Nonmetallic Element Patents (Class 464/87)
  • Patent number: 10183691
    Abstract: A torque transmission joint transmits torque between a drive shaft and a driven shaft. The torque transmission joint includes: a coupling including: a first concave-convex portion which is provided on one of inner and outer circumferential surfaces thereof and is engaged with a drive-side concave-convex portion of the drive shaft with a gap; and a second concave-convex portion which is provided on the other of the inner and outer circumferential surfaces and is engaged with a driven-side concave-convex portion of the driven shaft with a gap; a drive-side elastic member which is provided between the drive shaft and the coupling to be torque-transmittable; and a driven-side elastic member which is provided between the coupling and the driven shaft to be torque-transmittable. A concave-convex shape of the first concave-convex portion and a concave-convex shape of the second concave-convex portion are different from each other.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: January 22, 2019
    Assignee: NSK LTD.
    Inventor: Toru Segawa
  • Patent number: 9702429
    Abstract: A torsional vibration absorber comprising a hub for attachment to a shaft and an oscillating ring. The oscillating ring is disposed concentrically with the hub and, together with the hub, delimits an annular gap. The hub and the oscillating ring are connected via connecting members made from an elastomeric material. The connecting members are offset in a circumferential direction and disposed in the annular gap. The connecting members include a bead-shaped middle portion, which is connected to the oscillating ring and to the hub via thin webs.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: July 11, 2017
    Assignee: TRELLEBORGVIBRACOUSTIC GMBH
    Inventors: Niklas Mueller, Juergen Reitz
  • Publication number: 20150041241
    Abstract: A shaft coupler that couples a worm shaft and an output shaft of an electric motor in an electric power steering device includes a joint on a motor side that is connected to the output shaft, a joint on a worm side that is connected to the worm shaft, and a coupling that is provided between the joints and that is for transmitting rotational torque of the electric motor to the worm shaft. The joint on the motor side and the joint on the worm side, each having a plurality of protrusion parts that extend in an axial direction, are arranged so that the protrusion parts are aligned alternately in a circumferential direction. The coupling is formed by a plurality of caps that are fitted to the protrusion parts of the joint on the motor side or the joint on the worm side.
    Type: Application
    Filed: February 4, 2013
    Publication date: February 12, 2015
    Inventors: Shinraku Yoshikawa, Tetsurou Shimizu, Katsumi Shimoda
  • Publication number: 20150024854
    Abstract: A device (10) for damping torsion between a clutch element (16) and a transmission shaft, comprising: an input washer (12A, 12B) that is rotationally integral with the clutch element (16); two output webs (18A, 18B) that are rotationally integral with the transmission shaft by means of a central hub (20); a pair of circumferentially acting elastic members (42) that are interposed circumferentially in series between the input washer (12A, 12B) and the output web (18A, 18B); a phase washer (44) that is interposed circumferentially between the two elastic members (42) of said pair.
    Type: Application
    Filed: February 12, 2013
    Publication date: January 22, 2015
    Inventors: Roel Verhoog, Maryse Soirant, Thomas David
  • Publication number: 20140295978
    Abstract: A non-split, unitary insert for a shear-type flexible shaft coupling is provided. The insert has an inner ring and an outer ring that is non-removably joined to and encircles the inner ring. The inner ring is constructed of a material having a durometer that is less than the durometer of the material forming the outer ring. In embodiments both of these materials are polyurethane. This arrangement permits slots of the inner ring to shear while retaining the integrity of insert by preventing destruction of the outer ring during shear of the slots. The outer ring may include one or more radial tabs that are received by corresponding one or more radial notches in the inner ring to prevent separation of the rings under load.
    Type: Application
    Filed: March 26, 2013
    Publication date: October 2, 2014
    Inventor: FREDERIK JAN LOUWERSHEIMER
  • Publication number: 20140228132
    Abstract: The invention relates to a compensating coupling for transmitting torques, comprising a sleeve-shaped main body (1) that extends in a longitudinal direction (z), which sleeve-shaped main body has several transverse slits (2) distributed over the circumference and in the longitudinal direction (z), wherein the transverse slits (2) each extend in the radial direction from an outer surface to an inner surface of the sleeve-shaped main body (1). According to the invention, the transverse slits (2) are filled with an elastomer (4).
