Patents by Inventor Donald A. Ahrendt

Donald A. Ahrendt 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).

  • Single lever control device for multiple functions
    Patent number: 4523488
    Abstract: A compact single lever control device (26) is provided for a lift truck (11) which permits an operator to operate a carriage raising and lowering control valve spool (77) by lateral movement of a manual control lever (46) and to cause the lift truck to travel in forward and reverse directions by forward and reverse movement of the control lever (46).
    Type: Grant
    Filed: November 5, 1982
    Date of Patent: June 18, 1985
    Assignee: Allis-Chalmers Corp.
    Inventor: Donald A. Ahrendt