Patent ID: 8858366
Filing Date: 2014-10-14
Classification: A63B,Y10T

Abstract:
1. A ball, comprising: a first layer, the first layer having a first flexural modulus; a second layer, the second layer disposed radially outward of the first layer; a third layer, the third layer disposed radially outward of the second layer, wherein the third layer has a second flexural modulus; a fourth layer, the fourth layer disposed radially outward of the third layer, wherein the fourth layer has a third flexural modulus; wherein the second flexural modulus is greater than the first flexural modulus and the first flexural modulus is greater than the third flexural modulus; and wherein the first layer has a first coefficient of restitution, the ball has a second coefficient of restitution, and the first coefficient of restitution is greater than the second coefficient of restitution; wherein the first flexural modulus is between about 5000 PSI and about 40000 PSI, the second flexural modulus is between about 20000 PSI and about 100000 PSI, and the third flexural modulus is between about 1000 PSI and about 10000 PSI.