Abstract: A method of forming patterns, trademarks and balance weight in a golf club head includes fabricating a rough working piece of the club head which has a trough located at a lower portion and reverse recesses for selected patterns and trademarks located at an upper portion thereof. Then fill and stuff the trough and recesses with a metallic material different from the club head that has a lower melting point (such as copper powder). Thereafter the stuffed recesses and trough and rough working piece of the club head are heated until the stuffed metallic material melted to form a strong binding with the rough working piece. Then grinding the rear side of the stuffed patterns and trademarks to expose the patterns and trademarks. The stuffed material in the trough becomes a balance weight. Finally to engage a hitting plate with a front circumferential edge of the trough to form a finished club head.

Abstract: An improved golf driver club head wherein each driver club head has a tensioning device, which places the peripheral/outer structure of the club head in compression; thereby, resulting in a stronger, more rigid club head structure. In the preferred embodiment, the tensioning device comprises an elongated cylindrical member having respective end members. The top and bottom surfaces of the golf club head are each provided with a cylindrical depression or recess and an aperture or passage at the lower end of the depression. The passages are just large enough to accommodate the tensioning device, but are too small to pass the respective end members. During club head manufacture, the length of the device is selected to apply a compressive force between the head surfaces. Fine adjustment is accommodated by a threaded end member. The actual compression force may be selected to yield the best performance depending on the geometry, structure and material of the club head.

Abstract: A golf club with a gripping section at one end and a club head having a heel portion and a toe portion, attached to the shaft at the other end wherein said shaft centerline and a plane parallel to the ground and tangent to said heel form a lie angle when said club head is at rest and positioned to strike said golf ball; a club head whose mass distribution is concentrated at said toe and heel; a club face on said club head operable for striking a golf ball and spanning the area between said heel and said toe of said club head and having a heel to toe and sole to the top of club head bulge defined by a radius whose center is offset toward said heel and whose arc is swept from heel to toe of said club face; a lie angle configured to maintain the impact point of said golf ball on said club face when said impact point is off the center of mass.

Abstract: A golf club head which comprises a steel alloy which contains maximum amounts of 0.03% of C by weight, 0.2˜0.6% of Si by weight, maximum amounts of 0.15% of Mn by weight, maximum amounts of 0.03% of P by weight, maximum amounts of 0.03% of S by weight, 10.5-13.5% of Cr by weight, 0.8-1.4% of Mo by weight, 0.8-1.4% of Al by weight, 0.8˜1.4% of Ni by weight, 0.02˜0.1% of Nb by weight, maximum amounts of 0.01% of N by weight, maximum amounts of 0.03% of Cu by weight, and the rest being Fe. The steel alloy is made by a metallurgical method involving vacuum melting process and normalizing process, whereby the main crystal structure of the steel alloy is Fe.

Abstract: A golf club head comprises a basal body having a metallic surface, and a multilayer coating on the metallic surface, wherein the multilayer coating comprises a clear first layer on the metallic surface and a colored clear second layer on the clear first layer, and the basal body is visible through the multilayer coating. Preferably, the basal body has a mirror finish surface, satin finish surface, orange peel finish surface or the like under the multilayer coating. The multilayer coating further comprises an iridescent layer on the colored clear layer, wherein the iridescent layer includes iridescent material which is dispersed therein maintaining a certain degree of transparence.

Abstract: A golf club of the putter type, with a club head (11) with at the outset a level, vertical or largely vertically positioned strike area (19). The strike area (19) is arranged as a long-shaped, lengthways extended interchangeable/replaceable tension bar (15), which is clamped to two fastening clamps at the opposite ends of the club head (11) by means of the two opposite end parts (18a and 18b) of the lengthways extended interchangeable/replaceable tension bar. The lengthways extended interchangeable/replaceable part has, in an area between the two opposite end parts (18a and 18b), a main part (15a) which extends freely over a hollow (11e) in the club head (11).

