Patent ID: 11951773
Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 10:
11. A tread fora tire of a heavy-duty vehicle, comprising: a tread surface when new that is intended to come into contact with a road surface when the tire provided with this tread is being driven on, this tread comprising:
edges axially delimiting a tread width;
a plurality of open wells on the tread surface when new near to each of the edges, these open wells of depth Pmax being arranged circumferentially;
each open well being delimited by two main faces connected by a well bottom, this bottom defining the depth Pmax of the well,
each open well having a maximum length of opening Lc measured in the circumferential direction on the tread surface and a transverse width La measuring the distance between the main faces, this width La being less than the circumferential maximum length of opening Lc, and
each open well is connected to a first axially extending hidden cavity formed within the tread, the first hidden cavity opening into a main face of said well at a first circumferential end of the open well, and
each open well is connected to a second axially extending hidden cavity formed within the tread, the second hidden cavity opening into a main face of said well at a second circumferential end of the open well opposite the first end, and
the first axially extending hidden cavity and the second axially extending hidden cavity extend toward their axially nearest edge and is axially terminated within the tread.