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:
Aug. 07, 2001
Filed:
May. 06, 1999
Akiyoshi Shimizu, Kodaira, JP;
Naoto Yamagishi, Kodaira, JP;
Hiroshi Mouri, Kodaira, JP;
Naohiro Sasaka, Kodaira, JP;
Hiroshi Kobayashi, Toyota, JP;
Tetsunori Haraguchi, Toyota, JP;
Kohshi Katoh, Toyota, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
The present invention provides a method for estimating a tire wear life which enables estimation of the tire wear life accurately in a short time. In this method, a rubber index Gi of a rubber test piece which is made of the same material as the material used in the tire tread portion of the tire whose tire wear life is to be estimated is measured using an abrasion tester which can be operated under a slip ratio of about 0.5 to 5% (step,). Then, friction energies of the tire in free rolling, in a state in which the tire is provided with a toe angle, in a state in which a side force is applied to the tire, in a state in which a driving force is applied to the tire and in a state in which a braking force is applied to the tire are measured (step,), respectively. An expected value of the tire wear life T1 is calculated from the rubber index Gi and the friction energies obtained above (step,). The tire wear life is estimated from the expected value of the tire wear life T1 thus obtained (step,).