Abstract: A golf club head (20) having a thin striking plate (30) with a smooth exterior surface and a thin layer (35) disposed on the exterior surface (53). The thin layer (35) has a plurality of scorelines (75) that absorb the shock during impact with a golf ball. The striking plate (30) has a thickness in the range of 0.010 inch to 0.200 inch, and the thin layer (35) has a thickness in the range of 0.003 inch to 0.050 inch. The striking plate (30) may have a uniform thickness or a variable thickness.

Abstract: A golf club head with a body having a ball striking zone with an outer face for contacting a golf ball and an inner face. The body further having a web integral with the inner face of the striking zone to reinforce the striking zone. The integral web having a hub and a plurality of spokes radially extending from the hub. The golf club head is made from a composite resin, formed by injection molding.

Abstract: A golf club head comprises a ball striking face having a loft angle of from 6 to 30 degrees, and has a depth of the gravity center of not less than 18 mm, wherein the ball striking face is provided with a high frictional region of which maximum static friction coefficient at a high load of 400 kgf is not less than 0.35 whereby back spin of a hit ball is decreased and the flying distance of the ball can be increased. The high-load friction coefficient can be obtained by means of surface treatment, for example, etching, blasting, polishing, spraying a metal compound, vapor deposition of a metal compound and the like.

Abstract: A golf club head having a face with a plurality of shorelines that have a contour with a continuous curvature is disclosed herein. The face has a thickness that is less than 0.110 inches, and each of the scorelines have a depth that is greater than 0.012 inches. The width of each of the scorelines may be between 0.028 inches and 0.032 inches. Each of the scorelines may have a contour with a first convex section, a concave section and a second convex section. Preferably, the face is composed of a forged titanium material. However, the face and/or club head body may be composed of steel, other metals and composite materials.

Abstract: A golf club head having a striking plate with variable roll radius of curvature and a variable bulge radius of curvature is disclosed herein. The striking plate preferably has a large surface area which requires correction of off-center shots. The striking plate may be used on a fairway wood-type golf club head or a driver-type golf club head. The striking plate is preferably composed of steel or titanium.

Abstract: A golf club head (20) having a thin striking plate (30) with a smooth exterior surface and a thin layer (35) disposed on the exterior surface (53). The thin layer (35) has a plurality of scorelines (75) that absorb the shock during impact with a golf ball. The striking plate (30) has a thickness in the range of 0.010 inch to 0.200 inch, and the thin layer (35) has a thickness in the range of 0.003 inch to 0.050 inch. The striking plate (30) may have a uniform thickness or a variable thickness.

Abstract: Iron and wood type golf club heads having an improved ball striking face configuration including various combinations of punch marks and grooves on the ball striking face.

Abstract: A golf club head having a face with a plurality of scorelines that have a contour with a continuous curvature is disclosed herein. The face has a thickness that is less than 0.110 inches, and each of the scorelines have a depth that is greater than 0.012 inches. The width of each of the scorelines may be between 0.028 inches and 0.032 inches. Each of the scorelines may have a contour with a first convex section, a concave section and a second convex section. Preferably, the face is composed of a forged titanium material. However, the face and/or club head body may be composed of steel, other metals and composite materials.

Abstract: The high spin golf club uses modified grooves for use on all types of known golf clubs, wherein the modified grooves maximizes control of the golf ball through increasing backspin. The high spin golf club's modified grooves can be used alone or in a combination with conventional grooves to tailor the properties of the club face. The modified grooves are of varied configurations and all modified grooves can be used in combination with any other modified or conventional grooves to maximize the backspin of the golf ball and tailor the spin properties of the face of the club. Further a method for making high backspin golf clubs that reduce cover damage of golf balls is disclosed.

Abstract: A golf club has grooves across its face that are angled from an upper face section positioned relatively toward a toe of the club to a lower face section positioned relatively toward the heel with respect to the sole of the golf club instead of being parallel with a sole of the club. The angled grooves cause a sideways spin to be imparted to a struck golf ball. In one application, the angled grooves impart a spin that corrects for what would otherwise be a slice. The grooves can be at different angles, depending upon the golf club and the application. In an embodiment, the low irons and woods will have the grooves at a relatively higher angle than the mid irons, which will have the grooves at a higher angle than the approach irons and wedges. Clubs having such angled grooves can be structured according to USGA or other rules, but need not be.

