Motor Or Gear Driven Patents (Class 81/464)
  • Patent number: 9227308
    Abstract: A pneumatic ratchet wrench is connected with an air supply device and contains: a housing, a ratchet head unit, an impact clutch unit, and a driving unit. The housing extending along a first axis line and includes an opening defined on a front end thereof and an intake formed on a distal end thereof so as to couple with an air supply device. The ratchet head unit is received in the housing and includes a drive square extending along a second axis line and extending out of the opening The impact clutch unit is received in the housing and is coupled with the ratchet head unit. The driving unit is disposed in the housing and includes a multi-chamber cylinder, a rotor member inserted into the multi-chamber cylinder and connecting with the impact clutch unit. The multi-chamber cylinder has a body, a first chamber, and a second chamber communicating with the first chamber.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: January 5, 2016
    Inventor: Yun-Ting Wang
  • Patent number: 9067309
    Abstract: A two-piece planet carrier for use in a power hand tool, the carrier comprising a drive portion mountable to a rotor of the tool and a pinned portion having a crank pin. The crank pin operatively connectable to a drive shaft of the tool to provide rotation and torque to the drive shaft. The pinned portion rotatably engaged with the drive portion such that rotation of the rotor will cause the drive portion and the pinned portion to rotate relative to each other as a function of a load applied to the drive shaft such that an offset between a crank pin center axis and a drive portion axis of rotation is variable as a function of the load, wherein the variance of the offset will vary a rotational speed and an amount of torque delivered to the drive shaft as a function of the load.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: June 30, 2015
    Assignee: Stanley Black & Decker, Inc.
    Inventor: Mark McMenemy
  • Publication number: 20150083448
    Abstract: An electric tool and a method for fastening a threaded member by using it, the electric tool has a torque output system and a control system configured to, according to a fastening level selected by a user, invoke a corresponding data to drive the motor to enable it to output with designated single-time impact quantity and impact times.
    Type: Application
    Filed: September 19, 2014
    Publication date: March 26, 2015
    Inventors: Liang Chen, Wu Chen
  • Publication number: 20140367130
    Abstract: In at least one illustrative embodiment, a rotary impact tool comprises a motor including a rotor and an input shaft coupled to the rotor for rotation therewith about an input axis, an anvil configured to be rotated about an output axis and including an output shaft, a carrier driven by the input shaft and having a passage extending through a distal end thereof, and a hammer supported and driven by the carrier and configured to impact the anvil to cause the anvil to rotate about the output axis. The anvil may comprise a blade coupled to the output shaft and configured to direct a lubricating fluid through the passage when the anvil or carrier rotates about the output axis.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 18, 2014
    Inventor: Thomas S. Dougherty
  • Publication number: 20140365012
    Abstract: An impact type fastening tool, has a housing, a motor received in the housing, a main switch for controlling ON and OFF operations of the motor, an impact mechanism connected to the motor, and a control device. The control device comprises a current detecting module and a main control module connected to the current detecting module. The main control module can judge whether the impact mechanism performs an impact according to the signal detected by the current detecting module and control the motor to automatically stop in a preset time period after the impact mechanism performs an impact.
    Type: Application
    Filed: June 5, 2014
    Publication date: December 11, 2014
    Inventors: Wu Chen, Liang Chen
  • Patent number: 8890449
    Abstract: A lock state occurrence determination apparatus includes a counter, a reset device, a reference time changing device, a lock state determination device, and an invalidation device. The invalidation device performs, in a case where a false determination of occurrence of a lock state of a motor is caused by the lock state determination device due to an operation input to operate a rotation speed of the motor, at least one of a first invalidation operation to invalidate the lock state determination device and a second invalidation operation to invalidate continuation of a counting operation by the counter.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: November 18, 2014
    Assignee: Makita Corporation
    Inventors: Jiro Suzuki, Takuya Kusakawa
  • Publication number: 20140326112
    Abstract: A pneumatic ratchet wrench includes a transmission mechanism (200) having a transmission shaft (210) with a driving end (211) and a transmitting end (212) extended from the driving end (211), a clutch seat (240) and two hammer rings (250), a pneumatic motor (300) and a ratchet joint (400). Two opposite anvils (220) are formed on the driving end (211), and an eccentric shaft (230) is axially protruded from the transmitting end (212). The clutch seat (240) is rotably sheathed on the driving end (211) and has two parallel limit pins 241, and the hammer rings (250) are installed to the limit pins (241) and corresponsive to the anvils (220) respectively. The pneumatic motor (300) is coupled to the clutch seat (240) for driving and rotating the clutch seat (240). The ratchet joint (400) is coupled to the eccentric shaft (230) and driven by the transmission shaft (210).
