Abstract: A golf ball made by adding bismuth, bismuth alloy or a mixture of bismuth alloy in bismuth to the resin compositions in amounts of 0.5-60 parts by weight per 100 parts by weight of the base resin of the said golf ball, which the carry extends farther than the other common golf balls without raising a hardness. It is because, as molding the said golf ball with the resin compositions which is added bismuth or bismuth alloy, cooling the moldings at a normal temperature after molding, bismuth or bismuth alloy gets solidified and expanded its volume by 3-3.5% and the organic polymeric materials grow dense as much as bismuth expands, that hold a lot of energy. Additionally, since this can be applied to all the core and the cover or selectively to each part, it is possible to make the golf balls with various properties that may give a satisfaction to all sorts of golfers. Furthermore, the golf balls according to the present invention is soft to the touch, which has a good hit feeling.

Abstract: The present invention refers to a golf ball having projections in a form of dome, in a form of cut sphere, in a form of polyhedron, in a form of spherical polyhedron, in a form of which the base is in polygon and the sides are round and plane like the side of cut cone, in a form of which the base is in circle and the sides are round and plane like the side of cut cone or with a small dome put on each of cut top. The surface of the said inner cover can be made of projections of one kind on the whole or projections of a different kind. Meanwhile, it is possible to make the projections of one kind or more than two kinds that are different in a size or height. The said projections also may be apart from each other at regular intervals or may be in contact with each other, and in some cases, some projections may be in contact and some projections apart from each other.

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 non-wound three-piece golf ball which comprises an inner core, an outer layer and a cover, the inner core having a diameter of 23-35 mm and a hardness (Shore D) of 30-62, the outer layer having a diameter of 36-41 mm and a hardness (Shore D) of 30-56, the golf ball having a hardness (Shore D) 46-62 at the outer site in the inner core, which is 11.5-17.5 mm apart from the center of the ball. The golf ball has a maximum hardness (Shore D) in the range of 46-62 at the outer site of the inner core which is located at the interface between the inner core 1 and the outer layer 2 of the golf ball and the hardness then decreases both inwardly and outwardly.