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:
Apr. 22, 2014
Filed:
Oct. 05, 2007
Yukitoshi Fujinami, Ichihara, JP;
Tahei Okada, Ichihara, JP;
Shinya Nakatani, Fujisawa, JP;
Atsushi Yokouchi, Fujisawa, JP;
Yukitoshi Fujinami, Ichihara, JP;
Tahei Okada, Ichihara, JP;
Shinya Nakatani, Fujisawa, JP;
Atsushi Yokouchi, Fujisawa, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
A grease which comprises a base oil containing at least 50% by mass of a diester compound having a total carbon number of 28 to 40 and represented by the general formula (I):ROOC—(R)—COOR  (I)wherein Rand Reach independently represent a Cto Cmonovalent aliphatic hydrocarbon group, Rrepresents a Cto Cdivalent hydrocarbon group and n is 0 or 1. The grease is excellent in both low-temperature performance and high-temperature performance and has low oil separation tendency even under high centrifugal force (acceleration). In particular, when the grease is used in a rotational transmission device having a built-in one-way clutch, the grease can provide satisfactory clutch engagement property (intermeshing ability) at low temperatures and a prolonged bearing life at high temperatures and is less apt to cause oil separation under high centrifugal force.