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:
Sep. 27, 1988
Filed:
Jun. 04, 1987
Masataka Yamaoka, Saitama, JP;
Misao Kawabata, Saitama, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
In a pneumatic low section tire with an aspect ratio (height/width) of 0.65 or less, when a green tire is pressurized with a bladder within a mold, tread rubber is forced to flow into recesses for forming a tread block pattern. With this rubber flow, the belt is subjected to deformation toward the same recesses, so that the belt layer deforms outward at the middle of the transversal grooves between two main circumferential grooves. This deformation causes the skid base rubber existing between the transversal groove bottom and the belt layer to be thin at the middle of the transversal grooves, thus resulting in an early trouble. To overcome this problem, the transversal grooves are formed in raised bottom or corrugation fashion along a longitudinal direction thereof, to obtain a uniformly thick skid base. Further, this raised bottom serves to increase the drainage effect during rainy weather running.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile