Abstract: In a golf putter including a putter head including a head body formed from a metal, and a face insert formed from an elastic material and fixed in a putter face of the head body, the face insert includes a varied thickness portion increased in thickness from a zone adjacent a sweet spot of the head toward circumferential edges of the face insert.

Abstract: A golf club head having a front surface with a substantially planar face, a lower edge and a ball impact area, is constructed with a composite core of metal and plastic, with the core being enclosed in an injection molded plastic sheath. The core may be formed of layers of metal and plastic, or an injection molded plastic having metal particles dispersed therein. The metal to plastic weight ratio is preferably from about 90:10 to about 10:90. For putter heads, the head also includes a resilient section in the front surface having a face flush with the front surface, a lower edge aligned with the front surface lower edge, and an upper edge below the ball initial impact area. An exposed section of the non-resilient core may serve as the initial striking surface, while a front section of the resilient sheath may serve as the second ball striking surface.

Abstract: The present invention relates to a set of golf club irons in which some of the club heads have a hollow space, and some of the club heads do not have a hollow space. The hollow space is preferably defined by a lower portion of the front face, a portion of the sole, and a rear wall. The presence of the hollow space moves the club head center of gravity back (away from the face) and down (toward the sole), making it easier to get a golf ball airborne. The volumes of the hollow spaces generally transition or get progressively smaller with an increase in the club loft angle, thus altering the center of gravity location and moments of inertia by different amounts for different clubs. The hollow spaces may be empty or filled, in whole or part.

Abstract: A golf club head is disclosed that includes a primary element and an insert element formed of different materials. The insert element is located within a cavity formed by the primary element. The cavity is defined by a portion of the primary element that is of unitary construction, and the cavity is positioned between a face and a rear surface of the head. At least a portion of the cavity extends in a direction that is substantially parallel to the first surface. Another aspect of the invention involves a method of manufacturing the golf club head that includes forming the primary element. The cavity is then defined within a portion of the primary element that is of unitary construction, and the insert element is positioned within the cavity.

Abstract: A recess portion is provided on a rear face of a head main body. A resin layer is bonded between ribs, of an innermost face. After an element assembly of the resin layer, an element assembly of the FRP body and a balloon are inserted into the recess portion, the iron golf club head is mounted in a mold, and a gas such as air is supplied into the balloon through an air opening inserted into an opening.

Abstract: A recess portion is formed on a front side of a head body, and a gel is placed in the recess portion. A face member is fixed on the head body so as to seal the gel in the recess portion. Thus, the gel can be certainly provided on the rearward of the face, whereby a hitting force (striking force) can be improved, while a sound generated when hitting a golf ball can be reduced. The sealed gel sticks to the recess portion without forming any space in a condition that it is pressed therein. Thus, the sound generated when hitting a golf ball can be made uniform, ensuring the transmission of a force for hitting a golf ball.

Abstract: A golf putter has a clubhead that includes a ball striking surface defined by a curved concave surface over which a coating material has been applied. The outer surface of the coating material is substantially flat. The coating material is selected according to desired functional characteristics and hardness.

Abstract: A wood-type golf club head (40) having a major body (50), a striking plate insert (55) and a minor body (60) is disclosed herein. The major body (50) is composed of a metal material and has a front wall section (72), a return section (74), a sole section (76), a ribbon section (78) and a ledge portion (80). The minor body (50) is preferably composed of a low density material and has a crown section (62) and a ribbon section (64). The striking plate insert (55) is composed of a metal material. An epoxy-based composition (200) is placed at a face-sole junction (205) to lower the amplitude of the sound of the golf club head (40) during impact with a golf ball.

Abstract: A putter head includes a first half member, a second half member, and an insert. The first half body includes a first metal, and has a face surface on a front face. The second half body includes a second metal, which is higher in specific gravity than the first metal, and is attached to the forward half body. The insert is disposed inside the first half body to be along the face surface and includes one selected from a group consisting of a synthetic resin and a rubber.

Abstract: A golf club head that allows a user to customize the location of the center of gravity. The golf club head comprises a club head having a hollow cavity with a weighting port. The weighting port allows a user to place weighting material inside the hollow cavity, customizing the location of the center of gravity, the swing weight, the total weight, and the balance of the golf club.

Abstract: The present invention is a nickel-tungsten-chromium alloy for an article of manufacture such as a portion of a golf club head (20). The nickel-tungsten-chromium alloy preferably has a density ranging from 9.0 g/cm3 to 10.5 g/cm3, and a Rockwell Hardness ranging from 50 to 92. The nickel-tungsten-chromium alloy is capable of being investment cast to form the article of manufacture.

