Abstract: A golf ball has no great circles intersecting dimples. A method for manufacturing the golf ball uses the steps of molding the golf ball with a pair of semispherical molds having many dimple patterns formed on the inner surface thereof so as to form first dimples on the surface of the golf ball. Then a burr formed on the connecting portion between upper and lower molds is removed and dimples are subsequently formed and/or corrected on the connecting portion.

Abstract: A golf ball having 280 to 540 dimples including plural types of dimples of different surface configurations such as circular dimples or regular polygonal dimples formed thereon. The percentage of dimples unadjacent to dimples of different surface configurations is less than 30 of the total number of dimples so that one dimple is adjacent to many dimples of different configurations.

Abstract: A golf ball has one great circle and four one-half great circles which all intersect no dimples. Eight end points which include two end points of each one-half great circle are formed at the one great circle. These end points do not coincide with each other on the great circle. One of the one-half great circles intersects the other one-half great circle at a right angle at the middle point thereof on each of the great circle. In other words, an upper semispherical mold for an octahedral dimple golf ball arrangement is rotated a certain angle relative to the lower mold such that two of the three great circles are divided into four one-half great circles. The parting line of the mold becomes the one remaining great circle. In this manner, a more uniform flight of the golf ball canbe obtained regardless of whether the ball is hit on a seam, semi-seam of non-seam area.

Abstract: A golf ball has dimples arranged in eight spherical equilateral triangles obtained by projecting, on the imaginary spherical surface of the golf ball, the ridge lines of a regular octahedron inscribing the imaginary spherical surface. Three great circles corresponding to the ridge lines being projected on the spherical surface. One great circle coinciding with a mold seam is formed as the sole great circle unintersecting dimples and the other two great circles intersect dimples. Between 300 to 550 dimples are formed in the golf ball with the dimples being equivalently arranged in each of the eight spherical equilateral triangles.

Abstract: A golf ball having circular dimples and noncircular dimples arranged in different percentages depending on the spherical zones, whereby a favorable aerodynamic property is obtained by eliminating the difference in trajectories between line hitting and face hitting.

Abstract: A golf ball with dimples disposed in a regular octahedral arrangement having a superior symmetrical property so as to arrange dimples symmetrically in each of numerously divided regions without deteriorating the symmetrical property of the golf ball and by varying volumes of dimples adjacent to each other at a specified ratio with diameters thereof equal to each other, thereby to provide a symmetrical property and uniformity for flying a long distance.

Abstract: The present invention relates to a golf ball having dimples and a plurality of great circles unintersecting the dimples in which the specification of the dimples is set 1.02.ltoreq.VL/VF.ltoreq.1.20 where L is a zone ranging from each of the great circles to each of the circumferences corresponding to a central angle of less than approximately 10.degree.; F is a zone other than the L zone; the volume of each dimple arranged in the L zone is VL; and the volume of each dimple arranged in the F zone and having approximately the same diameter as that of said dimple arranged in the L zone is VF.

Abstract: The method of making a family of golf balls, each ball having substantially identical carry characteristics in both the pole and seam hitting modes and having between 300 and 600 dimples arranged on the spherical surfaces thereof, comprising the steps:projecting a cubic octahedron (2) on the spherical surface of a said golf ball to provide four great circle paths (6) thereon defining six spherical squares (5) and eight spherical triangles (4) on the said surface;placing a plurality of dimples in each said square and triangle without intersecting said dimples and said great circle paths; andselecting the number of dimples in each said square and triangle such that the total number of dimples on said ball is a natural number satisfying one of the following formulae:(4m.times.6)+(3n.times.8)((4m+1).times.6)+(3n.times.8)(4m.times.6)+((3n+1).times.8((4m+1).times.6)+((3n+1).times.

Abstract: A golf ball which comprises a spherical surface having a parting line at its equator and having a plurality of dimples formed thereon,wherein the dimples are formed so that the ratio, y, of the sum total of the flat surface area of the dimples to the surface area of the same sphere having no dimples formed thereon is within the range((0.046) (X).sup.1/2 -0.172)+0.04.gtoreq.Y.gtoreq.((0.046)(X).sup.1/2 -0.172)-0.04wherein X represents the total number of dimples;and wherein a dimple lying within a region S, which extends from 30.degree. below the parting line to 30.degree. above the parting line, has a value VS, and a dimple of the same diameter only lying within the region P, which comprises the surface of the sphere that is not within region S, has a volume VP, such that the ratio of the volumes of dimples having the same diameters but in different regions is within the range of;1.02.ltoreq.VS/VP <1.10, when y<0.70,1.10.ltoreq.VS/VP, <1.18, when 0.70.ltoreq.y<0.80, and1.18.ltoreq.VS/VP, when 0.