    Type: Application
    Filed: March 26, 2014
    Publication date: November 6, 2014
    Applicant: Basso Industry Corp.
    Inventors: Cheng-Wei LAI, San-Yih SU
  • Publication number: 20140260834
    Abstract: A power driven tool for rotating a mechanical element includes a housing including a base and a head connected to the base. The head has a yoke formed by opposing arms separated by an opening. A selectively operable motor is positioned in the housing having an output shaft that rotates relative to the housing during operation of the motor. A ratchet mechanism is mounted in the housing and includes an output drive at least partially mounted in the opening for rotation relative to the housing to rotate the mechanical element in a selected direction. A cap is positioned on the head of the housing across the opening forming the yoke. The cap reinforces the yoke during operation of the tool to prevent the arms from separating and blocking at least part of the opening between the arms to prevent debris from entering the ratchet mechanism.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: SP AIR KABUSHIKI KAISHA
    Inventor: Shigeki Kobayashi
  • Publication number: 20140260835
    Abstract: A through-hole type power ratchet wrench includes a socket bracket, a swingable member, a ratchet socket, first and second pawls, and first and second resilient elements. The swingable member is disposed in the socket bracket and adjacent to an outer surface of the ratchet socket. The pawls are swingably fixed on the swingable member. The pawls, biased by the respective resilient elements, tend to engage with the outer surface of the ratchet socket. The wrench also includes a limiting member configured to isolate one of the first and second pawls from the ratchet socket. The limiting member is formed with an opening adapted for allowing one of the pawls to pass therethrough, and the limiting member is moveable about the ratchet socket between first and second positions. The opening of the limiting member faces towards the first pawl and second pawls when at the first and second positions, respectively.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 18, 2014
    Applicant: CHERVON (HK) LIMITED
    Inventors: Liang Chen, Changxi Dai, Junliu Zhang
  • Patent number: 8793855
    Abstract: A method of feeding a stud to a joining head including a stud shank clamp and operable to join the stud to a workpiece, and wherein the method of feeding the stud comprises the steps of providing a stud holding device including a securing sleeve and a plurality of collet arms; feeding the stud into the stud holding device to a first position wherein the flange is arranged above the free end of the plurality of arms and below the securing sleeve; and securing the stud in the first position by engaging the securing sleeve behind the flange.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: August 5, 2014
    Assignee: Newfrey LLC
    Inventors: Jochen Hain, Alexander Schug, Karl Briel, Markus Feierabend, Michael Schneider, Frank Rosemann, Wolfgang Werner, Harald Knetsch
  • Publication number: 20140157961
    Abstract: An impact ratchet wrench includes a motor assembly, a transmission assembly, an impact assembly and a ratchet assembly which are arranged in a housing and connected with each other in turn. The motor assembly drives the transmission assembly and the transmission assembly includes a cylindrical gear train for providing an output at a first rotating speed or a second rotating speed lower than the first rotating speed. The impact assembly includes a striking member that is driven by the transmission assembly and an output member. The striking member of the impact assembly provides an increasing torque to the output member intermittently to drive the ratchet assembly.
