Carbon brush with raw graphite particles

Details Carbon brush with raw graphite particles Carbon brush with raw graphite particles

2005-08-01

2011-10-11

Leung, Quyen (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S248000, C310S249000, C310S251000, C310S252000

Reexamination Certificate

active

08035272

ABSTRACT:
A rotating electrical machine, which is a direct current motor, includes carbon brushes. Each carbon brush contains graphite grains, metal particles, and solid lubricant, which are sintered in a dispersed state. The graphite grains are each formed of granulated substance of raw graphite particles, and the particle diameters of the graphite grains are within a range of 60 to 280 μm. The surface of the granulated substance is coated with amorphous carbon made of carbides of organic binder. A plurality of holes are formed in each carbon brush. The dimension (maximum dimension) of the holes is less than half the average particle diameter of the raw graphite particles.

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International Search Report of Application No. PCT/JP2005/014466 dated Dec. 14, 2005.

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