Commutator for motor using amorphous carbon and fuel pump unit u

Details Commutator for motor using amorphous carbon and fuel pump unit u Commutator for motor using amorphous carbon and fuel pump unit u

1997-11-24

2000-09-05

Enad, Elvin

Electrical generator or motor structure

Dynamoelectric

Rotary

310236, 310237, 310235, H02K 1300

Patent

active

061147915

ABSTRACT:
In a motor for driving a fuel pump, each contact part of a commutator which slidingly contacts brushes is made of a carbon material. The carbon material is a mixture of natural carbon and amorphous carbon so that the contact part has a longer durability. The weight percentage of the amorphous carbon to be mixed is in the range of 5-30, most preferably about 20. The brush may also be made of a mixture of natural carbon and amorphous carbon.

REFERENCES:
patent: 4757721 (1988-07-01), Horner et al.
patent: 5175463 (1992-12-01), Farago et al.
patent: 5245240 (1993-09-01), Takasaki
patent: 5255426 (1993-10-01), Farago et al.
patent: 5283494 (1994-02-01), Frank et al.
patent: 5634800 (1997-06-01), Giamati
patent: 5879747 (1999-03-01), Murakami et al.
U.S. Ser. No. 720,153, Matsumoto et al., filed Sep. 25, 1996.

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