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. 23, 2016
Filed:
Oct. 08, 2014
Applicant:
Kurimoto, Ltd., Osaka, JP;
Inventors:
Junichi Noma, Osaka, JP;
Masami Nakano, Miyagi, JP;
Assignee:
Kurimoto, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 27/00 (2006.01); H01F 1/44 (2006.01); F16D 37/02 (2006.01); F16D 37/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/447 (2013.01); F16D 37/02 (2013.01); F16D 2037/007 (2013.01);
Abstract
A magneto-rheological fluid includes a magnetic particle mixture, and a dispersion medium for dispersing the magnetic particle mixture. The magnetic particle mixture contains the first magnetic particles and the second magnetic particles. The first magnetic particles have an average particle diameter of 1 μm or more and 30 μm or less. The second magnetic particles are particles of a soft magnetic material, and have an average particle diameter of 50 nm or more and 200 nm or less. A ratio of the second magnetic particles in the magnetic particle mixture is 10% by mass or more and 40% by mass or less.