Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
RUN FLAT TIRE
Document Type and Number:
WIPO Patent Application WO/2019/123973
Kind Code:
A1
Abstract:
Provided is a run flat tire comprising, in order to enable the improvement of shock burst performance while securing the run flat durability of the run flat tire 1 and also to reduce the rolling resistance, a belt reinforcing layer 40, which is disposed on the outer side in the tire radial direction of a belt layer 14, and a side reinforcing rubber 50 disposed in a sidewall portion 8. When a region in the tread portion 2 where a center land portion 21, which is a land portion 20 that is the closest to a tire equatorial plane CL among the land portions 20, is located is taken as a center area Ac, the belt reinforcing layer 40 has a center reinforcing portion 41, which is a portion where the number of stacked sheets is larger than that at the position other than the center region Ac, at the position of the center region Ac, and the belt reinforcing layer 40 has a width Wc of the center reinforcing portion 41 in the tire width direction within the range 0.5Gr ≤ Wc ≤ 2.0Gr relative to the thickness Gr of the side reinforcing rubber 50 at the tire maximum width position P.

Inventors:
UEMURA TAKANORI (JP)
Application Number:
JP2018/043265
Publication Date:
June 27, 2019
Filing Date:
November 22, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
B60C17/00; B60C9/08; B60C9/22; B60C11/00
Foreign References:
JP2011195046A2011-10-06
JP2006199224A2006-08-03
JP2004359145A2004-12-24
JP2004322718A2004-11-18
JP2001080320A2001-03-27
JP2013220718A2013-10-28
JP2015020467A2015-02-02
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
Download PDF: