Patents by Inventor John R. Metcalf

John R. Metcalf 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 unloader assembly
    Patent number: 5642753
    Abstract: A plate mounted to a reciprocable shaft has a plurality of straight fingers (a) coupled thereto and (b) extending perpendicularly therefrom, and each of the fingers is separately detachable from the plate to simplify and facilitate maintenance and repair. Further, the fingers are identical, whereby manufacturing and stocking requirements are minimized.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: July 1, 1997
    Assignee: Dresser-Rand Company
    Inventors: Ethan P. Thistle, Michael A. DeCerbo, John R. Metcalf