Fluid bearing unit and lubricating oil composition for bearing

Details Fluid bearing unit and lubricating oil composition for bearing Fluid bearing unit and lubricating oil composition for bearing

2005-06-07

2005-06-07

McAvoy, Ellen M. (Department: 1764)

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Organic -co- compound

C508S100000, C384S012000, C384S013000

Reexamination Certificate

active

06903056

ABSTRACT:
There is provided a durable low-torque lubricating oil for bearings and fluid dynamic bearings, porous oil-impregnated bearings and hydrodynamic type porous oil-impregnated bearings suitable for use as bearings in small-sized spindle motors for information equipment. The lubricating oil composition comprising (A) a diester of a monovalent aliphatic alcohol containing 6-10 carbon atoms and a saturated aliphatic dicarboxylic acid containing 10 carbon atoms as base oil and (B) 3-20% by weight of a low-viscosity lubricating oil with a kinematic viscosity of less than 11 mm2/s at 40° C., a fluid dynamic pressure bearing unit or a porous oil-impregnated bearing unit containing said lubricating oil composition or a spindle motor provided with said bearing unit.

REFERENCES:
patent: 2922763 (1960-01-01), Tierney
patent: 5286397 (1994-02-01), Schmid et al.
patent: 6258762 (2001-07-01), Akiyama
patent: 6335310 (2002-01-01), Suekuni et al.
patent: 04-357318 (1992-12-01), None
patent: 08-259977 (1996-10-01), None
patent: 2000-063860 (2000-02-01), None

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