern. The rotation of the link member consequently rotates the brush head.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: December 25, 2012
    Assignee: Ranir, LLC
    Inventors: Scott P. Crossman, Dai Xiaoguo
  • Patent number: 8334626
    Abstract: A cooling unit for a power tool comprises a fan wheel (10) to be supported on an armature shaft (3) of a motor (1) of the power tool. The cooling unit comprises a torque transfer means as well as an actuating means (20, 22) for actuating this torque transfer means so as to selectively transfer the rotation of the armature shaft (3) to the fan wheel (10) during operation of the power tool.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: December 18, 2012
    Assignee: AEG Electric Tools GmbH
    Inventors: Michael Lange, Rainer Vogler
  • Patent number: 8324765
    Abstract: A fluid-operated medical or dental handle with a device for limiting the rotational speed to a maximum rotational speed value is disclosed. The handle comprises a rotating part that can be induced to rotation by a driving fluid for driving a tool connectable to the rotating part, an electrodynamic transducer driven by the rotating part for induction of an electric voltage, wherein the electrodynamic transducer has at least one coil and a magnetic element and at least one switch element for optional opening and closing of a circuit between the two ends of the at least one coil, so that with the circuit closed, an electric current and an induced magnetic field that decelerates the rotational speed of the rotating part and the tool connectable thereto can be induced in the coil of the electrodynamic transducer.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: December 4, 2012
    Assignee: W&H Dentalwerk B├╝rmoos GmbH
    Inventors: Michael Rothenwaender, Christoph Kment, Juergen Koelndorfer, Wilhelm Brugger
  • Patent number: 8310114
    Abstract: A power generating device includes a carrier module, a stator module, a rotor module and a power generating module. The stator module is assembled to the carrier module, and has a first circuit board and a plurality of driving coils. The rotor module is located in an electromagnetic field, and has a multipolar magnetic rotor and a rotating axle. A magnetic field of the multipolar magnetic rotor interacts with the electromagnetic field to make the rotor module rotating relative to the stator module, and make the multipolar magnetic rotor producing a varying magnetic field. The power generating module is located in the varying magnetic field, and has a second circuit board and a plurality of induction coils. The induction coils induct the varying magnetic field to output an induction circuit to the second circuit board.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: November 13, 2012
    Assignee: Silicon Touch Technology Inc.
    Inventors: Chi-Lone Chang, Chi-Yuan Chin
  • Patent number: 8205684
    Abstract: A pistol and/or clam shell style power tool housing. With respect to the pistol style housing, the tool housing includes a body defining a head portion with a handle portion depending therefrom to define a forward and/or a rear junction. A metal reinforcing member is configured to span along an inside surface of the body from the head portion to the handle portion such that the reinforcing member bridges either the forward or rear junction. In at least one embodiment, the reinforcing member is provided along each lateral side of the tool body. With respect to the clam shell style housing, with two opposed body halves interconnected to define the tool housing body, at least one continuous reinforcing ring is positioned about both halves of the tool housing body to prevent splitting between the two halves.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: June 26, 2012
    Assignee: Ingersoll-Rand Company
    Inventors: Christopher Anthony Kokinelis, Warren Andrew Seith
  • Patent number: 8113922
    Abstract: The invention relates to a machine tool, particularly a hand machine tool, which comprises a driving motor and an air guide element, which is disposed in the housing of the machine tool and conducts an air current passing over the driving motor to the outside. The air guide element comprises a functional section, which forms a part of the outer lateral surface of the machine tool.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: February 14, 2012
    Assignee: Robert Bosch GmbH
    Inventor: Florian Esenwein
  • Patent number: 8087475
    Abstract: An electric power tool has a housing having an inlet opening and an outlet opening, a drive motor contained in the housing, an electronic unit for controlling and regulating the drive unit, a fan a main air conduit extending between the inlet opening and the outlet opening of the housing, the drive motor being situated in the main air conduit supplyable with cooling air, and a heat sink operative for indirectly cooling the electronic unit.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: January 3, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Winfried Habel, Frank Fuchs, Andreas Schlegel, Holger Frank
  • Patent number: 8084900
