Patents Represented by Attorney Laurence R. Hefter

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  • 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