Spinning ball

摘要

A simple and economical spin fixture which is specially designed to be integrally molded, implanted or otherwise embedded within a solid composition ball, for example, a polymerized thermoplastic foam basketball. The fixture rotatably seats one's fingertip inside the ball to allow effortless fingertip spinning. The gripping action is secure, and yet the frictional contact surface between the rotating and stationary parts is minimized to improve the spin quality.