    Type: Application
    Filed: October 4, 2012
    Publication date: August 14, 2014
    Inventor: Thomas Englert
  • Patent number: 8783940
    Abstract: It is intended to provide a kneading extruder which makes it possible to prevent breakage due to resonance regardless of the rotating speed of kneading screws.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: July 22, 2014
    Assignee: Kobe Steel, Ltd.
    Inventors: Koichi Honke, Koji Minagawa
  • Publication number: 20140024467
    Abstract: In a safety coupling for a motor vehicle for transmitting a driving torque between a machine shaft of an electric machine and a wheel drive shaft driving at least one wheel of a vehicle, torque is transmitted during disturbance free normal operation between the machine shaft and the wheel drive shaft via a releasable positive coupling. If a torque exceeding a limit value occurs, the releasable positive coupling is disengaged, and therefore an elastic coupling device at least briefly takes over the transmission of torque.
    Type: Application
    Filed: September 8, 2011
    Publication date: January 23, 2014
    Applicant: Audi AG
    Inventor: Karl-Heinz Meitinger
  • Publication number: 20130281218
    Abstract: The present disclosure relates to a vibration damper, in particular for a drive train of a motor vehicle, having a support body which is rotatable about an axis of rotation M, a damper mass which is coaxial with respect to the support body and which is arranged with a radial spacing to the support body, and a plurality of spring elements which connect the support body and the damper mass to one another. It is provided that the support body has axial travel limiting means which extend on the support body in the radial direction relative to the damper mass so as to limit a displacement of the damper mass in the axial direction relative to the support body.
    Type: Application
    Filed: September 6, 2011
    Publication date: October 24, 2013
    Applicant: SGF Suedeutsche Gelenkscheibenfabrik Gmbh & Co KG
    Inventors: Johann Loew, Franz Kobus
  • Publication number: 20130281219
    Abstract: The invention relates to a method for the production of a coupling segment (11) of a segmented, elastic coupling (10), wherein an elastomer body (2) is disposed between two metallic connection flanges (3, 4), and the elastomer body (2) is connected with the two connection flanges (3, 4) in material-fit manner, by means of vulcanization, to form a coupling body (1). In order to be able to produce such a segmented, elastic coupling (10) at the lowest possible costs, it is proposed, with the invention, that the coupling segment (11) is cut out from the coupling body (1) by means of water jet cutting, wherein the water jet cuts the elastomer body (2) and, at the same time, at least one of the two connection flanges (3, 4).
    Type: Application
    Filed: December 16, 2011
    Publication date: October 24, 2013
    Applicant: HACKFORTH GMBH
    Inventors: Torsten Kastner, Gunnar Goedecke
  • Patent number: 8029371
    Abstract: A torque coupling for a rotor head of a rotary-wing aircraft is configured for rotation with a mast and for causing rotation of an attached yoke. The coupling has trunnions that rotate with the mast and extend generally radially. Pad-bearing assemblies each have a central member coupled to one of the trunnions with a laminated spherical bearing and have laminated pad bearings affixed to opposing sides of the central member. The laminated bearings have alternating rigid and elastomeric layers. A bearing mount is affixed to each pad bearing and is connected to a yoke for rotating the yoke with the mast. The pad-bearing assemblies allow for relative motion between each central member and the associated trunnion and between each central member and the bearing mounts through elastic shear deformation, and this allows for gimballing of the attached yoke relative to the mast.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: October 4, 2011
    Assignee: Textron Innovations Inc.
    Inventors: Frank B. Stamps, Richard Rauber, David Popelka, Pat Tisdale, Tom Campbell, James Lee Braswell, Jr.
  • Publication number: 20110165950
    Abstract: The present invention relates to a rotary elastic coupling fitted with an inner ring and with an outer ring surrounding the inner ring around the periphery by forming an annular slit. An elastomer is provided in the annular slit, which is vulcanised or glued to the inner ring and to the outer ring and fills up the annular slit substantially or completely. The annular slit is meander-shaped around the periphery of the coupling so that radially outward protrusions of the inner ring undercut radially inward protrusions of the outer ring. Around the periphery of the coupling, a relief opening is provided in the elastomer on both sides of the protrusions of the inner ring and on both sides of the protrusions of the outer ring.