    Type: Application
    Filed: July 1, 2013
    Publication date: June 12, 2014
    Applicant: Chervon (HK) Limited
    Inventor: Liang Chen
  • Patent number: 8533922
    Abstract: A holding device for holding a stud, which includes a radially projecting flange in a securing position, comprises a collet component including a hollow tubular insertion section defining an insertion axis, and a clamping section operable to exert a radially inwardly directed clamping force for clamping the stud. A securing device is arranged on the insertion section and includes a securing sleeve formed of plurality of separate securing-sleeve sections that are radially movable relative to one another. A clearance space is defined between a bottom end of the securing-sleeve sections and a top end of the clamping section, and the clearance space is operable for holding a flange of a stud in the securing position.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: September 17, 2013
    Assignee: Newfrey LLC
    Inventors: Jochen Hain, Alexander Schug, Karl-Heinz Briel, Markus Feierabend, Michael Schneider, Frank Rosemann, Wolfgang Werner, Harald Knetsch
  • Patent number: 8469250
    Abstract: An auto hammer with a striking device includes a striking rod and a clamping mechanism. The striking rod continually strikes a component to gradually insert the component into a workpiece. The clamping mechanism includes at least one clamping element, a biasing device, a bush and a sleeve, and the clamping elements are movable between a closed position and an opened position. The bush is arranged around the striking rod so as to prevent the nail head from becoming trapped in a gap which is formed after the clamping elements are entirely opened. The biasing device is arranged for biasing the bush toward the direction of striking the component. This clamping mechanism can reliably clamp nails or other components to facilitate user operation of the device.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: June 25, 2013
    Assignee: Chervon Limited
    Inventor: Hongtao Zhou
  • Patent number: 8308039
    Abstract: An auto hammer having a housing, a grip portion and a striking device. The striking device includes a striking rod for striking a nail or other element using a straight reciprocating motion. The striking device has an associated clamping mechanism for clamping the nail or other element. The clamping mechanism has a driving portion, a first clamping portion, and a second clamping portion. The first and second clamping portions are moved between a closed position and an opened position. In the closed position, the element is held between the first and second clamping portions. A first slot and a second slot are arranged on the first and second clamping portions respectively. The driving portion is arranged in both the first and second slots and moves along the first and second slots.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: November 13, 2012
    Assignee: Chervon Limited
    Inventor: Gan Wei
  • Publication number: 20120024553
    Abstract: An implement for loosening stuck connection elements includes a striker hammer with a connecting portion for connection to a percussion tool at one end, and a striking surface for imparting an impulsive stress at the other end; a counteracting body opposing the striker and having an abutment surface that faces towards the striking surface; a retainer for retaining the striker to the counteracting body, while keeping a predetermined minimum distance between the striking surface and the abutment surface (8), so adapted to accommodate at least one of the elements of a pair to be loosened. A combination of the implement with a percussion tool and/or a wrench.
    Type: Application
    Filed: February 4, 2010
    Publication date: February 2, 2012
    Inventor: Pierluigi Speranza
  • Patent number: 8069929
    Abstract: An impact tool includes: a spindle disposed in a housing; an anvil disposed in front of the spindle and rotatably supported by the housing through a metal bearing, a rear surface of the anvil having a bearing hole in which a front end of the spindle is received; an impact mechanism configured to transmit a rotation of the spindle to the anvil; an outer groove formed on an outer periphery of the anvil and opposed to the metal bearing; and a connecting opening radially extending in the anvil and connecting the bearing hole and the outer groove to provide a communication therebetween. The outer groove is formed to have a depth in the range of 3-10% of an outer diameter of the anvil, and the connecting opening opens at a rear end of the outer groove in an axial direction of the anvil.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: December 6, 2011
    Assignee: Makita Corporation
    Inventors: Manabu Sugimoto, Hidenori Nagasaka, Hiroshi Otsuka
  • Patent number: 7836802
    Abstract: Disclosed is a centrifugal impact wrench using an electric driving motor, which is rotated by electricity supplied from an electric power source, as a power source.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: November 23, 2010
    Assignee: Dongeun Electronics Co., Ltd.
    Inventor: Ja Young Yoon
  • Publication number: 20100064864
    Abstract: A power driven tool for rotating a mechanical fastener including a housing with a motor positioned in the housing. The motor includes a drive shaft that rotates relative to the housing. An impact mechanism in the housing is operatively connected to the motor drive shaft. The impact mechanism has a base, an output and a cam. The output and cam are rotatably mounted on the base. A pair of hammers are pivotally mounted on the base and selectively positioned by the cam. The cam biases the hammers to intermittently impact the output. A ratchet head assembly is operatively connected to the output of the impact mechanism. The ratchet head assembly includes an output member rotatably mounted on the housing to rotate the mechanical fastener. The assembly also includes a ratchet operable to limit rotation of the output member in a selected direction.
