Patents by Inventor Derald L. Hartley

Derald L. Hartley 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).

  • Hydraulic conduit having pivoting and telescoping capability
    Patent number: 4101251
    Abstract: Conduit means interconnect a hydraulic pump and a tank, the pump in turn being drivingly connected with a transmission. The conduit means include first and second conduits in telescoping and sealing relation which allows a degree of misalignment of one conduit relative to another, and allows one conduit to be pivoted about the longitudinal axis of the other.
    Type: Grant
    Filed: March 29, 1976
    Date of Patent: July 18, 1978
    Assignee: Caterpillar Tractor Co.
    Inventors: Arthur D. Gay, Derald L. Hartley, William H. Klekamp