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:
Apr. 10, 2001
Filed:
May. 03, 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
A wear resistance index G,of a tire whose wear life is to be estimated is measured by the Lambourn abrasion tester. Then, friction energies in free rolling, when the tire is fitted with a toe angle, under application of a side force, under application of a braking force and under application of a driving force of the tire are measured. An expected value of the wear life T,is calculated using the wear resistance index G,and the friction energies thus obtained and the wear life of the tire is estimated on the basis of the expected value of the wear life T,. The wear life of a tire can be estimated accurately in a short time in accordance with the method for estimating a tire wear life of the present invention.