    Type: Application
    Filed: September 15, 2009
    Publication date: March 18, 2010
    Applicant: SP AIR KABUSHIKI KAISHA
    Inventor: Shigeki Kobayashi
  • Patent number: 7377019
    Abstract: A method and apparatus for fastening a first relatively soft structural component such as a wood panel to a second relatively hard structural component such as a steel angle iron using fasteners each having a forward self-drilling portion, a rearward, self-tapping portion, and an outwardly projecting head. The fasteners are driven by a pneumatic rotary impact driver and the method comprises rotatively driving each fastener so as to cause its self-drilling portion to drill a first hole through the wood panel and thereafter rotatively driving and impacting that fastener so as to cause its self-drilling portion to drill a second hole in the angle iron and its self-tapping portion to form a screw connection with the angle iron around the second hole.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: May 27, 2008
    Inventor: Harry M. Haytayan
  • Publication number: 20070251359
    Abstract: A torque intensifying tool for tightening and loosening threaded connectors has at least one torque intensifier means having a torque intensifier housing portion, having input means and having a first output means and a second output means, a drive operatively connected with the input means for transmitting a torque from the drive through the intensifying means to a threaded connector, so that in one mode of operation the torque intensifier housing portion together with the first and the second output means turn in the same direction and the same speed and torque as the input means, and in another mode of operation the torque intensifier housing portion together with one of the first and second output means receives a turning force in one direction while the other one of the first and second output means receives an equal turning force in the opposite direction at a lower speed but higher torque than the input means, and so that one of the first and second output means turns in the one mode and in the another
    Type: Application
    Filed: May 7, 2007
    Publication date: November 1, 2007
    Inventors: John K. Junkers, Peter Koppenhoefer, Calin Voicu, Neil Smith, Edward Kim
  • Patent number: 7194939
    Abstract: A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a support seat, a cam, a cover, and a hammer. Thus, the pivot shaft of the hammer has two opposite sides each formed with a reinforcing rib to reinforce the structural strength of the hammer. In addition, each of the first pivot shaft and the second pivot shaft has a guide groove to overcome the shear stress applied on the hammer during the rotation striking process of the hammer, thereby preventing the hammer from being distorted or broken due to concentration of a stress so as to enhance the lifetime of the hammer.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: March 27, 2007
    Inventor: Hsin Ho Chang
  • Patent number: 7140282
    Abstract: A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a cylindrical support seat, a cam, a cover, and a hammer. The hammer has a protruding engaging portion and a reinforcing rib juxtaposed to the engaging portion to reinforce the structural strength of the hammer. Thus, the two opposite sides of the hammer are connected by the reinforcing rib to reinforce the structural strength of the hammer, thereby preventing the hammer from being distorted or broken due to concentration of a stress so as to enhance the lifetime of the hammer.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: November 28, 2006
    Inventor: Hsin Ho Chang
  • Patent number: 7089833
    Abstract: The invention relates to a device utilizing compressed air for loosening and tightening fasteners that are located in hard to access areas. The device enables a single operator to stabilize the device while applying pressure via a pneumatic hammer to loosen or tighten fasteners. The device uses socket principles that enable the user to switch the sockets and provide a wide variety of options to accommodate the shapes and sizes of the fasteners.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: August 15, 2006
    Assignee: H.B. Products, Inc.
    Inventors: James E. Hamann, George R. Hamann
  • Patent number: 6935207
    Abstract: An automatic jar lid opener comprises a cylindrical housing and a truncated conical lid retainer rotatably attached to the cylindrical housing. A rotary hammer assembly is installed in the housing to convert a torque output from a motor assembly in the housing, into a twisting impact force applied through the lid retainer to a threaded jar lid in order to break a seal or initial resistance securing the lid screwed on a jar.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: August 30, 2005
    Inventor: Franco Mazza
  • Patent number: 6681663
    Abstract: A hand tool includes a function end such as an box end at one end of the handle and a vibration device is connected to the other end of the handle. The vibration device includes a tubular hollow body for receiving a power supply unit, a driving unit and a control switch therein. An eccentric member extends from an end of the driving unit such that when the driving unit is activated, the rotation of the eccentric member shakes the whole handle of the tool. A contact head is connected to an end of the body and protrudes from an outer periphery of the handle so that the rusted nut can be shaken by the contact head to loose the rust on the nut.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: January 27, 2004
    Inventor: Chih-Ching Hsien
  • Patent number: 6526852
    Abstract: A screw driving tool including a housing (1), a hollow spindle (3) rotatably supported in the housing (1) with a possibility of a limited axial displacement relative thereto, a screw-in spindle 5 at least partially extending in the hollow cylinder (3), connected thereto for joint rotation therewith, and supported for a limited axial displacement relative thereto, an impact mass (15) for displacing the screw-in-spindle (5) in a screw-in direction, a drive motor (2) for rotating the screw-in spindle (5), and a clutch (6) located between the hollow spindle (3) and the drive motor output shaft (19) for transmitting rotational movement to the hollow spindle (3).
