Large Blade Putter

Abstract

Embodiments of blade-style putter-type club heads include enlarged physical features such as enlarged length, height, and depth. The enlarged physical features, particularly the enlarged length, allow the mass to be located farther from the center of gravity. By positioning the mass away from the center of gravity, the blade-style club heads can achieve an increased MOIyy, which creates a more forgiving blade-style putter-type club head.

Description

[Technical field]

[0001] (Cross-reference priority) This claims the benefit of U.S. Provisional Application No. 63 / 267,833, filed February 10, 2022, the contents of which are incorporated by reference in their entirety herein.

[0002] FIELD OF THE DISCLOSURE This disclosure relates generally to golf clubs, and more particularly to blade-style putter-type golf club heads having a greater length, measured in a heel-to-toe direction, than conventional blade-style putter-type golf club heads. [Background technology]

[0003] Among putter styles, the two main varieties are mallet-style putters and blade-style putters. In comparison, blade-style putters are generally much thinner (from the face to the rear) than mallet-style putters. While blade-style putters have had relatively the same shape over the years, mallet-style putters have evolved from their original semicircular design to include a variety of shapes and sizes. In most cases, the weight of a blade-style putter is greater than that of a mallet-style putter. However, the physical size of a mallet-style putter is generally larger than that of a blade-style putter. The larger size of a mallet-style putter allows for a higher moment of inertia (MOI), allowing the mallet-style putter to be more forgiving.

[0004] However, blade-style putters also have advantages. Blade-style putters provide better feel as well as more control over ball speed compared to mallet-style putters. Blade-style putters also provide better alignment to the golf ball. Thus, there is a need in the art for a blade-style putter with a blade-style putter-type golf club head that continues to provide the desired control and feel of a traditional blade-style putter, while also having the forgiveness of a traditional mallet-style putter-type golf club head. [Brief description of the drawings]

[0005] In order to facilitate further explanation of the embodiments, the following drawings are provided:

[0006] [Figure 1] FIG. 1 shows a front view of a golf club according to a first embodiment of the prior art.

[0007] [Diagram 2] 1 is a front view of a golf club according to a first embodiment.

[0008] [Diagram 3] 3 shows a toe side view of the golf club of FIG. 2.

[0009] [Figure 4] 3 shows a heel side view of the golf club of FIG. 2.

[0010] [Diagram 5] 3 shows a rear view of the golf club of FIG. 2.

[0011] [Figure 6] 3 shows an isometric view of the golf club of FIG. 2.

[0012] [Figure 7a] 3 shows a front view of the golf club of FIG. 2.

[0013] [Figure 7b] FIG. 7b shows a sliced ​​cross section of the golf club of FIG. 7a.

[0014] [Figure 7c] FIG. 7b shows a sliced ​​cross section of the golf club of FIG. 7a.

[0015] [Figure 7d] FIG. 7b shows a sliced ​​cross section of the golf club of FIG. 7a.

[0016] [Figure 7e] FIG. 7b shows a sliced ​​cross section of the golf club of FIG. 7a.

[0017] [Figure 8] 7b shows a front view of the golf club of FIG. 7a.

[0018] [Figure 9] 13 shows a rear view of a golf club according to a second embodiment.

[0019] [Figure 10] 13 shows a bottom view of a golf club according to a third embodiment.

[0020] [Figure 11] FIG. 13 shows a top view of a golf club according to a fourth embodiment.

[0021] [Figure 12] FIG. 13 shows a top view of a golf club according to a fifth embodiment.

[0022] [Figure 13] FIG. 13 shows a top view of a golf club according to a sixth embodiment.

[0023] [Figure 14] FIG. 13 shows a front view of a golf club according to a seventh embodiment.

[0024] [Figure 15a] FIG. 1 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional blade putter.

[0025] [Figure 15b] FIG. 1 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional blade putter.

[0026] [Figure 15c] FIG. 1 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional blade putter.

[0027] [Figure 15d] FIG. 1 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional blade putter.

[0028] [Figure 15e] FIG. 1 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional blade putter.

[0029] [Figure 16a] FIG. 2 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional mallet putter.

[0030] [Figure 16b] FIG. 2 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional mallet putter.

[0031] [Figure 16c] FIG. 2 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional mallet putter.

[0032] [Figure 16d] FIG. 2 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional mallet putter.

[0033] [Figure 16e]FIG. 2 is a diagram showing the results of a performance test in which the first embodiment of the present invention is compared with a conventional mallet putter.