    Type: Application
    Filed: April 9, 2009
    Publication date: July 7, 2011
    Inventors: Markus K. Becker, Peter Frohs, Maik Marcinkowski, Michael Holzapfel, Michael Bachmann, Michael Jaros
  • Publication number: 20110105235
    Abstract: The invention relates to a Kelly bar arrangement having an inner bar and at least one outer bar, whereby the inner bar is arranged with respect to the at least one outer bar in an axially movable but rotationally fixed manner, and a spring means which is arranged in a lower area of the inner bar for cushioning an axial movement of the inner bar with respect to the at least one outer bar. In accordance with the invention provision is made for the spring means to be designed as an elastomer spring.
    Type: Application
    Filed: April 20, 2010
    Publication date: May 5, 2011
    Applicant: BAUER MASCHINEN GmbH
    Inventors: Karl Johannes Krollmann, Melchior Jais
  • Publication number: 20100151949
    Abstract: A vehicle driveline with a transmission having at least one motor/generator and an output shaft is provided. A driveshaft assembly is rotatably connected to the output shaft. The driveshaft assembly includes an isolator located between the transmission and at least a portion of the driveshaft assembly to electrically isolate the driveshaft assembly from the transmission.
    Type: Application
    Filed: December 12, 2008
    Publication date: June 17, 2010
    Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INC., AMERICAN AXLE & MANUFACTURING, INC.
    Inventors: Steven W. Creek, James M. Dimond, John Overholt, Kevin M. Ledford, Michael A. Voight
  • Patent number: 7707674
    Abstract: A hand-held motorized household cleaning apparatus that includes a housing, a battery located in the housing, a motor located in the housing and connected to the battery, an output drive shaft connected to the motor, a cleaning attachment coupled for movement with the output drive shaft and a liquid delivery system with a pressurized reservoir. A flexible adapter is also provided.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: May 4, 2010
    Assignee: Black & Decker Inc.
    Inventors: Todd A. Schonewille, Richard P. Rosa, Sean D. Wilkinson, Corey D. MacTavish, Jacob R. Prosper, James D. Marshall, Alex P. Sergyeyenko, Vincent P. Cooper, David M. Shaver, Patrick Marcil
  • Patent number: 7690277
    Abstract: A device for starting an internal combustion engine for hand-held tools, chainsaws, lawnmowers, trimmers and the like, includes a rotatable pulling medium roller which can be brought into functional connection with the crankshaft of the internal combustion engine in order to bring about a rotation of the crankshaft. The starting device has a simply configured functional connection between the crankshaft and the pulling medium roller and effectively reduces the force peaks reaching the pulling medium roller. To accomplish this, a deformation body having elastic deformation behaviour is arranged in the functional connection between the pulling medium roller and the crankshaft. The deformation body compensates for leading or lagging of the crankshaft with respect to the pulling medium roller.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: April 6, 2010
    Assignee: Dolmar GmbH
    Inventors: Christian Kellermann, Klemens Krahn
  • Publication number: 20090186707
    Abstract: A shaft coupling has an input element adapted to be rotationally driven about an axis, an output element rotatable about the axis adjacent and limitedly relative to the input element, and an intermediate element rotatable about the axis adjacent and limitedly relative to both the input element and the output element. A first coupling assembly with progressive resistance to torque is fixed between one of the input and output elements and the intermediate element. A second coupling assembly with linear resistance to torque is fixed between the other of the input and output elements and the intermediate element such that torque is transmitted between the input and output elements through the coupling elements in series with each other in a single stage.
    Type: Application
    Filed: March 6, 2009
    Publication date: July 23, 2009
    Inventor: Gerhard KIRSCHEY
  • Patent number: 7445555
    Abstract: A universal joint couples a drive shaft and a driven shaft and comprises two joint yokes, each joint yoke having bearing elements at axially opposite yoke arms. The two joint yokes are arranged radially at an angle of 90° in relation to each other to form an internal space. The universal joint also comprises fastening elements having an L-shaped cross section and pivotable in the axially opposite yoke arms of one of the joint yokes, a pin bearer pivotable in the other joint yoke, and an elastic coupling element connecting the fastening elements and the pin bearer.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: November 4, 2008
    Assignee: Ford Global Technologies, LLC
    Inventor: Norbert Gross
  • Publication number: 20080261705
    Abstract: The invention relates to an elastic joint member (10) with at least one set of loops (12) and at least two bushes (14), which extend transversely through the set of loops (12), collars (16), which are fastened to a respective bush end (22) in order to axially support the set of loops (12) on the relevant bush (14), and an elastomeric envelope (18), in which the set of loops (12) and the bushes (14) are embedded at least in part. Also according to the invention, the areas of the bushes (14) which are left free by the collars (16) and embedded in the envelope (18) are smooth, and the collars (16) are locked onto the associated bush (14) with a clearance which is such that the bush is rotatable within the collars, while these are connected in a fixed manner to the envelope (18).