Abstract: A golf club head comprises a face plate having a back face and a front face forming a club face for hitting a ball; a clubhead main body to which the face plate is attached, the clubhead main body comprising a sole portion and a backside wall portion, the backside wall portion extending upward from the sole portion, leaving a space from said back face; and an insert made of an elastic material and interposed between the back face of the face plate and the backside wall portion.

Abstract: A golf club head includes a hollow body with a heel, a toe, a top, a bottom, a strike plate and a rear portion. A recess is defined at the bottom of the body and extends to the rear portion of the body. A strip is integrated with the body covering the recess. A tab is formed at the rear portion of the body, and has an inlet defined through the tab and in communication with the recess. Vibration-absorbing material is injected into the recess through the inlet. A sealing element is engaged in the inlet to enclose the recess.

Abstract: A golf club iron having a thin front face which is supported by a biasly bent L-shaped insert that is disposed into a rear cavity of the iron to both support the front face and to create a “spring like” effect. The coefficient of restitution of the club head is greater than 0.8. The insert has a lower specific gravity and a higher Young's Modulus than the front face.

Abstract: A golf club iron having a thin front face supported by a biasly bent U-shaped insert that is inserted into a rear cavity and sole recess of the iron to not only support the front face and to create a “spring like” effect, but to create a void between the insert and the front face and sole portion of the club head. The coefficient of restitution of the club head is greater than 0.8. The insert has a lower specific gravity and a higher Young's Modulus than the front face.

Abstract: The present invention relates to a golf club head having multiple undercuts. The club head includes a body defining a striking face, a top line, a sole, and a back, and having a heel and a toe. The back contains a cavity. Multiple undercuts in the form of a plurality of recesses are provided within the cavity. The recesses extend away from the cavity. The recesses may be oriented in a variety of ways. In a first arrangement, the recesses are aligned longitudinally to the striking face in a heel-to-toe direction. In a second arrangement, the recesses are recesses are aligned transverse to the striking face in a front-to-back direction and extend in a heel-to-toe direction. In a third arrangement, the plurality of recesses includes both longitudinally arranged and transversely arranged recesses. An insert, such as a weight insert, a dampening insert, or a combination insert, is preferably positioned within each of the recesses.

Abstract: A golf club head includes a face insert disposed in a cavity formed in the front face of the club head. The face insert has a front surface for impacting a golf ball and a back surface having a cavity formed therein for receiving a second insert. A second insert, composed of a material different from the first insert, is disposed in the cavity formed in the back of the first insert. Because the edges of the second insert are not exposed, the second insert can be made of very soft materials including silicone rubbers and gels, which would not be suitable for use in an application in which the edges are exposed.

Abstract: A golf club head includes a body having a cavity in a rear side thereof, a striking plate provided on a front side of the body, and a vibration-absorbing plate fixed in the cavity of the body and not in contact with the striking plate. The damping effect of the golf club head and gripping comfort are improved.

Abstract: A wood golf club head is adapted to achieve the maximum flight distance or optimum trajectory of a golf ball, by incorporating features to achieve an appropriate correlation between launch angle and backspin speed of a golf ball that is struck by the club head. A wood golf club head is designed to achieve a launch angle and a backspin speed of a golf ball located in an angle-spinspeed region defined by an ellipse having a center point O(21, 1800), length of a major axis L equal to 2100(rpm), length of a minor axis S equal to 5.7(deg), and tilt angle ? of the major axis measured in a counterclockwise direction from the vertical axis equal to 0.25(deg), wherein the horizontal coordinate designates the launch angle(deg) of the golf ball, the vertical coordinate designates the backspin speed(rpm) of the golf ball, and the horizontal and vertical axes have the same numerical scale. Preferably, the wood golf club head has a face formed of a low friction material and a loft angle of 13 to 20 degrees.

Abstract: A golf club head includes a golf club head body, a striking plate mounted to a front side of the golf club head body, and a perimeter wall extending rearward along a perimeter of the golf club head body. At least one hole is defined in a toe of the perimeter wall to reduce the weight of the upper part of the golf club head body, thereby shifting the center of gravity of the golf club head downward toward the heel and thereby increasing the inertial moment of the golf club head.

