Element Is A Torsion Bar Having A Longitudinal Axis Coincident With The Rotational Axis Patents (Class 464/97)
  • Patent number: 11273610
    Abstract: A flexible composite driveshaft is formed by modifying the shape of a preliminary composite driveshaft. A fiber tape is applied to a temporary mandrel using automated fiber placement to form a preliminary composite driveshaft having a flexible shaft element with an initial geometry. The temporary mandrel from the preliminary composite driveshaft is removed and the initial geometry of the flexible shaft element is modified to form the flexible composite driveshaft having a flexible shaft element with a final geometry.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: March 15, 2022
    Assignee: Goodrich Corporation
    Inventors: Brayton Reed, Joyel M. Schaefer, Mark R. Gurvich, Gianfranco Barbato
  • Patent number: 11020827
    Abstract: A torsion bar includes a central portion extending in an axial direction about a longitudinal axis. The torsion bar also includes a first end portion having a splined outer surface, the first end portion disposed proximate a first end of the torsion bar, the first end portion spaced from the central portion with a first annular groove extending circumferentially about the torsion bar.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: June 1, 2021
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Eric D. Pattok, Sai Saagar Adimulam, Mark A. Wolfer
  • Patent number: 10948007
    Abstract: A torque transmitting shaft includes a first member and a second member. The first member extends along an axis and has an inner surface extending between a first end and a second end. The inner surface defines a plurality of first engagement elements disposed proximate the first end. The second member extends along the second axis and has a first end portion and an intermediate portion extending from the first end portion. The first end portion has a first spline portion and each member of the first spline portion is received within corresponding engagement elements of the plurality of first engagement elements.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: March 16, 2021
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Steven M. Thomas, Jon N. Miller, Eduardo R. Mondragon-Parra, Brian J. Kleinfeld
  • Patent number: 10753385
    Abstract: An electronic power steering system includes: an input shaft connected to a steering shaft; an output shaft to which one end of the input shaft is connected; and a torsion bar inserted into the input shaft and the output shaft and connecting the input shaft and the output shaft, in which the torsion bar includes a first torsion bar including a first fastening portion connected to the input shaft, a second fastening portion connected to the output shaft, and a first beam portion connecting between the first fastening portion and the second fastening portion, and formed as a hollow body, and a second torsion bar including a third fastening portion coupled into the first fastening portion, a fourth fastening portion coupled into the second fastening portion, and a second beam portion connecting between the third fastening portion and the fourth fastening portion.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: August 25, 2020
    Assignee: MANDO CORPORATION
    Inventor: Hyun Bi Kwon
  • Patent number: 10436320
    Abstract: A transmission structure for a vehicle, the transmission structure including: a transmission having a plurality of speed change stages, the transmission including a speed change operation mechanism that has an output portion receiving an input motion produced by an actuator as an operation driving source and changing a speed change stage of the transmission, and a transmission case that houses the speed change operation mechanism, a part of the speed change operation mechanism being a torsion bar as a torque transmitting member, and a rear end gear being disposed on an end portion of the torsion bar; the transmission case including a boss portion holding an intermediate portion in an axial direction of the torsion bar.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: October 8, 2019
    Assignee: HONDA MOTOR CO. LTD.
