Abstract: A golf club comprises a shaft, a club head, and a connection assembly that allows the shaft to be easily disconnected from the club head. In particular embodiments, the connection assembly includes a removable hosel sleeve that allows a shaft to be supported a desired predetermined orientation relative to the club head. In this manner, the shaft loft and/or lie angle of the club can be adjusted without resorting to traditional bending of the shaft. In another embodiment, the club head has an adjustable sole that can be adjusted upwardly and downwardly relative to the strike face of the club head, which is effective to adjust the face angle of the club head.

Abstract: A method of forming a golf club head includes providing a body having an end portion such as a heel end or a toe end of the club head, wherein the body end portion includes a lower surface and a boss extending therefrom. The method comprises providing a weight having a top surface and a cavity configured to receive the boss, and inserting the boss on the body into the cavity in the weight by rotating the weight about an axis extending normal to the front surface of the body such that the boss interlocks with the cavity and so that at least a portion of the top surface of the weight contacts at least a portion of the lower surface of the body end portion. The weight further includes a protrusion having a concave surface and the body has a corresponding convex surface. Other embodiments are disclosed herein.

Abstract: A golf club attaining good hitting feeling is provided by realizing uniform distribution of grain flows in a face portion. The golf club includes a golf head including a face portion with a ball hitting surface and a neck portion connecting the face portion to a shaft. Grain flows are formed in the golf head, and density of grain flows inside the golf head is made comparable to density of grain flows at a surface layer portion.

Abstract: A golf club that reduces discomfort feeling of a player when he/she hits a ball at a portion other than the sweet spot is provided. The golf club includes a head body including a face body with a ball hitting surface and a neck body connecting the face body to a shaft. The head body includes grain flows extending from the neck body to a toe portion of the face body, and the grain flows are formed in the head body and on a surface of the head body.

Abstract: A wood club head having a loft angle of not less than 13° is provided. The hosel length is not less than 20 mm. The face progression is set to fall within a range of 12 mm to 16 mm (both exclusive). The barycenter depth is set to fall within a range of 20 mm to 25 mm (both exclusive).

Abstract: A method and apparatus for co-curing a multiple material golf club head is disclosed herein. The club head preferably is composed of a metal face component and an aft-body composed of a plurality of plies of pre-preg material.

Abstract: A golf club includes a shaft and a metal head attached to the shaft. The metal head includes a plurality of metal pieces fixed together by means of laser welding. For example, a face member of the head is manufactured by laser welding three metal pieces; i.e., a center metal piece, an intermediate metal piece, and an outer metal piece.

Abstract: A golf club head having a multiple material face is disclosed herein. The golf club head has a coefficient of restitution value greater than 0.83 and a characteristic time value of less than 257 milliseconds. The golf club head is preferably composed of a titanium alloy with a polymer layer disposed over a titanium alloy front wall. A preferred polymer is a polyurethane polymer.

Abstract: A golf club head and a manufacturing method therefor in which the coefficient of restitution can be easily adjusted to desirable values for example the upper limit specified by Golf the Rules without impairing the durability and the directional stability. The head comprises a face member having a ball striking club face, and a main member at the front of which the face member is disposed, wherein the face member is produced from a titanium alloy, and the main member is produced from another titanium alloy having a larger specific gravity than that of the face member's titanium alloy.

Abstract: A golf club (2) includes a head (4), a shaft (6) and a grip (8). At least one siping groove (g1) is provided on a surface of the grip (8). The siping groove (g1) is bent in a direction (Dd) of a depth of the grip. A width (Wg) of the siping groove (g1) is set to be equal to or greater than 0.15 mm and is equal to or smaller than 1.5 mm. It is preferable that an opening edge (e1) of the siping groove (g1) should be bent. The width (Wg) is more preferably equal to or greater than 0.20 mm. The width (Wg) is more preferably equal to or smaller than 1.4 mm and is further preferably equal to or smaller than 1.3 mm. A depth (F1) of the siping groove (g1) is preferably equal to or greater than 0.5 mm and is preferably equal to or smaller than 3.5 mm.

Abstract: Vertical planes equally dividing space between a position of the shaft-hole axis of a head to a rearmost point of the head are defined as first vertical plane S1 to fifth vertical plane S5 starting from a face side. In a view showing a second contour R2 and a fourth contour R4 in overlapping relation, the second contour is defined by an intersection of the second vertical plane S2 and a head outside surface, and the fourth contour is defined by an intersection of the fourth vertical plane and the head outside surface. In this overlap view, toe-1 point t1 to toe-8 point t8are defined on a toe-side line portion of the second contour R2. Toe-side gaps T1 to T8 between the second contour R2 and the fourth contour R4 with respect to the respective points t1 to t8 are defined according to predetermined specifications.

