Method of locating gripping holes in bowling ball

Details Method of locating gripping holes in bowling ball Method of locating gripping holes in bowling ball

1991-03-21

1992-09-22

Marlo, George J.

Amusement devices: games

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

Target

29899, A63B 3706

Patent

active

051490897

ABSTRACT:
A bowling ball having a mass of preselected density and a spherical surface equidistant from the center of the mass. The improvement being a weight block of a greater density than the preselected density in which the weight block has a first elongate section having a pair of opposite ends with an intermediate portion therebetween adjacent the surface of the ball and another elongate section having an axis of symmetry extending generally transverse of the first elongate section and extending from the intermediate portion and located between the center of the spherical mass and the first elongate section. Further, this invention includes a method for marking the center of the spherical mass and center axis of symmetry of the weight block on the surface of the ball and the plane of symmetry of the elongate weight block on the surface of the ball. Finally, the invention includes a method of determining the location of the plane of symmetry of the weight block and drilling the thumb and finger holes into the ball around the center axis of the weight block and having a preselected angular relationship to the plane of symmetry of the weight block to achieve a desired breaking point for the ball.

REFERENCES:
patent: 4121828 (1978-10-01), Amburgey
patent: 4913429 (1990-04-01), Fabanich

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