Ralph Terrance Zimmer

US Patent:

42465087, Jan 20, 1981

Filed:

Dec 22, 1978

Appl. No.:

5/972227

Inventors:

Ralph O. Zimmer - Chicago IL

Assignee:

Skil Corporation - Chicago IL

International Classification:

H02K 1300

US Classification:

310242

Abstract:

Brush holder assemblies are disclosed which prevent the spring, or conductor and terminal connector from protruding out of the brush holder and damaging the motor commutator. The constructions employ a brush housing having a restraining bridge at the front end thereof and a terminal connector having a rearwardly extending flange. As the brush wears down, it and the terminal connector to which it is attached move forwardly in the brush housing under bias of a coil spring. Upon striking the restraining bridge the terminal connector pivots forwardly under tension of the spring thereby wedging the flange against the top of the housing preventing further movement of the brush assembly.