    Inventors: Yasushi Fujimoto, Taku Hirayama, Hiroyuki Makita, Yukio Yokogawa
  • Patent number: 10077102
    Abstract: Multiple redundant harmonic drive motors on a rotor head actuate the angle of attack of rotor blades at the rotor blade roots, providing collective control that, in combination with a system for providing cyclic control on the rotor blades, eliminates the need for a swashplate, thereby advantageously reducing the weight and maintenance cost of a helicopter, increasing its reliability, and reducing its vulnerability to ballistic attack.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: September 18, 2018
    Assignee: Orbital Research Inc
    Inventors: Matthew C. Birch, Zak Sowle
  • Patent number: 10054167
    Abstract: A two-stage stiffness driveshaft includes a hollow cylinder having first and second ends and a hollow cylinder stiffness. An inner shaft having first and second ends and an inner shaft stiffness extends through the hollow cylinder. The inner shaft's first end and the hollow cylinder's first end are engaged via a rotational clearance fit. The inner shaft's second end is rotationally fixed to the hollow cylinder's second end to permit the inner shaft's first end to twist through a predetermined angle relative to the inner shaft's second end. The inner shaft's stiffness defines the driveshaft's first-stage stiffness, while the combined stiffness of the inner shaft and the hollow cylinder defines the driveshaft's second-stage stiffness. A damping element positioned between the inner shaft and the hollow cylinder controls variation in torque transmitted by the driveshaft and generates gradual transition between the first-stage stiffness and the second-stage stiffness.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: August 21, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Paul A. Piorkowski, Michael J. Grimmer, Mark Gehringer, Stephanie A. Erntser, Eric J Defenderfer, Stephen H. Miller
  • Patent number: 9945415
    Abstract: A torque transmitting shaft includes a first member and a second member. The first member extends along an axis and has an inner surface extending between a first end and a second end. The inner surface defines a plurality of first engagement elements disposed proximate the first end. The second member extends along the second axis and has a first end portion and an intermediate portion extending from the first end portion. An end of the intermediate portion is fixedly attached to the second end. The first end portion has a first spline portion and each member of the first spline portion is received within corresponding engagement elements of the plurality of first engagement elements.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: April 17, 2018
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Steven M. Thomas, Jon N. Miller, Eduardo R. Mondragon-Parra, Brian J. Kleinfeld
  • Patent number: 9763679
    Abstract: An instrumentation kit for use in preparing a bone to receive a prosthetic component includes at least one first combination device, the at least one first combination device including a proximal portion configured to couple with a torque providing device and a distal portion configured to couple with a first instrument, the at least one first combination device pivotable between a first position whereat the proximal portion and the distal portion are (i) longitudinally aligned and (ii) configured to transfer a torque received by the proximal portion to the distal portion, and a second position whereat the proximal portion and the distal position are (i) not longitudinally aligned and (ii) configured to transfer a torque received by the proximal portion to the distal portion.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: September 19, 2017
    Assignee: DePuy Synthes Products, Inc.
    Inventor: Kyle Lappin
  • Patent number: 9360080
    Abstract: A parallel, torque additive torsional compensating device for an internal combustion engine is provided. The torsional compensating device comprises a first gear, a first joint assembly, an intermediate shaft, a second joint assembly, a torsional element, and a second gear. The first gear and the second gear are in respective driving engagement with a first engagement portion and a second engagement portion of an output of the engine. The intermediate shaft is in driving engagement with the first joint assembly and the second joint assembly. The torsional element is in driving engagement with the second joint assembly and the second gear. An angular deviation of at least one of the first joint assembly and the second joint assembly causes a cyclical acceleration of the torsional element. The cyclical acceleration applies a torque to the output of the internal combustion engine through the second gear and the second engagement portion.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: June 7, 2016
    Assignee: Dana Limited
    Inventors: Mark R. J. Versteyhe, Stijn Goossens
  • Patent number: 9172286
    Abstract: Disclosed is a leveling motor, which removes a gap from a threaded portion converting a rotating force of the leveling motor into an axial feeding force to minimize a movement error and enable a leveling operation to be precisely controlled, and includes a housing, a shaft axially moving in the housing and having on an outer circumference thereof a threaded portion, a threaded pipe provided on an outer circumference of the shaft and having on an inner circumference thereof a grooved portion that corresponds to the threaded portion, and an elastic member supplying an upward elastic force to the shaft, whereby the threaded portion axially comes into close contact with the grooved portion by the elastic force of the elastic member.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: October 27, 2015
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Suhyoung Lee
  • Patent number: 9035510
    Abstract: An electro-mechanical energy conversion device is provided having an armature with a central cavity. The armature is rotatably mounted in a frame. A torsion bar is positioned within the armature with one end connected to the armature and the other end connected with an energy source or consuming device.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: May 19, 2015
    Assignee: BorgWarner, Inc.
    Inventor: Roger T. Simpson
  • Patent number: 8998732
    Abstract: A device for damping vibrations in a drive train, in particular for plug screws in the pulp and paper industries. The device is principally characterized in that a cylindrical shaft, preferably designed as a hollow shaft, is provided, wherein the cylindrical shaft is arranged between the halves of a coupling and at least one ring having friction surfaces is arranged around the cylindrical shaft. Stick-slip vibrations that occur can thereby be favorably eliminated, and thus the gearbox and the motor of the drive train can be protected.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: April 7, 2015
    Assignee: Andritz AG
    Inventor: Roman Eichinger
  • Publication number: 20140274423
    Abstract: A vehicle steering assembly comprising an input member, an output member, and a torsion bar coupling the input member to the output member. The torsion bar includes primary and secondary load structures, and the secondary load structure is inoperative below a transition torque. The primary load structure includes a primary torque member that constantly couples the input member to the output member throughout an operative range of the steering assembly. The secondary load structure includes first and second torque members that are separated by a gap when the assembly encounters a torque below the transition torque and that contact each other when the assembly encounters a torque above the transition torque. The first torque member can comprise a tubular structure surrounding the primary torque member. The tubular structure includes an opening defining a circumferentially-exposed surface, and the second torque member includes a radially-extending arm positioned in the opening.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: HB Performance Systems, Inc.