Abstract: A golf club head is disclosed, which comprises a hollow structure composed of a face portion constituting a ball hitting face, a crown portion and a sole portion each provided successively from the face portion, and a plurality of grooves provided in the face portion. Depths of the grooves are gradually changed in accordance with a position of the face portion.

Abstract: A self-aligning, low or no self-torque club that is both statically- and dynamically-balanced is provided which is less prone to deleterious effects during its approach to and while striking the ball Static balance is achieved by ensuing the shaft axis intersects the line between the geometric center of the club face and the center of gravity of the club head. The club is self-aligning because the center of gravity naturally follows the shaft and since the shaft and center of gravity are in-line with the face center, the possibility of striking the ball with the club face square increases. By providing a symmetrical and, preferably elliptical face, forces due to air resistance act equally on both sides of the face with respect to the shaft further aligning the club face with the swing path. To further alignment, the club head may also be provided with a series of convergent channels in the direction of air flow over the club.

Abstract: A wood-type golf club head is provided with vertical grooves adjacent at each end of the ball hitting surface in order to enhance the desired gear effect when balls are hit on the toe and heel of the club.

Abstract: A strike face of a golf club head comprises a plurality of arched grooves formed by extending each pair of top edges respectively of two lateral walls in a groove on a back of each unit strike face between each pair of neighboring score lines in a strike face of a golf club head. In this way, the cutaway section on the back of the strike face looks like an arched bridge and the weight decrement of the arched grooves can be used for changing the center of gravity of the golf club head.

Abstract: A putter type golf club head having a variety of ball striking face configurations including free standing, raised projections, punch marks, vertical and horizontal grooves and combinations thereof.

Abstract: The present invention relates to an improved golf club head having a ball striking face with vertical grooves and intermediate vertical land areas between the grooves. The club head includes a resonator system having specific resonant frequencies which are determined by the specific variable width and depth combinations of vertical grooves and specific variable widths of the land areas between the vertical grooves. This controls the harmonics and feedback of a golf club head when it is used to stroke or strike a ball. In accordance with the invention, having more land area between the vertical grooves, creates a lower frequency resonance when striking a golf ball resulting in more energy transfer to the ball from a greater surface contacting the ball. Having less land area where the vertical grooves are closer together, creates a higher frequency resonance and somewhat less energy is transferred to a golf ball struck by the club head, thereby providing a softer feel.

Abstract: A golf club for imparting a desired spin to a golf ball. The golf club includes a club head having a cavity formed in its club face for securing a removable insert. The insert includes a striking face with a preferred frictional surface for imparting spin to a golf ball.

Abstract: A golf club has grooves across its face that are angled with respect to the sole of the golf club instead of being parallel with the sole of the club. The angled grooves cause a sideways spin to be imparted to a struck golf ball. In one application, the angled grooves impart a spin that corrects for what would otherwise be a slice. The grooves can be at different angles, depending upon the golf club and the application. In an embodiment, the low irons and woods will have the grooves at a relatively higher angle than the mid irons, which will have the grooves at a higher angle than the approach irons and wedges. Clubs having such angled grooves can be structured according to USGA or other rules, but need not be.

Abstract: A front face part of a golf club head is made thin plate-shape and existent grooves are on the front surface, gaps are established between the front face part and a head main body, and the front face part is combined with thin rib-shaped members only to the rear of the front surface portions of the front face part where the existent grooves are located and further the other ends of the rib-shaped members are combined with the head main body. By this structure, when hitting a ball in the rough, pressures become very high on edges of the grooves because it is hard around there. The edges cut off grass etc. and dig into a ball, and more backspin is produced.

Abstract: A golf putter including a head having a face, a shaft and a grip. The face comprises a centered first face, a second face formed on one side of the first face and inclined inwardly, and a third face formed on the other side of the first face and inclined inwardly. A plurality of friction protrusions are formed on the surface of the first face for improving the contact resistance. A plurality of spin protrusions are formed in the shape of steps on the surface of the second and third faces, respectively, so that a golf ball collided therewith rotates inwardly. Therefore, under any topographical condition, that is, a relatively flat green or an inclined green, the golfer can putt the ball directly into the hole without having to consider the curvature of the golf ball to the right or left side, thereby improving the accuracy of the putting operation.

