Golf balls

Details Golf balls Golf balls

1997-04-24

1998-11-17

Marlo, George J.

Games using tangible projectile

Golf

Ball

473377, A63B 3712, A63B 3706

Patent

active

058368345

ABSTRACT:
A two or three piece golf ball in which a boundary surface between concentric solid layers has a projection formed on the surface of a concentric solid layer having a high hardness such that the projection extends along an approximate normal direction, a depression corresponding to the projection is formed in the surface of a concentric solid layer having a low hardness, and the concentric solid layer having a high hardness and the concentric solid layer having a low hardness are joined together such that the projection is inserted into the depression. A golf ball comprising a two-layer solid core is composed of a low-hardness inner core and a high-hardness outer core joined around the low-hardness inner core. A projection is formed on the inner surface of the high-hardness outer core such that the projection extends along an approximate normal direction, while a depression corresponding to the projection is formed in the outer surface of the low-hardness inner core, and the low-hardness inner core and the high-hardness outer core are joined together such that the projection is inserted into the depression.

REFERENCES:
patent: 700658 (1902-05-01), Kempshall
patent: 704748 (1902-07-01), Kempshall
patent: 712413 (1902-10-01), Richards
patent: 720852 (1903-02-01), Smith
patent: 5439227 (1995-08-01), Egashira et al.
patent: 5490674 (1996-02-01), Hamada et al.
patent: 5692973 (1997-12-01), Dalton

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