Golf ball with dimple pattern arranged in spherical polygons having sides with different lengths

Abstract

Provided is a spherical polyhedron division structure of a golf ball where dimples are arranged to have a well-defined symmetry and a dimple pattern. In the spherical polyhedron division structure, wherein an arbitrary point on a surface of a spherical body constituting a golf ball is defined as a pole, a great circle dividing the spherical body into a northern hemisphere and a southern hemisphere with respect to the pole as a reference point is defined as an equator, the surface of the spherical body is divided into six areas formed by segments connecting the pole and points obtained by dividing the equator in units of 60°, each area is divided into spherical polygons formed by four spherical rectangles and two spherical triangles having sides with different lengths, and the spherical polygons arranged in different adjacent areas are symmetric with each other.

Claims

1. A golf ball comprising: a dimple pattern of dimples on the golf ball that are arranged according to spherical polygons having sides with different lengths and land area formed in between the dimples, wherein an arbitrary point on a land area of a spherical body constituting the golf ball is defined as a northern pole Pa, a southern pole Pa defined on a land area directly opposite the northern pole Pa, the dimple pattern comprising three dimples directly adjacent to the northern pole Pa land area, wherein a great circle dividing the spherical body into a northern hemisphere and a southern hemisphere with respect to the northern and southern poles Pa as equidistant reference points is defined as an equator E, wherein the northern hemisphere of the spherical body is divided into six adjacent areas formed by segments connecting points E1, E3, E5, E7, E9, and E11 obtained by dividing the equator E in units of 60° and passing through the northern pole Pa, wherein each of the six areas is divided into spherical polygons formed by four spherical polygons each having four different-length sides and two spherical triangles having different side lengths, wherein when points E1 to Pa to E7, E3 to Pa to E9, and E5 to Pa to E11 are connected to form three segments, each of the three segments successively alternates along the entirety of the segments between dividing in half dimples arranged along the segments, including one pole dimple, and positioning, without dividing, pairs of dimples directly adjacent to the sides of the segments, including the other two pole dimples wherein the southern hemisphere has the same spherical polyhedron division structure and dimple pattern as the northern hemisphere, and wherein the dimples arranged in each of the six areas are mirror symmetric with the dimples arranged in another adjacent area.

2. The golf ball according to claim 1, wherein the surface of the spherical body is divided by a great circle 1 passing through a point D2 (latitude 0° and longitude 79.10660535048°), a point D7 (latitude 54.73561032° and longitude 30°), a point D11 (latitude 60.5037915071° and longitude 330°), and a point D14 (latitude 43.08872314087° and longitude 289.1066054°); the surface of the spherical body is divided by a great circle 3 passing through a point D6 (latitude 19.47122064064° and longitude 30°), a point D5 (latitude 43.08872314087° and longitude 49.10660535049°), a point D26 (latitude 54.73561032° and longitude 150°), and a point D23 (latitude 31.48215411264° and longitude 180°); the surface of the spherical body is divided by a great circle 5 passing through the point D6 (latitude 19.47122064064° and longitude 30°), a point D8 (latitude 43.08872314087° and longitude 10.8933946°), the point D11 (latitude 60.5037915071° and longitude 330°), and a point D18 (latitude 43.08872314087° and longitude 250.8933946°); the surface of the spherical body is divided by a great circle 2 passing through the point D6 (latitude 19.47122064064° and longitude 30°), the point D3 (latitude 31.48215411264° and longitude 60°), the point D1 (latitude 35.26438968982° and longitude 90°), and the point D27 (latitude 19.47122064064° and longitude 150°); the surface of the spherical body is divided by a great circle 6 passing through the point D6 (latitude 19.47122064064° and longitude 30°), the point D9 (latitude 31.48215411264° and longitude 0°), the point D12 (latitude 35.26438968982° and longitude 330°), and the point D17 (latitude 19.47122064064° and longitude 270°); the surface of the spherical body is divided by a great circle 7 passing through the point D10 (latitude 0° and longitude 340.8933946°), the point D7 (latitude 54.73561032° and longitude 30°), the point D31 (latitude 60.5037915071° and longitude 90°), and the point D27 (latitude 19.47122064064° and longitude 150°); the surface of the spherical body is divided by a great circle 9 passing through the point D13 (latitude 0° and longitude 319.1066054°), the point D16 (latitude 54.73561032° and longitude 270°), the point D21 (latitude 60.5037915071° and longitude 210°), and the point D27 (latitude 19.47122064064° and longitude 150°); the surface of the spherical body is divided by a great circle 11 passing through the point D17 (latitude 19.47122064064° and longitude 270°), the point D2 (latitude 60.5037915071° and longitude 210°), the point D26 (latitude 54.73561032° and longitude 150°), and the point D30 (latitude 0° and longitude 100.8933946°); the surface of the spherical body is divided by a great circle 12 passing through the point D17 (latitude 19.47122064064° and longitude 270°), the point D20 (latitude 35.26438968982° and longitude 210°), the point D23 (latitude 31.48215411264° and longitude 180°), and the point D27 (latitude 19.47122064064° and longitude 150°); the equator is divided by 12 points E1 to E12 in units of longitude 30°; the equator is defined by a great circle 16 passing through the point E1 (latitude 0° and longitude 90°), the point E4 (latitude 0° and longitude 0°), the point E7 (latitude 0° and longitude 270°), and the point E10 (latitude 0° and longitude 180°); the surface of the spherical body is divided by a segment 10 connecting the point E1 (latitude 0° and longitude 90°), the pole Pa (latitude 90° and longitude 90°), and the point E7 (latitude 0° and longitude 270°); the surface of the spherical body is divided by a segment 15 connecting the point E2 (latitude 0° and longitude 60°), the pole Pa, and the point E8 (latitude 0° and longitude 240°); the surface of the spherical body is divided by a segment 4 connecting the point E3 (latitude 0° and longitude 30°), the pole Pa, and the point E9 (latitude 0° and longitude 210°); the surface of the spherical body is divided by a segment 13 connecting the point E4 (latitude 0° and longitude 0°), the pole Pa, and the point E10 (latitude 0° and longitude 180°); the surface of the spherical body is divided by a segment 8 connecting the point E5 (latitude 0° and longitude 330°), the pole Pa, and the point E11 (latitude 0° and longitude 150°); the surface of the spherical body is divided by a segment 14 connecting the point E6 (latitude 0° and longitude 300°), the pole Pa, and the point E12 (latitude 0° and longitude 120°), so that the surface of the spherical body is divided by spherical polygons including a plurality of spherical triangles and a plurality of spherical rectangles having sides with different lengths.

