Patents by Inventor Stefan Loheide
Stefan Loheide has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10605323Abstract: An elastomer bearing has an inner part, an outer sleeve that surrounds the inner part, and an elastomer body that is arranged between the inner part and the outer sleeve. The elastomer body extends from the inner part as far as the outer sleeve. The elastomer body comprises two liquid chambers, which are filled with a liquid and arranged one on top of the other in an axial direction, and a duct carrier arranged radially between the elastomer body and the outer sleeve. The duct carrier surrounds the elastomer body in a region of the liquid chambers and bounds the chambers. The elastomer body is vulcanized to the inner part. To reinforce the elastomer body, two, annular reinforcement inlays are embedded in the elastomer body, and form parts, separate from one another, of a cage that is embedded in the elastomer body.Type: GrantFiled: January 25, 2017Date of Patent: March 31, 2020Assignees: Ford-Werke GmbH, Boge Elastmetall GmbHInventors: Frank Wittbracht, Josef Burwinkel, Stefan Loheide, Achim Lordick, Thomas Schmitz, Marc Mendel
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Publication number: 20190040928Abstract: An elastomer bearing has an inner part, an outer sleeve that surrounds the inner part, and an elastomer body that is arranged between the inner part and the outer sleeve. The elastomer body extends from the inner part as far as the outer sleeve. The elastomer body comprises two liquid chambers, which are filled with a liquid and arranged one on top of the other in an axial direction, and a duct carrier arranged radially between the elastomer body and the outer sleeve. The duct carrier surrounds the elastomer body in a region of the liquid chambers and bounds the chambers. The elastomer body is vulcanized to the inner part. To reinforce the elastomer body, two, annular reinforcement inlays are embedded in the elastomer body, and form parts, separate from one another, of a cage that is embedded in the elastomer body.Type: ApplicationFiled: January 25, 2017Publication date: February 7, 2019Applicants: BOGE ELASTMETALL GMBH, FORD-WERKE GMBHInventors: Frank WITTBRACHT, Josef BURWINKEL, Stefan LOHEIDE, Achim LORDICK, Thomas SCHMITZ, Marc MENDEL
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Patent number: 9822839Abstract: A hydraulically damping rubber bearing has a substantially hollow-cylindrical inner portion and an outer portion disposed with a predetermined spacing relative to the inner portion. A resilient connection portion is disposed between the inner portion and the outer portion and connects the outer portion to the inner portion. The resilient connection portion has a first hydraulic damping circuit with at least two first fluid chambers which are in fluid communication with each other by means of a first flow connection. The first hydraulic damping circuit has a damping action in a predetermined direction. A second hydraulic damping circuit provides a damping action in the same predetermined direction as the first hydraulic damping circuit.Type: GrantFiled: April 30, 2014Date of Patent: November 21, 2017Assignees: BOGE ELASTMETALL GMBH, AUDI AGInventors: Volker Ludwig, Stefan Loheide, Thomas Conrad, Wolfgang Unger
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Patent number: 9599156Abstract: A sleeve bearing for being received in an outer sleeve includes an inner part which extends in the axial direction, a bearing body, and a cage which encloses the bearing body circumferentially. The bearing body encloses the inner part, is made from an elastic material, and has at least two chambers. The cage is formed from at least two cage parts, the spacing of which can be varied in the radial direction. A sealed joint area is provided between the cage parts.Type: GrantFiled: July 1, 2013Date of Patent: March 21, 2017Assignees: BOGE ELASTMETALL GMBH, AUDI AGInventors: Volker Ludwig, Stefan Loheide, Thomas Conrad
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Publication number: 20160195155Abstract: A hydraulically damping rubber bearing has a substantially hollow-cylindrical inner portion and an outer portion disposed with a predetermined spacing relative to the inner portion. A resilient connection portion is disposed between the inner portion and the outer portion and connects the outer portion to the inner portion. The resilient connection portion has a first hydraulic damping circuit with at least two first fluid chambers which are in fluid communication with each other by means of a first flow connection. The first hydraulic damping circuit has a damping action in a predetermined direction. A second hydraulic damping circuit provides a damping action in the same predetermined direction as the first hydraulic damping circuit.Type: ApplicationFiled: April 30, 2014Publication date: July 7, 2016Applicants: BOGE Elastmetall GmbH, Audi AGInventors: Volker Ludwig, Stefan Loheide, Thomas Conrad, Wolfgang Unger
