KR20210002595U - Golf club head with improved inertia performance - Google Patents

Abstract

A golf club head is disclosed herein that can improve both the inertial properties of the golf club head while also improving the center of gravity (CG) position. More specifically, a golf club head according to the present invention achieves a relatively low moment of inertia (MOI) (MOI-Z) about the Z-axis as well as a relatively low MOI (MOI-SA) about the shaft axis, and both X and It is combined with both high MOIs for the Y-axis (MOI-X and MOI-Y) and maintains a consistent and relatively low CG position (CG-B) measured along the XY plane and tangent to the hosel axis.

Description

Golf club head with improved inertia performance {GOLF CLUB HEAD WITH IMPROVED INERTIA PERFORMANCE}

This application is a continuation-in-part of co-pending US Application No. 16/219,651, filed December 13, 2018, and co-pending United States, filed August 13, 2019, which is incorporated herein by reference in its entirety. It is a continuation-in-part of co-pending U.S. Application Serial No. 16/780,040, filed February 3, 2020, a continuation-in-part of Application No. 16/539,622.

SUMMARY OF THE INVENTION The present invention relates generally to novel and improved golf clubs having improved moment of inertia (MOI) characteristics in combination with improved center of gravity (CG) position. More specifically, a golf club head according to the present invention achieves a relatively low moment of inertia (MOI) about the Z-axis (MOI-Z), a low MOI about the shaft axis (MOI-SA), and both X and Y- Combined with a high MOI about the axis (MOI-X and MOI-Y), it maintains a consistent and relatively low CG position (CG-B) measured along the XY plane and perpendicular to the hosel axis.

With the development of modern oversized metalwood, the performance capabilities of these types of golf clubs have been dramatically increased compared to their predecessor "persimmon wood". One of the ways these metalwood-type golf clubs perform better than their predecessor models is an increase in overall distance, usually due to the inherent elastic deformation of the thin metallic metal material used by these metalwoods. am. Another way that metalwood-type golf clubs outperform their predecessors is an increase in the overall forgiveness of the golf club head, generally due to an increase in the MOI of the golf club head itself.

The MOI of a golf club head is a term generally used to describe the ability of an object to resist rotational motion upon impact with a secondary object. In the case of a golf club head, MOI refers to the ability of a golf club head to resist undesirable torsion upon impact with a golf ball, which torsion motion is typically the face angle of the golf club head. will change away from the intended target line, sending the golf ball away from the intended target.

US Pat. No. 5,354,055 to MacKeil discloses one of the earliest attempts to increase the MOI of a golf club head by positioning the center of gravity (CG) position posteriorly. No. 6,364,788 to Helmstetter et al. discloses the use of a weighting member to help control the MOI of a golf club head. All of these patents refer to the MOI-y of the golf club head as it relates to the ability of the golf club head to remain stable when subjected to eccentric impact in the heel and toe directions.

U.S. Pat. No. 7,850,542 to Cackett et al. exemplifies further developments in MOI studies recognizing different axes of rotation at different MOIs. Notwithstanding the recognition and identification of differences in MOI values (alternatively known as Ixx, Iyy and Izz instead of MOI-X, MOI-Y and MOI-Z), US Pat. Without any realization of the importance of MOI-SAs and how they can affect the performance of a golf club, they focus only on Ixx and Iyy (changed to fit the current standard nomenclature).

Notwithstanding the above, no reference has been made of the importance of the MOI (MOI-Z) of the golf club head horizontally forward and aft of the face, and golf with more optimal MOI-Z values with minimized MOI-Sa values. They do not recognize how to design a golf club that takes advantage of the performance characteristics of the club. Moreover, closer examination of MOI-Z values produces CG positions that work with the MOI-Z values to produce more performance. Therefore, it can be seen from the above that there is a need for more research and design of golf clubs that can achieve better performance by examining the importance of CG position as well as MOI-Z and MOI-SA and designing the golf club head. can

One aspect of the present invention is a golf club head comprising a golf club head, a shaft, and a grip, the shaft coupled to the golf club head at a first end of the shaft, the grip coupled to the shaft at a second end of the shaft, The club head includes a front portion positioned on the front portion of the golf club head, further comprising a striking face defining a face center; a rear portion positioned aft of the striking face; and at least one first weighting member positioned substantially in line with the face center and behind the center of the golf club head in a heel to toe orientation; The x-axis is defined as the horizontal axis having a positive direction towards the heel of the golf club head and tangent to the geometric center of the striking face, and the y-axis has a positive direction towards the crown of the golf club head and is on the x-axis. an orthogonal vertical axis, wherein the z-axis has a positive direction towards the front portion of the golf club head and is orthogonal to both the x-axis and the y-axis, the golf club head having a MOI-Y to MOI- greater than about 1.50 A golf club head, with a Z ratio.

In another aspect of the present invention a golf club head includes a front portion positioned at a front portion of the golf club head, further comprising a striking face defining a face center, a rear portion positioned aft of the striking face, and substantially in line with the face center at least one first weighting member positioned proximate a central portion of the golf club head in a heel to toe orientation; The x-axis is defined as the horizontal axis having a positive direction towards the heel of the golf club head and tangent to the geometric center of the striking face, and the y-axis has a positive direction towards the crown of the golf club head and is on the x-axis. an orthogonal vertical axis, wherein the z-axis has a positive direction towards the front of the golf club head and is orthogonal to both the x-axis and the y-axis, the golf club head having the following formula

을 만족하는 MOI-X, MOI-Z 및 CG-Z 수치를 갖는, 골프 클럽 헤드로 구성된다.

It consists of a golf club head, having MOI-X, MOI-Z and CG-Z values that satisfy

Another aspect of the present invention is a golf club head comprising a striking face formed of metal, a crown return, a sole return and a central body member. A central body member is positioned near the central portion of the golf club head in a heel-to-toe orientation, substantially in line along the z-axis, and extends from the crown return and sole return to the rear edge of the golf club.

Preferably, the golf club head is further comprised of a heel body member made of a non-metallic material and coupled to the heel side of the central body member and a toe body member made of a non-metallic material and coupled to the toe side of the central body member. The golf club head may further include two weight members, one forward near the striking face and one aft near the rear edge. In one embodiment, the wall member is coupled to the crown portion of the central body member and the sole portion of the central body member and extends between the first and second weight members.

In another embodiment, the golf club head further comprises a central support member comprised of a plurality of angled strut members extending from the crown to the sole between the two weight members. Preferably, a first angled strut member extends from the crown portion to the sole of the central body member, and a second angled strut member extends from the sole portion to the crown of the central body member, the first and second angled struts The members intersect each other. More preferably, the first and second angled strut members extend at an angle of from 15 degrees to 75 degrees from both the y-axis and the z-axis. The golf club head may further include a third angled strut member extending from the crown portion of the central body member to the sole and a fourth angled strut member extending from the sole portion of the central body member to the crown, the third and third The tetragonal strut members intersect each other. The third and fourth angled strut members also extend at an angle of 15 to 75 degrees from both the y-axis and the z-axis, preferably the third angled strut member is coupled to the first angled strut member and the second angled strut member The tetragonal strut member is coupled to the second angled strut member. The golf club may further include a vertical strut member extending perpendicularly, substantially parallel to the y-axis, between the fourth and third angled strut members.

These and other features, aspects and advantages of the present invention may be better understood with reference to the following drawings, detailed description and claims.

The invention and other features and advantages will become apparent from the following description of the invention as shown in the accompanying drawings. The accompanying drawings, which are incorporated in and form a part of this specification, also serve to explain the principles of the present invention and to enable those skilled in the art to make and use the present invention.
1 of the accompanying drawings is a perspective view of a golf club head according to an exemplary embodiment of the present invention;
2 is a plan view of a golf club head according to an exemplary embodiment of the present invention;
3 is a front view of a golf club head according to an exemplary embodiment of the present invention;
4 of the accompanying drawings shows a plot of MOI-Z versus MOI-Y values for the present invention as compared to a prior art golf club head;
5 of the accompanying drawings shows a plot of MOI-Z versus MOI-shaft axis values for the present invention as compared to a prior art golf club head;
6 of the accompanying drawings shows a plot of MOI-Y versus MOI-shaft axis values for the present invention as compared to a prior art golf club head;
7 of the accompanying drawings shows a plot of MOI-X versus MOI-shaft axis values for the present invention as compared to a prior art golf club head;
8 of the accompanying drawings shows a plot of MOI-Z versus CG-B/face width values for the present invention as compared to a prior art golf club head;
9 of the accompanying drawings shows a plot of MOI-Z versus CG-B/head width values for the present invention as compared to a prior art golf club head.
10 of the accompanying drawings shows a plot of MOI-X/MOI-Z versus CG-Z values for the present invention as compared to a prior art golf club head;
11 of the accompanying drawings shows a plot of MOI-Y/MOI-Z versus CG-Z values for the present invention as compared to a prior art golf club head;
12 of the accompanying drawings shows a plot of (MOI-X + MOI-Y)/MOI-Z versus CG-Z values for the present invention as compared to a prior art golf club head.
13 of the accompanying drawings is an exploded sole perspective view of a golf club head according to an exemplary embodiment of the present invention;
14 of the accompanying drawings is a view showing a horizontal cross-sectional view of a golf club head according to an exemplary embodiment of the present invention.
15 of the accompanying drawings is a view showing a vertical cross-sectional view of a golf club head according to an exemplary embodiment of the present invention.
16 of the accompanying drawings is a view showing a perspective view of a golf club head according to an alternative embodiment of the present invention.
17 of the accompanying drawings is a view showing a plan view of a golf club head according to an alternative embodiment of the present invention.
18 of the accompanying drawings is a view showing a front view of a golf club head according to an alternative embodiment of the present invention.
19 of the accompanying drawings is a view showing a horizontal cross-sectional view of a golf club head according to an alternative embodiment of the present invention.
20 of the accompanying drawings is a view showing a vertical cross-sectional view of a golf club head according to an alternative embodiment of the present invention.
21 of the accompanying drawings is a view showing a plan view of a golf club head according to an alternative embodiment of the present invention.
22 of the accompanying drawings is a view showing a front view of a golf club head according to an alternative embodiment of the present invention.
23 of the accompanying drawings is a view showing a plan view of a body portion of a golf club head according to an alternative embodiment of the present invention shown in FIG. 21 .
24 of the accompanying drawings is a view showing a bottom view of a body portion of a golf club head according to an alternative embodiment of the present invention shown in FIG. 21 .
25 of the accompanying drawings is a view showing a vertical side view of a body portion of a golf club head according to an alternative embodiment of the present invention.
26 of the accompanying drawings is a view showing a vertical side view of a body portion of a golf club head according to an alternative embodiment of the present invention.
27 of the accompanying drawings is a view showing a plan view of a golf club head according to an alternative embodiment of the present invention.
28 of the accompanying drawings is a view showing a plan view of a body portion of a golf club head according to an alternative embodiment of the present invention shown in FIG. 27 .
29 of the accompanying drawings is a view showing a bottom view of a body portion of a golf club head according to an alternative embodiment of the present invention shown in FIG. 27 .
30 of the accompanying drawings is a view showing a plan view of a body portion of a golf club head according to an alternative embodiment of the present invention shown in FIG. 27 .
31 of the accompanying drawings is a view showing a bottom view of a body portion of a golf club head according to an alternative embodiment of the present invention.
32 of the accompanying drawings is a view showing a cross-sectional view of the first weight member shown in FIG. 31;
33 of the accompanying drawings is a view showing a cross-sectional view of the second weight member shown in FIG. 31;
34 of the accompanying drawings is a view showing a bottom perspective view of another embodiment of the golf club head according to the present invention.
FIG. 35 of the accompanying drawings is a cross-sectional view of a golf club head according to an alternative embodiment of the present invention shown in FIG. 34;
36 of the accompanying drawings is an enlarged cross-sectional view of a golf club head according to an alternative embodiment of the present invention shown in FIG. 34 .
FIG. 37 of the accompanying drawings is an enlarged cross-sectional view of a golf club head according to an alternative embodiment of the present invention shown in FIG. 34 .
38 of the accompanying drawings is a view showing a bottom perspective view of another embodiment of the rear part of the golf club head according to the present invention.
39 of the accompanying drawings is a view showing a front view of a rear portion of a golf club head according to an alternative embodiment of the present invention shown in FIG. 38 .
FIG. 40 of the accompanying drawings is an enlarged cross-sectional view of a golf club head according to an alternative embodiment of the present invention shown in FIG. 38 .
41 of the accompanying drawings is an enlarged cross-sectional view of a golf club head according to an alternative embodiment of the present invention shown in FIG. 38 .
42 of the accompanying drawings is a view showing a bottom perspective view of another embodiment of the golf club head according to the present invention.
43 of the accompanying drawings is a cross-sectional view of a golf club head according to an alternative embodiment of the present invention shown in FIG. 42 .