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: March 4, 2003
    Assignee: Hilti Aktiengesellschaft
    Inventors: Horst Rahmsdorf, Thomas Hofbrucker, Markus Looser, Thomas Bader
  • Patent number: 5425293
    Abstract: A driver bit holding sleeve 6 is disposed in a shooting portion 4 so as to enable it to be rotated together with a driver bit 5 struck by a striking piston 2 while permitting the driver bit 5 to be slidably displaced in the shooting portion 4, and a piston-cylinder mechanism 10 for rotationally driving the holding sleeve 6 is arranged in the vicinity of the shooting portion 4. The piston-cylinder mechanism 10 is operatively associated with the holding sleeve 6 via a converting mechanism 17 for converting reciprocable linear movement of the piston-cylinder mechanism 10 into rotary movement of the holding sleeve 6. Since a striking sleeve 7 is threadably squeezed in a material to be handled after it is struck by a driver bit 5, any type of striking screw 7 having a circular head portion can easily and reliably be struck in the material.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: June 20, 1995
    Assignee: Max Co., Ltd.
    Inventors: Takashi Nakazato, Takumi Harigaya
  • Patent number: 5213017
    Abstract: A battery powers the motor of an electrically powered impact gun. The body of the gun vibrates at some frequency and an aluminum brush holder therein is configured to vibrate at about the same frequency to minimize chatter and arcing of the brushes on the commutator bars.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: May 25, 1993
    Assignee: Aircraft Dynamics Corporation
    Inventors: Jack D. Jones, James D. Knebel
  • Patent number: 5158354
    Abstract: Device for screwing and unscrewing screws, bolts and nuts comprising an electric motor (2), a flywheel (14) fixed on an auxiliary shaft (5) connected to the output shaft of the electric motor by means of a pair of pinions (3, 4) made of elastic plastic material like polyurethane and a wrench (9) connectable to said flywheel by way of projecting teeth (15, 16) and moving axially in relation to said flywheel by way of an elastic member (11).
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: October 27, 1992
    Assignee: Spiranyl S.a.r.l.
    Inventor: Jacques Simonin
  • Patent number: 5138915
    Abstract: A wrench has a handle with a jaw for gripping a workpiece. The jaw is formed of a first jaw member which moves transversely with respect to the handle and a second jaw member which is connected to the handle by an adjustment nut and extension to move relative to the first jaw member. An air motor delivers impact forces to a hammer which in turn transfers the impact forces to the first jaw member. The air motor is controlled by a valve secured to the handle. The surfaces of the jaw members may be exchanged to interface with specific workpieces.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: August 18, 1992
    Inventor: Don Doll
  • Patent number: 5070750
    Abstract: To prevent the head of small sized bolts from being twisted off by a rotary electrically powered impact tool, a structure is provided between the outlet drive of the impact tool and the head of the bolt to minimize the torque transmitted between the impact tool and the bolt head.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: December 10, 1991
    Assignee: Aircraft Dynamics Corporation
    Inventors: Jack D. Jones, James D. Knebel
  • Patent number: 4991472
    Abstract: An impact tool comprised of a light weight housing having a forward anvil and hammer compartment, a hollow handle, and a rear cradle to receive a 12 volt motor, its housing and wiring therefor, with the motor removably accessible by the removal of only two threaded bolts. A trigger operated on-off switch is mounted in the handle.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: February 12, 1991
    Assignee: James Curtis Hilliard
    Inventor: Lyndol W. Hollingsworth
  • Patent number: 4919022
    Abstract: The powered ratchet wrench 10 is constructed of several components. A throttle lever 20 controls the air flow to a rotary air motor 30. The rotary output of the motor is transmitted to the hammer assembly 40 of an impact clutch mechanism. A spring 50 biases an anvil shaft 60 into association with the hammer assembly 40. The anvil can be directly driven by the motor through the hammer assembly or can be driven intermittently by a series of rotational impacts from the hammer assembly. The rotation of the anvil shaft causes the reversible ratchet mechanism 70 to rotate in the desired direction, thus tightening or removing a threaded fastener. Only a small reaction force is transmitted by the tool to the operator once the fastener is tightened.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: April 24, 1990
    Assignee: Ingersoll-Rand Company
    Inventors: Akira Ono, Toshiro Iritani
  • Patent number: 4905423
