GOLF CLUBHEAD AND GOLF CLUB

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001]The present application claims priority to Chinese Application CN 202420179101.9 filed Jan. 24, 2024. The disclosure of the application is incorporated herein for all purposes by reference in its entirety.

FIELD OF THE INVENTION

[0002]The present invention generally relates to golf clubheads and golf clubs.

BACKGROUND

[0003]The center of gravity (CG) of a golf clubhead is incredibly important when it comes to performance and feel because the CG location on a golf clubhead can influence launch, spin, feel, sound, forgiveness, how a shaft performs in conjunction with the clubhead, and more. Generally speaking, CG Forward (location of the CG toward the face) will lower launch and spin, and generally make the club play a bit less forgiving. CG Back (away from the face) will increase launch and spin, and generally make the club play more forgiving. CG High (toward the top of the clubhead) will cause the ball to launch lower and spin more. CG Low (toward the bottom of the clubhead) will cause the ball to launch higher and spin less. Any minute changes in the CG location can have a drastic effect on performance.

[0004]To position the CG at a desired location, many existing iron-type golf clubheads are configured with hollow structures (e.g., cavities, channels) to alter wight distribution. While implementation of a hollow structure changes the CG location, it also reduces the strength of the face of the golf clubhead. As a result, the face of the golf clubhead is prone to deformation upon impact, affecting the performance (e.g., the direction of the ball, the energy output) and feel.

[0005]Given the current state of the art, there remains a need for golf clubheads and golf clubs that address the abovementioned issues.

[0006]The information disclosed in this Background section is provided for an understanding of the general background of the invention and is not an acknowledgement or suggestion that this information forms part of the prior art already known to a person skilled in the art.

SUMMARY OF THE INVENTION

[0007]The present disclosure addresses the abovementioned and/or other issues by providing golf clubheads having centers of gravity strategically positioned at desired positions and faces with enhanced strength.

[0008]In various exemplary embodiments, the present disclosure provides a golf clubhead including a body, a hosel and a center of gravity (CG). The body includes a face, a back, a top, a sole, a heel and a toe. The face is at a front side of the body and includes a striking surface for striking a ball. The back is at a rear side of the body. The top is at an upper side of the body. The sole is at a lower side of the body and thicker than the top in a thickness direction of the body. The sole includes a bottom surface for contacting a playing surface when the golf clubhead is in use. The heel is at a right side of the body. The toe is at a left side of the body and wider than the heel in a width direction of the body. The hosel is coupled with the heel of the body and configured for connecting the golf clubhead with a shaft. The hosel has a hosel axis. The CG is located (i) closer to the sole than to the top in the width direction of the body, (ii) closer to the heel than to the toe in a length direction of the body, and (iii) on or in front of a vertical plane passing the hosel axis when the bottom surface of the sole is in contact with the playing surface.

[0009]In some exemplary embodiments, the body and the hosel are formed as a unitary piece.

[0010]In some exemplary embodiments, the striking surface has a loft angle selected from a group consisting of about 26.8°, about 29.8°, about 32.8°, about 35.8°, about 38.8°, about 41.8°, about 44.8°, about 47.8°, about 50.8°, about 53.8°, about 56.8°, about 59.8°, about 62.8°, about 65.8°, and about 68.8°.

[0011]In some exemplary embodiments, the face includes a plurality of grooves to help grip the ball, impart spin, or both.

[0012]In an exemplary embodiment, each groove in the plurality of grooves is elongated in the length direction of the body.

[0013]In some exemplary embodiments, the back is curved substantially smoothly from the top to the sole and from the toe to the heel.

[0014]In some exemplary embodiments, a width from the top to the sole in the width direction of the body is from about 59 mm to about 65 mm. A length from the toe to the heel in the length direction of the body is about 78 mm. A width of the heel in the width direction of the body is from about 34 mm to about 40 mm.

[0015]In some exemplary embodiments, the hosel has a lie angle of from about 59° to about 60°.

