Patents by Inventor Arnulf Ummen

Arnulf Ummen 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).

  • Belt drive system
    Patent number: 4070919
    Abstract: A belt drive system comprises a drive belt extending between driving and driven shafts. The belt has a flat part, and a rib extending from one surface of the flat part into an annular groove formed in each of the shafts. The grooves are of complementary cross-section to that of the rib, but are wider than the rib so that during operation of the drive system, one side only of the rib engages the adjacent side of the grooves, and the other side of the rib is spaced from the adjacent side of the grooves.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: January 31, 1978
    Assignee: Arntz-Optibelt-KG
    Inventors: Arnulf Ummen, Alexander Muller