    Type: Application
    Filed: January 16, 2006
    Publication date: October 23, 2008
    Inventors: Werner Wahling, Wolfgang Spaan
  • Patent number: 7387574
    Abstract: An adapter device and a production series of adapter devices for connecting an input shaft, e.g., a motor shaft of a motor, e.g., an electric motor, to a device to be driven, e.g., to a pinion of a gear unit, including an adapter shaft for the rotatably-fixed connection to the device to be driven, an intermediate piece engaged with the adapter shaft, and a sub-component that is engaged with the intermediate piece and is detachably connectable with form-locking to an input shaft, particularly a motor shaft. The sub-component includes a bore hole for accommodating the input shaft in the sub-component, and the sub-component has at least three claws for forming the coupling. The adapter shaft, at its second end, thus at the end facing the intermediate piece, has at least three claws for forming a coupling. The intermediate piece is provided between the claws of the sub-component and the claws of the adapter shaft.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: June 17, 2008
    Assignee: Sew-Eurodrive GmbH & Co.
    Inventors: Heinrich Zimmermann, Roland Denefleh, Günter Oberländer
  • Publication number: 20080009354
    Abstract: A coupling sleeve for use in a sleeve-type, flexible, shaft-coupling device, comprising: a generally annular body portion having an inner periphery and an outer periphery; and one or more axially extending, polymeric or elastomeric teeth on at least one of said periphery of said body portion; wherein said body portion comprises a rigid support band having a rigid, axially extending fin protruding radially into at least one of said one or more teeth. The coupling sleeve has a cross sectional area comprising a polymeric portion and a rigid band portion, and said rigid band portion occupies the minor portion of said cross section relative to said polymeric portion. Torque applied to the teeth of the coupling sleeve during use is resisted by the fins and the tooth material is thus placed in compression. Another aspect of the invention is to provide a coupling device comprising the coupling sleeve and at least one end piece coupled to said sleeve.
    Type: Application
    Filed: July 5, 2006
    Publication date: January 10, 2008
    Inventors: Yahya Hodjat, Keming Liu, Lin Zhu, Marc Cadarette
  • Patent number: 6953399
    Abstract: An elastic shaft coupling with high torsional elasticity having segments formed by steel sheet segment plates vulcanized to an elastomeric body and in which blocking elements bridge the radial gaps of the segments of each coupling half so as to brace the plate segments against axial deformation. All of the elastomeric bodies are vulcanized to the segments or to rings from which segments are divided in a common vulcanization procedure.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: October 11, 2005
    Assignee: Centa-Antriebe Kirschey GmbH
    Inventor: Gerhard Kirschey
  • Patent number: 6908284
    Abstract: The invention is based on an axial fan with a hub region (4, 27) for connecting the axial fan with a driven shaft (20) of an electrical drive (21), whereby the axial fan is statically balanced by means of a balancing weight (26). A flexurally soft connection is formed in the hub region (4, 27) between the axial fan (1) and the driven shaft (20) of an electrical drive (21).
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: June 21, 2005
    Assignee: Robert Bosch GmbH
    Inventor: Ludger Adrian
  • Patent number: 6893350
    Abstract: A torsionally-compliant universal joint includes a cruciform having trunnion posts partially encapsulated within a body. The body is formed from an elastomeric material. A bearing cup assembly is rotatably coupled to one of the trunnion posts. The bearing cup assembly is coupled to a yoke.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: May 17, 2005
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: Marc. M. Menosky, Salvatore N. Grupido
  • Patent number: 6705181
    Abstract: A torque transmission apparatus absorbs torque fluctuations (vibrations) while limiting the size of the outside dimensions of a pulley. Elastomeric dampers and pendulum type vibration-absorbing mechanisms are located between an outer tube and an inner tube of a pulley body.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: March 16, 2004
    Assignees: Nippon Soken, Inc., Denso Corporation
    Inventors: Yasuo Tabuchi, Junichi Ohguchi, Naoki Hakamada
  • Patent number: 6648763
    Abstract: A flexible coupling having a generally cylindrical flexible element with a plurality of generally radial element teeth that are engaged by a plurality of generally radial hub teeth that penetrate generally radial element tooth faces on the element teeth, with the hub teeth arranged around generally radial hub faces of generally cylindrical shaft hubs and means for reducing axial loading of drive shafts attached to the hubs under load.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: November 18, 2003
    Assignee: The Falk Corporation
    Inventors: Sean T. Ash, Glenn C. Pokrandt
  • Patent number: 6561912
    Abstract: A shaft, in particular a drive shaft, for transferring torques, includes a basic member made of an elastic first material, and connecting pieces shaped at their ends for being received by the basic member and prevented by positive engagement from rotating and displacing axially relative to the basic member. The connecting pieces are made of a second material which is inelastic or less-elastic than the first material or. The first and second materials are plastics which are crosslinked with one another at interfaces of the basic member and the connecting parts. The shaft is reliably functional while having a compact design.
