Abstract: Golf balls having a dimple pattern arranged in an icosahedral layout are disclosed. The dimple pattern has 20 substantially identical dimple sections, where each dimple section is defined by a spherical triangle. The dimples in each of the 20 dimple sections have at least three different dimple diameters including a minimum dimple diameter, a maximum dimple diameter, and at least one additional dimple diameter. The resulting dimple pattern has a surface coverage of about 70 percent or less. The reduced surface coverage helps to reduce the flight of the golf balls.

Abstract: Golf balls having a dimple pattern arranged in a tetrahedral layout are disclosed. The dimple pattern has four substantially identical dimple sections, where each dimple section is defined by a spherical triangle. The dimples in each of the four dimple sections have at least three different dimple diameters including a minimum dimple diameter, a maximum dimple diameter, and at least one additional dimple diameter. The resulting dimple pattern has a surface coverage of about 70 percent or less. The reduced surface coverage helps to reduce the flight of the golf balls.

Abstract: Golf balls having dimple patterns arranged in dipyramid layouts are disclosed. The patterns may be arranged in triangular dipyramid, quadrilateral dipyramid, pentagonal dipyramid, or hexagonal dipyramid layouts. The dipyramid patterns have six, eight, ten, or twelve substantially identical dimple sections, where each dimple section is defined by a spherical triangle. The dimples in each of the identical dimple sections have at least two different dimple diameters including a minimum dimple diameter and a maximum dimple diameter. The resulting dimple patterns have a surface coverage of about 70 percent or less. The reduced surface coverage helps to reduce the flight of the golf balls.

Abstract: Golf balls having a dimple pattern arranged in a tetrahedral layout are disclosed. The dimple pattern has four substantially identical dimple sections, where each dimple section is defined by a spherical triangle. The dimples in each of the four dimple sections have at least three different dimple diameters including a minimum dimple diameter, a maximum dimple diameter, and at least one additional dimple diameter. The resulting dimple pattern has a surface coverage of about 70 percent or less. The reduced surface coverage helps to reduce the flight of the golf balls.

Abstract: Golf balls having a dimple pattern arranged in an octahedral layout are disclosed. The dimple pattern has eight substantially identical dimple sections, where each dimple section is defined by a spherical triangle. The dimples in each of the eight dimple sections have at least three different dimple diameters including a minimum dimple diameter, a maximum dimple diameter, and at least one additional dimple diameter. The resulting dimple pattern has a surface coverage of about 70 percent or less. The reduced surface coverage helps to reduce the flight of the golf balls.

Abstract: A golf ball that is formed by a mold developed from a computerized modeling system such as CAD or CAE in combination with a CNC machine tool which superimposes a short waveform, or multiple waveforms, onto a longer base waveform to create a non-planar parting line that is functionally dependent on the underlying dimple geometry. The non-planar parting line is comprised of a plurality of peaks and valleys that are offset from the dimple perimeters, as not to bisect any dimple edge. Also, dimples on one side of the parting line interdigitate with dimples on the other side to form a more uniform distribution of dimples over the entire golf ball surface. Still further, the non-planar parting line has a amplitude which is less than 0.02 inch from an axis substantially coincident with the equator of the ball and the length of the parting line is less than 110 percent of the length of a curve defined by the circumference of the equator.

Abstract: A golf ball comprising a substantially spherical outer surface and a plurality of dimples formed thereon is provided. To pack the dimples on the outer surface, the outer surface is first divided into Euclidean geometry based shapes. These Euclidean portions are then mapped with an L-system generated pattern. The dimples are then arranged within the Euclidean portions according to the L-system generated pattern.

Abstract: A hitting face of a golf club head having improved flexural stiffness properties. In one embodiment, the hitting face is made from multiple materials. The main portion of the hitting face is a plate-like face made from a first material having a first density. A dense insert made from a second material having a second density that is greater than the first density is attached directly or indirectly to the plate-like face at or near the geometric center thereof. The dense insert increases the flexural stiffness of in a central zone of the hitting face so that a golf club head that has a larger zone of substantially uniform high initial ball speed. In another embodiment, the hitting face includes an insert that includes main plate and at least one wing extending therefrom. The insert is welded to the golf club head so that the main plate does not deflect separately from the remainder of the hitting face. The geometry of the insert controls the stiffness in the axial directions.

Abstract: A hitting face of a golf club head having improved flexural stiffness properties. In one embodiment, the hitting face is made from multiple materials. The main portion of the hitting face is a plate-like face made from a first material having a first density. A dense insert made from a second material having a second density that is greater than the first density is attached directly or indirectly to the plate-like face at or near the geometric center thereof. The dense insert increases the flexural stiffness of in a central zone of the hitting face so that a golf club head that has a larger zone of substantially uniform high initial ball speed. In another embodiment, the hitting face includes an insert that includes main plate and at least one wing extending therefrom. The insert is welded to the golf club head so that the main plate does not deflect separately from the remainder of the hitting face. The geometry of the insert controls the stiffness in the axial directions.

Abstract: A high performance golf ball having a reduced overall distance while maintaining the appearance of a high performance trajectory. The golf ball includes a combination of low CoR core and cover materials coupled with a less efficient aerodynamic dimple pattern that achieves a reduction in carry and overall distance of at least 5 yards versus a conventional golf ball, while still providing the look, sound, feel and apparent flight of a conventional golf ball. A high performance golf ball having a reduced distance is also achieved by maintaining the lift to weight ratio to be greater than 1.5 at a Reynolds number of about 205,000 and a spin rate of 2900 rpm.

