| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve a flying performance by disturbing the flow of air by edges formed inside dimples. <P>SOLUTION: A golf ball has the dimples 8, and the dimple 8 is provided with a first curved surface S1, a second curved surface S2, a third curved surface S3, a first edge E1, a second edge E2 and a third edge E3. The second edge E2 and the third edge E3 are arranged concentrically to the first edge E1. The first curved surface S1 is in a ring shape, and the first curved surface S1 is inclined downwards from the first edge E1 toward the center of the dimple 8. The second curved surface S2 is in the ring shape, and the second curved surface S2 is inclined upwards from the second edge E2 toward the center of the dimple 8. The third curved surface S3 is in a bowl shape, and the third curved surface S3 is inclined downwards from the third edge E3 toward the center of the dimple 8. The air toward the center of the dimple 8 collides with the third edge E3. By the collision, the flow of the air is disturbed. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
