Bearing unit

Details Bearing unit Bearing unit

2005-12-06

2005-12-06

Hannon, Thomas R. (Department: 3682)

Bearings

Rotary bearing

Antifriction bearing

C384S518000, C384S537000

Reexamination Certificate

active

06971801

ABSTRACT:
A bearing unit includes: a housing; a shaft passing through the housing and rotatably supported on the housing; and a pair of rolling bearings disposed between the housing and the shaft and fitted to two positions on the shaft, which are axially spaced apart from each other. At least one rolling bearing has an inner ring press-fitted to the shaft. The inner ring defines an intermediate portion including an inner raceway surface. A reduced diameter part having an outer diameter smaller than the inner diameter of the inner ring and a predetermined width in the axial direction is formed on the shaft at a position corresponding to the intermediate portion so that inner circumferential surfaces located at both ends of the inner ring in the axial direction are interference fitted to the shaft and the inner circumferential surface at the intermediate portion thereof is clearance fitted to the shaft.

REFERENCES:
patent: 4699528 (1987-10-01), Gotman
patent: 4721441 (1988-01-01), Miyashita et al.
patent: 5047677 (1991-09-01), Mineta et al.
patent: 5147144 (1992-09-01), Kasai
patent: 5354391 (1994-10-01), Goodell et al.
patent: 5552650 (1996-09-01), Cap et al.
patent: 5584778 (1996-12-01), Machida et al.
patent: 5686771 (1997-11-01), Ishizuka et al.
patent: 5863136 (1999-01-01), Miyazaki
patent: 5899574 (1999-05-01), Chujo
patent: 6042273 (2000-03-01), Thrasher
patent: 405071548 (1993-03-01), None
patent: 7-167151 (1995-07-01), None
patent: 9-88966 (1997-03-01), None

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