Ball for a skating device

Abstract

A ball comprising a first material having an elastic modulus of at least E=0.60 GPa, preferably at least E=0.70 GPa and more preferably at least E=0.73 GPa and/or a maximum elastic modulus of E=5 GPa, preferably at most E=3 GPa, more preferably at most E=1 GPa and even more preferably at most E=0.74 GPa, the first material defining at least an outermost section of the ball.

We claim: 
     
         1 . A ball for a skating device, the ball comprising a first material having an elastic modulus in a range E=0.60 GPa to E=5 GPa, the first material defining at least an outermost section of the ball. 
     
     
         2 . The ball according to  claim 1 , wherein the first material has an elastic modulus of about E=0.73 GPa to about E=0.74 GPa. 
     
     
         3 . The ball for a skating device according to  claim 1 , further comprising a core having a second material being less elastic than the first material, circumferenced by at least one concentric outer layer comprising the elastic modulus of the first material. 
     
     
         4 . The ball for a skating device according to  claim 1 , wherein a Poisson's ratio of the ball and/or of an outer layer is in a range μ=0.30 to μ=0.50. 
     
     
         5 . The ball according to  claim 4 , wherein the Poisson's ratio of the ball and/or the outer layer is about μ=0.41. 
     
     
         6 . The ball for a skating device according to  claim 1 , wherein a diameter of the ball is in a range of 20 mm to 100 mm. 
     
     
         7 . The ball according to  claim 6 , wherein the diameter of the ball is in the range 58 mm and 80 mm. 
     
     
         8 . The ball for a skating device according to  claim 1 , wherein a hardness of the ball and/or an outer layer is in a range 40 D to 90 D. 
     
     
         9 . The ball according to  claim 8 , wherein the hardness is about 65 D. 
     
     
         10 . The ball for a skating device according to  claim 1 , further comprising a pattern on a surface of the ball, said pattern configured to adjust a coefficient of kinetic friction, durability, color, or to comprise one of a design or a text. 
     
     
         11 . A skating device comprising a three to eight balls according to  claim 1 . 
     
     
         12 . The skating device comprising a ball according to  claim 1 , further comprising one of a chassis or a support for fixing to a boot. 
     
     
         13 . A method for manufacturing a ball for a skating device particularly according to  claim 1 , providing a ball with a minimum elastic modulus in a range from E=0.60 GPa to E=5 GPa, the first material defining at least an outermost section of the ball. 
     
     
         14 . The method of  claim 1 , providing the ball with a minimum elastic modulus of about E=0.73 GPa to about E=0.74 GPa, the first material defining at least the outermost section of the ball. 
     
     
         15 . The method of  claim 13 , providing the ball with a minimum Poisson's ratio and/ or an outer layer to be in a range μ=0.30 to μ=0.50. 
     
     
         16 . The method of  claim 15 , wherein the ball and/or the outer layer has a minimum Poisson's ratio of about μ=0.41. 
     
     
         17 . The method of  claim 13 , the method comprising:
 providing a diameter of the ball in a range of 20 mm to 100 mm.   
     
     
         18 . The method of  claim 17 , wherein the diameter of the ball is in the range 58 mm to 80 mm. 
     
     
         19 . The method for manufacturing a skating device comprising at least one ball according to  claim 13 . 
     
     
         20 . The method for manufacturing the skating device comprising the ball according to  claim 13 , providing the skating device to further comprise a chassis and a support for fixing to a boot.