Grooved Surfaces Patents (Class 192/113.36)
  • Patent number: 10260570
    Abstract: A friction plate has a plurality of friction material segments circularly fixed on an annular core plate, wherein each of the friction material segments includes an oil groove having an opening that opens in the direction of an outer circumferential edge of the friction plate and an end portion that ends between an inner circumferential edge and the outer circumferential edge, oil passages in communication in the direction of the inner and the outer circumferential edges of the friction plate are provided among the friction material segments, and at least some of the oil passages have a first shape, the width of which in a circumferential direction decreases from the inner circumferential edge of the friction plate toward the outer circumferential edge thereof.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: April 16, 2019
    Assignee: NSK-WARNER K.K.
    Inventors: Hideaki Takabayashi, Yousuke Ikeda, Masanori Okada, Masahiro Kobayashi, Osamu Tanaka, Fumimasa Muramatsu, Yoshinori Watanabe, Masahiro Yamada, Tsutomu Kawai, Kazuyuki Fujita
  • Patent number: 10006498
    Abstract: A work vehicle drive assembly has a bimodal clutch module that includes a pressure plate, a module housing containing first and second cavities located on opposing sides of the pressure plate, and an actuator. The actuator is controllable to move the pressure plate along a working axis of the clutch module. A clutch member is installed in a selected one of the first and second cavities. The clutch member is (i) engaged by movement of the pressure plate along the working axis in a first direction when the clutch member is installed in the first cavity and (ii) disengaged by movement of the pressure plate along the working axis in the first direction when the clutch member is installed in the second cavity.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: June 26, 2018
    Inventors: Steven R. Fliearman, Randall L. Long, William G. Detrick
  • Patent number: 9890818
    Abstract: A clutch and/or brake module has a heat sink which is attached to a transmission housing for the purpose of discharging heat. The brake module further has a brake disc, which is connected to a rotational member formed by a shaft (schematically indicated by a center line). The brake disc is provided on one side with a lining and faces with this side towards the heat sink. The brake is a dry brake and is not lubricated. The brake module further has an actuation system (cylinder with piston movable therein, schematically indicated by an arrow) which can exert an axial pressing force directly on the brake disc. The brake disc is located axially between the heat sink and the actuation system. The cooling plate is secured to a transmission housing, a part of which is schematically shown.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: February 13, 2018
    Assignee: DTI Group, B.V.
    Inventors: Roël Marie van Druten, Bas Gerard Vroemen, Alexander Franciscus Anita Serrarens
  • Patent number: 9879768
    Abstract: A multi-electric motor driven gearbox assembly includes a main gear coupled to at least two pinion gears. Each pinion gear is connected via an associated secondary shaft to corresponding secondary shaft pulleys that are adapted to be driven by an electric motor. A one-way bearing is coupled to each pinion gear and disposed so as to allow the pinion gear to decouple relative to the secondary shaft pulley when the associated electric motor fails and to do so without creating drag on the main gear during decoupling.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: January 30, 2018
    Assignee: VELOS ROTORS LLC
    Inventor: Aristeidis Kolokythas
  • Patent number: 9759302
    Abstract: A transmission includes a case having a front support that defines a reservoir, and a first passageway in fluid communication with the reservoir. The transmission also includes a torque converter having a bypass clutch having a piston disposed between a balance chamber and an apply chamber. The clutch fixes the turbine to the impeller in response to fluid pressure in the apply chamber exceeding fluid pressure in the balance chamber. The transmission further includes a hollow stator shaft fixed to the front support and a turbine shaft driveably connected to the turbine. The turbine shaft extends through the stator shaft and defines a second passageway in fluid communication with the first passageway and the balance chamber. The reservoir, the first passageway, the second passageway, and the balance chamber are arranged such that fluid travels from the reservoir to the balance chamber when the piston is de-stroked.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: September 12, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Gregory Daniel Goleski, Steven Anatole Frait, Bradley Ronald Heuver
  • Patent number: 9732807
    Abstract: Power transmission systems including clutch arrangements and systems are adapted to be used in marine and other environments. Such power transmission systems may include clutch arrangements that provide more effective power transmission capabilities as well as greater durability and longer life. Slipping clutch arrangements may effectively vary the output speed of a clutch arrangement from the speed of the engine or other driver as desired for the particular application. Various clutch arrangements also provide for greater flexibility and drive options, lighter weight, and diverse types of capabilities.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: August 15, 2017
    Assignee: LOGAN CLUTCH CORPORATION
    Inventors: W. Andrew Logan, Scott W. Stevens, Michael S. Vining, Robert S. Tekesky, Stefan Vinca
  • Patent number: 9714683
    Abstract: A friction plate is formed by annularly fixing a plurality of friction material segments to a substantially annular core plate, and a minute groove is formed on a surface of the friction material segment.