[0016]In some exemplary embodiments, the top has a maximal thickness of from about 4 mm to about 6 mm, and the sole has a maximal thickness of from about 22 to about 26 mm.

[0017]In some exemplary embodiments, the bottom surface of the sole comprises a front bottom edge and a rear bottom edge, wherein a distance from the rear bottom edge to the front bottom edge varies along the length direction of the body and reaches a maximum at a peak between the toe and the heel in the length direction of the body.

[0018]In some exemplary embodiments, a thickness of the sole varies along the length direction of the body and reaches a maximum at a peak between the toe and the heel in the length direction of the body.

[0019]In some exemplary embodiments, the CG of the golf clubhead is located between the peak of the sole and the heel in the length direction of the body.

[0020]In some exemplary embodiments, a distance between the CG of the golf clubhead and the peak of the sole in the length direction of the body is from about 3 mm to about 4 mm.

[0021]In some exemplary embodiments, the CG of the golf clubhead has a height relative to the playing surface contacting the sole of the body, wherein the height is from about 19 mm to about 22 mm.

[0022]In some exemplary embodiments, when the bottom surface of the sole is in contact with the playing surface, the CG of the golf clubhead is located in front of the vertical plane passing the hosel axis at a distance from about 0.05 mm to about 2.6 mm.

[0023]In some exemplary embodiments, the bottom surface of the sole is curved along the thickness direction of the body to help swing the golf clubhead.

[0024]In some exemplary embodiments, a curve of the bottom surface of the sole along the thickness direction of the body is substantially a segment of a circle with a center located at or adjacent the hosel axis.

[0025]In various exemplary embodiments, the present disclosure provides a golf clubhead including a body, a hosel and a center of gravity (CG). The body includes a heel, a toe, a top, a sole and a face. The heel is at a right side of the body. The toe is at a left side of the body and wider than the heel in a width direction of the body. The top is at an upper side of the body. The sole is at a lower side of the body and includes a bottom surface for contacting a playing surface in use. A thickness of the sole varies along a length direction of the body and reaches a maximum at a peak between the heel and the toe of the body. The face is at a front side of the body and includes a striking surface for striking a ball. The striking surface has a loft angle when the bottom surface of the sole is in contact with the playing surface. The hosel is coupled with the heel of the body for connecting the golf clubhead with a shaft. The hosel has a lie angle when the bottom surface of the sole is in contact with the playing surface. The CG is located closer to the heel than to the toe in a length direction of the body, and closer to the sole than to the top in the width direction of the body.

[0026]In various exemplary embodiments, the present disclosure provides a set including a plurality of golf clubheads. Each of the plurality of golf clubheads includes a body, a hosel and a center of gravity (CG). The body includes a heel at a right side of the body and a toe at a left side of the body and wider than the heel in a width direction of the body. The body also includes a top at an upper side of the body and a sole at a lower side of the body and thicker than the top in a thickness direction of the body. The sole includes a bottom surface for contacting a playing surface in use. The body further includes a face at a front side of the body and including a striking surface for striking a ball. The striking surface has a loft angle when the bottom surface of the sole is in contact with the playing surface. The hosel is coupled with the heel of the body and configured for connecting the golf clubhead with a shaft. The hosel has a lie angle when the bottom surface of the sole is in contact with the playing surface. The CG is located closer to the heel than to the toe in a length direction of the body, and closer to the sole than to the top in the width direction of the body. Moreover, an angle difference between the loft angle of the striking surface of a golf clubhead in the plurality of golf clubheads and the loft angle of the striking surface of a next golf clubhead in the plurality of golf clubheads is from about 3° to about 3.5°. Further, the lie angle of the hosel of the golf clubhead in the plurality of golf clubheads and the lie angle of the hosel of the next golf clubhead in the plurality of golf clubheads are substantially the same.

[0027]In various exemplary embodiments, the present disclosure provides a golf club including any golf clubhead disclosure herein and a shaft connected to the golf clubhead via the hosel of the golf clubhead.