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Publication number: 20150226258Abstract: A sleeve bearing for being received in an outer sleeve includes an inner part which extends in the axial direction, a bearing body, and a cage which encloses the bearing body circumferentially. The bearing body encloses the inner part, is made from an elastic material, and has at least two chambers. The cage is formed from at least two cage parts, the spacing of which can be varied in the radial direction. A sealed joint area is provided between the cage parts.Type: ApplicationFiled: July 1, 2013Publication date: August 13, 2015Inventors: Volker Ludwig, Stefan Loheide, Thomas Conrad
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Patent number: 8807543Abstract: A bearing body (2) is divided in the radial direction (r) by at least one insert (6) arranged in the bearing body (2) parallel to the bearing axis (12) into at least two spring packets (7, 8) having an outer switching packet (8). Each of the working chambers (4, 4?) is divided into several chamber sections (91-9n) extending in the radial direction (r) and into at least one chamber section (10) extending in the axial direction (a) and connecting the chamber sections (91-9n) with one another. The elastomeric bearing body (2) is segmented in the switching packet (8) in the axial direction (a) by the chamber sections (91-9n) protruding into the elastomeric bearing body (2).Type: GrantFiled: March 15, 2010Date of Patent: August 19, 2014Assignee: Audi AGInventors: Stefan Loheide, Hubert Siemer, Thomas Conrad
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Publication number: 20120038093Abstract: The invention provides a bearing body (2) which is divided in the radial direction (r) by at least one insert (6) arranged in the bearing body (2) parallel to the bearing axis (12) into at least two spring packets (7, 8) having an outer switching packet (8). Each of the working chambers (4, 4?) is divided into several chamber sections (91-9n) extending in the radial direction (r) and into at least one chamber section (10) extending in the axial direction (a) and connecting the chamber sections (91-9n) with one another. The elastomeric bearing body (2) is segmented in the switching packet (8) in the axial direction (a) by the chamber sections (91-9n) protruding into the elastomeric bearing body (2).Type: ApplicationFiled: March 15, 2010Publication date: February 16, 2012Applicants: AUDI AG, ZF FRIEDRICHSHAFEN AGInventors: Stefan Loheide, Hubert Siemer, Thomas Conrad
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Patent number: 8100235Abstract: A controllable hydraulic bearing for damping vibrations in a defined frequency band is proposed, which includes an elastomeric body (1), two chambers which are filled with a magneto-rheological fluid and connected with one another by at least one channel (2), with the chambers having at least partially flexible chamber walls, wherein the buckling spring rate of the chamber walls represents a measure for a pressure change due to the volume displacement between the chambers, and at least one electromagnet which generates a magnetic field in the region of the channel (2). According to the invention, the magnetic field in the region of the channel (2) is an inhomogeneous magnetic field.Type: GrantFiled: August 8, 2008Date of Patent: January 24, 2012Assignee: ZF Friedrichshafen AGInventors: Stefan Loheide, Hubert Siemer, Burkhard Meyer, Josef Burwinkel
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Publication number: 20110221153Abstract: A linking rod for a vehicle comprising a basic body (2). The basic body (2) comprises a bearing housing (3) and a joint housing (4) which are spaced apart from one another by a coupling piece (9) of the basic body (2). The bearing housing (3), of the basic body (2). is formed from a first plastic material which is surrounded by an enclosure (7) which is made from a second plastic material that is softer than the first plastic material.Type: ApplicationFiled: July 30, 2008Publication date: September 15, 2011Applicant: ZF FRIEDRICHSHAFEN AGInventors: Ulrich Bladt, Olaf Beutler, Günter Lohfink, Karl-Walter Palluck, Stefan Loheide, Dirk Lamla, Stefan Schönhoff, Christian Maassmann
