Patents Assigned to LuK Lamellen und Kupplungsbau Beteiligungs KG
  • Patent number: 8057336
    Abstract: A guide device for an endless torque-transmitting member. The guide device includes at least two corresponding guide tongues between which the endless torque-transmitting member is at least partially guided. The guide tongues are held at a predetermined distance from each other by a connection region. The distance between the guide tongues is maintained substantially constant when there is a temperature change by the use in the guide device of materials having different coefficients of thermal expansion. A mold for producing a guide device is disclosed and includes two corresponding mold halves, where at least one connecting component formed from a material having a lower coefficient of thermal expansion than that of the guide tongues is held in one mold half.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: November 15, 2011
    Assignee: Luk Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Hans-Walter Wodtke, Thomas Krauss
  • Patent number: 8057343
    Abstract: A plate-link chain for a motor vehicle drive system. The chain includes a number of link plates hingedly connected with each other by rocker members that extend transversely to the longitudinal direction of the plate-link chain and are positioned in openings of the link plates. Curved contact surfaces are located on each of the rocker members and link plates, along which contact surfaces the rocker members and link plates are in contact with each other to transmit power. The rocker members are shaped asymmetrically in the height direction and are provided in contacting pairs. The link plate openings include at least one inwardly-curved region that is located above a contact point line extending through contact points of contacting rocker members of adjacent rocker member pairs that roll against each other.
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: November 15, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Anton Simonov, Michael Pichura, Olga Ispolatova, Marcus Junig, Martin Vornehm
  • Patent number: 8056330
    Abstract: A torque converter includes a plurality of blades and a core ring supporting the plurality of blades. The core ring includes at least two segments, each segment having two circumferential ends. A core ring and method are also provided.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: November 15, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Kevin Parks, Michael Vansickle
  • Patent number: 8056686
    Abstract: A torque converter includes a turbine, a lockup clutch including a piston, and a damper having at least one cover plate, the cover plate being attached directly to piston. A method for assembling the torque converter includes passing a section of the piston through a hole in the cover plate and attaching the piston to the cover plate at the hole.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: November 15, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventor: Jonathan Jameson
  • Patent number: 8057342
    Abstract: A plate-link chain for a motor vehicle drive system. The chain includes a plurality of link plates hingedly connected with each other by rocker members that extend transversely to the longitudinal direction of the plate-link chain and are positioned in openings of the link plates. The rocker members and link plates each have curved contact surfaces. The rocker members also have curved rolling surfaces along which the rocker members roll against each other. The rocker members are shaped asymmetrically in the height direction, and the contact surfaces are provided on upper and lower contact surface regions. The rocker members also have at least two regions with different curvatures in the regions of their rolling surfaces.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: November 15, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Marcus Junig, Anton Simonov, Olga Ispolatova, Michael Pichura
  • Patent number: 8056692
    Abstract: A sealing system with at least one sealing device for a pressurizing-agent-operable actuating device, for sealing off a pressure chamber assigned to the latter from the surroundings. The individual sealing element being placed in a groove formed by the actuating device and a thin sheet metal element connected to the actuating device, where at least two contact surfaces that describe the groove are formed on the actuating device for the sealing element.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: November 15, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventor: Philip George
  • Patent number: 8057341
    Abstract: A chain drive with at least two sprocket wheels provided with teeth having an evolvent spline, and a toothed chain that engages therewith, especially for a vehicle propulsion system, which toothed chain includes individual rows of link plates that have openings, wherein the link plates are movably connected with each other by rocker pieces penetrating the openings and have chain teeth. The chain drive is characterized in that the tooth flanks of at least one tooth of least one of the sprocket wheels are designed differently.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: November 15, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Stephan Penner, Marcus Junig, Anton Simonov, Michael Pichura
  • Patent number: 8051650