[0028]The golf clubheads and golf clubs of the present disclosure have other features and advantages that will be apparent from, or are set forth in more detail in, the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of exemplary embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

[0029]The accompanying drawings, which are incorporated into and constitute a part of this specification, illustrate one or more exemplary embodiments of the present disclosure and, together with the Detailed Description, serve to explain the principles and implementations of exemplary embodiments of the invention.

[0030]FIG. 1 is a front side and partially cutout view schematically illustrating an exemplary golf clubhead in accordance with exemplary embodiments of the present disclosure.

[0031]FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1.

[0032]FIG. 3 is a top view schematically illustrating the exemplary golf clubhead of FIG. 1 in accordance with exemplary embodiments of the present disclosure.

[0033]FIG. 4 is a bottom view schematically illustrating the exemplary golf clubhead of FIG. 1 in accordance with exemplary embodiments of the present disclosure.

[0034]FIG. 5 is a front side perspective view schematically illustrating the exemplary golf clubhead of FIG. 1 in accordance with exemplary embodiments of the present disclosure.

[0035]FIG. 6 is a rear side perspective view schematically illustrating the exemplary golf clubhead of FIG. 1 in accordance with exemplary embodiments of the present disclosure.

[0036]FIG. 7 is another front side perspective view schematically illustrating the exemplary golf clubhead of FIG. 1 in accordance with exemplary embodiments of the present disclosure.

[0037]FIG. 8 is a right side view schematically illustrating the exemplary golf clubhead of FIG. 1 in accordance with exemplary embodiments of the present disclosure.

[0038]As will be apparent to those of skill in the art, the components illustrated in the figures described above are combinable in any useful number and combination. The figures are intended to be illustrative in nature and are not limiting.

DETAILED DESCRIPTION

[0039]Reference will now be made in detail to implementation of exemplary embodiments of the present disclosure as illustrated in the accompanying drawings. The same reference indicators will be used throughout the drawings and the following detailed description to refer to the same or like parts. Those of ordinary skill in the art will understand that the following detailed description is illustrative only and is not intended to be in any way limiting. Other embodiments of the present disclosure will readily suggest themselves to such skilled persons having benefit of this disclosure.

[0040]In the interest of clarity, not all of the routine features of the implementations described herein are shown and described. It will be appreciated that, in the development of any such actual implementation, numerous implementation-specific decisions are made in order to achieve the developer's specific goals, such as compliance with application- and business-related constraints, and that these specific goals will vary from one implementation to another and from one developer to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking of engineering for those of ordinary skill in the art having the benefit of this disclosure.

[0041]Many modifications and variations of the exemplary embodiments set forth in this disclosure can be made without departing from the spirit and scope of the exemplary embodiments, as will be apparent to those skilled in the art. The specific exemplary embodiments described herein are offered by way of example only, and the disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled.

[0042]Embodiments of the present disclosure are described in the context of golf clubheads and golfclubs. A golf clubhead generally includes a body and a hosel coupled with the body and configured for connecting the golf clubhead to a shaft. The body and hosel are configured to strategically position the center of gravity at a desired position and to improve the performance and feel. In various exemplary embodiments, the body and hosel are configured to place the center of gravity closer to the sole than to the top, closer to the heel than to the toe, and/or on or in front of a vertical plane passing the hosel axis when the sole is in contact with a playing surface. Compared to the existing golf clubheads of similar types, the golf clubheads of the present disclosure have improved stability and energy output and can result in improved performance and feel.

Exemplary Golf Clubhead

[0043]Referring now to FIG. 1-8, there is depicted an exemplary golf clubhead, generally designated 100, in accordance with some exemplary embodiments of the present disclosure. Golf clubhead 100 includes a body, such as body 101, and a hosel, such as hosel 102. The body and hosel are coupled with (e.g., connected to or formed with) each other. In some exemplary embodiments, the body and hosel are integrally formed with each other as a unitary piece. The body and hosel are configured to strategically position center of gravity (CG) 103 of the golf clubhead at a desired location. The CG of a golf clubhead matters because it has a significant impact on both performance and feel. For instance, it can affect how high a driver launches, how low it spins, how it feels, and how it sounds at impact.