Abstract: A golf club head includes a body (formed of cast titanium, steel, bronze, or the like) with a cavity formed therein behind a front face. An insert (e.g., an elastomeric insert) is provided through an opening exposed on a surface of the body (e.g., the sole of the club head) such that the insert is substantially encapsulated within the body. The opening or openings may be configured to provide a distinct visual appearance through the use of, for example, one or more rectangular and/or circular shapes. One or more supports and/or baffles may be provided within the cavity for altering the sound and feel of the club head during impact. Furthermore, the elastomeric insert may include a plurality of bubbles configured to alter the mechanical properties of the insert. The club head may be fabricated, for example, through the use machining techniques and/or a powdered metal or investment casting process.

Abstract: A golf club vibration dampening and sound attenuation system including an elongated shaft, a club head, a resilient insert assembly, a dampener, and a grip. The shaft has a distal shaft end and a proximal shaft end. The club head is coupled to the distal shaft end, and includes a front wall and a sole portion. The front wall has a rearwardly sloped front strike side and a rear side. The sole portion rearwardly extends from a lower region of the rear side. The rear side and the sole portion define a cavity and a recess. The recess downwardly extends into the sole portion. A resilient insert assembly is positioned in and substantially fills the recess. The insert assembly is coupled to one or both of the sole portion and the lower region. The dampener is disposed within the shaft and has at least one annular radially extending projection.

Abstract: A golf club iron having a thin front face supported by a biasly bent insert that is inserted into a rear cavity of the iron to both support the front face and to create a “spring like” effect. The coefficient of restitution of the club head is greater than 0.8. The insert has a lower specific gravity and a higher Young's Modulus than the front face.

Abstract: A putter head including a toe portion, a heel portion, a generally vertically extending wall and an insert. The wall has a front strike face, a rear surface, an upper layer, and a lower layer. The upper layer, the lower layer and the rear surface each extend from the heel portion to the toe portion to define a recess rearwardly extending into the wall from the strike face. The rear surface of the wall is formed with variable thickness thereby providing the recess with a variable rearward depth. The insert substantially fills the recess and connects to the wall. The insert has a front surface, a top surface, a bottom surface and a rear surface. The front surface is exposed, while the top and bottom surfaces are substantially covered by the wall.

Abstract: A set of golf club irons with improved vibration damping and weight distribution, each golf club comprising a shaft and a head comprising a body portion having a front portion and a back portion, wherein the body portion defines an upper aperture and a lower aperture extending through the body portion communicating with the front portion and the back portion.

Abstract: A golf club head comprises a hollow body having a cavity, a plurality of rib-like walls provided on the inner surface of the hollow body so as to extend backward from a position near the face portion, and a sound bar disposed behind the face portion so as to extend along the back face of the face portion. A method of making a golf club head comprises making a wax model of the hollow main body having an opening, wherein in order to prevent deformation of the wax model during making a casting mold, the wax model is provided with a brace which extends across the opening and protruding walls which are disposed on the inner surface of the wax model and extend backwards from the opening.

Abstract: An iron type golf club head having a rear surface having upper and lower portions; the upper portion being defined by a blade type iron structure between a top ridge surface and the lower portion; and a lower peripheral weight on the lower portion of the rear surface forming a rear cavity between the bottom sole surface the said upper portion.

Abstract: A golf club head made of a fiber reinforced resin, comprising: a face hitting a ball; a crown forming an upper surface of the head; a sole forming a bottom surface of the head; a side extending between the crown and the sole from an edge on a toe side of the face to an edge on a heel side through a back face; and a hosel into which a shaft is inserted, wherein the crown has a thickness of equal to or less than 2.2 mm, and includes at least partially a high elastic part made of a fiber reinforced resin reinforced by at least one kind of fiber having a tensile elasticity modulus between 380 and 900 (GPa), and the hosel is provided with a vibration absorbent having a loss tangent between 0.7 and 1.5 at a temperature of 10° C. in the vicinity thereof.

Abstract: A golf club head having a cavity back design with a recess therein for placement of a lightweight polymer material. The club head having a back surface of a club face. The polymer material only bonded to the recess by its perimeter with a predetermined void between the polymer and the back surface of the club face. The lightweight material allows for a larger club head and consequently a bigger sweet spot without increasing the overall weight of the club head. Unwanted vibrations caused upon the club head hitting a golf ball are dampened by a spring/mass system. The polymer material serves as the spring and a decorative medallion, which is attached only to the polymer and not the club head, provides the mass. Vibrations created by contact between club head and golf ball are dampened in accordance to material characteristics of the selected polymer.

Abstract: An iron golf club head having a thin (less than 0.12 inches) first section that has an expanded unsupported front face region. The first section including a central portion forming part of a leading edge and wrapping around a sole section of the club, to create an increase the coefficient of restitution of the club head to greater than 0.8. The club head utilizes a rear insert that in addition to providing support for the front face, also allows for the fine tuning of swing weights with no change in geometry or size of the club head. This is accomplished this by the utilization of weight adjustment inserts that impregnate tungsten loaded plastic into sheets of carbon graphite and epoxy. The percentage of tungsten creating a weight range without any size change in the sheets.

