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US 10,369,847 B2Granted
Heavy duty tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorQingmao Li
Life of this patent
Estimating the term…
Abstract
A heavy duty tire comprises a tread portion provided with annular land zones divided by circumferentially extending main grooves. At least one of the land zones is provided with first recesses disposed at one edge of the first land zone, second recesses disposed at the other edge of the first land zone, sipes extending from the first recesses to the second recesses, and shallow grooves extending from non-recessed portions of one edge of the first land zone to non-recessed portions of the other edge. The depth of the shallow grooves is less than the depth of the sipes.
Claims10
A heavy duty tire comprising:
- a tread portion provided with a plurality of main grooves extending continuously in the tire circumferential direction and a plurality of annular land zones defined by the main grooves, wherein
- the land zones include at least one first land zone which is defined as being provided with
- first recesses disposed at one of the edges of the first land zone,
- second recesses disposed at the other edge of the first land zone,
- sipes extending from the first recesses to the second recesses, and
- shallow grooves extending from non-recessed portions of one edge of the first land zone to non-recessed portions of the other edge,
- the sipes have a depth and the shallow grooves have a depth less than the depth of the sipes,
- each of the sipes is made up of a pair of parallel straight end portions and a straight middle portion therebetween so as to have a zigzag shape,
- each of the shallow grooves is made up of a pair of parallel straight end portions and a straight middle portion therebetween so as to have a zigzag shape,
- in each first land zone, the middle portion of each of the shallow grooves intersects with the middle portion of one of the sipes,
- the land zones include a crown land zone on the tire equator, a pair of axially outermost shoulder land zones, and a pair of middle land zones between the crown land zone and the shoulder land zones,
- the crown land zone and the middle land zones are each formed as the first land zone, and
- the parallel straight end portions of the sipes and the parallel straight end portions of the shallow grooves in the crown land zone and the middle land zones are inclined to one direction with respect to the tire axial direction.
10 more elements
A heavy duty tire comprising:
- a tread portion provided with a plurality of main grooves extending continuously in the tire circumferential direction and a plurality of annular land zones defined by the main grooves, wherein
- the land zones include at least one first land zone which is defined as being provided with
- first recesses disposed at one of the edges of the first land zone,
- second recesses disposed at the other edge of the first land zone,
- sipes extending from the first recesses to the second recesses, and
- shallow grooves extending from non-recessed portions of one edge of the first land zone to non-recessed portions of the other edge, and
- the sipes have a depth and the shallow grooves have a depth less than the depth of the sipes,
- the land zones include a crown land zone on the tire equator, a pair of axially outermost shoulder land zones, and a pair of middle land zones between the crown land zone and the shoulder land zones,
- the crown land zone and the middle land zones are each formed as the first land zone, and
- the shoulder land zones are each formed as a second land zone provided with neither sipes nor grooves.
7 more elements
A heavy duty tire comprising:
- a tread portion provided with a plurality of main grooves extending continuously in the tire circumferential direction and a plurality of annular land zones defined by the main grooves, wherein
- the land zones include at least one first land zone which is defined as being provided with
- first recesses disposed at one of the edges of the first land zone,
- second recesses disposed at the other edge of the first land zone,
- sipes extending from the first recesses to the second recesses, and
- shallow grooves extending from non-recessed portions of one edge of the first land zone to non-recessed portions of the other edge,
- the sipes have a depth and the shallow grooves have a depth less than the depth of the sipes,
- each of the sipes is made up of a pair of parallel straight end portions and a straight middle portion therebetween so as to have a zigzag shape,
- each of the shallow grooves is made up of a pair of parallel straight end portions and a straight middle portion therebetween so as to have a zigzag shape,
- in each first land zone, the middle portion of each of the shallow grooves intersects with the middle portion of one of the sipes,
- in each first land zone, the parallel straight end portions of the sipes and the parallel straight end portions of the shallow grooves are inclined in one direction,
- the land zones include a crown land zone on the tire equator, a pair of axially outermost shoulder land zones, and a pair of middle land zones between the crown land zone and the shoulder land zones, and
- the crown land zone and the middle land zones are each formed as the first land zone.
10 more elements
Dependencies are inferred from the claim text.