Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1992-12-04
1995-07-04
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 29, 277 75, 277174, F16J 1516
Patent
active
054293740
ABSTRACT:
A dynamic hydraulic seal located in a gland or recess that is selectively pressurized and vented includes outer lips forced by hydraulic pressure into contact with the surfaces of the recess, inner lips forced by hydraulic pressure into sealing contact with a rotating member, and a web extending across the recess and formed with multiple holes through its thickness which serve as a passage for the hydraulic pressure through the seal to an hydraulic passage, which carries hydraulic fluid to journal or bearing surfaces that require lubrication. In the unpressurized free-state, the seal is retracted from contact with the dynamic surface and the web assumes an arcuate shape that closes the hole through its thickness. When pressurized, the seal deforms, the webs flatten, the hole is opened and the inner lips are forced by the hydraulic pressure into contact with the dynamic surface.
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DePumpo Daniel G.
Ford Motor Company
May Roger L.
McKenzie Frank G.
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