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Patent number: 7703753Abstract: The invention relates to a stop element (1) for a hydraulic bearing and a hydraulic bushing equipped therewith. The proposed hydraulic stop element (1) with a stop body (2, 2?) and a stop surface (3) is implemented as a piston-cylinder-assembly with an elastomeric bearing (12) with at least two work chambers for a fluidic damping means. The cylinder (4) of this piston-cylinder-assembly is inserted into the solid material surrounding the outer surface of a metallic element of the elastomeric support (12) which delimits the corresponding work chamber (16, 16?) of the elastomeric bearing (12) perpendicular to the main load direction (r). A piston (2, 2?) which forms the stop body with a stop surface (3) is movably guided in the cylinder (4) in the main load direction (r) of the elastomeric bearing.Type: GrantFiled: November 10, 2008Date of Patent: April 27, 2010Assignee: ZF Friedrichsafen AGInventors: Hubert Siemer, Stefan Loheide
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Patent number: 7694945Abstract: A hydraulically damping elastomer bearing has at least one housing (1, 2), a connection element (3), an elastomer body (4), which couples the housing (1, 2) and the connection element (3) with one another in a vibration-damping manner. Two chambers (5, 6) filled with a fluid are provided as well as at least one flow channel (8), which connects the chambers (5, 6) to one another. A recess (9) in the housing (1, 2) is associated with the flow channel (8). A valve (10) is present in the recess (9) for opening and closing the flow channel (8). An actuator (11) is provided for actuating the valve (10) on the outside of the housing (1, 2). The valve (10) includes an elastic diaphragm (12), in which an insert (13) is embedded.Type: GrantFiled: March 7, 2007Date of Patent: April 13, 2010Assignee: ZF Friedrichshafen AGInventors: Stefan Loheide, Hubert Siemer, Burkhard Meyer
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Patent number: 7669700Abstract: An elastomer bearing with hydraulic damping is disclosed which includes a housing (1, 2), a connecting element (3), an elastomer body (4) which couples the housing (1, 2) and the connecting element (3) with one another for damping oscillations, two chambers (5, 6) filled with a magneto-rheological fluid, at least one flow channel (8) connecting the chambers (5, 6) with one another for fluid conduction, as well as an actuator (11) associated with the flow channel and attached on the outside of the housing (1, 2) for generating a magnetic field. According to the invention, a field return element (10) with interacts with the actuator is arranged on or in the flow channel (8).Type: GrantFiled: April 4, 2007Date of Patent: March 2, 2010Assignee: ZF Friedrichshafen AGInventors: Stefan Loheide, Hubert Siemer, Burkhard Meyer
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Publication number: 20090140478Abstract: The invention relates to a stop element (1) for a hydraulic bearing and a hydraulic bushing equipped therewith. The proposed hydraulic stop element (1) with a stop body (2, 2?) and a stop surface (3) is implemented as a piston-cylinder-assembly with an elastomeric bearing (12) with at least two work chambers for a fluidic damping means. The cylinder (4) of this piston-cylinder-assembly is inserted into the solid material surrounding the outer surface of a metallic element of the elastomeric support (12) which delimits the corresponding work chamber (16, 16?) of the elastomeric bearing (12) perpendicular to the main load direction (r). A piston (2, 2?) which forms the stop body with a stop surface (3) is movably guided in the cylinder (4) in the main load direction (r) of the elastomeric bearing.Type: ApplicationFiled: November 10, 2008Publication date: June 4, 2009Inventors: Hubert SIEMER, Stefan LOHEIDE
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Publication number: 20090057968Abstract: A controllable hydraulic bearing for damping vibrations in a defined frequency band is proposed, which includes an elastomeric body (1), two chambers which are filled with a magneto-rheological fluid and connected with one another by at least one channel (2), with the chambers having at least partially flexible chamber walls, wherein the buckling spring rate of the chamber walls represents a measure for a pressure change due to the volume displacement between the chambers, and at least one electromagnet which generates a magnetic field in the region of the channel (2). According to the invention, the magnetic field in the region of the channel (2) is an inhomogeneous magnetic field.Type: ApplicationFiled: August 8, 2008Publication date: March 5, 2009Applicant: ZF FriedrichshafenInventors: Stefan Loheide, Hubert Siemer, Burkhard Meyer, Josef Burwinkel
