| 摘要 |
<p>A golf ball provided with two to four kind of dimples having different diameter from each other equally spaced over the entire surface of the golf ball, such that the flow of the air at every cross section crossing at right angles to the rotational axis of the golf ball is made equal, and at the same time, the angular difference between separation points is minimized.</p><p>According to the invention the surface (8) of the golf ball is divided into five-cornered divisions (10) and three-cornered divisions (11) by imaginary circular arcs which are reflections of the edges of a icosa-dodeca hedron. All of said divisions are uniformly provided with the said two to four kinds of dimples (1, 2, 3, 4) therein. The ratio of the diameter of the largest dimples (1) to that of the smallest dimples (4) is set to be between 1.25 and 1.50. </p> |