The following detailed description sets forth the presently contemplated best mode for carrying out the present invention. Since the scope of the present invention is best defined by the appended claims, the description should not be taken in a limiting sense, but merely for the purpose of explaining the general principles of the present invention.

Various inventive features are described below and each may be used independently of each other or in combination with other features. However, any one inventive feature may not solve some or all of the problems described above, or may solve only one of the problems described above. Further, one or more of the problems described above may not be fully addressed by any one of the features described below.

Before starting the description of the golf club head of the present invention and its performance criteria, it is worth noting here that the following description will be based on the coordinate system 101 and the measurement axis, which are important for the proper evaluation of performance figures. Accordingly, it is important to recognize herein that while the specific names given for the following measurements are important to the understanding of the present invention, the nomenclature should not be considered in isolation. Rather, it is important that the figures presented below need to be taken in the context of how the coordinate system relates to the golf club head itself. In order to provide sufficient information to avoid any ambiguity, each drawing provided below with reference to a golf club head will be accompanied by a coordinate system that is all coincident with each other.

In accordance with the above, and in order to establish a reference coordinate system for the following description, Fig. 1 of the accompanying drawings shows a coordinate system 101 that will be used to define various measurement and performance figures for the present invention. The x-axis used in the present description refers to the axis parallel to the striking face in the heel to toe direction. The y-axis used in the present description refers to the vertical axis through the club in the crown to sole direction. The z-axis used in the present description refers to a horizontal axis horizontal from front to back in the front-rear direction. Alternatively speaking, the x-axis can be defined as the horizontal axis tangent to the geometric center of the striking face that has a positive direction towards the heel of the golf club head, and the y-axis is x with a positive direction towards the top of the golf club head. - The horizontal axis orthogonal to the axis, the z-axis has a positive direction towards the front of the golf club head and is orthogonal to both the x-axis and the y-axis. The x-y-z coordinate system described above will be the same in all subsequent descriptions.

1 of the accompanying drawings shows a perspective view of a golf club head 100 according to an embodiment of the present invention. In this perspective view shown in FIG. 1 , the golf club head 100 may not appear significantly different from other golf club heads, although the following drawings and descriptions show that the internal components and material properties of the golf club head 100 are It will be shown that it is possible to achieve unique performance characteristics according to the present invention. 1 illustrates the location of a face center 102 of a front portion 104 of a golf club head 100 that includes a striking face insert. The face center, as shown herein and referred to by the present invention, is the impact of the golf club head 100 measured by a USGA provided face center template as would be commonly known to those of ordinary skill in the golf club art. It relates to the geometric center of the face. Attached to the rear of the front portion 104 is a rear portion 106 constituting the rear end of the golf club head 100 .

In this embodiment of the present invention, the front portion 104 may be made from a steel-like material having a density generally between about 7.75 g/cc and about 8.00 g/cc, such that a substantial portion of the mass of the golf club head 100 is present. It is centered on the front lower region of the golf club head 100 . The back portion 106 of the golf club head 100 in this embodiment of the present invention may be made from a standard titanium material having a density generally between about 4.00 g/cc and about 5.00 g/cc, such that the golf club head 100 may be manufactured from a standard titanium material. ) to make the rear portion 106 of the relatively light weight. However, in an alternative embodiment of the present invention, the front portion 104 may be a standard titanium material such as TI-6-4, Ti-8-1-1, beta-titanium, or any other without departing from the scope and content of the present invention. It should be noted that it may also be made from other types of titanium material.

To illustrate more specific features of golf club head 100, FIGS. 2 and 3 of the accompanying drawings illustrate some of the specific unique characteristics of golf club head 200 that will be important in determining its improved performance. It is provided to provide more insight. First, FIG. 2 of the accompanying drawings, in addition to showing a golf club head 200 having a front portion 204 and a rear portion 206 , a center of gravity (CG) 210 along the xz plane on the coordinate system 201 . ) location is also shown. Although the details of the CG position will be described in more detail with respect to the inertial properties of the golf club head 200 of the present invention, the general orientation of the golf club head 200 of the present invention is the direction of the golf club head 200 to produce the most advantageous results. It is to have a CG position strategically located at a predetermined distance from the front to the rear.

More specifically, in the present invention, the CG position posterior from the striking face, identified herein as CG-Z, is generally from about 25 mm to about 40 mm, more preferably from about 26 mm to about 38 mm, most preferably about 27 mm to about 36 mm, all measured posteriorly from the face center 202 along the Z axis shown by the coordinate system 201 . In addition to illustrating the CG-Z 212 figure, an alternative measurement method is provided for measuring how far back the CG 210 is positioned within the club head 200 . In this alternative method, CG 210 is measured from shaft axis 215 , which measurement indicates that CG-C 214 is typically from about 10 mm to about 25 mm, more preferably from about 12 mm to about 23 mm, most preferably from about 14 mm to about 21 mm, all of which are shown as measured posteriorly from the shaft axis 215 along the Z axis shown by the coordinate system 201 .

It is noted that the strategic positioning of the posterior CG 210 position along the Z axis, whether measured from the face center 202 or the shaft axis 215, is critical to the proper functionality of the golf club head 200 of the present invention. should be If the CG 210 position is too far forward, the golf club head 200 may cause low MOI-X and MOI-Y as well as too low backspin when contacting the golf ball to produce the desired result. . However, in the alternative, if the CG 210 position is too far back, the golf club head 200 may generate too much spin to produce the desired result. Thus, it can be seen that the importance of the position of the CG backwards along the Z axis is a fine balance of values in a very specific range that deviates from the aforementioned range can seriously impede the performance of the golf club head 200 .

3 of the accompanying drawings illustrates another important CG 210 measurement important to the proper functioning of the present invention. More specifically, FIG. 3 illustrates a CG ( 210) introduces another measure of location. More specifically, FIG. 3 shows a CG 210 measurement perpendicular to the shaft axis 215 along the x-y plane away from the actual shaft axis 215 itself, referred to for this application as CG-B. The CG-B of the golf club head 210 may generally be from about 32 mm to about 39 mm, more preferably from about 33 mm to about 38 mm, and most preferably from about 35 mm.

In addition to illustrating the very important CG-B measurements of the golf club head, FIG. 3 of the accompanying drawings shows measurements W1 indicating the width of the golf club head 200 itself and the width of the face of the golf club head 200, respectively. , W2) are also shown. In this embodiment of the present invention, the width W1 of the golf club head may be generally from about 130 mm to about 140 mm, more preferably from about 132 mm to about 138 mm, and most preferably about 136 mm. The width of face W2 may generally be from about 95 mm to about 105 mm, more preferably from about 97 mm to about 103 mm, and most preferably about 100 mm.

Now that the CG position of the golf club head 200 has been defined, another important feature associated with the present invention relates to the moment of inertia (MOI) of the golf club head 200 . The MOI of a golf club head generally represents the ability of a golf club head to resist torsion when the golf club head impacts an object in a position that is not aligned with the CG position described above. More specifically, the MOI of a golf club head relates to the ability of the golf club head to resist torsion with respect to the CG position. The MOI of the golf club head 200 may be decomposed into three distinct components that generally relate to the ability of the golf club head 200 to resist rotation along three different axes. The three axes of rotation to which the MOI is generally referenced coincide with the coordinate system 101 , 201 , 301 (shown in FIGS. 1 , 2 and 3 , respectively).

