FR2654004A1 - GOLF BALL WITHOUT SEWING. - Google Patents

Abstract

A seamless golf ball is disclosed. In this golf ball (10), the spherical outer surface of which has a plurality of dimples, any large circle (30) drawn on said spherical outer surface intersects any one or more dimples and one of the large circles may correspond to the parting line of a mold used to make the golf ball, and the dimples are arranged in a repeating pattern determined by the projection of the sides (20) of a regular polyhedron onto the surface. Application in particular to golf balls exhibiting excellent overall symmetry and an increased number of networks of dimples at its surface.

Description

The present invention relates to a seamless golf ball, that is,

  say a golf ball with a

  plurality of dimples in its spherical outer surface

  and in which it is not possible to draw on the surface of the ball, a large circle intersecting

  not at least some of the dimples.

  Golf balls are generally manufactured by a molding process implemented in a two-part mold. Until then, all golf balls molded in this way had at least one large

  circle intersecting no dimple (the large circle cor-

  corresponding to the separation line of the mold) In turn

  this required manufacturers of golf balls to remove

  sea the symmetry of the network of dimples located on the golf ball to dispose the separation line free of

  This is why the number of satellite networks

  sums possible (for an acceptable golf ball in front of

to be manufactured), was limited.

  We have now found that it is possible to

  Breaking a golf table in which there is no large circle intersecting any dimple This improves the symmetry of the ball, increasing a number

  possible networks of dimples and to have

  optimal surface of the ball.

  This is why it is planned according to the

  present invention a golf ball having a plurality

  of dimples in its spherical outer surface,

  characterized in that any large circle traced on said spherical outer surface intersects any of the

dimples or several dimples.

  Preferably, at least one of said large circles substantially divides into two equal parts any dimple that it intersects, and in a preferred embodiment, such a large circle, which cuts the dimples substantially in two equal parts, corresponds to the separation line of the mold suitably, the dimples can be arranged in a repetitive pattern on the

  spherical surface of the ball and this network can be deter-

  appropriately mined by the projection of the sides of a polyhedron, on the spherical surface The polyhedron can be

  for example an icosi-dodecahedron, a dodecahedron, an icosa-

or a cube.

  The dimples may have a curved (eg circular) shape according to a plan view, or a non-shaped shape.

  curve (for example rectangular) according to a plan view.

  Other features and advantages of the pre-

  invention will appear on reading the description

  which will follow, taken in reference to the accompanying drawings, in which:

  Figures 1 to 7 show a schematic view of

  tick of a golf ball according to the invention in the

  which, all big circle intersects at least some of the dimples. In the drawings of the figures, in which like reference numerals designate identical elements, a golf ball 10 has a plurality of dimples, which are arranged in a repetitive pattern corresponding to the projection of the sides of a polyhedron onto the surface of the golf ball. the ball These sides are spotted by

dashed lines 20.

  A line of dashes 30 represents, on

  each of the figures, one of the many large circles pos-

  of the ball We see that each large circle intersects

  at least some of the dimples Additional information

  concerning the number and shape of the dimples and

  the type of polyhedron used to determine the repeated network

  dimples, are shown in the table below.

  after. N of the number of dimples figure

BOARD

  Shape of dimples Type of polyhedron curve curve curve curve curve no curve icosi-dodecahedron icosi-dodecahedron dodecahedron dodecahedron icosahedron cube dodecahedron.

Claims (8)

CLASS I CAT IONS   1 Golf ball having a plurality of golf courses   sette in its spherical outer surface, characterized in that any large circle (30) traced on said spherical outer surface intersects any of the dimples or several dimples.   Golf ball according to claim 1, characterized   characterized in that at least one of said large circles (30)   substantially divides into two equal parts any let it intersect.   Golf ball according to claim 2,   by a molding method, characterized in that one of said large circles (30), which cut the dimples substantially in two equal parts, corresponds to the separation line of the mold.   4 Golf ball according to any one of the   Claims 1 to 3, characterized in that the said   settes are arranged according to a repetitive network on the said spherical outer surface.   Golf ball according to claim 4, characterized   characterized in that said repetitive grating is determined by projecting the sides (20) of a polyhedron onto said spherical surface.   Golf ball according to claim 5, characterized   in that said polyhedron is a cube, a dodecahedron   dre, an icosahedron and an icosi-dodecahedron.   7 Golf ball according to any one of the   Claims 1 to 6, characterized in that the said   settes have a curved shape in a plan view.   8 Golf ball according to any one of the   Claims 1 to 6, characterized in that the said   settes are not curved according to a plan view.