    Abstract: A power tool apparatus which is hand-holdable during operation serves for facilitating especially heavy duty work, e.g. on a high scaffolding. The apparatus is composed of three building blocks, a central one haivng an elongated enveloping shell and an integral transverse wall dividing the shell into a forward and a rearward compartment. The latter contains a speed-reducing transmission unit and has a motor unit attached to the shell rear end. As a third building block the operator equipped with a kit according to the invention has the choice of several inset units, among them a simple front end wall with an intermediate shaft, and the same end wall and an impact-generating unit on the intermediate shaft, which inset units he can introduce through the open front end of the enveloping shell and exchange them as required without taking apart the transmission unit or detaching the motor unit. A handle can likewise be attached to the central shell unit.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: March 6, 1990
    Inventor: Christiaan G. M. van Laere
  • Patent number: 4821611
    Abstract: By transferring the power fed from a motor to a ratchet mechanism through means of an impact clutch mechanism, a relatively large torque is obtained by the impact clutch mechanism. In addition when a torque greater than a predetermined level is applied to the ratchet mechanism, reaction is never given to the operator's hand because the impact clutch mechanism does not transfer a force greater than the present torque to the ratchet mechanism, thus permitting safe operation. With the ratchet mechanism, moreover, it becomes possible to effect such operation as first loosening and removing by the operator's force such members as bolts and nuts which have been additionally tightened independently or strongly tightened to a level in excess of a certain torque preset for the device.
    Type: Grant
    Filed: April 15, 1987
    Date of Patent: April 18, 1989
    Assignee: Shinano Pneumatic Industries Inc.
    Inventor: Osamu Izumisawa
  • Patent number: 4619162
    Abstract: An electric rotary power tool apparatus is adapted for loosening jammed or seized automobile wheel nuts or bolts and holdable by hand during operation. It comprises(1) an electric motor laid out to be driven by an electric direct current having an operational voltage of at least 8 to 30 volts and at least 20 up to 60 amperes, and comprising a stator, a rotor, first and second pole means, and a driving shaft bearing said rotor and having a rotary axis, the speed of said motor, at a nominal voltage of 12 to 24 volts ranging from 8000 to 30000 r.p.m. under load;(2) a casing in which the motor is housed;(3) an on-off and reversing switch;(4) tool socket means being adapted for receiving a socket tool therein and comprising a driven shaft, the speed under load of which driven shaft is in the range of from 1200 to 4000 r.p.m.
    Type: Grant
    Filed: March 29, 1984
    Date of Patent: October 28, 1986
    Inventor: Christiaan G. M. Van Laere
  • Patent number: 4585078
    Abstract: Disclosed is a rotary impact tool comprising a case enclosing a drive motor, a hammer member with an inner working surface provided with projections, an intermediate member transmitting rotation from the motor to the hammer member and including a guide made eccentric relative to the axis of rotation and intended to transmit rotation from the drive motor to the hammer member as well as to provide translation of the hammer member in a plane perpendicular to the axis of rotation, a spindle disposed coaxially with the intermediate member, embraced by the inner working surface of the hammer member, and having on its outer surface projections corresponding to the projections made on the inner working surface of the hammer member to transmit impulse rotation to the spindle.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: April 29, 1986
    Inventors: Vladimir M. Alexandrov, Anatoly I. Rabinov, Mikhail I. Shalyapin, Valery I. Jutkevich
  • Patent number: 4581964
    Abstract: A fastener driving tool comprising a tool body defining a fastener drive track, a fastener driver mounted in the drive track for movement through successive drive and return strokes, a magazine providing a space for retaining a coiled strip of fasteners, a guide passage leading from the magazine to the drive track along which a leading end portion of the strip with supported fasteners can be moved, and a fastener feeding mechanism for moving the leading end portion of the strip with fasteners along the guide passage. The feeding mechanism includes a L-shaped member having a horizontally extending portion and a vertical portion extending upwardly therefrom. The L-shaped member is disposed with respect to the guide passage such that the horizontal extending portion extends through a continuous longitudinal gap in the strip and the vertically extending portion extends alongside the inner surface of the continuous wall of the strip defining the upper portion of the gap.
    Type: Grant
    Filed: February 22, 1985
    Date of Patent: April 15, 1986
    Assignee: Max Co. Ltd.