As already implied in the above description, the golf club head 200 of the present invention may generally have high values for the MOIs for the X and Y axes, and maintain a low MOI for the Z axes. More specifically, the golf club head 200 of the present invention is generally ^{greater than about 300 kg-mm 2} , more preferably greater than about 310 kg-mm ² , most preferably greater than about 310 kg-mm 2 , without departing from the scope and content of the present invention. It may have a MOI (MOI-X) about the X axis that is greater than about 320 kg-mm ^{2 .} With respect to the MOI about the Y axis (MOI-Y), the golf club head 200 of the present invention generally ^{exceeds about 400 kg-mm 2} , more preferably about 410 kg, without departing from the scope and content of the present invention. It may have a MOI about the Y axis that is greater ^{than -mm 2} , most preferably greater than about 420 kg-mm ^{2 .}

The larger MOI figures for the X and Y axes described above are not necessarily novel in the field of golf club head 200 design, but they reduce the MOI for the Z axis (MOI-Z) and reduce the MOI for the shaft axis (MOI-Z). The ability to keep these values while keeping SA) to a minimum is what constitutes the present invention. While most of the golf industry has focused their attention very heavily on the ability of the golf club head 200 to provide tolerance for eccentric hits by trying to increase the MOI-Y to astronomical figures, they It fails to recognize the ability of the golf club head 200 to provide more club head speed and more ball speed by reducing the MOI (MOI-Z) about the Z axis with minimization of (MOI-SA). The present invention has developed a golf club head 200 design designed to utilize and maximize the performance of the golf club head 200 by focusing its attention on very specific unrecognized characteristics and by focusing on the MOI about the Z axis. More specifically, the golf club head 200 according to the present invention generally has a Z-axis ^{that is less than about 268 kg-mm 2} , more preferably less than about 260 kg-mm ² , and most preferably less than about 250 kg-mm ^{2 .} may have an MOI for . Additionally, the golf club head 200 may have a MOI about the shaft axis that ^{is generally less than about 850 kg-mm 2 .}

The aforementioned low MOI-Z numbers are in their own right, as older golf club heads with much smaller footprints may have lower MOI-Z values in combination with lower MOI-X and MOI-Y values. It should be noted here that it cannot be precisely represented and described. Therefore, it is important to recognize that the present invention is based on the interrelationship between the different values achieved by the MOI-X and MOI-Y values as they relate to the MOI-Z and MOI-SA, in combination with the CG positions described above. do.

To capture the essence of the present invention, ratios can be generated between MOI-X, MOI-Y and MOI-Z to help provide one way to quantify this relationship. In one first example, a MOI-X to MOI-Z ratio can be generated to help quantify the golf club head 200 of the present invention as illustrated by Equation (1) below. In one exemplary embodiment of the present invention, the MOI-X to MOI-Z ratio is greater than about 1.10, more preferably greater than about 1.20, and most preferably greater than about 1.28.

식 (1)

Formula (1)

Similarly, a corresponding ratio called MOI-Y to MOI-Z ratio for quantifying the golf club head 200 of the present invention can be established as illustrated by Equation (2) below. In one exemplary embodiment of the present invention, the MOI-Y to MOI-Z ratio is greater than about 1.50, more preferably greater than about 1.57, and most preferably greater than about 1.68.

식 (2)

Equation (2)

As can be seen from the relationship established by Equations (1) and (2) above, the present invention provides a golf club head 200 ) relates to a specific relationship between the MOI. To further illustrate this, a graphical representation of the relationship is provided as in FIG. 4 .

4 of the accompanying drawings shows plots of various data points of various golf club heads and their respective MOI-Z values as well as their MOI-Y values. 4 , the X-axis represents MOI-Y, whereas the Y-axis represents MOI-Z. The data points shown in Figure 4 are separated by circular dots and asterisks. Circular dots represent “prior art” golf club head data, while asterisk data points represent the present invention.

A closer examination of the prior art data points showed that none of the prior art golf club heads had an MOI-Y of less than ^{268 kg-mm 2} for all modern golf club heads having an MOI-Y ^{greater than 420 kg-mm 2 .} would indicate that it is not possible to achieve a Z-value. However, an even closer examination of the graph of FIG. 4 reveals the ability of the present invention to achieve an optimal MOI-Z versus MOI-Y relationship, as ^{the MOI-Y value of the golf club head exceeds 500 kg-mm 2 .} It will be shown that additional relationships can be established for quantification. Actually, the relationship is shown in Fig. 4 as Y ? 0.47x + 33. Combining the two conditions described above may result in another unique method for quantifying the present invention, whereas for a golf club head having a MOI-Y of ^{420 kg-mm 2} to 500 kg-mm ² For example, a golf club head generally has an MOI-Z of less than about 268; For a golf club head having a MOI-Y greater than 500 kg-mm ² , the golf club head may have a MOI-Z satisfying Equation (3) below.

식 (3)

Equation (3)

Alternatively, in one embodiment of the present invention, the golf club head 200 has a MOI- that satisfies the relationship MOI-Z≤(0.47 * MOI-Y) + 33 if the ^{MOI-Y value is greater than 500 kg-mm 2} If the Z, and MOI-Y values are between 420 kg-mm ² and 500 kg-mm ^{2 ,} it may be said to have a MOI-Z that is less than 268 kg-mm ^{2 .}

5 of the accompanying drawings introduces another MOI value for a golf club head not mentioned above, called MOI-Shaft Axis (MOI-SA). The MOI of a golf club head when relative to the shaft axis is defined as the ability of a golf club head to resist torsion upon impact with a golf ball in a position that is not aligned with the shaft axis. A golf club head according to the present invention may generally have an MOI-SA of less ^{than about 850 kg-mm 2} , more preferably less than about 800 kg-mm ² , and most preferably less than about 750 kg-mm ^{2 .} The relationship between MOI-SA and MOI-Z is highlighted in FIG. 5 and is important in the present invention. 5 of the accompanying drawings shows that, irrespective of the MOI-SA values, all of the golf club heads ^{of the present invention have a MOI-Z of greater than about 268 kg-mm 2} , whereas all of the golf club heads of the present invention have an MOI-Z of about 268. Those with MOI-Z of less than kg-mm ^{2 are shown.}

6 of the accompanying drawings establishes a graphical relationship between the MOI-Y of the golf club head and the newly introduced MOI-SA. As a closer examination of the graph shown in FIG. 6 will show, the present invention is all capable of achieving a higher-than-average MOI-Y while maintaining a relatively small MOI-SA. Similar to the previous plot, the circular point on the plot would represent the prior art golf club head, while the asterisk would represent the present invention. Therefore, it can be seen that the present design occupies a previously unachieved space described by the equation Y ≥ 0.52x + 147, which, when substituted into the context of the variables used in this plot, produces the following equation (4) can

식 (4)

Equation (4)

7 of the accompanying drawings establishes a graphical relationship between the now familiar MOI-SA and the MOI-X of the golf club head. As a closer examination of the graph shown in Figure 7 will show, the present invention is all capable of achieving higher-than-average MOI-X while maintaining relatively small MOI-SA. Thus, it can be seen that the present design occupies a previously unachieved space described by the equation Y ≥ 0.40x + 50, which, when substituted into the context of the variables used in this plot, produces the following equation (5) can

식 (5)

Equation (5)

8 of the accompanying drawings establishes a graphical relationship between the ratio of MOI-Z and CG-B/face width of a golf club head. All of the measurements for CG-B and face width can be found in the accompanying description of FIGS. 13 and 14 , as well as FIG. 3 of the accompanying drawings. The CG-B measurements are shown explicitly in FIG. 3 , while the face width referenced by the chart in FIG. 8 is shown as W2. A closer examination of the graph shown in FIG. 8 will indicate that the present invention is capable of achieving lower MOI-Z while keeping the CG-B/face width figure fairly constant above 0.4. CG-B/face width dictates the location of the center of gravity while maintaining a properly sized golf club head face.

In the chart shown in Fig. 8, the present invention occupies a previously unachieved space described by the equation Y ≤ 1000x - 150, which, when substituted into the context of the variables used in this plot, shows the following equation (6) It can be seen that it creates

식 (6)

Equation (6)

9 of the accompanying drawings establishes a graphical relationship between the ratio of MOI-Z and CG-B/head width of a golf club head. Both of the measurements for CG-B and head width can be found in the accompanying description of FIGS. 13 and 14 , as well as FIG. 3 of the accompanying drawings. The CG-B measurements are explicitly shown in FIG. 3 , while the head width referenced by the chart in FIG. 9 is shown as W1. A closer examination of the graph shown in FIG. 9 will indicate that the present invention is capable of achieving lower MOI-Z while keeping the CG-B/head width figure fairly constant above 0.34. CG-B/Head Width dictates the location of the center of gravity while maintaining an appropriately sized head width of the golf club head.

It can be seen from the chart shown in FIG. 9 that the present invention occupies a previously unachieved space depicted as a MOI-Z figure of less than ^{320 kg-mm 2 in combination with a CG-B/head width figure of greater than about 0.34.} have.

10 of the accompanying drawings establishes another graphic relationship of the performance of a golf club according to an embodiment of the present invention. More specifically, FIG. 10 of the accompanying drawings shows the relationship between MOI-X/MOI-Z and CG-Z (MOI-X is used interchangeably with Ixx, and MOI-Y is used interchangeably with Iyy and finally, MOI-Z is used interchangeably with Izz). Definitions and measurements for CG-Z of a golf club head can be found in the previous description with respect to FIG. 2 of the accompanying drawings, whereas the background information establishing MOI-X and MOI-Z has already been described above. The choice of plots for the X and Y axes may initially seem random to a person unfamiliar with golf club design, but a closer examination will reveal that the relationship created here is absolutely critical to the proper performance of the present invention. . On the Y-axis of the plot shown in Fig. 10, the ratio between MOI-X and MOI-Z is created here. This ratio generated represents the ability of the golf club head of the present invention to maximize the value of one variable (MOI-X) while minimizing the value of the other variable (MOI-Z); This is in common with the subject matter of the present invention. The MOI-Z used for the X-axis of the plot shown in FIG. 10 represents the CG position of the golf club head from the front to the rear of the golf club head, and it is desirable to keep it within the above-mentioned range.

Further examination of the plot shown in FIG. 10 will reveal that the present invention occupies a portion of the graph not previously achieved. This part of the graph is plotted from other prior art data points by the equation Y ≥ 6.7501x -99.3, which, when substituted into the context of the variables used in this plot, yields the following equation (7).