Abstract: A golf club with an enhanced degree of freedom with respect to design, and a method for manufacturing the same. A head 1 is formed with a face 3 on a front face, a cavity 9 on a rear face and a shaft attachment portion 8 on one side, to which is connected a shaft 2. If a maximum height of a bottom surface 9A of the cavity 9 in the top-to-sole direction is denoted by H1, and a maximum width thereof in the toe-to-heel direction is denoted by W1, the cavity 9 is formed to satisfy an inequality: H1/W1≧0.6. Further, if a maximum height of the face 3 is denoted by H2, then the cavity 9 is formed to satisfy an inequality: 0.7≦H1/H2≦0.85. Thus, the face 3 can be easily resiliently bent at the time of striking balls, thereby developing a greater repulsive force, elongating travelling distances of balls.

Abstract: A device for determining a neutral point on a golf club head. The device comprises a base. A calibration block is attached to the base. The calibration block comprises an index dial and the index dial comprises a neutral indicator. A head aligner is rotatably attached to the base opposite to the calibration block. The head aligner comprises a groove aligner and a sole plate. When the sole plate is in contact with a club sole of the golf club head and the groove aligner is aligned with a club groove of the golf club head the neutral point is aligned with the neutral indicator.

Abstract: A method of manufacturing a golf club head by which face lines, a club number display and logo marks can be formed without being affected by the configuration and material of the club head. Face lines 10, a club number display 11 and logo marks 12 and 13 are formed on the surface of a golf club head 1, using a laser beam processing machine. Stamps and receiving dies are no longer required for a respective production lot number or a respective club number, so that costs and time required for fabricating impressing stamp dies and receiving dies can be saved. Further, face lines 10, club number display 11 and logo marks 12 and 13 are able to be formed without being affected by the configuration and material of the golf club head 1.

Abstract: A golf club head with a polymer insert having indicia printed directly on its surface is disclosed herein. The polymer insert is disposed in a recess of the club head, and is preferably composed of a thermosetting material. Preferably, an UV curable ink is utilized for the indicia. The UV ink is printed on the external surface of the insert through a transfer pad printing process, and then cured with UV energy. Preferably, the golf club head is a putter, and the insert is composed of a thermosetting polyurethane. The insert is preferably white, and the indicia is preferably multi-colored.

Abstract: A manufacturing method for a golfing iron club and an iron golf club manufactured by the method. A shaft is connected to a head 1 having a face 3 on a front and a shaft attachment portion on one side. After a pre-forging stage using an upper die and a lower die, a rear region corresponding section 9′A and a lower peripheral face corresponding section 11A are machined with an end mill A. Then post-forging is performed using an upper die and a lower die to form the head 1. Thereafter, post-machining is performed using an end mill B. Thus, a rear region 9A and a lower peripheral face 11 can be formed without forging. Machining can be carried out between the pre-forging and post-forging stages, so that locations which are difficult to forge can be accurately formed. In addition, the head 1 is able to be formed more freely, owing to a post-machining stage.

Abstract: A golf club head comprises a ball-hitting face made of a steel alloy containing maximum amounts of 0.03% of C by weight, 0.2% of Si by weight, 0.2% of Mn by weight, 0.2% of P by weight, 0.02% of S by weight, 10.5-11.0% of Cr by weight, 1.8-2.2% of Mo by weight, 9.5-10.5% of Ni by weight, 0.9-1.2% of Ti by weight, 0.5% of Al by weight, 0.1% of Cu by weight, 0.3% of Nb by weight, 0.3% of B by weight, 0.01% of N by weight, 0.1% of V by weight, 0.1% of W by weight, and the rest being Fe. The steel alloy is made by a metallurgical method involving two vacuum melting processes. The texture of the steel alloy is mainly formed of martensite.

Abstract: A manufacturing method for a golf club head is disclosed. The golf club head is composed of a body and a reinforced plate secured to the body at a sweet spot of the golf club head. The reinforced plate is embedded in the body by friction welding. Whereby, the reinforced plate is securely integrated with the body and the head has a long term of use life.

Abstract: A golf club head comprises a metallic basal body and a multilayer coating thereon, the multilayer coating comprises a foundation coat of a priming paint, a color coat of a coloring paint, an iridescent coat of an iridescent paint and a clear coat of a transparent and colorless paint, the iridescent paint contains a resin, a colorant and an iridescent material, the iridescent material is at least one kind of flakes selected from the group consisting of colored aluminum flakes, metal flakes whose surface is resin-treated, mica flakes coated with a titanium oxide, and flakes of mica itself, the iridescent coat has a thickness of from 10 to 40 microns, and the overall thickness of the multilayer coating is not more than 100 microns.

