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| Number | Title | Issue Date |
| 7954615 | Device for actuating a multiplate clutch in a transmission A device for actuating a disk clutch (B) in a transmission, which consists of an actuating piston-cylinder arrangement with rotation pressure compensation, whose actuating piston (6) is associated with a pressure chamber (4) for a pressure medium fluid... | 06/07/2011 |
| 7931135 | Multi-area clutch assembly A torque transmitting assembly includes an actuator for engaging a torque transmitting element. A mechanism is connected to the actuator. The mechanism is operable to selectively allow fluid communication therethrough. The mechanism communicates between two separate... | 04/26/2011 |
| 7841458 | Automatic transmission clutch having a one-piece resin balancer A clutch assembly for use in an automatic transmission of a motor vehicle includes a drum movable about a rotational axis and having a generally annular recess for supporting components of the clutch assembly therein. A clutch pack is supported in the recess in the ... | 11/30/2010 |
| 7802667 | Clutch exhaust assembly and method An assembly and method is provided for reducing clutch wear due to centrifugal apply pressure within a clutch-apply cavity. The assembly comprises a rotatable clutch housing, a clutch-apply piston disposed within a clutch-apply cavity, and a balance piston. The bala... | 09/28/2010 |
| 7487865 | Method of controlling a torque-transmitting mechanism and clutch capacity control system A method of controlling a torque-transmitting mechanism in a multi-speed transmission includes providing structure forming a pressurizable reaction chamber at a reaction surface of an apply piston opposing an apply surface of the piston. The reaction chamber is pres... | 02/10/2009 |
| 7431138 | Start-up clutch assembly A start-up clutch including a disk clutch having an outer disk carrier and an inner disk carrier with a multi-disk clutch pack disposed therebetween. The multi-disk clutch pack is adapted to engage and provide torque translation between the inner and the outer carri... | 10/07/2008 |
| 7416069 | Clutch arrangement in an automatic transmission having an installation space-saving coolant supply A clutch arrangement in an automatic transmission, comprising two axially adjacent multi-disk clutches (B, E) to each is assigned a piston/cylinder arrangement for axially actuating the clutch, a pressure compensation space for a dynamic clutch actuation pressure co... | 08/26/2008 |
| 7350635 | Hydraulic double clutch Hydraulic double clutch is provided that includes fluidically interconnected balancing chambers that are associated with a first and a second clutch piston. ... | 04/01/2008 |
| 7320391 | Alternative pack designs for multidisk clutches A method and apparatus reduces hot spotting in transmission clutch packs actuated by a piston with axial fingers engaging the clutch pack. The method and apparatus combine an alternative pack arrangement with the fingered actuator, the alternative pack preferably be... | 01/22/2008 |
| 7318512 | Dual clutch transmission with radially nested clutches having a common disk carrier A dual clutch transmission having radially nested clutches includes an outer clutch having a plurality of first outer clutch disks, a plurality of first inner clutch disks, and a first inner support carrier, with the first inner clutch disks operatively mounted to t... | 01/15/2008 |
| 7311628 | Planetary gear set for an automatic transmission of a vehicle A planetary gear set for an automatic transmission of a vehicle includes a central shaft having a main lubrication path and a penetration hole connected with the main lubrication path, a sun gear, a pinion gear, a ring gear, a planet carrier, a first bearing dispose... | 12/25/2007 |
| 7287635 | Force -transmission unit comprising speed -dependent hydraulic clutch and centrifugal force compensation A power transmission unit with a hydraulic coupling dependent on a rotational-speed difference, in which, when a rotationalspeed difference occurs between the input member (1) and the output member (6), a hydrostatic displacement machine (20) pr... | 10/30/2007 |
| 7287633 | Supporting structure of multi-plate clutch and method of assembling multi-plate clutch and shaft with pump cover A supporting structure of a multiple-plate clutch is constructed by a clutch drum having an outer cylindrical portion in which a spline is formed on an inner periphery, an inner cylindrical portion, and a bottom-wall portion formed at one end of the axial direction,... | 10/30/2007 |
