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:
Feb. 03, 1976
Filed:
Jul. 15, 1974
Peter L Stang, Bellevue, WA (US);
Joel V Van Ornum, Kirkland, WA (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A vehicle tire is disclosed having an internal circumferential layer of self-sealing composition on an internal surface, particularly behind the tire tread. The sealant layer is initially made up of the combination of specific quantities of a high molecular weight curable butyl rubber, a low molecular weight curable butyl rubber, a liquid polybutylene tackifier, a partially hydrogenated block copolymer of styrene and a conjugated diene, carbon black and suitable curing agents for the butyl rubber components. When cured, this sealant layer effectively heals most punctures one-quarter inch in diameter or less in a vehicle tire at temperatures over the range of about - 20.degree. F. to 270.degree. F. without significant loss of air.