Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Inorganic compound
Reexamination Certificate
2011-03-22
2011-03-22
Caldarola, Glenn (Department: 1771)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Inorganic compound
C508S166000, C508S363000, C508S586000, C508S552000
Reexamination Certificate
active
07910526
ABSTRACT:
The present invention provides a grease composition for use in constant velocity joints, which comprises the following components (a) to (g) and a constant velocity joint comprising the grease composition sealed or encapsulated therein:(a) a base oil;(b) a diurea thickener represented by the following general formula:in-line-formulae description="In-line Formulae" end="lead"?R1NH—CO—NH—C6H4-p-CH2—C6H4-p-NH—CO—NHR2in-line-formulae description="In-line Formulae" end="tail"?wherein R1and R2each independently represents an alkyl group having 8 to 20 carbon atoms, an aryl group having 6 to 12 carbon atoms or a cycloalkyl group having 6 to 12 carbon atoms;(c) a molybdenum dialkyl dithiocarbamate insoluble in the base oil;(d) a molybdenum dialkyl dithiocarbamate soluble in the base oil;(e) molybdenum disulfide;(f) at least one member selected from the group consisting of calcium phenate and calcium sulfonate; and(g) a sulfur-containing extreme-pressure agent free of phosphorus.The grease composition can efficiently prevent a temperature rise of a constant velocity joint and can impart excellent durability to the joint.
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Ishijima Minoru
Kakizaki Mitsuhiro
Okaniwa Takashi
Takabe Shinichi
Caldarola Glenn
Goloboy Jim
Kyodo Yushi Co. Ltd.
Nixon & Vanderhye P.C.
NTN Corporation
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