Abstract: Improved golf club heads indicating the location of an optimum hit point on the striking face for maximum shot distance of any hit location on the face (“maximum distance spot”, called MD) and an indication of a second optimum hit point giving best distance, with the condition of minimum or no change of torque caused feel as perceived by the golfer at impact (“best feel spot,” called BF) are disclosed. Methods to locate these optimum locations are described. It has been widely assumed and believed that these two points have the same location. The present inventors have found that this is not true. The principal application is to “wood” type golf clubs designed to hit golf balls from a tee, but can provide useful information for clubs hitting balls from the ground. The indication of MD and BF locations on the club face may take any of various forms.

Abstract: A golf club head structure includes a body portion, a hitting plate portion, and a club body combining portion. The body portion has a first junction surface forming a first hook angle therewith. The hitting plate portion has a hitting surface and a second junction surface with a buffer region spaced there-between. The second junction surface forms a second hook angle with the hitting plate portion, and butts against and attaches to the first junction surface on the same plane. The club body combining portion is provided for combining a club body. Therefore, a joint structure with a junction portion as a plane, capable of not being located on the surface of the club head and spaced by a buffer region with the hitting surface, is formed, which is applicable for solving the combination problem of the junction surface on the same plane that the casting is deformed.

Abstract: A golf club head includes a head body having a grounding face. The grounding face has a front portion and a rear portion. The rear portion of the grounding face is formed with a recessed portion. The recessed portion is provided with at least one protruding boss. Thus, the contact area between the grounding face of the head body and the ground is reduced largely by provision of the recessed portion to reduce the friction and resistance of the grounding face of the head body and to increase the striking force of the head body so as to increase the travel distance of the golf ball and to increase the striking effect of the head body.

Abstract: Embodiments of golf clubs and methods of manufacture are generally described herein. A golf club has a shaft and a body coupled to the shaft. The body has a toe end, a heel end opposite the toe end, a front end, a back, end opposite the front end, a front face at the front end, a top wall, and a bottom wall opposite the top wall. The body also has a body height measured in a first direction substantially normal to the bottom wall as measured from the bottom wall to a top point of the front face. The body also has a center of gravity and a center of gravity height measured in the first direction along a center of gravity line that extends from the bottom wall to the center of gravity. Other embodiments may be described and claimed.

Abstract: Apparatus and a method that enables an assistive energy type golf club to sense the approach of the club face toward a golf ball, and to trigger the release of the assistive energy at the optimum time to achieve the desired golf ball velocity and distance.

Abstract: A golf club head having an insert forming a window through the golf club head is described. The golf club head has upper and lower surfaces. The golf club head includes a body with a heel, a toe, a front portion with a striking face, and a back portion. The front portion of the body forms a striking face. The body includes an aperture extending from the upper surface to the lower surface and extending from the front portion to an inside portion of the back portion. An insert is secured within the aperture. An indicia within the insert is visible from the upper and lower surfaces of the golf club head.

Abstract: A golf putter head assembly comprises: a putter head with a threaded sleeve, and a balance weight screwed into the threaded sleeve. Adjusting the position of the balance weight inside the threaded sleeve can change the center of gravity of the putter head to meet different player's requirements to obtain an optimum hitting stability and ball moving direction, and increase the success rate in sending the golf ball into the hole.

Abstract: A golf club head for an iron includes a back part, a striking plate covering the back part, and a fixing unit to join the striking plate and the back part. The fixing unit has a looped groove provided between the striking plate and the back part, and a welding material interconnecting the striking plate and the back part and filled in the looped groove.

Abstract: A golf club head and associated method for minimizing flex of a golf club striking face upon impact with a golf ball. The golf club head comprises a shell having front and rear portions. The front portion includes an impact segment with a striking face for impacting a golf ball. The golf club head advantageously includes a laterally positioned, light weight, hollow support member within the shell for reinforcing the striking face. The method for minimizing flex and thereby maximizing force transferred from a golf club head to a golf ball includes supporting the striking face with a shell and a laterally positioned, hollow support member within the shell.

