Multi-piece solid golf ball

Details Multi-piece solid golf ball Multi-piece solid golf ball

2006-12-13

2008-11-04

Trimiew, Raeann (Department: 3711)

Games using tangible projectile

Golf

Ball

Reexamination Certificate

active

07445567

ABSTRACT:
The invention provides a multi-piece solid golf ball having a core, an envelope layer which encases the core and is composed of an inside layer and an outside layer, an intermediate layer encasing the envelope layer, and a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples. The core is formed primarily of a rubber material, and the envelope layer, intermediate layer and cover are each formed primarily of the same or different resin materials. The envelope layer, intermediate layer and cover have thicknesses which satisfy the relationship: cover thickness<intermediate layer thickness<envelope layer total thickness. The envelope layer, intermediate layer and cover have material hardnesses (Durometer D hardness) which satisfy the relationship: hardness of envelope inside layer material<hardness of envelope outside layer material<hardness of intermediate layer material>hardness of cover material. The envelope outside layer material has a Durometer D hardness of at least 53. The golf ball of the invention has an excellent flight and controllability which are acceptable to professional and skilled amateur golfers, and also has an excellent durability to cracking on repeated impact and an excellent scuff resistance.

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