Patents by Inventor Dennis R. Helm

Dennis R. Helm 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).

  • Engine and transmission control system
    Patent number: 4125039
    Abstract: An engine and transmission control system provides for one lever control through a first device of engine speed and direction of output shaft rotation. A second control lever is provided to control a transmission and modulated clutch in the transmission. The second control lever, positionable by the operator at intermediate positions provides for clutch slippage during maneuver operations of an engine driven water craft so that the operator of the water craft may devote more attention to maneuvering. A second embodiment provides the same modulated clutch features for dual station control.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: November 14, 1978
    Assignee: Caterpillar Tractor Co.
    Inventor: Dennis R. Helm