    Inventors: Tim Osterberg, Rod Weekley, Patrick Schwobe
  • Patent number: 8771091
    Abstract: A two-torque-producing connecting rod assembly used in combination with a hand tool is provided with a rod and a connecting member. The rod is polygonal and includes a big first section, a small second section and a connecting portion. The connecting member is a hollow cylindrical structure sleeved on the rod and has an inserting cavity and a stepped receiving cavity. The receiving cavity includes an outer section, an inner section and a middle section which is smaller in diameter than the outer section but larger than the inner section, the outer section includes plural alternatively-arranged arc-shaped concave portions and pointed convex portions. When the first section of the rod is inserted in the outer section of the connecting member, plural angles of the first section are disposed between the arc-shaped concave portions and restricted to move between the two ends by the pointed convex portions.
    Type: Grant
    Filed: March 9, 2013
    Date of Patent: July 8, 2014
    Inventor: Ying-Mo Lin
  • Publication number: 20130040741
    Abstract: A joint arrangement for use in a motor vehicle includes a joint housing, an input shaft securely connected to the joint housing, a jointed shaft disposed in the joint housing for conjoint rotation by a tripod bearing assembly, and a flexurally elastic connecting arrangement connected to the input shaft by a fixing region. The flexurally elastic connecting arrangement provides at least one defined bending region.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 14, 2013
    Applicant: DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT
    Inventors: Paul Hurmer, Dietmar Becker
  • Patent number: 8042526
    Abstract: A torsion damping mechanism for a rotary blower is provided that includes an input hub adapted to engage a first end of a torsion spring and an output hub adapted to engage a second end of the torsion spring. An intermediate hub is fixed for rotation with a first drive member. A bearing member includes an inner portion connected for rotation with the intermediate hub and an outer portion connected for rotation with the output hub. The bearing member may be a one-way bearing that permits torque to flow from the output hub into the intermediate hub and the first drive member when the output hub is driven in a first rotational direction, and permits the output hub to rotate relative to the intermediate hub with no substantial torque transfer therebetween when the output hub is driven in a second rotational direction.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: October 25, 2011
    Assignee: Eaton Corporation
    Inventors: Christopher Suhocki, Mark H. Pratley, Christopher W. Creager, Daniel R. Ouwenga
  • Publication number: 20100279780
    Abstract: A multi-part drive shaft for a transit vehicle door comprises an upper drive shaft connected to a door operating mechanism and having a door panel operating arm extending therefrom, a lower drive shaft journaled for rotation, a door panel operating arm extending therefrom and a flexible drive shaft secured at one end to the upper drive shaft and at the other end to the lower drive shaft. Rotation of the upper drive shaft will transfer torque to the lower drive shaft at the same angular speed.
    Type: Application
    Filed: July 24, 2008
    Publication date: November 4, 2010
    Applicant: WABTEC HOLDING CORP.