Abstract: A material having capacity of absorbing vibration contains maximum amounts of 0.03% of C by weight, 0.2˜0.6% of Si by weight, maximum amounts of 0.15% of Mn by weight, maximum amounts of 0.03% of P by weight, maximum amounts of 0.03% of S by weight, 10.5˜13.5% of Cr by weight, 0.8-1.4% of Mo by weight, 0.8-1.4% of Al by weight, 0.8˜1.4% of Ni by weight, 0.02˜0.1% of Nb by weight, maximum amounts of 0.01% of N by weight, maximum amounts of 0.03% of Cu by weight, and the rest being Fe. The material being made by a metallurgical method involving vacuum melting process and normalizing process, whereby the main crystal structure of the material is Fe.

Abstract: A golf club head, which a steel alloy. The steel alloy contains maximum amounts of 0.03% of C by weight, 0.2˜0.6% of Si by weight, maximum amounts of 0.15% of Mn by weight, maximum amounts of 0.03% of P by weight, maximum amounts of 0.03% of S by weight, 10.5˜13.5% of Cr by weight, 0.8-1.4% of Mo by weight, 0.8-1.4% of Al by weight, 0.8˜1.4% of Ni by weight, 0.02˜0.1% of Nb by weight, maximum amounts of 0.01% of N by weight, maximum amounts of 0.03% of Cu by weight, and the rest being Fe. The steel alloy being made by a metallurgical method involving vacuum melting process and normalizing process, whereby the main crystal structure of the steel alloy is Fe.

Abstract: A golf club which has a clubface of desired shape comprising an alloy metal is provided. The golf club has excellent strength properties as well as excellent ball hitting properties. The clubface is free from casting defects such as cold shuts, and preferably, free from the crystalline phase formed from crystal nuclei through nonuniform nucleation since the club face is produced in a simple, highly reproducible, one-step process by selectively cooling the molten metal at a temperature above the melting point at a rate higher than the critical cooling rate, and the product comprises a single amorphous phase.

Abstract: A method of making an article having a high moment of inertia and the article thus produced which method involves rotating a mold around a central axis, inserting higher density materials into said mold which will be centrifugally forced to the opposite ends of the mold. Then inserting a liquid which is less dense and which will fill the mold and after having infiltrated and attached to the first material that has been placed therein, will harden into solid form.

Abstract: Disclosed is a golf club head in which a mass-adjusting weight is inserted into the inside of a cylindrical hosel portion, wherein a flange that can be deformed in a radial direction of the hosel portion is formed in a peripheral portion of the foregoing weight and the diameter of the flange is increased so as to fix the foregoing weight to the foregoing hosel portion.

Abstract: The present invention is a golf club (30) having a club head main body (34) with a recess (38), an polymer insert (40) in the recess (38), an isolation layer (52) and a weight body (50). The polymer insert (40) is composed of a thermosetting polyurethane material having a Shore D hardness in the range of 42 to 55, and a Bayshore rebound in the range of 51 to 60. The preferred thermosetting polyurethane material is formed from a p-phenylene diisocyanate prepolymer and a curing agent. The golf club (30) is preferably a putter, however, it may be a wood or an iron. The particular thermosetting polyurethane provides a soft striking face for feel and a good rebound for distance. The weight body (50) is preferably composed of a tungsten alloy, and the isolation layer (52) is preferably composed of a thermoplastic polyurethane.

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 has a four-faceted sole. The golf club head has a body that has a volume between 140 cubic centimeters and 350 cubic centimeters. The body of the golf club head weighs between 140 grams and 215 grams. The golf club head preferably has a bismuth weighting system. The golf club head is preferably a driver, but may also be a fairway wood. The four-faceted sole is composed of a central facet, a toe facet, a heel facet and a rear facet.

Abstract: A golf club head comprises a ball-hitting face made of a steel alloy containing maximum amounts of 0.03% of C by weight, 0.2% of Si by weight, 0.2% of Mn by weight, 0.2% of P by weight, 0.02% of S by weight, 10.5-11.0% of Cr by weight, 1.8-2.2% of Mo by weight, 9.5-10.5% of Ni by weight, 0.9-1.2% of Ti by weight, 0.5% of Al by weight, 0.1% of Cu by weight, 0.3% of Nb by weight, 0.3% of B by weight, 0.01% of N by weight, 0.1% of V by weight, 0.1% of W by weight, and the rest being Fe. The steel alloy is made by a metallurgical method involving two vacuum melting processes. The texture of the steel alloy is mainly formed of martensite.

