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US 11,446,962 B2Granted
Tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorsShintaro Tomita, Koichi Nakajima
Life of this patent
Estimating the term…
Abstract
A tire comprises a tread portion provided with at least one main groove extending continuously in the tire circumferential direction to axially divide the tread portion into land portions. The land portion is provided with axial grooves extending thereacross in the tire axial direction, and each comprising a radially outer portion and a radially inner portion which is wider than the radially outer portion. The radially outer portion of each of the axial grooves is crossed by one ore more sipes.
Claims18
A tire comprising:
- a tread portion provided with at least one main groove extending continuously in the tire circumferential direction to axially divide the tread portion into land portions having axial widths, wherein
- the land portions includes a first land portion provided with axial grooves extending in a tire axial direction across the entire axial width of the first land portion so that both ends of each axial groove are opened on both sides in the tire axial direction of the first land portion, and
- each of the axial grooves comprises a radially outer portion and a radially inner portion which is wider than the radially outer portion,
- wherein at least the radially outer portion of each of the axial grooves is crossed by a sipe extending from one side to the other side of the axial groove,
- wherein the radially outer portion is defined as having a constant width along the radial direction thereof,
- the radially inner portion comprises a widening part extending radially inwardly from the radially outer portion while gradually increasing the groove width, and a constant-width part extending radially inwardly from the widening part while keeping the groove width constant defining a maximum groove width,
- wherein said sipe extends from a radially outer surface of the first land portion to the constant-width part of the radially inner portion and terminates without reaching a bottom of the axial groove,
- wherein said each of the axial grooves is curved in an arc shape in its top view, and crossed by said sipe at substantially a right angle, and
- said sipe has a length more than 1.0 times and not more than 1.5 times said maximum groove width of the constant-width part of the radially inner portion,
- wherein the land portions include
- a pair of axially outermost shoulder land portions, and said first land portion provided as a pair of middle land portions disposed between the shoulder land portions, and
- each of the middle land portions is provided with neither grooves nor sipes other than said each of the axial grooves and said sipes.
9 more elements
A tire comprising:
- a tread portion provided with at least one main groove extending continuously in the tire circumferential direction to axially divide the tread portion into land portions having axial widths,
- wherein
- the land portions include a first land portion provided with axial grooves extending in a tire axial direction and each comprising a radially outer portion and a radially inner portion which is wider than the radially outer portion,
- at least the radially outer portion of each of the axial grooves is crossed by a sipe extending from one side to the other side of the axial groove,
- the axial grooves extend across the entire axial width of the first land portion so that both ends of each axial groove are opened on both sides in the tire axial direction of the first land portion,
- said sipe and the axial grooves have different depths measured from a radially outer surface of the first land portion,
- wherein the radially inner portion is a constant-width part extending radially inwardly while keeping the groove width constant defining a maximum groove width,
- wherein said each of the axial grooves is curved in an arc shape in its top view and crossed by said sipe at substantially a right angle, and
- said sipe has a length more than 1.0 times and not more than 1.5 times said maximum groove width of the constant-width part of the radially inner portion,
- wherein the first land portion is provided with neither grooves nor sipes other than said each of the axial grooves and said sipes.
7 more elements
Dependencies are inferred from the claim text.