Patents by Inventor Robert R. Brecht

Robert R. Brecht 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).

  • Steering and width controls for expandable tandem rollers
    Patent number: 4109742
    Abstract: An hydraulic system controlling the steering and width of an articulated expandable tandem roller turns both rolls at the same time in opposite directions when the machine is being steered or in the same direction when being expanded or contracted. An operator controlled electrical system, also governing travel of the machine in either opposite direction, controls steering and width adjustment and automatically reverses the "hand" of the steering when the direction of travel of the machine is reversed.
    Type: Grant
    Filed: February 24, 1977
    Date of Patent: August 29, 1978
    Assignee: Iowa Manufacturing Company
    Inventors: Louis F. Fairchild, Robert R. Brecht