Patents by Inventor Alfred Preukschat

Alfred Preukschat 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).

  • Patent number: 8651251
    Abstract: A regulable dashpot with shock-absorption force controls, especially intended for motor vehicles, with at least one flow-regulating system including one or more shock-absorption components for the compression phase and/or for the decompression phase. The object is to allow the dashpot to shift continuously between the hard and soft phases, whereby the valve-adjustment intervals can be varied at intervals that are not unnecessarily short or even unattainable. At least one valve assembly is accordingly supplied with variable flow impedance by regulating valve.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: February 18, 2014
    Assignee: ThyssenKrupp Bilstein Suspension GmbH
    Inventors: Alfred Preukschat, Jurgen Adamek
  • Publication number: 20120305354
    Abstract: A regulable dashpot with shock-absorption force controls, especially intended for motor vehicles, with at least one flow-regulating system including one or more shock-absorption components for the compression phase and/or for the decompression phase. The object is to allow the dashpot to shift continuously between the hard and soft phases, whereby the valve-adjustment intervals can be varied at intervals that are not unnecessarily short or even unattainable. At least one valve assembly is accordingly supplied with variable flow impedance by regulating valve.
    Type: Application
    Filed: August 16, 2012
    Publication date: December 6, 2012
    Applicant: THYSSENKRUPP BILSTEIN SUSPENSION GMBH
    Inventors: Alfred PREUKSCHAT, Jurgen ADAMEK
  • Patent number: 8052161
    Abstract: A wheel suspension for a motor vehicle has a transverse control arm that can be attached to a vehicle body by way of bearings and a spring-elastic torsion bar assembly, and can be rotated about a longitudinal axis. The torsion bar assembly has a body spring that can be attached to the vehicle body with one end, and a transverse control arm spring that is attached to the transverse control arm with one end. The body spring and the transverse control arm spring are coupled with one another at their free ends. The transverse control arm spring and the body spring are coupled with one another by way of a setting element or a releasable connection, whereby the setting element or the releasable connection, respectively, allows rotation of the ends assigned to one another, for setting purposes.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: November 8, 2011
    Assignees: ThyssenKrupp Bilstein Suspension GmbH, ThyssenKrupp Presta München/Esslingen GmbH
    Inventors: Alfred Preukschat, Thomas Brendecke, Luitpold Miller, Siegfried Ellmann
  • Patent number: 8006989
    Abstract: A wheel suspension for a motor vehicle has a transverse control arm that can be attached to a vehicle body by way of bearings and can be rotated about a longitudinal axis, and a body spring configured as a torsion bar spring for absorbing rotational movements of the transverse control arm about the longitudinal axis. The body spring is disposed on the transverse control arm so as to rotate with it, with a first end. An electromechanical actuator for changing the angle of rotation of the body spring is disposed at a second end of the body spring. The wheel suspension has a damping element. The second end of the body spring is connected with a stress relief spring that is configured as a torsion bar spring, disposed coaxially with the body spring, and can be attached to the vehicle body.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: August 30, 2011
    Assignees: ThyssenKrupp Bilstein Suspension GmbH, ThyssenKrupp Presta München/Esslingen GmbH
    Inventors: Alfred Preukschat, Thomas Brendecke, Luitpold Miller, Siegfried Ellmann
  • Publication number: 20100155186
    Abstract: A regulable dashpot with shock-absorption force controls, especially intended for motor vehicles, with at least one flow-regulating system including one or more shock-absorption components for the compression phase and/or for the decompression phase. The object is to allow the dashpot to shift continuously between the hard and soft phases, whereby the valve-adjustment intervals can be varied at intervals that are not unnecessarily short or even unattainable. At least one valve assembly is accordingly supplied with variable flow impedance by regulating valve.
    Type: Application
    Filed: March 3, 2010
    Publication date: June 24, 2010
    Applicant: ThyssenKrupp Bilstein Suspension GMBH
    Inventors: Alfred PREUKSCHAT, Jürgen ADAMEK
  • Patent number: 7699147
    Abstract: A regulable dashpot with shock-absorption force controls, especially intended for motor vehicles, with at least one flow-regulating system including one or more shock-absorption components for the compression phase and/or for the decompression phase. The object is to allow the dashpot to shift continuously between the hard and soft phases, whereby the valve-adjustment intervals can be varied at intervals that are not unnecessarily short or even unattainable. At least one valve assembly is accordingly supplied with variable flow impedance by a regulating valve (5 or 6).
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: April 20, 2010
    Assignee: ThyssenKrupp Bilstein Suspension GmbH
    Inventors: Alfred Preukschat, Jürgen Adamek
  • Publication number: 20080157448
    Abstract: A wheel suspension for a motor vehicle has a transverse control arm that can be attached to a vehicle body by way of bearings and can be rotated about a longitudinal axis, and a body spring configured as a torsion bar spring for absorbing rotational movements of the transverse control arm about the longitudinal axis. The body spring is disposed on the transverse control arm so as to rotate with it, with a first end. An electromechanical actuator for changing the angle of rotation of the body spring is disposed at a second end of the body spring. The wheel suspension has a damping element. The second end of the body spring is connected with a stress relief spring that is configured as a torsion bar spring, disposed coaxially with the body spring, and can be attached to the vehicle body.
    Type: Application
    Filed: December 18, 2007
    Publication date: July 3, 2008
    Inventors: Alfred Preukschat, Thomas Brendecke, Luitpold Miller, Siegfried Ellmann
  • Publication number: 20080150250
    Abstract: A wheel suspension for a motor vehicle has a transverse control arm that can be attached to a vehicle body by way of bearings and a spring-elastic torsion bar assembly, and can be rotated about a longitudinal axis. The torsion bar assembly has a body spring that can be attached to the vehicle body with one end, and a transverse control arm spring that is attached to the transverse control arm with one end. The body spring and the transverse control arm spring are coupled with one another at their free ends. The transverse control arm spring and the body spring are coupled with one another by way of a setting element or a releasable connection, whereby the setting element or the releasable connection, respectively, allows rotation of the ends assigned to one another, for setting purposes.