Abstract: An iron golf club comprises a shaft, a grip fastened with one end of the shaft, and a head fastened with other end of the shaft. The head has a head angle ranging between 10 and 60 degrees. The shaft has a shaft angle ranging between 65 and 90 degrees. The head has a center of gravity, which is located at the center of a sole of the head.

Abstract: A golf club, such as a sand wedge 20, is formed with a head 26 having a front face 42 and a centrally located ball-impact surface 44 having a width greater than either of two passages 46 and 50 formed in the front face on each side of the ball-impact surface. A hood 72 is formed in cantilever on the head 26 and extends from an edge of the front face 42 adjacent the ball-impact surface 44 and the passages 46 and 50. A mark 80 is formed on a portion of the hood 72 and is aligned with the ball-impact surface 44, and is visible by a golfer when using the sand wedge 20. A mass 78 is formed in the head 26 to the rear of the ball-impact surface 44 on a rear face 54 of the head 26.

Abstract: A contoured golf club face provides increased structural integrity for a given weight and size is described and shown along with a method for its design. The contoured golf club face includes a vertical stiffening region, a tapered horizontal stiffening region, four similar contoured quadrants of increasingly thinning material toward the center of each quadrant, and thickening regions at face/sole and face/crown intersection regions. The thicknesses of adjoining regions are gradually blended to provide a smooth contoured surface. The present golf club face is light weight, is structurally resistant to impact deformation, is resistant to initial and long-term failure, has its mass center located at its sweet spot, exhibits inertial axes which are aligned with vertical and horizontal axes (i.e. primary club force directions: ball impact force and club centrifugal force directions), and produces acoustical tones.

Abstract: A golf club head is formed of a metal shell, a metal neck tube, and a metal ball-hitting plate. The shell is provided with a neck seat having a through hole in communication with the hollow interior of the shell. The neck tube is lodged in the through hole of the neck seat such that the outer end of the neck tube forms with the neck seat a neck portion of the golf club head. The shell is further provided on the outer surface with an open space corresponding in shape to the ball-hitting plate. The ball-hitting plate is fused with the shell by brazing such that the ball-hitting plate covers the open space of the shell. The shell is made by casting. The neck tube is made by a mechanical process. The ball-hitting plate is made by forging, or punching and pressing.

Abstract: An aluminum alloy product of extremely high hardness is conformable for use in the manufacture of various products, such as, golf clubs and pump partshaving a body or first layer of an aluminum alloy treated by successive precipitation hardening and reverse quenching to produce a hardness exceeding 140 HBN, and an outer alumina layer or surface coating is applied by hard-anodizing to a predetermined thickness on the first layer and being of even greater hardness than the first layer.

Abstract: A compliant golf club head permits a more efficient impact between a golf ball and the golf club head. Material and geometry constraints of a striking plate of the golf club head can reduce energy losses caused by large strain and strain rate values of the golf ball, these constraints on the striking plate yield a measure of the impact efficiency of the golf club head. Designating a required natural frequency range of the striking plate provides improved impact efficiency between the golf ball the golf club head.

Abstract: A golf club having a club head with a striking plate composed of a composite material and having a thickness in the range of 0.010 to 0.250 inches is disclosed herein. The golf club head also has a coefficient of restitution greater than 0.8 under test conditions such as the USGA test conditions specified pursuant to Rule 4-1e, Appendix II, of the Rules of Golf for 1998-1999. The golf club head body is also composed of a composite material, and a weight strip is placed within a ribbon of the body.

Abstract: A golf club head comprises a rear seat member and a front member fastened to the rear seat member by soldering. The two members are made of a metal material. The rear seat member has a base similar in shape to the back of the golf club head. The base has one side which is connected with a neck. The front member has a plate which is provided in the front lace with a ball-hitting face. The plate is provided in the edge with an extension portion extending therefrom such that the rear edge of the extension portion is fastened with the front side of the base of the rear seat member by soldering. A flexure space is provided between the back of the plate and the rear seat member to facilitate the flexing of the plate.