    Type: Grant
    Filed: July 18, 2015
    Date of Patent: July 25, 2017
    Assignee: NSK-WARNER K.K.
    Inventors: Masato Kobayashi, Tomoyuki Miyazaki, Shinichi Natsumeda
  • Patent number: 9593713
    Abstract: A thrust washer is provided. The thrust washer includes a wet friction material and a phenolic resin layer coating an outer surface of the wet friction material. A torque converter comprising the thrust washer is also provided. A method of forming a thrust washer is further provided. The method includes providing a layer of phenolic resin on an outer surface of a wet friction material.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: March 14, 2017
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Rashid Farahati, Patrick Lindemann
  • Patent number: 9500234
    Abstract: A fastening friction plate is wedged between the fastening surfaces of two fastening members in order to increase the fastening force between them. The fastening friction plate has a friction plate main body of a fixed thickness, and engaging protuberances having an approximately truncated cone shape formed on the both surfaces of the friction plate main body at a fixed pitch. The friction plate main body and the engaging protuberances are integrally formed by photo-etching into the both surfaces of a steel plate material having a fixed thickness. The hardness of the fastening friction plate is equal to or greater than that of the fastening surfaces of the fastening members.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: November 22, 2016
    Assignee: HARMONIC DRIVE SYSTEMS INC.
    Inventors: Masaru Kobayashi, Tatsuro Hoshina
  • Patent number: 9482342
    Abstract: A piston assembly, including: a piston for a clutch in a torque converter including: first and second radial surfaces; and a radially inner-most end connecting the first and second radial surfaces. The piston assembly includes a radially displaceable bushing assembly: arranged to engage an input shaft for a transmission and form a first seal against the input shaft; including a first radial wall disposed parallel to the first radial surface and forming a second seal against the first radial surface; and including a second wall facing the second radial surface. The bushing assembly is radially displaceable with respect to the piston while maintaining the first seal between the first radial wall and the first radial surface and the second seal between the bushing assembly and the input shaft.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: November 1, 2016
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Markus Steinberger
  • Patent number: 9458921
    Abstract: A gearbox for a motor vehicle including a plurality of forward gear ratios and at least one reverse gear ratio. The gearbox including an electro-hydraulic actuation unit configured for selection and engagement of the gear ratios. The gearbox comprises a first hydraulic pump and a second hydraulic pump. The first hydraulic pump is driven in rotation by an electric motor and is configured for supplying hydraulic fluid taken in from a first intake environment to said electro-hydraulic actuation unit. The second hydraulic pump is driven in rotation by an engine of said motor vehicle and is configured for supplying hydraulic fluid taken in from a second intake environment to said gearbox, for lubrication thereof, and to said first intake environment.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: October 4, 2016
    Assignee: C.R.F. SOCIETA CONSORTILE PER AZIONI
    Inventors: Marco Garabello, Andrea Piazza
  • Patent number: 9327719
    Abstract: A method for braking a vehicle driving forward towards stop. The vehicle has a propulsion system including a combustion engine with an output shaft (2a), a gearbox (3) with an input shaft (3a), an electric machine (9) comprising a stator and a rotor, and a planetary gear comprising a sun gear (10), a ring gear (11) and a planet wheel carrier (12). When braking the vehicle, a reverse gear of the gearbox is engaged and the electric machine is controlled to apply brake torque requested to the input shaft of the gearbox.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: May 3, 2016
    Assignee: SCANIA CV AB
    Inventors: Niklas Pettersson, Mikael Bergquist, Johan Lindström, Anders Kjell, Mathias Björkman
  • Patent number: 9291211
    Abstract: In a wet friction material, a plurality of segment pieces is disposed at both sides of inter-segment grooves. The segment pieces are composed of first segment pieces and second segment pieces. The first segment piece has at least two inner peripheral recesses formed on an inner periphery thereof and at least two outer peripheral recesses formed on an outer periphery thereof. The outer periphery of the first segment piece has a short dimension. The second segment piece has at least two inner peripheral recesses formed on an inner periphery thereof and at least two outer peripheral recesses formed on an outer periphery thereof. The outer periphery of the second segment piece has a long dimension.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: March 22, 2016
    Assignee: AISIN KAKO KABUSHIKI KAISHA
    Inventor: Hiroki Okamura
  • Patent number: 9273615
    Abstract: When an internal combustion engine that is provided in a work machine and that serves as a power source for the work machine is controlled, the following lines are used: a first equal throttle line which is defined to correspond to a case where an amount of fuel injection for the internal combustion engine is maximum where the rotation speed of the internal combustion engine is the same and so that an output of the internal combustion engine becomes constant, a second equal throttle line which is defined to correspond to a case where the amount of fuel injection for the internal combustion engine is zero where the rotation speed of the internal combustion engine is the same and so that the torque decreases with increase of the rotation speed, and a third equal throttle line which is obtained from the first equal throttle line and the second equal throttle line.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: March 1, 2016
    Assignee: Komatsu Ltd.