[0044]In some exemplary embodiments, some or all components of the clubhead, e.g., the body, the hose or both of the body and the hosel, are made of metal, such as iron, titanium, aluminum, titanium alloys, aluminum alloys, steels (including stainless steels), and the like. In some exemplary embodiments, some or all components of the clubhead are made of one or more composite materials, such as carbon fiber-polymer composites. Metal components can be formed by forging, molding, casting, stamping, machining, and/or other techniques. Composite components can be made by prepreg processing, powder-based techniques, mold infiltration, and/or other composite processing techniques.

[0045]Referring in particular to FIGS. 1, 2 and 6, body 101 includes a face, such as face 110, at a front side of the body, and a back, such as back 120, at a rear side of the body. Body 101 also includes a top, such as top 130, at an upper side of the body and a sole, such as sole 140, at a lower side of the body. Body 101 further includes a heel, such as heel 150, at a left side of the body, and a toe, such as toe 160, at a right side of the body.

[0046]Face 110 includes a striking surface, such as striking surface 112. The striking surface is configured for striking a ball. In some exemplary embodiments, the striking surface is an area of the face. In some exemplary embodiments, the striking surface occupies at least 50%, at least 60%, at least 70% or at least 80% of the face. The striking surface or the face is substantially planar.

[0047]In some exemplary embodiments, face 110 includes a plurality of grooves, such as groove 114, to help grip a ball, impart spin, or both. In some exemplary embodiments, groove 114 is elongated in a toe-to-heel direction (e.g., x-direction in FIG. 7), referred herein as the length direction of the body. In some exemplary embodiments, groove has a depth of from about 0.2 mm to about 0.5 mm, and a width of from about 0.4 mm to about 0.6 mm. Adjacent grooves are spaced apart, for instance, at a distance of about 3.9 mm. However, the present disclosure is not limited thereto. The grooves can have other shapes (e.g., shorter grooves, dots, etc.) and sizes, and can form other patterns.

[0048]Back 120 is curved. In some exemplary embodiments, the back is curved substantially smoothly from the top to the sole and from the toe to the heel. That is, the back has no visual holes, lumps, or areas that rise or fall suddenly, or the curvature of the back has no abrupt changes. There are no cavities or channels between the back and the striking surface or between the back and the face. This ensures that the striking surface and the face have sufficient strength to reduce or eliminate deformation upon impact, thereby improving the stability, energy output and performance. Moreover, the back adjacent to the sole extends further rearward than adjacent to the top, making the sole thicker than the top. This shifts the weight more to the sole, thereby lowering the CG. Further, the back is profiled so that the face can flex to help improve the velocity the golf ball leaves the striking surface.

[0049]Sole 140 includes a bottom surface, such as bottom surface 142. The bottom surface is configured for contacting a playing surface (e.g., a ground) when the golf clubhead is in use.

[0050]Hosel 102 is coupled with the heel of the body and configured for connecting the golf clubhead with a shaft. The hosel has a hosel axis, such as hosel axis 170. When the bottom surface of the sole is in contact with a playing surface, the hosel axis is inclined with respect to the playing surface at a lie angle, such as lie angle “θ” illustrated in FIG. 1. In some exemplary embodiments, the hosel axis is inclined at a lie angle of from about 59° to about 60°. In an exemplary embodiment, the hosel axis is inclined at a lie angle of about 59.8°. However, the present disclosure is not limited thereto. The golf clubhead can be configured with different lie angles (e.g., smaller than 59° or larger than 60°).

