Patent ID: 6402630
Filing Date: 2002-06-11
Classification: A63B

Abstract:
A bowling ball comprising:a spherical outer portion having a hollow interior; a frame mounted within the hollow interior and defining an elongated weight chamber; an elongated weight shaft mounted for rotation within the chamber; a weight carried by the weight shaft within the chamber; first means on the weight and on the frame cooperative to constrain the frame and weight against relative rotation upon rotation of the weight shaft, the weight being freely longitudinally movable upon the frame upon clockwise and counterclockwise rotation of the weight shaft, with the direction of longitudinal movement corresponding to whether the weight shaft is rotated clockwise or counterclockwise; second means on the weight shaft and on the weight cooperative to urge the weight along the weight shaft in opposite directions, according to clockwise or counterclockwise rotation of the weight shaft; and drive means selectively operable for rotating the weight shaft clockwise or counter clockwise.