    Inventor: Kentaro Murakami
  • Patent number: 9103385
    Abstract: To be able to promote discharge of lubricating oil in a disengaged state while maintaining a large lining area to such an extent that it does not affect torque transmission capacity, heat resistance, and peeling resistance thereby to obtain an excellent effect to reduce a drag torque in a wide range of relative rotation speeds. In a segment friction material 1A as a wet friction material, drag torque reducing grooves 5A are provided only on top surfaces of part of segment pieces 3A among thirty pieces of segment pieces 3, 3A. A series of drag torque reducing grooves 5A extend over five segment pieces 3A along a direction almost at right angles to a straight line connecting a center point 5Aa thereof and a center O of a circumference. The series of drag torque reducing grooves 5A are provided at three places on the circumference. Thereby, discharge of ATF is promoted without reducing a lining area and an oil film is formed on the top surface of the segment piece 3A.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: August 11, 2015
    Assignee: AISIN KAKO KABUSHIKI KAISHA
    Inventors: Yuko Higashijima, Masato Okada, Masato Suzuki
  • Patent number: 9091305
    Abstract: A clutch assembly with a rotatable clutch hub which is connected rotationally fixedly to several inner plates which may be brought into friction connection with outer plates of an associated clutch basket and form a plate pack. The clutch hub has at least one bore which allows a throughflow of a fluid from the interior of the clutch to the plates, and an oil conduction device attached to the clutch hub at the at least one bore.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: July 28, 2015
    Assignee: MAGNA Powertrain AG
    Inventors: Andreas Penz, Wolfgang Schweiger, Werner Schöfmann
  • Patent number: 9027728
    Abstract: A segment-type friction material comprises segment pieces each having a supply passage formed thereon to supply lubricating oil to a surface of each of the segment pieces. The segment-type friction material further comprises oil grooves each having an outer peripheral opening portion extended in a curved shape or a linear shape. Thereby, lubricating oil is sufficiently supplied to the surface of each of the segment pieces from an outer peripheral side thereof or an inner peripheral side thereof and a clearance between the segment-type friction material and its associated separator plate is assured. Moreover, a space for the lubricating oil to flow through an outer periphery is sufficiently assured and a drag torque is reduced.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: May 12, 2015
    Assignee: Aisin Kako Kabushiki Kaisha
    Inventors: Hiroaki Hiramatsu, Yoshihito Fujimaki
  • Patent number: 8939269
    Abstract: A friction plate for a clutch assembly includes a core plate and a plurality of friction segments made of a friction material. A plurality of grooves are disposed between said plurality of friction segments. Each segment has tapered sides so that the grooves have a first width adjacent the outer diameter of the core plate and a smaller second width smaller adjacent the inner diameter of the core plate. This tapered groove structure directs oil from the outside the clutch assembly to the inside to improve cooling efficiency.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: January 27, 2015
    Assignee: Eaton Corporation
    Inventors: Bulent Chavdar, Scott T. Roth
  • Patent number: 8752680
    Abstract: A braking system includes at least one rotating disc, and at least one brake disc having a front face and a rear face. The brake disc has at least four inner chambers disposed therein. Each of the at least four inner chambers has a liquid inlet and a liquid outlet and defines a liquid pathway. At least one biasing element is configured to move the front face of the at least one brake disc into contact with the at least one rotating disc.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: June 17, 2014
