Bidirectional seal with elliptical sealing barriers

Details Bidirectional seal with elliptical sealing barriers Bidirectional seal with elliptical sealing barriers

1986-11-21

1988-04-26

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 1, 277152, 277203, F16J 1532

Patent

active

047399988

ABSTRACT:
A bidirectional shaft seal includes a plurality of concentric, radially-staggered contact surfaces arranged so as to engage a shaft along elliptical contact bands. Each contact band forms a static and dynamic barrier to prevent leakage under clockwise and couterclockwise shaft rotation. The elliptical contact may be achieved by offsetting the center of the seal lip from the axis of the shaft or by eccentrically clamping or bonding the seal lip within a seal case and mounting the seal lip concentrically with the shaft.

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