[0051]In some exemplary embodiments, striking surface 112 is inclined with respect to the hosel axis (e.g., inclined with respect to a vertical plane passing the hosel axis when the bottom surface of the sole is in contact with a playing surface) at a loft angle, such as loft angle “α” illustrated in FIG. 2. The loft angle is configured to give a ball an appreciable degree of lift and/or spin when struck and thus affect the trajectory of the ball. In some exemplary embodiments, the striking surface is inclined at a loft angle having a value within a range of from about 26.8° to about 68.8°. For instance, in some exemplary embodiments, the striking surface is inclined at a loft angle selected from a group consisting of about 26.8°, about 29.8°, about 32.8°, about 35.8°, about 38.8°, about 41.8°, about 44.8°, about 47.8°, about 50.8°, about 53.8°, about 56.8°, about 59.8°, about 62.8°, about 65.8°, and about 68.8°. However, the present disclosure is not limited thereto. For instance, in an exemplary embodiment, the striking surface is inclined at a loft angle that is smaller than 26.8°.

[0052]Referring in particular to FIGS. 2, 4, 7 and 8, a direction from toe 160 to heel 150 (e.g., x-direction in FIG. 7) is referred herein as the length direction of the body. A direction from sole 140 to top 130 (e.g., y-direction in FIGS. 2, 7 and 8) is referred herein as the width direction of the body. A direction from face 110 to back 120 (e.g., z-direction in FIGS. 2 and 8) is referred herein as the thickness direction of the body. In some exemplary embodiments, when the bottom surface of the sole is in contact with a playing surface, the length direction of the body is substantially parallel to the playing surface, and the width direction of the body is substantially perpendicular to the length direction of the body. In some exemplary embodiments where the striking surface or the face is generally planar, the thickness direction of the body is substantially perpendicular to the striking surface or the face.

[0053]In some exemplary embodiments, the body has a width “b” from the top to the sole and a length “c” from the toe to the heel. In typical embodiments, width “b” represents the maximal dimension of the body in the width direction. The width of the body varies from the toe to the heel. In some exemplary embodiments, the width of the body maintains substantially the same or decreases slightly from the maximal dimension toward the toe, but decreases relatively more rapidly toward the heel. As a result, the toe is generally wider than the heel in the width direction of the body. In some exemplary embodiments, the heel has a width “d”. In some exemplary embodiments, the width “b” (or the width of the toe) is from about 59 mm to about 65 mm, the width “d” of the heel is from about 34 mm to about 40 mm, and/or the length “c” is about 78 mm. However, the present disclosure is not limited thereto. The body and its components can have other shapes and sizes.

[0054]In some exemplary embodiments, the top has a thickness that is generally constant or varies slightly in the width direction and/or the length direction of the body. In some exemplary embodiments, the top has a maximal thickness “f”. In some exemplary embodiments, the maximal thickness “f” of the top is within a range of from about 4 mm to about 4.5 mm, from about 4 mm to about 5 mm, from about 4.5 mm to about 5 mm, from about 5 mm to about 6 mm, or from about 4 mm to about 6 mm. In an exemplary embodiment, the maximal thickness “f” of the top is about 4.82 mm.

[0055]The sole is generally thicker than the top in the thickness direction of the body. In some exemplary embodiments, the bottom surface of the sole includes a front bottom edge, such as front bottom edge 143, and a rear bottom edge, such as rear bottom edge 144. In some exemplary embodiments, the front bottom edge is an interface or a boundary between the face and the bottom surface, and the rear bottom edge is an interface or a boundary between the back and the bottom surface. In some exemplary embodiments, the thickness of the sole is represented by the distance from the front bottom edge to the rear bottom edge, which often varies along the length direction of the body. In some exemplary embodiments, the distance from the front bottom edge to the rear bottom edge (thus, the thickness of the sole) reaches a maximal distance/thickness “g” at a peak, such as peak 146, located between the toe and the heel in the length direction of the body. In some exemplary embodiments, the maximal distance/thickness “g” of the sole is within a range of from about 22 to about 23 mm, from about 22 to about 24 mm, from about 22 to about 25 mm, from about 22 to about 26 mm, from about 23 to about 25 mm, from about 23 to about 26 mm, or from about 25 to about 26 mm. In an exemplary embodiment, the maximal distance/thickness “g” of the sole is about 23 mm.

