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. 01, 1989
Filed:
Sep. 23, 1987
Tetsuhito Tsukagoshi, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
To prevent bead displacement under heavy load or to improve bead durability without increasing tire weight and decreasing tire productivity, the carcass is sandwiched between two reinforcing layers near the bead in such a way that metallic cords of the carcass and the two reinforcing layers, extending in three different directions, provide a triangular reinforcement structure. The radial distance H.sub.1 of the first reinforcing layer from the rim is 0.3 to 0.7 H (where H denotes a radial distance between the rim and the maximum tire width position); the radial distance H.sub.2 of the first reinforcing layer is 0.25 to 0.6 H; the radial distance H.sub.3 between H.sub.1 and H.sub.2 is 0.05 H or more; and the radial overlap distance .alpha. between two reinforcing layers is 0.1 H or more. Further, the overlap length l between the two layers is 0.25 L or more (where L denotes the width of the first reinforcing layer).