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:
Nov. 18, 1997
Filed:
Dec. 27, 1994
Hideaki Sugihara, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Hyogo-ken, JP;
Abstract
A pneumatic tire has a tread part with two wide circumferential grooves extending in either side of the tire's equator so as to divide the tread part into a pair of shoulder parts and a central part. The central part has a surface utilizing successive convex curves of a pair of inner groove walls and a central ground-contact surface. When the tire is mounted on a regular rim, inflated with regular internal pressure and applied with normal load, a ground-contacting area Fc where the central part contacts with the ground has a length Lc in the tire's circumferential direction which is 0.9 to 1.1 times a length Ls in the tire's circumferential direction of a ground-contacting area FS where the shoulder part contacts with the ground.