JPH04221578A - Golf ball - Google Patents

Abstract

PURPOSE: To provide the efficiency in which the application range of the surface of a golf ball is increased and improve aerodynamic property of the ball by a non-circular equal diameter dent (compared with a general circular dent). CONSTITUTION: A dent has the form of a normal equal diameter pattern having an odd number of edges and a circular apex. The number of edges of the equal diameter pattern conveniently ranges from 3 (equal triangle) to 13 (thirty-angle form).

Description

[Detailed description of the invention]

0001

FIELD OF THE INVENTION This invention relates to golf balls having equal diameter depressions.

0002

BACKGROUND OF THE INVENTION It has been known for many years to provide golf balls with multiple dimples to optimize the aerodynamic properties of the ball. Such depressions are generally circular in plan, although other shapes have been used including triangular, rectangular, pentagonal, and hexagonal.

Although the rules set forth by the main text governing the game require that the golf ball should behave relatively evenly from an aerodynamic point of view, the golfer's desire is to increase the resistance on the ball during flight. The emphasis is on increased distance achieved by reducing force. The pattern of the golf ball's dimples is of paramount importance in meeting these requirements both in terms of dimple shape and dimple pattern placement.

0004

The use of circular indentations imposes undesirable constraints on surface coverage and the optimum relationship between adjacent indentations to reduce to a minimum the drag forces acting on the ball. , but a constant diameter is also a desirable feature to create uniformity in aerodynamic behavior.

[0005]

SUMMARY OF THE INVENTION It has been found that depressions that are non-circular but have equal diameters in plan can not only provide greater efficiency of surface coverage but also obtain improved aerodynamic properties. did. Accordingly, the present invention provides a golf ball having a plurality of depressions in the spherical surface of the golf ball, each depression having the shape of a regular isodiametric figure having an odd number of sides and an arcuate apex when viewed from above. do.

Isodiametric figures can have up to 13 sides and can be, for example, equilateral triangles, regular pentagons, regular heptagons or regular nonagons, or regular polygons with 11 or 13 sides. .

Preferably, the indentations are arranged in an even repeating pattern on the spherical surface of the ball.

The pattern can conveniently be defined by projecting the edges of a regular polyhedron onto the spherical surface of the ball.

Examples of regular polyhedra according to the invention include the cube, octahedron, dodecahedron, icosahedron and 32-hedron.

The invention is illustrated by way of example only in the following description and with reference to the accompanying drawings, in which:

[0011]

[Embodiment] In FIG. 1, a golf ball 10 has a number of depressions 1.
1 is provided. Each depression has the shape of an equilateral triangle with an arcuate apex. The dimple pattern consists of dashed lines 12 to 2 representing the projection of the sides of the dodecahedron onto the spherical surface of the ball.
Indicated by up to 3.

In FIG. 2, a golf ball 30 is provided with a number of depressions 31. As shown in FIG. Each indentation has the shape of a regular pentagon with arcuate vertices, and the indentation pattern is defined by dashed lines 32 to 41 representing the projection of the sides of the icosahedron onto the spherical surface of the ball.
It is shown by up to.

In FIG. 3, a golf ball 50 is provided with a number of depressions 51. As shown in FIG. Each indentation has the shape of a regular pentagon with arcuate vertices, and the indentation pattern is formed by dashed lines 52 to 61 representing the projection of the edges of the dodecahedron onto the spherical surface of the ball.
It is shown by up to.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a golf ball having triangular equidiametric depressions, with the depressions arranged in a dodecahedral pattern.

FIG. 2 is a golf ball having pentagonal dimples of equal diameter, with the dimples arranged in an icosahedral pattern.

FIG. 3 is a golf ball having pentagonal dimples of equal diameter, with the dimples arranged in a regular dodecahedral pattern.

[Explanation of symbols]

10, 30, 50 Golf ball 11, 31
, 51 hollow

Claims (5)

[Claims] 1. A golf ball having a spherical surface with a large number of depressions, each depression (11, 31, 51) having a regular isodiametric shape having an odd number of sides and an arcuate apex when viewed from above. A golf ball characterized by having a shape. 2. The golf ball according to claim 1, wherein the shape of equal diameter is a regular triangle (11) or a regular pentagon (31, 51). [Claim 3] The figure of equal diameter is a regular heptagon, a regular nonagon,
The golf ball according to claim 1, wherein the golf ball is a regular polygon having 11 sides or a regular polygon having 13 sides. 4. The depressions are arranged in a uniform repeating pattern on the surface of the ball, and the pattern is defined by projecting the edges of a regular polyhedron onto the surface of the ball (10, 30, 50). Claim 1 characterized in that
, 2 or 3. 5. The golf ball according to claim 4, wherein the regular polyhedron is a cube, a regular octahedron, a regular dodecahedron, a regular icosahedron, or a regular 32-hedron.