| 7284647 | Clutch device for automatic transmission A clutch device for an automatic transmission, wherein a piston is disposed radially outwardly of a drum supporting frictional coupling elements, and cooperates with the drum to define a hydraulic pressure chamber, and a balancer is disposed on one side of the pisto... | 10/23/2007 |
| 7264085 | Hydraulic passage structure of automatic transmission friction element A hydraulic passage structure of an automatic transmission having at least one friction element for gearshift, the friction element being comprised of a drum. The hydraulic passage structure includes a housing formed integrally with a midway wall protruding inwardly... | 09/04/2007 |
| 7246692 | Dual clutch mechanism for a transmission A dual clutch mechanism includes an input shaft, a first output shaft and a second output shaft. The input shaft is axially spaced from the first and second output shafts, which can allow for a decreased diameter of the dual clutch mechanism. Axially spacing the inp... | 07/24/2007 |
| 7232022 | Clutch-purpose hydraulic servo In a hydraulic servo for a clutch, a cancel plate is disposed on a second clutch drum that undergoes the same rotation as a second clutch drum provided with a cylinder portion, in such a fashion that the cancel plate is restricted from moving to a side opposite from... | 06/19/2007 |
| 7232402 | Motor driven auxiliary pump for electrically-variable transmission torsional damper The present invention relates to a torsional damper for an electrically-variable transmission. The torsional damper is equipped with a hydraulically actuable lock-out clutch to directly couple the engine to the input shaft of the transmission. The electric motors pr... | 06/19/2007 |
| 7223202 | Hydraulic circuit for torsional damper assembly of an electrically variable transmission The present invention relates to a torsional damper for an electrically variable transmission. The torsional damper is equipped with a hydraulically actuable lock-out clutch to selectively directly couple the engine to the input shaft of the transmission. The electr... | 05/29/2007 |
| 7040474 | Bonded clutch piston A clutch assembly is provided including a first member and a second member rotatable relative to the first member. A clutch pack is provided for frictionally engaging the first and second members. A piston chamber is provided adjacent to the clutch pack, and a pisto... | 05/09/2006 |
| 7036646 | Wet-type multiple disc clutch A wet-type multiple disc clutch comprises a clutch plate set having a plurality of friction plates and a plurality of separator plates alternately interposed between a clutch case and a clutch hub. An oil pressure piston slidably retained in a cylinder chamber is di... | 05/02/2006 |
| 7036645 | Rotating torque-transmitting apparatus A rotatable torque-transmitting apparatus includes a stationary piston and a rotatable apply plate. The rotatable apply plate is disposed adjacent a rotatable housing and separated therefrom by a return spring assembly which in a preload condition is trapped between... | 05/02/2006 |
| 7021447 | Apply piston seal for a clutch An apply piston seal is provided for a clutch assembly utilizing a balance piston. The apply piston seal is bonded to the apply piston and provides a sealing relationship between the apply piston and balance piston. By bonding the seal to the apply piston, the manuf... | 04/04/2006 |
| 7001298 | Clutch system for a transmission A clutch system for a transmission with one clutch (1) which comprises one disc carrier (3) and one servo mechanism (10) situated within the disc carrier (3) with dynamic pressure balance for actuating the clutch (1) and with a pla... | 02/21/2006 |
| 6991078 | Hydrodynamic converter with a primary clutch A hydrodynamic converter for the power train of a motor vehicle is proposed which comprises one pump (2), one turbine (3) connected with the transmission input shaft (4) and one stator (guide wheel) (5) and in which the pump (2) is... | 01/31/2006 |
| 6976568 | Clutch arrangement in a transmission having two axially and radially adjacent clutches A clutch arrangement in a transmission, particularly in an automatic transmission or automated selector transmission in the design of a double clutch transmission, having two axially and radially adjacent multi-disc clutches (B, E) in which an inner discs (23... | 12/20/2005 |
| 6935481 | Snap-in balance piston The invention relates to a clutch device with a pressure piston (1) for generating a pressure force for moving a clutch (4, 9, 8, 10, 27), in which the pressure piston (1) is guided to slide in a housing (5, 15.1) and the housing (5, 1... | 08/30/2005 |
