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:
Feb. 11, 2025
Filed:
Mar. 08, 2022
Uchiyama Manufacturing Corp., Okayama, JP;
Kyodo Yushi Co., Ltd., Kanagawa, JP;
Masanori Shibayama, Okayama, JP;
Koki Ando, Kanagawa, JP;
Hiroyuki Saito, Kanagawa, JP;
Michitaka Yoshihara, Kanagawa, JP;
UCHIYAMA MANUFACTURING CORP., Okayama, JP;
KYODO YUSHI CO., LTD., Kanagawa, JP;
Abstract
There is provided a grease composition which is supplied between a plurality of lips provided in a sealing device that seals between a pair of members that rotate relative to each other, wherein the grease composition comprises a base oil (A), a thickening agent (B) and a rust preventive agent (C); a kinematic viscosity of the base oil (A) at 40° C. is 30 to 80 mm/s; the thickening agent (B) is a diurea compound represented by Formula (1); and the composition comprises 5 to 15% by mass of the thickening agent (B) and 0.1 to 2.0% by mass of the rust preventive agent (C) based on the total of the grease composition.R—NHCONH—R—NHCONH—R (1) wherein Ris a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms, and Rand Rare a linear or branched alkyl group having 8 to 22 carbon atoms. Thus, a grease composition is provided, which can suppress a torque difference due to a rotation direction and exhibits excellent sealing properties.