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: May 13, 2003
    Assignee: DaimlerChrysler AG
    Inventor: Manfred Link
  • Patent number: 6543955
    Abstract: An elastomeric joint (100) that comprises a wing plate (102) including a base plate (104) generally extending along a first axis and generally perpendicular to a second axis is provided. The wing plate further includes a mutually opposite first and second bushing-receiving bores (120) co-axially aligned relative to a third axis perpendicular to said first and second axes. A plurality of elastomeric shear pads (106) is affixed on mutually opposite sides of the base plate. The plurality of shear pads is stacked generally perpendicular to the second axis. Top and bottom elastomeric bushings (122) are received by said respective bushing-receiving bores. Each elastomeric bushing comprises a plurality of torsion pads (124) and includes a respective pin-receiving bore(128).
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: April 8, 2003
    Assignee: General Electric Company
    Inventors: Jerry Lee Conaway, William Anthony Kurtzhals
  • Patent number: 6471436
    Abstract: A drive connector for elastomerically coupling a drive shaft to a driven shaft. An elastomeric coupling includes openings on opposite ends that are generally “D”-shaped forming an interference fit with correspondingly shaped ends of the drive shaft and the driven shaft. A web extends transversely within the interior of the elastomeric coupling, limiting the distance that the drive shaft and driven shaft are inserted within the openings of the coupling. The coupling includes a rib that runs longitudinally along its outer length. A sleeve having a groove corresponding in size and shape to the rib is slipped over the coupling and is connected to the driven shaft. The sleeve includes a rigid interior element that is overmolded with an elastomeric material. A cam bearing is fitted over a cam surface on the sleeve and provides a force in one direction, urging a plunger to displace an elastomeric membrane in a pumping cassette, forcing medicinal fluid to flow through the pumping cassette.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: October 29, 2002
    Assignee: Abbott Laboratories
    Inventors: John D. Gjata, Michael W. Lawless, Andrew J. Scherer, Peter A. Soberon, Stephanie R. Squarcia
  • Publication number: 20020142849
    Abstract: A flexible coupling having a generally cylindrical flexible element with a plurality of generally radial element teeth that are engaged by a plurality of generally radial hub teeth that penetrate generally radial element tooth faces on the element teeth, with the hub teeth arranged around generally radial hub faces of generally cylindrical shaft hubs and means for reducing axial loading of drive shafts attached to the hubs under load.
    Type: Application
    Filed: September 13, 2001
    Publication date: October 3, 2002
    Inventors: Sean T. Ash, Glenn C. Pokrandt
  • Patent number: 6449798
    Abstract: A multi-function apparatus for controlling various functions of a liftgate of an automotive vehicle. The apparatus includes an elastomeric member which is operably disposed in connection with a gear which imparts a driving force to a drive shaft of a window wiper member. The elastomeric member, in one embodiment, is a coiled spring which allows movement between the drive shaft and the gear driving the drive shaft in the event the wiper becomes frozen to the window of the vehicle or otherwise immovable. In this manner various other functions can be carried out by the apparatus regardless if the wiper becomes temporarily immobilized.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: September 17, 2002
    Assignee: Lear Corporation
    Inventors: Evgeny I. Rivin, Victor R. Fey
  • Publication number: 20020052242
    Abstract: A hole is formed in a damper rubber, where by when a compressive load is small, pillar portions undergo a flexural deformation so as to result in buckling deformation. On the other hand, when the compressive load becomes large, the hole collapses and the damper rubber under goes a compressive deformation so as to collapse itself. Thus, since the damper rubber has a non-linear characteristic such that an elastic modulus thereof at an amount of deformation exceeding a predetermined amount is larger than that at an amount of deformation less than the predetermined amount, the transmission of a large torque can be implemented while absorbing a torque fluctuation sufficiently.