[0056]In some exemplary embodiments, the peak is located in the middle (e.g., coincide with the geometric center) of the body in the length direction of the body. In some exemplary embodiments, the rear bottom edge has a wave-like shape along the length direction of the body, with the wave crest at the peak and a first wave trough toward the toe and a second wave trough toward the heel. The first and second wave troughs can be the same or different. However, the present disclosure is not limited thereto. For instance, the back and bottom surface can be configured to form a different rear bottom edge, e.g., with a different shape, at a different distance to the front bottom edge, and/or the peak at a different location.

[0057]In some exemplary embodiments, the bottom surface of the sole is curved along the thickness direction of the body to help swing the golf clubhead. For instance, as a non-limiting example, FIG. 2 illustrates that the cross-section of the bottom surface of the sole has a curve, such as curve 148, that is substantially a segment of a circle with a center located at or adjacent the hosel axis. Such a bottom surface allows the golf clubhead to contact the playing surface but exerts minimal resistance to the golf clubhead during the swing.

[0058]Referring in particular to FIGS. 1 and 8, body 101 and hosel 102 are configured such that CG 103 is located (i) closer to the sole than to the top in the width direction of the body, (ii) closer to the heel than to the toe in a length direction of the body, (iii) on or before a vertical plane passing the hosel axis (e.g., the hosel axis lies on the vertical plane) when the bottom surface of the sole is in contact with a playing surface, or any combination thereof.

[0059]In some exemplary embodiments, the CG of the golf clubhead is located between the peak of the sole (represented by line A-A in FIG. 1 which passes the peak) and the heel in the length direction of the body. In some exemplary embodiments, the CG of the golf clubhead is located at a distance “a” to the peak of the sole in the length direction of the body. In some exemplary embodiments, the distance “a” is from about 3 mm to about 4 mm.

[0060]In some exemplary embodiments, the CG of the golf clubhead has a height “h” relative to a playing surface contacting the sole of the body. In some exemplary embodiments, the height is from about 19 mm to about 22 mm.

[0061]In some exemplary embodiments, when the bottom surface of the sole is in contact with a playing surface, the CG of the golf clubhead is in front of the vertical plane passing the hosel axis at a distance “e” illustrated in FIG. 8. In some exemplary embodiments, the distance “e” is from about 0.05 mm to about 2.6 mm.

[0062]While golf clubhead 100 disclosed herein has the CG toward the sole of the clubhead (i.e., CG Low), it should be noted that the present disclosure is not limited thereto. The concept of the present disclosure can be used to design other types of golf clubheads. For instance, the concept of the present disclosure can be used to design a CG Forward (location of the CG toward the face) golf clubhead, a CG Back (away from the face) golf clubhead, or a CG High (toward the top of the clubhead) golf clubhead by adjusting the profile of the back, the profile of the bottom rear edge, the width of the body, the length of the body, the width of the heel, the loft angle, the lie angle, and/or other parameters and characteristics.

Exemplary Configurations

[0063]Provided below are examples of specific embodiments of the present disclosure. The examples are offered for illustrative purposes only, and are not intended to limit the scope of the present invention in any way. The values can be actual values as stated but also allow for approximations, inaccuracies and limits of measurement under the relevant circumstances such as a tolerance of from less than one percent to ten percent of the actual value stated.

[0064]Example 1. Golf clubhead 100 is configured with the loft angle “α” of the face at about 26.8°, the width “b” of body at about 60.8 mm, the length “c” of the body at about 78 mm, and the width “d” of the heel at about 35.8 mm. The CG of the golf clubhead in this example is located at the right side of the peak of the sole in the length direction of the body with the distance “a” of about 3.53 mm, in front of the vertical plane passing the hosel axis with the distance “e” of about 1.5 mm when the bottom surface of the sole is in contact with a playing surface, and with the height “h” of about 22 mm relative to the playing surface.

