Patents Assigned to Luk Fahrzeug-Hydraulik GmbH & Co. KG
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Patent number: 7263877Abstract: A method for determining the piston stroke of a reciprocating piston machine having a variable stroke, for example a swashplate compressor, a pivoting plate compressor or a pivoting ring compressor, especially for air-conditioning installations in motor vehicles.Type: GrantFiled: November 15, 2002Date of Patent: September 4, 2007Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventors: Tilo Schaefer, Georg Weber
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Patent number: 7258531Abstract: A compressor, in particular an axial piston compressor having an axial piston drive mechanism for the intake and compression of a coolant, has a drive shaft for the drive mechanism with radial bearings of the shaft located at the front and at the rear of the compressor housing. A drive side having a pulley is defined as the front of the compressor, and the compressor includes at least one axial bearing for the shaft, the axial bearing being located in the cylinder head or pressure cover at the rear.Type: GrantFiled: November 21, 2003Date of Patent: August 21, 2007Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventor: Peter Kuhn
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Publication number: 20070128065Abstract: A pump, for example, a vane-cell pump or a roll-cell pump, especially a gear pump, includes a two-stroke pump contour which includes at least one rise zone, at least one large circular area, at least one fall zone and at least one small circular area. The pump includes a rotor with radially displaceable vanes or rolls arranged in radial slits inside the pump contour.Type: ApplicationFiled: June 19, 2004Publication date: June 7, 2007Applicant: LUK FAHRZEUG-HYDRAULIK GMBH & CO. KGInventor: Ivo Agner
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Publication number: 20060281562Abstract: A shaft-hub connection for transferring a torque between a shaft (1) and a hub (3) with the aid of at least one drive element (2). To enable a torque transfer which is practically resistant to wear, even under the effect of transversal forces, the contact surface between the shaft and the hub and/or between the shaft and the drive element and/or between the hub and the drive element is minimized in the axial direction thereof.Type: ApplicationFiled: August 21, 2006Publication date: December 14, 2006Applicant: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventor: Ivo Agner
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Publication number: 20060251511Abstract: A pump, preferably a vane cell pump for supplying a transmission with oil, includes a pump housing and a rotating group which is disposed inside the pump housing. The rotating group includes a side plate that may be mounted inside the pump housing in such a manner as to produce, at least temporarily, an axial gap between the side plate and the pump housing. A shaft is mounted inside the pump housing and a radial packing ring is located in a recess around the shaft. The packing ring seals off the rotating group towards the exterior radially on the pump housing and radially on the shaft using a sealing lip.Type: ApplicationFiled: June 24, 2004Publication date: November 9, 2006Applicant: LUK FAHRZEUG-HYDRAULIK GMBH & CO. KGInventor: Kerstin Rosenkranz
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Publication number: 20060230922Abstract: The invention relates to an axial piston machine, in particular, an air-conditioning compressor for motor vehicles, with at least one piston, an essentially cylindrical piston shaft and an enclosure, which encloses a tilt ring or a tilt disc and a piston slipper sliding on said tilt ring or said tilt disc, whereby the enclosure has spherical recesses for housing the piston slipper.Type: ApplicationFiled: December 12, 2003Publication date: October 19, 2006Applicant: LUK FAHRZEUG-HYDRAULIK GMBH & CO. KGInventors: Volker Seipel, Willi Parsch, Georg Weber, Peter Barth, Henry Wittkopf, Peter Kuhn
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Patent number: 7118324Abstract: A CO2 compressor for an air conditioner of a motor vehicle is suggested having a sealing device, assigned to the driveshaft of the CO2 compressor, which is implemented as a sliding ring. The CO2 compressor features a lubrication device, in which the sealing device is supplied a lubricant flow effected by centrifugal forces.Type: GrantFiled: August 4, 2000Date of Patent: October 10, 2006Assignee: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Jan Hinrichs, Peter Kuhn, Frank Obrist