    Type: Application
    Filed: October 16, 2001
    Publication date: May 2, 2002
    Inventors: Yasuo Tabuchi, Junichi Ohguchi, Makoto Ito, Manabu Saiki, Kiyoshi Kurohata
  • Patent number: 6361443
    Abstract: The invention relates to a shaft coupling (1) comprising at least one elastomer transmission element (2). In order to meet continuously increasing requirements in terms of dynamic load capacity and long service life, and with a view to providing special protection against oxidation-caused aging in hostile environments such as high temperatures, the outer surface of the transmission element (2) is provided at least partially with an anti-aging, airtight covering (3).
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: March 26, 2002
    Assignee: Hackforth GmbH & Co.
    Inventors: Jurgen Walter, Ulrich Falz
  • Publication number: 20020016207
    Abstract: A torsionally elastic coupling (1) is equipped with a plurality of radially deflectable springs (4) distributed over the periphery for transmission of torque between a hub (2) and an outer crown (3). In order to achieve simple torsionally elastic coupling with axial, radial and angular displacement capacity and having a vibration-damping effect, the springs (4) comprise a fiber-reinforced body (9) bent at least once about an axis of curvature (K) parallel to the axis of rotation (D) of the coupling and connecting elements (11, 12) for attaching the hub or outer crown, in which at least one longitudinally extending elastomer layer (13) is embedded between the connecting elements (11, 12) in the fiber-reinforced body (9).
    Type: Application
    Filed: June 14, 2001
    Publication date: February 7, 2002
    Inventor: Matthias Geislinger
  • Patent number: 6340333
    Abstract: Torque transmitting, molded flexible shaft assemblies having two rigid, tubular, shell-like sections that are filled and linked together by a flexible material. The two sections are placed in a mold such that they are separated by an elongated cavity. A flexible-when-hardened moldable material such as polyurethane then fills the mold such that the two sections and the elongated cavity are filled by the moldable material.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: January 22, 2002
    Assignee: Xerox Corporation
    Inventor: Robert D. Russell
  • Patent number: 6287203
    Abstract: A method and structure for coupling to a step motor shaft is characterized by providing a predetermined back-lash distance defined between the step motor shaft and a key, thereby to instantly reach the desired speed for driving a load. Accordingly, a shaft coupling device is provided to connect to a rotatable load. The shaft coupling device has a key which maintains a back-lash distance defined between a step motor shaft and the key. Eventually, when the step motor shaft is not driving the load, they are separated. When the step motor shaft is driven by the step motor, it self-spins in a first direction and travels through a distance so as to form a predetermined back-lash distance between the key. As soon as the back-lash distance is formed, the step motor shaft reverses its rotation direction and then starts to travel through the predetermined back-lash distance to drive the load. The speed of the step motor shaft soon increases as it rotates in a second direction and approaches the load.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: September 11, 2001
    Assignee: Mustek Systems Inc.
    Inventors: Bill Chen, Emmet Chen, Te-Chih Chang
  • Patent number: 6162125
    Abstract: An electro-hydraulic gear pump power pack [10], including a gear pump [12] and a motor [16], are secured together to form a single assembly. The gear pump [12] has a gear drive [14] that is in rotational communication with a drive shaft [18] extending from the motor [16]. An insert coupling device [20] is constructed of a plastic material and is slip fit onto the drive shaft [18] to dampen vibrations and fluctuations between the shafts [14, 18] and thereby minimize fluid borne noise in the pump [12].
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: December 19, 2000
    Assignee: Ford Global Technologies
    Inventors: James Richard Robertson, Sunil Palakodati
  • Patent number: 6117016
    Abstract: A transmission coupling assembly for absorbing axial and/or angular displacement between an internal combustion engine and a downstream gear train comprises a resilient vibration damper (3;24) secured to the flywheel (1;26). A coupling member (4;23) secured to the vibration damper is rotationally coupled to a coupling shaft (7;21) by means of interlocking splines, the splines (4a) of the coupling member being substantially straight and the splines (5a) of the coupling shaft being crowned or spherically curved. At the other end of the coupling shaft (7;21) a similar splined connection is made to the input shaft (8) of the downstream gear train. Lubrication is provided at the splined connection between the coupling shaft and the input shaft of the gear train, with a Z-cross section seal extending between the coupling shaft and the gearbox casing to prevent leakage of lubricant fluid.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: September 12, 2000
    Assignee: AGCO GmbH & Co.
