Abrasion-resistant bearing of motor type fuel pump
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United States of America Patent
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Issued Date -
Jun 8, 2006
app pub date -
Apr 14, 2004
filing date -
Apr 23, 2003
priority date (Note) -
Abandoned
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Abstract
A wear resistant bearing of a motor-type fuel pump includes a sintered body of compacted powders having a blended composition which is composed of 1 to 5% of graphite, 2 to 9% of Cu--P alloy containing 5 to 10% of P, Cu--Ni alloy containing 21 to 26% of Ni, and the balance, in % by weight. The sintered body made of a Cu--Ni based sintering metal has a structure in which pores are dispersed on a basis material of Cu--Ni alloy particles at a porosity within a range of 8 to 18%, and P components and free graphite are distributed on a boundary between the Cu--Ni alloy particles and in the pores, respectively.
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