Abstract: A golf club has grooves across its face that are angled from an upper face section positioned relatively toward a toe of the club to a lower face section positioned relatively toward the heel with respect to the sole of the golf club instead of being parallel with a sole of the club. The angled grooves cause a sideways spin to be imparted to a struck golf ball. In one application, the angled grooves impart a spin that corrects for what would otherwise be a slice. The grooves can be at different angles, depending upon the golf club and the application. In an embodiment, the low irons and woods will have the grooves at a relatively higher angle than the mid irons, which will have the grooves at a higher angle than the approach irons and wedges. Clubs having such angled grooves can be structured according to USGA or other rules, but need not be.

Abstract: Golf club heads are disclosed which have face surface shapes which are designed so as to reduce the scatter of the points where the ball stops after a hit, as compared to face surface shapes of prior art. This is accomplished by use of optimum face surface shapes which respect the USGA requirement for no degree of concavity. The face surface shapes disclosed are different in upward directions from the hit center to the face surface shapes in downward directions.

Abstract: An improved golf putter which includes a shaft having an enlarged gripping portion and a putting head having an array of hollow rigid spikes projecting from the face of the putting head. The spikes are designed to impart an immediate rolling or top spin motion to the golf ball. The putting head is positioned on the shaft in a precise manner so that the putter is exceptionally balanced. The spikes can be attached to a separate plate which plate may be attached to existing putters.

Abstract: A golf club head comprises a main body that defines a front face. The front face includes a plurality of projections extending from the front face. The ends of the projections define a plurality of individual contact surfaces for striking a golf ball. The plurality of projections prevent a golf ball from contacting the front face thereby resulting in a change of the golf ball general contact area. A golf club incorporating the club head provides improved control of a golf ball and also provides improved feel when the club head impacts a golf ball.

Abstract: A golf club head has a sweet spot defined by a central axis of the club face, and an elongated smooth surface extending in its elongated direction along at least a portion of the central axis and overlying the sweet spot. A first set of approximately parallel score lines are located on one side of the central axis, and a second set of approximately parallel score lines are located on an opposite side of the central axis. Each score line is oriented upwardly at an oblique angle relative to the central axis to impart spin about spin axes extending approximately in a direction of the score lines and at oblique angles relative to the central axis of the club face for correcting a direction of impact resulting from mishitting the ball toward the toe portion or the heel portion of the club face.

Abstract: A club head for a golf club a front surface and a rear surface and defines a front surface recess having a bounding interior wall of arcuate configuration. A member is resident at least in part in the club head recess and defines a front surface for hitting engagement with a golf ball and a rear surface secured to the interior wall of the club head and having the same arcuate configuration as the interior wall of the club head. The member front surface defines pyramid-like projections thereon and has the same arcuate configuration as the member rear surface.

Abstract: A golf club with decreased air resistance in swinging to improve a head speed. A number of depressions 26 are formed on a back 4, a crown 6 and the side surfaces of a heel 7 and toe 8 of a head 1 of a wood club for example. Each depression 26 has a first side narrower than a second side thereof so that it is egg-shaped. The section of each depression 26 is formed smooth such that a slope at the first side is more gentle than that at the second side. Each depression 26 is desirably so oriented that its comparatively gentle slope is positioned at the face 3 side. Owing to these gentle slopes, the generation of a dead air region is suppressed at the inflow side of each depression 26, thus further decreasing an air resistance in swinging.

Abstract: A golf club, comprises a face member, a hollow head body located behind the face member and having an opening for mounting the face member, a shaft-mounting pipe to be welded to the hollow head body, a shaft fixed to the shaft-mounting pipe and a pipe-retaining groove for retaining the shaft-mounting pipe in such a manner that the shaft-mounting pipe contacts a predetermined position on the hollow head body to which the shaft-mounting pipe is welded to thereby determine the fixing angle of the pipe with respect to the hollow head body. The fixing angle of the shaft mounting pipe is readily set in a state in which the pipe is held in contact with the pipe-retaining groove. The face member and the head body are made of a .beta.-type titanium alloy, and the hollow head body has a substantially uniform thickness throughout the wall thereof and is thinner than the face member.

Abstract: A golf club head is provided with an impact surface formed of a shape memory alloy. The shape memory alloy is selected to have a transformation temperature applicable for the range of normal golf playing temperatures, that is in the range between about 0 and 15 degrees C. This selection of the transformation temperature of the impact surface provides an effective variation of the stiffness of the golf club head that compensates for changes of the stiffness of a golf ball with changing temperatures.

