Patents by Inventor James T. Clemenson

James T. Clemenson 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).

  • Hammer starting mechanism
    Patent number: 4418769
    Abstract: A starting mechanism for a reciprocating piston pneumatic hammer provides a passageway coupling a pneumatic piston subchamber to an exit port to exhaust pressurized pneumatic fluid from the subchamber during a start-up period. A pneumatic valve is provided to open the passageway as the hammer is started so as to create a pressure differential in the coupled piston subchamber, and thus prevent the piston from centering. The valve closes the passageway after the piston reciprocation has begun.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: December 6, 1983
    Assignee: Cooper Industries, Inc.
    Inventors: Robert R. Vincent, James T. Clemenson
  • Pneumatic percussion drill with exhaust cooling and lubrication of chuck end
    Patent number: 4243110
    Abstract: A pneumatic percussion rock drill includes a muffler casing surrounding the drill cylinder part and sealingly engaged with the drill housing so that exhaust air from the percussion motor flows forward through ports in a forward housing member into a chamber containing the drill chuck, the chuck rotation gearing, and the drill stem shank. Exhaust air is used to cool and lubricate the chuck parts before exiting from the drill onto the feed mechanism located below the drill housing.
    Type: Grant
    Filed: February 8, 1979
    Date of Patent: January 6, 1981
    Assignee: Cooper Industries, Inc.
    Inventors: James T. Clemenson, Robert R. Vincent