Patents by Inventor Lutz Witthoft

Lutz Witthoft 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).

  • Device for variably adjusting the control times of gas exchange valves of an internal combustion device
    Patent number: 8763574
    Abstract: A device (11) for variably adjusting the control times of gas exchange vales (9, 10) of an internal combustion engine (1) having a hydraulic phase adjustment device (12) and at least one volume accumulator (31), wherein the phase adjustment device (12) can be brought into driving connection with a crankshaft (2) and a camshaft (6, 7) and at least one early adjustment chamber (24) and at least one late adjustment chamber (25) which can be supplied with pressure medium via pressure medium lines (26a, b, p. v), or from which pressure medium can be drained.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: July 1, 2014
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Jurgen Plate, Jochen Auchter, Lutz Witthoft
  • Internal combustion engine having a hydraulic device for adjusting the rotation angle of a camshaft relative to a crankshaft
    Patent number: 7222597
    Abstract: A hydraulic device for adjusting the rotation angle of a camshaft relative to a crankshaft in an internal combustion engine. The device has a rotor, with blades arranged around its periphery. A stator is connected in a rotationally secure manner to a drive wheel. The rotor and the stator together form pressure chambers, which can be filled with hydraulic fluid via a hydraulic fluid system, in which there is disposed a volume accumulator.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: May 29, 2007
    Assignee: INA-Schaeffler KG
    Inventors: Jochen Auchter, Andreas Strauss, Lutz Witthöft, Michael Busse, Dirk Heintzen, Jürgen Plate
  • Internal combustion engine having a hydraulic device for adjusting the rotation angle of a camshaft relative to a cranks haft
    Publication number: 20050274344
    Abstract: A hydraulic device for adjusting the rotation angle of a camshaft relative to a crankshaft in an internal combustion engine. The device has a rotor, with blades arranged around its periphery. A stator is connected in a rotationally secure manner to a drive wheel. The rotor and the stator together form pressure chambers, which can be filled with hydraulic fluid via a hydraulic fluid system, in which there is disposed a volume accumulator.
    Type: Application
    Filed: June 14, 2005
    Publication date: December 15, 2005
    Inventors: Jochen Auchter, Andreas Strauss, Lutz Witthoft, Michael Busse, Dirk Heintzen, Jurgen Plate