Patents by Inventor Clarence R. Kelley

Clarence R. Kelley 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).

  • Two hole hydraulic cushion valve
    Patent number: 4393751
    Abstract: A cushion valve for a hydraulic piston. The valve includes two inlet ports each connected into the same end of the cylinder. One port leads directly to an outlet while the second port feeds to the outlet through a floating, restricted flow orifice to provide a cushioning effect for the piston.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: July 19, 1983
    Assignee: C. C. Kelley & Sons
    Inventor: Clarence R. Kelley
  • Adjustable spring loaded agricultural tool mounting
    Patent number: 4078615
    Abstract: An adjustable spring loaded agricultural tool mounting accommodating pivotal movement of the tool relative to a normal operative relation to an implement frame when said tool encounters an obstacle. The tool includes a part projecting upwardly and rearwardly from the tool pivot and a longitudinally extensible and adjustable strut is pivoted in upwardly and rearwardly spaced relation to the tool pivot and bears against the upper free end portion of said upwardly and rearwardly extending tool part. At least one of said strut and said upwardly and rearwardly projecting tool part includes a spring portion.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: March 14, 1978
    Assignee: C. C. Kelley & Son, Inc.
    Inventor: Clarence R. Kelley