Golf balls

• US 4,915,389 A
• Filed: 11/16/1988
• Issued: 04/10/1990
• Est. Priority Date: 11/16/1988
• Status: Expired due to Term

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Ihara, Keisuke
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US07/271,837
• Time in Patent Office: 510 Days
• Field of Search: 273/232, 273/213, 273/183 C, 40/327
• US Class Current: 473/383
• CPC Class Codes: A63B 37/0004 Surface depressions or protrusions
• CPC Class Codes: A63B 37/0006 Arrangement or layout of dimples
• CPC Class Codes: A63B 37/0009 Polygonal
• CPC Class Codes: A63B 37/0018 Specified number of dimples

Abstract

A golf ball has many dimples formed on its spherical surface, provided that these dimples are existent on all great circles depicted on the spherical surface, whereby the aerodynamic properties are improved and sufficiently uniformized over the full spherical surface. All of dimples are positioned on the great circles so that no land portion defining a circumferential parting line is present. The number of dimples is increased to 272 in one embodiment and 482 in another.

Claims

1. A golf ball having a plurality of dimples formed in its spherical surface, characterized in that all of said dimples are arranged in a dimple pattern on all great circles depicted on said spherical surface.

2. The golf ball according to claim 1, wherein said dimple pattern is arranged on said surface so that there is no ring-like island portion defining a parting line on said spherical surface.

3. The gold ball of claim 1 wherein said dimple pattern comprises 272 dimples.

4. The golf ball of claim 2 wherein said dimples are circular.

5. The golf ball of claim 1 wherein said dimple pattern comprises 372 circular dimples.

6. The golf ball of claim 1 wherein said dimple pattern comprises 402 dimples.

7. The golf ball of claim 1 wherein said dimple pattern comprises 480 dimples.

8. The golf ball of claim 1 wherein said dimple pattern comprises 482 dimples.