Metal-graphite brush and motor including a metal-graphite brush
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United States of America Patent
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-
May 2, 2006
Grant Date -
Oct 27, 2005
app pub date -
Apr 18, 2005
filing date -
Apr 27, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A metal-graphite brush for supplying electricity to a coil wound around a core provided at a rotor of a motor is made of sintered material having porosities at a surface of, or inside, the sintered material. The metal-graphite brush is infiltrated by a liquid containing a plurality of kinds of glycol ether having varying numbers of alkylene oxide structure units. The liquid has a boiling point higher than that of water.
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