Vehicle alternator with improved operation reliability

Details Vehicle alternator with improved operation reliability Vehicle alternator with improved operation reliability

2007-06-22

2009-11-10

Zarroli, Michael C (Department: 2839)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S239000

Reexamination Certificate

active

07615908

ABSTRACT:
An alternator for a vehicle is disclosed as having front and rear frames supporting a stator having a stator winding, a rotor fixedly carried on a rotary shaft and rotatably disposed inside the stator while having a field winding, a bush unit accommodating brushes held in sliding contact with slip rings formed on the rotary shaft, and a brush-wear particle collecting section for collecting brush-wear particles resulting from sliding contact between the brushes and the slip rings. In one embodiment, the bush unit includes a bush holder holding the bushes and a sealing plate member having the brush-wear particle collecting section. In another embodiment, the rear frame carries a protective cover formed with the brush-wear particle collecting section. In a further embodiment, the rotary shaft carries thereon brush-cooling means formed adjacent to the slip rings for creating an air stream to cool the brushes.

REFERENCES:
patent: 5296772 (1994-03-01), Bradfield et al.
patent: 5550418 (1996-08-01), Chung
patent: 6294856 (2001-09-01), Ishida et al.
patent: 6664699 (2003-12-01), Shioya et al.
patent: 6710499 (2004-03-01), Tsuge
patent: 2006/0273685 (2006-12-01), Wada et al.
patent: A 2000-139058 (2000-05-01), None
patent: A 2002-359951 (2002-12-01), None
patent: A 2006-340467 (2006-12-01), None

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