Hydrodynamic low-torque lubricant seal with pumping projections

Details Hydrodynamic low-torque lubricant seal with pumping projections Hydrodynamic low-torque lubricant seal with pumping projections

1996-09-10

1997-10-14

Gutierrez, Diego F. F.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277152, 277 53, 277 67, 384484, 384486, 384478, F16J 1532

Patent

active

056763832

ABSTRACT:
An annular elastomeric sealing member includes a static sealing lip and a series of projections facing the lubricant. Each projection has a convex front surface that provides two oppositely facing pumping faces and an angled rear surface that intersects the front surface at an acute angle so as to form a sharp leading edge. The sharp leading edge on each projection has a relatively small radial clearance with respect to the cylindrical surface that is to be sealed. This small clearance enables the projections to exert pumping forces on lubricant proximate to the cylindrical surface.

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patent: 3790180 (1974-02-01), Heyn et al.
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patent: 3895814 (1975-07-01), Kupfert
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patent: 4822058 (1989-04-01), Butler et al.
patent: 5017025 (1991-05-01), Williams
patent: 5511886 (1996-04-01), Sink

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