Alternator having a slip-ring cover connected to brush holder

Details Alternator having a slip-ring cover connected to brush holder Alternator having a slip-ring cover connected to brush holder

2008-07-01

2008-07-01

Tamai, Karl I (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S088000, C310S232000, C310S058000

Reexamination Certificate

active

07394179

ABSTRACT:
An automotive alternator has slip-rings connected to a rotor shaft and a brush device covering the slip-rings. The brush device is composed of a brush holder supporting brushes therein and a slip-ring cover firmly connected to the brush holder. The slip-ring cover includes a wall curved in a U-shape and a pair of flat walls closing the axial ends of the curved wall. Openings for ventilating the brushes and the slip-rings are formed between the curved wall of the slip-ring cover and the sidewalls of the brush holder. When the brushes are positioned downward of the slip-rings, the openings are open to the downward of the slip-rings. Therefore, water is prevented from entering into the brush device through the openings.

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