Wheel for sports equipment
A wheel for a skateboard, roller skate or the like has a radial surface arranged to provide contact with the ground, said radial surface comprising areas of at least a first material and areas of a second material, said second material having at least one mechanical property differing from that of the first material. The first and second materials are arranged in such a way that they form a pattern on the radial surface which varies around the circumference of the wheel. This enables the adaptation of the behavior of the wheel in a very flexible way.
1. A wheel having a radial surface arranged to provide contact with the ground, said radial surface comprising areas of at least a first material and areas of at least a second material, said second material having at least one mechanical property differing from that of the first material, wherein the first and second materials are arranged in such a way that they form a pattern on the radial surface which varies around the circumference of the wheel, wherein said wheel has beveled side portions, and wherein the first and second materials are arranged in such a way that they form a pattern on at least one of the beveled side portions which varies around the circumference of the side portion.
2. A wheel according to claim 1 , wherein the at least one mechanical property includes at least one of hardness, coefficient of friction, rolling resistance and rebound.
3. A wheel according to claim 1 , having at least one outer portion extending around at least one edge of the radial surface of the wheels, and a central portion comprising the radial surface with a varying pattern, the central surface constituting the principal weight supporting surface arranged to interact with the riding surface.
4. A wheel according to claim 1 , wherein the first and second areas are arranged in such a way that the first areas surround islands of the second material, forming a pattern on the radial surface.
5. A wheel according to claim 1 , wherein each of the first and second materials forms continuous bands around the radial surface, the widths of said bands varying around the circumference.
6. A wheel according to claim 1 , wherein the first material forms a center band along the center of the wheel and the second material forms a side band on each side of the center band extending substantially to the edges of the wheel, wherein lines of the first material extend from the center band to the edges of the wheel, interrupting the side bands.
7. A wheel according to claim 1 , wherein one of the first and the second material extends from the outer surface of the wheel to the hub and the other material is substantially limited to the outer surface of the wheel.
8. A wheel according to claim 1 , wherein one of the first and the second material extends within the wheel from the outer surface of the wheel to the hub and the other material extends at least halfway from the outer surface toward the hub.
9. A wheel according to claim 1 , wherein the second material is arranged in a band around the hub and the first material is arranged around the band, the second material extending radially to the circumference of the wheel, the second material forming arms extending from the band to the circumference to form a pattern of the first and second materials around the circumference.
10. A wheel according to claim 1 , said wheel being adapted for use on a skateboard, an inline skate, a snakeboard or a rollerskate.
11. A wheel according to claim 1 , wherein the first material is a first polyurethane material and the second material is a second polyurethane material.
12. A wheel according to claim 11 , wherein the first and second areas are arranged in such a way that the first areas surround islands of the second polyurethane material, forming a pattern on the radial surface.
13. A wheel according to claim 11 , wherein each of the first and second polyurethane materials forms continuous bands around the radial surface, the widths of said bands varying around the circumference.
14. A wheel according to claim 11 , wherein the first polyurethane material forms a center band along the center of the wheel and the second polyurethane material forms a side band on each side of the center band extending substantially to the edges of the wheel, wherein lines of the first polyurethane material extend from the center band to the edges of the wheel, interrupting the side bands.
15. A wheel according to claim 11 , wherein one of the first and the second polyurethane material extends from the outer surface of the wheel to the hub and the other polyurethane material is substantially limited to the outer surface of the wheel.
16. A wheel according to claim 11 , wherein one of the first and the second polyurethane material extends within the wheel from the outer surface of the wheel to the hub and the other polyurethane material extends at least halfway from the outer surface toward the hub.
17. A wheel according to claim 11 , wherein the second polyurethane material is arranged in a band around the hub and the first polyurethane material is arranged around the band, the second polyurethane material extending radially to the circumference of the wheel, the second polyurethane material forming arms extending from the band to the circumference to form a pattern of the first and second polyurethane materials around the circumference.