Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Compagnie Generale Des Establissements Michelin

Catherine Houis

Mathieu Vandaele

William Licence

Damien Bardin

Vincent Martin

Patrick Vervaet

Philippe Brochet

Delphine Ouvray

Elisabeth Michaudet

Gabriel Veniant

The tread pattern of a tire for a vehicle for agricultural use comprises two rows of lugs (R, R), a first row being made up of a circumferential distribution of at least two families of lugs, over one revolution of the wheel; a first family is reproduced with a shortest spacing S, and a second family is reproduced with a longest spacing L; the tread pattern of the tread is designed such that the distance between the axially outer end of a following lug and the axially inner end at the centre of the tread is referred to as the overlap distance R. The ratio of the shortest spacing S of the family of lugs to the longest spacing L, 'S/L', lies in the range [0.6; 0.8]. The circumferential overlap distance R between the first and second circumferential rows of lugs is constant around the entire circumference of the tire.

Tire for an agricultural vehicle

Tread for heavy vehicle tire, this tread having a tread surface in the new state, this tread comprising a plurality of cuts opening onto the tread surface in the new state and at least one channel internal to the tread, this channel being intended to form a new groove after the tread has partially worn away, furthermore, each channel is extended radially towards the tread surface by a sipe of the same orientation as said channel and of width L, and in addition a plurality of sipes of width Lintersect the sipe extending each channel to form a well, this well opening both onto the tread surface in the new state and into a channel, the tread according to the invention being such that, for at least for a plurality of wells (each well has&#x2014;in a direction extending from the tread surface towards the channel, at least one maximum-section part and one reduced-section part, the reduced-section part having a cross-sectional area smaller than the cross-sectional area of the maximum-section part so as to limit the ingress of foreign bodies of determined dimensions into this well and, from there, into a channel.

Tread and tire for heavy vehicle

Pneumatic tire

Growing community of inventors

Clermont-Ferrand-Cedex, France

Catherine Houis