Patents Assigned to Luk Fahrzeug-Hydraulik GmbH & Co. KG
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Patent number: 8353681Abstract: A compressor, such as an air-conditioning compressor for motor vehicles, particularly with a drive which has an adjustable swept volume, for the intake and compression of a refrigerant and a lubricant separator, which separates lubricant from the refrigerant, in particular, in the discharge pressure region of the compressor. The lubricant is introduced to the drive by a partial flow branching off from the high pressure refrigerant flow.Type: GrantFiled: August 5, 2005Date of Patent: January 15, 2013Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventors: Jan Hinrichs, Thomas Di Vito
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Patent number: 8322270Abstract: A reciprocating piston machine, such as an air-conditioning compressor for motor vehicles, having a housing, a rotationally drivable shaft, a shaft sealing device, in particular a mechanical shaft seal, at least one radial shaft bearing, especially a radial rolling-contact bearing, and at least one axial shaft bearing, in particular an axial rolling-contact bearing, a bearing sleeve which accommodates at least the radial shaft bearing, being configured within an opening in the housing, extending into the same.Type: GrantFiled: October 20, 2005Date of Patent: December 4, 2012Assignee: LUK Fahrzeug-Hydraulik GmbH & Co. KGInventor: Jan Hinrichs
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Patent number: 8235163Abstract: A hydraulic steering assistance system for vehicles, including a power steering pump and a variable-ratio gear, particularly a booster drive for the power-steering pump wherein the power steering pump hydraulically powers both the hydraulic steering assistance system and the variable-ratio gear.Type: GrantFiled: August 18, 2005Date of Patent: August 7, 2012Assignee: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Dirk Webert, Doan Van Nguyen
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Patent number: 8197239Abstract: A pump, especially a power-steering pump, having a flow-control valve device that has a piston arranged inside a piston bore so as to be displaced. The piston bore has at least one inlet and at least one outlet channel. The piston has an axial inlet opening and a plurality of substantially radial outlet openings as well as a continuous outlet groove between a first collar and a second collar, representing a control edge for an outlet fluid flow. The axial inlet opening extends at least to the beginning of the radial, lateral outlet openings in a substantially cylindrical manner and the continuous outlet groove widens in terms of its radial depth on the outer circumference of the piston towards the control edge.Type: GrantFiled: February 17, 2005Date of Patent: June 12, 2012Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventor: Anwar Abumustafa
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Patent number: 8066497Abstract: 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 and rotatable between two side surfaces where a limited coating is located on at least one of the side surfaces.Type: GrantFiled: December 12, 2005Date of Patent: November 29, 2011Assignee: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Waldemar Hebisch, Markus Meitinger, Karl Prinzhorn, Dirk Webert
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Patent number: 7922469Abstract: 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: GrantFiled: June 19, 2004Date of Patent: April 12, 2011Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventor: Ivo Agner
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Patent number: 7874309Abstract: 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: GrantFiled: October 31, 2003Date of Patent: January 25, 2011Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventors: Tilo Schaefer, Georg Weber, Thomas Di Vito, Jan Hinrichs, Uwe Becker, Willi Parsch, Bjoern Fagerli
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Patent number: 7698989Abstract: 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 saw tooth screw threads between the casing and the casing cover, wherein the casing and cover are made of materials with different strengths and different thermal expansion coefficients.Type: GrantFiled: July 3, 2003Date of Patent: April 20, 2010Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventors: Georg Weber, Jan Hinrichs
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Patent number: 7587970Abstract: A reciprocating piston machine, such as an air-conditioning compressor for motor vehicles, including a pivot ring and a guide sleeve that is provided axially slidably on a drive shaft and is provided with radially projecting bearing sleeves. The pivot ring and the guide sleeve are interconnected by pins so as to be rotatable relative to each other while being axially joined in a fixed manner, the pins being mounted in bores of the pivot ring and in bores of the bearing sleeves of the guide sleeve.Type: GrantFiled: October 20, 2005Date of Patent: September 15, 2009Assignee: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Jan Hinrichs, Andre Speck, Peter Barth
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Patent number: 7520732Abstract: 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: GrantFiled: December 20, 2002Date of Patent: April 21, 2009Assignee: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Ivo Agner, Matthias Wendt
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Patent number: 7500425Abstract: 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: GrantFiled: December 12, 2003Date of Patent: March 10, 2009Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventors: Volker Seipel, Willi Parsch, Georg Weber, Peter Barth, Henry Wittkopf, Peter Kuhn
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Publication number: 20080223210Abstract: A reciprocating piston machine, such as an air-conditioning compressor for motor vehicles, having a housing, a a rotationally drivable shaft, a shaft sealing device, in particular a mechanical shaft seal, at least one radial shaft bearing, especially a radial rolling-contact bearing, and at least one axial shaft bearing, in particular an axial rolling-contact bearing, a bearing sleeve which accommodates at least the radial shaft bearing, being configured within an opening in the housing, extending into the same.Type: ApplicationFiled: October 20, 2005Publication date: September 18, 2008Applicant: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventor: Jan Hinrichs
