Play ball

Details Play ball Play ball

1980-07-09

1981-12-15

Marlo, George J.

Amusement devices: games

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

Target

273 58E, A63B 3902, A63B 3906

Patent

active

043055834

ABSTRACT:
The invention relates to playballs, e.g. tennis balls, having a core pressurized with a low permeability gas, e.g. sulphur hexafluoride. Use of such gases can cause the ball to emit a pinging noise on bouncing. The invention provides a core (1) pressurized with gas of low permeability, the internal wall surface (3) of core (1) being profiled by a multiplicity of depressions or protuberances (4), the outer wall surface (2) of the core being smooth. The profiling is preferably in the form of dimples or pimples of circular plan view.

REFERENCES:
patent: 2131756 (1938-10-01), Roberts
patent: 2210954 (1940-08-01), Roberts

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