Abstract: A golf club head includes a head body and a striking plate. The head body has a front open end, and a limiting rib projecting inwardly from an inner wall face of the head body and proximate to the front open end. The limiting rib has two opposite first rib sections, and two opposite second rib sections interconnecting the first rib sections. Each second rib section has a thickness smaller than that of each first rib section. The striking plate covers the front open end, and abuts against front sides of the first and second rib sections. The striking plate has a sweet spot closer to the first rib sections than the second rib sections.

Abstract: A golf club component, such as a golf club head and/or a golf club shaft, can comprise a golf club component substrate having an outer layer of titanium carbide, typically comprising at least forty percent (40%) carbon content. Alternatively, a golf club component can comprise a golf club component substrate, at least a portion of which is enveloped by a first coating layer of, for example, electroplated nickel, a second coating layer of, for example, electroplated chromium or palladium, and a third coating layer of titanium carbide applied by physical vapor deposition. The titanium carbide layer is durable and can provide the golf club component with a desired aesthetic appearance, such as a black color. Additionally, the golf club component can be coated with a fourth coating layer, such as a layer comprising a sealant or clear coat material.

Abstract: Individual weights and a related kit for adjustably weighting a golf club head are provided, allowing a golfer to fine-tune the club for his or her swing. The kit is useable with a club head that defines a plurality of weight recesses spaced about the club head. The kit includes a plurality of weights, including weights of different mass. Each weight is sized to be threadably received within a recess of the club head. Varying placement of the weights enables a golfer to vary impact conditions in the club head, for optimum distance and accuracy. The kit may further include a tool having an engagement end configured to operatively mate with the fasteners of the weights. The tool preferably includes a torque limiting mechanism configured to inhibit over-tightening of the weights into the recess of the club head. The tool and weights may be provided along with the golf club.

Abstract: Force diversion apparatus, methods and devices including the same result in rotational motion being imparted to an impacting object.

Abstract: A golf club includes a head having a front body preferably made of metallic material and a rear body preferably made of non-metallic material. The front and rear bodies are constructed so that a crown wall on the front body has a protruding section that mates with a recessed section of a crown wall on the rear body. The protruding section of the crown wall on the front body lies in a region of the club head that experiences the highest deflection and stress during impact with a golf ball. Therefore, the club head behaves, during impact with a golf ball, substantially as if the rear body were formed of metallic material rather than non-metallic material.

Abstract: The golf club is adapted for chip shots and has an upright shaft having a top grip and a bottom end; and a club head having (a) a hosel portion, (b) a trapezoidal clubface with a predetermined angle of loft, a longer leading edge and a relatively short trailing edge, (c) a sole plate having a similar profile to the clubface and defining a bounce angle with respect to a horizontal plane normal to the axis of the shaft, and (d) two opposite side walls in the shape of isosceles triangles for connecting the respective sets of opposing side edges of the clubface and sole plate with the apexes of the triangular side walls pointing away from each other. The leading edge of the clubface defines two acute angled points diverging forwardly of the club head to neutralize rough elements of sand, weed and other barriers and reach out to hit a nestled ball back to the fairway.

Abstract: A golf club head is configured for an orientation of the face such that an intended target line is directed along an actual target line for a non-zero lofted club face and a preselected non-zero sole angle selected from sole angles within heel up and toe up orientations of the golf club head.

Abstract: Embodiments of movable weights, such as weight assemblies and weight screws, for a golf club head are disclosed herein. One embodiment for a weight assembly, for example, comprises a mass element having a first end, a second end and a sidewall extending between the first end and the send end. The sidewall of the mass element defines a first bore extending through the mass element and at least a portion of the sidewall of mass element tapers in a direction from the first end to the second end. This embodiment further includes a retaining element configured to engage the first bore adjacent the first end of the mass element and defining a second bore. The weight assembly further includes an elongate fastener having a first end configured to be received within the second bore of the retaining element and a second end extending through the first bore and beyond the second end of the mass element when the mass element, retaining element and fastener are assembled together.

Abstract: A golf club (40) having a club head (42) with a face component (60), an aft body (61), and a sound modifying component (59) is disclosed herein. The face component (60) has a striking plate portion (72) and a return portion (74). The aft-body (61) is composed of a crown portion (62), a sole portion (64) and optionally a ribbon section (90). The face component (60) is composed of a metal material, and the aft-body (61) is composed of a non-metal material such as a composite material or a thermoplastic material. The sound modifying component (59), which is attached to the metallic face component (60), alters the sound of the golf club head (42) when it impacts a golf ball.

