Tension-based non-pneumatic tire
A non-pneumatic tire for supporting a load by working in tension. The tire can comprise a generally annular inner ring, a generally annular outer ring, and a web having a plurality of web elements. The tire can further comprise a layer or layers fabric material acting as a bonding agent to bond tire components together.
1. A non-pneumatic tire for supporting a load comprising:
a generally annular inner ring having an axis of rotation;
a deformable generally annular outer ring comprising a first flowable material and having a radially innermost surface and a radially outermost surface;
a flexible web extending between the inner and the outer ring, the web comprising tension members coupled to the radially innermost surface of the outer ring;
a cured tread carrying layer comprised of a second flowable material and having a radially innermost surface and a radially outermost surface, the radially innermost surface of the tread carrying layer extending continuously in a circumferential direction of the tire; and
a layer of fabric material having a radially innermost surface coupled to the radially outermost surface of the outer ring and a radially outermost surface coupled to the radially innermost surface of the cured tread carrying layer, wherein the layer of fabric material secures the first flowable material to the second flowable material of the cured tread carrying layer.
2. The non-pneumatic tire of claim 1 , wherein the layer of fabric material comprises a porous structure.
3. The non-pneumatic tire of claim 1 , wherein the layer of fabric material is one of a group consisting of polyolefin, nylon, polyester, cotton duck, and plainwoven or dull-finish linen.
4. The non-pneumatic tire of claim 1 , wherein the first flowable material is urethane.
5. The non-pneumatic tire of claim 1 , wherein the second flowable material is rubber.
6. The non-pneumatic tire according to claim 1 , wherein the layer of fabric material is comprised of a material other than the first and second flowable materials.
7. The non-pneumatic tire according to claim 1 , wherein a cross-section of the tread carrying layer taken along a plane extending radially from the tire's center has a rounded shape.
8. The non-pneumatic tire according to claim 1 , wherein a cross-section of the tread carrying layer taken along a plane extending radially from the tire's center has a crowned shape.
9. The non-pneumatic tire of claim 1 , wherein the web comprises an interconnected web comprising as least two radially adjacent layers of web elements at every radial cross-section of the tire, the web elements defining a plurality of generally polygonal openings.
10. The non-pneumatic tire of claim 9 , wherein the plurality of generally polygonal openings comprises a first plurality of generally polygonal openings having a first shape and a second plurality of generally polygonal openings having a second shape different from said first shape.
11. The non-pneumatic tire according to claim 10 , wherein at least one of the first plurality of generally polygonal openings and at least one of the second plurality of generally polygonal openings are traversed when moving in any radially outward direction from the axis of rotation.
12. The non-pneumatic tire according to claim 1 , wherein the web defines a plurality of openings circumferentially spaced around the tire and radially spaced at varying distances from the axis of rotation, so as to support a load by working in tension.
13. The non-pneumatic tire according to claim 1 , wherein the web comprises a plurality of web spokes extending between the inner and outer rings.
14. The non-pneumatic tire according to claim 1 , wherein the inner ring is adhesively engaged with the wheel.
15. The non-pneumatic tire according to claim 1 , wherein the inner ring is chemically bonded to the wheel.
16. The non-pneumatic tire according to claim 1 , wherein the radially innermost surface of the tread carrying layer extends continuously across a centerline of the tire in a direction of the axis of rotation.
17. The non-pneumatic tire according to claim 1 , wherein the radially outermost surface of the layer of fabric material is positioned lower than the radially innermost surface of the tread carrying layer.
18. The non-pneumatic tire according to claim 1 , wherein the radially outermost surface of the layer of fabric material is positioned radially inward from the radially innermost surface of the tread carrying layer.
19. The non-pneumatic tire according to claim 10 , wherein each of said first plurality of generally polygonal openings has a first inner boundary spaced at a first radial distance and each of said second plurality of generally polygonal openings has a second inner boundary spaced at a second, greater radial distance.
20. The non-pneumatic tire according to claim 19 , wherein at least one generally polygonal opening of said first plurality of generally polygonal openings is larger than at least one generally polygonal opening of said second plurality of generally polygonal openings.