    Inventor: Peter Heidrich
  • Patent number: 7798283
    Abstract: A power steering driving device 100 includes an input shaft 6 provided with a serration 8 and connected to an input mechanism 3 linked to a steering handle 2, an output shaft 7 provided with a serration 10 and connected to an output mechanism 5 linked to a vehicle wheel 4, and a torsion bar 15 that connects the input shaft 6 and the output shaft 7 coaxially. The serration 8 of the input shaft 6 and the serration 10 of the output shaft 7 are formed such that a ratio between the respective numbers of teeth thereof is a decimal, and to specify a relative rotation position of the input shaft 6 and the output shaft 7 relative to the input mechanism 3 and the output mechanism 5, a tooth on the serration 8 of the input shaft 6 and a tooth on the serration 10 of the output shaft 7 having a relative position deviation angle about an identical central axis which is equal to or smaller than an allowable value are selected as reference teeth.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: September 21, 2010
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Takashi Kokubo, Yoshizo Watanabe, Masataka Hayashi
  • Patent number: 7503431
    Abstract: A mechanical rotational drive has a bar-like torsion element, whereby the torsion element is firmly clamped with a first end in a bearing device. The torsion element can be pivoted with a second free end with respect to the clamped end about the longitudinal axis, forming a rotation axis, of the torsion element between a relaxed position and a tensioned position, whereby the length of the torsion element is reduced with respect to the relaxed position when the torsion element is brought into its tensioned position.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: March 17, 2009
    Assignee: Eads Space Transportation GmbH
    Inventors: Franz Sperber, Walter Stich, Leonhard Stielner, Adalbert Wagner
  • Patent number: 7182158
    Abstract: In a drilling device with a drive unit for rotation and advance the rod assembly has a plurality of pipe sections interconnected by means of plug-type connections torque proof in both directions. A tension rod protrudes through the interior of the rod assembling. The pipe sections are braced among each other with aid of the tension rod. The tension rod can be made of pipe sections or of a tension rope and allows the possibility, that the rope assembly can be moved in its integrity against the drilling direction.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: February 27, 2007
    Assignee: Tracto-Technik GmbH
    Inventor: Gerhard Völkel
  • Patent number: 6443284
    Abstract: Disclosed herein is an apparatus and system for isolating torsional vibrations in a driveline having a friction torque device and a ratio-change transmission. The friction torque device includes a driven member having radially extending projections for coupling the friction torque device to a shaft. The apparatus comprises a rotatably supported input shaft having a first end, a second end and an inner bore. A plurality of projections are disposed adjacent to the first end of the input shaft for engaging the radially extending projections of a driven member. The apparatus further comprises a torsion bar having a torsional spring rate, where the torsion bar is at least partially disposed within the bore of the input shaft. The torsion bar has a first end and a second end, the second end of the torsion bar is coupled to the input shaft.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: September 3, 2002
    Assignee: Eaton Corporation
    Inventor: Dale A. Stretch
  • Patent number: 6375574
    Abstract: A torsional vibration damper, which may be in the form of a twin mass flywheel, and which has an input member (11) designed to rotate generally in a first plane (A1), an output member (12) designed to rotate generally in a second plane (A2), relative rotation of the input and output members being possible against the action of a link-type damper (40). The damper is arranged to allow the first and second planes in which the input and output members rotate to tilt relative to each other during use of the damper to relieve internal stresses. This ability to tilt may be provided by self-aligning main bearings (50) or by the use of self-aligning pivot bearings (65) in the link-type damper.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: April 23, 2002
    Assignee: AP TMF Limited
    Inventors: A J Young, J F Fitzpatrick-Ellis, A J Lambert
  • Patent number: 6318923
    Abstract: A coupling comprises blade flexures that connect two end members through which control rods extend to cross members that are attached near the mid-points of the blade flexures, providing stable-linear load reaction means for use as end pivots for linkages where stick-slip motion is undesirable. The blade flexures are housed in a rigid cage comprising four separators that are attached to end members, and the flexures are attached to the end members by the separators.
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: November 20, 2001
    Assignee: Honeywell International Inc.
    Inventor: Toren S. Davis
  • Patent number: 6296096
    Abstract: A shaft coupling having two attachment elements that are rotatable relative to one another and that are connected to one another by a rotationally resilient assembly, and further having a dampening device which is active between the attachment elements for the purpose of suppressing torsional vibrations of the rotationally resilient assembly is disclosed. The rotationally resilient assembly comprises two ramp discs that are rotatable relative to one another and that support one another at least indirectly. One disc is supported in a rotationally fixed and rigid manner on one of the attachment elements and the other disc is supported in a rotationally fixed and axially resilient manner on the other one of the attachment elements by a spring. The dampening device is a viscous coupling having a hub connected to one of the attachment elements and a housing connected to the other one of the attachment elements.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: October 2, 2001
    Inventor: Adrian Chludek
  • Patent number: 6095923
    Abstract: A propeller shaft comprises two torque transmission members, a viscous fluid damper and a torsion bar which are arranged in parallel between the torque transmission members, and a stopper for restricting the maximum torsion angle of the torsion bar. Thus, torsional vibration characteristic is adjusted in a wide range. Accordingly, a vibration a and noise in a power transmission system can be prevented, and also, a starting acceleration performance of a vehicle can be improved.
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: August 1, 2000
    Assignee: Viscodrive Japan Ltd.
