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:
Nov. 25, 2025
Filed:
Nov. 01, 2023
Applicant:
Somar Corporation, Tokyo, JP;
Inventors:
Hirohisa Ishizaki, Tokyo, JP;
Akira Ochiai, Tokyo, JP;
Assignee:
SOMAR CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M 127/06 (2006.01); C10M 105/38 (2006.01); C10M 107/02 (2006.01); C10M 111/04 (2006.01); C10M 125/12 (2006.01); C10M 125/26 (2006.01); C10M 141/00 (2006.01); C10M 155/02 (2006.01); C10M 161/00 (2006.01); C10M 169/04 (2006.01); F16F 9/53 (2006.01); H01F 1/44 (2006.01); C10N 40/08 (2006.01); C10N 40/14 (2006.01);
U.S. Cl.
CPC ...
C10M 169/044 (2013.01); C10M 105/38 (2013.01); C10M 107/02 (2013.01); C10M 111/04 (2013.01); C10M 125/12 (2013.01); C10M 125/26 (2013.01); C10M 127/06 (2013.01); C10M 141/00 (2013.01); C10M 155/02 (2013.01); C10M 161/00 (2013.01); H01F 1/44 (2013.01); C10M 2201/064 (2013.01); C10M 2201/102 (2013.01); C10M 2203/06 (2013.01); C10M 2205/0206 (2013.01); C10M 2207/2835 (2013.01); C10M 2229/02 (2013.01); C10N 2040/08 (2013.01); C10N 2040/185 (2020.05);
Abstract
The present invention provides a magnetic viscous fluid and a mechanical device with both improved drag force during excitation and improved rubber-resistant properties. The magnetic viscous fluid comprises a magnetic particle and base oil, wherein the base oil comprises ester base oil and non-polar base oil, and a non-polarity index of the base oil is in the range of 10 to 45.