Patents by Inventor Gerhard Hettlich

Gerhard Hettlich 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).

  • Method of and apparatus for actuating the torque transmitting system and the transmission in the power train of a motor vehicle
    Patent number: 6116391
    Abstract: The friction clutch between the engine and an automated transmission in the power train of a motor vehicle are operated and controlled by an actuator which effects changes in the extent of engagement of the clutch as well as the selection of and shifting into particular gears. The actuator forms part of a unit which receives a pressurized hydraulic fluid from a source including an accumulator and a proportional valve which latter selects the fluid pressure necessary to shift the transmission into a selected gear.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: September 12, 2000
    Assignees: LuK Getriebe-Systeme GmbH, AFT Atlas Fahrzeugtechnik GmbH, LuK Fahrzeug-Hydraulik GmbH & Co. KG, Temic Telefunken Microelectronic GmbH
    Inventors: Burkhard Kremmling, Nguyen van Doan, Gerhard Overdiek, Ivo Agner, Dirk Heintzen, Dethlef Axmacher, Matthias Gramann, Gerhard Hettlich