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:
Aug. 13, 2019
Filed:
Nov. 16, 2012
Kyodo Yushi Co., Ltd., Fujisawa-shi, Kanagawa, JP;
Yokohama National University, Yokohama-shi, Kanagawa, JP;
Hiroshi Kimura, Fujisawa, JP;
Shinya Kondo, Fujisawa, JP;
Tetsuo Ogawa, Fujisawa, JP;
Makoto Hayama, Fujisawa, JP;
Koji Maesaka, Fujisawa, JP;
Shin Morishita, Yokohama, JP;
Ken Nakano, Yokohama, JP;
Toshihiko Shiraishi, Yokohama, JP;
KYODO YUSHI CO., LTD., Fujisawa, JP;
YOKOHAMA NATIONAL UNIVERSITY, Yokohama, JP;
Abstract
The invention provides a magneto-rheological grease composition which contains (a) a base oil including at least 30% by mass of an ether type synthetic oil; (b) an aliphatic diurea thickener; and (c) magnetic particles in an amount of 45 to 95% by mass based on the total mass of the composition. The magneto-rheological grease composition can show superior thermal stability, dispersion stability and magneto-rheological properties.