    Abstract: A stater of an electrical machine has a cross section, a longitudinal extension, a jacket surface, a plurality of winding holders configured so that at least one of the winding holders for receiving a field winding has a larger winding width than another of the winding holders.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: December 27, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Ludwig Schoen, Florian Esenwein
  • Patent number: 8039999
    Abstract: A heat dissipation structure for sealed machine tools includes a motor rotor rotating to drive airflow to perform heat dissipation simultaneously. It includes a machine tool housing with a heat dissipation vent and a chamber inside, a stator in the chamber and a rotor located between the stator and the housing. The rotor and the housing wall form a swirling flow space between them. The rotor and the stator form an axial flow space between them. The swirling flow space and the axial flow space communicate through a radial airflow passage. The rotor has at least one flow directing portion. The rotor rotates relative to the stator. The stator generates thermal airflow which flows from the axial flow space through a radial airflow passage to the swirling flow space. The flow directing portion performs an exchange of cooling air and thermal airflow through the heat dissipation vent.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: October 18, 2011
    Inventor: Bach Pangho Chen
  • Patent number: 7777372
    Abstract: An electric motor designed for electric tools. The motor includes a first molded coil having a first coil covered entirely with a resin that is electrically insulating and highly heat conductive. The motor also includes a second molded coil having a second coil covered entirely with the resin. The first molded coil has a pair of first axial portions, and the second molded coil has a pair of second axial portions in alignment with the first axial portions. A stator core disposed around the molded coils includes a first stator core and a second stator core with first stator core legs and second stator core legs, respectively. Air paths through which fan airflow passes are formed between the axial portions and the opposing stator core legs.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: August 17, 2010
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hideyuki Tanimoto, Shinichi Sakamoto
  • Patent number: 7600577
    Abstract: A device for sensing a direction of rotation of a hand tool having an electric motor, has a rotatably supported brush plate provided in the electric motor and located in different positions depending on a direction of rotation of the electric motor; and at least one sensor which senses the different positions of said brush plate to determine a direction of rotation, wherein said sensor is configured as a contactless sensor.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: October 13, 2009
    Assignee: Robert Bosch GmbH
    Inventors: Robert Simm, Markus Weber, Bernhard Roth
  • Patent number: 7443058
    Abstract: A reciprocal linear driving unit and a rolling driving unit are adjacently provided on a common single shaft in axial direction thereof, so that the reciprocal linear driving in the axial direction and the rolling driving around the axis are performed by the single shaft, simultaneously. Permanent magnets constituting the reciprocal linear driving unit and the rolling driving unit are respectively provided on moving object side instead of stator, in other words, they are provided around the axis of the shaft, thereby respective permanent magnets can be miniaturized and light-weighted. Following to this, miniaturization, light-weighting and cost reduction of an actuator and a power toothbrush using the same can be realized.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: October 28, 2008
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Hiroaki Shimizu, Ryo Motohashi, Hidekazu Yabuuchi, Takahiro Nishinaka, Katsuhiro Hirata, Yuya Hasegawa
  • Patent number: 7395875
    Abstract: The invention is based on a rechargeable battery-operated hand machine tool (10) having an electric drive motor (18) accommodated in a housing (12) and powered by a rechargeable battery (20), which motor is used to drive a tool (16), and having an actuating means (14) for switching the drive motor (18) on and off. A mechanism (22) is provided, which is capable of reducing the discharging of the battery (20) during operation.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: July 8, 2008
    Assignee: Robert Bosch GmbH
    Inventors: Harald Krondorfer, Volker Bosch
  • Publication number: 20080054743
    Abstract: Embodiments are disclosed of an anti-disengagement assembly for minimizing disengagement of an electrical extension cord from a power tool of the type that includes a housing and a motor therein, the assembly including an electrical plug module configured to engage a receptacle of the extension cord, with the plug module being operatively connected to the power tool motor and being mounted in the housing and being biased by at least one spring in a configuration permitting limited movement that reduces the influence of vibration produced by the power tool on the plug module.
