Multi-piece golf ball and method for manufacturing the same
AssigneeSumitomo Rubber Industries, Ltd.
InventorsSeiichiro Endo, Keiji Ohama
Life of this patent
Estimating the term…
Abstract
A multi-piece golf ball with improved carry without sacrificing properties like spin performance, durability, coefficient of restitution, and the feel when the ball is hit, the golf ball including a core, an intermediate layer surrounding the core, and the cover surrounding the intermediate layer, where a plurality of voids are distributed in at least one of the core, the intermediate layer or the cover along the spherical surface of the core or intermediate layer, or the cover. 20-600 voids are formed on at least one of the interfaces between the core and the intermediate layer, between a plurality of intermediate layers, or between the intermediate layer and the cover.
Claims13
A multi-piece golf ball comprising:
- a core;
- an intermediate layer surrounding said core;
- and a cover surrounding said intermediate layer, wherein 20 to 600 voids are distributed in at least one of said core, said intermediate layer or said cover along a spherical surface thereof, wherein each void has a volume of 0.75 to 6 mm3.
A multi-piece golf ball comprising:
- a core;
- an intermediate layer surrounding said core;
- and a cover surrounding said intermediate layer, wherein 20 to 600 voids are distributed in at least one of said intermediate layer or said cover along a spherical surface of said intermediate layer or said cover, wherein each void has a volume of 0.75 to 6 mm3.
A method for manufacturing the multi-piece golf ball comprising:
- a core;
- an intermediate layer surrounding said core;
- and a cover surrounding said intermediate layer, wherein 20 to 600 voids are distributed in at least one of said core, said intermediate layer or said cover along a spherical surface thereof, wherein each void has a volume of 0.75 to 6 mm3, wherein the method comprises the steps of:
- molding a half shell of the intermediate layer with gaps formed on its inner surface by using a mold with projections on its spherical surface;
- and molding an assembly of the core and the intermediate layer by covering the core with a pair of the half shells.
A method for manufacturing the multi-piece golf ball comprising:
- a core;
- an intermediate layer surrounding said core;
- and a cover surrounding said intermediate layer, wherein 20 to 600 voids are distributed in at least one of said intermediate layer or said cover along a spherical surface of said intermediate layer or said cover, wherein each void has a volume of 0.75 to 6 mm3, wherein the method comprises the steps of:
- molding a half shell of the intermediate layer with gaps formed on its inner surface by using a mold with projections on its spherical surface;
- and molding an assembly of the core and the intermediate layer by covering the core with a pair of the half shells.
Dependencies are inferred from the claim text.