    Abstract: A hydraulic system for actuating a clutch and/or a variable speed drive unit of a belt-driven conical-pulley transmission of a vehicle, such as a commercial vehicle, and having a variable transmission ratio and a torque sensor. The hydraulic system includes at least one hydraulic energy source. A selector and check valve is provided for supplying additional components besides the torque sensor and is connected between the hydraulic energy source, the additional components, and the torque sensor in such a way that the torque sensor includes priority in being supplied with hydraulic medium.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: November 8, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Christoph Vetter, Eric Müller, Reinhard Stehr, Hanjo Nissen, Volker Edelmann
  • Patent number: 8052561
    Abstract: A method for optimizing the link plates of a plate-link chain drive chain for use in a variable speed unit of a belt-driven conical-pulley transmission. The chain includes plate links formed from pairs of plates that have openings through which pairs of rocker members extend. The plates include longitudinally-extending legs that extend in the chain movement direction and vertical legs that extend perpendicular to the chain movement direction. The method is directed to minimizing bending stresses in the longitudinal and vertical legs of the plates as the chain passes around a pulley, and as the rocker members and the chain tension impose forces on the plates. The stress minimization results in minimal material usage and minimal weight of the chain.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: November 8, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Wolfgang Oberle, André Teubert
  • Patent number: 8052562
    Abstract: A transmission for coupling a starter-generator electrical machine to an internal combustion engine and having a transmission ratio that is a function of the rotational speed of the internal combustion engine. The ratio of the rotational speed of the electrical machine to that of the internal combustion engine can be increased at a lower rotational speed of the internal combustion engine than at a higher rotational speed of the internal combustion engine. A control device is provided for switching the transmission ratio, which is held by means of spring force in a condition in which the ratio of rotational speeds is high, and as the rotational speed of the internal combustion engine rises increases the transmission ratio is switched to a condition in which the ratio of rotational speeds is lower.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: November 8, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Peter Greb, Oswald Friedmann
  • Patent number: 8051652
    Abstract: A hydraulic system including a multi-flow hydraulic pressure supply unit, especially a dual-flow hydraulic pressure supply unit, such as a pump, by which a volumetric flow of pressurized fluid is supplied to a hydraulic-fluid-operated device. A valve arrangement is provided either for switching between the individual pump flows or for interconnecting the individual pump flows.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: November 8, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Eric Müller, Reinhard Stehr, Manfred Homm, Michael Reuschel, Norbert Indlekofer, Andreas Englisch, Martin Vornehm, Christian Lauinger
  • 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: 8016706
    Abstract: A plate-link chain composed of a plurality of plates that form plate sets, which are connected to an adjacent plate set with a hinge joint. At least some of the plates have a stopping means that limits bending of the plate-link chain in a direction opposite to the bend direction the chain undergoes when it passes over and around a pulley or a gear with which the chain comes into contacting engagement when the pulley or gear rotates.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: September 13, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Marcus Junig, Anton Simonov, Olga Ispolatova, Michael Pichura, Martin Vornehm, Aurel Vietoris
  • Patent number: 8007388
    Abstract: A plate-link chain for a belt-driven conical-pulley transmission having a continuously variable transmission ratio and having a large number of link plates pivotally connected with each other via pairs of rocker members that each includes two rocker members. The rocker members extend transversely to the longitudinal direction of the plate-link chain and are positioned in openings in the link plates. Curved contact surfaces are provided on the rocker members and on the link plate openings, along which curved surfaces of the rocker members and link plates bear against each other to transmit force. Curved rolling surfaces are provided on the rocker members, along which contacting rocker members of a rocker member pair roll against each other and/or slide on each other on pitch lines to transmit force. The link plate openings have at least three inwardly extending, convexly curved regions.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: August 30, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Anton Simonov, Michael Pichura, Olga Ispolatova, Marcus Junig
  • Patent number: 7987824