[0065]Example 2. Golf clubhead 100 is configured with the loft angle “α” of the face at about 29.8°, the width “b” of body at about 60.8 mm, the length “c” of the body at about 78 mm, and the width “d” of the heel at about 35.8 mm. The CG of the golf clubhead in this example is located at the right side of the peak of the sole in the length direction of the body with the distance “a” of about 3.53 mm, in front of the vertical plane passing the hosel axis with the distance “e” of about 0.71 mm when the bottom surface of the sole is in contact with a playing surface, and with the height “h” of about 21 mm relative to the playing surface.

[0066]Example 3. Golf clubhead 100 is configured with the loft angle “α” of the face at about 32.8°, the width “b” of body at about 60.8 mm, the length “c” of the body at about 78 mm, and the width “d” of the heel at about 35.8 mm. The CG of the golf clubhead in this example is located at the right side of the peak of the sole in the length direction of the body with the distance “a” of about 3.63 mm, in front of the vertical plane passing the hosel axis with the distance “e” of about 0.07 mm when the bottom surface of the sole is in contact with a playing surface, and with the height “h” of about 21 mm relative to the playing surface.

[0067]Example 4. Golf clubhead 100 is configured with the loft angle “α” of the face at about 25.8°, the width “b” of body at about 60.8 mm, the length “c” of the body at about 78 mm, and the width “d” of the heel at about 35.8 mm. The CG of the golf clubhead in this example is located at the right side of the peak of the sole in the length direction of the body with the distance “a” of about 3.6 mm, in front of the vertical plane passing the hosel axis with the distance “e” of about 0.84 mm when the bottom surface of the sole is in contact with a playing surface, and with the height “h” of about 20 mm relative to the playing surface.

[0068]Example 5. Golf clubhead 100 is configured with the loft angle “α” of the face at about 38.8°, the width “b” of body at about 60.8 mm, the length “c” of the body at about 78 mm, and the width “d” of the heel at about 35.8 mm. The CG of the golf clubhead in this example is located at the right side of the peak of the sole in the length direction of the body with the distance “a” of about 3.55 mm, in front of the vertical plane passing the hosel axis with the distance “e” of about 1.63 mm when the bottom surface of the sole is in contact with a playing surface, and with the height “h” of about 19 mm relative to the playing surface.

[0069]Example 6. Golf clubhead 100 is configured with the loft angle “α” of the face at about 41.8°, the width “b” of body at about 60.8 mm, the length “c” of the body at about 78 mm, and the width “d” of the heel at about 35.8 mm. The CG of the golf clubhead in this example is located at the right side of the peak of the sole in the length direction of the body with the distance “a” of about 3.274 mm, in front of the vertical plane passing the hosel axis with the distance “e” of about 0.2.53 mm when the bottom surface of the sole is in contact with a playing surface, and with the height “h” of about 19 mm relative to the playing surface.

Exemplary Golf Club and Set

[0070]Any golf clubhead disclosed herein can be used to make a golf club by connecting the golf clubhead to a shaft via the hosel. A plurality of golf clubheads can be used to collectively form a golf clubhead set. Similarly, a plurality of golf clubs can be used to collectively form a golf club set. A golf clubhead or golf club set can include any suitable number of golf clubheads or golf clubs.

[0071]For instance, in some exemplary embodiments, a golf clubhead set includes two, three, four, five or more than five golf clubheads. In some exemplary embodiments, a golf clubhead set includes six, seven, eight, nine, ten or more than ten golf clubheads.

[0072]In various embodiments, each of the plurality of golf clubheads includes a body (e.g., body 101), a hosel (e.g., hosel 102) coupled with the body, and a CG (e.g., CG 103) that is that is closer to the heel than to the toe in a length direction of the body, and closer to the sole than to the top in the width direction of the body.

[0073]In some exemplary embodiments, each of the plurality of golf clubheads is configured with a substantially the same lie angle. For instance, in some exemplary embodiments, the lie angle of a golf clubhead (e.g., #4) in the plurality of golf clubheads is substantially the same as the lie angle of the next golf clubhead (e.g., #5) in the plurality of golf clubheads. In some exemplary embodiments, the lie angle is from about 59° to about 60°. In an exemplary embodiment, the lie angle is about 59.8°. However, the present disclosure is not limited thereto. The golf clubheads can be configured with different lie angles (e.g., smaller than 59° or larger than 60°).