Abstract: A golf club head manufacturing method comprises steps of: forming a recession on a rear surface of a striking plate; punching a predetermined specification of a weight to thereby embed it into the recession; punching or welding the striking plate on the golf club head to thereby form a gap between a sole plate of the golf club head and the weight combined with the rear surface of the striking plate; and finishing on a surface of the striking plate and a surface of the golf club head.

Abstract: An impact absorber for a golf club head. The impact absorber for a golf club head in the invention comprises a main body and a chamber. The main body comprises a striking plate, and the chamber is adapted to receive viscous damping liquid. Thereby, the damping liquid can absorb vibration and impact energy of the main body when striking a golf ball.

Abstract: A shock-absorbing golf-club head includes a front recess in the striking face of a golf-club head, extending to the top and the rear portion of the striking face and communicating with a rear recess by means of plural through holes. The front recess is mounted on with a metal face plate having circumferential dented edge to be fixedly engaged with the striking face synchronously when shock-absorbing material is formed into shape and affixed to both front and rear recess so as to form a double-deck shock-absorbing layer to acquire an effect of shock-absorbing, shock-lessening and stability of controlling golf balls.

Abstract: In a putter, at least one adjustable weight is provided which can be moved to different positions longitudinally along the putter head. The putter head is provided with a open channel with closed ends. The weight is slidably mounted within said outer chamber with bolts extending through a slot into a slide within the channel, and the bolt is adapted to be screw tightened into said slide to hold said weight in position. A vibration damping plate is disposed between the weight and the putter head. The front face of the putter is provided parallel vertical grooves defined in the front face, and the grooves are separated by flat lands between The grooves are arcuate in cross section so that the sidewalls of the groove slope is at an angle substantially less that perpendicular to the lands.

Abstract: The present invention discloses a golf putter head with vertical and horizontal cavities.

Abstract: A golf putter head having a visual alignment aid includes a face member and a back body both of which may be selected from a plurality of differently configured face members and back bodies. The face member has a front surface, a top ledge, a rear surface, and a visual alignment aid comprising a rear edge parallel to the front surface. The rear edge is defined by the intersection of the rear surface and the top ledge. The back body comprises a flange portion that extends rearwardly and has an upper surface that is displaced below the top ledge. The face member and back body are selected from materials having contrasting colors so that the rear edge of the face member is contrasted against the background of the back body.

Abstract: A set of golf club irons with improved vibration damping and weight distribution, each golf club comprising a shaft and a head comprising a body portion having a front portion and a back portion, wherein the body portion defines an upper aperture and a lower aperture extending through the body portion communicating with the front portion and the back portion.

Abstract: An iron style golf club head comprising a substantially perimeter weighted club head, including the interposing of three inserts, a striking face insert, a dampening insert and a back insert. The dampening insert, preferably made of a lead alloy, is interposed between the other inserts, and provides for changes in club swing weight while also providing relief for vibration and acoustical variations. The striking face insert is preferably made from a stainless steel alloy and the back inset is preferably made from a carbon graphite. The dampening insert is maneuvered into varied positions to effect a change in the specific gravity of each club head of a golf club set.

Abstract: A golf club head having a cavity back design with a recess therein for placement of a lightweight polymer material. The club head having a back surface of a club face. The polymer material only bonded to the recess by its perimeter with a predetermined void between the polymer and the back surface of the club face. The lightweight material allows for a larger club head and consequently a bigger sweet spot without increasing the overall weight of the club head. Unwanted vibrations caused upon the club head hitting a golf ball are dampened by a spring/mass system. The polymer material serves as the spring and a decorative medallion, which is attached only to the polymer and not the club head, provides the mass. Vibrations created by contact between club head and golf ball are dampened in accordance to material characteristics of the selected polymer.

Abstract: An iron style golf club head comprising a substantially perimeter weighted club head, including the interposing of three inserts, a striking face insert, a dampening insert and a back insert. The dampening insert, preferably made of a lead alloy, is interposed between the other inserts, and provides for changes in club swing weight while also providing relief for vibration and acoustical variations. The striking face insert is preferably made from a stainless steel alloy and the back inset is preferably made from a carbon graphite.

