Extended wear annular oil seal

Details Extended wear annular oil seal Extended wear annular oil seal

1984-08-09

1985-07-30

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277153, F16J 1532

Patent

active

045317470

ABSTRACT:
A sealing apparatus comprises an annular elastic seal member having a main annular lip and an auxiliary annular lip extending substantially radially inwardly to a rotatable shaft with inclination so as to define an annular chamber between both the lips. A plurality of projections or grooves are formed in an inner peripheral surface of the auxiliary annular lip in the vicinity of a sealing portion thereof to form flow passages which allow the annular chamber to be communicated to the atmosphere upon generation of vacuum within the annular chamber, to thereby prevent excessive contact pressure from being applied to the sealing portions of the main and auxiliary sealing lips under action of vacuum and protect the seal from abrasion.

REFERENCES:
patent: 3259393 (1966-07-01), Dega
patent: 3455564 (1969-07-01), Dega
patent: 3482845 (1969-12-01), Bertrandi et al.
patent: 3515395 (1970-06-01), Weinand
patent: 3534969 (1970-10-01), Weinland
patent: 3589739 (1971-06-01), Scholten
patent: 3606353 (1971-09-01), Heinl
patent: 3633927 (1972-01-01), Van Deven
patent: 3934888 (1976-01-01), Lutz
patent: 4288083 (1981-09-01), Braconier
patent: 4399998 (1983-08-01), Otto

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