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Patent number: 7351046Abstract: 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: August 21, 2006Date of Patent: April 1, 2008Assignee: Luk Fahrzeug-Hydraulik GmbH & Co. KGInventor: Ivo Agner
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Publication number: 20080034783Abstract: A compressor, such as an air-conditioning compressor for motor vehicles, particularly with a drive which has an adjustable swept volume, for the intake and compression of a refrigerant and a lubricant separator, which separates lubricant from the refrigerant, in particular, in the discharge pressure region of the compressor. The lubricant is introduced to the drive by a partial flow branching off from the high pressure refrigerant flow.Type: ApplicationFiled: August 5, 2005Publication date: February 14, 2008Applicant: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Jan Hinrichs, Thomas Di Vito
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Publication number: 20080031745Abstract: An axial piston machine, in particular to an air-conditioning compressor for motor vehicles, including a drive unit for taking-in and compressing a pressure medium The drive unit is rotatably driven by a shaft, the rotatable movement of the shaft is convertible into the reciprocating motion of the pistons in the drive unit and the shaft is mounted in the casing of the axial piston machine, in particular by an axial bearing.Type: ApplicationFiled: November 9, 2005Publication date: February 7, 2008Applicant: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventor: Uwe Becker
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Patent number: 7302806Abstract: In a motor vehicle with a combustion engine, an electronic engine-management device, and an air-conditioning system with an air-conditioning control device, the air-conditioning compressor has reciprocating pistons whose displacement stroke is adjustable through one or more control valves. The electronic engine-management device has direct access to and priority control over the adjustment of the piston stroke, so that the electronic engine management device takes precedence over the air-conditioning control device in controlling the adjustment of the piston stroke.Type: GrantFiled: June 12, 2003Date of Patent: December 4, 2007Assignee: Luk Fahrzeug-Hydraulik GmbH & Co., KGInventors: Willi Parsch, Frank Rinne
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Publication number: 20070264136Abstract: A reciprocating piston machine, such as an air-conditioning compressor for motor vehicles, including a pivot ring and a guide sleeve that is provided axially slidably on a drive shaft and is provided with radially projecting bearing sleeves. The pivot ring and the guide sleeve are interconnected by pins so as to be rotatable relative to each other while being axially joined in a fixed manner, the pins being mounted in bores of the pivot ring and in bores of the bearing sleeves of the guide sleeve.Type: ApplicationFiled: October 20, 2005Publication date: November 15, 2007Applicant: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Jan Hinrichs, Andre Speck, Peter Barth
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Publication number: 20070251754Abstract: A hydraulic steering assistance system for vehicles, including a power steering pump and a variable-ratio gear, particularly a booster drive for the power-steering pump wherein the power steering pump hydraulically powers both the hydraulic steering assistance system and the variable-ratio gear.Type: ApplicationFiled: August 18, 2005Publication date: November 1, 2007Applicant: LuK Fahrzeug-Hydraulik GmbH & Co. KGInventors: Dirk Webert, Doan Van Nguyen
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Publication number: 20070243080Abstract: A pump, especially a power-steering pump, having a flow-control valve device that has a piston arranged inside a piston bore so as to be displaced. The piston bore has at least one inlet and at least one outlet channel. The piston has an axial inlet opening and a plurality of substantially radial outlet openings as well as a continuous outlet groove between a first collar and a second collar, representing a control edge for an outlet fluid flow. The axial inlet opening extends at least to the beginning of the radial, lateral outlet openings in a substantially cylindrical manner and the continuous outlet groove widens in terms of its radial depth on the outer circumference of the piston towards the control edge.Type: ApplicationFiled: February 17, 2005Publication date: October 18, 2007Applicant: LUK FAHRZEUG-HYDRAULIK GMBH & CO. KGInventor: Anwar Abumustafa
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Patent number: 7273004Abstract: The radial piston or reciprocating engine (1) has annularly juxtaposed, radially directed piston-cylinder units (2, 3). The outward stroke of the pistons (2) is controlled by the cam (11) of a common eccentric shaft (12), whereas the inward stroke thereof is controlled by a control ring (16), which engages in a lateral recess (17) of each piston (2) running in the direction of a secant and adapted to a cross-sectional shape of the control ring (16). The recess (17) is then bounded by a base wall of the piston (2) with which the control ring (16) is in controlling sliding contact via an inner control face (20). The pistons (2) are hollow and carry on their face the diaphragm of a diaphragm valve. Thus, the reciprocating engine (1) has a particularly compact construction and can be highly loaded, so that it is particularly suitable as a compressor of a CO2 vehicle air conditioning system.Type: GrantFiled: December 3, 2004Date of Patent: September 25, 2007Assignees: Luk Fahrzeug-Hydraulik GmbH & Co. KG, Visteon Global Technologies, Inc., Obrist Engineering GmbHInventor: Peter Kuhn