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Patent number: 7115038Abstract: A shaft-hub connection for transferring a torque between a shaft (1) and a hub (3) with the aid of at least one drive element (2). To enable a torque transfer which is practically resistant to wear, even under the effect of transversal forces, the contact surface between the shaft and the hub and/or between the shaft and the drive element and/or between the hub and the drive element is minimized in the axial direction thereof.Type: GrantFiled: December 5, 2003Date of Patent: October 3, 2006Assignee: LUK Fahrzeug-Hydraulik GmbH & Co. KGInventor: Ivo Agner
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Publication number: 20060207423Abstract: A reciprocating piston machine, in particular a compressor, such as for the air conditioning system of an automotive vehicle. The machine includes a casing and at least one casing cover. A working unit including pistons and is arranged or formed in the casing. The intake and exhaust zone or a front shaft bearing are arranged or formed in the casing cover (covers). The casing cover is screwed on the casing. The screw assembling is carried out with the aid of ring nuts or screw threads between the casing and the casing cover.Type: ApplicationFiled: July 3, 2003Publication date: September 21, 2006Applicant: LUK FAHRZEUG-HYDRAULIK GMBH & CO. KGInventors: Georg Weber, Jan Hinrichs
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Publication number: 20060153722Abstract: In a preferred embodiment of the present invention, a positive-displacement pump, in particular a vane cell pump, having a pump element, in particular a rotor, which is situated within a contour ring rotatable between two side surfaces where a limited coating is located on one of the side surfaces.Type: ApplicationFiled: December 12, 2005Publication date: July 13, 2006Applicant: LUK FAHRZEUG-HYDRAULIK GMBH & CO. KGInventors: Waldemar Hebisch, Markus Meitinger, Karl Prinzhorn, Dirk Webert
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Patent number: 7063464Abstract: A reciprocating piston mechanism for an air-conditioning compressor in a motor vehicle has a housing, a rotary driven shaft, a shaft seal assembly with a gliding ring seal, at least one radial shaft bearing, and at least one axial shaft bearing.Type: GrantFiled: July 30, 2003Date of Patent: June 20, 2006Assignee: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Georg Weber, Peter Barth
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Publication number: 20060124170Abstract: The invention relates to a compressor, particularly for air conditioners in motor vehicles, comprising a safety device for limiting high pressure, whereby the safety device is hermetically sealed until first responding, after which it slowly reduces the system pressure.Type: ApplicationFiled: October 31, 2003Publication date: June 15, 2006Applicant: LUK FAHRZEUG-HYDRAULIK GMBH & CO., KGInventors: Tilo Schaefer, Georg Weber, Thomas Di Vito, Jan Hinrichs, Uwe Becker, Willi Parsch, Bjoern Eagerli
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Patent number: 6953325Abstract: A safety device limits the pressure in an axial-piston compressor with variable piston displacement. The compressor has as wobble plate or swash plate whose tilt angle can be variably controlled by the pressure differential between the high pressure in the discharge pressure zone and the pressure in the piston-drive chamber. The safety device consists of a valve arranged in a connector channel between the discharge pressure zone and the pressure zone of the piston-drive chamber. When the discharge pressure exceeds a given pressure limit, the safety device responds by allowing an increased flow of pressure medium from the discharge pressure zone to the piston-drive chamber. The influx of pressure medium into the piston-drive chamber causes a reduction of the tilt angle of the swash plate or wobble plate.Type: GrantFiled: January 6, 2003Date of Patent: October 11, 2005Assignees: LuK Fahrzeug-Hydraulik GmbH & Co., KG, Behr GmbH & Co.Inventors: Georg Weber, Michael Sickelmann, Tilo Schäfer, Christoph Walter, Hans-Joachim Krauss, Harald Raiser, Frank Obrist
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Publication number: 20050204768Abstract: An air conditioning system is provided for heating and/or cooling a passenger compartment of a motor vehicle, the system including a compressor, wherein the one compressor powers at least two air conditioning circuits in at the same time (i.e., in parallel).Type: ApplicationFiled: February 20, 2003Publication date: September 22, 2005Applicant: LuK Fahrzeug-Hydraulik GmbH & Co.KGInventors: Thomas Di Vito, Georg Weber, Tilo Schaefer
