Patents by Inventor Robert G. Greenawalt

Robert G. Greenawalt 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).

  • Sealing ring retention device
    Patent number: 4304408
    Abstract: A sealing ring retention device for use in rotary mechanical fluid seals subjected to high fluid pressure and/or high temperature environments which utilizes unitary locking and anti-rotational structural features.
    Type: Grant
    Filed: June 27, 1980
    Date of Patent: December 8, 1981
    Assignee: EG&G Sealol, Inc.
    Inventor: Robert G. Greenawalt
  • Rotating bellows seal
    Patent number: 3977685
    Abstract: An improved rotating bellows seal is disclosed which includes a bellows core having an annular mounting plate at one end adapted to drivingly and sealingly engage a shaft and a bellows seal ring on the other end to sealingly engage a mating seal ring. The mating and bellows seal rings are provided with conical inside diametral surfaces to prevent leakage fluids from entering the bellows core.
    Type: Grant
    Filed: November 5, 1974
    Date of Patent: August 31, 1976
    Assignee: EG&G, Inc.
    Inventors: Robert G. Greenawalt, Edward J. Swann