Patents by Inventor Hermann Grothe

Hermann Grothe 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).

  • Door stop, in particular for motor vehicle doors
    Patent number: 5586361
    Abstract: A door stop including an hydraulic cylinder connectable to one of a door assembly part, a stop piston longitudinally displaceable in the hydraulic cylinder and connected with another part of the door assembly by a piston rod, and two spring-biased closing pistons located in two separate conduits formed in the stop piston for communicating two, spaced by the stop piston, pressure chambers formed in the cylinder, with a limited length conduit being formed in the hydraulic cylinder and by-passing the stop piston for directly communicating the pressure chambers.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: December 24, 1996
    Assignee: Ed. Scharwachter GmbH & Co. KG.
    Inventors: Karl-Heinz T olle, Hermann Grothe