Patents by Inventor Hans Gonschorrek
Hans Gonschorrek 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: 9951839Abstract: A preloading device for a piston valve of a vibration damper includes a spring element which is fitted by an inner diameter onto a radially inner centering device which serves for inner centering of the spring element in the installed state of the preloading device. To provide a preloading device for a piston valve by which a reliable inner centering of a spring element can be ensured but which can be placed with low expenditure on assembly at the same time, the spring element is axially fixed at the centering device via retaining means in that the retaining means at least partially enclose the spring element axially on both sides and are rigidly connected to the centering device in each instance.Type: GrantFiled: December 17, 2014Date of Patent: April 24, 2018Assignee: ZF Friedrichshafen AGInventors: Helmut Baalmann, Hassan Asadi, Hans Gonschorrek, Lothar Krill, Alexander Kruse, Oswald Lichtlein, Dirk Litterscheid, Thomas Manger, Heinz Sydekum, Harun Tucovic
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Publication number: 20170009839Abstract: A vibration damper includes a piston rod (2) which transitions into a piston rod neck (4) while forming a contact shoulder (6) and guides a piston valve (1) at this piston rod neck (4), this piston valve (1) is pretensioned against the contact shoulder (6) of the piston rod (2). To reduce variances in damping force in batch fabrication of the vibration damper, a compensating disk (20) is fitted axially between the contact shoulder (6) and the piston valve (1), which compensating disk (20) is produced from a material with a lower yield strength compared to the piston rod (2) and/or compared to an immediately succeeding component of the piston valve (1).Type: ApplicationFiled: December 17, 2014Publication date: January 12, 2017Applicant: ZF Friedrichshafen AGInventors: Helmut BAALMANN, Hassan ASADI, Hans GONSCHORREK, Lothar KRILL, Alexander KRUSE, Oswald LICHTLEIN, Dirk LITTERSCHEID, Thomas MANGER, Harun TUCOVIC, Heinz SYDEKUM
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Publication number: 20170002887Abstract: A preloading device for a piston valve of a vibration damper includes a spring element which is fitted by an inner diameter onto a radially inner centering device which serves for inner centering of the spring element in the installed state of the preloading device. To provide a preloading device for a piston valve by which a reliable inner centering of a spring element can be ensured but which can be placed with low expenditure on assembly at the same time, the spring element is axially fixed at the centering device via retaining means in that the retaining means at least partially enclose the spring element axially on both sides and are rigidly connected to the centering device in each instance.Type: ApplicationFiled: December 17, 2014Publication date: January 5, 2017Inventors: Helmut BAALMANN, Hassan ASADI, Hans GONSCHORREK, Lothar KRILL, Alexander KRUSE, Oswald LICHTLEIN, Dirk LITTERSCHEID, Thomas MANGER, Heinz SYDEKUM, Harun TUCOVIC
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Patent number: 8393447Abstract: A vibration damper includes a damping medium filled cylinder in which a piston rod carrying a working piston is guided with freedom of axial movement, the working piston dividing the cylinder into two working spaces. The piston rod forms a housing having an inside wall, the housing having first and second working chambers separated by a separating piston, the first working chamber being connected to one of the working spaces to provide amplitude selective damping as the working piston moves in the cylinder. The separating piston is spaced from the inside wall to form an annular gap in which a pressure gradient develops when the piston rod moves, thereby causing the separating piston to move in the housing, the separating piston being radially expandable to close the gap when sufficient pressure develops in one of the working chambers.Type: GrantFiled: March 19, 2008Date of Patent: March 12, 2013Assignee: ZF Friedrichafen AGInventors: Wolfgang Breun, Marcus Kirchner, Hans Gonschorrek, Valentin Harwardt
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Patent number: 8109491Abstract: A vibration damper, comprising a damping medium-filled cylinder, in which a piston rod is guided with freedom of axial movement, where, inside a working space in the cylinder, a stop spring in the form of a circular ring is located, which, after the piston rod has reached a defined stroke position, is compressed between a stop surface on the piston rod side and an end surface forming an axial boundary of the working space, and where the stop spring also forms a boundary of a radially inner space, which is connected to the working space outside the stop spring by means of at least one radial channel. The stop surface on the piston rod side and/or the axially limiting end surface is formed by a rigid body and is provided with at least one radial channel, which extends from the radially inner space to the radially outer working space, “inner” and “outer” being defined with respect to the stop spring.Type: GrantFiled: December 15, 2006Date of Patent: February 7, 2012Assignee: ZF FriedrichshafenInventors: Günther Handke, Hans Gonschorrek
