Brush holder with plastic cup to retain biasing spring

Details Brush holder with plastic cup to retain biasing spring Brush holder with plastic cup to retain biasing spring

1988-04-28

1989-10-24

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310242, 310245, H02K 1300

Patent

active

048764752

ABSTRACT:
A brush assembly for a commutator type electrical machine includes a biasing spring for biasing a carbon brush toward a commutator. The brush assembly also includes a brush guide having a passageway portion formed to guide the carbon brush. A spring retainer is slidingly received within the brush guide and is disposed between the carbon brush and the biasing spring. An enlarged portion of the spring retainer cooperates with an annular shoulder formed within the brush guide to form a stop surface to limit rectilinear movement of the spring retainer within the brush guide and consequently the biasing spring when the brush is substantially worn out.

REFERENCES:
patent: 3308321 (1967-03-01), Provost, Jr.
patent: 3339098 (1967-08-01), Burrows
patent: 3784856 (1974-01-01), Preston
patent: 3955113 (1976-05-01), Hillyer
patent: 4074162 (1978-02-01), Parzych
patent: 4266155 (1981-05-01), Niemela
patent: 4297605 (1981-10-01), Tak
patent: 4553057 (1985-11-01), Saeed

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