[0034] For simplicity and clarity of illustration, the drawings show general structural aspects, and descriptions and details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the present invention. Furthermore, elements in the drawings are not necessarily drawn to scale. For example, the dimensions of some elements in the drawings may be exaggerated relative to other elements to help understand embodiments of the present invention. The same reference numerals in different drawings refer to the same elements.

[0035] Described herein is a blade-style putter-type golf club head (also referred to as a "blade-style club head" or an "enlarged blade-style club head") that is enlarged from a conventional mallet-style putter-type golf club head (also referred to as a "conventional mallet-style club head"). The enlarged blade-style club head, and more specifically the enlarged length, allows a majority of the mass to be located toward the periphery of the blade-style club head. By placing a majority of the mass toward the periphery, the enlarged blade-style club head can achieve a larger MOIyy than both a conventional blade-style club head and a conventional mallet-style club head, and is therefore more forgiving. The increased MOIyy helps prevent undesired rotation about the Y-axis and ensures that the strike face is square at impact. The enlarged blade-style club head achieves better performance by incorporating the forgiveness typically associated with a mallet-style putter into a blade-style putter. The improved performance can be attributed to the enlarged geometric size, and more specifically the enlarged length, of the enlarged blade-style club head.

[0036] The enlarged geometric blade-style club heads provide the player with the increased forgiveness typically associated with traditional mallet-style golf club heads, while still possessing the desirable control and feel associated with traditional blade-style golf club heads. As described below, the enlarged size raised some concerns about the visual appeal of the blade-style club heads, but the performance of the blade-style club heads was determined to outweigh any concerns. The enlarged blade-style club heads resulted in an average of 4.00% fewer putts when compared to both traditional blade-style club heads and traditional mallet-style club heads. This equates to approximately 2-3 strokes per round, which can lower a player's handicap by up to 1 on the GHIN scale (USGA). Due to the enlarged length and perimeter weight positioning, the enlarged blade-style club heads can achieve up to 85% more MOIyy than traditional blade-style club heads and up to 30% more MOIyy than traditional mallet-style golf club heads.

[0037] (definition) The terms "include" and "have" and variations thereof are used herein to cover a non-exclusive inclusion, and a process, method, system, article, device, or apparatus having a list of elements is not necessarily limited to those elements and may include other elements not expressly listed or inherent to such process, method, system, article, device, or apparatus.

[0038] In this specification and claims, terms such as "left," "right," "front," "rear," "top," "bottom," "above," "below," and the like, if any, are used for purposes of description and not necessarily to describe permanent relative positions. It is to be understood that terms so used are interchangeable under appropriate circumstances, such that the embodiments of the invention described herein are, for example, operable in orientations other than those illustrated or otherwise described herein.

[0039] As used herein, the term "strike face" refers to the front surface of a club head that is configured to strike a golf ball. The term strike face can be used interchangeably with the term "face."

[0040] The term "strike face perimeter" as used herein may refer to an edge of a strike face. The strike face perimeter may be located along the outer edge of the strike face where the curvature deviates from the bulge and / or roll of the strike face.

[0041] The term "geometric center" or "geometric center" of the strike face as described herein can refer to the geometric center of the strike face perimeter and the midpoint of the face height of the strike face. In the same or other examples, the geometric center can also be centered with respect to an engineered impact zone, which can be defined by an area of ​​grooves on the strike face. As another approach, the geometric center of the strike face can be located according to a definition of a golf governing body, such as the United States Golf Association (USGA).

[0042] The term "ground plane" as used herein may refer to a reference plane associated with the surface on which the golf ball rests. The ground plane may be the horizontal plane that is in contact with the sole at the address position.

[0043] As used herein, the term "loft plane" may refer to a reference plane that is tangent to the geometric center point of the strike face.

[0044] The term "loft angle" as used herein may refer to the angle measured between the loft plane and the XY plane (defined below).

[0045] The term "lie angle" as used herein may refer to the angle between a hosel axis extending through the hosel and the ground plane. The lie angle is measured from a front view.

[0046] As used herein, the term "toe side" refers to a direction extending substantially toward the toe of the club head.

[0047] As used herein, the term "heel side" refers to a direction extending substantially toward the heel of the club head.

[0048] The term "forward" as used herein refers to a direction extending substantially toward the club head face.

[0049] The term "rearward" as used herein refers to a direction extending substantially toward the rear of the club head.

[0050] As described herein, the "depth" of a blade-style putter-type club head (also referred to as a "blade-style club head") may be defined as the dimension from the front to the rear of the blade-style club head.

