Bowling ball

Details Bowling ball Bowling ball

1980-02-25

1982-03-23

Marlo, George J.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

273 63C, A63B 3710

Patent

active

043208991

ABSTRACT:
A bowling ball construction in which in the preferred embodiment a pair of weight blocks are provided internally in the ball to compensate for weight removed from the ball in drilling finger and thumb holes. The weight blocks are positioned so as to be intersected by the finger and thumb holes when drilled. As a result, there is no concentrated residual weight in the ball after drilling. The size of the weight blocks and the density thereof are selected so that after drilling, any axis of the ball may be spin axis with moments of inertia about principal axes being approximately equal and products of inertia about axes perpendicular to the spin axis being vanishingly small. Thus, the ball exhibits stability without wobble as it slides and rolls down a lane.

REFERENCES:
patent: 189674 (1877-04-01), Woods
patent: 3865369 (1975-02-01), Randolph
patent: 4121828 (1978-10-01), Amburgey
patent: 4131277 (1978-12-01), Randolph
patent: 4264071 (1981-04-01), Randolph

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