Bearing unit

Details Bearing unit Bearing unit

2005-12-28

2008-10-14

Hannon, Thomas R (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S279000

Reexamination Certificate

active

07435002

ABSTRACT:
A bearing unit comprises a cylindrical oil-impregnated bearing, in which a bearing bore to support a turning shaft is formed so as to enable the turning shaft to turn; a bearing holder, in which the oil-impregnated bearing is fixed by an inner bore; a first groove being formed in an axial direction on an inner circumferential surface of the oil-impregnated bearing; and a second groove being formed in an axial direction on at least one of an outer circumferential surface of the oil-impregnated bearing and an inner circumferential surface of the bearing holder. The second groove is formed so as to have a greater depth than that of the first groove. The second groove is also formed so as to have a larger cross section than that of the first groove.

REFERENCES:
patent: 3601459 (1971-08-01), Cutting
patent: 5715116 (1998-02-01), Moritan et al.
patent: 5785429 (1998-07-01), Jeong
patent: 5863134 (1999-01-01), Chen
patent: 5941646 (1999-08-01), Mori et al.
patent: 6244749 (2001-06-01), Nakagawa et al.
patent: 03-107612 (1991-05-01), None

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