    Type: Application
    Filed: December 18, 2007
    Publication date: June 26, 2008
    Inventors: Alfred Preukschat, Thomas Brendecke, Luitpold Miller, Siegfried Ellmann
  • Publication number: 20020074197
    Abstract: A regulable dashpot with shock-absorption force controls, especially intended for motor vehicles, with at least one flow-regulating system including one or more shock-absorption components for the compression phase and/or for the decompression phase. The object is to allow the dashpot to shift continuously between the hard and soft phases, whereby the valve-adjustment intervals can be varied at intervals that are not unnecessarily short or even unattainable. At least one valve assembly is accordingly supplied with variable flow impedance by a regulating valve (5 or 6).
    Type: Application
    Filed: December 7, 2001
    Publication date: June 20, 2002
    Inventors: Alfred Preukschat, Jurgen Adamek
  • Patent number: 5833037
    Abstract: An apparatus for damping spring-mounted wheel suspension systems is disclosed as having a cylinder filled with damping medium. The cylinder is divided by a piston on a piston rod into two work chambers. The two work chambers are connected to one another by damping valves and an additional fluid connection. The additional fluid connection is provided with a non-return valve between the two work chambers. The non-return valve has an actuator which can be switched as desired inside a valve device. The valve device has a damping force adjustment which acts in opposite directions for the two directions of flow. At least one non-return valve is dependent on the direction of flow and is provided with resistance. The non-return valve is moved into its operating position by the actuator.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: November 10, 1998
    Assignee: Fichtel & Sachs AG
    Inventor: Alfred Preukschat
  • Patent number: 5228663
    Abstract: Elastomeric bearing, consisting of an outer cover, at least one rigid intermediate body and a support body, whereby a suspension element is always located between two neighboring bodies. The suspension elements have different suspension characteristics in the radial and axial direction as well as different damping characteristics and can be adjusted using a controllable switch apparatus. It should be possible to precisely control an individual suspension element to produce different suspension and damping characteristics.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: July 20, 1993
    Assignee: BOGE AG
    Inventors: Hans-Dieter Adler, Gerd Gab, Wolfram Krause, Peter Maier, Wolfgang Monig, Alfred Preukschat
  • Patent number: 4986393
    Abstract: An adjustable vibration damper is for a motor vehicle or the like. The vibration damper includes a cylinder containing a damping medium. A piston is disposed within the cylinder for movement of the damping medium. A valve device is connected to the cylinder for flow of the damping medium therethrough. The valve device has at least a first damping element and a second damping element. The first damping element includes a first compression valve assembly and a first decompression valve assembly. The second damping element includes a second compression valve assembly and a second decompression valve assembly. The first compression valve assembly, the first decompression valve assembly, the second compression valve assembly, and the second decompression valve assembly have respective damping characteristics. There is included switching apparatus for selectively switching to at least one of the first and the second damping elements to select the respective damping characteristics thereof.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: January 22, 1991
    Assignee: Boge AG
    Inventors: Alfred Preukschat, Norbert Ackermann
  • Patent number: 4850460
    Abstract: Shock absorber for vehicles, in which there is a damping element, which has a work cylinder holding a damping medium and divided into two work chambers by a piston, whereby at least partly to control the damping force, an electromagnetically activated and axially moving valve body of a valve pressurizes a flow passage. A variable damping adjustment becomes possible, and by means of a variably controlled damping valve, any desired adjustable damping of the decompression and compression stage can be achieved. In addition, by varying the effective hydraulically-influenced functional surfaces of the valve body, the switching, frequency, closing and opening action of the valve body, designed as the armature of an electromagnet, can be influenced. A seat surface is oriented together with the end surface of the valve body, whereby at least a portion of the end surface of the valve body and of the valve seat are located at a distance from one another.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: July 25, 1989
    Assignee: Boge AG
    Inventors: Heinz Knecht, Alfred Preukschat
  • Patent number: 4785920
    Abstract: Shock absorber for motor vehicles, on which there is a damping element, which exhibits a working cylinder to hold a working medium, divided by a piston into two working chambers, whereby an electromagnetically-activated and axially-movable valve body of the valve pressurizes a flow passage, at least partly to control the damping force. The object of the invention is to make possible a variable damping adjustment, whereby by means of a variably-controllable damping valve, an adjustable damping of the decompression and compression stages can be achieved. In addition, by variation of the effective hydraulically-influenced functional surfaces of the valve body, the switching, frequency, closing and opening action of the valve body, designed as the armature of an electromagnet, can be influenced.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: November 22, 1988
    Assignee: Boge AG
    Inventors: Heinz Knecht, Alfred Preukschat
  • Patent number: 4650042
    Abstract: A vibration damping system for vehicles, with a damping element in a cylinder. The cylinder holds a damping medium and is divided into two chambers by a piston. A damping valve, located in a bypass, is connected parallel to the work cylinder. The damping valve variably controls damping to any desired damping in the decompression and compression stages of operation of the vibration damping system. The damping valve has an axially-movable, controllable valve being disposable in an opening. The controllable valve is connected in a series fluid flow relationship with at least one pressure-controlled, spring-loaded valve within the same valve body. The damping valve can be installed in numerous variations in vibration damping systems of vehicles.
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: March 17, 1987
    Assignee: Boge GmbH
    Inventors: Heinz Knecht, Alfred Preukschat, Hubert Beck