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Golf ball

a golf ball and dimple technology, applied in the field of golf balls, can solve the problems of large area, disturbance of air flow, and impair the dimple effect, and achieve the effects of suppressing uneven location of dimples, superior dimple effect, and excellent flight performan

Inactive Publication Date: 2010-07-29
DUNLOP SPORTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]In the golf ball, because the number of the units of the pole vicinity region is different from the number of the units of the equator vicinity region, a

Problems solved by technology

This difference disturbs air flow.
Due to this uneven location, a l

Method used

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Abstract

A golf ball 14 has a northern hemisphere N above an equatorial line Eq and a southern hemisphere S below the equatorial line Eq. Each of the northern hemisphere N and the southern hemisphere S has a pole vicinity region 30, an equator vicinity region 32, and a mid region 34. Each of the pole vicinity region 30, the equator vicinity region 32, and the mid region 34 has numerous dimples 20. The dimple pattern of the pole vicinity region 30 includes four units that are rotationally symmetrical to each other about a pole P. The dimple pattern of the equator vicinity region 32 includes six units that are rotationally symmetrical to each other about the pole P. The dimples 20 included in the mid region 34 are arranged along a mid latitude line 28. The number of the dimples 20 included in the mid region 34 is 24.

Description

[0001]This application claims priority on Patent Application No. 2009-15149 filed in JAPAN on Jan. 27, 2009. The entire contents of this Japanese Patent Application are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to golf balls. Specifically, the present invention relates to improvement of dimples of golf balls.[0004]2. Description of the Related Art[0005]Golf balls have a large number of dimples on the surface thereof. The dimples disturb the air flow around the golf ball during flight to cause turbulent flow separation. By causing the turbulent flow separation, separation points of the air from the golf ball shift backwards leading to a reduction of drag. The turbulent flow separation promotes the displacement between the separation point on the upper side and the separation point on the lower side of the golf ball, which results from the backspin, thereby enhancing the lift force that acts upon the ...

Claims

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Application Information

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IPC IPC(8): A63B37/14A63B37/00
CPCA63B37/0004A63B37/0083A63B37/0012A63B37/0017A63B37/0018A63B37/0019A63B37/002A63B37/14A63B37/0021A63B37/0022A63B37/0033A63B37/0036A63B37/0064A63B37/008A63B37/0006A63B37/00065A63B37/00221
Inventor SAJIMA, TAKAHIRO
Owner DUNLOP SPORTS CO LTD
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