    Inventors: Hans-Peter Nett, Herbert Leonhart, Robert Honzek
  • Patent number: 6113497
    Abstract: A coupling assembly for coupling the flywheel of an internal combustion engine to a U-joint based driveline. The coupling member absorbs damaging torque and vibrational energy while maintaining driveline alignment and providing safety through securing of frontplate (1) to alignment safety bearing (14) to backplate (11) while transmitting rotational drive force.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: September 5, 2000
    Inventor: W. Hershel Qualls
  • Patent number: 6074302
    Abstract: A torsion isolator (34) for transmitting torque and dampening torsionals in a driveline. The isolator includes a composite c-shaped spring (48) disposed in an annular chamber (44) of a housing (38,40) filled with torque converter fluid. The spring transmits driveline torque and attenuates torsionals. The spring also functions as a fluid displacement piston by dividing the chamber into radially inner and outer volumes (44a,44b) which vary inversely in volume in response to torque changes flexing the spring. Rapid flexing of the spring increases the fluid pressure in the decreasing volume and thereby dampens or reduces the rate of spring flexing or rebound.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: June 13, 2000
    Assignee: Eaton Corporation
    Inventor: Dale A. Stretch
  • Patent number: 6068555
    Abstract: A flexible disc is arranged between first and second flanges each designed to be secured to a shaft, the flexible disc being alternately fixed at angular spacings to one each of the flanges. A torsional vibration suppressor is associated with one of the two flanges and has a suppressor collar integrally formed with the flange, a gyrating mass, and a rubber spring suspension system which is secured by vulcanization to the suppressor collar and the gyrating mass. A centering device having a centering collar formed integrally with the flange, a centering body rigidly connected to the other flange, and a rubber spring suspension system secured by vulcanization to the centering collar, is provided for mutually centering the two shafts. This obviates the need for expensive fits or matches and facilitates the assembly of the shaft coupling.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: May 30, 2000
    Assignee: SGF Suddeutsche Gelenkscheibenfabrik GmbH & Co. KG
    Inventors: Rainer Andra, Wilfried Schneider
  • Patent number: 6010408
    Abstract: A torsion isolator (34) for transmitting torque and dampening torsionals in a driveline. The isolator includes a composite c-shaped spring (48) disposed in an annular chamber (44) of a housing (38,40) filled with torque converter fluid. The spring transmits driveline torque and attenuates torsionals. The spring also functions as a fluid displacement piston by dividing the chamber into radially inner and outer volumes (44a,44b) which vary inversely in volume in response to torque changes flexing the spring. Rapid flexing of the spring increases the fluid pressure in the decreasing volume and thereby dampens or reduces the rate of spring flexing or rebound.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: January 4, 2000
    Assignee: Eaton Corporation
    Inventors: Robert S. Mueller, David P. Godlew
  • Patent number: 5951400
    Abstract: A constant velocity flexible coupling for direct drive to the wheels of a low speed light duty wheeled vehicle or 4-wheel drive steer lawn tractor having discs which flexibly couple a drive shaft to a wheel flange.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: September 14, 1999
    Inventor: David W. Giere
  • Patent number: 5862706
    Abstract: A shaft deflection controller includes an input driveshaft adapted for inputting power from an engine. The input driveshaft includes an axis of rotation and a spur pinion at an end of the input driveshaft. The axis of rotation of the input driveshaft changes, relative to a frame, with deflections of the input driveshaft. Two face gears are adapted for meshing with the spur pinion of the input driveshaft. A flexible shaft stabilizing mount includes an inner sleeve portion and a mounting flange. The inner sleeve portion includes a base portion connecting the inner sleeve portion to the mounting flange and a plurality of cage spring members. The mounting flange is connected to and concentric with the inner sleeve portion. The flexible shaft stabilizing mount controls the deflection of the input driveshaft by applying forces onto the input driveshaft, which tend to resist changes in the alignment of the axis of rotation of the input driveshaft. The flexible shaft stabilizing mount is connected to a rigid frame.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: January 26, 1999
    Assignee: McDonnell Douglas Helicopter Company
    Inventors: Yih-Jen D. Chen, Gregory F. Heath, Vijay J. Sheth, Murugappan Meyyappa
  • Patent number: 5816114