    Abstract: A device for hydraulic control of gas exchange valves of a reciprocating internal combustion engine which has slave cylinders in operative connection with one or more gas exchange valves and master actuators in operative connection with at least one cam provided with a basic and cam profile of a camshaft that is rotatably driven by the engine and can be hydraulically connected to the slave cylinders. The device also has a control device controlled by an actuating member, the device controlling the volume of hydraulic liquid fed to the slave cylinders, and at least one feed line, via which low pressure liquid from a pressure source can be fed to the device by means of at least one non-return valve. The actuators have displaceable vanes, a component carrying the vanes, and cells limited by walls. The vanes are in operative connection with the basic and cam profile of the cam.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: August 2, 2011
    Assignees: Schaeffler KG, Aft Atlas Fahrzeugtechnik GmbH, Luk Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Michael Haas, Eduard Golovatai-Schmidt, Martin Rauch, Wolfgang Reik, Dirk Neubauer, Detlef Axmacher, Lars Pfuetzenreuter, Dirk Kenter
  • Patent number: 7975474
    Abstract: A hydraulic system including a pump for feeding hydraulic fluid from an inlet side to an outlet side. A pressure accumulator is disposed at the outlet side, and between the pump and the pressure accumulator a hydraulic control valve is disposed, which has at least two valve positions. The outlet side of the pump is connected to the pressure accumulator in a second valve position, and is separated from the pressure accumulator in a first valve position. The outlet side of the pump is connected to the inlet side through the control valve in the first valve position.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: July 12, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Martin Staudinger, Laurent Ineichen, Marco Grethel, Eric Müller
  • Publication number: 20110155533
    Abstract: The invention relates to a hydraulic system for controlling a vehicle transmission with automated actuation of clutches of a motor vehicle, having: a first valve connected downline from a hydraulic energy source for producing a system pressure to control and/or regulate a clutch pressure, a second valve connected downline from the first valve and ahead of two clutches of the vehicle transmission with automated actuation of clutches to control and/or regulate the clutch pressure. In order to provide an improved hydraulic system, the latter has a regulating circuit to regulate the clutch pressure.
    Type: Application
    Filed: December 6, 2008
    Publication date: June 30, 2011
    Applicant: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Holger Muller, Mario Schaufler
  • Patent number: 7967122
    Abstract: A torque transmitting device in a drive train of a motor vehicle to transmit torque between an internal combustion engine having a drive shaft and a transmission having coaxial input shafts. The transmission input shafts are each non-rotatably connected with a respective clutch disc having friction linings. An intermediate pressure plate is positioned between the friction linings of the clutch discs and is non-rotatably connected to the engine drive shaft. The friction linings of the clutch discs are between the intermediate pressure plate and respective axially movable clutch pressure plates that are actuated by an actuation device. To provide support for the double clutch unit the intermediate pressure plate is radially mounted on one of the two transmission input shafts.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: June 28, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Oswald Friedmann, Rolf Meinhard
  • Patent number: 7967707
    Abstract: An input-side drive arrangement for a belt-driven conical-pulley transmission includes an input shaft that is rigidly connected to an axially fixed disk, and an axially movable disk that can be shifted axially on the shaft and is rotationally fixed to the shaft. A torque-sensing device has a first shaped surface that is rigidly connected to the shaft and a second shaped surface that is rigidly connected to a sensing piston that surrounds the shaft and is rotatable and axially movable relative to the shaft. The sensing piston engages a rotationally drivable input wheel and can be subjected to hydraulic pressure from the side facing the movable disk. The rotationally fixed and axially movable engagement between the sensing piston and the input wheel is such that the engagement is disconnected when there is torque acting from the movable disk and the sensing piston is not under hydraulic pressure.
    Type: Grant
    Filed: December 17, 2006
    Date of Patent: June 28, 2011
    Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventor: Hartmut Faust
  • Patent number: 7966116
    Abstract: A method for controlling dual clutch transmission with at least two partial drive trains, each arranged to be coupled with an engine by means of a clutch, in that, a first clutch of an actively operated partial drive train currently transmitting torque is opened, whereas a second clutch of the partial drive train not actively operated is closed in the already engaged gear and determining a reduction of a maximum possible lateral guiding force of at least one drive wheel and determining torque transmitted by the clutches, wherein, in the case of reduction of the maximally possible lateral guiding force below a default value and in the case that torque is transmitted by both clutches, the torque of one of the clutches is reduced.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: June 21, 2011
    Assignees: LuK Lamellen und Kupplungsbau Beteiligungs KG, Getrag Getriebe-und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG
    Inventors: Heiko Priller, Thomas Weber, Juergen Eich, Tobias Kalisch, Ralf Hettich, Marc Kramer, Martin Seufert