식 (7)

Equation (7)

11 of the accompanying drawings establishes another graphic relationship of a golf club according to an embodiment of the present invention by creating a relationship between MOI-Y/MOI-Z and CG-Z. Definitions and measurements for CG-Z of the golf club head can be found in the previous description with respect to FIG. 2 of the accompanying drawings, whereas the background information establishing MOI-Y and MOI-Z has already been described above. Similar to the previous description, the relationship between MOI-Y and MOI-Z is, as described above, with great forgiveness along the MOI-Y axis, while minimizing the MOI-Z of the golf club head to achieve higher ball velocities. represents the golf club's ability to achieve Similar to the previous description, FIG. 11 of the accompanying drawings shows that the present invention is capable of achieving previously unachieved performance characteristics. This part of the graph is plotted from other prior art data points by the equation Y ≥ 11.349x - 175.76, which, when substituted into the context of the variables used in this plot, yields the following equation (8).

식 (8)

Equation (8)

12 of the accompanying drawings establishes another graphic relationship of a golf club according to an embodiment of the present invention by generating a relationship between (MOI-X + MOI-Y)/MOI-Z and CG-Z. Definitions and measurements for CG-Z of a golf club head can be found in the previous description with respect to FIG. 2 of the accompanying drawings, whereas the background information establishing MOI-X, MOI-Y and MOI-Z has already been described above. became Similar to the previous description, the relationship between MOI-X, MOI-Y and MOI-Z is, as described above, MOI-X, while minimizing the MOI-Z of the golf club head to achieve higher ball velocity. and the ability of the golf club to achieve great forgiveness along both the MOI-Y axis. Similar to the previous description, FIG. 12 of the accompanying drawings shows that the present invention is capable of achieving previously unachieved performance characteristics. This part of the graph is plotted from other prior art data points by the equation Y ≥ 18.67x - 296.63, which, when substituted into the context of the variables used in this plot, yields the following equation (9).

식 (9)

Equation (9)

13-15 show different exploded and cross-sectional views of a golf club head and its internal components used to achieve the performance characteristics described above. 13 shows an exploded perspective view of an exemplary design of a golf club head 1300 capable of achieving the performance characteristics described above. Golf club head 1300 is constructed from the essential components already described in FIG. 1 in terms of front portion 1304 and rear portion 1306 . However, this exploded view of golf club head 1300 allows additional components to be shown in greater detail. More specifically, FIG. 13 shows that front portion 1302 is also constructed from a separate component referred to as striking face insert 1320 to form the striking portion of golf club head 1300 , as is often the case in golf club head construction in FIG. 13 . It shows what you can do. The rear portion 1306 of the golf club head 1300 is where it becomes more interesting. To achieve higher performance figures of higher MOI-Y, higher MOI-X and lower MOI-Z, a significant amount of mass is reallocated away from the perimeter and towards the center of the golf club head. To achieve this, the present invention utilizes four weighting members, all constructed from a high-density material with a higher density than the front portion 1302 or the rear portion 1306 . The four weighting members may be separated into a front sole weight 1322 , a front inner weight 1324 , a rear inner weight 1326 , and a rear inner weight 1328 , all of which are generally greater than 13 g/cc , more preferably greater than about 15 g/cc, and most preferably greater than about 17 g/cc.

It should be noted that in this exemplary embodiment of the present invention, all weighting members 1322 , 1324 , 1326 , 1328 are all formed of the same material having the same high density described above. However, in alternative embodiments of the present invention, different densities of tungsten may be used for different weighting members depending on design criteria and desired CG position, all without departing from the scope and content of the present invention.

14 of the accompanying drawings shows a cross-sectional view of a golf club head 1400 according to an exemplary embodiment of the present invention. A cross-sectional view of the golf club head taken across a horizontal plane that crosses the face of the golf club head 1400 is more clear in some of the relationships between the golf club head 1400 and the various weighting members 1422 , 1424 , 1426 , 1428 . make it possible to show In addition to weighting members, the cross-sectional view of golf club head 1400 shown in FIG. 14 also allows face center 1402 and CG location 1410 to be re-introduced when associated with weighting members. It can be seen from this figure that at least one weighting member is positioned in the heel to toe direction near the center of the golf club head and substantially in line with and behind the face center.

15 of the accompanying drawings illustrates a cross-sectional view of a golf club head 1500 according to an exemplary embodiment of the present invention taken along a vertical plane passing through the center of the face. This cross-sectional view of the golf club head 1500 shown in FIG. 15 provides slightly more information about the interactive relationships between the components. More specifically, FIG. 15 shows striking face insert 1520 positioned in front portion 1504 of golf club head 1500 . In addition to the above, FIG. 15 also shows that the front sole weight 1522 is positioned within a receptacle created in the front portion 1504 . Although not shown in this cross-sectional view of FIG. 15 , the front inner weight is also located on the front portion 1504 . A rear portion 1506 is attached to the rear portion of the front portion 1504 . The rear portion 1506 forms the aft body portion of the golf club head 1500 , and includes a rear inner weight 1526 and a rear sole weight 1528 . These weighting members, in combination with the unique materials used to form the front portion 1504 and the rear portion 1506 , allow the golf club head 1500 to achieve the inherent performance characteristics outlined previously.

16-20 illustrate various perspective and cross-sectional views of a golf club head 1600 according to an alternative embodiment of the present invention capable of achieving the performance goals described above. Similar to the previous embodiment illustrated by FIGS. 1-3 and 13-15 , many weighting members are positioned behind face center 1602 in a heel-to-toe orientation along the x-axis of golf club head 1600 . It is located near the center of to help minimize the MOI-Z of the golf club head 1600 .

More specifically, FIG. 16 of the accompanying drawings shows a perspective view of a golf club head 1600 according to this alternative embodiment of the present invention. Although not much can be seen from this perspective view of golf club head 1600, it serves as the basis for the subsequent discussion of this particular embodiment of the present invention. Finally, FIG. 16 provides a coordinate system 1601 for guiding the following description, similar to the previous figure showing a golf club head.

17 of the accompanying drawings shows a top view of a golf club head 1600 according to this alternative embodiment of the present invention. In this plan view, some familiar dimensions are introduced here again. First, the top view of golf club head 1600 shown in FIG. 17 allows the relationship between face center 1602 and CG 1610 to be shown in greater detail. When measured along the Z-axis, the measurement (CG-Z) is denoted as 1612. The position of the CG when referenced relative to the shaft axis 1615 creates another method of measuring the position of the CG along the Z-axis, called CG-C 1614 . Although the numerical ranges for the CG-Z 1612 and CG-C 1614 measurements are not significantly different from the previous descriptions, this embodiment of the present invention achieves these targets with slightly different configurations without the need for a multi-material chassis. It provides an alternative way to do this.

18 of the accompanying drawings shows a front view of a golf club head 1600 according to this alternative embodiment of the present invention. In this front view, other features used by the present embodiment to help achieve the performance criteria of the present invention can be seen. More specifically, FIG. 18 shows that in this embodiment of the present invention, in order to minimize the MOI-Z of the golf club head 1600 , the weight is reshaping the golf club at the toe portion of the golf club head 1600 . It is shown being removed from the distal end of the head 1600 . This reshaping of the contour at the toe of the golf club head 1600 not only removes weight from the distal end, but also enhances the face profile of the golf club head 1600 to create a uniquely performing golf club head 1600. create

In addition to illustrating this toe contour profiling, FIG. 18 also shows CG-B 1616 measurements with respect to shaft axis 1615 similar to the previous description. Once again, the CG-B 1616 measurement range is consistent with that mentioned in the previous description, and does not deviate much from the design intent of the present invention.

19 of the accompanying drawings shows a cutaway cross-sectional view of a golf club head 1600 according to this alternative embodiment of the present invention, taken along a horizontal plane. In this embodiment of the present invention, the overarching theme of placing weights along the central portion of the golf club head 1600 reappears. More specifically, golf club head 1600 further includes a front inner weight 1624 and a rear inner weight 1626 . However, these weights are prior to the present invention in that they can be made from the same material as the body portion of the golf club head 1600, such as titanium and can be cast directly into the body without departing from the scope and spirit of the present invention. different from the example of These weighting members 1624 , 1626 may also be made from a tungsten-type material having a total weight of 20 to 23 grams to further improve the performance of the golf club head 1600 without departing from the scope and spirit of the present invention.

20 of the accompanying drawings provides another cross-sectional cut-away view of a golf club head 1600 according to an alternative embodiment of the present invention, taken along a vertical plane. Once again, the measurements here are very similar to the previous description regarding the previous embodiment and the CG-Z 1612 values remain within the same range as the previous description. This cross-sectional cut-away view of golf club head 1600 taken along this line shows that the profiles and geometries of front inner weight 1624 and rear inner weight 1626 are in their relationship with the body portion of golf club head 1600 . to show more clearly.

21-25, golf club head 2000 has all of the mass and inertia characteristics described above. The golf club head 2000 also includes a frontal portion comprising a striking face 2001 having a face center FC, a crown on an upper portion of the golf club head 2000 and a sole on a lower portion of the golf club head 2000 . include The golf club head 2000 further includes a crown return 2002 and a soul return 2003 and a central body member 2004 as part of a front that is all formed of metal. The central body member 2004 is positioned near the center of the golf club head 2000 in a heel-to-toe orientation in line substantially along the z-axis, as described above, and plays golf from crown return 2002 and soul return 2003 . It extends to the rear edge 2005 of the club head. The golf club head 2000 is made of a non-metallic material and further comprises a heel body member 2006 coupled to the heel side of the central body member 2004 and the crown return 2002 and the sole return 2003 . Golf club head 2000 is made of a non-metallic material and also includes a toe body member 2007 coupled to a toe side of a central body member 2004 and a crown return 2002 and soul return 2003 . Heel body member 2006 and toe body member 2007 are essentially taco shell shaped and taco shaped in that they form part of the crown and part of the sole to have a c-shaped cross-section. Preferably, as described above, the metal part is formed of a standard titanium material such as TI-6-4, Ti-8-1-1, beta-titanium, etc. having a specific gravity of about 4 g/cc to 5 g/cc. can be Alternatively, the metal part may be formed from a standard steel material having a specific gravity of about 7 g/cc to 9 g/cc. Heel body member 2006 and toe body member 2007 are preferably standard composite fiber composite laminates, short fiber composites commonly referred to as fiber reinforced plastics (FRP), or U.S. Patent Publications, which are incorporated herein by reference in their entirety. formed of a composite material such as those disclosed in 2015-0360094. Alternatively, heel body member 2006 and toe body member 2007 are preferably combined with those disclosed in U.S. Application Serial No. 16/528,210, filed July 31, 2019, which is incorporated herein by reference in its entirety. Structural materials with a density less than 3.0 g/cc, such as thermoplastic materials, polyetherimide (PEI), polyether ether ketone (PEEK), polyphenylene sulfide (PPS), polysulfone (PSU), polyacrylether ketone (PEAK), polyetherketoneketone (PEKK) and polyvinyl chloride (PVC). The heel body member 2006 and the toe body member 2007 are preferably formed by compression molding, injection molding or 3D printing.

