Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7484607 | Torsional vibration damper A torsional vibration damper in a gearbox housing has an input part connected to a drive and acts on a first damping unit and an intermediate part which acts as the output of the first damping unit and as the input of a second damping unit. The torsional vibration d... | 02/03/2009 |
| 7351175 | Drive train for a motor vehicle A drive train for a motor vehicle includes a coupling device between a drive unit and a transmission for torque or moment transfer between the drive unit and the transmission. The coupling device has at least one coupling arrangement that can be activated by a press... | 04/01/2008 |
| 7147095 | Gearshift transmission for a motor vehicle with hydraulically actuated multiple clutch A gearshift mechanism for a motor vehicle with hydraulically actuated multiple clutch, particularly a twin clutch, has a first gear input shaft to drive a first group of gears and a second gear input shaft to drive a second group of gears. The two gear input shafts ... | 12/12/2006 |
| 7114605 | Double or multiple disk coupling device and disk arrangement therefor A multiple disk clutch device for arrangement in a drivetrain of a motor vehicle between a drive unit and a transmission, includes at least an inner and an outer disk clutch arrangement that are radially staggered and associated with a transmission input shaft of th... | 10/03/2006 |
| 7021422 | Clutch system A clutch system includes a clutch arrangement between a drive unit and a transmission, a pump arrangement which supplies pressure medium to the clutch arrangement at a pressure and rate of flow, and an operating medium supply arrangement which supplies an operating ... | 04/04/2006 |
| 6789658 | Clutch system A clutch system includes a clutch device with at least one clutch arrangement for installation in a motor vehicle drive train between a drive unit and a transmission. The at least one clutch arrangement is actuated by a slave cylinder using a pressure medium which i... | 09/14/2004 |
| 6702084 | Clutch operator arrangement A clutch operator arrangement for introducing an actuating force into a friction clutch includes a ball screw arrangement.... | 03/09/2004 |
| 6644451 | Release mechanism for a double clutch assembly A release bearing is provided for transmitting release force to a corresponding force accumulator of each of the first and second clutch regions of the double clutch assembly, the release bearings being arranged in succession in the direction of an axis o... | 11/11/2003 |
| 6584869 | Ball screw A ball screw includes a spindle element which has a first groove arrangement on an outer circumferential surface, a nut element which surrounds the spindle element and has a second groove arrangement on an inner circumferential surface, and a plurality of... | 07/01/2003 |
| 6575471 | Cylinder for a hydraulic system In a cylinder for a hydraulic system, a seal has a sealing bead clamped between a housing of the cylinder and a supporting part which holds the sealing bead in a deformed state by pretensioning. The seal is reliably held in its intended position by the su... | 06/10/2003 |
| 6454314 | Seal for a plug-in connection An elastomeric seal seals a pipe which is held in a push-in part of a plug-in coupling relative to a cylindrical interior surface of a housing of the plug-in coupling, into which the push-in part is pushed together with the pipe. The seal is in prestresse... | 09/24/2002 |
| 6343541 | Damping device for hydraulic adjustment devices in motor vehicles A damping device for installation in a hydraulic adjustment device such, for example, as for motor vehicle clutches. The hydraulic adjustment device has a cylinder that is either an input cylinder or actuator or an output cylinder. The input cylinder or a... | 02/05/2002 |
| 6294854 | Drive arrangement for a motor vehicle A drive arrangement for a motor vehicle, which has at least one internal combustion engine and a down-line clutch, via which the internal combustion engine can be connected to an output drive shaft. An electric machine is provided and includes a rotor and... | 09/25/2001 |
| 6250201 | Throttle device for hydraulic adjustment devices in motor vehicles A throttle device for use with a hydraulic adjustment devices that have an input cylinder and an output cylinder and a hydraulic line filled with fluid connecting the output cylinder and the input cylinder, is arranged in the hydraulic line for establishi... | 06/26/2001 |
| 6123181 | Articulation head for a clutch-release rocker arm of a friction clutch An articulation head for a clutch-release rocker arm of a friction clutch of a motor vehicle is sealed with respect to dust and abraded material by means of an elastic sleeve. The sleeve is clamped between flanges of a ball shaft and a bearing shell. Cons... | 09/26/2000 |
| 6116399 | Friction clutch for a motor vehicle and an operation device for the operation, especially pneumatic operation, of a friction clutch An operation device for a friction clutch arranged in the drive train of a motor vehicle. The operation device includes a positioning servo arrangement with a pneumatic power cylinder arrangement. The pneumatic power cylinder arrangement acts on a clutch ... | 09/12/2000 |
| 6041692 | Operation of pressure medium cylinders in motor vehicles Disclosed is a pressure medium cylinder, especially a hydraulic input cylinder, located on the chassis of a motor vehicle and operated by means of a pedal, whereby the tappet for operating the piston in the cylinder housing can be attached to different le... | 03/28/2000 |
| 5996468 | Piston-cylinder unit A piston-cylinder unit for a hydraulic system, especially for the actuation of clutches in motor vehicles, comprises a housing with an axially stepped bore hole in which a piston fastened to a tappet is guided so as to be axially displaceable. The piston ... | 12/07/1999 |
