The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2011
Filed:
Dec. 23, 2005
Toshihiro Asakura, Okazaki, JP;
Yasushi Kawamura, Tokyo, JP;
Hirofumi Kuwabara, Kariya, JP;
Takahiro Ozaki, Tokyo, JP;
Shigeyuki Sugimori, Kariya, JP;
Keiji Tanaka, Tokyo, JP;
Toshihiro Asakura, Okazaki, JP;
Yasushi Kawamura, Tokyo, JP;
Hirofumi Kuwabara, Kariya, JP;
Takahiro Ozaki, Tokyo, JP;
Shigeyuki Sugimori, Kariya, JP;
Keiji Tanaka, Tokyo, JP;
Shell Oil Company, Houston, TX (US);
Abstract
A urea-based lubricating grease composition comprising (a) as a thickener, a diurea compound which is an alkyldiurea compound having an average molecular weight in the range of from 600 to 700, wherein in the range of from 25 to 60 mole % of the total alkyl groups is an unsaturated component, and the total amine value of the primary amine constituting the raw material is in the range of from 250 to 350, (b) a base oil having as its main component one or more synthetic hydrocarbon oil(s) having a pour point of −40° C. or below, wherein the kinematic viscosity of the base oil is 6000 mm/sec or less at −40° C., and (c) as additives, a mixture comprising an oil-soluble organic molybdenum complex, an oil-soluble organic zinc compound of dithiocarbamic acid, an oil-soluble organic zinc compound of dithiophosphoric acid and an inorganic sulphur compound; and a roller bearing and electric power steering device wherein the said lubricating grease composition is used as the lubricant.