Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1978-06-08
1979-11-20
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 27, 277 74, 277 65, F16J 1540, F16J 1534
Patent
active
041748433
ABSTRACT:
A dynamic seal has a primary and secondary seal ring connected in series ween first and second fluid zones, with an intermediate fluid zone between the seal rings. When leakage occurs between the first and intermediate zones, the pressure in the intermediate zone builds up through a feedback system increasing the force on the primary seal rings. Furthermore, leakage through the primary seal also takes place creating another force that also provides a tighter seal. In addition, the primary and secondary seal rings have additional variable and feedback controls for adjusting the force on the dynamic seal.
REFERENCES:
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patent: 2895751 (1959-07-01), Standish
patent: 3088744 (1963-05-01), Ezekiel et al.
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patent: 3093382 (1963-06-01), Macks
patent: 3318604 (1967-05-01), Tracy
patent: 3506276 (1970-04-01), Petersen et al.
patent: 3659860 (1972-05-01), Muller
patent: 3685842 (1972-08-01), Cyphelly
patent: 3759532 (1973-09-01), Lindeboom
patent: 3804424 (1974-04-01), Gardner
Arena John P.
McGuigan Charles G.
Rossi Gene A.
Lall Prithvi C.
McGill Arthur A.
Sciascia Richard S.
The United States of America as represented by the Secretary of
Ward, Jr. Robert S.
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