    Inventor: Mitsuhiro Takatsuru
  • Patent number: 4561331
    Abstract: A tool for use in rotating a nut threadedly received on a mediately disposed threaded portion of an elongate connector having a contoured outside end and the tool simultaneously holding the connector stationary. The nut in conjunction with the connector are adapted to facilitate the retention of the outside wheel rim of a dual rim self-aligning wheel rim to a brake drum. The tool comprises a motor for providing rotational motion when in a selected condition. A wrench assembly for engaging the nut so that nut may be rotated. A drive assembly for connecting the motor to the wrench assembly so that the wrench assembly rotates the nut when engaged thereto and when the motor is in its selected condition. An axially stationary holding assembly for engaging the contoured end of the connector so as to hold the connector stationary during rotation of the nut. The holding assembly includes a socket portion that engages the contoured end. The socket portion is completely contained within the wrench assembly.
    Type: Grant
    Filed: August 2, 1984
    Date of Patent: December 31, 1985
    Inventor: Russell W. Pratt, Sr.
  • Patent number: 4512222
    Abstract: The loosening tool includes a U-shaped body with a bore in one of the legs thereof. A shaft is slidably located in the bore and carries a hammer at one end and a reciprocating hammer engaging means at the other end. The hammer and the other leg have surfaces that generally match the surfaces of interconnected threaded members which are to be loosened.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: April 23, 1985
    Assignee: Snap-on Tools Corporation
    Inventor: Steven L. Christophersen
  • Patent number: 4507991
    Abstract: A tool for installing fastening devices includes a casing having a handle portion, a body portion and a tip portion. A rotatable socket at the tip portion engages the fastener and screws it into the materials to be joined. A barb assembly engaging rod disposed within the casing is then extended out through the tip portion of the tool and depending on the type of fastener being used provides either impact or rotational motion to a plunger disposed within the fastener.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: April 2, 1985
    Inventor: Stuart H. Lemke
  • Patent number: 4505170
    Abstract: An electric rotary power tool apparatus is adapted for loosening jammed or seized automobile wheel nuts or bolts and holdable by hand during operation. It comprises(1) an electric motor laid out to be driven by an electric direct current having an operational voltage of at least 8 to 30 volts and at least 20 up to 60 amperes, and comprising a stator, a rotor, first and second poles, and a driving shaft bearing said rotor and having a rotary axis, the speed of said motor, at a nominal voltage of 12 to 24 volts ranging from 8000 to 30000 r.p.m. under load;(2) a casing in which the motor is housed;(3) an on-off and reversing switch;(4) a tool socket being adapted for receiving a socket tool therein and comprising a driven shaft, the speed under load of which driven shaft is in the range of from 1200 to 4000 r.p.m.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: March 19, 1985
    Inventor: Christiaan G. M. Van Laere
  • Patent number: 4468826
    Abstract: A hammer-drill is adapted for drilling a hole in masonry and subsequently driving a threaded masonry fastener therein. The hammer-drill has a driving output shaft nested concentrically within a driving output sleeve. The shaft and sleeve both extend forwardly of the tool housing, and both are driven continuously by respective gearing in the tool. The sleeve, however, is driven at a substantially lower rpm than the shaft and at a higher torque. After the hole is drilled, a tubular member is releasably and drivingly coupled to the sleeve. The tubular member encloses the masonry drill bit, which is continually rotated, and the drill bit need not be removed from the tool to seat the fastener. The tubular member has a forward portion provided with a socket for the head of the masonry fastener.
    Type: Grant
    Filed: June 11, 1982
    Date of Patent: September 4, 1984
    Assignee: Black & Decker Inc.
    Inventor: Robert G. Moores, Jr.
