Patents by Inventor Günter Rühle

Günter Rühle 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).

  • Torque transfer device and engageable, shiftable clutch in an all-wheel drive arrangement for a motor vehicle
    Patent number: 4700820
    Abstract: A multiple-disk visco-clutch is arranged in the drive line of the front axle and the rear axle of a four wheel-drive motor vehicle. In order to prevent an overheating of the multiple-disk visco-clutch, such as when the vehicle is being towed, the visco-clutch is separable from the drive line by means of a shiftable toothed clutch. The lubricating-oil pressure, the intake pipe vacuum or other characteristic quantities of the motor vehicle may be used for actuating the toothed clutch when the internal-combustion engine is stopped, thereby automatically causing the separating of the multiple disk visco-clutch from the drive line.
    Type: Grant
    Filed: April 18, 1986
    Date of Patent: October 20, 1987
    Assignee: Dr. Ing. H.c.f. Porsche AG
    Inventors: Udo Hickmann, Guenter Ruehle