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. 23, 1980
Filed:
Jun. 16, 1978
Georges J Schmit, Bridel, LU;
Thomas N Welter, Keispelt, LU;
The Goodyear Tire & Rubber Company, Akron, OH (US);
Abstract
A radial spare tire which, upon inflation, stretches from a shape having a reduced diameter adjacent the wheel rim on which the tire is mounted, to a regularly sized radial tire which the spare tire is designed to replace. The tire is molded and vulcanized in an unstretched configuration of reduced size. The stretching of the tire is made possible by the utilization in the carcass and belt plies of reinforcement cords which, during the processing of the cord and building of the tire, have a relatively high modulus of elasticity. When the cords are subjected to vulcanization temperatures, they lose their strength and have a low modulus of elasticity to permit the stretching of the tire to a regular size. The cords then develop a high modulus of elasticity in the stretched condition to provide the required reinforcement of the tire in the inflated regular size condition.