    Inventor: Hayashi Kageyama
  • Patent number: 5924929
    Abstract: A flexible drive shaft for connection to the rotor of a progressive cavity pump or motor, in which the drive shaft 7, provided with a coating 26, is formed of titanium or similar metal. A relatively inexpensive metal flanged head portion is fastened, e.g. by adhesive, to an end portion 12, of the drive shaft, and is bolted to the rotor 10. The structure enables a relatively shorter drive shaft to be used which is capable of transmitting heavy torque.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: July 20, 1999
    Assignee: Mono Pumps Limited
    Inventor: Michael Silver
  • Patent number: 5823499
    Abstract: A drive apparatus includes an electric motor, a speed reducer and a coupling member located between the motor and the speed reducer. The output shaft of the motor and the input shaft of the speed reducer are provided with longitudinally extending grooves having a square or rectangular cross section in which barrel members having the mating cross section are inserted, respectively to absorb any gap therebetween. The box like barrel member has four segments which are brought into resilient contact with the groove.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: October 20, 1998
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Sadao Ito, Haruo Kato
  • Patent number: 5697847
    Abstract: A viscous damped driveline coupling has two concentric tubes concentric with a torsion bar where the torsion bar is nonrotatably connected to both a drive coupling and a driven coupling. An outer tube has a first end connected to the drive coupling and a second end connected to a driven ring where the driven ring contacts ring forks contacting the driven coupling at travel stops thereby providing for lost motion between the driven coupling and the outer tube. A concentric inner tube is connected to the driven coupling and is viscously coupled to the outer tube. As the torsion bar transfers relatively low levels of torque between the drive and driven couplings, the viscous layer between the outer and inner tubes provides viscous damping. Upon contacting the travel stops, the outer tube then carries any additional torque in the driveline coupling.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: December 16, 1997
    Assignee: Eaton Corporation
    Inventor: Lawrence L. Meyer
  • Patent number: 5680804
    Abstract: A steering valve (1) for supplying an actuator with hydraulic pressure, consists of an input shaft (2), an output shaft (3), a torque rod (4), connected at one end to the input shaft (2) and at the other end to the output shaft (3), and a valve sleeve (5) surrounding the input shaft (2). A torsionally resistant, axially elastic element (9) is contained within the steering valve (1), connected at one end to the input shaft (2) and at the other end to a catch device (10). The catch device (10) ensures no relative displacement between the valve sleeve (5) and the input shaft (2); prior to a predetermined degree of torque, and converts the torque acting upon the input shaft (2) to axial forces acting upon the elastic element (9) until a release position is reached. The elastic element (9) is mounted on the input shaft (2) by means of a bearing sleeve (11), which is fixed in an axial position on the input shaft (2).
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: October 28, 1997
    Assignee: TRW Fahrwerksysteme GmbH & Co. KG
    Inventor: Eugen Eberhart
  • Patent number: 5385507
    Abstract: A tensioning device for imparting torsional bias to a shaft. The tensioning device includes an adapter member connectable to the shaft for conjoint rotation therewith. A first hub member is selectively rotationally engageable with the adapter member. A first coupling member is attached to the first hub and a second coupling member is attached to the adapter member. The coupling members provide selective rotational engagement of the first hub member to the adapter member such that the first hub member and the adapter member are relatively rotatable with respect to one another through a preselected degree of relative rotation and such that the first hub member is engageable with the adapter member upon sufficient relative rotation of the first hub member in a first rotational direction with respect to the adapter member such that further rotation of the first hub member provides a corresponding rotation of the adapter member in the first rotational direction.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: January 31, 1995
    Assignee: Martin Engineering Company
    Inventors: Terry L. Swearingen, David W. Mueller
  • Patent number: 5378202
    Abstract: A tensioning device for imparting torsional bias to a shaft. The tensioning device includes a coupling member of resilient material having a first end and a second end. The first end of the coupling member is connected to the shaft for rotation therewith. A driven member is connected to the second end of the coupling member such that the driven member is relatively rotatable with respect to the shaft. A drive member is associated with the driven member for selectively rotating the driven member to any of a number of infinitely variable positions. The tensioning device is effective to rotate the shaft to a desired position and to store torsional force in the coupling member when the second end of the coupling member is rotated with respect to the first end of the coupling member. The tensioning device includes a torsion indicating member for indicating the amount of torsional force being applied to the shaft by the coupling member.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: January 3, 1995
    Assignee: Martin Engineering Company
    Inventor: R. Todd Swinderman
  • Patent number: 5322141
    Abstract: The wheel drive module comprises a motor (9), a casing (1) partially housing the motor, a wheel support platform (22), a wheel (R) rigidly mounted on the platform, a reduction transmission (31) engaging directly between the motor and the wheel, and a single main transmission shaft (12) bearing the rotor (13) of the motor as well as an input member (35) of the transmission.The casing (1) comprises on the side of the wheel, a fixing shank (18) externally receiving a bearing for said platform (22). The length of the shank is equal to the distance (d) between the input member (35) of the transmission (31) and the free end of the rear part of the platform (22). The reduction transmission (31) is housed in the platform (22). Finally a portion of the main transmission shaft that is torsionally deformable is housed inside the fixing shank.