Golf club head 2000 also has a center of gravity (CG) (CG-z) located a distance rearward from the face center, a center of gravity (CG-y) located a vertical distance upward from the ground plane, perpendicular from the shaft axis. The center of gravity located at the distance (GC-SA), the center of gravity located at a horizontal distance from the face center toward the heel side (CG-x), and the center of gravity located at a predetermined distance rearwardly parallel to the z-axis from the shaft axis. (CG-C). As mentioned above, in the present invention, CG-z is generally from about 25 mm to about 40 mm, more preferably from about 26 mm to about 38 mm, most preferably from about 27 mm to about 36 mm, all was measured posteriorly from the face center (FC) along the z-axis shown by the coordinate system. In addition to the CG-z figure, an alternative measurement method is provided for measuring how far back the CG is positioned within the club head 2000 . In this alternative method, the CG is measured from the shaft axis SA, and this measurement indicates that the CG-C is generally from about 10 mm to about 30 mm, preferably from 10 mm to 25 mm, more preferably about 12 mm. to about 28 mm, more preferably from 12 mm to 23 mm, most preferably from about 14 mm to about 21 mm, all of which are in the z-axis direction depicted by the above coordinate system. was measured backward from the shaft axis SA along

As described above, for proper functionality of the golf club head 2000 of the present invention, whether measured from the face center (FC) or the shaft axis (SA), the strategic position of the posterior CG along the z-axis is It is important to be precise. If the CG position is too far forward, the golf club head 2000 may have low MOI-X and MOI-Y and low backspin when contacting the golf ball. However, in the alternative, if the CG position is too far back, the golf club head 2000 may generate too much spin to produce the desired result. Accordingly, the posterior CG position along the z-axis is important for the performance of the golf club head 2000 .

22 of the accompanying drawings shows another important CG measurement important to the proper functioning of the present invention. More specifically, FIG. 22 shows another measure of CG position from shaft axis SA along the x-y plane, in addition to illustrating all components of golf club head 2000 as described above. More specifically, FIG. 22 shows a CG measurement perpendicular to the shaft axis SA along this x-y plane, referred to as CG-B for this application. The CG-B of the golf club head 2000 may generally be from about 32 mm to about 39 mm, more preferably from about 33 mm to about 38 mm, and most preferably from about 35 mm.

As shown in FIG. 22 , golf club head 2000 has a central support member 2010 such as a wall member 2010 coupled to the crown portion of the central body member 2004 and the sole portion of the central body member 2004 . ) may be further included. The wall member 2010 preferably has a thickness t of 0.2 mm to 5 mm, more preferably about 0.4 mm to 2 mm.

23 , the central body member 2004 preferably combines the heel body member 2006 and the toe body member 2007 with the central body member 2004 and the crown return 2002 and the sole return 2003 . ) have a heel side circumferential attachment edge 2011 and a toe side circumferential attachment edge 2012 for engaging respectively. The heel side circumferential attachment edge 2011 and the toe side circumferential attachment edge 2012 are preferably from the proximal of the crown return 2002 and the sole return 2003 to the rear edge 2005 of the golf club head 2000 . extended to

As shown in FIG. 24 , the golf club head 2000 may further include at least one weight member 2008 or 2009 , and more preferably include two weight members 2008 and 2009 . A first weight member 2008 is positioned in the sole portion of the club head forward near the striking face 2001, and the second weight member 2009 is positioned in the soul portion of the club head rearward near the rear edge 2005. do. At least one of the weight members 2008, 2009 may have a material density generally greater than 13 g/cc, more preferably greater than about 15 g/cc. The weight members 2008 and 2009 preferably have a mass of from about 0 grams to 50 grams, more preferably from about 3 grams to 35 grams, and most preferably from 5 grams to 25 grams. In an embodiment of the present invention, the first weight member 2008 has a mass that is at least twice that of the second weight member 2009 . In another embodiment of the present invention, the first weight member 2008 has a mass less than half that of the second weight member 2009 . More preferably, the weight members 2008, 2009 are interchangeable so that the CG can be adjusted forward and backward to control the launch and spin characteristics of the club head. Moreover, the center of the first weight member 2008 is preferably located less than 30 mm from the striking face 2001 along the z-axis and the center of the second weight member 2009 is preferably a rear edge along the z-axis (2005) positioned less than 20 mm, allowing interchangeable weights to have the greatest impact on the spin and launch characteristics of the club head.

As shown in FIG. 25 in one embodiment of the present invention, the central support member or wall member 2010 is coupled to the crown portion of the central body member 2004 and the sole portion of the central body member 2004 and is coupled to the first and the second weight member 2008 , 2009 . The central support member 2010 preferably has a maximum height H parallel to the y-axis and a maximum depth D parallel to the z-axis. The depth D is preferably greater than the maximum height H. As also shown in FIG. 25 , a heel side circumferential attachment edge 2011 and a toe side circumferential attachment edge for coupling the heel body member 2006 and the toe body member 2007 to the central body member 2004 . 2012 may include a plurality of recesses or holes 2013 through which adhesive may enter the components and better lock them together. Alternatively, the heel side circumferential attachment edge 2011 and the toe side circumferential attachment edge 2012 can be connected to the heel body member 2006 and the toe body such that the adhesive can fill the gap and create a stronger bond therebetween. It may have a plurality of protrusions on the outer surface to create a gap between the member 2007 and the central body member 2004 .

In another embodiment of the present invention, the central support member 2010 of the golf club head includes a plurality of strut members 2014, extending between the two weight members 2008, 2009 from the crown to the sole of the central body member 2004; 2015, 2016, 2017, 2018 and 2019). Again, the central support member 2010 preferably has a maximum height H parallel to the y-axis and a maximum depth D parallel to the z-axis. The depth D is preferably greater than the maximum height H. Preferably, a first angled strut member 2014 extends from the crown portion of the central body member 2004 to the sole and the second angled strut member 2015 extends from the sole portion of the central body member 2004 to the crown. , and the first and second angled strut members 2014 , 2015 preferably intersect each other. Preferably, the first and second angled strut members 2014, 2015 extend at an angle α from 15 degrees to 75 degrees from the y-axis and an angle β from 15 degrees to 75 degrees from the z-axis. More preferably, the first and second angled strut members 2014 and 2015 extend at an angle α from 15 degrees to 45 degrees from the y-axis and an angle β from 45 degrees to 75 degrees from the z-axis. . The golf club head 2000 has a third angled strut member 2016 extending from the crown portion of the central body member 2004 to the sole and a fourth angled strut member 2016 extending from the sole portion of the central body member 2004 to the crown. It may further include a member 2017, wherein the third and fourth angled strut members intersect each other. The third and fourth angled strut members also extend from both the y-axis and the z-axis at angles α and β of 15 degrees to 75 degrees, respectively. Preferably, the third angled strut member 2016 is coupled to the first angled strut member 2014 at the crown, and the fourth angled strut member 2017 is coupled to the second angled strut member 2015 at the sole. is coupled to Furthermore, preferably, the third angled strut member 2016 is substantially parallel to the second angled strut member 2015 and the fourth angled strut member 2017 is the first angled strut member 2014. is substantially parallel to Golf club head 2000 extends proximate to first weight member 2008 and extends perpendicularly between first angled strut member 2014 and second angled strut member 2015, substantially parallel to the y-axis. It may further include a vertical strut member 2018. Even more preferably, the golf club head 2000 is positioned adjacent the second weight member 2009 and vertically between the fourth angled strut member 2017 and the third angled strut member 2016 along the y-axis. It may further include a second vertical strut member 2019 extending substantially parallel to the .

An advantage of a central support member 2010 in the form of a wall member 2010 or an angled strut member 2014, 2015, 2016, 2017 is that the crown portion of the central body member 2004 is in the y-axis of the central body member 2004 ) and also prevent these parts from shearing against each other in the z-axis.

An advantage of multiple weight members 2008 and 2009 is that the weight members can each have the same mass, for example 10 to 15 grams each, so that the CG of the club head 2000 is in a neutral position. However, the weight members 2008 and 2009 may also be constructed with a heavy weight of, for example, greater than 15 grams, and a light weight of less than 10 grams, allowing the CG to be moved forward or backward depending on the placement of the weight. . With the heavy weight placed on the aft weight member 2009, the MOI-Y is increased and is preferably greater than ^{about 450 kg-mm 2 .} Thus, in a preferred golf club head 2000, MOI-Y is approximately twice or greater than MOI-Z. Conversely, when a heavy weight is on the front weight member 2008, the CG-C can be significantly reduced. For example, a preferred golf club head 2000 may have a GC-C between 14 mm and 21 mm.

The advantages of the club head 2000 described above can also be applied to fairway woods and hybrids. It is understood that, in these examples, the numerical values for the club properties will be lower and the metal will generally be steels and high strength steels known in the art. However, the configuration of the golf club head 2000 can be easily adapted to these smaller heads.

