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. 27, 2010
Filed:
Nov. 29, 2006
Osamu Kurosawa, Yokohama, JP;
Masato Takahashi, Yokohama, JP;
Toru Matsuoka, Yokohama, JP;
Kazuo Yamamori, Nagoya, JP;
Koji Saito, Nagoya, JP;
Tetuzo Yoneda, Nagoya, JP;
Yoshikazu Yamamoto, Nagoya, JP;
Akihiko Ichikawa, Nagoya, JP;
Osamu Kurosawa, Yokohama, JP;
Masato Takahashi, Yokohama, JP;
Toru Matsuoka, Yokohama, JP;
Kazuo Yamamori, Nagoya, JP;
Koji Saito, Nagoya, JP;
Tetuzo Yoneda, Nagoya, JP;
Yoshikazu Yamamoto, Nagoya, JP;
Akihiko Ichikawa, Nagoya, JP;
Nippon Oil Corporation, Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
Provided is a lubricating oil composition for manual transmissions which has anti-seizure properties for shift forks and can provide manual transmissions with excellent shifting characteristics though it has a low viscosity and can save fuel to be used in automobiles. The lubricating oil composition for manual transmissions comprises a lubricating base oil with a kinematic viscosity at 100° C. of 4 to 6 mm/s, on the basis of the total mass of the composition, (A) 0.14 to 0.20 percent by mass in terms of magnesium of magnesium sulfonate, (B) 0.14 to 0.18 percent by mass in terms of zinc of a specific zinc dithiophosphate, (C) 0.3 to 0.5 percent by mass in terms of sulfur of a sulfur-containing extreme pressure additive other than zinc dithiophosphate, and (D) 0.02 to 0.05 percent by mass in terms of phosphorus of an alkyl phosphite, and having a kinematic viscosity at 40° C. of 25 to 30 mm/s.