Abstract: A composite golf club head having a club having a striking plate portion with a texture coating is disclosed herein. The golf club head has a crown component composed of a plurality of plies of pre-preg material and a sole component composed of a plurality of plies of pre-preg material. The texture coating is composed of a plurality of polymer resin particles, a medium and a coupling agent. The polymer resin particles are preferably composed of a polyethylene or polypropylene material. The texture coating provides added durability to the composite striking plate portion.

Abstract: A golf club head has a weight compartment within a hollow interior, and a weight member that is injected into the weight compartment subsequent to formation of the body of the golf club head. The preferred weight member is bismuth. The golf club head has a body that has a volume between 140 cubic centimeters and 350 cubic centimeters. The body of the golf club head weighs between 140 grams and 215 grams.

Abstract: The present invention is directed varying the thickness of a striking plate of a golf club head according to the loft angle of the golf club head. The thickness of the striking plate is greater for lower loft angles, such as seven, eight and nine degrees loft angle drivers, as compared to ten, eleven and twelve degrees loft angle drivers. The striking plate may have a variable face thickness with the thickest region near the center.

Abstract: A golf putter head is characterized by one or more axis of symmetry, formed by an extrusion process. The extrusion has provisions for multiple styles, masses, lofts, lies, and colors, of golf club heads to be made from the same extrusion process and from the same extruded bar. Golf putter embodiments have provisions for differing head balances, including center, toe, and face balance in two faced, cavity back, or rounded back styles without changes to the extrusion process. The width of the putter may be altered for different total mass of the putter as desired. A novel method of securing mass and inertial altering material inserts is demonstrated with the use of wall tapered cavities which securely lock the insert material without the use of pins, screws, threads, or glues. Novel use of materials which expand upon cooling are introduce for these insert.

Abstract: A golf club having a ball-contacting surface formed by a very thin layer of lubricant for reducing the spin imparted to a golf ball. By maintaining the thickness of lubricant exposed at the ball-contacting surface to be less than 20 microns, the integrity of the lubricant layer is improved and the mechanical locking effect between the soft lubricant and the golf ball is minimized. The thin lubricating layer may be supported by a reinforcing structure to convey the force of the golf ball impact to the club head without indentation of the thin lubricating layer.

Abstract: Golf shots lose both distance and directional accuracy when the ball is struck at a clubface location not aligned with (i.e. directly in front of) the clubhead center of gravity (a “mishit”). High moment of inertia clubhead designs (i.e., extreme toe heel weighting) only partially reduce mishit distance loss and are limited by practical clubhead size and weight. The subject invention reduces, or totally eliminates mishit distance loss regardless of clubhead moment of inertia via designs which absorb more ball impact energy for on-center hits versus mishits thus equalizing distance. The invention allows for the use of integral or attached metal or plastic faceplates without impeding the function of such variable energy absorbing mishit corrective devices, thereby greatly improving clubhead durability, feel, and practicality, especially for irons and putters.

Abstract: The golf club of the present invention is comprised of an elongated shaft and a club head, where the club head further includes a striking face, a front toe region, a rear heel region, and opposing top and bottom edges. The elongated shaft is coupled to a hosel. Between the hosel and face there is defined a juncture region. The club also includes a small cavity, filled with a non-metallic material, which is located in the juncture region. In addition to enlarging the sweet spot of the club, the filled cavity serves to dampen or eliminate vibrations that are established in the club body as the striking face contacts a ball during the course of a typical golf swing.

Abstract: A method of manufacturing a curved metal plate includes pressing a metal plate made of a plate material selected from titanium or titanium alloy with a die segment that forms thereon a convex surface curving in at least one direction and at least one recess, with a first side of the metal plate in contact with the convex surface, thereby curving the metal plate along the convex surface while allowing a part of the plate material on the first side of the metal plate to intrude into the at least one recess under pressure, thus forming at least one rib on the first side of the metal plate.

Abstract: A receptacle for personal items, such as car keys, coins, etc., or refuse, such as cigarette and cigar butts, comprises a body having a shape of a golf club head with a cavity and an opening to the cavity; and a cover disposed at the opening to gain access to the cavity.

