Patents by Inventor Derek Woolatt

Derek Woolatt 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).

  • Compressor valve with flat spring
    Patent number: 4889156
    Abstract: A sealing apparatus for use in a compressor suction or pressure plate valve having a seat member with a plurality of fluid passage ports therethrough. The sealing apparatus comprises a movable plastic plate member having a like plurality of sealing members for juxtaposed sealing engagement with the plurality of fluid passage ports and at least one projection integrally formed on at least one of the sealing members and extending outwardly from the plate member in a direction away from the seat member for receiving a resilient flat spring member urging the plate member against and sealing the fluid passage ports.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: December 26, 1989
    Assignee: Dresser Industries, Inc.
    Inventors: Derek Woolatt, George J. Safford