Patents by Inventor John W. Reinwald

John W. Reinwald 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).

  • Valve leakage inspection, testing and maintenance process
    Patent number: 4916938
    Abstract: A valve maintenance process is described that allows for the inspection and testing of valve stem packing and back-seat leakage. The process uses the characteristics of incompressible fluid flow to check the integrity of the valve back-seat, to allow the controlled removal of the complete packing set and to confirm the newly installed packing set is not leaking. The process is designed to reduced down-time and to improve the engineering quality of valve repair.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: April 17, 1990
    Assignee: Atomic Energy of Canada Limited
    Inventors: John A. Aikin, Derek Angus, John W. Reinwald, Jack Schankula