3. The golf ball according to claim 2, wherein with respect to the segment connecting the point D3 and the point D34, the segment connecting the point D9 and the point D32, and the segment connecting the point D23 and the point D33, the dimples are divided in half along each of the segments.

4. The golf ball according to claim 2, wherein the dimples having a diameter of 0.145 inch or more occupy 80% or more of the entire dimples.

5. The golf ball according to claim 2, wherein a total number of the dimples is in a range of 300 to 400.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a diagram illustrating a golf ball according to the present invention where a surface of a spherical body constituting the golf ball is divided into spherical polygons having sides with different lengths and intersection the points between division lines passing through the pole in an interval of longitude 30° and the equator and the equator are expressed by latitudes La and longitudes Lo.

(2) FIG. 2 is a diagram illustrating a golf ball according to the present invention where a surface of a spherical body constituting the golf ball is divided into spherical polygons having sides with different lengths and the points through which division lines pass are expressed by latitudes La and longitudes Lo.

(3) FIG. 3 is a diagram illustrating a golf ball according to the present invention where a surface of a spherical body constituting the golf ball is divided into spherical polygons having sides with different lengths and the spherical polygons divided by the division lines on the surface of the spherical body are indicated by solid lines.

(4) FIG. 4 is a diagram illustrating a golf ball according to the present invention where a surface of a spherical body constituting the golf ball is divided into spherical polygons having sides with different lengths and a dimple pattern is formed so that dimples are arranged to have a complete symmetry on the entire spherical body.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) Unlike the related art where a surface of a spherical body constituting a golf ball is divided into spherical polygons such as spherical equilateral polygons and dimples are arranged, in the present invention, the surface of the spherical body is divided into spherical polygons having sides with different lengths rather than spherical equilateral polygons and dimples are arranged in the spherical polygons to have a complete symmetry.

(6) Hereinafter, a golf ball with a dimple pattern arranged in spherical polygons having sides with different lengths according to the present invention will be described in detail with reference to the attached drawings.

(7) FIG. 1 is a diagram illustrating a golf ball according to the present invention where a surface of a spherical body constituting a golf ball into spherical polygons having sides with different lengths. In FIG. 1, an arbitrary one the point of the surface of the spherical body is defined as a pole Pa of the spherical body. As the pole Pa is used as a reference point, the spherical body is divided into a northern hemisphere and a southern hemisphere by a great circle which is an equator E. Intersection the points between the division lines passing through the pole Pa and the equator E in an interval of longitude 30° and the equator E are expressed by latitudes La and longitudes Lo.