    Type: Grant
    Filed: July 29, 1992
    Date of Patent: June 21, 1994
    Assignee: SMH Management Services AG
    Inventors: Raphael Brunner, Jacques Muller
  • Patent number: 5187997
    Abstract: A vehicle steering column which has an adjustable reach coupling in the form of a torsion bushing. The steering column has a first and second part which are slidably mounted one within the other and interconnected by the torsion bushing so as to absorb rotational backlash between the two parts of the steering column while transmitting torque through the two parts. The torsion bushing has first, second, and third zones continuous with one another and arranged so that the first and second zones are connected by the third zone and wherein the first and second zones are twisted relative to each other.
    Type: Grant
    Filed: November 20, 1991
    Date of Patent: February 23, 1993
    Assignee: The Torrington Company
    Inventor: Nicholas Henry-Moore
  • Patent number: 5115879
    Abstract: A power steering device comprising an input shaft connected to a steering shaft, an output shaft connected to a rack for driving vehicle wheels, a servo valve including a valve sleeve surrounding the input shaft and engaging the output shaft, and a torsion bar with both ends secured to the input shaft and the output shaft. In the power steering device, the torsion bar is positioned and secured via a balance pin in the input shaft. The balance pin has multiple projecting portions arranged alternately on opposite sides of the balance pin along the length of the balance pin. After inserting the balance pin into the input shaft and the torsion bar, the input shaft and the torsion bar are relatively rotated by the protruding portions of the balance pin. The servo valve is thus correctly centered. The hydraulic pressure produced by the servo valve is balanced.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: May 26, 1992
    Assignee: TRW Steering & Industrial Products (Japan) 051156651
    Inventors: Yoshihito Imura, Keita Ozeki
  • Patent number: 5085564
    Abstract: A flexible drive shaft for a helical gear pump having a rotor 10 in which the drive shaft 18 is formed with an enlarged, e.g. upset forged, head 20 and is provided with a plastics material coating 30. The drive shaft is held on to the rotor by bolts 40 passing through holes 28 in the head 20 and apertures 42 in a cap 32.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: February 4, 1992
    Assignee: Mono Pumps Limited
    Inventors: Roger L. Naylor, David K. Morris
  • Patent number: 5072650
    Abstract: An improved power steering system for motor vehicles of the type used for steering dirigible wheels is disclosed. In particular, the improved system is a rotary valve equipped power steering system in which the steering wheel is coupled to the rotary control valve via a coupling device having a rotational stiffness characteristic that is less than the rotational stiffness characteristic associated with the rotary valve itself.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: December 17, 1991
    Assignee: Techco Corporation
    Inventor: Edward H. Phillips
  • Patent number: 5033323
    Abstract: A manual transmission (14') having a counter-shaft assembly (50) with a torsion damping mechanism (34) disposed therein to mitigate in-gear rattle of transmission gears. The countershaft assembly is mounted for rotation in a transmission housing (36). Assembly (50) includes a cluster gear (58) having a plurality of ratio gears (68-76) fixed thereto, a driven gear (60) journaled on the cluster gear and stops (58f, 60g) to limit relative rotation. The torsion damping mechanism includes a torsion bar (64) fixed at its ends to driven and cluster gears (60, 58), an energy damper having coulomb friction surfaces engaged by Belleville springs (80) and by opposing axial forces provided by helical gear teeth of the countershaft assembly.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: July 23, 1991
    Assignee: Eaton Corporation
    Inventor: David A. Janson
  • Patent number: 5012874
    Abstract: The present invention relates to a tool head being movable between a component supply and a place, where a component is to be mounted. The tool head comprises a tool shaft (1). This can rotate in relation to the base structure of said tool head and is also axially displaceable in relation to said base. To reduce the inertia of the mass to be displaced and rotated the tool shaft (1) is irrotationally and axially movably supported in a front bearing (3). This front bearing (3) is rotatably and not axially movably supported in the base plate. The rotation of said bearing element (3) is realized by means of a driving motor (9) and a toothed belt (7). The shaft (1) is driven axially by a second driving motor (25) also provided with a driving belt (23). To this driving belt a support element (17) is attached. The support element (37) is guided by a linear guide bar (21) and is also connected to said tool shaft (1).
