Bowling ball
First Claim
1. A bowling ball comprising:
- (a) an inner core having its center substantially coincident with the geometrical center of said bowling ball;
(b) a solid outer core surrounding said inner core;
(c) and a rigid elastomer foam cover surrounding said outer core, and having a minimum Shore D Durometer hardness of 72 and a maximum specific gravity of 1.
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Accused Products
Abstract
A bowling ball having a substantially large portion of the ball'"'"'s weight concentrated toward the center of the ball, to form a bowling ball having a low moment of inertia. The ball comprises a solid inner core made from a mineral oxide such as lead oxide mixed with a binding resin such as polyester, an outer core surrounding the inner core and made from filled or unfilled elastomers such as polyurethane or polyester, and a low density syntactic foam cover encapsulating the outer core and made from polyurethane or other elastomers mixed with glass microballoons, and having a minimum Shore D hardness of 72 and a maximum specific gravity of 1. The inner core in conjunction with the outer core and cover has a calculated maximum moment of inertia of 0.184 in-ozs-sec2 per pound of ball weight, for providing a substantially high total kinetic energy output. An additional increase in total kinetic energy output is obtained by the use of a high density annular top weight mass located closely around the inner core such that its lower surface is located at the midplane of the ball.
35 Citations
14 Claims
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1. A bowling ball comprising:
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(a) an inner core having its center substantially coincident with the geometrical center of said bowling ball; (b) a solid outer core surrounding said inner core; (c) and a rigid elastomer foam cover surrounding said outer core, and having a minimum Shore D Durometer hardness of 72 and a maximum specific gravity of 1. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A bowling ball comprising:
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(a) an inner core having its center substantially coincident with the geometrical center of said bowling ball; (b) a solid outer core surrounding said inner core; (c) and a rigid elastomer foam cover surrounding said outer core, and having a minimum Shore D Durometer hardness of 72; (d) said inner core in conjunction with said outer core and said cover, provide a calculated maximum moment of inertia of 0.184 in-ozs-sec2 per pound of ball weight. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification