Starter having an improved brush holder

Details Starter having an improved brush holder Starter having an improved brush holder

1997-11-24

1999-04-20

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

H01R 3938

Patent

active

058959955

ABSTRACT:
A brush holder holding a brush has a brush-accommodating hole accommodating the brush. A heat release groove is formed on one surface of peripheral surfaces forming the brush-accommodating hole. The heat release groove is formed at the side of the peripheral surface, of the brush holder, confronting a side surface of the brush at which a pig tail is fixed such that the heat release groove extends in a thickness direction of the brush holder which partitions a first space located at a side in which an armature is accommodated from a second space located at an opposite side in which an electromagnetic switch is accommodated. The heat release groove communicates the first and second spaces with each other. A wall surface of the heat release groove confronting the side surface of the brush is inclined such that the distance between the side surface and the wall surface becomes gradually greater rearward from the commutator surface in a thickness direction of the brush holder.

REFERENCES:
patent: 5070270 (1991-12-01), Morikane
patent: 5608280 (1997-03-01), Tamemoto et al.
patent: 5610466 (1997-03-01), Shiga et al.

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