Patents by Inventor Willem Koppelaars

Willem Koppelaars 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).

  • Transmission belt, cross element for a transmission belt and method and device for the production thereof
    Patent number: 4894049
    Abstract: Cross element for an assembled transmission belt, said cross element bearing with its main sides against the main sides of abutting cross elements in mounted condition, whereby the surface of at least one main side shows at least three calibrated, separated surfaces lying in one and the same plane, which are elevated relatively to the immediate surroundings of the surfaces, said plane being perpendicular to the linear direction of movement of the transmission belt during operation.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: January 16, 1990
    Assignee: Van Doorne's Transmissie B.V.
    Inventor: Willem Koppelaars