Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-05-02
2006-05-02
Lam, Thanh (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S089000
Reexamination Certificate
active
07038340
ABSTRACT:
An AC generator for a vehicle includes front and rear bearings held by a housing, a stator disposed in the housing, a rotor having a rotation shaft rotatably supported by the front and rear bearings, and a multiple-helical wave washer disposed to apply a pre-load to at least one of outer rings of the front and rear bearings. The housing includes a front frame that has a front bearing box for holding the front bearing, and a rear frame that has a rear bearing box for holding the rear bearing, and the stator is disposed between the front frame and the rear frame. In addition, the multiple-helical wave washer can contact the outer ring of the rear bearing and a side wall of the rear bearing box. Accordingly, creep resistance of the rear bearing is improved within an allowable pre-load range.
REFERENCES:
patent: 5639074 (1997-06-01), Greenhill et al.
patent: 6388351 (2002-05-01), Fisher et al.
patent: 6486580 (2002-11-01), Cenzer et al.
patent: A-08-103049 (1996-04-01), None
patent: A-09-287620 (1997-11-01), None
patent: A-2000-087964 (2000-03-01), None
Ihata Koichi
Nakamura Shigenobu
Denso Corporation
Lam Thanh
Oliff & Berridg,e PLC
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