Patents by Inventor Gerhard Steigerwald

Gerhard Steigerwald 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).

  • Roller conveyor
    Patent number: 4164280
    Abstract: A hesitation device is provided in a material conveying roller conveyor system which is simple and inexpensive in construction, while at the same time allows accumulation of conveyed materials with any damaging or disturbing effect upon the conveyed material. This is achieved by providing unbalancing weights in the rollers of the conveyor in the stoppage or hesitation area in combination with a driving belt for the rollers having areas of differing coefficients of friction.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: August 14, 1979
    Assignee: DeMag Aktiengesellschaft
    Inventors: Walter Duttine, Helmut Kratz, Harald Bosch, Gerhard Steigerwald