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. 13, 2014
Filed:
Nov. 28, 2006
Fumihiro Shiraishi, Tokyo, JP;
Fumihiro Shiraishi, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A run flat tire which comprises a ply layer () disposed extending toroidally between a pair of bead cores and comprising ply coating rubber and ply cords, an inner liner layer () disposed circumferentially at an inner side of the ply layer, side reinforcing rubber layers () having an approximately crescent-shaped cross section and disposed in side portions of the tire between the ply layer and the inner liner layer and rubber sheets () disposed extending at interface of the ply layer and the side reinforcing rubber layer, wherein relations of t>tand t<tare satisfied when characteristic values of vulcanization obtained in accordance with JIS K6300-2 are represented by tand tfor the ply coating rubber, t, and tfor the side reinforcing rubber and tand tfor the rubber for a sheet. Run flat durability is increased by suppressing crack growth in the side reinforcing rubber layer having an approximately crescent-shaped cross section and increasing peel strength between the ply coating rubber and the side reinforcing rubber, using a general purpose rubber.