Large-sized two piece solid golf ball

• US 4,968,038 A
• Filed: 01/03/1989
• Issued: 11/06/1990
• Est. Priority Date: 09/13/1982
• Status: Expired due to Term

• Current Assignee: SRI Sports Limited (Sumitomo Rubber Industries Limited)
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: Yamada, Mikio
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US07/293,590
• Time in Patent Office: 672 Days
• Field of Search: 273/232, 273/62, 273/220, 273/235 R, 273/DIG. 022, 273/230, 273/218
• US Class Current: 473/372
• CPC Class Codes: A63B 37/0003 Golf balls
• CPC Class Codes: A63B 37/0004 Surface depressions or protrusions
• CPC Class Codes: A63B 37/0017 Specified total dimple volume
• CPC Class Codes: A63B 37/0031 Hardness
• CPC Class Codes: A63B 37/0033 Thickness
• CPC Class Codes: A63B 37/0074 Two piece balls, i.e. cover and core
• CPC Class Codes: A63B 37/008 Diameter
• CPC Class Codes: A63B 37/0084 Initial velocity
• CPC Class Codes: Y10S 273/22 Ionomer

Abstract

A large-sized (1.68 inches) two piece solid golf ball superior in flight distance, comprising a solid core and a cover having a thickness of 2.10 to 2.30 mm. and a Shore D hardness of not less than 65, the total volume of dimples being from 330 to 365 mm³.

Claims

1. A two piece solid golf ball comprising a solid core and a cover for covering the solid core, said cover having a thickness of 2.10 to 2.30 mm, a Shore D hardness of not less than 65, and the outer periphery of said ball having a plurality of dimples formed therein, each of said dimples having the form of a circle in cross section, and the dimples having a diameter and a depth to provide a total dimple volume in the range of 330 to 365 mm³.

3. The golf ball of claim 1, wherein said cover comprises an ionomer resin.

4. The golf ball of claim 1, wherein said solid core is made of a rubber composition comprising cis-1,4-butadiene rubber.

5. The golf ball of claim 1, wherein said cover has a thickness of 2.10 to 2.20 mm.

6. The golf ball of claim 1, wherein the total volume of the dimples is from 345 to 350 mm³.

2. A two piece solid golf ball comprising a solid core enclosed in a cover, said cover having an average thickness of 2.10 to 2.30 mm, a Shore D hardness of not less than 65, and a plurality of dimples in the outer periphery of the ball, said dimples having a cross section in the form of a circle, and a total dimple volume of 330 to 365 mm³.