| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf ball which has improved dimples and provides excellent flying performance. <P>SOLUTION: The golf ball has a multiplicity of dimples (A to D) on its surface. The surface are occupying ratio Y of the dimples is 0.8 to 0.9. The total volume V of the dimples is 300 mm<SP>3</SP>to 700 mm<SP>3</SP>. The average volume Va which is the value obtained by dividing the total volume V by the total number N of the dimples is≥1.30 mm<SP>3</SP>. The average curvature R which is the average value of the curvature (r) in the sectional shape of the dimples is≥16 mm. The average occupying ratio (y) which is the value obtained by dividing the surface occupying ratio Y by the total number N of the dimples is≥0.0022. The total amount X of the contour length (x) of the dimples and the surface area occupying tatio Y satisfy the relation expressed by the following mathematical expression (1). X≤3882×Y+1495...(1). <P>COPYRIGHT: (C)2003,JPO</p> |