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Patent number: 7441757Abstract: A hydraulically damping bush bearing (1) has an inner part (1) with a hole (3) extending along a longitudinal axis (4); an outer sleeve (9) surrounding the inner part (2); an elastomeric damping member (6) arranged between the inner part (2) and the outer sleeve (9); and at least two chamber pairs (21, 24) with at least two separate chambers (19, 20; 22, 23) each, which are filled with a hydraulic fluid.Type: GrantFiled: December 9, 2004Date of Patent: October 28, 2008Assignee: ZF Friedrichshafen AGInventors: Hubert Siemer, Josef Burwinkel, Stefan Loheide, Burkhard Meyer
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Patent number: 7392976Abstract: A hydraulically damping bush bearing is provided with hydraulic area formed from at least two chamber pairs, wherein each chamber pair is formed from at least two separate chambers, which are connected to one another via at least one damping channel. The hydraulically damping bearing with damping in both the axial direction and the radial direction is further improved to the effect that damping or stiffness that can be switched off or on depending on the operating state is also made possible. The hydraulically damping bush bearing (1) chambers (19, 20; 22, 23) of the chamber pairs (21, 24) can be connected via a closable chamber wall opening (40).Type: GrantFiled: December 9, 2004Date of Patent: July 1, 2008Assignees: ZF Friedrichshafen AG, Audi AGInventors: Hubert Siemer, Josef Burwinkel, Stefan Loheide, Burkhard Meyer
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Publication number: 20070296131Abstract: An impact damper (7) with at least one damper unit (8, 9, 10, 11). The damper unit (8, 9, 10, 11) includes at least one elastomer spring element (15), at least one fluid-filled primary chamber (24), and at least one fluid-filled secondary chamber (27), as well as one nozzle opening (26) connecting the two chambers (24, 27), wherein the fluid can be displaced during spring deflection of the elastomer spring element (15) from the primary chamber (24) into the secondary chamber (27). The impact damper (7) includes a damper unit (8, 9, 10, 11) has the shape of a rotational toroidal or an annular body. The impact damper of the invention is suitable, in particular, for high-end damping applications, for example the wheel suspension of automobiles, and more particularly for overcoming such divergent requirements as an early force buildup, a uniform energy dissipation with a long stroke, and a high energy absorption.Type: ApplicationFiled: June 8, 2007Publication date: December 27, 2007Applicant: ZF FRIEDRICHSHAFEN AGInventors: Hubert SIEMER, Stefan LOHEIDE, Josef BURWINKEL
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Publication number: 20070292063Abstract: A process for manufacturing an elastomer bearing is provided as well as a bush bearing as well as a device for manufacturing a corresponding bush bearing. Elastomer bearings of a compact design are obtained, in which a prestress of a predetermined value can be generated in the elastomer bearing body during the manufacturing process in a simple manner. In particular, the manufacture of bush bearings with high radial rigidity, which have a favorable characteristic against cardanic and torsional loads and preferably meet high requirements on the pressing-out force, is made possible.Type: ApplicationFiled: November 11, 2005Publication date: December 20, 2007Inventors: Stefan Loheide, Ulrich Bladt, Gunter Lohfink, Eckhard Jantzen
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Publication number: 20070273073Abstract: A hydraulically damping bush bearing is provided with hydraulic area formed from at least two chamber pairs, wherein each chamber pair is formed from at least two separate chambers, which are connected to one another via at least one damping channel. The hydraulically damping bearing with damping in both the axial direction and the radial direction is further improved to the effect that damping or stiffness that can be switched off or on depending on the operating state is also made possible. The hydraulically damping bush bearing (1) chambers (19, 20; 22, 23) of the chamber pairs (21, 24) can be connected via a closable chamber wall opening (40).Type: ApplicationFiled: December 9, 2004Publication date: November 29, 2007Inventors: Hubert Siemer, Josef Burwinkel, Stefan Loheide, Burkhard Meyer