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:
Mar. 25, 2008
Filed:
Aug. 06, 2004
Masatoshi Tanaka, Kobe, JP;
Masatoshi Tanaka, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
A runflat tire system comprising a pneumatic tire, a wheel rim and a support ring disposed in a tire cavity is disclosed, wherein the wheel rim comprises a pair of axially spaced bead seats, and a support-ring seat between the bead seats; the support ring has an inner circumferential surface fitting to the above-mentioned support-ring seat, and an outer circumferential surface contacting with the inside of a tread portion of the tire mounted on the wheel rim when the tire is deflated; and one of or alternatively each of the support-ring seat and the inner circumferential surface is provided with an ordered uneven surface which can reduce a friction in the axial direction between the inner circumferential surface and the support-ring seat, while maintaining or increasing the friction in the circumferential direction.