Patents by Inventor Siegfried Jonas

Siegfried Jonas 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).

  • Friction elements, especially for drum brakes
    Patent number: 4694937
    Abstract: A friction element with a riveted friction lining, especially for highly stressed drum brakes, in which the mating surface (5) of the friction lining (2) to the lining carrier (1) and/or the opposing surface (6) of the lining carrier (1) to the friction layer (2) is provided with a multiplicity of particles (7) which are harder than the material of the opposing surface (6) of the lining carrier (1).
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: September 22, 1987
    Assignee: Beral Bremsbelag GmbH
    Inventor: Siegfried Jonas