Worm Patents (Class 74/500)
  • Patent number: 10473201
    Abstract: A double eccentric positioning apparatus uses two equal offset eccentric bushings to accurately position a tool (such as a drill bushing) in two dimensions. Miniature servo motors and precise gearing control the rotation of each eccentric bushing, which controls the direction of the offset vectors. The offset vectors are used to determine the final position of the drill bushing. The desired rotation angles can be mathematically calculated based on desired position. The inner eccentric bushing is located concentric to the offset of the outer eccentric bushing. This allows any position, within a radius of two times the eccentric offset, to be achieved. The use of worm gearing on the eccentric bushings prevents back-driving of the servo motors, due to the lead angle of the worm gears, and the friction between the worm wheel and worm gear.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: November 12, 2019
    Assignee: The Boeing Company
    Inventors: Stephan J. Favilla, Alan Ray Merkley, Christie Dusty Lagally, Ronald J. Collins
  • Patent number: 9438086
    Abstract: An electric push bar assembly includes an electric push bar including a retractable tube and a connector, and a release mechanism including a connection socket connected to the retractable tube, a fixed socket connected to the connector, a clutch socket axially slidably coupled to the connection socket and having a plurality of engagement tooth blocks respectively engaged with respective engagement teeth of the fixed socket and a rotary operating member mounted around the fixed socket and operable to disengage the engagement tooth blocks of the clutch socket from the engagement teeth of the fixed socket for allowing adjustment of the retractable tube manually.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: September 6, 2016
    Inventor: Chih-Li Hung
  • Publication number: 20120103129
    Abstract: A gearbox assembly for an electric power assisted steering assembly comprises a gearbox housing (20), an output shaft (23), a wheel gear assembly (22) comprising a hub (21) which is fixed to the output shaft by a locating means so as to prevent relative rotational and axial movement between the hub and the output shaft and a gear wheel fixed to the hub, at least one support bearing assembly (25,26) which supports the output shaft relative to the gearbox housing (20), a worm gear which engages the wheel gear (22), and a coupling for transmission of torque from the output shaft to an intermediate shaft that is external to the gearbox housing. The coupling includes a fixing part (31) which is fixed to the output shaft (23) through the gear assembly and the support bearing assembly is provided on the opposite side of the gear assembly (22) to the coupling (31) such that the gear assembly (22) is overhung from the portion of the output shaft supported by the bearings (25,26).
    Type: Application
    Filed: March 24, 2010
    Publication date: May 3, 2012
    Inventors: Mark Anthony Wilkes, Guillaume Laudijois
  • Publication number: 20110011666
    Abstract: An input gear rotates integrally with an input shaft, and an output gear rotates integrally with an output shaft. Pinion gears are rotatably supported by pinion gear shaft members, respectively, and are meshed with both of the input gear and the output gear. An inner end part of each pinion gear shaft member is fitted to an inner peripheral wall of a corresponding primary hole of an inner ring member, and an outer end part of each pinion gear shaft member is fitted to an inner peripheral wall of a corresponding secondary hole of an outer ring member.
    Type: Application
    Filed: July 13, 2010
    Publication date: January 20, 2011
    Inventors: Masashi HORI, Nobuhiko Uryu
  • Patent number: 7299712
    Abstract: The present invention relates to an energy storage disconnecting switch used in extra-high voltage and ultra-high voltage grid, in particular, relates to a scissor-type disconnecting switch. With the principle of storing energy in spring, the present invention provides an energy storage spring case having energy storage spring therein, to release the spring energy to operate the disconnecting switch by using the stored energy, to satisfy the need for quick action of the electric disconnecting switch.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: November 27, 2007
    Inventor: GuangShun Wang
  • Patent number: 7041022
    Abstract: An actuator for superimposed steering engagement in a vehicle steering system having first and second input shafts, an output shaft coaxial with the first input shaft, and a superposition gear disposed between the shafts. The superposition gear has a two-stage, modified planetary gear that has respective sun wheels fixed on the first input shaft and the output shaft, respectively, a satellite carrier that can be driven by the second input shaft, and at least one stepped planet with two respective planet wheels that mesh with the sun wheels. The planet wheels are, spaced apart axially from one another, one on each end portion of a smaller-diameter shaft portion with which they are integral.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: May 9, 2006
    Assignee: Robert Bosch GmbH
    Inventors: Michael Bock, Willi Nagel
  • Patent number: 6763738
    Abstract: An electric power steering apparatus having a reduction mechanism in which an inner peripheral face of a fitting hole provided to a gear housing is formed into an inclined face inclined with respect to a worm shaft so as to fit with and hold a bearing to which a worm shaft for transmitting rotating force of a steering assisting motor to a steering shaft provided with a worm wheel, an inclined contact surface in contact with the inclined face is provided on an outer periphery of the bearing, and the inclined contact surface of the bearing is moved along the inclined face of the fitting hole to adjust a distance between a shaft center of the worm shaft and a rotation center of the worm wheel.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: July 20, 2004
    Assignee: Koyo Seiko Co., Ltd.
