Ball with grooves

FIELD OF THE INVENTION. - On sport games.

STATE OF THE PRIOR ART. - At present, the coefficient of forward resistance in ball is attained by dimples distributed around them, which fail to reduce the effect of the wind , particularly side wind, on the ball. In this way the resistance is not reduced. (This is continuation in part of the Spanish patent P200101695)

DESCRIPTION OF THE INVENTION. The ball of the sphere type with peripheral channels spaced and intersected at distances on the surface, with part of the flow on the front over pressure area communicating with the rear depression of the ball in its forward movement, facilitating aerodynamic air circulation through it and so reducing resistance and allowing its rotation and lift, enhance the advance, that consists in a sphere whose surface is covered by multiple peripheral channels intersected which determine equal spherical triangles.

Some are equilateral spherical triangles circumscribed in a regular polyhedron (Figure 5) of 20 faces or in almost regular polyhedrons of 60, 80, 240, 320, 960 faces or projections.

In other each one of the previous triangles are divided into six spherical triangles generating other polyhedrons formed by 120, 360, 480, 1440, 1920, 5760, etc. faces or projections between which are generated the corresponding channels formed by maximum circles.

A variant is formed by triangles spherical rectangles and adds intermediate partial channels, the ends of these partial channels and the points of confluence or intersection of the channels can be of smaller depth or said depth can be smooth in their union with the surface of the sphere.

The peripheral orifices and channels can have their cross-section circular, semicircular, rectangular, triangular or trapezoidal, these two last shapes can have the greater or smaller opening towards the outside.

Through orifices may be added through the ball and parallel to tangents to it, crossed over and inter-communicated on different planes, and which form curved interior ducts facilitating the internal circulation of the air as the balls turns.

Operation: The front air flow communicates the frontal over-pressure section of the ball with the depression or rear along the peripheral channels with or without its rotation, leaving it through the rear half zone. On the rear face, it eliminates or reduces the high level of turbulence caused with flat or smooth spheres.

Advantages: The reduction of resistance or aerodynamic perforation is greater and occurs-at all Reynolds numbers or speeds of the ball, in those with dimples resistance is lessened for a single Reynolds number, reaching greater height during the rotation because of the channels and, as a result, greater range, permitting the use of greater weights and sizes.

This makes an enhanced stroke possible, with greater control of the ball, and the path of the ball is less affected by wind, particularly side wind, with is more stable during its advance

BRIEF DESCRIPTION OF the DRAWINGS

• Figure 1 shows a schematic view of the ball of the invention.
• Figure 2 shows a schematic view of a variant.
• Figure 3 shows a schematic view of an equilateral triangle.
• Figure 4 shows a schematic view of a equilateral triangle.
• Figure 5 shows a schematic view of a portion of surface of the ball of the invention.
• Figure 6 shows a schematic and cross-section view of a ball.

MORE DETAILED DESCRIPTION OF THE INVENTION

figure 1 shows a ball (1), the peripheral channels (2) and the points of crossing of the channels (11), formed by triangles spherical rectangles.

Figure 2 consists of the ball (1), the peripheral channels (2) the points of crossing of the channels (11), the partial and intermediate channels (12) and the ends of such (13).

Figure 3 shows the division of an equilateral triangle in other four equilateral triangles.

Figure 4 shows an equilateral triangle divided into six triangles equal rectangles.

Figure 5 consists of the peripheral channels (2 and 7) and the faces or projections (14, 15, 16 and 17) of the type of triangles spherical rectangles.

Figure 6 shows the cross-section of the ball (1), the crossed over and intercommunicated orifices (3, 4 and 5) on a plane, and which form curved interior ducts facilitating the internal circulation of the air as the ball turns. The arrow (10) shows the ball turn.