Fluid seals with self-venting auxiliary lips

Details Fluid seals with self-venting auxiliary lips Fluid seals with self-venting auxiliary lips

1984-10-01

1985-06-11

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277153, F16J 1532, F16J 1554

Patent

active

045224110

ABSTRACT:
A pumping seal having an elastomeric hydrodynamic primary lip and a resinous fluorocarbon auxiliary lip. The auxiliary lip is of completely or partially frusto-conical form in at least one portion so as to provide desirable venting geometry. Said auxiliary lip is bonded to a portion of the primary seal lip adjacent the area at which the primary lip is bonded to the casing of the seal. The seal provides a strong pumping action without providing the potential for drawing a measurable vacuum in the inter-lip area.

REFERENCES:
patent: 3785660 (1974-01-01), Bush
patent: 3934888 (1976-01-01), Lutz
patent: 4283064 (1981-08-01), Staab et al.
patent: 4336945 (1982-06-01), Christiansen et al.
patent: 4350347 (1982-09-01), Heinrich

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