Patent ID: 11858295
Assignee: PIRELLI TYRE S.P.A.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A tyre having a tread band comprising:
a central annular portion, located across an equatorial plane (X-X), and two shoulder annular portions, separated from the central annular portion by two circumferential grooves; the central annular portion having at least one circumferential row of central blocks, comprising a plurality of central blocks, and at least two rows of lateral blocks, opposed to each other relative to the at least one circumferential row of central blocks, and comprising a plurality of lateral blocks, wherein the central blocks have a first and a second portion located opposite to each other relative to the equatorial plane (X-X);
the central blocks and the lateral blocks have a circumferential dimension greater than 2% of a development extension of the tread band of the tyre;
the lateral blocks have an elongate portion and a head portion located at an end of the elongate portion; the elongate portion having a dimension (S1) in an axial direction and the head portion having a dimension (S2) in the axial direction, where S2>S1;
the elongate portion extends according to an extension direction forming an angle (α) a relative to the equatorial plane (X-X) comprised between 0° and 30°;
the elongate portion has an axially outer lateral wall facing one of the circumferential grooves and an axially inner lateral wall facing one of the first and second portions of the central blocks; and
the head portion has a first transverse wall forming with the axially inner lateral wall a concavity which points towards the equatorial plane (X-X) and wherein the first or the second portion of a central block subsequent in the axial direction faces the concavity and is at least partially surrounded by the axially inner lateral wall and by the first transverse wall;
the two shoulder annular portions each having a row of shoulder blocks comprising a plurality of shoulder blocks circumferentially separated by shoulder transverse grooves;
wherein in the tread band, a number of shoulder blocks is twice a number of lateral blocks.