Roller bearing unit having an improved structure for retaining a

Details Roller bearing unit having an improved structure for retaining a Roller bearing unit having an improved structure for retaining a

1996-08-22

1998-09-29

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324174, 384448, G01P 344, G01P 3488

Patent

active

058149848

ABSTRACT:
A rolling bearing unit having a rotating speed detector includes an outer race, an inner race, a cover made of synthetic resin, a sleeve made cylindrically of metal, and a seal ring fitted between the cover and the outer race, in which a first leaking passage exists between a first clearance formed on an engaging surface between the sleeve and the outer race and a third clearance formed between the outer race and the cover, the first and the third clearances being arranged in series to each other, and a second leaking passage exists between the third clearance and a second clearance formed in a contact portion of the sleeve with the cover, the third and the second clearances being arranged in series to each other. The single seal ring is capable of preventing the entrance of muddy water into the cover and the outer race through the first and the second clearance.

REFERENCES:
patent: 4988220 (1991-01-01), Christiansen et al.
patent: 5010290 (1991-04-01), Foster
patent: 5148104 (1992-09-01), Ishikawa
patent: 5172984 (1992-12-01), Lederman
patent: 5195807 (1993-03-01), Lederman
patent: 5296805 (1994-03-01), Clark et al.
patent: 5550467 (1996-08-01), Goossens
patent: 5602335 (1997-02-01), Ouchi
patent: 5622436 (1997-04-01), Morita et al.
patent: 5663640 (1997-09-01), Sakamoto

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