Abstract: A golf ball which includes a spherical surface circumscribing a cubic octahedron, eight spherical triangles (4) and six sperical squares (5) divided by imaginary lines obtained by projecting edge lines (3) of the cubic octahedron (2) onto the spherical surface, and dimples (D) arranged within the spherical triangles (4) and the spherical squares (5) approximately equally and in point or line symmetry without intersecting the imaginary lines, with the total number of the dimples (D) being set in a range of 300 to 600 pieces, and one zone (6A) of great circle zones (6) obtained by connecting the imaginary lines being adapted to coincide with a parting line of a split metallic mold.

Abstract: Disclosed is a large size three piece solid golf ball comprising a center, an outer layer covering said center to form a solid core and a cover covering said solid core, wherein said center has a diameter of 15 to 24 mm and a center hardness of 25 to 50 (JIS-C), prepared from a rubber composition comprising 100 parts by weight of cis-1,4-polybutadiene, 9 to 20 parts by weight of zinc acrylate and 3 to 150 parts by weight of a zinc oxide, said solid core has a diameter of 36 to 40 mm and a surface hardness of 70 to 90 (JIS-C), a difference between the center hardness and the surface hardness of the solid core is 20 or more and the specific gravity of the center and the outer layer has the following relation;a specific gavity of the center.gtoreq.a specific gravity of the outer layer, andthe specific gravity of the center.gtoreq.1.1.

Abstract: A golf ball having a spherical surface with a great circle zone along a parting line, the surface being divided by a central angle .theta. of the sphere of 10.degree..ltoreq..theta.<60 above and below the parting line to form a central S region and a polar P region. A plurality of kinds of dimples are arranged in both the S region, SD.sub.n, and the P region, PD.sub.n, the dimples of each region being geometrically symmetric about the parting line. The curvatures diameters, depths and volumes of the dimples within a region differ between kinds of dimples. At least one type of dimple in the S region has a corresponding type of dimple in the P region, the correspondence being equal curvature. The value of the volumes of the corresponding pairs of dimples are set such that 1.0223 VSD.sub.n /VPD.sub.n .ltoreq.1.25.

Abstract: The present invention is directed to a golf ball wherein a projection is circularly formed on the bottom of a dimple so as to increase the drag coefficient of the golf ball, whereby the golf ball can be prevented from flying a long distance.Supposing that the largest diameter of said projection is D1, the diameter of said dimple is D2, and L=D1/D2,an equation of 0.1.ltoreq.L.ltoreq.0.9 is determined;supposing that the height of said projection 11 is H1, the virtual greatest depth of said dimple is H2, and K=H1/H2,an equation of 0.6.ltoreq.K.ltoreq.1.0 is determined; andthe number of dimples ranges from 250 to 600.

Abstract: Disclosed is a three-piece solid golf ball comprising a solid core consisting of an inner core and an outer shell surrounding said inner core, and a cover covering said solid core, characterized in that a diameter of said inner core is 29 to 36 mm, a diameter of said solid core is 37 to 41 mm, a central hardness (JIS-C) of the inner core is 25 to 70, a surface hardness (JIS-C) of said outer shell is 80 to 95, a difference between said central hardness of the inner core and said surface hardness of the outer shell is 10 or more, and the relation between the specific gravity of the inner core and the specific gravity of the outer shell satisfies 1.0 <a specific gravity of the inner core .ltoreq.a specific gravity of the outer shell <1.3.

Abstract: An improved golf ball which includes a golf ball main body, and large dimples having a large diameter A and small dimples having a small diameter B which are formed in a large number on the peripheral surface of the golf ball main body. The large and small dimples are provided in the ratio of the diameters A/B within the range of 1.25 to 1.50.

Abstract: A golf ball having a plurality of different kinds of dimples formed on a spherical surface thereof is disclosed. In one embodiment, a plurality of four different kinds of dimples is formed on the spherical surface of the golf ball. The differences between the kinds of dimples can be a difference in diameter, in depth, or a combination of diameter and depth. The ratio of the product of the diameter and the depth of the largest dimple, to the product of the diameter and depth of the smallest dimple, is in the range of 1.5 to 2.0. Smooth portions are formed on the remainder of the spherical surface to such a size that a dimple having an area larger than an average area calculated from the respective areas of each kind of dimple constituting the plurality of different kinds cannot be formed. The total number of dimples ranges from 300 to 560, and there is a maximum of one great circle zone not traversing a part of any dimple.

Abstract: A golf ball provided with two to four different sizes of dimples in the form of a 20-12 hedron and having different diameters from each other which vary in a ratio of 1.25-1.50, with the dimples being equally spaced over the entire surface of the golf ball, such that the flow of the air at every cross section crossing at right angles to the rotational axis of the golf ball is made equal, and at the same time, the angular difference between separation points of the dimples is minimized.