(8) As illustrated in FIG. 1, division lines are seven great circles. The seven great circles includes one great circle 16 as the equator E and six great circles 4, 8, 10, 13, 14, and 15, each of which connects the pole Pa and the opposite points among 12 points E1 to E12 as intersection points of the equator E arranged in units of longitude 30°.

(9) More specifically, the great circle 16 as the equator E is a line connecting the point E1 (latitude 0° and longitude 90°), the point E4 (latitude 0° and longitude) 0°, the point E7 (latitude 0° and longitude 270°), and the point E10 (latitude 0° and longitude 180°) in FIG. 1.

(10) The great circle 10 is a line passing through the point E1 (latitude 0° and longitude 90°), the pole Pa (latitude 90° and longitude 90°), and the point E7 (latitude 0° and longitude 270°).

(11) The great circle 15 is a line passing through the point E2 (latitude 0° and longitude 60°), the pole Pa, and the point E8 (latitude 0° and longitude 240).

(12) The great circle 4 is a line passing through the point E3 (latitude 0° and longitude 30°), the pole Pa, and the point E9 (latitude 0° and longitude 210°).

(13) The great circle 13 is a line passing through the point E4 (latitude 0° and longitude 0°), the pole Pa, and the point E10 (latitude 0° and longitude 180°).

(14) The great circle 8 is a line passing through the point E5 (latitude 0° and longitude 330°), the pole Pa, and the point E11 (latitude 0° and longitude 150°).

(15) The great circle 14 is a line passing through the point E6 (latitude 0° and longitude 300°), the pole Pa, and the point E12 (latitude 0° and longitude 120°).

(16) Herein, along the bold great circles 4, 8, and 12 connecting the pole Pa and the respective points E3 (latitude 0° and longitude 30°), E5 (latitude 0° and longitude 330°), and E7 (latitude 0° and longitude 270°), the dimples are alternately arranged from the equator E to the pole Pa. This will be described later in detail.

(17) FIG. 2 is a diagram illustrating latitude La and longitudes Lo of points through which division lines other than the division lines illustrated in FIG. 1 pass in the division of the surface of the spherical body constituting the golf ball into spherical polygons having sides with different lengths according to the present invention.

(18) As illustrated in FIG. 2, the division lines are segments formed by 9 great circles 1, 2, 3, 5, 6, 7, 9, 11, and 12 passing through 34 points D1 to D34 on the surface of the spherical body.

(19) The great circle 1 is a line passing through the point D2 (latitude 0° and longitude 79.10660535048°), the point D7 (latitude 54.73561032° and longitude 30°), the point D11 (latitude 60.5037915071° and longitude 330°), and the point D14 (latitude 43.08872314087° and longitude) 289.1066054° in FIG. 2.

(20) The great circle 3 is a line passing through the point D6 (latitude 19.47122064064° and longitude 30°), the point D5 (latitude 43.08872314087° and longitude) 49.10660535049°, the point D26 (latitude 54.73561032° and longitude 150°), and the point D23 (latitude 31.48215411264° and longitude 180°) in FIG. 2.

(21) The great circle 5 is a line passing through the point D6 (latitude 19.47122064064° and longitude 30°), the point D8 (latitude 43.08872314087° and longitude) 10.8933946°, the point D11 (latitude 60.5037915071° and longitude 330°), and the point D18 (latitude 43.08872314087° and longitude 250.8933946°) in FIG. 2.

(22) The great circle 2 is a line passing through the point D6 (latitude 19.47122064064° and longitude 30°), the point D3 (latitude 31.48215411264° and longitude 60°), the point D1 (latitude 35.26438968982° and longitude 90°), and the point D27 (latitude 19.47122064064° and longitude 150°) in FIG. 2.

(23) The great circle 6 is a line passing through the point D6 (latitude 19.47122064064° and longitude 30°), the point D9 (latitude 31.48215411264° and longitude 0°), the point D12 (latitude 35.26438968982° and longitude 330°), and the point D17 (latitude 19.47122064064° and longitude) 270° in FIG. 2.

(24) The great circle 7 is a line passing through the point D10 (latitude 0° and longitude 340.8933946°), the point D7 (latitude 54.73561032° and longitude 30°), the point D31 (latitude 60.5037915071° and longitude 90°), and the point D27 (latitude 19.47122064064° and longitude 150°) in FIG. 2.

