Adjustable finger grip hole for bowling balls

Details Adjustable finger grip hole for bowling balls Adjustable finger grip hole for bowling balls

1989-11-30

1990-11-06

Marlo, George J.

Amusement devices: games

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

Target

273 63B, A63B 3700

Patent

active

049680331

ABSTRACT:
An adjustable finger grip hole for a bowling ball is disclosed. The finger grip hole, designed for installation within the opening drilled into the ball, is a nested set of three cup-like receptacles. The middle receptacle of the set moves axially in the space between the others to adjust the size of the opening formed by the innermost receptacle. In an alternate embodiment, inner cups of varying size are substituted within an outer cup to effect the finger grip hole adjustment. The interiors of the inner cups can also be pitched at a predetermined angle with respect to the axis of the inner cup, and the rims of both inner and outer cups may be provided with notched markings to facilitate the reproducible angular positioning of the inner cup.

REFERENCES:
patent: 447011 (1891-02-01), Harman
patent: 673688 (1901-05-01), Pickett
patent: 2210528 (1940-08-01), Darby
patent: 2372958 (1945-04-01), Keith
patent: 2842367 (1958-07-01), Keith
patent: 2844375 (1958-07-01), Nestor
patent: 3861681 (1975-01-01), Kelsey
patent: 4561654 (1985-12-01), Haza
patent: 4778178 (1988-10-01), Haza

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