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:
Aug. 07, 1990
Filed:
Oct. 22, 1987
Hiroshi Ogawa, Higashiyamato, JP;
Bridgestone Corporation, Kyo, JP;
Abstract
To maintain excellent antiwet skidding performance and good tire external appearance until a radial tire for heavy-duty road vehicles serves its time, a plurality of narrow grooves (40) are formed along at least longitudinal direction of each of plural platforms arranged at intervals in circumferential direction of each of land portions formed between two main circumferential grooves, in order to separate the platform from the tire land portion. This is because the narrow grooves serve to decrease the rigidity of the platforms and therfore to allow the platforms to be more slidably movable relative to the ground to increase abrasion rate on the platform surface, thus maintaining a height difference between the tire land portions and the platforms.