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: May 7, 1991
    Assignee: Mydata Automation AB
    Inventor: Lennart Stridsberg
  • Patent number: 4984776
    Abstract: An end attachment assembly for a twisted rope torsion bar includes an anchor nut and an internal elastomeric bushing cooperatively mating with the nut. The elastomeric bushing is molded onto the end of the twisted rope torsion bar. The torsion bar is fabricated of a lightweight glass fiber/epoxy composite material. The elastomeric bushing has external splines cooperating and mating with splines on the inner bore of the anchor nut. The end attachment assembly compresses the end of the twisted rope torsion bar to reduce stress concentration and prevent separation, i.e. the application of torque to the anchor nut transmits a like amount of torque to the elastomeric bushing to compress and more firmly grip the twisted rope torsion bar. The elastomeric bushing is compressed radially inwardly by the cam shape of the mating splines. Advantageously, the elastomeric bushing proportionally increases the grip on the end of the torsion bar so that the joint is made tighter and tighter under increased torque.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: January 15, 1991
    Assignee: General Motors Corporation
    Inventor: Jack E. Smith
  • Patent number: 4971267
    Abstract: A fuseable torsion shaft for use within an aircraft flight control surface actuation system. The fuseable torsion shaft includes a shear tube which exhibits high strength elastic characteristics during normal operation up to a predetermined shear torque level. Thereafter, a torsion shaft having lower strength plastic characteristics provides torque transmission capability for a limited deflection.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: November 20, 1990
    Assignee: Allied-Signal Inc.
    Inventors: James W. Fulton, Gregory D. Walborn
  • Patent number: 4957468
    Abstract: A hydraulic reaction force apparatus of a power steering device includes an input shaft, an output shaft, the input and output shafts being connected with each other to be pivotal through a predetermined angle, reaction force arms connected integrally with the input shaft and projecting radially therefrom, a pair of output shaft guide holes sandwiching each reaction force arm and disposed to oppose each other in a direction perpendicular to the reaction force arms, reaction force plungers slidably disposed in the guide holes, and a reaction force mechanism for biasing the reaction force plungers against the reaction force arms by a reaction force applied to the reaction plungers and related to running conditions. Each reaction force plunger includes a metal cylindrical member having a hollow portion open at a side opposite to that of the reaction force arms and a damping member mounted in the cylindrical member.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: September 18, 1990
    Assignee: Jidosha Kiki Co., Ltd.
    Inventors: Shigeru Otsuka, Hiroshi Ohsaki
  • Patent number: 4827786
    Abstract: There is provided a backlash control rotation gear assembly for robotic applications, with such assembly comprising an input device to provide rotational force of a predetermined maximum torque. The system further includes a first drive gear which is connected to the rotational input device and a second drive gear which is connected to the first drive gear by an elastic torsion spring preloaded with a predetermined spring torque force. An output driven gear is connected to a moveable robotic part to be rotated, with such driven gear being connected to the first and second drive gears, wherein the first drive gear is driven by the rotational input device and the second drive gear is driven indirectly by the input device through the preloaded elastic torsion spring.
    Type: Grant
    Filed: February 11, 1987
    Date of Patent: May 9, 1989
    Assignee: Cincinnati Milacron Inc.
