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:
Jan. 25, 2011
Filed:
Dec. 06, 2006
Renaud Durand, Bangkok, TH;
Renaud Durand, Bangkok, TH;
Michelin Recherche et Technique S.A., Granges-Paccot, CH;
Abstract
A tread () comprising a plurality of grooves of longitudinal and transverse general orientation (), the grooves of longitudinal orientation comprising main grooves () of depth G and secondary grooves () of depth G' less than the depth G of the main grooves, the central part (C) of the tread, defined axially by two grooves of longitudinal orientation, and of a width of between 0.25 and 0.5 times the width W of the tread, being provided with at least one main groove () of longitudinal orientation and of average depth G. The depth G′ of the secondary grooves () is between 0.4 and 0.6 times the depth G of the main grooves (). The transverse grooves () of the ribs of the central part (C) comprise over at most half of their length a connecting bridge (), the surface radially to the outside of which is at a distance Hc from the running surface of between 0.4 and 0.8 times the depth G of the main grooves. The transverse grooves () of the ribs of each edge (B) comprise over at most half of their length a connecting bridge () which prevents closure of said transverse grooves. The surface radially to the outside is at a distance Hs from the running surface which is at most equal to 0.3 times the depth G of the main grooves.