Patents Represented by Attorney Donald D. Jeffrey

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  • Ball valve
    Patent number: 4068822
    Abstract: In a ball-valve having an apertured rotatable ball and a seal ring contacting the surface of the ball, a radial seal includes a body insert longitudinally movable along a fluid passageway to contact the rear face of the seal ring and a peripheral ring lying partly in an internal annular groove in said passageway and partly in a rebate formed in the seal ring-insert assembly.The body insert is preferably threaded in said passageway.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: January 17, 1978
    Assignee: B. C. Richards & Co. Pty. Ltd.
    Inventor: Cecil Graham Richards