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:
Oct. 26, 2021
Filed:
Dec. 14, 2017
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Atsushi Miyajima, Hiratsuka, JP;
The Yokohama Ruber Co., Ltd., Tokyo, JP;
Abstract
A loss tangent tan δ is the ratio between a storage modulus and a loss modulus calculated from a stress when vibrations of a predetermined frequency are applied to a rubber member. When evaluating a shock resistance performance of the rubber member using an elongation at break Eb, a tensile strength at break TSb, and a loss tangent tan δ of the rubber member, a speed of an impact applied under use conditions of the rubber member is matched with a maximum speed of vibrations. As a result, the shock resistance performance can be evaluated using a value of the loss tangent tan δ corresponding to an impact actually applied to the rubber member, and it is possible to improve the accuracy of the shock resistance performance evaluation.