    Assignee: Eaton Corporation
    Inventors: Thaveesak Boonpongmanee, Daniel Wepplo, Donald Danko
  • Patent number: 8746427
    Abstract: The invention relates to a friction lamella (1) comprising a disk-shaped carrier element (2) having a first surface (3) and a second surface (4) opposite thereto, a first friction lining (5) being situated on the first surface (3) and a second friction lining (6) being situated on the second surface (4), which are formed from a composite material, comprising a resin and a fibrous material, and grooves (9, 10) being situated in the first and in the second friction linings (5, 6), which divide the friction linings (5, 6) into segments (7, 8) at least in surface-proximal areas. The segments (7) of the first friction lining (5) are implemented offset by a defined offset angle (11) to the segments (8) of the second friction lining (6). Furthermore, the invention relates to a method and a device for producing the friction lamella and the use of the friction lamella.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: June 10, 2014
    Assignee: Miba Frictec GmbH
    Inventors: Volker Foege, Gerhard Hartner
  • Patent number: 8727092
    Abstract: A segment-type friction material is composed of segment pieces. An outer circumference of the segment piece is away from an outer circumference of a core plate. A setback amount is about 2 mm. Then, a gap between the outer circumference of the segment piece and an inner peripheral part of an automatic transmission case becomes large. Thus, there is generated a part at which a gap between the segment pieces and a separator plate becomes large in a disengaged state.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: May 20, 2014
    Assignee: Aisin Kako Kabushiki Kaisha
    Inventors: Kazunari Asai, Masato Suzuki
  • Patent number: 8714333
    Abstract: The present invention provides a friction plate having a friction surface formed by sticking an annular friction material to a substantially annular core plate and wherein the friction surface is provided with a first oil groove having an opening portion opened to an inner peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and an outer peripheral edge, and a second oil groove having an opening portion opened to the outer peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and the outer peripheral edge.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: May 6, 2014
    Assignee: NSK-Warner K.K.
    Inventors: Tomoyuki Miyazaki, Masahiro Kobayashi
  • Patent number: 8714331
    Abstract: The present invention provides a starting clutch disposed between a transmission and an engine and having a wet type multi-plate clutch for transmitting a power, in which the wet type multi-plate clutch includes a plurality of friction plates housed for an axial sliding movement, a clutch drum for housing the friction plates, and a piston for urging a radial central region or therearound of the friction plate to engage the friction plates, and oil which has lubricated the wet type multi-plate clutch is temporarily trapped within the clutch drum and then is discharged.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: May 6, 2014
    Assignee: NSK-Warner K.K.
    Inventors: Tomoyuki Miyazaki, Shun Kitahara, Manabu Sawayanagi, Masaki Sakai, Yosuke Ikeda
  • Patent number: 8701854
    Abstract: An automotive car and truck transmission clutch module friction plate and a method of manufacture thereof is provided wherein the friction plate is fabricated from a polymeric material, which is less expensive and lighter than comparable steel friction plates.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: April 22, 2014
    Assignee: BorgWarner Inc.
