Two-piece solid golf ball

Details Two-piece solid golf ball Two-piece solid golf ball

2005-01-04

2005-01-04

Caldarola, Glenn (Department: 3711)

Games using tangible projectile

Golf

Ball

C473S378000

Reexamination Certificate

active

06837804

ABSTRACT:
Disclosed is a two-piece solid golf ball satisfying the following conditions (1) to (4):(1) a cover predominantly contains a polyurethane material;(2) the cover has a JIS C hardness of 72 to 89, and a thickness of 0.70 to 1.95 mm;(3) a core is formed from a rubber material containing an organic sulfur compound; and(4) a center portion of the core has a JIS C hardness of 58 to 68, a surface portion of the core has a JIS C hardness of 71 to 87, and a value obtained through subtraction of the JIS C hardness of the center portion of the core from the JIS C hardness of the surface portion of the core is 8 to 21.The golf ball exhibits excellent feeling on impact, controllability, cut resistance, scratch resistance, and durability against cracking caused by repeated hitting, and has improved flight performance; i.e., an improved carrying distance particularly upon being hit upwind.

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patent: 5803834 (1998-09-01), Yamagishi et al.
patent: 6142888 (2000-11-01), Higuchi et al.
patent: 6-319830 (1994-11-01), None
patent: 9-215778 (1997-08-01), None
patent: 9-308708 (1997-12-01), None

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