    Abstract: A method of operating a flywheel (10) includes the provision of a central shaft (12) defining an axis of rotation; providing a disk-shaped hub (22) joining drivingly with both the shaft and with a rim portion (34); and which hub portion has a shape when the flywheel is at rest which is of a shallow dihedral geometry. That is, the hub is cone-shaped when the flywheel is at rest. As the rotational speed of the flywheel is increased from the at-rest speed toward and then to a design operating speed for the flywheel, this hub progressively flattens out until it becomes flat and extends radially between the shaft and the hub at the design speed for the flywheel. Thus, the flattening of the hub with increasing rotational speed for the flywheel moves the rim portion axially in response to centrifugal force.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: October 6, 1998
    Assignee: Hughes Electronics Corporation
    Inventors: Daniel J. Gregoire, Robin J. Harvey
  • Patent number: 5795232
    Abstract: A drive assembly coupler to transfer torque from a motor shaft. The coupler includes a body having a first end, a second opposed end, and an axial opening through the body extending between the ends. A first pair of opposed channels is provided in the body, each channel parallel to the other and parallel to the opening. A second pair of opposed channels is provided in the body, each channel parallel to the other and parallel to the opening. A first U-shaped insert has a threaded opening receivable in the first end and has a first pair of extending legs receivable in the first channels. A second U-shaped insert has a threaded opening receivable in the second end and has a second pair of extending legs receivable in the second channels.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: August 18, 1998
    Assignee: R. L. Hudson & Company
    Inventors: Carl R. Sitzberger, Richard L. Hudson, Thomas W. Boyer
  • Patent number: 5761850
    Abstract: A garage door operator having reduced noise output during operation includes a head unit having a housing. A motor mount is connected to the housing to support an electric motor. A vibration damper is interposed between the motor mount and the electric motor to reduce noise radiated from the housing when the electric motor is energized to drive a garage door up and down.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: June 9, 1998
    Assignee: The Chamberlain Group, Inc.
    Inventors: Roger W. Lhotak, Kenneth J. Dombrowski
  • Patent number: 5741187
    Abstract: A flexible shaft coupling in which the torque transmission takes place by way of elastomer shackles between the two shafts to be coupled. The coupling components in the form of separate anchoring plates are all arranged in a single radial plane of the coupling, whereas the radially outward-pointing elastomer shackles are mounted to enclose the coupling. For predetermined torques to be transmitted, this design allows minimal outside dimensions of the flexible shaft coupling, as a result of which these couplings are especially applicable to wheel driveshafts of motor vehicles.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: April 21, 1998
    Assignee: Kurt Fiedler
    Inventors: Franz Josef Wolf, Kurt Fiedler
  • Patent number: 5595541
    Abstract: A flexible coupling for two shafts rotatable generally about the same axis and having juxtaposed ends has respective end fittings fixed on the shaft ends and each having a radially outwardly directed outer surface, an elastically compressible sleeve having an inner surface engaging both outer surfaces and a radially outwardly directed outer surface and axially oppositely directed end surfaces, and rigid structure including at least one ring engaging the outer and end surfaces of the sleeve. A system is provided for pressing the structure against the outer and end surfaces of the sleeve for pressing the inner sleeve surface against the outer fitting surfaces with a variable force.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: January 21, 1997
    Assignee: P.I.V. S.A.
    Inventor: Jean Ducugnon
  • Patent number: 5577963
    Abstract: A torsion isolator (34) for transmitting torque and dampening torsionals in a driveline. The isolator includes a composite c-shaped spring (48) disposed in an annular chamber (44) of a housing (38,40) filled with torque converter fluid. The spring transmits driveline torque and attenuates torsionals. The spring also functions as a fluid displacement piston by dividing the chamber into radially inner and outer volumes (44a,44b) which vary inversely in volume in response to torque changes flexing the spring. Rapid flexing of the spring increases the fluid pressure in the decreasing volume and thereby dampens or reduces the rate of spring flexing or rebound.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: November 26, 1996
    Assignee: Eaton Corporation
    Inventor: Dale A. Stretch