Tire
AssigneeBridgestone Europe NV/SA
InventorsLuca Spiri, Brenda Cecilia Barrios Perez
Life of this patent
Estimating the term…
Abstract
The present invention relates to a tyre (1) comprising: —a carcass (5); —at least one high elongation belt (1, 2, 3, 4), being applied as a single cord externally to said carcass (5); and —an external tread portion (6), provided with two or more grooves (7) extending according to a circumferential direction (L) around said tread portion (6), wherein the axial width (Wg) of at least one of said grooves (7), measured according to an axial direction (A) parallel to an axis of rotation (R) of said tyre (10) and orthogonal to said circumferential direction (L), is at most equal to 2 millimeters.
Claims15
A tire comprising:
- a carcass;
- a first belt, a second belt, a third belt, and a fourth belt radially superimposed to each other, wherein the first belt is at an innermost position and the fourth belt is at an outermost position with respect to the other belts, each of the first to fourth belts having a respective belt cord angle, wherein at least one of the first to fourth belts is a high elongation belt applied as a single cord strip radially externally to said carcass, said high elongation belt embedding a cord provided with a stiffness module variable between about 3,000 MPa for a strain value of said cord ranging from 0 to about 2% and 125,000 MPa for a strain value of said cord higher than about 2%;
- and
- an external tread portion provided with two or more grooves extending according to a circumferential direction around said tread portion, wherein an axial width of each of the two or more grooves, measured according to an axial direction parallel to an axis of rotation of said tire and orthogonal to said circumferential direction, is equal to or lower than 2 millimeters,
- wherein:
- the first belt cord angle equals from 35° to 40° measured counterclockwise from the circumferential direction;
- the second belt cord angle equals about 0° from the circumferential direction;
- the third belt cord angle equals from 20° to 28° measured clockwise from the circumferential direction;
- and
- the fourth belt cord angle equals from 40° to 60° measured counterclockwise from the circumferential direction.
Dependencies are inferred from the claim text.