    Inventor: Michael J. Roche
  • Patent number: 8662275
    Abstract: A synchronizing ring for a synchronizing device of a motor vehicle gearing with a ring body. The ring body has a plurality of recesses, and frictional elements are arranged in the recesses.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: March 4, 2014
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Thomas Karais, Josef Schwuger, Marcus Spoerl
  • Patent number: 8657088
    Abstract: Disclosed is a lock-up clutch operative to uniform temperatures on a multiple number of friction surfaces, thereby improving accuracy of a lock-up control and to prevent shudders of a vehicle from being generated. The lock-up clutch includes a front cover, a lock-up piston, a plurality of torque transmitting plates, and a plurality of friction materials formed on the torque transmitting plates and having three or more friction surfaces. The friction materials are constituted by a first friction material frictionally contactable with the front cover, a second friction material frictionally contactable with the lock-up piston, and third friction materials frictionally contactable with at least one of the plates. Three or more friction surfaces are constituted by outside friction surfaces formed on the first and second friction materials and each having a small area, and inside friction surfaces formed on the third friction materials and each having a large area.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: February 25, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Toshiya Yamashita
  • Patent number: 8567584
    Abstract: A friction plate, including: a ring-shaped piece of friction material with an inner circumference, and first and second surfaces facing in first and second opposite axial directions, respectively; a first core plate with a first ring-shaped body, a first plurality of protrusions extending radially outward from the first ring-shaped body and imbedded in the first surface, and a second plurality of protrusions extending radially inward from the first ring-shaped body; and a second core plate with a second ring-shaped body, a third plurality of protrusions extending radially outward from the second ring-shaped body and embedded in the second surface, and a fourth plurality of protrusions extending radially inward from the second ring-shaped body. The first and second bodies are at least partially disposed radially inward of the inner circumference. The second and fourth pluralities of protrusions are for engagement with a rotatable element.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: October 29, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Chris Luipold
  • Patent number: 8556051
    Abstract: The invention relates to a clutch assembly, particularly for use in force transmission devices for motor vehicle, comprising a housing arrangement that is or can be filled with a fluid, and a frictional arrangement that has a first frictional surface arrangement and a second frictional surface arrangement which can be effectively interconnected by means of an actuator. Each frictional surface arrangement is provided with at least one frictional surface-supporting element. A fluid flow can be generated in the housing arrangement for cooling the frictional surface arrangements. The invention is characterized in that means are provided for creating at least one circuit which repeatedly flows through at least one frictional surface-supporting element of the frictional arrangement and conducts the fluid flow when the rotational speed differs between the effectively interconnectable frictional surface-supporting elements of the different frictional surface arrangements.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: October 15, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Toros Guelluek, Thorsten Krause, Bruno Mueller
  • Patent number: 8500591
    Abstract: A vehicle final drive includes a fixed spindle about which a wheel hub is mounted for rotation by wheel bearings, and within which a park and service brake assembly is mounted including a stack of Belleville springs carried by an input quill mounted within an inner end region, and a disc brake pack mounted within an outer end region. Located in the hub outboard of the spindle is a two-stage planetary reduction transmission. A reaction plate is fixed to an outer end face of the spindle cylindrical portion and holds the disc brake pack and a hub of a double ring gear of the transmission in place and preloads the wheel bearings. A fluid distribution manifold is defined by a passage in the spindle for distributing flow for cooling and/or lubricating an input thrust bearing, input drive shaft coupling splines, the brake disc pack, the wheel bearings, and the first stage planet gear bearings.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: August 6, 2013
    Assignee: Deere & Company
    Inventors: Jeffrey S. Turner, Mark J Besler
  • Patent number: 8474590
    Abstract: A friction part for a frictionally acting device comprising an annular friction surface which has an inner edge and an outer edge, with the friction surface having provided in it an encircling first groove which extends in zig-zag or undulating form between radially inner and radially outer deflection points, a plurality of second grooves which extend from the inner edge to the outer deflection points and a plurality of third grooves which extend from the outer edge into the encircling first groove and which open into the encircling first groove at opening-in points between the deflection points.
    Type: Grant
    Filed: May 31, 2008
    Date of Patent: July 2, 2013
    Assignee: BorgWarner Inc.
    Inventors: Emilio Fabricius, Volker Reiners
  • Patent number: 8424664
    Abstract: The present invention relates to a friction part for a frictionally acting device, having an annular friction face which has an inner edge and an outer edge, wherein at least one set of grooves is provided in the friction face, which set of grooves has a first groove which extends from the inner edge or the outer edge to a branching point between the inner edge and the outer edge, and a second and third groove which extend in each case from the branching point to the other edge. According to the invention, the second groove is inclined in the one peripheral direction and the third groove is inclined in the other peripheral direction of the direction face with respect to a radial line through the branching point. The present invention also describes a frictionally acting device having a frictions part of said type.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: April 23, 2013
    Assignee: Borgwarner, Inc.
