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:
Mar. 30, 1993
Filed:
Nov. 14, 1990
Maurice Graas, Reichlange, BE;
Jan H Van Tuyl, Ettelbruck, NL;
The Goodyear Tire & Rubber Company, Akron, OH (US);
Abstract
A winter type tire tread (11) comprises an uneven number of, but at least three, circumferentially extending axially spaced grooves (4-6) and a plurality of zig-zag shaped grooves (36, 37) disposed circumferentially about the tire in a repetitive manner and extending across the tread from the equatorial plane (EP) towards the lateral edges (TE.sub.1, TE.sub.2) of the tire. The zig-zag shaped grooves (36, 37) situated on one side of the equatorial plane (EP) are symmetrical to those situated on the opposite side of the equatorial plane. The circumferentially and laterally extending grooves (4-6, 36, 37) define block elements (20-23), arranged in circumferentially extending rows (30-33) and having each at least in part the shape of a parallelogram. A plurality of sipes (15) are incorporated in each block element.