Patents by Inventor Richard G. Carpenter

Richard G. Carpenter 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).

  • Canned motor pumps pressurized recirculation system
    Patent number: 4616980
    Abstract: A canned motor pump pressurized recirculation system which comprises a main unit and a recirculation line. The main unit includes a main pump, an auxiliary pump and motor means positioned between the main and the auxiliary pumps for driving the pumps. The recirculation line is positioned external of the main unit, and is connected thereto between the pumps. The recirculation line is adapted to pass fluid therethrough such that the fluid will be passed by the auxiliary pump through the motor means to the high pressure portion of the main pump. The auxiliary impeller is adapted for easy replacement by impellers of various sizes.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: October 14, 1986
    Assignee: Crane Co.
    Inventor: Richard G. Carpenter