Abstract: A golf club head includes a body having at least one assembling opening and at least one cover plate mounted in the at least one assembling opening. A plurality of spaced spot welding points are provided along a joint area between the cover plate and the perimeter wall of the assembling opening. A brazing bonding portion is located between a pair of the spaced spot welding points adjacent to each other. The spot welding points and the brazing bonding portions securely fix the cover plate in the assembling opening to improve the bonding reliability.

Abstract: A golf club head has a main body and at least two side members such as wings. The wings can be configured to be removably coupled to side portions of the main body. The wings can be reconfigured with respect to the main body. For example: the positions of wings relative to the main body can be swapped; the wings can be rotated (e.g., flipped over); and/or one or more wings can be replaced with other wings. The wings can be of varying sizes, shapes, and constructions, including generally symmetrical and generally asymmetrical shapes, and can possess generally homogenous or generally non-homogenous densities. Varying configurations of the main body and wings can allow for a golf club head having varying properties, e.g., shape, size, appearance, weight, and center of gravity.

Abstract: A golf club head includes a hosel in which a brilliant three-dimensional decoration member is fixed to a surface of the hosel.

Abstract: An iron type head body comprises: a material body 13 made from a forgeable metal; and a disparate metallic member 12 made from a metal having nearly equal or smaller specific gravity than the material body 13, and different constituents. By providing the disparate metallic member 12 inside the upper portion of the head body not adjacent to the sole, the head can be lightened. Moreover, by confining the disparate metallic member 12 in the portion upside of the sole 4 not adjacent to the sole 5, the head body 11 can be hypobaric, while the C.G. of the head 2 can be lowered entirely in addition to being lightened.

Abstract: Three moments of inertia M1, M2, and M3 (g·cm 2) about three axes defined in a golf putter are defined in a manner to provide a weight balance satisfying the expressions {(M1?M2)<12000} and {M1>M2>M3}.

Abstract: A more efficient triangular shape for metal wood clubs or driver clubs is disclosed. This triangular shape allows the clubs to have higher rotational moments of inertia in both the vertical and horizontal directions, and a lower center of gravity.

Abstract: A method for surface treating a golf club head, includes: (a) forming a depression unit in the golf club head, the depression unit being indented inwardly from an outer surface of the golf club head, the outer surface being divided into a working area and a non-working area, the depression unit being formed in the working area; (b) filling the depression unit with a shielding material and covering the non-working area with a covering material; and (c) sandblasting the golf club head after step (b) and removing subsequently the shielding material from the depression unit and the covering material from the non-working area so as to form the working area into sandblasted and non-sandblasted regions that differ in gloss intensity.

Abstract: A customized golf club comprising a shaft, a club head body, and a pre-printed, colored, or functional protective wrap applied to the shaft or club head body. A method of customizing golf clubs by applying mass, graphics, logos, decals, or colors to the body or the club head or the shaft by shrink-wrapping or adhering a protective wrap to a portion of the club.

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

Abstract: An exemplary golf club head having an increased amount of discretionary mass may be realized by utilizing improved drop angles, an improved average crown height, and/or articulation points. The discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. A preferred break length may also be utilized to further improve the depth of the center of gravity. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.

Abstract: A golf club comprises a club shaft having a tip end and a butt end, a golf club head being attached to the tip end of the club shaft, and a golf grip being attached to a region of the club shaft extending from the butt end toward the tip end of the club shaft, the golf grip having an upper end by the side of the butt end of said club shaft, wherein the golf club has a club entire length in the range of from 46 to 48 inch, the golf club has a swing weight of from C5 to D0 based on 14-inch balance method, and the golf club has a moment of inertia in the range of from 2850 to 3000 kg·cm2 at the position of the upper end of the golf grip.

Abstract: The present invention provides a golf club head that can hit a ball with a sufficiently large amount of backspin. The golf club head according to the present invention is an iron type golf club head made of a metal and including a flat face. A plurality of traces are formed by milling on the face. The pitch of the traces is between 0.1 mm and 1 mm.

Abstract: A method of making a golf club head, which the golf club includes a plurality of components, includes the steps of: coating a brazing solder on the components, then heating the components for solidification of the brazing solder to form a metal skin layer on each component, then bonding the components together by brazing.