Abstract: Disclosed herein is a game ball, such as a golf ball, having an indicia formed from a UV curable ink containing aluminum trihydroxide (ATH) filler. The ATH improves pad transfer of the ink. An ink composition suitable for pad printing, and a method for applying an indicia to a game ball also are disclosed. The UV curable ink has excellent pad transfer properties, and good durability.

Abstract: A golf club ball-striking face (6) utilizing a metal with ten times or higher damping capacity compare to the steels presently in use for club faces. The metal has the strength near that of the steels. The preferred metal is of the class of shape memory metals of alloys including: copper, nickel, aluminum, and manganese. The face is an insert plate whose front ball striking surface is narrower than its rear surface and is secured into a cavity formed in the club head, where the plate may be as thin as 0.010 inches or the plate may extend to nearly the entire thickness of the club head.

Abstract: A correlated set of iron-type golf club heads, wherein each head in the set employs the same sized vibration damping plaque. Each club head includes a substantially planar blade element having a front striking face for impacting a golf ball, and a rear surface opposite the front striking face. A perimeter weighting element is formed integrally with at least a portion of the outer perimeter of the rear surface and extends substantially rearwardly from the rear surface. The remainder of the rear surface not covered by the perimeter weighting element defines the bottom of an open cavity which is substantially surrounded by an inner peripheral surface of the perimeter weighting element. The area and shape of the remainder of the rear surface that defines the bottom of the open cavity are substantially identical in each club head of the correlated set, thus making it possible to use the same sized and shaped vibration damping plaque in each club head.

Abstract: A new clubhead having a plurality of grooves extending between defined boundaries on the face surface of the clubhead has been developed. In one embodiment, two groups of grooves are arranged to only intersect at a vertical boundary that intersects the center of the sweet spot on the face surface to form a chevron pattern within the define boundaries. In an alternate embodiment, the two groups of grooves traverse fully across the defined grooved area of the face surface to intersect to form a plurality of parallelogram-shaped areas within the grooved area.

Abstract: A set of golf clubs including a number of golf clubs which are numbered serially and having progressively increasing loft angles from long irons to short irons. In a cross section of a number of face line grooves arranged on a striking face, the striking face and a groove slope face form a corner portion having a cross-sectional angle which decreases gradually from the long irons to the short irons.

Abstract: The invention involves a golf club which has a ball striking surface with horizontally extending grooves on it in which the upper edges of the grooves are harder than the lower edges. The upper edges of the grooves on the ball striking surface are selectively made harder either by directional or non-directional surface treatment processes or by making them from materials which are harder than the materials from which the lower edges of the grooves are made.

Abstract: A golf driver club and a method for making a golf driver club comprising the steps of:applying a curable coating composition comprising polytetrafluoroethylene to exterior surfaces of a driver head to provide a wet coated driver head;drying the wet coated club driver head by heating at elevated temperatures of from about 350.degree. F. to about 400.degree. F. for from about 4 to about 10 minutes to provide a dried driver head;curing the dried driver head by heating at an elevated temperature of from about 790.degree. F. to about 820.degree. F. for a period of from about 4 to 8 minutes, and thereafter, heating at a temperature of from about 700.degree. F. to about 800.degree. F. for a period of from about 10 to about 30 minutes to provide a driver club head having a cured, firmly adherent coating disposed thereon.

Abstract: An iron-type golf club head for realizing free weight distribution of a head with a face made thinner. A flatted surface 1A of a head body 1 is formed with a plurality of honeycomb-shaped cavities by forging. Owing to the advantages associated with the forging and the honeycomb shape, a face 4 can be made thinner, while avoiding the deterioration of the strength of the face 4. Thus, a surplus weight thus obtained can be distributed to other parts of the head body 1.

Abstract: When a plurality of grooves extending from the toe side to the heel side are disposed in a plurality of upper to lower rows in a face of a wood type golf club head, these grooves are disposed on the lower portion side of the face and the upper portion side of the face is slicked without disposing the grooves. This arrangement can make a flying distance of a ball greater than by conventional golf club irrespective of rain or shine.In place of the construction wherein the upper portion side of the face is slicked, it is possible to employ the construction wherein the gaps between grooves disposed on the upper portion side of the face are greater than those between grooves disposed on the lower portion side, or the construction wherein each width of grooves disposed on the upper portion side of the face is smaller than that of grooves disposed on the lower portion side.

Abstract: A putter type golf club having a series of V-shaped grooves positioned immediately adjacent each other forming outermost ball gripping edges which grip a golf ball when the ball is struck by the putter.

