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:
Apr. 21, 1981
Filed:
May. 14, 1979
Wolfgang Hanke, Vienna, AT;
Semperit Aktiengesellschaft, Vienna, AT;
Abstract
A tread for a pneumatic tire comprising two inner ribs extending in the circumferential direction of the tire and, to both sides thereof, tiers or block rows extending in the circumferential direction of the tire. The block rows and ribs are each separated from one another by a respective zig-zag configured circumferential groove. Each leg of the intermediate circumferential groove encloses, with the circumferential direction of the tire, an angle .alpha. of approximately 30.degree. to 50.degree., whereas the legs of the lateral circumferential grooves enclose, with the circumferential direction of the tire, an angle .beta. of approximately 55.degree. to 65.degree. and the lateral circumferential grooves are each wider than the intermediate circumferential groove.