Patents by Inventor Roy F. Engelbrecht

Roy F. Engelbrecht 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).

  • Patent number: 4756552
    Abstract: A vehicle having a steering system controlled by either of a pair of steering wheels also includes first and second steering wheel shafts means, each carrying one of the steering wheels. A wheel steering mechanism is mechanically connected to the first and second steering wheel shafts means. In accordance with this invention, a third shaft is attached at one end to the first steering wheel shafts means. The third shaft means is connected at its other end without intermediate, intervening gears to a gear for rotationally interconnecting the third shaft, the second steering wheel shaft, and the wheel steering mechanism. This structure can eliminate an expensive 90 degree gear box when compared with prior art designs, for significant cost savings while providing equivalent or superior function.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: July 12, 1988
    Assignee: Elgin Sweeper Company
    Inventors: Mario J. Martinez, Roy F. Engelbrecht