Rotation Is Intermittent Or Oscillatory Patents (Class 173/110)
  • Patent number: 9592596
    Abstract: In accordance with an aspect of the application, a device for the driving in of an affixing element into a substrate has an energy transfer element for the transfer of energy to the affixing element. Preferably, the energy transfer element can be moved between a starting position and a placement position, wherein the energy transfer element is located in the starting position before a driving-in process and in the placement position, after the driving-in process. In accordance with another aspect of the application, the device comprises a mechanical energy storage unit for the storage of mechanical energy. The energy transfer element is then preferably suited for the transfer of energy from the mechanical energy storage unit to the affixing element.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: March 14, 2017
    Assignee: Hilti Aktiengesellschaft
    Inventor: Ulrich Schiestl
  • Patent number: 9573262
    Abstract: A hammer drill serving as an impact tool is provided with a crank housing that accommodates a crankshaft, and a cylinder accommodated in the crank housing. Receiving portions that receive the cylinder which is pressed rearward are provided at multiple locations of the crank housing in the front-rear direction. At least one of the receiving portions is disposed to receive the rear-end portion of the cylinder. A portion of the cylinder, which is received by another one of the receiving portions is a circlip (circumferential member) made of a metal.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: February 21, 2017
    Assignee: MAKITA CORPORATION
    Inventors: Hajime Takeuchi, Masanori Furusawa, Yoshiro Tada
  • Patent number: 8397832
    Abstract: A hand tool is disclosed, comprising a housing, a motor shaft being coupled to a drive motor, a working spindle configured for being driven rotatingly oscillatingly about its longitudinal axis, and a coupling element being driven rotatingly by the motor shaft and having a closed guide surface that revolves around the motor shaft. The guide surface is coupled, via transmission means, to at least one driver for driving the latter. The at least one driver is arranged movably relative to the working spindle and engages the working spindle at a circumferential region thereof for driving the latter rotatingly oscillatingly.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: March 19, 2013
    Assignee: C. & E. Fein GmbH
    Inventors: Juergen Blickle, Olaf Klabunde, Heinrich Weber
  • Patent number: 8267191
    Abstract: In an upper surface of a crank housing is provided an inlet for grease which is configured to be openable and closable by a cap. A vibration damping mechanism, which includes a counterweight provided with a connecting pin loosely fitted in a connecting hole of an eccentric pin when the cap is attached, is mounted in the cap, whereby the vibration damping mechanism is allowed to be taken in and out of the crank housing through the inlet by attachment and detachment of the cap to and from the inlet.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: September 18, 2012
    Assignee: Makita Corporation
    Inventors: Masanori Furusawa, Yoshihiro Kasuya
  • Publication number: 20110226500
    Abstract: In an upper surface of a crank housing is provided an inlet for grease which is configured to be openable and closable by a cap. A vibration damping mechanism, which includes a counterweight provided with a connecting pin loosely fitted in a connecting hole of an eccentric pin when the cap is attached, is mounted in the cap, whereby the vibration damping mechanism is allowed to be taken in and out of the crank housing through the inlet by attachment and detachment of the cap to and from the inlet.
    Type: Application
    Filed: July 22, 2008
    Publication date: September 22, 2011
    Applicant: MAKITA CORPORATION
    Inventors: Masanori Furusawa, Yoshihiro Kasuya
  • Patent number: 8011445
    Abstract: A portable power tool has a housing, a rotating sleeve provided for rotatably driving a tool and a rotatably supported in the housing by at least one bearing, a driving gear-wheel installed on the rotating sleeve in a freely rotating manner and drivable by a motor, a safety clutch that couples the driving gear-wheel with the rotating sleeve in a rotation-proof manner, the safety clutch having two clutch members that are slippable, with one of the clutch members being assigned to the driving gear-wheel and the other clutch member being assigned to the rotating sleeve in both cases in a rotation-proof manner, and with a coupling sleeve providing a force against which the clutch members are slippable when a limit torque is exceeded, the bearing being seated on the rotating sleeve in an axially displaceable manner and loaded by the coupling sleeve of the safety clutch against an axial stop of the rotating sleeve.
