Games using tangible projectile – Golf – Ball
Patent
1998-06-05
1999-11-16
Marlo, George J.
Games using tangible projectile
Golf
Ball
473355, 473368, 473370, A63B 3708
Patent
active
059848057
ABSTRACT:
A golf ball includes a spherical outer-layer core having a concentric spherical inner cavity and having a wall thickness of 5-10 mm. A spherical inner-layer core having a diameter smaller than that of the spherical cavity is disposed within the spherical cavity of the outer-layer core. A cover is formed on the outer surface of the outer-layer core. A liquid is charged into the space between the outer-layer core and the inner-layer core to thereby form a liquid layer having a thickness of 1-3 mm. The liquid has a specific gravity substantially equal to that of the material of the inner-layer core. In the golf ball, the inner-layer core and outer-layer core can rotate independently while the golf ball is traveling. Also, the golf ball has sufficient resilience and strength.
REFERENCES:
patent: 5823889 (1998-10-01), Aoyama
patent: 5827133 (1998-10-01), Chang
Bridgestone Sports Co. Ltd.
Marlo George J.
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