Miniature motor

Details Miniature motor Miniature motor

1993-06-16

1994-10-18

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310220, 310228, 310 88, H02K 1310, H02K 512

Patent

active

053571592

ABSTRACT:
A miniature motor comprising a case made of a metallic material, formed into a bottomed hollow cylindrical shape and having permanent magnets on the inner circumferential surface thereof, a rotor consisting of an armature facing the permanent magnets and a commutator, and a case cap fitted to an open end of the case and having brushes making sliding contact with the commutator and input terminals electrically connected to the brushes; the rotor being rotatably supported by bearings provided on the bottom of the case and the case cap, in which an internal space defined by the case and the case cap is filled with an atmosphere of one or more than two types of polymethacrylate, polyacrylate, polyisobutylene, low molecular weight polyethylene, low molecular weight polypropylene, ethylene-propylene copolymer, polyvinyl acetate, and polybutene.

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