    Type: Grant
    Filed: September 6, 2005
    Date of Patent: September 6, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Achim Duesselberg, Kurt Sieber
  • Patent number: 7237625
    Abstract: A driving device for installing a pipe or casing, without the use of hydraulic or pneumatic means, by capturing the rotational motion of the drill string. The driving device is placed at the top end of the pipe being (42) installed and the drill string (2) passes through the center of the device. The drill string freely rotates, advances or retracts within the driving device, until the driving device is attached (4) to the drill string when required. When the driving device is attached to the drill string, the rotational force of the drill string and any downward force applied to the drill string are captured, and used to install the pipe. The driving device uses the rotation of the drill string to impact a blow to the pipe, driving the pipe downward. The driving device uses any downward force applied to the drill string to maintain downward pressure on the pipe.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: July 3, 2007
    Inventors: Ronald G. Minshull, Brian Richard Minshull
  • Patent number: 6722448
    Abstract: A driving tool includes a block and an impactor received in a front and a rear chambers of a handle, a driving shank attached to the block, and a plunger engaged between the block and the impactor. The impactor includes a cavity formed in one end for selectively receiving the tip of the plunger and for impacting onto the plunger and the block and the driving shank when the tip of the plunger is aligned with and engaged into the cavity of the impactor. The block has a guide device for guiding the block and the driving shank to rotate relative to the handle.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: April 20, 2004
    Inventor: Big Ju
  • Patent number: 6698530
    Abstract: The invention is based on a hand power tool, in particular a hammer drill, with a drivable drive mechanism (12) accommodated in a housing (10) and a mechanical hammer unit (14), which is for percussion-driving a tool (16) in a tool holding fixture (18) and has a hammer (20) that can be driven in its hammering motion by a driver unit (22), which has at least one annular curved path (24, 26) with raised areas and recessed areas oriented axially toward the tool and has a feeler unit (28), which is operationally connected to the hammer (20) and which, by at least one feeler element (30), can be brought into operational connection with the raised areas and recessed areas of the curved path (24, 26). The invention proposes that the feeler unit (28) has at least two feeler elements (30) that can be brought into operational connection with the curved path (24, 26).
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: March 2, 2004
    Assignee: Robert Bosch GmbH
    Inventor: Joachim Hecht
  • Patent number: 6578643
    Abstract: A pneumatic ratchet drive wrench of the present invention includes a pair of single springs that each bias a corresponding pawl into engagement with an output member and inhibit counter-rotation of the output member opposite the corresponding pawl. The pawl and spring construction allows the wrench head to be smaller than conventional pneumatic ratchet drive wrenches, providing better wrench access into small spaces. The spring is inexpensively formed as one piece of spring wire having independent spring coils for biasing the pawl and inhibiting counter-rotation of the output member.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: June 17, 2003
    Assignee: S.P. Air Kabusiki Kaisha
    Inventor: Osamu Izumisawa
  • Patent number: 5868208
    Abstract: A power tool has a drive mechanism with an output shaft which performs an intermittent rotary motion. The output shaft drives, via an overrunning clutch, a tool drive shaft to drive a tool, which thus performs a quasi-continuous rotary motion that, as the load on the machine increases, transitions increasingly into a discontinuous rotary motion. The power tool can advantageously be used as a hand-held power tool for screwing, drilling, sawing, sanding, and the like, a high output torque with a low reaction torque being achievable as a result of the intermittent drive mechanism.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: February 9, 1999
    Inventors: Andreas Peisert, Wolfgang Kofink, Michael Nothofer, Manfred Ludwig
  • Patent number: 5322136
    Abstract: An air percussion hammer drill is disclosed for operation in an earthen formation. The air compression hammer mechanism comprises a piston that reciprocates while simultaneously rotating within its housing. A hammer drill bit slidably keyed to the bottom of the piston transfers the impact energy to the formation and rotates during operation independent of an attached drill string.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: June 21, 1994
    Assignee: Smith International, Inc.