    Inventors: Takashi Tsutsui, Masayuki Watanabe
  • Patent number: 6405612
    Abstract: An electric steering column for a motor vehicle is provided, which has a steering shaft. A jacket tube extends along the steering shaft to cover the same. A worm wheel is rotatably held by the jacket tube and has a center bore through which a given portion of the steering shaft loosely passes. A collar member is tightly disposed on the given portion of the steering shaft defining an annular clearance between the collar member and the worm wheel. An elastically deformable structure is put and compressed in the annular clearance in such a manner as to induce a rotation of the collar member when the worm wheel is rotated. An electric motor rotates the worm wheel with an electric power. Due to provision of the elastically deformable structure, a possible ill-alignment between the worm wheel and the collar member is absorbed or compensated.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: June 18, 2002
    Assignee: Fuji Kiko Co., Ltd.
    Inventors: Satoshi Kinoshita, Toshihiko Warashina
  • Patent number: 6394220
    Abstract: An electric power steering device transmits rotation of an electric actuator for generating auxiliary steering power to a wheel via a worm and a worm wheel. The worm wheel is molded from pelletized synthetic resin material. A number average molecular weight of the pelletized synthetic resin material is greater than or equal to 30,000 and less than or equal to 60,000.
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: May 28, 2002
    Assignee: Koyo Seiko Co., Ltd.
    Inventors: Takanori Kurokawa, Hirokazu Arai
  • Patent number: 6272942
    Abstract: A worm gear unit having at least one worm shaft displaceable in the axial direction, means with which the worm shaft can be secured once in the axial direction in order to set the play being provided according to the invention, the means being permanently secured after the play has been set.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: August 14, 2001
    Assignee: Mannesmann VDO AG
    Inventor: Otmar Ganser
  • Patent number: 6269709
    Abstract: An apparatus (10) includes first (20) and second (40) meshing gears, a rotatable eccentric (50), a torsion spring (70), and a rotation blocking member (80). The first gear (20) is rotatable about a first axis (22) and the second gear (40) is rotatable about a second axis (42). The rotatable eccentric (50) supports the first gear (20) for rotation about the first axis (22). Rotation of the eccentric (50) in a first direction (54) causes the first axis (22) and the first gear (20) to move toward the second axis (42). The torsion spring (70) biases the eccentric (50) for rotation in the first direction (54). The rotation blocking member (80) prevents rotation of the eccentric (50) in a second direction (56) opposite the first direction (54).
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: August 7, 2001
    Assignee: TRW Inc.
    Inventor: Henry C. Sangret
  • Patent number: 6240800
    Abstract: An electromotoric operating mechanism, such as a single drive or dual drive, for height adjustment of an article of furniture, especially for furniture items useful in the field of hospitals and/or nursing, includes a drive having an output member in the form of a worm wheel, a spindle mechanism including an adjusting spindle in driving relationship with the drive, and a spindle nut mounted on the adjusting spindle and interacting with a link member in fixed rotative engagement with a shaft of an adjustable piece of furniture, and a clutch mechanism releasably coupling the output member with the adjusting spindle. The clutch mechanism includes a guide member, which is fixedly secured on the adjusting spindle, and a clutch gear, with the worm wheel rotatably mounted on the guide member. The clutch gear is arranged on the guide member in fixed rotative engagement but axially displaceable relative thereto.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: June 5, 2001
    Assignee: Dewert Antriebs- und Systemtechnik GmbH & Co. KG
    Inventors: Ralf Bokämper, Andreas Roither
  • Patent number: 6044723
    Abstract: An electric power assisting steering apparatus comprises a housing, a motor mounted on the housing to generate auxiliary steering power in a rotating shaft, an output shaft to transmit the steering power for steering the wheels, a bearing for supporting the output shaft to be freely rotatable, and a worm gear mechanism having a worm connected to the rotating shaft and a worm wheel connected to the output shaft, to transmit the auxiliary steering power of the motor to the output shaft. An elastic body is provided between at least one of the rotating shaft and the housing and the bearing, so that when a tooth surface of the worm and that of the worm wheel are brought into contact with each other, the rotating shaft is moved in at least one of the axial direction and the radial direction relative to the housing by deforming the elastic body.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: April 4, 2000
    Assignee: NSK Ltd.
    Inventors: Hiroshi Eda, Yuji Kawaike, Masuji Machida
  • Patent number: 5590566
    Abstract: A servo-assisted rack-and-pinion steering system has a helical-toothed rack and a helical-toothed pinion cooperating therewith. On the transmission of forces between the pinion and the rack, a torque relative to the longitudinal axis of the rack acts on the rack. The resulting rotation of the rack is utilized to control the servomotor via a lever arrangement.
