Title: Spring seal

Abstract: A sealing ring firmly grips a movable piston, performs the normal sealing function, and when pressure is released on the piston the sealing ring pulls back on the piston so as to retract the piston. The sealing ring is designed so as to fit in a conventional seal or "O" ring groove without any modification of the groove.

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Inventors: Burke, John A. (Rocky River, OH, US)
Gross, James B. (Lansdale, PA, US)

Application Number: 053883
Filing Date: 1979-07-02
Publication_date: 1980-10-21
Assignee: Greene, Tweed & Co., Inc. (North Wales, PA)
Primary Class(es): 277/584 188/71.8, 188/196P, 277/560, 277/572
Other Classes:
US Patent Ref:

3218087	Nov, 1965	Hallesy	277/188.
3582094	Jun, 1971	Whittaker	277/188.
3693786	Sep, 1972	Lambie	277/188.

Other Refs:
Primary Examiner: Smith, Robert I.
Assistant Examiner:
Attorney: Seidel, Gonda, Goldhammer & Panitch