Patent ID: 6743122
Filing Date: 2004-06-01
Classification: A63B

Abstract:
A multi-piece solid golf ball comprising; a solid core, an enclosure layer around the core, said enclosure layer composed primarily of a thermoplastic resin, an intermediate layer of at least one layer around the enclosure layer, and a cover of at least one layer around the intermediate layer, said cover having a Shore D hardness in the range of 50 to 65, whereinsaid enclosure layer and said intermediate layer each have a Shore D hardness of 10 to 50, the Shore D hardness of said enclosure layer is not greater than the Shore D hardness of said intermediate layer which is not greater than the Shore D hardness of said cover, and provided that said solid core has a deflection A (mm) under an applied load of 100 kg, a first spherical body consisting of said solid core and said enclosure layer has a deflection B (mm) under an applied load of 100 kg, a second spherical body consisting of said solid core, said enclosure layer and said intermediate layer has a deflection C (mm) under and applied load of 100 kg, and the ball has a deflection D (mm) under an applied load of 100 kg, these deflection values satisfy the relationship that A is from 3.4 to 6.8 mm, B is from 2.3 to 7.0 mm, C is from 2.3 to 6.5 mm and D is from 2.3 to 6.0 mm and wherein: 0.85&lE;B/A&lE;1.15, 0.85&lE;C/B&lE;115 and 0.7&lE;D/C&lE;1.0.