Pirelli Tyre S.p.a.

Pirelli Pneumatici S.p.a.

Diego Ettore Speziari

Stefano Montesello

Vito Bello

Roberto Bolzoni

Giovanni Casarotto

Carlo Ravizza

Giulio Lorenzo Dupre'

Federico Mancosu

Gianfranco Colombo

Maurizio Boiocchi

Giuseppe Matrascia

Anna Paola Fioravanti

Stefano Bizzi

Carlo Monguzzi

Carlo Raffaele Elvio Ravizza

Giulio Lorenzo Dupre′

Giorgio Iodice

Gianmarco Fasano

Andrea Scotti

Pier Luigi De Cancellis

Alberto Maria Putti

Damiano Leonardo Belluzzo

Giulio Lorenzo DuprÉ

A tyre includes at least one block on which at least one complex type sipe is obtained separating the block into two portions having a first surface and a second surface facing each other. The first surface is extended between a set of first and second longitudinal sections having, respectively, a first and a second radial profile, which are symmetrical to each other, each one comprising a coupling portion between the two block portions formed by a protrusion and a recess defined by three consecutive inclined lengths, the pattern of which is such that the ends of the coupling portion are offset from each other along a direction transverse to the longitudinal direction of the sipe.

Winter tyre

Car tire

Tire

Tire for automobiles

High performance tire

All season tire

A tyre with a tread band having a plurality of blocks. The blocks include three-dimensional sipes extending in a direction incident to an advance direction of the tyre. Each sipe separates a block into a first block portion having a first surface facing the advance direction, and into a second block portion having a second surface facing the direction counter to the advance direction. Male/female couplings are provided between the first and the second block portions, the couplings formed by protuberances on the first surface and extending towards the second block portion, and by recesses on the second surface and extending away from the first block portion. The protuberances formed on the first surface have an apex that is spaced apart from the tread surface by no more than 40% of the depth of the three-dimensional sipe, measured at the apex.

Growing community of inventors

Milan, Italy

Diego Ettore Speziari