Abstract: A golf club head having a head body, a face plate fixedly attached to the front surface of the head body, a weight fixedly attached to the front surface of the sole portion of the head body, and an elastic body charged into a first recess portion of the golf club head. The elastic body is compressed to stick fast to the rear surface of the face plate. The lower portion of the head body having first and second recess portions is formed as a bulging portion bulging at the rear of the head body. The JIS C hardness of the elastic body is preferably 15-80, more preferably 18-70, most preferably 20-60.

Abstract: A golf putter head has a central indented concave face portion in which a face plate is either directly formed or installed after it is formed. The face plate has a honeycomb structure with three layers formed from a soft polymer material. The outer or top layer has a honeycomb corrugated construction with equally spaced cells and fits into the cavity of the central portion. The second layer which is similar in configuration to the top layer is immediately beneath the outer layer in abutment there against. The third layer which abuts against the surface of the concave face plate is in the form of a plurality of pins which extend through the cells of the other two layers. Toe and heel portions are removably attached to the opposite sides of the head face portion by means of aligning pins and threaded bolts.

Abstract: A golf club with improved vibration damping and weight distribution, the golf club comprising a shaft and a head comprising a body portion having a front portion and a back portion, wherein the body portion defines an upper aperture and a lower aperture extending through the body portion communicating with the front portion and the back portion.

Abstract: A golf club (110) has a head (111) with a curved reflective surface (128) for visually aligning a shot. The club head is counterbalanced above the plane of the ball (120) and has balance weights (116, 118) which may be selected to accommodate the style and preference of the user. The striking surface may be of a different material than the surrounding club head to dampen vibration on the stroke and may be of a material tailored to the user's preference. The other parts of the club may also be composites of several materials to assist in dampening vibration. An alternative aligning structure uses lenticular lens (142, 144, 146) to provide guiding images to the user.

Abstract: A golf club head of the metal wood type is provided, wherein the club head includes at least one and preferably multiple regions of reduced wall thickness. In a preferred form, the regions of reduced wall thickness are formed in the sole plate of the club head. These regions of reduced thickness resonate or vibrate upon club head impact with a golf ball to dissipate energy while also providing a distinctive audible output. As a result, transmission of vibrational energy from the club head to the associated club shaft is significantly reduced.

Abstract: A customizable golf putter head includes a face member and a back body both of which may be selected from a plurality of differently configured face members and back bodies. The face member has a cavity formed in its rear surface, and the back body has a mating section that is positioned within the cavity of the face member so that a parting line between the face member and the back body is concealed below a top ledge of the face member when the putter head is assembled. A hosel selected from a plurality of differently configured hosels is mounted on the face member, and an elastomeric membrane is positioned within the cavity of the face member so as to be interposed between the face member and the back body.

Abstract: A golf club head comprises a face plate having a back face and a front face forming a club face for hitting a ball; a clubhead main body to which the face plate is attached, the clubhead main body comprising a sole portion and a backside wall portion, the backside wall portion extending upward from the sole portion, leaving a space from said back face; and an insert made of an elastic material and interposed between the back face of the face plate and the backside wall portion.

Abstract: A customizable golf putter head includes a face member and a back body both of which may be selected from a plurality of differently configured face members and back bodies. The face member has a cavity formed in its rear surface, and the back body has a mating section that is positioned within the cavity of the face member so that a parting line between the face member and the back body is concealed below a top ledge of the face member when the putter head is assembled. A hosel selected from a plurality of differently configured hosels is mounted on the face member, and an elastomeric membrane is positioned within the cavity of the face member so as to be interposed between the face member and the back body.

Abstract: A selectable insert for a golf club head (e.g., for a golf putter) is configured to produce a predetermined frequency response through the use of, for example, a damped single-degree-of-freedom (SDOF) system. A set of such inserts are provided, and one or more inserts from that set is selected in accordance with the response of an individual, for example, an individual's subjective response to the sound of the insert and/or an individual's biomechanical response to the “feel” or discomfort produced by vibrations propagating through the golf club to the individual.

Abstract: A wood-type golf club having an enlarged club head in the range of 250 to 300 cm.3 constructed of a material lighter than steel to maintain the total club head weight within normal limits including the weight of novel power shaft according to the present invention. The club head, without the power shaft, is approximately 175 gms. and the power shaft weighs approximately 25 gms., so the total club head weight is approximately 200 gms. and within normal limits. The power shaft, integral with the rear of the ball striking face wall at its forward end and integral or cast into the rear of the club head at its rear end, while reinforcing the ball striking face wall, increases the resonant frequency of the face wall to synchronize face wall rebound to the player's swing speed. Face wall resonant frequency is varied by changing the size and weight of the power shaft.