[0074]In some exemplary embodiments, each respective golf clubhead in the plurality of golf clubheads is configured with a corresponding loft angle that is unique to the respective golf clubhead set includes, e.g., no two golf clubheads in the plurality of golf clubheads having the same loft angle. In some exemplary embodiments, golf clubheads in the plurality of golf clubheads are numbered consecutively in accordance with their loft angles. The angle difference between the loft angle of a golf clubhead in the plurality of golf clubheads and the loft angle of a next golf clubhead in the plurality of golf clubheads may be a constant (e.g., the angle difference between #4 and #5 clubheads is the same as the angle difference between #5 and #6 clubheads) or a variable (e.g., the angle difference between #4 and #5 clubheads is different than the angle difference between #5 and #6 clubheads). In some exemplary embodiments, the angle difference is from about 3° to about 3.5°.

[0075]In some exemplary embodiments, the plurality of golf clubheads includes a first golf clubhead with the loft angle not smaller than about 26.8° and a last golf clubhead with the loft angle not larger than about 68.8°. In some exemplary embodiments, the plurality of golf clubheads includes 9 golf clubheads with the loft angles of about 26.8°, about 29.8°, about 32.8°, about 35.8°, about 38.8°, about 41.8°, about 44.8°, about 47.8°, and about 50.8° respectively. In some exemplary embodiments, the plurality of golf clubheads includes 12 golf clubheads with the loft angles of about 26.8°, about 29.8°, about 32.8°, about 35.8°, about 38.8°, about 41.8°, about 44.8°, about 47.8°, about 50.8°, about 53.8°, about 56.8°, and about 59.8° respectively. In some exemplary embodiments, the plurality of golf clubheads includes 15 golf clubheads with the loft angles of about 26.8°, about 29.8°, about 32.8°, about 35.8°, about 38.8°, about 41.8°, about 44.8°, about 47.8°, about 50.8°, about 53.8°, about 56.8°, about 59.8°, about 62.8°, about 65.8°, and about 68.8° respectively. However, the present disclosure is not limited thereto. The plurality of golf clubheads can include different numbers (e.g., 6, 7, 8, etc.) of golf clubheads, and/or different loft angles. For instance, in some exemplary embodiments, the plurality of golf clubheads includes one or more golf clubheads configured substantially the same as or similar to Examples 1-6 disclosed above. In an exemplary embodiment, the plurality of golf clubheads includes 6 golf clubheads, such as Examples 1-6 disclosed above.

[0076]The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the claims. As used in the description of the implementations and the appended claims, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0077]As used herein, the term “about” is relative to the actual value stated, as will be appreciated by those of skill in the art and allows for approximations, inaccuracies and limits of measurement under the relevant circumstances. In one or more aspects, the terms “about,” “substantially,” and “approximately” may provide an industry-accepted tolerance for their corresponding terms and/or relativity between items, such as a tolerance of from less than one percent to ten percent of the actual value stated, and other suitable tolerance.

[0078]It should be appreciated that all numerical values and ranges disclosed herein are approximate values and ranges, whether “about” is used in conjunction therewith. It should also be appreciated that the term “about,” as used herein, in conjunction with a numeral refers to a value that may be ±0.01% (inclusive), ±0.1% (inclusive), ±0.5% (inclusive), ±1% (inclusive) of that numeral, ±2% (inclusive) of that numeral, ±3% (inclusive) of that numeral, ±5% (inclusive) of that numeral, ±10% (inclusive) of that numeral, or ±15% (inclusive) of that numeral. It should further be appreciated that when a numerical range is disclosed herein, any numerical value falling within the range is also specifically disclosed.

[0079]It will be understood that the terms “front” or “rear”, “left” or “right”, “upper” or “lower”, and etc. are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures.