Abstract: A two-piece golf ball of improved playing characteristics comprisinga core having a weight of substantially 34.4 grams anda cover having a weight of substantially 11.1 grams. The ball has a total weight of no more than 46.0 grams and a dimple pattern covering at least 70.0% of the surface of the ball.

Abstract: In a golf ball, dimples are arranged in its spherical surface such that a great circle which does not intersect with the dimples is not drawable on the ball surface, thereby preventing any drop of symmetry caused by the presence of a seam line. The dimples are further arranged such that a percent dimple volume VR given as (B/A).times.100% is in the range: 0.6%<VR<1.5% wherein a phantom sphere given on the assumption that the spherical surface of the ball is free of dimples has a volume of A mm.sup.3 and the sum of the volumes of dimples distributed throughout the ball is B mm.sup.3, thereby optimizing the percent dimple volume to ensure a longer carry.

Abstract: A golf ball having an octahedral pattern about its surface with four identical quadrants in each hemisphere. Each quadrant includes a circular area which fills the quadrant as completely as possible without crossing the quadrant boundaries. A dimple is located at each pole. Each circular area is substantially filled with dimples and the remaining interstitial areas between the circular areas and the poles are substantially filled with dimples while leaving a dimple free equatorial line.

Abstract: A golf ball of the present invention has a plurality of dimples on its surface. The dimples accounting for not less than twenty percent of a total number of dimples have a double radius shape in which the curvature of the bottom wall portion and the curvature of the peripheral wall portions extending from the upper end of the bottom wall portion to the opening of the dimple are different from each other. The double radius shape is set so that the relationship between a diameter D1 at the opening of the dimple and a diameter D2 at the inflection point falls within 0.95.gtoreq.D2/D1.gtoreq.0.50 and the relationship between the depth F to the deepest point of the dimple and the depth C to the inflection point falls within 1.00>C/F.gtoreq.0.85.

Abstract: In a golf ball having a large number of dimples formed on the surface thereof, the dimples comprise circular dimples 2 and oval dimples 3 in flat configurations thereof. The total of the oval dimples is set to more than 20% of the total of the dimples. All the dimples are arranged in such a manner that an average intersection acute angle .delta. made between a line connecting the center of each oval dimple and a pole of the golf ball with each other and a major axis of each oval dimple is set in a range of 0.ltoreq..delta..ltoreq.80.degree..

Abstract: In a golf ball having at least a set of large and small diameter dimples, the large and small diameter dimples are of the same cross-sectional shape in their lower portion. The small diameter dimple (2) has the same shape in cross-sectional view from a depth of 0.01 mm below the dimple (2) edge (3) to the bottom as that of the bottom portion of the large diameter dimple (1). A master model is prepared by feeding a cutter into a hemispherical surface of a master block to different depths while rotating the cutter, thereby forming a set of large and small recesses, respectively, wherein the large and small recesses have the same cross-sectional shape. The master model having plural types of dimples can be briefly fabricated and has increased freedom of design. Using the master model, a golf ball featuring uniform and densely distributed dimples can be manufactured.

Abstract: A golf ball having a plurality of dimples formed in its surface and a diameter of 43 to 45 mm, wherein when a phantom great circle is depicted on the ball surface to divide the ball into two hemispheres and one hemisphere is developed by Lambert conformal projection to depict a planar expansion chart, the dimples are arranged to with respect to the planar expansion chart so as to meet the requirement (I) that when the planar expansion chart has a center 0, two large and small regular triangles AABC and Aabc centered at 0 are depicted on the chart with corresponding two apexes aligned with an identical radial line from center 0, and the respective sides of the small regular triangle Aabc are extended to intersect with the sides of the large regular triangle AABC to define one regular triangle coincident with the small regular triangle Aabc, three trapezoids, and three parallelograms, six dimples are contained in the one small regular triangle, nine dimples are contained in each of the trapezoids, and four dimp

Abstract: The present invention refers to an arrangement of dimples on a golf ball which has a plurality of dimples on its spherical surface, The arrangement of dimples is made by dividing sphere's surface of a golf ball by great circles to form an octahedron, making the center of a spherical triangle in the said octahedron as a pole, and dividing again the said sphere's surface by great circles to form a new octahedron at the position turning on the said pole as a center in an angle of 60 degrees, and dividing again the said sphere's surface by great circles made by extending the lines connecting the adjacent midpoints of the sides of spherical triangle with a pole to one another, and dividing again the said sphere's surface by great circles made by extending the lines connecting the adjacent midpoints of the sides of spherical triangle at the position turning on the said pole as a center in an angle of 60 degrees to one another, and arranging dimples in the spherical polygons formed in dividing the said sphere's surf

Abstract: A solid golf ball having good controllability and long flight distance and having a solid core, a cover covering the core and dimples formed on the surface of the cover, wherein the cover has a Shore D hardness of 52 to 64 and the dimples satisfy the following equation:(Dimple area proportion (%)).times.(Total dimple volume (mm.sup.3)).div.100=220 to 270.

Abstract: In a golf ball a spherical surface of which is divided in such a manner as to correspond to the facets of a 12-20 hedron, dimple patterns having the same arrangement are disposed in spherical regular pentagons, the dimple pattern is constituted in such a manner that the dimple arrangement thereof is different from each other when viewed from the direction of each side of the spherical regular pentagon, and the directions of each dimple pattern in five spherical regular pentagons aligned on one side along each great circle path are different from each other in the same sequence with respect to each great circle path.

Abstract: A coated golf ball comprising:a golf body,a plurality of dimples disposed on the golf ball body, each of the dimples having an edge portion at the periphery of the dimple, and a slope portion connecting the edge portion to a bottom portion of the dimple, anda paint layer formed on the golf ball body and dimples.The average thickness of the paint layer on the surface of the golf ball body, the edge portion, the slope portion and the bottom portion is 20 to 40% of the depth of the dimple.

Abstract: 1. A golf ball having a generally spherical outer surface and a center, the outer surface being provided with a plurality of dimples, at least some of the dimples having a surface with an elliptical cross section which is a portion of an ellipse defined by the equation:X.sup.2 /A.sup.2 +(Y-k).sup.2 /B.sup.2 =1where X is a coordinate on an X axis which extends perpendicularly to a radial line from the center of the ball to the center of the ellipse, Y is a coordinate on a Y axis which is aligned with said radial line, A is one-half of the major axis of the ellipse which is aligned with said X axis, B is one-half of the minor axis of the ellipse which is aligned with said Y axis, and K is the distance along the Y axis between the center of the ellipse and the center of the golf ball.

Abstract: A thread-wound golf ball includes a wound core (3) consisting of a center (1) and a thread rubber layer (2) thereon, and a cover (4) having a plurality of dimples (5). The core (3) wherein the thread rubber layer (2) has a thickness of 5 to 9 mm and a larger weight than the center (1) is enclosed in the cover (4) made of an ionomer resin having a thickness of 1 to 2.5 mm and a Shore D hardness of 52 to 68. The ball has an outer diameter of 42.9 to 46 mm. The total volume of dimples is 300 to 400 mm.sup.3. The ball having a relatively large diameter and an increased amount of thread rubber provides an increased flying distance and improved feeling on impact.

Abstract: A golf ball having a multiplicity of dimples in its surface is adjusted to a weight of 40 to 45 grams and a diameter of 43 to 47 mm. The dimples occupy at least 60% of the ball surface and satisfy 0.35.ltoreq.V.sub.0 .ltoreq.0.60 wherein V.sub.0 is the volume of the dimple space below a circular plane circumscribed by a dimple edge, divided by the volume of a cylinder whose bottom is the circular plane and whose height is the maximum depth of the dimple from the bottom. The ball is improved in flying performance in that it offers an adequate trajectory and an increased flying distance when hit by an ordinary golfer with a head speed of about 40 m/sec. with a driver or long iron. Hitting feel is also improved.

Abstract: A golf ball weighing no more than 1.62 ounces and having a mean outside diameter of at least 1.70 inches. The core compression of the ball and the cover hardness are selected so as to provide a finished ball having a P.G.A. compression of 70 or less and a coefficient of restitution from 0.780 to 0.825.

Abstract: A golf ball includes a substantially spherical surface containing a plurality of dimples of differing diameter. Twelve spherical regular pentagons and twenty spherical regular triangles are arranged on the spherical surface in a manner corresponding to a dodecaicosahedron (12-20 hedron). Each pentagon shares a same asymmetrical dimple pattern such that each of five sides of each pentagon have a dimple pattern that differs from a dimple pattern on four other sides, and all of the pentagons share the same five differing side patterns. Six great circle paths are arranged about the spherical surface, each great circle path being bounded on one side by a series of five adjacent pentagons, one of which is a reference pentagon, and the other four of which are respectively and angularly displaced at angles of 72.degree., 288.degree., 144.degree. and 216.degree. with respect to the reference pentagon. A sequence of angular pentagon displacement of the series is consistent along all six great circle paths.

Abstract: A golf ball has a plurality of dimples in its spherical outer surface and its spherical outer surface is divided into the faces of an icosahedron consisting of 20 regular large spherical triangles. Six (6) great circle paths further divide the golf ball's spherical outer surface into the faces of an icosidodecahedron consisting of 20 regular spherical triangles and 12 regular spherical pentagons. The dimple covalent boundary lines are made evenly and uniformly parallel to the regular dividing lines between the regular spherical triangles and the adjacent regular spherical pentagons. The dimple covalent areas are made between the regular spherical triangles and the adjacent regular spherical pentagons. Therefore, the total surface area of dimples are maximized which is a characteristic of the golf ball.

Abstract: A golf ball of improved playing characteristics weighing no more than 1.62 ounces and having a mean outside diameter of at least 1.70 inches. A dimple pattern on the surface of the ball may include a plurality of dimples which have different diameters. The dimples cover at least 65% of the surface of the ball.

Abstract: A golf ball in the shape of a sphere having a core and an outer cover, said cover defining an outer surface with a plurality of non-annular dimples in said outer surface, each dimple having a predetermined dimple perimeter on said outer surface to define an enclosed area having a diameter the improvement wherein:a) each dimple has a bottom surface area spaced radially inwardly of said outer surface;b) said bottom surface area is substantially equal to the enclosed area defined by said perimeter; andc) said bottom surface area is a constant depth from said outer surface along said diameter.

Abstract: The invention relates to a golfball having a plurality of dimples in its outer spherical surface The dimples have various sizes and depths and are configured in a pattern that is based upon dividing the golfball's surface into a spherical octahedron having eight octahedral triangles and a spherical hexaoctahedron having eight hexaoctahedral triangles and six hexaoctahedral quadrangles. The two poles of the golfball are located within centers of oppositely facing octahedral triangles ("pole triangles"). The remaining six octahedral triangles ("equator triangles") are intersected by the golfball's equator through the two of their three midpoints that are not in contact with the pole triangles.Six dimples of equal size (having equivalent diameters) are placed in a circle around the centers of each of the eight octahedral triangles.

Abstract: A golf ball construction comprising a core and cover, the ball defining an equator forming a first great circle extending over the cover surface. At least two additional great circles extend over the cover surface and intersect the first great circle, the additional great circles being spaced apart equally with respect to each other whereby the ball surface is divided by the combination of the first great circle and the additional great circles into a plurality of discrete symmetrically arranged surface areas. A separate array of spaced-apart dimples is formed on the cover surface within each of the discrete surface areas, each of the arrays covering substantially completely the cover surface in each discrete surface area. Channels are formed exclusively within each area and extend between adjacent ones of the dimples in each area, a channel extending from each dimple to every other dimple adjacent thereto. None of the channels cross any of the great circles.

Abstract: A golf ball defining a spherical outer surface and a plurality of spaced-apart dimples formed in the surface. The dimples comprise a central raised portion and a surrounding depressed portion with the depressed portion having a lateral dimension along any straight line extending through the center of the central portion and from one outer edge to the opposite outer edge of the depressed portion. The maximum depth of the depressed portion is from 0.008 to 0.015 inches and the raised portion extends outwardly from the depressed portion to the position of the spherical outer surface. The maximum lateral dimension of the raised portion, measured parallel to the spherical outer surface, is less than one-half the minimum lateral dimension of the depressed portion. The total effective volume of the dimples comprising the cumulative volume occupied by the depressed portions of all dimples formed in said surface is greater than 0.021 cubic inches.

Abstract: In the golf ball having a large number of dimples on its surface, a golf ball characterized in that dimples are arranged so as to satisfy the following condition for the plane development obtained by drawing imaginarily a great circle line to bisect the golf ball on the golf ball surface and developing the semisphere by the Lambert's equivalent projection. The center of the plane development is assigned to 0, drawing two large and small regular triangles .DELTA.ABC and .DELTA.abc centered at this 0 such that each vertex is in the same direction from the said center 0, extending each side of said small regular triangle .DELTA.abc so that it intersects each side of the large regular triangle .DELTA.ABC, thereby forming one regular triangle coinciding with said small regular triangle .DELTA.abc, three trapezoids, and three parallelograms, and arranging respectively 6 dimples in said one small regular triangle, 9 dimples in said trapezoid, and 4 dimples in said parallelogram.

Abstract: In a golf ball according to the present invention, dimples formed on the surface thereof have the same diameter and are classified into first group dimples and second group dimples, and optionally different kinds of dimples within each group, the dimples of one kind differing in depth from the dimples of another kind within that group, each of the first group dimples having a depth substantially the same which is greater than the depth of each of the second group dimples which is also substantially the same for all the second group dimples. The depth of the first group dimple is from 130% to 280% of that of the second group dimple. Further, the number of the first group dimples is from 20% to 80% of the total number of the dimples.