    Type: Application
    Filed: August 30, 2007
    Publication date: March 6, 2008
    Inventor: Robert Doumani
  • Patent number: 7323796
    Abstract: In a motor-driven tool, a carbon brush part 8 is arranged between a suction port 6 and a commutator 11 of the motor and includes a cylindrical side wall 8a. The cylindrical side wall 8a located on an outer periphery of the commutator 11 is provided with a tapered portion 8b which grows wider toward the commutator 11 and grows narrower toward a coil end 10 of the armature. Between the carbon brush part 8 and the coil end 10, there is provided a heat radiating plate 4 made of metal and adapted to be engaged with the carbon brush part 8.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: January 29, 2008
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Katsuhiro Oomori, Chikai Yoshimizu, Masanori Watanabe, Toshiyuki Nemoto, Shinki Ohtsu, Takuma Saito
  • Patent number: 7323797
    Abstract: It is an object of the invention to provide an effective technique for making compact power tool having an electric motor. A representative power tool may include a tool bit, housing and an electric motor. The electric motor is housed in the housing and drives the tool bit. The electric motor includes an output shaft, a commutator, an armature, brushes, brush holders, a brush holder base, a cooling fan and a cooling-fan facing surface. The cooling-fan facing surface is formed on the brush holder base. The cooling-fan facing surface faces the cooling fan and extends flat in the centrifugal direction to guide the discharged cooling air from the cooling fan in the centrifugal direction. Because the brush holder base not only secures the brush holder but also smoothly guides the cooling air by means of the cooling-fan facing surface, the size of the electric motor in the axial direction of the output shaft can be reduced.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: January 29, 2008
    Assignee: Makita Corporation
    Inventors: Nobuyasu Furui, Shuji Yoshikawa
  • Patent number: 7217069
    Abstract: A hand-held power tool is provided with a housing, an attachment member, and an object sensor that is removable from the attachment member. The attachment member may be removable from the tool. The object sensor, which can be used to detect studs hidden behind walls, electrical lines, and other materials, is readily accessible to tradesmen.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: May 15, 2007
    Assignee: Eastway Fair Company Limited
    Inventors: Jeffrey M. Dils, Kenneth M. Brazell
  • Patent number: 7186117
    Abstract: A battery-powered tool includes a barrel and a handle connected to the barrel. A battery pack has a body and a pivotal tube extending from a top of the battery pack. The pivotal tube is inserted in a space defined axially in the handle so as to provide electric power to the tool. The pivotal tube can be pivoted between a first position and a second position relative to the handle. A limitation portion is located between the pivotal tube and an inner periphery of the space so as to limit a movement of the pivotal tube in the handle along an axial direction. An angle restriction portion is located between the pivotal tube and an inner periphery of the space so as to restrict the body to be rotated an angle less than 360 degrees between the first and second positions.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: March 6, 2007
    Assignee: Tranmax Machinery Co., Ltd.
    Inventor: Hsin-Chi Chen
  • Patent number: 7166939
    Abstract: An electric hand tool having a machine housing, with an electric motor accommodated in the machine housing for driving a tool, and a fan wheel accommodated in the machine housing for generating a main cooling air current that flows from a main air inlet to a main air outlet through the machine housing, which said fan wheel creates a suction space and a pressure space on opposite sides when it rotates, wherein means for generating an additional air current are provided and configured such that the additional air current flows onto at least one machine component that is located outside of or in a low-flow region of the main cooling air current, wherein the electric motor includes a motor winding with winding heads that project outward on at least one end face of the electric motor, the fan wheel is located with axial clearance in front of the end face of the electric motor and is configured such that the suction space is located in front of the end face of the electric motor where the winding heads are located,
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: January 23, 2007
    Assignee: Robert Bosch GmbH
    Inventors: Mike Voigt, Erhard Hoffmann, Frank Fuchs, Martin Schulz
  • Patent number: 7122921
    Abstract: A first aspect of the disclosure concerns a driving assembly for a power toothbrush which includes a drive member, specifically an E-core electromagnet, a driven member which is responsive to the action of the drive member and a workpiece mounted on the distal end of the driven member. The drive assembly includes an interface registration member, to one end surface portion of which is secured the end face of E-core electromagnet, another portion of which is configured to produce a selected registration of the driven member and the driving assembly, and still another portion of which is configured to produce a selected registration of the interface member relative to the handle of the toothbrush. A second aspect of the disclosure concerns a split bobbin assembly for an electrical coil portion of an electromagnet in a power toothbrush.
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: October 17, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Scott E. Hall, Craig D. Hanela, Richard K. Taylor
  • Patent number: 7095142
    Abstract: A rotor for a pneumatic tool having electricity-generating capabilities includes a shaft and an integral rotor body. The rotor body includes recesses dimensioned to receive an insulated subassembly having a magnet received within a nonmagnetic insulator to allow flux to be concentrated against stator windings. The rotor can be used in a conventional pneumatic tool, but can also be fitted with the insulated subassemblies in order to cooperate with a stator in the tool to generate electricity upon rotation of the rotor when pressurized fluid is applied to the vanes. A ring stator is connected to a supporting circuit by a connector and is supportable by a nonmagnetic end plate of the pneumatic tool and is disposed between the rotor and the rotor bearing.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: August 22, 2006
    Assignee: H&S Autoshot Manufacturing
    Inventor: Jon J. Leininger
  • Patent number: 7090372
    Abstract: A generator-driven lighting device for a hand-held power tool has a lighting device, mounted on said main body of said power tool; an electric generator assembly, mounted on said power tool, supplying said lighting device with power; and a transmission device, connecting a generator axis of said generator and a main axis of said power tool, which thereby drives a rotational movement of said generator, causing said generator to generate electric power; wherein by said power tool mechanically driving said generator, said lighting device provides lighting for a user operating said power tool.
