JPH01268578A - Golf ball - Google Patents

Abstract

PURPOSE: To provide a golf ball of making possible to show a wave type shape in its outer surface when viewing from any circumferential direction by composing of that a discontinuous portion elongated mutually toward a outer radial direction or a inner radial direction upon the outer surface is formed. CONSTITUTION: A regular pattern 11 consisting of a pimple 20 and a dimple 21 of being mutually protruded or become hollow is formed on a golf ball 10. The outer surface of ball is formed to show almost an sine curve when viewing from any direction. An appropriate distance X between mutually adjacent pimples 20 is between 2mm and 5mm. The height Y of each the pimple 20 is equal to the depth of dimple 21 accompanied with the pimple 20, its value can be in range between 0.1mm and 0.4mm. Like this, this golf ball 10 has equal numbers of the pimple 20 and the dimple 21 which are mutually extended toward opposite direction along the radial line of ball upon its outer surface so that shows an aerodynamic characteristics to be satisfied with or having a reproducibility.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a golf ball having an improved shape;
More particularly, the present invention relates to a golf ball having a surface with discontinuities extending radially outwardly and inwardly.

radially outwardly extending surface discontinuities (pimples)
The golf ball itself has a generic name of "plump pattern" (br*tupble-p10).
er++). Such balls have previously been formed by randomly physically attaching bingles to the smooth outer surface of the ball. Such balls are generally not accepted by players because the pimples flatten and sometimes peel from the ball due to repeated hitting with a club. Also, golf balls having the above-mentioned "bran blue pattern" did not exhibit satisfactory or reproducible aerodynamic properties.

The present inventors provide a golf ball having a surface that has a regular pattern of discontinuities that extend alternately outwardly or inwardly on the surface, and that exhibits a wavy shape when viewed from any direction. I found out that it is possible.

Therefore, the present invention provides a golf ball having discontinuous portions extending alternately radially outward or radially inward on its outer surface, so that the outer surface exhibits a wave-like shape when viewed from any circumferential direction. I will provide a.

Preferably, the outer surface of the ball has a substantially sign car shape when viewed in the circumferential direction.

In a particularly preferred embodiment, 1. The radii of curvature of the radially outwardly extending discontinuities and the radially inwardly extending discontinuities are approximately equal.

Thus, the golf ball of the present invention will have an equal number of "pimples" and "dimples" on its surface extending in opposite directions along the radial line of the ball.

Embodiments of the present invention will be described below with reference to the drawings.

The golf ball 10 is formed with a regular pattern 11 consisting of pimples 20 and dimples 21 that alternately protrude or recess.

The outer surface of the ball has a substantially sinusoidal shape when viewed from any direction.

A suitable distance (X) between adjacent pimples 20 is between 2 mm and 5 mm. The height (Y) of each pimple 20 is equal to the depth of the dimple 21 associated therewith, and its value is 0.
．． It can range between 1 mm and 0.4 mm.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional perspective view of the golf ball of the present invention, and FIG. 2 is an enlarged sectional view of the portion shown in FIG. 1. (Explanation of main symbols) 10: Golf ball, 11: Pattern on the ball surface, 20: Pimple, which is a discontinuous part extending outward in the radial direction, 21: Dimple, which is a discontinuous part, which extends inward in the radial direction.

Claims (1)

[Claims] 1. Discontinuous portions (20) that protrude outward in the radial direction and discontinuous portions (21) that extend inward in the radial direction that appear alternately on the outer surface.
A golf ball characterized in that the outer surface of the ball (10) is configured to have a wave-like shape (11) when viewed in any circumferential direction. 2. A golf ball according to claim 1, characterized in that the outer surface of the ball (10) has a substantially sinusoidal shape (11) when viewed in any circumferential direction. 3. The radius of curvature of the discontinuous portion (20) extending radially outward is approximately equal to the radius of curvature of the discontinuous portion (21) extending radially inward. Golf ball as described. 4. According to claim 1, 2 or 3, characterized in that the distance (X) between each adjacent radially outwardly projecting discontinuity (20) is in the range between 2 mm and 5 mm. Golf ball as described. 5. Any one of claims 1 to 4, characterized in that the depth (Y) of each of the discontinuities (21) extending radially inward is in the range between 0.1 mm and 0.4 mm. Golf ball as described.