Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1986-06-23
1987-10-27
Ward, Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277177, 277206R, F16J 1532
Patent
active
047024828
ABSTRACT:
A sealing assembly, suitable for sealing between two relatively-slidable parts, includes a sealing ring which is housed in an annular groove in one of the parts, which is formed with two circumferential lip portions and which is formed with a circumferential landed portion disposed between those portions. Elastomeric energizing means, also in the grooves and in engagement with the sealing ring, urges the lip portions into fluid sealing engagement with the other of the parts. The landed portion is, under conditions of low fluid pressure upon the assembly, free from fluid sealing engagement with the other part but, under conditions of high fluid pressure upon the assembly, is caused to come into fluid sealing engagement with the other part to supplement the sealing by the lip portions and to share with those portions contact stresses arising on relative movement of the two parts under high applied fluid pressure.
REFERENCES:
patent: Re28105 (1974-08-01), Traub
patent: 2893795 (1959-07-01), Dooling
patent: 3268235 (1966-08-01), Jacobellis
patent: 3608913 (1971-09-01), D'Assignies
patent: 3636824 (1972-01-01), Clark
patent: 4335887 (1982-06-01), Benassi
Dowty Seals Limited
Ward Robert S.
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