    Inventors: Emilio Luciano Giuseppe Fabricius, Salvatore Contrino
  • Patent number: 8408372
    Abstract: An embodiment of a multidisk oil-bath clutch having: a housing mounted to rotate about a longitudinal axis of rotation; at least one hub mounted to rotate about the longitudinal axis of rotation and housed inside and coaxially with the housing; a number of drive disks housed inside the housing and angularly integral with the housing or the hub; a number of driven disks housed inside the housing, alternating with the drive disks, and angularly integral with the hub or the housing; at least one oil inlet into the housing; and at least one oil outlet from the housing. Each drive disk has a number of first circulation channels equally spaced about the longitudinal axis of rotation and extending radially from an inner edge of the drive disk to an outer edge of the drive disk; and each driven disk has a number of second circulation channels equally spaced about the longitudinal axis of rotation and extending radially from an inner edge of the driven disk to an outer edge of the driven disk.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: April 2, 2013
    Assignee: Ferrari S.p.A.
    Inventor: Franco Cimatti
  • Publication number: 20130056326
    Abstract: The present invention provides a friction plate having a friction surface formed by sticking an annular friction material to a substantially annular core plate and wherein the friction surface is provided with a first oil groove having an opening portion opened to an inner peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and an outer peripheral edge, and a second oil groove having an opening portion opened to the outer peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and the outer peripheral edge.
    Type: Application
    Filed: November 1, 2012
    Publication date: March 7, 2013
    Applicant: NSK-WARNER K.K.
    Inventor: NSK-WARNER K.K.
  • Patent number: 8327992
    Abstract: The present invention provides a friction plate having a friction surface formed by sticking an annular friction material to a substantially annular core plate and wherein the friction surface is provided with a first oil groove having an opening portion opened to an inner peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and an outer peripheral edge, and a second oil groove having an opening portion opened to the outer peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and the outer peripheral edge.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: December 11, 2012
    Assignee: NSK-Warner K.K.
    Inventors: Tomoyuki Miyazaki, Masahiro Kobayashi
  • Patent number: 8286773
    Abstract: In a frictional engagement apparatus that includes a clutch drum, separator plates, a clutch hub, and friction plates, a plurality of concave portions that dip inward in the plate thickness direction and a plurality of convex portions that protrude outward in the plate thickness direction are formed on an edge of the separator plates and/or a an edge of the friction plates, with each convex portion being arranged between two adjacent concave portions. Ridge lines of the concave portions and the convex portions pass through positions away from a center point of the separator plates and/or the friction plates.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: October 16, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuaki Nakamura, Toshimitsu Sato
  • Patent number: 8205734
    Abstract: A friction disk for a wet-running clutch for a motor vehicle includes a lining carrier ring, provided with connecting areas for connecting the friction disk to a drive side or to a takeoff side of a clutch, and a plurality of friction lining elements, carried on at least one side of the lining carrier ring, fluid flow channels are provided between the friction lining elements which are directly adjacent to each other in the circumferential direction, wherein at least some of the fluid flow channels have different channel widths.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: June 26, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Jörg Sudau, Rüdiger Lotze, Arthur Schröder, Gregor Sueck
  • Patent number: 8167107
    Abstract: A wet clutch having friction surfaces, where at least one friction surface consists of a porous friction lining with essentially flat surface placed on a supporting part. In order to achieve better cooling of the friction lining and supporting part and of the opposing friction surface by means of cooling oil pressed through the porous friction lining under pressure, the friction lining is provided with at least one cut-out.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: May 1, 2012
    Assignee: Schaeffler Technoloiges AG & Co. KG
    Inventors: Scott Schrader, Yang Liang
  • Publication number: 20120097492
    Abstract: The present invention provides a friction plate having a friction surface formed by sticking an annular friction material to a substantially annular core plate and wherein the friction surface is provided with a first oil groove having an opening portion opened to an inner peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and an outer peripheral edge, and a second oil groove having an opening portion opened to the outer peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and the outer peripheral edge.
    Type: Application
    Filed: December 30, 2011
    Publication date: April 26, 2012
    Inventors: TOMOYUKI MIYAZAKI, Masahiro Kobayashi
  • Patent number: 8162123
    Abstract: A friction plate for a wet-type multiplate clutch is provided with a core plate and friction linings bonded on opposite sides of the core plate, respectively. Each of the friction linings is composed of plural segment pieces each have at least one first oil groove and at least one second oil groove. The first oil groove opens to a radially-inner side of its corresponding segment piece and has a closed end portion located in a radially-intermediate part of the corresponding segment piece. The second oil groove opens to a radially-outer side of the corresponding segment piece and has a closed end portion located in another radially-intermediate part of the corresponding segment piece. Each segment piece is provided with at least one press-formed oil groove as one of the first and second oil grooves and at least one punched-out oil groove as the other one of the first and second oil grooves.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: April 24, 2012
    Assignee: NSK-Warner K.K.