Abstract: A method for making a blade putter having a high inertia of rotation. The product of the method has a base, a ball-striking part, a toe weight and a heel weight. The base is made of a first material of relatively low mass, such as aluminum, and the other parts are made of a second material having a relatively high mass, such as copper or brass. A dovetailed groove is formed in the toe end of the base to slidingly receive a dovetailed protuberance formed in the toe weight and a dovetailed groove is formed in the heel end of the base to slidingly receive a dovetailed protuberance formed in the heel weight. A recess formed in a leading wall of the base receives the ball-striking part. Fasteners hold the parts together as they are machined so that respective perimeters of the weights are flush with the base. The fasteners are then removed and the base is anodized separately from the other parts.

Abstract: The invention relates to a golf club with a striking surface for striking golf balls. The golf club has a coating applied by a thermal spray method at least in the area of the striking surface. The club coatings are preferably applied by a high-speed flame spray method or by a cold gas spray method. For coating golf clubs by hot spraying, in particular metals, metal alloys, oxides, (especially Al2O3 and/or TiO2), carbides, borides, plastics, or mixtures of the above substances can be used as the spray materials.

Abstract: Lasers are useful for many types of materials processing, including annealing, texturing, and joining. A method is provided for modifying the surface finish and structure of any material, with said materials being used in the construction of golf clubs. The surface modified materials have properties that lead to increased performance of the golf clubs. A secondary benefit is an improved material structure leading to a better feel for the golfer.

Abstract: A weighting device for a golf club head is disclosed herein. The weighting device has a polymer body with a plurality of ports for holding a plurality of high density members. The high density members are preferably tungsten spheres. The weight of the weighting device may be adjusted by increasing or decreasing the number of high density members. The weighting device is preferably removable from a golf club head to allow for adjustment in the golf club head's center of gravity, moment of inertia and swingweight.

Abstract: A golf club having an interior hosel that is disposed inward from a striking plate to allow for compliance of the striking plate during impact with a golf ball. The present invention also includes a method for producing the golf club in which the interior hosel is attached to a lateral extension of a face member. The lateral extension is connected to the striking plate. The striking plate is preferably composed of a forged titanium material.

Abstract: A golf club, such as a driver, includes a head designed for reducing spin imparted to a golf ball struck by the club head. The club head has a face portion for contacting a golf ball that is formed of a relatively hard material having a generally slippery characteristic. The golf ball slips on the face portion when a plane of the face portion at a point of contact between the ball and face portion is not generally normal to a direction of travel of the club head. The slippery characteristic may be obtained by forming the face of the club head from a sintered material impregnated with a lubricant such as PTFE. The club head may also include a plastic insert with a self-lubricating filler.

Abstract: A golf club head which can be reduced in its thickness with no fear of impairing the durability and strength of the club head. A face portion of the golf club head is configured such that the vertical dimension of the face portion is smaller than the horizontal dimension thereof, and the face portion is arranged so as to satisfy any of the following conditions: 1) the longitudinal direction of crystal grains of a material of the face portion is oriented in the vertical direction of the face portion; 2) the direction in which the material exhibits a large ductile amount at the time of breaking is oriented in said vertical direction; and 3) the direction in which the material exhibits a large ratio of ductility per unit length is oriented in said vertical direction.

Abstract: Disclosed is a golf club head in which a mass-adjusting weight is inserted into the inside of a cylindrical hosel portion, wherein a flange that can be deformed in a radial direction of the hosel portion is formed in a peripheral portion of the foregoing weight and the diameter of the flange is increased so as to fix the foregoing weight to the foregoing hosel portion.

Abstract: A golf club head that includes a hosel and a metal blade. The metal blade includes a knife-like leading edge at the juncture of the sole and striking face, a sole with a rounded protrusion, and a rear face that extends from the sole's protrusion to the trailing edge of the striking face. The knife-like leading edge allows the club head to easily cut through high grass behind the golf ball, thus prohibiting the grass form turning or twisting the club head. The rounded protrusion of the sole prevents the head from cutting too deeply into the ground surface.

Abstract: A golf club head having a face section with a polymer surface can provide a more efficient impact between a golf ball and the golf club head. By utilizing a polymer surface with desired material properties of stress, strain and damping levels, the face section will incur higher strain and strain rate levels than the golf ball. These lower internal stresses within the golf ball yield a more efficient impact with a golf club head.