Carbon brush for electric fuel pumps

Details Carbon brush for electric fuel pumps Carbon brush for electric fuel pumps

1999-02-03

2000-07-18

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310251, H02K 1310, H01R 3926

Patent

active

060911786

ABSTRACT:
An improvement to an electric fuel pump which includes an electric motor with a rotating commutator defining an axial direction, a radial direction and a tangential direction, and having a circumferential surface, and a carbon brush having a contact surface contacting the circumferential surface of the commutator. The brush includes a gap extending from the contact surface in a radial direction and further extending through the brush in the axial direction, the gap reducing flotation of the carbon brush caused by a layer of fuel drawn between the carbon brush and the commutator. In an alternate embodiment, the brush includes a pressure relief hole extending from the contact surface completely through the brush in the radial direction.

REFERENCES:
patent: 1028964 (1912-06-01), Press
patent: 1352408 (1920-09-01), Hood
patent: 2153049 (1939-04-01), Myers
patent: 3467846 (1969-09-01), Reille
patent: 3590300 (1971-06-01), Moberly
patent: 5083055 (1992-01-01), Hokanson
patent: 5402027 (1995-03-01), Strobl
patent: 5414319 (1995-05-01), Nowicki et al.

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