27-29, golf club head 2000 has all of the mass and inertia characteristics described above. The golf club head 2000 also includes a variable thickness striking face 2001 having a maximum thickness at the face center FC, a crown on the upper portion of the golf club head 2000 and a sole on the lower portion of the golf club head 2000 . It includes a front part comprising a. The golf club head 2000 further includes a crown return 2002 and a soul return 2003 and a central body member 2004 adjacent the striking face 2001 as described above, all formed of metal. The central body member 2004 is positioned near the center of the golf club head 2000 in a heel-to-toe orientation in line substantially along the z-axis, as described above, and plays golf from crown return 2002 and soul return 2003 . It extends to the rear edge 2005 of the club head 2000 . As described above, golf club head 2000 is made of a non-metallic material and is made of a non-metallic material and a heel body member 2006 coupled to the heel side of the central body member 2004 along the heel edge 2011 and the toe edge. and a tow body member 2007 coupled to the tow side of the central body member 2004 along 2012 . The central body member 2004 may include a plurality of protrusions 2013a that create an adhesive filled gap and better lock the components together. Heel body member 2006 and toe body member 2007 are essentially taco shell shaped and taco shaped in that they form part of the crown and part of the sole to have a c-shaped cross-section. Preferably, as described above, the metal part is formed of a standard titanium material such as TI-6-4, Ti-8-1-1, beta-titanium, etc. having a specific gravity of about 4 g/cc to 5 g/cc. can be Heel body member 2006 and toe body member 2007 are preferably standard composite fiber composite laminates, short fiber composites commonly referred to as fiber reinforced plastics (FRP), or U.S. Patent Publications, which are incorporated herein by reference in their entirety. formed of a composite material such as those disclosed in 2015-0360094. Alternatively, heel body member 2006 and toe body member 2007 are preferably combined with those disclosed in U.S. Application Serial No. 16/528,210, filed July 31, 2019, which is incorporated herein by reference in its entirety. Thermoplastic materials such as polyetherimide (PEI), polyether ether ketone (PEEK), polyphenylene sulfide (PPS), polysulfone (PSU), polyacrylether ketone (PEAK), polyether ketone ketone (PEKK) and poly It is formed from vinyl chloride (PVC). The heel body member 2006 and the toe body member 2007 are preferably formed by compression molding, injection molding or 3D printing.

In the most preferred embodiment, the heel body member 2006 and the toe body member 2007 have high crystallinity PPS, i.e., the degree of crystallinity as measured using differential scanning calorimetry (DSC), preferably at a heating rate of 20° C./min. is formed from PPS greater than 40%, more preferably greater than about 50%. The percent crystallinity can be calculated using the formula:

%Crystallinity = ΔH _sample /ΔH _reference ×100

where: ΔH _sample is the enthalpy of melting a sample with an unknown percentage _{of crystallinity and ΔH reference} is the enthalpy of melting a sample with a known crystallinity. For PPS, 76.5 J/g may be used as the _{ΔH reference.}

In order to increase the crystallinity level of the PPS, it is recommended that the material be injection molded in a mold at a temperature above 115°C, particularly in a mold at about 125°C to 135°C. In a most preferred embodiment, the PPS crystallinity is between about 50% and 70%. The material preferably has a uniform thickness of about 0.5 mm to about 2 mm. However, in one embodiment, the toe body member 2007 has a thickness that is less than the thickness of the heel body member 2006 . In another embodiment, toe body member 2007 and heel body member 2006 vary such that they are thinnest in the crown portion and thicker in the sole portion. In this embodiment, the crown portion of the toe body member 2007 and the heel body member 2006 preferably has a thickness of about 0.5 mm to 1 mm, and the sole of the toe body member 2007 and the heel body member 2006 is The section is about 1 mm to 2 mm thick.

Golf club head 2000 also has a center of gravity (CG) (CG-z) located a distance rearward from the face center, a center of gravity (CG-y) located a vertical distance upward from the ground plane, perpendicular from the shaft axis. The center of gravity located at the distance (GC-SA), the center of gravity located at a horizontal distance from the face center toward the heel side (CG-x), and the center of gravity located at a predetermined distance rearwardly parallel to the z-axis from the shaft axis. (CG-C). As mentioned above, in the present invention, CG-z is generally from about 25 mm to about 40 mm, more preferably from about 26 mm to about 38 mm, most preferably from about 27 mm to about 36 mm, all was measured posteriorly from the face center (FC) along the z-axis shown by the coordinate system. In addition to the CG-z figure, an alternative measurement method is provided for measuring how far back the CG is positioned within the club head 2000 . In this alternative method, the CG is measured from the shaft axis (SA), which measurement indicates that the CG-C is generally from about 10 mm to about 25 mm, more preferably from about 12 mm to about 23 mm, most preferably from about 14 mm to about 21 mm, all of which are shown as measured posteriorly from the shaft axis SA along the z-axis shown by the coordinate system.

As described above, for proper functionality of the golf club head 2000 of the present invention, whether measured from the face center (FC) or the shaft axis (SA), the strategic positioning of the CG position of the rear along the z-axis It is important that is accurate. If the CG position is too far forward, the golf club head 2000 may have low MOI-X and MOI-Y and low backspin when contacting the golf ball. However, in the alternative, if the CG position is too far back, the golf club head 2000 may generate too much spin to produce the desired result. Accordingly, the posterior CG position along the z-axis is important for the performance of the golf club head 2000 .

29 and 31 , the weight member 2008 has a smaller mass than the weight member 2009 and is preferably made from steel (or at least a material having a density lower than that of the weight member 2009 ). manufactured. A first weight member 2008 is positioned in the forward portion of the soul return 2003 near the striking face 2001, and the second weight member 2009 aft golf club head 2000 near the rear edge 2005. It may be located in the soul part of At least one of the weight members 2008, 2009 may have a material density of generally greater than 13 g/cc, more preferably greater than about 15 g/cc, and most preferably greater than about 17 g/cc. Preferably, at least one of the weight members 2008, 2009 may have a material density generally greater than 2 g/cc and less than about 9 g/cc, most preferably from about 4 g/cc to about 8 g/cc. have. The weight members 2008, 2009 preferably have a mass of about 0 grams to 50 grams, more preferably about 5 grams to 25 grams. In an embodiment of the present invention, the first weight member 2008 has a mass that is at least twice that of the second weight member 2009 . In another embodiment of the present invention, the first weight member 2008 has a mass less than half that of the second weight member 2009 . More preferably, the weight members 2008, 2009 are sample shapes such that they are interchangeable such that the CG of the golf club head 2000 can be adjusted forward and backward to control the launch and spin characteristics of the club head. and volume. Moreover, the center of the first weight member 2008 is preferably located less than 30 mm from the striking face 2001 along the z-axis direction and the center of the second weight member 2009 is preferably located in the z-axis direction. Located less than 20 mm from the rear edge 2005 along More preferably, the center of the first weight member 2008 is preferably located less than 25 mm from the striking face 2001 along the z-axis direction and the center of the second weight member 2009 is preferably z - located less than 20 mm from the rear edge 2005 along the axial direction.

32 , the first weight member 2008 is releasably coupled to the soul return 2003 portion of the golf club head 2000 , preferably by a fastener 2020 . The first weight member 2008 may have a material density generally greater than 4 g/cc, more preferably greater than about 7 g/cc, and most preferably from about 7 g/cc to 8 g/cc. The first weight member preferably has a light side 2021 and a heavy side 2022. The heavy side 2022 is preferably a side that is substantially solid and is identified with a marking, such as having a dot as shown in FIGS. 29 and 31 . In a preferred embodiment, the first weight member 2008 has a hollow portion 2023 that forms the light side 2021 of the weight member 2008 .

33 , the second weight member 2009 is also releasably coupled to the sole portion of the central body member 2004 portion of the golf club head 2000 preferably by a fastener 2025 . do. The second weight member 2009 may have a material density of generally greater than 13 g/cc, more preferably greater than about 15 g/cc, and most preferably greater than about 17 g/cc. The second weight member 2009 preferably has a light side 2026 and a heavy side 2027 . The heavy side 2027 is preferably a side that is substantially solid and is identified with an indicia, such as having a dot as shown in FIGS. 29 and 31 . In a preferred embodiment, the weight member 2009 has a hollow portion 2028 that forms the light side 2026 of the second weight member 2009 .

More preferably, at least one or both of the weight members 2008 or 2009 have a light side 2021 , 2026 comprising a hollow portion 2023 , 2028 and a substantially solid or heavy side mass than the light side mass. It consists of heavy sides 2022 and 2027 that are solid enough to be large. Alternatively, at least one or both of the weight members 2008 or 2009 may have light sides 2021, 2026 comprising hollow portions 2023, 2028 that may be filled with a material having a density less than 4 g/cc and It consists of heavy sides 2022, 2027, which are hollow parts filled with a material having a density greater than about 7 g/cc, more preferably greater than about 15 g/cc. 29 and 31 , the weight member 2008 has a smaller mass than the weight member 2009 and is preferably made from steel (or at least a material having a density lower than that of the weight member 2009 ). manufactured. More preferably, the first weight member 2008 has a mass of about 7 g to 14 g, and the second weight member has a mass of about 15 g to 22 g. Most preferably, the first weight member 2008 and the second weight member 2009 are shown in Figures 29 and 29 to move the CG-C by approximately 1 mm to 5 mm, most preferably about 2.5 mm to 3.5 mm. 31 can be interchanged in forward and aft positions. In a most preferred embodiment, CG-C may be between about 14 mm and 21 mm when first weight member 2008 is in a trailing position adjacent to rear edge 2005, and CG-C is first weight member 2008 ) may be between about 22 mm and 30 mm when in the forward position adjacent the striking face 2001 . Further, the first weight member 2008 and the second weight member 2009 preferably have approximately the same mass difference between the light side 2021 and 2026 and the heavy side 2022 and 2027 . Preferably, the mass difference between the light sides 2021, 2026 and the heavy sides 2022, 2027 is between about 4 g and 8 g. Thus, if one of the weight members has a side that is heavy towards the heel in the x-axis direction and the other side has a side that is heavy towards the toe in the x-axis direction, then the CG of the golf club head 2000 is shown in FIG. may be neutral in the x-axis direction as shown. However, if the weight member has both of its heavy sides 2022, 2027 towards the toe or heel in the x-axis direction, then the CG can be moved away from the neutral position along the x-axis direction towards the toe or heel, respectively. have. Preferably, the golf club head CG can be moved from a neutral position towards the toe or heel at least 0.5 mm, more preferably between about 0.7 mm and 1.5 mm. 31 , both the first weight member 2008 and the second weight member 2009 have the golf club head CG toward the toe by about 1 mm in the neutral position GC-n. It has heavy sides 2022, 2027 towards the tow in the x-axis direction to be moved. These weight members can all be rotated about the fastener such that the CG is moved toward the heel by about 1 mm from the neutral position (CG-n) and 2 mm from the distal toe CG position, as shown in FIG. have.

