Bearing seals and bearing and seal assemblies

Details Bearing seals and bearing and seal assemblies Bearing seals and bearing and seal assemblies

1996-10-18

1997-12-16

Footland, Lenard A.

Bearings

Rotary bearing

Antifriction bearing

384474, 384477, 384484, 384488, F16C 3378

Patent

active

056977107

ABSTRACT:
A bearing seal suitable for sealing a bearing system (18) under extremely abrasive and damp conditions. The seal assembly (22) includes a metal casing (36) received in a housing (26) which defines a small annular gap (34) relative to a shaft (16) supported by the bearing system (18). The seal assembly (22) includes a first seal (42) and a second seal (48) spaced apart to define an annular space (60). The assembly (22) is provided with a plurality of passages (64/66) circumferentially spaced apart from one another. Upon pumping grease (76) under pressure into the bearing system, grease is forced to flow through the passages (64/66) whereby the annular gap (34) is filled with grease throughout substantially the entire circumference thereof. The mass of grease retained in the annular gap (34) serves as a barrier against water and abrasive particles. A bearing and seal assembly (10) is also disclosed.

REFERENCES:
patent: 4699526 (1987-10-01), Sato
patent: 4792243 (1988-12-01), Takeuchi et al.
patent: 5000587 (1991-03-01), Hawley
patent: 5242229 (1993-09-01), McLarty
patent: 5370404 (1994-12-01), Klein et al.
patent: 5454647 (1995-10-01), Otto

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