Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic -co- compound
Reexamination Certificate
2004-05-24
2011-10-25
Caldarola, Glenn (Department: 1771)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic -co- compound
C508S552000, C508S367000, C508S162000, C508S528000, C508S363000
Reexamination Certificate
active
08044005
ABSTRACT:
A rolling bearing, for use in household appliances, having a high degree of quietness, an excellent durability at high temperatures and rotational speeds, a low torque, and excellent fretting property; and a lubricant composition which can be sealed into the rolling bearing. The lubricant composition includes a base oil and a thickening agent. The base oil is a mixed oil having the following characteristics of (a) to (c): (a) The base oil consists essentially of a synthetic hydrocarbon oil and an ester oil; (b) A kinematic viscosity of the mixed oil at 40° C. is 40 to 70 mm2/second; (c) A mixing weight ratio between the ester oil of the mixed oil and the synthetic hydrocarbon oil thereof is 30:70 to 70:30. The thickening agent comprises a diurea compound shown by a formula (1):where R1and R3are a straight-chain alkyl groups having 9 to 22 carbon atoms respectively, and R2is an aromatic hydrocarbon group having 6 to 15 carbon atoms. The lubricant composition is sealed into the rolling bearing.
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Iwamatsu Hiroki
Mikami Hidenobu
Mitsuoka Masashi
Okamura Seiji
Caldarola Glenn
Costigan James V.
Hedman & Costigan ,P.C.
NTN Corporation
Vasisth Vishal
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