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Publication number: 20080230334Abstract: A vibration damper includes a damping medium filled cylinder in which a piston rod carrying a working piston is guided with freedom of axial movement, the working piston dividing the cylinder into two working spaces. The piston rod forms a housing having an inside wall, the housing having first and second working chambers separated by a separating piston, the first working chamber being connected to one of the working spaces to provide amplitude selective damping as the working piston moves in the cylinder. The separating piston is spaced from the inside wall to form an annular gap in which a pressure gradient develops when the piston rod moves, thereby causing the separating piston to move in the housing, the separating piston being radially expandable to close the gap when sufficient pressure develops in one of the working chambers.Type: ApplicationFiled: March 19, 2008Publication date: September 25, 2008Applicant: ZF Friedrichshafen AGInventors: Wolfgang Breun, Marcus Kirchner, Hans Gonschorrek, Valentin Harwardt
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Publication number: 20070138721Abstract: A vibration damper, comprising a damping medium-filled cylinder, in which a piston rod is guided with freedom of axial movement, where, inside a working space in the cylinder, a stop spring in the form of a circular ring is located, which, after the piston rod has reached a defined stroke position, is compressed between a stop surface on the piston rod side and an end surface forming an axial boundary of the working space, and where the stop spring also forms a boundary of a radially inner space, which is connected to the working space outside the stop spring by means of at least one radial channel. The stop surface on the piston rod side and/or the axially limiting end surface is formed by a rigid body and is provided with at least one radial channel, which extends from the radially inner space to the radially outer working space, “inner” and “outer” being defined with respect to the stop spring.Type: ApplicationFiled: December 15, 2006Publication date: June 21, 2007Inventors: Gunther Handke, Hans Gonschorrek
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Patent number: 7172058Abstract: Vibration damper with amplitude-dependent damping force includes a cylinder, in which a piston rod, carrying a piston, is guided with freedom of axial movement, where the piston divides the cylinder into a working space on the piston rod side and a working space on the side away from the piston rod. The piston rod carries at least part of a housing, which is mounted in the direction of the piston rod-side working space, and where a separating body is supported inside the housing with freedom to slide. The separating body divides the housing into first and second working chambers, where the first working chamber is connected by at least one radial connecting opening to the piston rod-side working space and the second working chamber is connected by a connecting channel to the working space on the side away from the piston rod. At least a part of the housing is connected to the piston rod by a weld.Type: GrantFiled: November 19, 2004Date of Patent: February 6, 2007Assignee: ZF Friedrichshafen AGInventors: Gunnar Burkert, Andreas Förster, Heinz-Joachim Gilsdorf, Hans Gonschorrek, Frank MacKert, Thomas Kiefer, Klaus Sauer
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Publication number: 20050109571Abstract: Vibration damper with amplitude-dependent damping force includes a cylinder, in which a piston rod, carrying a piston, is guided with freedom of axial movement, where the piston divides the cylinder into a working space on the piston rod side and a working space on the side away from the piston rod. The piston rod carries at least part of a housing, which is mounted in the direction of the piston rod-side working space, and where a separating body is supported inside the housing with freedom to slide. The separating body divides the housing into first and second working chambers, where the first working chamber is connected by at least one radial connecting opening to the piston rod-side working space and the second working chamber is connected by a connecting channel to the working space on the side away from the piston rod. At least a part of the housing is connected to the piston rod by a weld.Type: ApplicationFiled: November 19, 2004Publication date: May 26, 2005Inventors: Gunnar Burkert, Andreas Forster, Heinz-Joachim Gilsdorf, Hans Gonschorrek, Frank MacKert, Thomas Kiefer, Klaus Sauer