TREAD COMPRISING A BLOCK HAVING A PLURALITY OF SIPES

摘要

The aspects disclosed herein relate to a tread for a tire including at least one block of rubbery material of width W and length L with L>>W. This block extends in a circumferential direction (X) when the tread is mounted on the tire, the block including a contact surface intended to come into contact with the ground and a first lateral wall and a second lateral wall delimiting this contact surface. The block further includes a plurality of sipes opening onto the contact surface of the block, with each sipe extending over the contact surface in an oblique direction opening onto the first lateral wall and onto the second lateral wall, the sipes of the block being oriented in the same direction. The sipes are distributed over the contact surface of the block in such a way that when one sipe reaches the second lateral wall another sipe starts out from the first lateral wall at the same circumferential level (N) on the block, and each sipe includes at least two parts.

主权项

1. Tread for a tire, comprising:
at least one block of rubbery material of width W and length L with L>>W, the at least one block extending in a circumferential direction (X) when the tread is mounted on the tire, the at least one block comprising a contact surface that contacts with the ground and a first lateral wall and a second lateral wall delimiting the contact surface,
the at least one block further comprising a plurality of sipes opening onto the contact surface of the at least one block, each sipe extending over the contact surface in an oblique direction opening onto the first lateral wall and onto the second lateral wall, the sipes of the at least one block being oriented in the same direction, wherein the sipes are distributed over the contact surface of the at least one block in such a way that when one sipe reaches the second lateral wall, another sipe starts out from the first lateral wall at a same circumferential level on the at least one block (3), and in that each sipe comprises at least one first sipe part and a second sipe part, the first sipe part having, in a transverse direction, a length L1 making an angle α with this transverse direction and the second sipe part having a length L2 making an angle β, with L1>L2 and β>α.