    Type: Grant
    Filed: July 27, 2004
    Date of Patent: August 15, 2006
    Assignee: Industrial Technology Research Institute
    Inventors: Jung-Huang Liao, Yuh-Ren Lee
  • Patent number: 7080696
    Abstract: A hand held electrical tool includes a gear casing for housing a drive mechanism, which gear casing comprises an entrance. The tool's motor includes an armature shaft having an end at which a pinion is formed for engaging the drive mechanism. A motor plate having a central opening fixes the gear casing with respect to the motor and is mounted around the armature shaft adjacent said pinion end and a shaft bearing is located between the motor plate and the pinion. The pinion and bearing are received in the entrance to the gear casing. A moulded on resilient sealing ring is located around the central opinion through the motor plate for sealing between the motor plate and the armature shaft and a moulded on resilient O-ring is located on the face of the motor plate facing the bearing for engaging the outer race of said bearing.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: July 25, 2006
    Assignee: Black & Decker Inc.
    Inventors: Martin Soika, Rainer Herting
  • Patent number: 7067945
    Abstract: The apparatus for converting side-to-side to rotational motion for a workpiece includes a spring assembly with a movable base mounting element which is driven in a slightly arcuate reciprocal side-to-side motion and a fixed mounting element spaced apart from the base element and mounted in the appliance so that it does not rotate or move in operation of the apparatus. A spring member, such as two planar leaf springs positioned at an angle to each other, is mounted between the movable base element and the fixed mounting element. A drive shaft member extends from the movable base element through the fixed mounting element and beyond. A workpiece such as a brushhead is mounted on the distal end of the drive shaft. The spring member is configured so that it is substantially less resistant to twisting action than bending action, such that the side-to-side motion of the base element results in rotation of the workpiece.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: June 27, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Joseph W. Grez, Jeffrey R. Gueble, Jerry C. Wood, Devin M. Nelson, Kevin A. Miller, Craig D. Hanela, Bruce E. Taber, Richard K. Taylor, William Bryant, Scott E. Hall, Andreas Loibnegger, Piet C. J. van Rens, Kurt Sadek, Paulus L. W. M. Barten, D. I. Stephan Leitner
  • Patent number: 7015602
    Abstract: A small electric appliance with a drive mechanism for generating an oscillatory motion of at least one working unit of the small electric appliance. The drive mechanism has a first drive component, a second drive component and a coil for producing a magnetic field that extends from the first drive component and acts on the second drive component that is movably arranged in the small electric appliance, in such a way that the second drive component is set in an oscillatory motion. The first drive component is movably arranged in the small electric appliance in order to execute an oscillatory motion in phase opposition to the second drive component. The mass centers of gravity of the first drive component and the second drive component, including parts co-moving with the first drive component or the second drive component, move on a common straight line.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: March 21, 2006
    Assignee: Braun GmbH
    Inventors: Bernhard Kraus, Alexander Klos
  • Patent number: 6979155
    Abstract: A hand-held power tool having a housing and an open top tray attached thereto is disclosed. The open top tray is oriented generally perpendicular to a handle axis for carrying small magnetic objects therein. Additionally, the tray is provided with a magnetic portion for retaining the small magnetic objects when the handle is inclined from a vertical position. Thus, the present invention allows small magnetic objects such as tool bits, drill bits, and fasteners to be carried on the hand-held power tool for quick and easy access by an operator.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: December 27, 2005
    Assignee: One World Technologies Limited
    Inventors: Jeffrey M. Dils, John B. Womble, Daniel Alex Chunn
  • Patent number: 6927512
    Abstract: An electrical connector assembly for a power tool, a power tool and methods for assembling a power tool. A one-piece trace or spider terminal member assembly provides points of connection for the motor components, such as the field windings, the brushes and the switch. To assemble the motor, the terminal member assembly is positioned in the motor housing. To mount the terminal member assembly, the terminal member assembly is preferably co-molded with the housing or, alternatively, may snap-fit into connectors formed on the housing. The terminal member assembly and the housing are then preferably punched or stamped at points to provide the necessary number of electrically separated contact elements to connect the components of the motor. For example, the female ends or terminals of the field windings, the brushes and the switch are connected to the electrically separated contact elements to provide a suitable complete electrical circuit for the motor.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: August 9, 2005
