Lubricating oil for dynamic fluid-pressure bearing, dynamic-fluid-pressure bearing, motor, and information recording/reproducing apparatus
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United States of America Patent
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Issued Date -
Nov 9, 2006
app pub date -
Jun 25, 2004
filing date -
Jun 27, 2003
priority date (Note) -
Abandoned
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Abstract
This lubricant for a fluid dynamic bearing has a base oil containing a phosphate triester represented by a general formula (I) (wherein, R.sub.A, R.sub.B and R.sub.C respectively represent alkyl groups), wherein in the base oil, a phosphate triester in which the three alkyl groups in the general formula (I) are saturated hydrocarbon groups and number of carbon atoms of one of the three saturated hydrocarbon groups differs from number of carbon atoms of the other two saturated hydrocarbon groups is contained as a primary base oil.
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