    Inventor: Edward J. Bailey
  • Patent number: 4790792
    Abstract: A torsion damping assembly includes a spring or spring assemblies (20 or 108,110) and a viscous damper (22 or 106) adapted to be installed between input and output drives of a vehicle driveline. In one embodiment of the assembly the spring (22) is a torsion shaft. In the other embodiment (100) a housing member or assembly (112) contains the spring assemblies (108,110) and the viscous damper (106). The spring assemblies (108,110) are disposed in parallel relative and each assembly includes a plurality of helical coil springs (136) disposed in series.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: December 13, 1988
    Assignee: Eaton Corporation
    Inventor: Warren G. Bopp
  • Patent number: 4774847
    Abstract: Rotary pressure control valves in booster steering systems are rotated by manual force at the steering wheel against a return force, usually a steel torque rod which is twisted by rotation of the steering wheel. Upon release of steering force, the untwisting of the rod causes reverse rotation toward neutral shut-off, i.e., centered position, so that coacting pressure channels of relatively rotated valve components are closed. Such reverse rotation is effected herein with the aid of a metal bellows which is compressed by cam operation during twisting of the torque rod. Upon untwisting, the bellows expands and acts through the cam to exert a reverse rotary force on the valve components to effect complete centering. Upon reaching centered valve position, the cam serves as a detent to hold the centered position of the valve components.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: October 4, 1988
    Assignee: Zahnradfabrik Friedrichshafen, AG.
    Inventor: Werner Breitweg
  • Patent number: 4754659
    Abstract: A manually-operated automotive transmission has a cluster gear on which several forward drive input gears and the reverse drive input gear are formed integrally. The cluster gear has a central bore extending its full length. An input shaft clutched to as engine crankshaft is keyed at the end furthest from the engine to the far end of the cluster gear and has a loose fitting spline connection to the opposite end of the cluster gear. A portion of the input shaft between the clutch and the loose spline connection has relatively high torsional stiffness and strength, but the portion of the input shaft between the keyed connection and the loose spline connection has relatively low torsional stiffness and strength. The clearance between the teeth of the loose spline connection is sized so that relatively low torque is not transmitted through this connection. The clearance is taken up and engine torque transmitted through the loose spline connection when high operating torques are developed.
    Type: Grant
    Filed: November 6, 1986
    Date of Patent: July 5, 1988
    Assignee: Ford Motor Company
    Inventor: Donald R. Rietsch
  • Patent number: 4747796
    Abstract: Several embodiments of coupling devices for marine outboard drives for providing a coupling between an engine output shaft and the outboard drive, drive shaft. Each embodiment employs as the coupling a first portion that provides a relatively resilient driving connection for absorbing low speed torque vibrations and a second more rigid driving connection for providing a more positive power transmission at high speeds and high loads. In some embodiments, the more resilient connection is provided by a spring which may comprise either a torsional spring or a torsional coil spring. In other embodiments, elastomeric elements provide the driving connection.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: May 31, 1988
    Assignee: Sanshin Kogyo Kabushiki Kaisha
    Inventors: Tomio Iwai, Minoru Kawamura
  • Patent number: 4679638
    Abstract: A downhole motor has a rotor and a stator, of the progressive cavity type, inside a housing. A bearing shaft is mounted within the housing, with a bearing between the housing and the bearing shaft, and the bearing shaft is rotatable about the longitudinal axis of the bearing shaft and the housing. A flexible rod, with a connection on each end, extends between the rotor and the bearing shaft, for translating the rotation and gyration of the rotor to the true rotation of the bearing shaft. A cylindrical overload sub is located concentrically around the rod. A plurality of splines and slots on the connections engage a plurality of splines and slots on the sub to allow the connections to rotate axially a limited amount in relation to one another. Teeth may be used instead of splines and slots.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: July 14, 1987
    Assignee: Hughes Tool Company
    Inventor: Jay M. Eppink
  • Patent number: 4663981
    Abstract: Between a drive unit (not shown) and a driven unit (not shown) there is a gear train (2,7) which includes tuned bars (1, 10) which are so dimensioned that, in operation, the nodes in the torsion vibration to which the system is subject are situated in said tuned bars.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: May 12, 1987
    Inventors: Guy Louradour, Bernard Gironnet, Jean E. A. Redele
  • Patent number: 4659069
    Abstract: Flexurally stiff members having low torsional stiffness, high transverse shear resistance and high stability are disclosed. In several embodiments, each member includes a flexurally and torsionally stiff tapered elongate beam surrounded by an outer tube-like component of lower torsional stiffness and interconnected by an elastomeric medium which enables the tube-like component to twist relative to the beam while permitting some of the flexural and transverse loads applied to the tube-like component to be transferred to the beam. In several embodiments, the tube-like component includes a pair of interarranged corrugated open section members engaged by one or more stabilizers, including a shrunk fit tube of elastomeric material extending lengthwise between attachment fittings at opposite ends. End fittings for applying various loads to the members are also disclosed.
    Type: Grant
    Filed: March 20, 1985
    Date of Patent: April 21, 1987
    Inventor: Steven L. Odobasic