(25) The great circle 9 is a line passing through the point D13 (latitude 0° and longitude 319.1066054°), the point D16 (latitude 54.73561032° and longitude 270°), the point D21 (latitude 60.5037915071° and longitude 210°), and the point D27 (latitude 19.47122064064° and longitude 150°) in FIG. 2.

(26) The great circle 11 is a line passing through the point D17 (latitude 19.47122064064° and longitude 270°), the point D21 (latitude 60.5037915071° and longitude 210°), the point D26 (latitude 54.73561032° and longitude 150°), and the point D30 (latitude 0° and longitude 100.8933946°) in FIG. 2.

(27) The great circle 12 is passing through the point D17 (latitude 19.47122064064° and longitude 270°), the point D20 (latitude 35.26438968982° and longitude 210°), the point D23 (latitude 31.48215411264° and longitude 180°), and the point D27 (latitude 19.47122064064° and longitude) 150° in FIG. 2.

(28) In the spherical polyhedron division structure of the spherical body constituting the golf ball according to the present invention, spherical polygons are formed by connecting segments formed by connecting the great circle 16 as the equator E, the six great circles 4, 8, 10, 13, 14, and 15, and the nine great circles 1, 2, 3, 5, 6, 7, 9, 11, and 12 illustrated in FIG. 2; and the surface of the spherical body is divided by six areas formed by the segments connecting the pole Pa and the points E1, E3, E5, E7, E9, and E11 obtained by dividing the equator E in units of 60°, so that the surface of the spherical body is divided into the spherical polygons having sides with different lengths, wherein the spherical polygons in one area are arranged to be completely symmetric with those in another adjacent area. Herein, the great circles constituting spherical polygons are virtual lines for arrangement of dimples, so that the great circles are not actually expressed on the surface of the golf ball.

(29) The spherical polyhedron division structure of the spherical polyhedron is illustrated in FIG. 3.

(30) As illustrated in FIG. 3, it can be seen understood that in the six areas A, B, C, D, E, and F formed by the segments connecting the pole Pa and the points E1, E3, E5, E7, E9, and E11 obtained by dividing the equator E in units of 60°, four spherical rectangles and two spherical triangles having sides with different lengths in one area are arranged to be completely symmetric with those of another adjacent area.

(31) For example, four spherical rectangles A-4 and two spherical triangles A-3 having sides with different lengths are arranged in the area A formed by segments connecting the pole Pa and the point E1 and the point E3 among the points dividing the equator E in units of 60°; four spherical rectangles B-4 and two spherical triangles B-3 having sides with different lengths are arranged to be completely symmetric with those of the area A in the adjacent area B; and four spherical rectangles F-4 and two spherical triangles F-3 having sides with different lengths are arranged to be completely symmetric with those of the area A in another adjacent area F.

(32) In this case, in three areas A-B, C-D, and E-F or F-A, B-C, and D-E formed by the segments connecting the pole Pa and the points E3, E7, and E11 or the points E5, E9, and E1 obtained by dividing the equator E in units of 120° in the six areas A, B, C, D, E, and F, the spherical polygons in one area are also arranged to be completely symmetric with those of another adjacent area.

(33) Furthermore, in two areas A-B-C and E-D-F or the like formed by the segments connecting the pole Pa and the points E1 and E7, the points E3 and E9, or the points E5 and E11 obtained by dividing the equator E in units of 180° in the six areas A, B, C, D, E, and F, the spherical polygons in one area are also arranged to be completely symmetric with those of another adjacent area.

(34) In the golf ball according to the present invention, the surface of the spherical polyhedron is divided into spherical triangles having sides with different lengths and having different angles or is divided into spherical rectangles having side with different lengths and having different angles. In this manner, the spherical polyhedron as the golf ball according to the present invention is greatly different from a generally-used spherical polyhedron formed by spherical equilateral polygons. Therefore, unlike the related art, even in the case where large-sized dimples having a diameter of 0.145 inch or more are arranged, non-dimple portions can be minimized, so that the area ratio of dimples can be maximized.

(35) Furthermore, with respect to the six areas formed by segments connecting the pole Pa of the spherical body and the points obtained by dividing the equator in units of longitude 60°, the spherical polygons having sides with different lengths in different adjacent areas are arranged to be completely symmetric with each other, so that it is possible to easily implement dimple arrangement with a complete symmetry over the entire spherical body.

(36) Hereinafter, a dimple pattern arranged to be symmetrically over the entire spherical body having the spherical polyhedron division structure illustrated in FIG. 3 will be described with reference to FIG. 4.

