Golf ball

• US 7,175,546 B2
• Filed: 05/26/2004
• Issued: 02/13/2007
• Est. Priority Date: 07/14/2003
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: SRI Sports Limited (Sumitomo Rubber Industries Limited)
• Inventors: Asakura, Takeshi
• Primary Examiner(s): Gorden; Raeann
• Application Number:
  US10/853,274
• Publication Number:
  US 20050014579A1
• Time in Patent Office: 993 Days
• Field of Search: 473378-385
• US Class Current: 473/383
• CPC Class Codes: A63B 37/0004 Surface depressions or protrusions
• CPC Class Codes: A63B 37/0009 Polygonal
• CPC Class Codes: A63B 37/0012 Dimple profile, i.e. cross-sectional view
• CPC Class Codes: A63B 37/0017 Specified total dimple volume
• CPC Class Codes: A63B 37/0018 Specified number of dimples
• CPC Class Codes: A63B 37/0021 Occupation ratio, i.e. percentage surface occupied by dimples
• CPC Class Codes: A63B 37/0074 Two piece balls, i.e. cover and core

Abstract

Golf ball 1 has multisurface dimples 4a. The multisurface dimple 4a has a central concave face 7 and six inclined faces 8. The inclined face 8 extends obliquely upward from the edge 9 of the central concave face 7 up to the phantom sphere. Two multisurface dimples 4a are adjacent each other sharing a boundary line 10 on spherical surface interpositioned therebetween. Total length of the boundary lines 10 that exist at the site where multisurface dimples 4a are adjacent each other is equal to or less than 2400 mm. Proportion of the multisurface dimples 4a occupied in total number of dimples is preferably equal to or greater than 70%. Proportion of the number of the boundary lines 10 occupied in the number of sites where multisurface dimples 4a are adjacent each other is equal to or greater than 70%.

Claims

1. A golf ball having numerous dimples on the surface thereof, wherein

multisurface dimples composed of a central concave face and plural inclined faces extending obliquely upward from an edge of the central concave face are included in said dimples;

said golf ball comprises at least one boundary line that exists on a phantom spherical surface at a site where said multisurface dimples are adjacent each other;

a total length of the boundary lines is equal to or less than 2200 mm; and

a total volume of the dimples is 300 to 750 mm³.

2. The golf ball according to claim 1, wherein a proportion of a number of the multisurface dimples occupied in a total number of said dimples is equal to or greater than 70%.

3. The golf ball according to claim 1, wherein a proportion of a number of sites where the multisurface dimples are adjacent each other sharing a boundary line.

4. The golf ball according to claim 1, wherein the total length of the boundary lines is 1500 to 2200 mm.

5. The golf ball according to claim 1, wherein a total volume of the dimples is 400 to 700 mm³.

6. The golf ball according to claim 1, wherein a total volume of the dimples is 450 to 650 mm³.

7. The golf ball according to claim 1, wherein a total number of the dimples is 150 to 360.

8. The golf ball according to claim 1, wherein a total number of the dimples is 180 to 300.

9. The golf ball according to claim 1, wherein a total number of the dimples is 230 to 270.

10. A golf ball having numerous dimples on the surface thereof, wherein

multisurface dimples composed of a central concave face and plural inclined faces extending obliquely upward from an edge of the central concave face are included in said dimples;

said golf ball comprises at least one boundary line that exists on a phantom spherical surface at a site where said multisurface dimples are adjacent each other;

a total length of boundary lines is equal to or less than 2300 mm; and

a total volume of the dimples is 300 to 750 mm³.

11. The golf ball according to claim 10, wherein the total length of the boundary lines is 1500 to 2300 mm.

12. The golf ball according to claim 10, wherein a proportion of a number of the multisurface dimples occupied in a total number of said dimples is equal to or greater than 70%.

13. The golf ball according to claim 10, wherein a proportion of a number of sites where the multisurface dimples are adjacent each other sharing a boundary line interpositioned therebetween which exists on a phantom spherical surface, occupied in a number of sites where said multisurface dimples are adjacent each other, is equal to or greater than 70%.

14. The golf ball according to claim 10, wherein a total volume of the dimples is 400 to 700 mm³.

15. The golf ball according to claim 10, wherein a total volume of the dimples is 450 to 650 mm³.

16. The golf ball according to claim 10, wherein a total number of the dimples is 150 to 360.

17. The golf ball according to claim 10, wherein a total number of the dimples is 180 to 300.

18. The golf ball according to claim 10, wherein a total number of the dimples is 230 to 270.