Patent ID: 11964514
Assignee: THE YOKOHAMA RUBBER CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A pneumatic tire, comprising:
a tread pattern, the tread pattern comprising
three or more circumferential main grooves extending in a tire circumferential direction;
a plurality of land portions defined by one or two of the circumferential main grooves of the three or more circumferential main grooves;
the plurality of land portions includes a shoulder land portion on the outer side of one of the circumferential main grooves and a middle land portion on the inner side of the shoulder land portion;
a plurality of lug grooves provided in the middle land portion and the shoulder land portion; and
a plurality of sipes provided in the middle land portion and the shoulder land portion and provided between the lug grooves that are adjacent,
the lug grooves of the middle land portion extending continuously from an edge on an outer side of the middle land portion in a tire width direction to an edge on an inner side of the middle land portion in the tire width direction and passing through the middle land portion;
the sipes in the middle land portion extending continuously from the edge on the outer side of the middle land portion in the tire width direction to the edge on the inner side of the middle land portion in the tire width direction and passing through the middle land portion;
the sipes being composite sipes each having a two-dimensional portion and a three-dimensional portion;
the two-dimensional portion being provided at one open end of the sipes; and
the three-dimensional portion being provided at an other open end of the sipes;
wherein
among open ends on both sides of the lug grooves of the middle land portion, an open end on an identical side to the one open end of the sipe at which the two-dimensional portion is provided is further provided with a raised bottom portion;
the three-dimensional portion of the sipes is provided on the outer side of the sipes in the tire width direction in the middle land portion;
the two-dimensional portion of the sipes is provided on the inner side of the sipes in the tire width direction in the middle land portion;
the three-dimensional portion of the sipes is provided on the inner side of the sipes in the tire width direction in the shoulder land portion; and
all of the sipes in the middle land portion have a same arrangement of the two-dimensional portion and the three-dimensional portion in the tire width direction.