Abstract: Wood-type golf clubs and/or golf club heads include a club head body having a breadth to length ratio of at least 0.9, optionally a club head volume of at least 450 cubic centimeters, and a diagonal dimension of at least 75% of a theoretical maximum diagonal dimension (as measured along a diagonal of a bounding box enclosing the club head body and defined by the length dimension and the breadth dimension). In some examples, the diagonal dimension may be at least 80%, 85%, or even 90% of the theoretical maximum diagonal dimension. Additionally or alternatively, if desired, at least one horizontal cross section of the club head body will enclose or encompass an area of at least 0.8×BL, at least 0.85×BL, at least 0.9×BL, or even at least 0.95×BL.

Abstract: A method of manufacturing a golf club head having a face insert that is mechanically isolated from the body of the club head involves inserting a face insert into a cavity formed in the body. The face insert is suspended above a bottom wall of the cavity by tabs that rest on the front face of the body. A curable liquid material, such as polyurethane, is injected between the face insert and the cavity. Once the polyurethane is cured, the tabs are machined off leaving a striking surface on the face insert that is flush with the front face of the body. Since the only part of the face insert that was in contact with the body is removed during the machining operation, the face insert is completely isolated from the body by the cured polyurethane.

Abstract: The present invention is directed towards a golf club head having integrally incorporated twisted face angles which are selected to match a particular golfer's swing speed. The twisted profile front face is defined by a first horizontal plane through the center of the face and having a first tangent at an intersection between the first horizontal plane and a center vertical plane and a second horizontal plane located between the first horizontal plane and a top line, wherein the second horizontal plane has a second tangent at an intersection between the second horizontal plane and the center vertical plane that is an angle to the first tangent. The invention further includes a third horizontal plane located between the first horizontal plane and a bottom line, wherein the third horizontal plane has a third tangent at an intersection between the third horizontal plane and the center vertical plane that is an angle to the first tangent. Both tangents are between 0.05° and 2.

Abstract: A golf club head and method for making the same, which is characterized in that: a surface of the golf club head comprises a base layer made of non-ferrous metal of aluminum, or magnesium, or titanium, or an alloy base layer of those three metals and a protection layer after the surface of the golf club head is processed, and the thickness of the protection layer is 10-100 ?m. The protection layer is a ceramic layer formed by plasma micro-arc oxidation and has the properties of abrasion-resistant and corrosion-resistant. The technique is simple, and the production cycle is short, Thereby, the production efficiency is improved.

Abstract: The present invention relates to a golf head and a welding method thereof. In the welding method of the invention, a metal plate is disposed in an opening of a metal body, wherein the shape of the metal plate matches that of the opening. Subsequently, a first electrode and a second electrode contact a back surface of the metal body and a top surface of the metal plate respectively, wherein the shapes of the first electrode and the second electrode match those of the back surface and the top surface respectively. Finally, the first electrode and the second electrode output a current so as to weld the metal body and the metal plate by a resistance welding process. By utilizing the welding method, the welding speed can be significantly increased so as to increase the yield, and the welded joint can be stronger. Furthermore, the welded golf head has a high flatness so that the following manufacturing cost can be decreased.

Abstract: Disclosed is a golf club head including a faceplate portion and a main body constituting a remaining part of the scented golf club head. An insert capable of emitting fragrance over a predetermined period of time is provided within a cavity or an opening formed in the main body.

Abstract: A method for fitting a golf club head to a golfer is disclosed herein. The method includes determining an optimized face angle for a golfer. The golf club (40) has a club head (42) with a face component (60), an aft body (61) and a gasket (300). The face component (60) has a striking plate portion (72) and a return portion (74). The aft-body (61) is preferably composed of a crown portion (62), a sole portion (64) and optionally a ribbon section (90). The gasket (300) controls the face angle of the club head (42). The width of the gasket (300) varies to provide an open face angle club head, a closed face angle club head, or a neutral face angle club head (42).

Abstract: An adjustable golf club incorporates instructions into the golf club, and more particularly, in connection with the club head. More specifically, encoded information is visibly provided on the club head, the encoded information relating to the performance of the club head. In addition to the encoded information, a decoder or device for interpreting the encoded performance information is also provided on the club head. The encoded information, in conjunction with the decoder for interpreting the encoded performance information, allows the golfer to easily adjust his or her club head based on the playing conditions or his or her swing. Typically, the encoded information relates to a weight of the club head, and may be used to adjustably vary the weight of the club head. A method of configuring a putter type golf club head adaptable to a plurality of configurations is described as well as a kit for selectively configuring components of a golf club head.