(37) Referring to FIG. 4, first, dimples are arranged along the great circle 16 from the point E1 as a start the point of the great circle 16, that is, the equator E. If a row of the dimples arranged along the equator E (great circle 16) is referred to as a first row, the dimples of the second row are located at the positions between the dimples of the first row.

(38) When the dimples are arranged in the spherical polygons in this manner, some small-sized lands where no dimple exists may be formed between the spherical polygons. However, the size of the land is much smaller than that of the lands existing in the arrangement of dimples in spherical equilateral polygons of a spherical polyhedron of the related art.

(39) More specifically, first, dimples are arranged from the positions close to the equator E within the area formed by the bold segments connecting the points E1, D2, D5, and D31. In this case, the size of the dimples arranged along the solid segment connecting the points D3 and D34 in the great circle 2 is determined so that each of the dimples is divided in half by the bold segment (in actual case, since the segments are divided in half with respect to a portion of the great circle 10 expressed by the bold solid line connecting the points E1 and D31, the dimples are arranged only in the half of the segment connecting the point D3 and D34)

(40) Next, dimples are arranged from the positions close to the equator E within the area formed by the solid segments connecting the points D2, E3, and D7. In this case, similarly to the above-described case, the dimples of the second row are located at the positions between the dimples of the first row. Next, the dimples are arranged with an appropriate size along the solid segment connecting the points D5, the point D7, the pole Pa, and the point D31.

(41) Due to the above-described arrangement of the dimples, the dimples are arranged on ½ of the entire surface area of the golf ball ( 1/16 of the surface of the northern hemisphere of the golf ball) as the arrangement of the dimples in the bold segment connecting the points E1, the point E3, and the pole Pa.

(42) If the dimples are arranged in the adjacent areas in this manner, the dimples can be arranged in the segment connecting the point E1, the point E11, and the pole Pa to have a complete symmetry by the bold segment connecting the point E1 and the pole Pa. In addition, similarly, the dimples can be arranged in the segment connecting the point E3, the point E5, and the pole Pa to have a complete symmetry by the bold segment connecting the point E3 and the pole Pa.

(43) If the dimples are arranged sequentially in this manner, the dimples can be arranged to have a complete symmetry over the entire spherical body.

(44) As one of features of the dimple pattern in the spherical polyhedron division structure according to the present invention, with respect to the segments passing through the pole Pa (the segment connecting the point E1 and E7, the segment connecting the point E3 and E9, and the segment connecting the point E5 and E11), the dimples are arranged to be divided in half along each segment, or the dimples are arranged to be symmetric with each segment without the dimples touching the segment.

(45) More specifically, in FIG. 4, in the segment 10 connecting the point E1, the pole Pa, and the point E7, the dimples of the first row above the great circle 16 as the equator E with respect to the solid segment from the point E1 to the pole Pa as a center are arranged without touching, the dimples of the second row are arranged to be divided in half, the dimples of the third row are arranged without touching, and the dimples of the next row are arranged to be divided in half, in this alternating manner.

(46) In addition, in the segment 4 connecting the point E3 (separated by longitude 60° from the point E1), the pole Pa, and the point E9, the dimples of the first row with respect to the solid segment from the point E3 to the pole Pa as a center are arranged to be divided in half, the dimples of the second row are arranged without touching, the dimples of the third row are arranged to be divided in half, and the dimples of the next row are arranged without touching in this alternating manner. In this manner, according to the present invention, in the segments separated from the point of latitude 0 and longitude 0° by longitude 60° with respect to the pole as a center, the dimples are alternately arranged from the equator to the the pole (in the case where the dimples are arranged on the segment, the dimples are divided accurately in half by the segment), and the dimples are arranged to have a complete symmetry with respect to the segment.

(47) Hereinbefore, although the spherical polyhedron division structure and the dimple pattern in the northern hemisphere above the equator E dividing the spherical body constituting a golf ball into northern and southern hemispheres are described, the same spherical polyhedron division structure and dimple pattern are applied to the southern hemisphere below the equator E.

(48) In this case, it is preferable that the dimples having a diameter of 0.145 inch or more occupy 80% or more of the entire dimples and a total number of the dimples be in a range of 300 to 400 so that dimples can be arranged with uniform outer appearance over the entire spherical body including the northern hemisphere and the southern hemisphere.

(49) As described hereinbefore, according to the present invention, even in the case where large-sized dimples having a diameter of 0.145 inch or more are arranged in a spherical body constituting a golf ball, non-dimple portions can be minimized, so that the area ratio of dimples can be maximized. In addition, the dimples can be arranged to have a complete symmetry over the entire spherical body.