  • Patent number: 4432257
    Abstract: A shoe bolt securing and removing apparatus which includes a carriage movable along rails, a mounting framework movably supported on said carriage for movement transversely of said rails, a power driven rotary bolt turning tool mounted on said mounting framework for upward and downward movement, means supported on said mounting framework for moving said bolt turning tool upwardly and downwardly, a nut holder support supported on said mounting framework for upward and downward movement, means supported on said mounting framework for moving said nut holder support upwardly and downwardly and a nut holder supported on said nut holder support below said bolt turning tool for movement back and forth transversely of said rails, said nut holder including a nut receiving portion having the center axis adapted to align with the center axis of said bolt turning tool in a vertical plane in the advanced position of the nut holder.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: February 21, 1984
    Assignee: Caterpillar Mitsubishi Limited
    Inventors: Kazuyoshi Yamamoto, Tadashi Sato
  • Patent number: 4416340
    Abstract: In accordance with the present invention, the drilling head includes a body or spool having a flow bore and a removable side outlet. Upon removal of the side outlet, the drilling head will pass through most rotary tables. The drilling head further includes a closure member for closing the annulus between that portion of the drilling head above the side outlet and a drive tube, such as a kelly, extending through the drilling head flow bore. The closure member includes a nonrotating support tube and a rotating seal tube adapted to form a nonrotating seal with the drive tube. The seal tube is rotatably supported by bearings within the support tube. The closure member is small enough to pass through even rotary tables that are too small to pass the drilling head.A segmented clamp secures the closure member to the drilling head body around one end of the flow bore. The clamp includes at least two segments, for fast actuation, having one end connected to a variable length linkage.
    Type: Grant
    Filed: December 24, 1981
    Date of Patent: November 22, 1983
    Assignee: Smith International, Inc.
    Inventor: Edmond I. Bailey
  • Patent number: 4400995
    Abstract: The power tool has a spindle lock member rotating with the output spindle with a blocking member normally rotating with the lock member but capable of being restrained against rotation. The blocking member extends beyond the lock member and is provided with an opening through which the lock pin can project if the blocking member is at rest or rotating slowly but the opening precludes lock pin entry at normal operation speeds. The lock member has a recess of substantial angular embrace so the ends of the recess can be impacted on the lock pin.
    Type: Grant
    Filed: September 23, 1981
    Date of Patent: August 30, 1983
    Assignee: Milwaukee Electric Tool Corporation
    Inventor: Bernhard Palm
  • Patent number: 4370906
    Abstract: A system for installing an elongate fastener which is partially threaded in a workpiece is provided. The system includes a mass which is resiliently mounted so that it is reciprocatable at a resonant frequency. The mass is excited so that it reciprocates at least near its resonant frequency. A chuck is provided with a front portion adapted to releaseably support the fastener, and a back striking surface. The chuck is located so that the reciprocating mass intermittently impacts the striking surface of the chuck to drive the fastener into the workpiece until the threaded portion of the fastener engages the workpiece. Once the threaded portion of the fastener engages the workpiece, the front portion of the chuck is rotated to correspondingly rotate the fastener to complete the installation of the fastener in the workpiece.
    Type: Grant
    Filed: May 5, 1980
    Date of Patent: February 1, 1983
    Assignee: Resonant Technology Company
    Inventor: Raymond A. Gurries
  • Patent number: 4368784
    Abstract: A power screwdriver has a drive motor and a tool holder arranged in a housing, a driving coupling including a driving coupling part driven by the motor and a driven coupling part, and a locking coupling arranged between the driving coupling and the tool holder, wherein the couplings are arranged so that when the tool holder is pressed against a screw the coupling parts of the driving coupling are connected with one another and torque from the motor is transmitted to the tool holder in a normal manner, when thereafter a limit torque is attained the locking coupling is overrun, the driving coupling part of the driving coupling is arrested, and the driven coupling part of the driving coupling is disconnected from the driving coupling part, and when the tool holder is pressed stronger against the screw which is difficult to screw in the driven coupling part displaces and follows the driving coupling part and is again connected with the latter so as to again provide for transmission of the torque from the motor to
    Type: Grant
    Filed: April 15, 1981
    Date of Patent: January 18, 1983
    Assignee: Robert Bosch GmbH
    Inventors: Steffen Wunsch, Heinz Walz
  • Patent number: RE33711
    Abstract: The powered ratchet wrench 10 is constructed of several components. A throttle lever 20 controls the air flow to a rotary air motor 30. The rotary output of the motor is transmitted to the hammer assembly 40 of an impact clutch mechanism. A spring 50 biases an anvil shaft 60 into association with the hammer assembly 40. The anvil can be directly driven by the motor through the hammer assembly or can be driven intermittently by a series of rotational impacts from the hammer assembly. The rotation of the anvil shaft causes the reversible ratchet mechanism 70 to rotate in the desired direction, thus tightening or removing a threaded fastener. Only a small reaction force is transmitted by the tool to the operator once the fastener is tightened.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: October 8, 1991
    Assignee: Ingersoll-Rand Company
    Inventors: Akira Ono, Toshiro Iritani