Non-pneumatic tire

Patent metadata

Field	Value
Publication number	US-2025042205-A1
Application number	US-202318362277-A
Country	US
Kind code	A1
Filing date	Jul 31, 2023
Priority date	Jul 31, 2023
Publication date	Feb 6, 2025
Grant date	—

Abstract

The invention is directed to a non-pneumatic tire comprising a tread band, sidewalls having each a carcass ply, wherein each of the carcass plies extends only on one lateral side of the tire. Radially outer end portions of the carcass plies are attached to the tread band in parallel to the tread band and point essentially in opposite axially outer directions. The invention is also directed to a non-pneumatic tire comprising a tread band and first and second carcass plies, wherein each of these carcass plies is provided on only one lateral side of the tire and has two radially inner bead portions, a radially outer top portion attached to the tread band and two intermediate portions extending transversely to the tread band from the top portion to the respective bead portion. Furthermore, the present invention is directed to tire rim assemblies comprising such tires.

First claim

What is claimed is:

1 . A non-pneumatic tire comprising a circumferential tread band, a first sidewall, and a second sidewall,
wherein the first sidewall comprises a first carcass ply and the second sidewall comprises a second carcass ply, wherein the first carcass ply extends only on a first lateral side of the tire and the second carcass ply extends only on a second lateral side of the tire, opposite to the first lateral side,
wherein each of the first and the second carcass plies has a circumferential and radially outer end portion attached to the tread band, a circumferential and radially inner bead portion, and a circumferential intermediate portion extending between the outer end portion and the respective inner bead portion transversely to the radially inner surface of the tread band,
wherein the radially outer end portion of the first carcass ply is attached to the tread band in parallel to the tread band and points in a first, essentially axially outer direction, and wherein the radially outer end portion of the second carcass ply is attached to the tread band in parallel to the tread band and points in a second, essentially axially outer direction opposite to the first axially outer direction.

2 . The non-pneumatic tire according to claim 1 , wherein each of the first and second carcass plies has a circumferential curved portion between its end portion parallel to the tread band and its intermediate portion extending transversely to the radially inner surface of the tread band.

3 . The non-pneumatic tire according to claim 2 , wherein a circumferential rubber bead is attached on at least one lateral side of the curved portion, to reinforce the curved portion between the respective radially outer end portion and the respective intermediate portion.

4 . The non-pneumatic tire according to claim 3 , wherein a first circumferential rubber bead is attached to a laterally outer side of the curved portion to connect at least a part of the radially outer end portion with a radially upper part of the intermediate portion, and wherein a second circumferential rubber bead is attached to a laterally inner side of the curved portion to connect the curved portion with the tread band radially above the curved portion.

5 . The non-pneumatic tire according to claim 1 , wherein at least one of the radially outer end portions extends axially along the tread band over an axial width within a range of 5% to 20% of the total axial width of the tread band.

6 . The non-pneumatic tire according to claim 1 , wherein the tread band comprises a circumferentially extending tread and a circumferentially extending shearband arranged in parallel to and radially below the tread, and wherein the carcass plies are attached to a radially inner surface of the shearband.

7 . The non-pneumatic tire according to claim 1 , wherein the tire comprises in each bead portion a circumferential bead and a circumferential bead apex, wherein the bead comprises one or more steel wires, and wherein the bead apex consists of a rubber composition.

8 . The non-pneumatic tire according to claim 1 , wherein each carcass ply comprises a rubber composition reinforced by a plurality of cords.

9 . The tire according to claim 1 , further comprising a third sidewall and a fourth sidewall, both arranged axially between the first sidewall and the second sidewall, wherein the third sidewall comprises a third carcass ply and the fourth sidewall comprises a fourth carcass ply, wherein the third carcass ply extends only on the first lateral side of the tire and the fourth carcass ply extends only on the second lateral side of the tire,
wherein each of the third and the fourth carcass plies has a circumferential and radially outer end portion attached to the tread band, a circumferential and radially inner bead portion, and a circumferential intermediate portion extending between the outer end portion and the respective inner bead portion transversely to the radially inner surface of the tread band, wherein the radially outer end portion of the third carcass ply is attached to the tread band in parallel to the tread band and points in the first, essentially axially outer direction, and wherein the radially outer end portion of the fourth carcass ply is attached to the tread band in parallel to the tread band and points in the second, essentially axially outer direction.

10 . The tire according to claim 9 , wherein at least one bead portion of the third and fourth carcass plies extends further in an inner radial direction than the bead portions of the first and the second carcass plies.

11 . A tire rim assembly comprising the tire according to claim 1 and a rim, wherein the rim has
a first circumferential flange portion radially supporting and forcing the bead portion of the first carcass ply in a first axial direction, and
a second circumferential flange portion radially supporting and forcing the bead portion of the second carcass ply in an axial direction opposite to the first axial direction.

12 . The tire rim assembly according to claim 11 , wherein at least a part of one of the bead portions is axially clamped between one of the flange portions and a further flange portion of the rim, which is axially opposite to said one of the flange portions at the clamped bead portion.

13 . The tire rim assembly according to claim 11 , wherein an axial distance between axially innermost surfaces of the first bead portion and the second bead portion is at least 30% smaller than a maximum axial width of the tread band, when the tire is mounted to the rim.

14 . The tire rim assembly according to claim 13 , wherein said axial distance is from 35% to 70% smaller than the maximum axial width of the tread band, when the tire is mounted to the rim.

15 . The tire rim assembly according to claim 11 , wherein the rim comprises a first circumferential member comprising the first circumferential flange portion and a second circumferential member comprising the second circumferential flange portion, and wherein the first circumferential member is axially mountable to the second circumferential member to force both bead portions axially towards each other.

16 . A non-pneumatic tire comprising a circumferential tread band, a first carcass ply and a second carcass ply, wherein the first carcass ply is only provided on a first lateral side of the tire and the second carcass ply is only provided on a second lateral side of the tire, wherein each carcass ply has two radially inner bead portions, a radially outer top portion attached to the tread band and two intermediate portions, and wherein each intermediate portion extends transversely to the tread band from the respective top portion to the respective bead portion.

17 . The tire according to claim 16 , wherein each top portion extends axially along the tread band over 20% to 40% of the maximum axial width of the tread band.

18 . The tire according to claim 16 , wherein the axially inner intermediate portion of each carcass ply is radially longer than the axially outer intermediate portion of the same carcass ply.

19 . The tire according to claim 16 , wherein each carcass ply has two curved portions, wherein each curved portion is arranged between the top portion of the carcass ply and one of the intermediate portions of the carcass ply, and wherein each curved portion is attached to a radially inner surface of the tread band by a rubber bead.

20 . The tire according to claim 16 , wherein the tread band comprises a tr

Assignees

• Goodyear Tire & Rubber

Inventors

• Downing Daniel Ray
• Yensho Nathan Edward

Classifications

• B60C7/24

  characterised by means for securing tyres on rim or wheel body · CPC title

• B60C15/0009 Primary

  features of the carcass terminal portion · CPC title

• B60C15/0628 Primary

  comprising a bead reinforcing layer · CPC title