Abstract: A golf ball dimple pattern based on a hexagonal dipyramid polyhedron is disclosed. Preferably, the dimple pattern disclosed by the present invention includes dimples that are arranged such that at least a portion of neighboring dimples have one or more predetermined diameter ratios. The dimples are arranged based on six substantially similar mating dimple sections on each hemisphere. Each of the six substantially similar mating dimple sections on each hemisphere share a dimple positioned at the pole of that hemisphere. The dimple pattern is capable of achieving a surface coverage of about 82% or greater.

Abstract: A hitting face of a golf club head having improved flexural stiffness properties. In one embodiment, the hitting face is made from multiple materials. Each material has a different tensile modulus of elasticity, where the center of the hitting face has a much higher tensile modulus of elasticity than the surrounding portions of the hitting face. This creates a stiff center and a more easily deflected concentric portion. In another embodiment, the materials have different yield strengths, where the center of the hitting face has a very high yield strength compared to the surrounding portions of the hitting face. The hitting face may then plastically deform around its periphery, while the center retains its original shape.

Abstract: A golf ball comprising a substantially spherical outer surface and a plurality of dimples formed thereon is provided. To pack the dimples on the outer surface, the outer surface is first divided into Euclidean geometry based shapes. These Euclidean portions are then mapped with an L-system generated pattern. The dimples are then arranged within the Euclidean portions according to the L-system generated pattern.

Abstract: A method for generating a textured surface for a golf ball is disclosed. Preferably, the textured surface of the golf ball substantially minimizes the drag experienced by the golf ball. The method includes generating a guide pattern. The guide pattern is preferably mapped to the surface of the golf ball. A shaped profile may also be generated. The textured surface of the golf ball may be generated based on sweeping the shaped profile along the guide pattern. It may be desirable to add protrusions or entrenchments to the surface of the golf ball to further reduce drag.

Abstract: The present invention relates to a golf club head with a hitting face. The hitting face comprises a directional control portion, which has at least two zones with different flexural stiffness, such that when the hitting face strikes a golf ball the two zones deform differently to selectively control the direction of the flight of the golf ball. The directional control portion may comprise an upper zone and a lower zone, where the upper zone has a lower flexural stiffness. Alternatively, the lower zone has a lower flexural stiffness. On the other hand, the directional control portion may comprise a left zone and a right zone, and either the left or right zone may have a lower flexural stiffness to selectively control the lateral launch angle either to the left of right.

Abstract: A hitting face of a golf club head having a location of longest characteristic time shifted away from the geometric center of the hitting face. In one embodiment, the hitting face is made from multiple materials. In another embodiment, the hitting face as a central zone that is thicker than the surrounding material. In another embodiment, a dense insert is attached directly or indirectly to a plate-like face insert at or near the geometric center of the insert. In another embodiment, the central zone of the hitting face is reinforced with ribs. In another embodiment, the central zone is elliptical with varying thickness. In this embodiment, the central zone minor axis is thinner than the major axis. The central zone is positioned within the hitting face such that the minor axis is oriented from the low heel region to the high toe region.

Abstract: A golf club head having selectively oriented zones of relatively high flexural stiffness is disclosed. The hitting face is configured and dimensioned so that it includes an inner zone and a concentric intermediate zone. The inner zone has relatively high flexural stiffness and the intermediate zone has relatively lower flexural stiffness. The inner zone may have an elliptical shape or a substantially parallelogram shape. Preferably, the inner zone has a shape that comprises a major axis and a minor axis and the major axis aligns substantially in the direction of high heel to low toe. This arrangement of inner and intermediate zones creates a gradient of flexural stiffness in the direction of high toe to low heel and produces a desirable manipulation COR in that direction.

Abstract: A hitting face of a golf club head having improved strength properties. In one embodiment, the hitting face is made from multiple materials. The multiple materials form layers of a laminate construction of a flat portion of a hitting face insert. The layers of the laminate are joined together using a diffusion bonding technique. Preferably, at least one layer of the laminate is a thin layer of a very strong material that forms the rear side of the hitting face insert so as to prevent failure of the hitting face insert on that rear side due to repeated impacts with golf balls.

Abstract: A golf ball having a plurality of dimples on its surface, the dimples as a whole are distributed on at least a portion of the golf ball based on Soddy circles. The portion of the golf ball may be triangulated, and Soddy circles may be generated based on the vertices of each triangle. Dimples may then be arranged according to the generated Soddy circles. Alternately, dimples within the portion of the golf ball may be distributed based on circle packing.

Abstract: The present invention relates to a golf club head with a hitting face. The hitting face comprises a directional control portion, which has at least two zones with different flexural stiffness, such that when the hitting face strikes a golf ball the two zones deform differently to selectively control the direction of the flight of the golf ball. The directional control portion may comprise an upper zone and a lower zone, where the upper zone has a lower flexural stiffness. Alternatively, the lower zone has a lower flexural stiffness. On the other hand, the directional control portion may comprise a left zone and a right zone, and either the left or right zone may have a lower flexural stiffness to selectively control the lateral launch angle either to the left of right.