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Jeffrey M. Zeiler, Jeffrey C. Hessenberger
  • Patent number: 6909207
    Abstract: In an inexpensive electric tool, a thin insulating layer is provided by pouring an insulating resin material by the injection molding to extend from a rotor supporting portion 1a formed in an outer casing to an inner surface or inner and outer surfaces of the outer casing. Also, as another configuration and method, an insulating piece 12a for covering the inner surface of the rotor supporting portion is provided, and also an insulating block for covering the rotor supporting portion and supporting ribs is provided.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: June 21, 2005
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Tomoya Ikeda, Nobuhito Hosokawa, Yoshikazu Yokoyama
  • Patent number: 6902012
    Abstract: An electrical hand held tool for producing at least a percussion movement of a working tool includes an electrical drive, a first, oscillating subassembly including a percussion mechanism (2) and a rotor (5) of the electrical drive for transmitting torque to the percussion mechanism and rotatable about a rotor axis (B) extending parallel to an oscillation path (I) of the first subassembly, and a second subassembly including a housing (6) in which the first subassembly is supported for a limited oscillating movement along a tool axis (A).
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: June 7, 2005
    Assignee: Hilti Aktiengesellschaft
    Inventors: Ferdinand Kristen, Hans-Werner Bongers-Ambrosius
  • Patent number: 6900560
    Abstract: The holdable multi-functional rotary device comprises a casing suitable to be held by users. The interior thereof is formed with a receiving space for arranging a driving unit and a battery. The driving unit has a motor and a driving shaft extending out of the casing. The power of the motor and driving shaft is transferred by speed change gear set. By changing speed change gear set, the rotary speed of the driving shaft is changeable. A plurality of rotary pieces are arranged around the driving shaft. The rotary pieces are capable to achieving predetermined effects with the rotation of the driving shaft. Thereby, the whole rotary device can be combined with rotary pieces and the rotary speed of the rotary pieces are adjustable. The rotary pieces can be attached to a fan, a massage device, a dust absorbing mask, a shoe brush, a golf rod brush, etc.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: May 31, 2005
    Inventor: Hua-Sern Ji
  • Patent number: 6827157
    Abstract: A hand power tool has a housing provided with air inlet and/or air outlet openings, the openings are arranged in various regions of the housing and have different directions, and a cover is movably supported on the housing so as to close a part of the openings.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: December 7, 2004
    Assignee: Robert Bosch GmbH
    Inventor: Rudolf Fuchs
  • Patent number: 6729413
    Abstract: A power tool has a mechanism for ejecting a battery pack which includes a receiving frame which defines a cavity to receive a battery pack. A receiving member is adjacent the cavity. The receiving member meshes with a member on the battery pack to hold the battery pack in the cavity. A biasing member is in the cavity adjacent the receiving member. The biasing member ejects the battery pack from the ejecting mechanism. A member retains the biasing member in the cavity. The member guides a portion of the battery pack meshing with the receiving member into contact with the biasing member such that when the battery pack is locked onto the frame, the biasing member is in a compressed condition and when the battery pack is an unlocked position, the biasing member ejects the battery pack from the frame.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: May 4, 2004
    Assignee: Black & Decker Inc.
    Inventors: Terry L. Turner, David C. Campbell
  • Patent number: 6713905
    Abstract: A rotary power tool having a light source includes a housing, an electric motor provided in the housing and an elongated spindle engaged with and adapted to be rotatably driven by the motor. A rotatable holding assembly is attached to an end of the spindle and extends from a front end of the housing for holding a tool accessory. At least one magnet is adapted to be rotated by the spindle for producing a magnetic field, and a generally tubular sleeve is attached to the front end of the housing. At least one light emitting diode projects from a front end of the sleeve, generally between the inner and the outer surfaces of the sleeve. An inductive coil is also imbedded at least partially in the sleeve generally between the inner and the outer surfaces, proximate the magnet for generating an electric current from the magnetic field. Electrical conductors are also embedded and routed through the sleeve for supplying the electric current from the inductive coil to the light emitting diode.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: March 30, 2004
    Assignee: S-B Power Tool Company
    Inventors: Wolfgang Hirschburger, Allen M. Oles