    Inventor: Tsuyoshi Hirayanagi
  • Patent number: 8157071
    Abstract: The clutch of the present invention has a reaction plate, a friction plate, a friction layer, and at least one non-compressible member. The friction plate is disposed adjacent the reaction plate for frictionally engaging the reaction plate to transfer a driving torque between the reaction plate and the friction plate when the compression force is applied. The friction layer has at least one groove. The at least one non-compressible member is disposed in the at least one groove for preventing further compression of the friction layer by the reaction plate. The at least one non-compressible member is adhered to the friction plate or press fit within the friction layer.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: April 17, 2012
    Assignee: GM Global Technology Operations LLC
    Inventor: Gregory Mordukhovich
  • Patent number: 8157075
    Abstract: Provided is a wet friction material that includes a ring shaped flat metal core and a plurality of segment-type friction material substrates joined onto one or both of surfaces of the ring shaped flat metal core with an adhesive and spaced apart along an entire circumference of the ring shaped flat metal core to form a plurality of oil grooves extending in a radial direction of the core metal by a clearance between adjacent ones of the above segment pieces. One or both of outer peripheral corner portions of each of the plurality of segment-type friction material substrates is chamfered to form a chamfered part such that a width of the oil grooves adjacent the chamfered part of the corner portions is larger than a width of a thinnest portion of the above plurality of the oil grooves.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: April 17, 2012
    Assignee: Aisin Kako Kabushiki Kaisha
    Inventors: Hiroki Okamura, Yoshihito Fujimaki
  • Patent number: 8146725
    Abstract: The present invention provides a friction plate having a friction surface formed by sticking an annular friction material to a substantially annular core plate and wherein the friction surface is provided with a first oil groove having an opening portion opened to an inner peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge and an outer peripheral edge, and a second oil groove having an opening portion opened to the outer peripheral edge of the friction plate and an end terminating at a point between the inner peripheral edge.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: April 3, 2012
    Assignee: NSK-Warner K.K.
    Inventors: Tomoyuki Miyazaki, Masahiro Kobayashi
  • Patent number: 8113330
    Abstract: A friction disk for a wet-running clutch for a motor vehicle includes a lining carrier ring, provided with connecting areas for connecting the friction disk to a drive side or to a takeoff side of a clutch, and a plurality of friction lining elements, carried on at least one side of the lining carrier ring, Fluid flow channels are provided between the friction lining elements which are directly adjacent to each other in the circumferential direction, wherein at least some of the fluid flow channels have different channel widths.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: February 14, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Jörg Sudau, Rüdiger Lotze, Arthur Schröder, Gregor Sueck
  • Patent number: 8061498
    Abstract: A wet clutch friction plate is provided in which a plurality of oil channels (22) are formed in a friction material (21) bonded to one side face or opposite side faces of a core plate (20), the plurality of oil channels (22) providing communication between inner and outer peripheral edges of the friction material (21), and a plurality of oil channels (22) having a discharge angle (?) that discharge oil from an inner peripheral side to an outer peripheral side of the friction plate (15) when the friction plate (15) rotates and a plurality of oil channels (22) having an inflow angle (?) that draw oil in from the outer peripheral side to the inner peripheral side of the friction plate (15) are mixed at substantially equal intervals. In this way, the frictional properties can be stabilized when connection of the clutch is in transition, and the phenomenon of drag due to oil viscosity resistance can be suppressed when the clutch is in an off state.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: November 22, 2011
    Assignee: Kabushiki Kaisha F.C.C.
    Inventors: Akira Tsuboi, Satoshi Kawamura, Mitsuo Miyatsu, Fumiyoshi Iida
  • Patent number: 8051968
    Abstract: A clutch unit for use in the drive train of a motor vehicle between a drive unit and a transmission including at least one transmission input shaft. The clutch unit includes at least one wet clutch device that is provided with a plurality of clutch elements, in particular clutch discs, that are at least partially wetted by a coolant such as oil. The coolant carries away frictional heat that is generated by slippage between adjacent clutch discs during certain vehicle operating conditions. The heat absorbed by the clutch coolant is cooled by heat transfer from the coolant to a cooler that surrounds the clutch unit.
