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:
Sep. 27, 2016
Filed:
Mar. 11, 2013
Ryota Shimura, Tokyo, JP;
Daisuke Yamada, Tokyo, JP;
Ryota Shimura, Tokyo, JP;
Daisuke Yamada, Tokyo, JP;
Kabushiki Kaisha Somic Ishikawa, Tokyo, JP;
Abstract
A braking device capable of effectively causing a shearing stress of a magnetorheological fluid to act on both surfaces of the rotation body is provided. The present invention provides a braking device including a first soft magnetic material (), a coil () attached to the first soft magnetic material (), a second soft magnetic material (), a activation chamber () formed between the first soft magnetic material () and the second soft magnetic material (), and a rotation body () provided inside of the activation chamber (), and a magnetorheological fluid () filling a gap between the rotation body () and the first soft magnetic material () and a gap between the rotation body () and the second soft magnetic material (), wherein the rotation body () includes low magnetoresistive parts () made of a soft magnetic material and a high magnetoresistive part () in which a magnetic flux is less likely to flow, and the high magnetoresistive part () is provided at a portion of the rotation body () facing the coil ().