34-37 show different perspective and cross-sectional views of a golf club head and its internal components used to achieve the performance characteristics described above. 34 shows a perspective view of an exemplary design of a golf club head 3000 capable of achieving the performance characteristics described above, particularly with respect to the embodiments of FIGS. 1-3 and 13-15. The golf club head 3000 is of the essential configuration described above in FIGS. composed of elements. To achieve the higher performance figures of higher MOI-Y, higher MOI-X and lower MOI-Z, a significant amount of mass is allocated towards the center of the golf club head away from the perimeter. To achieve this, the present invention utilizes two weighting members preferably composed of a high-density material having a higher density than the front portions 3001 , 3002 , 3003 and the rear portion 3004 . Preferably, as described above, the front face portions 3001 , 3002 , 3003 are TI-6-4, Ti-8-1-1, beta-titanium having a density of about 4 g/cc to 5 g/cc. It may be formed from standard titanium materials such as, etc. The backing 3004 is preferably a standard composite fiber composite laminate, a short fiber composite commonly referred to as fiber reinforced plastic (FRP), or those disclosed in US Patent Publication No. 2015-0360094, which is incorporated herein by reference in its entirety. formed from the same composite material. Alternatively, the backside 3004 is preferably at 3.0 g/cc, such as a thermoplastic material, such as those disclosed in U.S. Application Serial No. 16/528,210, filed July 31, 2019, which is incorporated herein by reference in its entirety. Structural materials having a density of less than, polyetherimide (PEI), polyether ether ketone (PEEK), polyphenylene sulfide (PPS), polysulfone (PSU), polyacrylether ketone (PEAK), polyether ketone ketone ( PEKK) and polyvinyl chloride (PVC). The back side 3004 is preferably formed by compression molding, injection molding or 3D printing. Additionally, the golf club head 3000 includes a sole plate member 3006 secured to the outer surface of the rear portion 3004 . In a preferred embodiment, the soul plate member 3006 is also made from standard titanium materials such as TI-6-4, Ti-8-1-1, beta-titanium, etc. having a density of about 4 g/cc to 5 g/cc. is formed In another preferred embodiment, the soul plate member 3006 is formed from stainless steel or similar material having a density of about 7 g/cc to 8 g/cc.

Golf club head 3000 also includes weight members 3008 and 3009 . In a first embodiment, the weight members 3008 and 3009 may each have the same mass of, for example, 10 to 15 grams each, such that the CG of the club head 3000 is in a neutral position along the z-axis direction. However, the weight members 3008 , 3009 may also be configured with a heavy weight of, for example, greater than 15 grams, and a light weight of less than 10 grams, such that the CG is forward or backward along the z-axis direction depending on the placement of the weights. can be moved to With the heavy weight positioned on the aft weight member 3009, the MOI-Y is increased and is preferably greater than ^{about 450 kg-mm 2 .} Thus, in a preferred golf club head 3000, MOI-Y is approximately twice or greater than MOI-Z. Conversely, when a heavy weight is on the front weight member 3008, the CG-C can be significantly reduced. For example, a preferred golf club head 3000 may have a GC-C between 14 mm and 21 mm.

Referring to FIG. 35 , the golf club head 3000 further includes an inner rib member 3010 positioned on the front portion. Rib member 3010 is preferably located at or near the overlap junction of front and back portions 3004 . Preferably, the depth DD of the golf club head from the leading edge LE to the trailing edge 3005 is between 105 mm and 125 mm, more preferably between about 118 mm and 122 mm. The distance (DCR) of the crown return from the leading edge to the position where the crown return 3002 abuts the rear portion 3004 is preferably about 20 mm and 35 mm, more preferably about 30 mm to 34 mm. The distance (DSR) of the sole return from the leading edge to the rear end of the sole return 3003 is preferably between about 24 mm and 44 mm, more preferably between about 35 mm and 42 mm. Accordingly, the rib member 3010 is preferably positioned at a distance from the leading edge between the DCR and DSR or between 20 mm and 44 mm. Most preferably, the rib member 3010 has a distance from the leading edge to the crown portion of the rib member 3010 (at the center of the crown in the heel to toe direction, at the back from the face center) (DRC) from the leading edge to the rib It is angled to be less than the distance to the sole portion of the member 3010 (at the center of the sole in the heel-to-toe direction, and behind the face center) (DRS). More preferably, the DRC is preferably 22 mm to 33 mm, and the DRS is 26 mm to 42 mm and is at least 10% larger than the DRC. Thus, the rib member 3010 forms an _{angle α R} of about 2° to 10° from the vertical plane in DRC to a point on the sole in DRS. The rib member 3010 also preferably has a varying rib height RH (the height of the rib member from the inner surface of the front portion) from the center of the crown to the center of the sole and at the heel and toe. Most preferably, the rib height (RH) is between about 2 mm and 8 mm, greatest at the sole center and shortest at the heel and toe. Most preferably, the rib member 3010 has a rib height (RH) of about 5 mm at the center of the sole, 4 mm at the center of the crown, and between 3 mm and 3.5 mm at the heel and toe.

The center of the first weight member 3008 is preferably located at a distance DW1 from the leading edge LE of about 15 mm to 25 mm. The center of the second weight member 3009 is preferably located at a distance DW2 from the leading edge LE of about 80 mm to 115 mm.

36 and 37 , the second weight member 3009 is shown in an enlarged cross-sectional view. The second weight member 3009 is comprised of an inner weight member 3021 and an outer weight member 3022 , with fasteners 3020 coupling the members together to the rear portion 3004 . The first weight member 3008 will preferably have a similar configuration but will be secured around the front portion of the soul return 3003 . Most preferably, the first weight member 3008 and the second weight member 3009 have a similarly shaped outer weight member 3022 that is interchangeable. In this embodiment, the inner weight member 3021 and the outer weight member also cause the rear portion 3004 and the soul plate member 3006 to be compressed between the inner weight member 3021 and the outer weight member 3022, thereby making the soul plate member (3006) is fixed to the rear part (3004). In the weight embodiment shown in FIG. 37 , the sole plate member 3006 and the inner weight member 3021 are also coupled to the backside portion 3004 before the outer weight member 3022 is engaged by the fastener 3020 . The thread is formed so that it can be

38-41, another embodiment of a rear portion 4004 is shown having a pinch weight member 4009 secured near the rear edge 4005 used to achieve the performance characteristics described above. The pinch weight member 4009 is similar to the second weight member 3009 described above. The pinch weight member 4009 is comprised of an inner weight member 4021 and an outer weight member 4022 , with fasteners 4020 joining the members together to compress the rear portion 4004 . A first weight member, not shown, will preferably have a similar configuration but will also be secured around a front face, not shown. In the weight embodiment shown in FIG. 41 , the sole portion 4012 is such that the outer weight member 4022 will be coupled to the back portion 4004 before they are coupled to the weight retention pocket 4023 by the fastener 4020 . It is compressed between the internal weight member 4021 and the weight retaining pocket 4023 which are also threaded to allow the The outer surface of the weight retaining pocket 4023 is cylindrical with a tread and the inner surface is preferably a hexagon or other polygonal and outer weight member 4022 such that the outer weight member 4022 cannot rotate within the weight retaining pocket 4023. ) to match the shape of

In a preferred embodiment, the rear portion 4004 is formed from a crown portion 4011 and a sole portion 4012 that may be engaged by a joint connector 4013 . The crown portion 4011 and the sole portion 4012 are preferably injection molded separately and then joined by a joint connector 4013 . The material for the crown portion 4011 and the sole portion 4012 is preferably the same, and the material for the joint connector is preferably the same or at least compatible so as to easily engage the crown portion 4011 and the sole portion 4012 . will do

In the most preferred embodiment, the backside 4004 has a high crystallinity PPS, preferably greater than 40% crystallinity, more preferably as measured using differential scanning calorimetry (DSC) at a heating rate of 20°C/min. It is formed from greater than about 50% PPS. In order to increase the crystallinity level of the PPS, it is recommended that the material be injection molded in a mold at a temperature above 115°C, particularly in a mold at about 125°C to 135°C. In a most preferred embodiment, the PPS crystallinity is between about 50% and 70%. Preferably, the PPS may be formed without any fillers or may contain fillers such as glass fillers. Glass Filler PPS In embodiments, the PPS preferably has greater than about 20%, more preferably about 20% to 50%, and most preferably about 30% to 50% glass filler. The material preferably has a uniform thickness of about 0.5 mm to about 2 mm. However, in one embodiment, the heel side 4007 has a thickness that is less than the thickness of the toe side 4006 . In another embodiment, the thickness varies so that it is thinnest in the crown portion 4011 and thicker in the sole portion 4012 . In this embodiment, the crown portion 4011 preferably has a thickness of about 0.5 mm to 1 mm and the thickness of the sole portion 4012 is about 1 mm to 2 mm.

42 illustrates a perspective view of a golf club head that achieves the performance characteristics described above. The golf club head 5000 is particularly capable of achieving the performance characteristics described above with respect to the embodiments of FIGS. 1-3, 13-15 and 34-36. The golf club head 5000 is described above in FIGS. 1 , 13 and 34 in terms of a rear portion 5004 consisting of a front and aft body having a striking face 5001 , a crown return 5002 and a soul return 5003 . made up of essential components. To achieve the higher performance figures of higher MOI-Y, higher MOI-X and lower MOI-Z, a significant amount of mass is allocated towards the center of the golf club head away from the perimeter. To achieve this, the present invention utilizes two weighting members preferably constructed of a high-density material having a higher density than the front portions 5001 , 5002 , 5003 and the rear portion 5004 . Preferably, as described above, the fronts 5001 , 5002 , 5003 are TI-6-4, Ti-8-1-1, beta-titanium having a density of about 4 g/cc to 5 g/cc. It may be formed from standard titanium materials such as, etc. The backing 5004 is preferably a standard composite fiber composite laminate, a short fiber composite commonly referred to as fiber reinforced plastic (FRP), or those disclosed in U.S. Patent Publication No. 2015-0360094, which is incorporated herein by reference in its entirety. formed from the same composite material. Alternatively, the backside 5004 is preferably at 3.0 g/cc, such as a thermoplastic material, such as those disclosed in U.S. Application Serial No. 16/528,210, filed July 31, 2019, which is incorporated herein by reference in its entirety. Structural materials having a density of less than, polyetherimide (PEI), polyether ether ketone (PEEK), polyphenylene sulfide (PPS), polysulfone (PSU), polyacrylether ketone (PEAK), polyether ketone ketone ( PEKK) and polyvinyl chloride (PVC) and composites comprising them. Alternatively, the backside 5004 is formed of a standard titanium material, such as TI-6-4, Ti-8-1-1, beta-titanium, preferably having a density of about 4 g/cc to 5 g/cc. and is integrally formed with the crown return 5002 and the soul return 5003 .

