Bridgestone Corporation

Adriano Tedesco

Mario Sgreccia

Fabrizio Peretti

Takashi Kodama

Massimiliano Alberelli

Paolo Francesco Rizzo

Tread () for agricultural tire () comprising a plurality of lugs protruding from the ground of the tread () in radially outer direction extending at a given inclination angle from a central portion of the tread toward both axial ends of the tread and alternately arranged at given intervals in the circumferential direction on one side and on the other with respect to the equatorial plane of the tire. The lugs () comprising a stepping-in surface () wherein the stepping-in surface () of at least one lug () comprises on its sidewall a first radially outer, concave surface () and a second, radially inner, concave surface () intersecting each other in a transition point (D) when viewed in a circumferential section.

Agricultural tire

Tire tread

It is an object to reduce tire vibration during high-speed travel on paved roads without lowering traction performance in fields. An agricultural machine tire includes: lug blocks disposed in a tread portion and formed alternately on both sides of a tire equatorial plane in a tire circumferential direction; and a central rib extending in the tire circumferential direction and to which end portions of the lug blocks on the tire equatorial plane side are integrally connected, and when a tire width length of the central rib from connecting portions to the tire equatorial plane is taken as a first rib width and a tire width length of the central rib from end edges of the central rib from the connecting portions across the tire equatorial plane to the tire equatorial plane is a second rib width, the width of the first rib is greater than the second rib.

Agricultural machine tire

Tyre tread

A farm vehicle tire () having a tread (), which has a toroidal base surface (), and a number of lugs (), each extending radially outwards from the base surface () and having a front wall () and a rear wall () with respect to a given rolling direction (); the leading edge (), with respect to the rolling direction (), of the section of each lug () along any plane () perpendicular to an axis () of rotation of the tire is in the form of an involute curve outward of the base surface ().

Agricultural tire with tread having lugs

Growing community of inventors

Rome, Italy

Adriano Tedesco