    Inventors: Huy D. Bui, Michael S. Oliver
  • Patent number: 5305672
    Abstract: Driving means in particular for a cutting-off device with a rotationally held cutting-off tool. In order to provide the cutting-off tool with high acceleration in a simple manner, a sledge hammer (6) is provided that cooperates with an impact surface (5) arranged on a rotationally held cutting-off tool (4). Furthermore, a cam (2) is arranged on at least one driven rotating inertial body (1) for acting upon said sledge hammer, whereby said inertial body (1) is driven at an essentially constant, optionally adjustable speed.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: April 26, 1994
    Inventor: Ludwig Balint
  • Patent number: 5156223
    Abstract: A downhole oil well tool uses impact, reciprocal drilling and an improved rotating bit or like working member, receiving both fluid pressure and weight from an elongated pipe string with a flow bore in order to drive the tool. A valve within tool housing controls fluid pressure to the working end so that the tool pressures up, then releases pressure through the working member allowing the pipe string to load the bit, creating impact. A clutch rotates the working member during drilling to prevent imprint upon the formation. A bias spring is provided to control and adjust the amount of weight on the bit independent of pipe weight.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: October 20, 1992
    Inventor: James E. Hipp
  • Patent number: 4958691
    Abstract: A downhole oil well tool uses impact, reciprocal drilling and an improved rotating bit or like working member, receiving both fluid pressure and weight from an elongated pipe string with a flow bore in order to drive the tool. A valve within tool housing controls fluid pressure to the working end so that the tool pressures up, then releases pressure through the working member allowing the pipe string to load the bit, creating impact. A clutch rotates the working member during drilling to prevent imprint upon the formation.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: September 25, 1990
    Inventor: James Hipp
  • Patent number: 4209070
    Abstract: The drill has a housing receiving therein a reciprocating striker, effecting percussive action upon the tool for breaking the rock at the face of the hole, mounted at the forward part of the housing, and upon the housing itself for propelling the drill in the hole. The housing also receives therein a mechanism for rotating the tool, including a self-controlled coupling provided with a movable sleeve and a stationary sleeve and adapted to transmit a torque to the tool in only one direction of rotation. The drill is provided with a device preventing a rearward motion of the housing and its rotation during a drilling operation. The drill is characterized by having a return device for retracting the tool from the face after it has been struck by the striker.
    Type: Grant
    Filed: January 10, 1978
    Date of Patent: June 24, 1980
    Inventors: Boris V. Sudnishnikov, Veniamin V. Kamensky, Eduard P. Varnello, Sergei K. Tupitsyn, Boris V. Nazarov
  • Patent number: 3978931
    Abstract: The machine has a braking arrangement for retaining it against rearward motion and rotation and includes a housing accommodating therein a hammer reciprocable in operation of the machine and adapted to strike the head part of the housing, the latter having a drilling tool rigidly connected thereto. The tail part of the housing supports a sleeve rigidly connected with the braking arrangement. The housing and the sleeve are connected so that the housing is rotatable and axially displaceable relative to the sleeve. The drilling tool rotating mechanism is positioned intermediate the sleeve and the housing and includes a helicoidal couple made up by a helicoidally threaded rod rigidly secured to the housing and a nut, the mechanism further including a freewheeling clutch of which the movable cage is made integral with the nut.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: September 7, 1976
    Inventors: Boris Vasilievich Sudnishnikov, Veniamin Viktorovich Kamensky, Eduard Petrovich Varnello, Sergei Konstantinovich Tupitsin, Boris Vladimirovich Nazarov
  • Patent number: RE36848
    Abstract: An air percussion hammer drill is disclosed for operation in an earthen formation. The air compression hammer mechanism comprises a piston that reciprocates while simultaneously rotating within its housing. A hammer drill bit slidably keyed to the bottom of the piston transfers the impact energy to the formation and rotates during operation independent of an attached drill string.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: September 5, 2000
    Assignee: Smith International, Inc.
    Inventors: Huy D. Bui, Michael S. Oliver