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US 5,463,264 AGranted
Constant force brush holder assembly
AssigneeHelwig Carbon Products, Inc.
InventorJeff D. Koenitzer
Life of this patent
Estimating the term…
Abstract
A brush holder assembly for an electric machine such as a motor that utilizes a constant force spring positioned within a U-shaped retainer to apply a constant force on a brush positioned against the spring within the retainer. The brush, spring and retainer are positioned within a container mounted on the housing of the electric machine. A removable cap is mounted in the radially outer end of the container to maintain the brush and spring in proper position during operation and allow easy removal and replacement of the brush when needed.
Claims5
A brush holder assembly for use with a dynamo electric machine comprising:
- a cylindrical container mounted in a housing of said machine and having an opening extending radially inward toward a commutator of said machine;
- a U-shaped retainer slidably positioned within said container with legs of said U-shaped retainer extending radially inward towards the commutator of said machine;
- inner sides of each of said legs having a recess near ends of said legs;
- a brush positioned between said legs of said retainer;
- a constant force spring positioned between said brush and on inner surface of said retainer;
- said spring having a pair of end coils located in said recesses in the inner surface of said retainer legs and a middle portion for engaging one end of said brush for resiliently urging said brush against the commutator of said dynamo electric machine with a constant force;
- said container having two internal longitudinally extending slots for receiving and positioning said retainer and said brush;
- and
- a removable cap positioned in a radially outer end of said container for keeping said retainer, spring and brush within said container during operation of said machine.
6 more elements
Dependencies are inferred from the claim text.