Patents by Inventor Reiner Thewalt

Reiner Thewalt 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).

  • Adjustable brake actuator, especially for vehicle drum brakes
    Patent number: 4688661
    Abstract: A casing (10) has a bore (14) and a clutch face (48) concentric with the bore. In the bore (14) a tappet (30) of variable length is slidably guided and includes two threaded members (34,36) interconnected by a self-locking screw thread pair (38). A clutch member (50) connected to one of the two threaded members (34) by a non-self-locking screw thread pair (52) is associated with the clutch face (48). A support member (60 ) having an aperture (68) through which the other one of the two threaded members (36) extends is fixed to the casing (10). A clutch spring (70) is inserted between the support member (60) and the clutch member (50) and urges the clutch member (50) into abutment against the clutch face (48). A sealing boot (72) which is disposed outside of the support member (60) with respect to the casing (10) provides an external seal for the screw thread pairs (38,52) and the clutch member (50). The support member (60) and the sealing boot (72) are separately fixed to the casing (10).
    Type: Grant
    Filed: November 8, 1985
    Date of Patent: August 25, 1987
    Assignee: Lucas Industries Public Limited Company
    Inventors: Harald Gockel, Reiner Thewalt, Wilfried Giering