Abstract: A two-sided removable pad for use on a golf club having a substantially planar club face surface for striking a golf ball. A ball contact surface having a plurality of ridges effects the rotation of a struck golf ball. An adhesive on a second side of the pad for application to the club face. The pad is easily removably adhered to the club face surface.

Abstract: A device for use on a golf club having a substantially planer club face surface for striking a golf ball. The device is a two-sided removable pad having a ball contact surface on a first side which includes a plurality of ribs to impart back spin to a struck golf ball. Each rib has a multitude of peaks and valleys, each said valley connecting to an adjacent peak by an inclined surface and to another adjacent peak by a horizontal surface. The pad has an adhesive coating on a second side for temporary application to the golf club surface.

Abstract: A new golf club face design is disclosed in which different regions of grooves are provided in the vertical direction of the club face to impose different roll/bite characteristics on a golf ball depending on where the golf ball contacts the club face. In one embodiment, the golf club face has three characteristic regions of different types of grooves in the vertical direction of the club face. Different irons within the golf club set can also have different characteristic grooves in the three defined regions of the club face.

Abstract: A method for manufacturing a golf club head, which enables a face to be formed thinner to realize a more free distribution of weight. A flat surface 1A of a head body 1 is formed with plural cavities 6 to strengthen a face 4. Thus, the face 4 can be made thinner, which enables the distributing of thus obtained surplus weight to other parts of the head body 1. Each cavity 6 is disposed opposite to an area 9A between adjacent score lines 5. Accordingly, sufficient thicknes A of the face 4 can be guaranteed to prevent the degradating of strength caused by forming the thinner face 4.

Abstract: An iron-type golf club head having a larger sweet area while insuring a strength of a head. A back surface 1A of a metallic head body 1 is formed with plural rectangular cavities 5, 5A of different dimensions, opposite to the face 4 of the head body 1. The cavities 5, 5A are formed by forging, thus forming even and fine tissues and grain flow. Accordingly, the toughness and durability of material can be enhanced, so that the face 4 can be made thinner to a 1.0 to 3.5 mm thickness for an optimal weight distribution. As a result, a larger sweet area can be realized without damaging a strength of head.

Abstract: A golf club head includes a heel end, a toe end, and a front face arranged for impact with a golf ball. A plurality of elongated grooves are formed in the front face of the body. A pair of visual indicators are provided on the front face and are aligned with one of the grooves. One of the visual indicators is aligned with a heel end of the groove, and the other visual indicator is aligned with a toe end of the groove. When the club head is placed at "address" behind a golf ball, the visual indicators are utilized in a manner to position the club head so that the elongated grooves in the front face lie perpendicular to an intended target line. This prevents the club head from being inadvertently positioned with the front face "open" or "closed".

Abstract: The invention disclosed herein is directed to a golf putter with a ball-striking face that has a plurality of grooves formed therein. In the preferred embodiment, the grooves are equally spaced concentric grooves with a common center that lies along a line parallel to a line passing through the sweet spot of the putter.

Abstract: A golf club head comprising a ball striking face with an insert of polycrystalline diamond (PCD), polycrystalline cubic boron nitride (PCBN), cemented compact, or single diamond crystal is described. Such inserts, because of their hardness and strength, provide for greater distance and accuracy of golf shots as compared to softer materials. These inserts have a mirror-like finish that is resistant to scratches, chips, and deformation.

Abstract: A groove configuration for a putter type golf club head formed of a series of grooves. Each groove has a first surface disposed at an angle no greater than 90 degrees to the ball striking face and a second surface disposed at a lesser angle to the ball striking face. The outermost edges of the groove surfaces intersect in a saw-tooth configuration to provide a gripping area which imparts spin to a golf ball when it is struck by the putter type golf club.

Abstract: An wood-type golf club head having plural cavities formed in a back surface of a head body. A back surface 1A of a metallic head body 1 is formed with plural cavities 5, opposite to a face 4 of the head body 1. The cavities 5 are formed by forging, thus generating even and fine metallic tissues and grain flow. Accordingly, the toughness and durability of the material can be enhanced, so that face 4 can be made thinner to a 1.0 to 3.5 mm thickness for realizing an optional weight distribution. As a result, a larger sweet area can be realized without damaging a strength of head.

Abstract: An iron golf club set comprising a plurality of clubs with varying lofts and groove spacings, in which the groove spacing of each club is equal to or greater than the groove spacing for the next club in the set with less club loft and there are at least two different groove spacings within the set.