In the most preferred embodiment, the backside 5004 has a high crystallinity PPS, i.e., a crystallinity of greater than 40%, more preferably as measured using differential scanning calorimetry (DSC) at a heating rate of preferably 20°C/min. It is formed from greater than about 50% PPS. In order to increase the crystallinity level of the PPS, it is recommended that the material be injection molded in a mold at a temperature above 115°C, particularly in a mold at about 125°C to 135°C. In a most preferred embodiment, the PPS crystallinity is between about 50% and 70%. Preferably, the PPS may be formed without any fillers or may contain fillers such as glass fillers. Glass Filler PPS In embodiments, the PPS preferably has greater than about 20%, more preferably about 20% to 50%, and most preferably about 30% to 50% glass filler. The material preferably has a uniform thickness of about 0.5 mm to about 2 mm. However, in one embodiment, the heel side 5007 has a thickness that is less than the thickness of the toe side 5006 . In another embodiment, the thickness varies so that it is thinnest in the crown portion 5011 and thicker in the sole portion 5012 . In this embodiment, the crown portion 5011 preferably has a thickness of about 0.5 mm to 1 mm and the thickness of the sole portion 5012 is about 1 mm to 2 mm.

The back side 5004 is preferably formed by compression molding, injection molding or 3D printing. Additionally, golf club head 5000 may include a sole plate member secured to the outer surface of rear portion 5004, as described above.

In a preferred embodiment, golf club head 5000 also includes weighting members 5008 and 5009. Weighting members 5008 , 5009 may be secured to golf club head 5000 using fasteners and/or adhesive tape such as those available from 3M. One of the weighting members 5008 is in a heel to toe orientation at the sole portion 5012 and near the striking face 5001 that is within 20 mm of the striking face 5001 substantially in line along the z-axis with the face center. It is located near the center of the golf club head. A second weighting member 5009 is positioned near the center of the golf club head in a heel-to-toe orientation near the rear edge 5005 that is within 20 mm of the rear edge 5005 substantially in line along the z-axis with the face center. is located in The weighting members 5008 and 5009 may each have the same mass, for example of 4 to 15 grams each, such that the CG of the club head 5000 is in a neutral position along the z-axis direction. However, the weighting members 5008 , 5009 may also be configured with a heavy weight of, for example, greater than 15 grams, and a light weight of less than 10 grams, such that the CG is forward or backward along the z-axis direction depending on the placement of the weights. can be moved to With the heavy weight positioned on the aft weighting member 5009, the MOI-Y is increased and is preferably greater than ^{about 450 kg-mm 2 .} Thus, in a preferred golf club head 5000, MOI-Y is approximately twice or greater than MOI-Z. Conversely, when a heavy weighting member is on the front weighting member 5008, the CG-C can be significantly reduced. For example, a preferred golf club head 5000 may have a GC-C between 14 mm and 21 mm.

More preferably, at least one or both of the weighting members 5008 or 5009 have a light side mass 5021 , 5026 which may comprise a hollow portion or a lighter material and a substantially solid or heavy side mass of the light side mass. It is made up of heavier sides 5022 and 5027 that are made of a higher specific gravity material to be larger. In one embodiment, the weighting members 5008 and/or 5009 have light sides 5021, 5026 comprised of a material having a density of 4 g/cc or less and greater than about 7 g/cc and more preferably about 15 g/cc. It consists of heavy sides 5022 and 5027 made of a material having a density greater than or equal to cc. As shown in FIG. 42 , the weighting member 5008 has a smaller mass than the weighting member 5009 , but these weights are interchangeable and can be switched. It is preferred that the weighting member 5008 is formed from a material having a lower density than the material of the weighting member 5009 composed of aluminum or a thermoplastic material and steel, or at least preferably steel and tungsten. More preferably, the first weighting member 5008 has a mass of about 7 g to 14 g, and the second weighting member 5009 has a mass of about 15 g to 22 g. Most preferably, the first weighting member 5008 and the second weighting member 5009 are in forward and aft positions to move the CG-C by approximately 1 mm to 5 mm, most preferably about 2.5 mm to 3.5 mm. can be interchanged with In a most preferred embodiment, the CG-C may be between about 14 mm and 21 mm when the first weighting member 5008 is in the trailing position adjacent the trailing edge 5005, and the CG-C is the first weighting member 5008 ) may be between about 22 mm and 30 mm when in a forward position adjacent to striking face 5001 . Also, the first weighting member 5008 and the second weighting member 5009 preferably have approximately the same mass difference between the light side 5021 , 5026 and the heavy side 5022 , 5027 . Preferably, the mass difference between the light side 5021 , 5026 and the heavy side 5022 , 5027 is about 4 g to 8 g. Thus, if one of the weighting members has a side that is heavy towards the heel in the x-axis direction and the other side has a side that is heavy toward the toe in the x-axis direction, then the CG of the golf club head 5000 is as shown in FIG. 42 . may be neutral in the x-axis direction as shown. However, if the weighting member has both of its heavy sides 5022 and 5027 towards the toe or heel in the x-axis direction, then the CG can be moved away from the neutral position along the x-axis direction towards the toe or heel, respectively. have. Preferably, the golf club head CG can be moved from a neutral position towards the toe or heel at least 0.4 mm, more preferably between about 0.4 mm and 1.5 mm.

Another aspect of the present invention is that the weighting member 5008 or 5009 is attached to the golf club head at different angles as shown in FIG. 43 . More specifically, the weighting member 5008 is coupled to the sole portion 5012 such that it is relatively parallel to the horizontal plane when the club is in the address position. Or, put another way, fastener 5020 for weighting member 5008 extends vertically, substantially in the y-direction, into golf club head 5000 to secure weighting member 5008 to sole portion 5012 . . Conversely, the weighting member 5009 of this embodiment has a rear edge 5005 that is a trailing wall that is essentially in a vertical plane, even though the aft wall is curved in the x-direction and has a height H of about 0.25 inches to 1 inch. is coupled to Or, put another way, the fastener 5025 coupling the weighting member 5009 to the rear edge 5005 extends horizontally, substantially along the z-direction, into the golf club head 5000 . The angle β formed between the lines extending from the fasteners 5020 , 5025 into the club head, viewed in the x-direction, is preferably greater than 60 degrees, more preferably between about 80 degrees and 100 degrees.

Except for operational examples, or unless explicitly specified otherwise, all numerical values, such as those for amounts of material, moment of inertia, center of gravity position, loft, draft angle, various performance ratios, and the like, in the foregoing portions of the specification Ranges, amounts, values, and percentages may be read as if preceded by the word "about", although the term "about" may not appear explicitly in the value, amount or range. Accordingly, unless indicated to the contrary, the numerical parameters set forth in the foregoing description and appended claims are approximations that may vary depending upon the desired characteristics sought to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the principle of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.

Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the present invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective test measurements. Moreover, when numerical ranges of various ranges are described herein, it is contemplated that any combination of these values inclusive of the recited values may be used.

Of course, it should be understood that the above content relates to exemplary embodiments of the present invention, and that modifications may be made without departing from the spirit and scope of the present invention as described in the claims below.

Claims (11)

A golf club comprising a golf club head, a shaft and a grip, the shaft having a shaft axis coupled to the golf club head at a first end of the shaft, the grip coupled to the shaft at a second end of the shaft, the golf club head Is
a metal front portion comprising a striking face having a face center positioned on the front portion of the golf club head;
a rear portion positioned aft of the striking face comprising a crown in an upper portion of the golf club head and a sole portion in a lower portion of the golf club head;
The x-axis is defined as the horizontal axis having a positive x direction towards the heel of the golf club head and tangent to the face center, and the y-axis has a positive y direction towards the crown of the golf club head and on the x-axis. a rear portion that is an orthogonal vertical axis, wherein the z-axis has a positive z-direction extending forward and is orthogonal to both the x-axis and the y-axis; and
A first weighting member and a second weighting member positioned both near a central portion of the golf club head in a heel to toe orientation, substantially in line with the face center and along the z-axis, the first weighting member sole proximate the striking face a first weighting member and a second weighting member positioned on the portion and the second weighting member positioned proximate the rear edge of the golf club head;
the first weighting member and the second weighting member have a heavy side and a light side, respectively, and are rotatable to move the CG of the golf club head along a direction parallel to the x-axis;
wherein the golf club head has a MOI-Y to MOI-Z ratio greater than about 1.5. The golf club of claim 1 , wherein one of the first and second weighting members weighs more than 15 grams and the other weighs less than 10 grams. The method of claim 1 , wherein the first and second weighting members have an anterior position with CG-C being a distance from the shaft axis of 14 mm to 21 mm parallel to the z-axis with CG posterior; interchangeable to move the CG of the golf club head between aft positions having a second CG-C of 22 mm to 30 mm. The golf club head of claim 1 , wherein the first weighting member is greater than 15 grams, the second weighting member is less than 10 grams, the golf club head is parallel to the z-axis from the shaft axis between 14 mm and 21 mm, the CG is rearward. A golf club with a CG-C that is a distance. The golf club head of claim 1 , wherein the second weighting member is greater than 15 grams, the first weighting member is less than 10 grams, and the golf club head has a MOI-Y greater than ^{about 450 kg-mm 2 , MOI-Y to MOI-} A golf club, wherein the Z ratio is about 2 or greater. The golf club of claim 1 , wherein each of the first weighting member and the second weighting member has a mass difference between the light side and the heavy side of about 4 to 8 grams. 7. The golf club of claim 6, wherein the CG is positioned between 0.4 mm and 1.5 mm from the z-axis towards the toe when both the first and second weighting members are oriented with the heavy side facing the toe. 7. The golf club of claim 6, wherein the CG is located between 0.4 mm and 1.5 mm from the z-axis towards the heel when both the first and second weighting members are oriented with the heavy side facing the heel. 7. The golf club of claim 6, wherein the mass difference between the light side and the heavy side of the first and second weighting members is substantially the same. The golf club of claim 1 , wherein the first weighting member is secured to the golf club head by a first fastener extending substantially in the y direction and the second weighting member is secured to the golf club head by a second fastener extending substantially in the z direction. A golf club, coupled to the head. 11. The golf club of claim 10, wherein the second weighting member is coupled to the aft wall that is substantially vertical and is about 0.25 inches to about 1.0 inches.

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