    Type: Grant
    Filed: September 7, 2008
    Date of Patent: November 8, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Johannes Arnold, Ivo Agner, Oliver Nöhl
  • Patent number: 7984801
    Abstract: In a friction plate 40, segment pieces 42 of a friction material are bonded onto a core plate 40 at intervals in a circumferential direction. 43 denotes a spline tooth. On each segment piece, there are formed a first oil groove which is made to open to an inside-diameter side of the segment piece and has its end portion part-way along the segment piece (hereinafter, referred to as a first oil groove) and a second oil groove which is made to open to an outside-diameter side of the segment piece and has its end portion part-way along the segment piece (hereinafter, referred to as a second oil groove). Segment pieces in which a first oil groove 51 and second oil grooves 61 are pressure molded and segment pieces in which a first oil grooves 52 and second oil grooves 62 are stamped are arranged alternately.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: July 26, 2011
    Assignee: NSK-Warner Kabushiki Kaisha
    Inventor: Tsuyoshi Hirayanagi
  • Patent number: 7980375
    Abstract: A friction plate for a wet-type multiplate clutch is provided with a core plate and friction linings bonded on opposite sides of the core plate, respectively. Each of the friction linings is composed of plural segment pieces each having at least one first oil groove and at least one second oil groove. The first oil groove opens to a radially-inner side of the friction plate and has a closed end portion located in a radially-intermediate part of the friction lining, and the second oil groove opens to a radially-outer side of the friction plate and has a closed end portion located in another radially-intermediate part of the friction lining. The second oil groove has an opening flared outwardly in a radial direction.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: July 19, 2011
    Assignee: NSK-Warner K.K.
    Inventors: Hideaki Suzuki, Hiroyuki Kinpara, Masahiro Kobayashi, Tsuyoshi Hirayanagi
  • Patent number: 7958984
    Abstract: A friction plate for a wet-type multiplate clutch can include a core plate and friction linings bonded on opposite sides of the core plate, respectively. Each of the friction linings can include plural segment pieces bonded at angular intervals on a corresponding opposite side. The segment pieces can each include at least one first oil groove and at least one second oil groove. The first oil groove opens to a radially-inner side of its corresponding segment piece and has a closed end portion located in a radially-intermediate part of the corresponding segment piece. The second oil groove opens to a radially-outer side of the corresponding segment piece and has a closed end portion located in another radially-intermediate part of the corresponding segment piece. Adjacent ones of the segment pieces are provided, in radially-middle parts of opposing side walls thereof, with angularly-extending recessed portions, respectively.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: June 14, 2011
    Assignee: NSK-Warner K.K.
    Inventors: Masahiro Kobayashi, Hiroyuki Kinpara
  • Publication number: 20110114438
    Abstract: A friction disk for a wet-running clutch for a motor vehicle includes a lining carrier ring, provided with connecting areas for connecting the friction disk to a drive side or to a takeoff side of a clutch, and a plurality of friction lining elements, carried on at least one side of the lining carrier ring, fluid flow channels are provided between the friction lining elements which are directly adjacent to each other in the circumferential direction, wherein at least some of the fluid flow channels have different channel widths.
    Type: Application
    Filed: January 20, 2011
    Publication date: May 19, 2011
    Applicant: ZF Friedrichshafen AG
    Inventors: Jörg SUDAU, Rüdiger LOTZE, Arthur SCHRÕDER, Gregor SUECK
  • Patent number: 7931134
    Abstract: The disclosed clutch includes a reaction plate, a friction plate, a friction layer, at least one non-compressible member and a fluid lubricant. The friction layer has a coefficient of friction that is sufficient to prevent relative rotation of the reaction and friction plates when the friction layer is compressed by the reaction plate. Further, the friction layer has at least one groove. At least one non-compressible member is disposed in the at least one groove to prevent further compression of the friction layer by the reaction plate. The at least one non-compressible member is mechanically fastened to the friction plate.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: April 26, 2011
    Assignee: GM Global Technology Operations LLC
    Inventor: Gregory Mordukhovich