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Patent number: 6928919Abstract: In a wobble plate piston-drive mechanism, the inclination of the ring-shaped wobble plate is adjustable through an articulated connection of the wobble plate to the shaft by means of an axially movable guiding device and a driver arm that reaches into an engagement cavity of the wobble plate at a radial distance from the shaft to transmit the driving force from the shaft to the wobble plate. The driver arm head and/or the engagement cavity are shaped so that the force-transmitting contact between the driver arm head and the annular wobble plate is moved away from the area where the engagement cavity has its minimum wall thickness. This prevents or reduces deformation of the gliding surface of the wobble plate and thus makes the mechanism run more smoothly.Type: GrantFiled: May 12, 2003Date of Patent: August 16, 2005Assignee: LuK Fahrzeug-Hydraulik GmbH & Co., KGInventor: Willi Parsch
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Publication number: 20050163631Abstract: A pump, particularly a vane pump or roller cell pump, whereby the vane pump or roller cell pump is provided with a two-stroke contour ring, with a rotor, inside of which vanes or rollers are mounted in a manner that enables them to be radially displaced, with at least one side side plate, which seals the rotating group, with a casing and with a casing cover, whereby the rotor is driven by a shaft and the shaft is mounted inside the casing and, optionally, inside the cover.Type: ApplicationFiled: December 20, 2002Publication date: July 28, 2005Applicant: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventors: Ivo Agner, Matthias Wendt
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Patent number: 6896786Abstract: A process for the production of wear-resistant, coated surfaces includes the use of at least two electrodes connected to a voltages source which are mounted in, or border, a reaction space through which an electrolyte flows in which the surface to be coated is located. The process is distinguished by the fact that the direction of the flow of the electrolyte is selectively reversed at least once during the coating process to enable better control of the formation of the oxide layer.Type: GrantFiled: September 14, 1999Date of Patent: May 24, 2005Assignee: LuK, Fahrzeug-Hydraulik GmbH & Co. KGInventors: Christof Lausser, Hans-Jürgen Lauth
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Patent number: 6886355Abstract: An air-conditioning system with a refrigerant medium circulating in a refrigerant loop has a variable-stroke compressor with a high-pressure outlet chamber, a drive chamber and an intake suction chamber. A first valve regulates a first flow of refrigerant medium from the high-pressure outlet chamber to the drive chamber, and a second valve regulates a second flow of refrigerant medium from the drive chamber to the intake suction chamber. The first and second valves operate independently of each other under the control of a control unit, and the variable stroke of the compressor is controlled by the first and/or second flow of refrigerant medium.Type: GrantFiled: May 21, 2003Date of Patent: May 3, 2005Assignee: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Frank Obrist, Tilo Schafer, Georg Weber
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Publication number: 20050028615Abstract: The invention relates to a method for determining the piston stroke of a reciprocating piston machine having a variable stroke, for example a swashplate compressor, a pivoting plate compressor or a pivoting ring compressor, especially for air-conditioning installations in motor vehicles.Type: ApplicationFiled: November 15, 2002Publication date: February 10, 2005Applicant: LUK FAHRZEUG- HYDRAULIK Gmbh & Co. KGInventors: Tilo Schaefer, Georg Weber
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Patent number: 6837689Abstract: A rotary vane pump for delivering a fluid and which has a housing which accommodates a rotatable delivery device (1) and which includes a feed channel (13) for receiving the fluid from a tank or the like. The feed channel communicates with a jet chamber (15) which in turn communicates via one or more suction channels (20) to at least two suction chambers which communicate with the intake region of the pump. An injector device (14) injects a pressurized fluid into the jet chamber to entrain and advance the fluid entering from the feed channel (13), and means are provided for influencing the flow of the fluid so as to achieve essentially the same volume flow into the two suction chambers.Type: GrantFiled: January 27, 2003Date of Patent: January 4, 2005Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventors: Nguyen van Doan, Waldemar Hebisch