| 5979632 | Disengagement mechanism for clutch actuation in motor vehicles A sliding sleeve for a disengagement mechanism for clutch actuation in motor vehicles has at least two pairs of cams with convexities of different heights from an actuation level on the sliding sleeve that is connectable to the clutch. Each of the pairs o... | 11/09/1999 |
| 5964333 | Friction clutch and a slave cylinder for the operation of a friction clutch A slave cylinder for the operation of a friction clutch, especially in motor vehicles, with a housing, an inner portion, an annular or cylindrical piston which annular piston is positioned between the housing and the inner portion, a clutch release sleeve... | 10/12/1999 |
| 5960922 | Hydraulic cylinder such as a clutch master or servant cylinder in a motor vehicle having a bleed element A cylinder for pressure media, in particular a hydraulic master or slave cylinder in motor vehicles, having a bleed element which can be screwed into an aperture in the cylinder casing and which bleed element is sealed against the casing. The bleed elemen... | 10/05/1999 |
| 5937988 | Throttle device for hydraulic actuator systems and for hydraulic actuator systems of clutches of motor vehicles A throttle device for the directionally-dependent influencing of the flow velocity of the fluid in hydraulic actuator systems, in particular of friction clutches in motor vehicles, with a throttle located between a master cylinder and a slave cylinder in ... | 08/17/1999 |
| 5908097 | Friction clutch assembly with a device for indicating wear on a friction clutch and a device for indicating wear on a friction clutch for a friction clutch assembly A wear indicator for a friction clutch which is located in the drive train in a housing between an engine and a transmission. The wear indicator includes a marking which is stationary relative to the housing during operation of the friction clutch, and a ... | 06/01/1999 |
| 5860502 | Hydraulically operated clutch assembly for a motor vehicle having a detachable plug-type connector A detachable plug-type connector, in particular for the connection of a pressure line to a hydraulic cylinder with a pin-shaped inner part, which pin-shaped inner part can be inserted in a boring of an outer part. Between the outer part and the inner part... | 01/19/1999 |
| 5806646 | Friction clutch with mechanically-operated concentric disengagement device A friction clutch with a mechanically-operated disengagement device that includes two elements that can be turned relative to one another, which are arranged concentric to the rotational axis and are supported on the clutch housing, on the one hand, and o... | 09/15/1998 |
| 5779019 | Hydraulically operated clutch assembly for a motor vehicle having a cylinder with a plug-in connection A cylinder for hydraulic systems, in particular for motor vehicles, generally includes a housing having an axial hole in which a piston is guided so that the piston can be displaced axially. One end surface of the piston can be pressurized by means of hyd... | 07/14/1998 |
| 5704462 | Cylinder for hydraulically operated clutches and brakes and hydraulically operated clutch assemblies for motor vehicles A cylinder for hydraulic systems, in particular for motor vehicles, includes a housing with an axial boring, in which a piston fastened to a piston rod is displaced axially in a guided manner, and one end surface of which is pressurized with hydraulic flu... | 01/06/1998 |
| 5620076 | Hydraulically actuated clutch release system A hydraulically actuated clutch release system for a motor vehicle friction clutch, including a piston-cylinder unit oriented concentrically to a transmission input shaft, whereby the cylinder is fastened to the transmission housing, and has the cylinder ... | 04/15/1997 |
| 5307915 | Fluid-actuable releaser for a friction clutch The invention relates to a fluid-actuable releaser in which an annular piston (6) is guided in a casing (3) which is provided with a sleeve (10) for guiding the annular piston (6) radially internally and for sealing purposes, the sleeve (10) being axially... | 05/03/1994 |
| 5287951 | Hydraulically actuable releaser for a motor vehicle friction clutch The invention relates to a hydraulically actuable releaser with an annular piston. The supporting ring co-operating with the annular piston and the groove sealing ring co-operating with the supporting ring have, at least in their radially outer region fac... | 02/22/1994 |
| 5211099 | Slave cylinder for a hydraulic actuating system of a motor vehicle friction clutch A slave cylinder of the annular cylinder type is proposed, whereof the annular piston (45) able to slide axially between an outer cylinder wall (29) and an inner cylinder wall (33) is sealed by a grooved sealing ring (53) with respect to the pressure cham... | 05/18/1993 |
| 5062513 | Hub guidance for friction clutch The invention relates to the guidance of the hub (23) of a clutch disc (13) of a friction clutch (1), independently of the splining (27) of the gear shaft (29). The guidance of the clutch disc (13) takes place through a bearing (41) which supports itself ... | 11/05/1991 |
| 4809830 | Torque transmitting torsional vibration damper device In a torque transmitting torsional vibration damper device for use in a torque transmission path of a motor vehicle between the engine and the gear box a central plate is provided. Two sides plates are provided on both sides of the central plate. The side... | 03/07/1989 |
| 4782718 | Fly-wheel unit for an internal-combustion engine In a fly-wheel unit of any desired construction type including two separate fly-wheel members, the torsion springs are housed in a liquid receiving chamber which is at least partially filled with a lubricant or with a coolant. In this way inherent noises ... | 11/08/1988 |
| 4332679 | Device for indicating the degree of exhaustion of an adsorption filter A filtering apparatus for indicating the degree of exhaustion of an adsorption filter which includes a mechanical filter and a pressure meter for detecting the difference in pressure between a point downstream and a point upstream of the mechanical filter... | 06/01/1982 |