| 6929107 | Dual clutch for a transmission with two input shafts The invention relates to a hydraulic twin clutch for a transmission with two transmission input shafts, preferably for a power-shift transmission in motor vehicles, with concentric arrangement of the two transmission input shafts, a driven clutch housing, two hydrau... | 08/16/2005 |
| 6920971 | Cushioned hydraulic clutch/brake piston A hydraulic clutch/brake mechanism has an actuator piston assembly therein to control actuation of the associated clutch/brake. The actuator piston assembly has a damping arrangement disposed therein that is operative to damp the movement of the actuator piston asse... | 07/26/2005 |
| 6840363 | Multi-disk friction device selective lubrication on demand A friction device (10, 110) having a drive member (12, 112) and a driven member (14, 114) which define a clutch housing (16, 116) therebetween. A clutch pack (24, 124) is interposed between the drive and driven members and is opera... | 01/11/2005 |
| 6758786 | Integrated assembly comprising a hydraulic clutch and a planetary gear train, in particular for automatic transmission particularly of vehicles, and automatic transmission comprising same A hydraulic clutch and a speed reducing planetary gear train, with an assembly comprising a fixed feeder block, a rotating crankcase integral with a feeder sleeve receiving at least a piston, a so-called closure wall and at least a set of friction discs for driving ... | 07/06/2004 |
| 6705447 | Piston for hydraulically-operated clutch A hydraulically-operated clutch for an automatic transmission includes a clutch housing assembly with a clutch pack positioned therein. A movable piston is supported in the clutch housing assembly and defines an expandable chamber between the piston and clutch housi... | 03/16/2004 |
| 6684995 | Automatic transmission rotating clutch with no return spring A clutch assembly for a transmission is configured to selectively interconnect a first rotatable member with a second rotatable member by engagement of a clutch pack. The clutch assembly includes a compensator and a piston which is axially moveable with r... | 02/03/2004 |
| 6675944 | Return apparatus for a clutch piston of an automatic transmission In order to minimize an effect of centrifugal force on a release operation of a clutch piston, this invention provides a return apparatus including a spring support rotating at a same speed as the clutch piston, and a return spring abutted at an end again... | 01/13/2004 |
| 6595340 | Charging system for a rotating clutch assembly A clutch assembly and charging system combination for use with an automatic transmission includes a clutch assembly having a clutch that is movable between a clutch engaged position and a clutch disengaged position. The clutch assembly further includes a ... | 07/22/2003 |
| 6595339 | Variable gear ratio transmission The multi-step automatic transmission with a number of clutches and brakes which at least partly are designed as wet-running, multi-disk clutches wherein with each clutch is associated a hydraulic piston (1), is provided with a baffle plate (2) for the fl... | 07/22/2003 |
| 6585088 | Braking system for braking a rotor relative to a stator A braking system for braking a rotor relative to a stator, the braking system comprising braking means respectively secured to the rotor and to the stator, a brake piston, return means for returning the piston to its braking position, a braking chamber, a... | 07/01/2003 |
| 6543597 | Clutch device for an automatic transmission A clutch device for an automatic transmission includes an input member, a first output member, a second output member, a first clutch mechanism formed between the input member and the first output member, a first piston movable in a first axial direction ... | 04/08/2003 |
| 6513636 | Clutch construction for automobile transmission A clutch drum is constituted by a two-piece construction of an inner drum and outer drum. The inner drum is provided with a step at the corner from its disc part to its outer tube, and the vertical wall of the outer drum is butt welded to the step. The in... | 02/04/2003 |
| 6488138 | Multi-disk clutch in a power split transmission Multi-disk clutch connected downstream of a power split transmission consisting of a double clutch whose individual clutches rotate in opposite directions, the rotational-speed dependent axial forces being compensated on the shift piston, and has a valve ... | 12/03/2002 |
