Amusement devices: games – Board games – pieces – or boards therefor – Rotatably mounted board
Patent
1990-03-15
1991-09-17
Marlo, George J.
Amusement devices: games
Board games, pieces, or boards therefor
Rotatably mounted board
273230, A63B 3706
Patent
active
050488384
ABSTRACT:
The inner layer of the core has a diameter of 15-25 mm, a weight of 2-14 grams, a specific gravity of 1.2-4, and a hardness of 55-80 JIS C. The outer layer has a specific gravity lower than that of the inner layer by 0.1-3.0. The cover has a radial thickness of 1.5-2.5 mm.
A three-piece solid golf ball comprising a two-piece solid core consisting of inner and outer layers and a cover enclosing the core is improved in durability and flying performance through a proper choice of physical parameters of the core inner and outer layers and the cover.
REFERENCES:
patent: 4625964 (1986-12-01), Yamada
patent: 4714253 (1987-12-01), Nakahara et al.
patent: 4848770 (1989-07-01), Shama
Chikaraishi Toshio
Ieiri Hidetoshi
Maehara Kazuto
Sugai Kazuhiko
Bridgestone Corporation
Marlo George J.
LandOfFree
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