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. 21, 2021
Filed:
Jun. 07, 2019
Applicant:
Sumitomo Rubber Industries, Ltd., Hyogo, JP;
Inventors:
Shinya Nakano, Kobe, JP;
Toshio Tada, Kobe, JP;
Assignee:
SUMITOMO RUBBER INDUSTRIES, LTD., Hyogo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 17/02 (2006.01); B29D 30/00 (2006.01);
U.S. Cl.
CPC ...
G01M 17/022 (2013.01); B29D 30/0061 (2013.01); B29D 2030/0066 (2013.01);
Abstract
A test method of accurately evaluating wear resistance performance of a rubber material when used as a tread rubber of a tire, comprises the steps of: preparing a test piece of the rubber material having a ground contact surface extending in a circumferential direction; abrading the ground contact surface by rolling the test piece on a running surface of a wear testing machine at a slip ratio of not more than 3.5%; and evaluating the wear resistance performance of the test piece by comparing the amount of wear of the test piece with a predetermined threshold value.