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:
May. 30, 2017
Filed:
Apr. 16, 2015
Bando Chemical Industries, Ltd., Kobe-shi, JP;
Hisashi Matsuda, Kobe, JP;
BANDO CHEMICAL INDUSTRIES, LTD., Kobe-shi, JP;
Abstract
A power transmission belt is used by being wound around a flat pulley so that an outer peripheral surface thereof contacts with the flat pulley. A portion forming the outer peripheral surface is made of a rubber composition including an ethylene-α-olefin elastomer as a rubber component thereof. The dynamic viscoelasticity properties of the rubber composition in a belt length direction satisfy ((a loss tangent tan δ at a temperature of 25° C. and a dynamic strain of 3.0%)/(a storage elastic modulus E' at a temperature of 25° C. and a dynamic strain 3.0%))×1000≦3.0 MPa, and (a storage elastic modulus E′ at a temperature of 25° C. and a dynamic strain of 1.0%)/(a storage elastic modulus E′ at a temperature of 25° C. and a dynamic strain of 3.0%)≦1.30.