Metal-filled graphite for miniature motors and method of making

Details Metal-filled graphite for miniature motors and method of making Metal-filled graphite for miniature motors and method of making

1990-08-07

1993-07-13

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310248, H02K 1300, H01R 3924

Patent

active

052276899

ABSTRACT:
A metal-filled gaphite brush used for a miniature motor, which has a permanent magnet field and is caused to rotate through current commutation via a commutator, formed by bonding graphite powder and used for making sliding contact with the commutator for current commutation, in which the metal-filled graphite brush is formed by pressure-forming and sintering a mixture of highly purified graphite powder and metal powder; the graphite powder used for the metal-filled graphite brush being purified to reduce the ash content thereof 0.05 wt. %, and the method of making the same.

REFERENCES:
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patent: 3719608 (1973-03-01), Olstowski
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patent: 4157978 (1979-06-01), Llenado
patent: 4637884 (1987-01-01), Miyazaki et al.
patent: 4720349 (1988-01-01), Kobayashi et al.
patent: 4756841 (1988-07-01), Buran et al.
patent: 5085806 (1992-02-01), Yasutomi et al.

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