    Type: Grant
    Filed: June 28, 1995
    Date of Patent: January 7, 1997
    Assignee: Mercedes-Benz AG
    Inventors: Wolfgang Joerg, Bernd Langkamp
  • Patent number: 5193848
    Abstract: A motor vehicle adjustable safety steering column for a motor vehicle, including a column with an air bag, has a steering spindle which can be pushed together in a telescope-type manner and is disposed in outer casing tube parts. The steering column are supported by way of a deformation element. The deformation element comprises a first outer casing tube part which, on the end side, is supported on an inner casing tube to envelope the deformation element. This casing tube has a toothed rack into which a pinion of an adjusting device engages for axial displacement of the steering column. Thus, a steering column of compact construction can be both axially adjustable and have an energy-absorbing effect.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: March 16, 1993
    Assignee: Dr. Ing. h.c.F. Porsche AG
    Inventor: Hans-Joachim Faulstroh
  • Patent number: 5099760
    Abstract: Apparatus for affecting positional adjustment of a machine member has an adjustment screw nonrotatably connected to the machine member and screwed into a nut formed as a worm wheel. The worm wheel, meshes with a worm, connected by a worm shaft to an actuator assembly for rotating the worm. The worm shaft is rotatably and axially displaceably mounted in a housing in which the worm wheel is rotatably mounted and the worm shaft is rotatably and axially non-displaceably mounted in a slider, which is guided in the housing for movement in the axial direction of the worm shaft. The slider is reciprocable by a fluid-operable piston-cylinder unit to an extent which corresponds to the desired adjustment of the screw.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: March 31, 1992
    Assignee: Windmoller & Holscher
    Inventor: Horst Schneider
  • Patent number: 4979478
    Abstract: A control cable which transmits a one-way compressive force in a first direction to actuate a fuel control and which exerts zero force in the return direction.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: December 25, 1990
    Assignee: Cable Manufacturing and Assembly Company, Inc.
    Inventor: William L. Sheppard
  • Patent number: 4961392
    Abstract: A self-locking mechanical steering helm for a boat includes a worm gear set having a worm fixed on the steering wheel shaft and a worm gear clustered with a cable sprocket for controlled the movement of the steering cable which extends to the outdrive of the boat.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: October 9, 1990
    Assignees: Jim Danbom, Jan Danbom
    Inventor: Elmer I. Ballard
  • Patent number: 4884544
    Abstract: A control cable which transmits a one-way compressive force in a first direction to actuate a fuel control and which exerts zero force in the return direction.
    Type: Grant
    Filed: April 12, 1988
    Date of Patent: December 5, 1989
    Assignee: Cable Manufacturing and Assembly Company, Inc.
    Inventor: William L. Sheppard
  • Patent number: 4774849
    Abstract: A steering gear mechanism includes a housing and a worm gear having an input portion. The worm gear is supported for rotation in the housing. A sector gear has teeth in meshing engagement with teeth formed on the worm gear. The sector gear has an output portion. A circumferentially expandable spring pin supports the sector gear for pivotal movement relative to the housing and biases the sector gear into meshing engagement with the worm gear to compensate for wear of the gears. The housing has means for supporting the spring pin.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: October 4, 1988
    Assignee: TRW Inc.
    Inventors: E. David Venable, David C. Shropshire, G. David Fetters
  • Patent number: 4751444
    Abstract: A direct current (DC) powered gyroscope (41) utilizes an alternating current (AC) subsystem in which electrolytic switches (49, 50) control torquer motors (45, 46). The alternating current is obtained from commutation circuitry (21-23) in the gyroscope spin motor, so that the spin motor performs an inverter function. Advantages include reduced costs and the ability to operate the gyroscope (41) without an AC power supply.
    Type: Grant
    Filed: April 25, 1986
    Date of Patent: June 14, 1988
    Assignee: Allied-Signal Inc.
    Inventor: Maurice M. Orlarey
  • Patent number: 4217793
    Abstract: This invention pertains to a rack and pinion type steering gear for an automobile comprising a housing; a pinion rotatably supported in said housing to receive turning effect from a steering wheel of the automobile; and a rack meshed with the pinion and slidably supported in the housing, the rack being connected to a tie rod which is in turn connected to the front wheels of the automobile. The pinion comprises first and second pinion portions rotatable separately from each other and having spiral gear teeth provided reversely to each other, respectively, the first pinion portion being connected to the steering wheel and the second pinion portion being meshed with the rack.
    Type: Grant
    Filed: June 21, 1978
    Date of Patent: August 19, 1980
    Assignee: Tokai TRW & Co., Ltd.
    Inventor: Michio Abe