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:
Dec. 20, 1994
Filed:
Apr. 13, 1990
Yasutaka Enoki, Sayama, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A heavy duty pneumatic tire including in its tread at least one circumferential main groove and shoulder rib grooves spaced from the circumferential main groove and arranged in the proximity of tread ends to define shoulder rib grooves. The shoulder rib grooves are formed to fulfill relationships of Rw/W=0.28-0.42, Rs/W=0.05-0.12 and Rd/W=0.07-0.19, where a distance from an equatorial plane to the tread end of the tire is W mm, a distance from the tread end to the shoulder rib groove is Rw mm, a width of the shoulder rib groove is Rs mm and a depth of the shoulder rib groove is Rd mm. Angles .alpha. and .beta. made by normal lines to surfaces of the tread and opposite walls of the shoulder rib grooves are in relations -7.degree..ltoreq..alpha. and .beta..ltoreq.7.degree., respectively.