Brush holder device for electric motor

Details Brush holder device for electric motor Brush holder device for electric motor

1990-05-14

1991-05-28

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310240, 310247, 310248, H01R 3938

Patent

active

050197410

ABSTRACT:
A brush holder device for an electric motor has a brush holder, a brush movably received in the brush holder, and a spring which acts between the bottom of the brush holder and the outer end of the brush so as to resiliently press the brush into contact with a commutator. The surface of the bottom of the brush holder on which one end of the spring acts and the outer end surface of the brush on which the other end of the spring acts are inclined in opposite directions along the axis of the motor such that the distance between the surfaces is greater at one axial end than at the other axial end of the brush holder. As a result, the spring is naturally urged to and stably held in the axial end where the distance between these two surfaces is greater. In addition, or alternatively, the bottom surface of the brush holder includes a recessed portion for containing the spring at one axial end of the brush holder.

REFERENCES:
patent: 3745393 (1973-07-01), Spors

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