[0051] As described herein, the "height" of a blade-style club head may be defined as the dimension from the top rail to the sole of the blade-style club head. In many embodiments, the height of the club head may be measured according to a golf governing body, such as the United States Golf Association (USGA).

[0052] As described herein, the "length" of a blade-style club head may be defined as the heel-to-toe dimension of the blade-style club head. In many embodiments, the length of the club head may be measured according to a golf governing body, such as the United States Golf Association (USGA).

[0053] The "face height" of the blade-style club heads described herein may be defined as the height measured parallel to the loft plane between the upper end of the strike face perimeter near the top rail and the lower end of the strike face perimeter near the sole.

[0054] The "leading edge" of the club head described herein may be identified as the portion of the strike face that is closest to the sole.

[0055] The "XYZ" coordinate system for the blade style club heads described herein is based on the geometric center of the strike face. The dimensions of the blade style club heads described herein may be measured based on the coordinate system as defined below. The geometric center of the strike face defines a coordinate system having an origin located on the leading edge at the center of the blade style club head. The coordinate system defines an X-axis, a Y-axis, and a Z-axis. The X-axis extends through the geometric center of the strike face in a direction from the heel to the toe of the blade style club head. The Y-axis extends through the geometric center of the strike face in a direction from the top rail to the sole of the blade style club head. The Y-axis is perpendicular to the X-axis. The Z-axis extends through the geometric center of the strike face in a direction from the strike face toward the rear of the blade style club head. The Z-axis is perpendicular to both the X-axis and the Y-axis.

[0056] The term or phrase "center of gravity location" or "CG location" as used herein refers to the location of the club head center of gravity (CG) relative to an XYZ coordinate system, with the CG location being characterized by location along the X, Y, and Z axes. The term "CGx" may refer to the CG location along the X axis, measured from the origin. The term "CG height" may refer to the CG location along the Y axis, measured from the origin. The term "CGy" may be synonymous with CG height. The term "CG depth" may refer to the CG location along the Z axis, measured from the origin. The term "CGz" may be synonymous with CG depth.

[0057] The "perimeter weight center of gravity" or "CG w The term or phrase refers to the circumference weight center of gravity (CG) relative to the XYZ coordinate system. w ) position, and the CG position is characterized by its location along the X-axis, Y-axis, and Z-axis. The term "CGwx" refers to the CG position along the X-axis, measured from the origin. w The term "CGwy" can refer to the position of the CG along the Y axis, measured from the origin. w The term "CGwz" can refer to the position of the CG along the Z axis, measured from the origin. w It can point to the location of.

[0058] The term "geometric center plane" or "GC plane" of the golf club described herein refers to the mid-plane of the body that extends rearward from the strike face. With reference to FIG. 7a, the GC plane can extend rearward from the strike face and can be located at the midpoint between the heel and the toe. The GC plane can be perpendicular to the ground plane.

[0059] The term "face height" for the blade-style club heads described herein may be defined as the height measured parallel to the loft plane between the upper end of the strike face perimeter near the top rail and the lower end of the strike face perimeter near the sole.

[0060] The term "shaft axis" of the golf clubs described herein may be defined as the axis extending from the geometric center of the tip to the geometric center of the tail.

[0061] As used herein, the term or phrase "moment of inertia" (hereinafter "MOI") refers to a value measured with respect to the CG. As used herein, the term "MOIxx" refers to the MOI measured in a heel-to-toe direction parallel to the X-axis. As used herein, the term "MOIyy" refers to the MOI measured in a sole-to-top rail direction parallel to the Y-axis. As used herein, the term "MOIzz" refers to the MOI measured in a front-to-back direction parallel to the Z-axis. The MOI values ​​MOIxx, MOIyy, and MOIzz provide a measure of forgiveness for off-center impacts between a golf ball and a golf club head.

[0062] (explanation) I. Putter-type blade-style club head with extended length Described herein is a blade-style putter-type golf club (hereinafter also referred to as a "blade-style club head") that has the high forgiveness typically associated with a conventional mallet-style putter-type club head (also referred to as a "conventional mallet-style club head"), while still having the desirable control and feel associated with a conventional blade-style club head. This improved length of the blade-style club head is achieved by significantly increasing the geometric size, including but not limited to the length, as described herein, compared to a conventional blade-style club head, in combination with a specific weight ratio from the geometric center of the blade-style club head. More specifically, the increased face height, length, and depth of the current embodiment, as well as the positioning of the perimeter weighting, allow the majority of the mass to be located toward the perimeter of the blade-style club head. This allows the blade-style club head to achieve a larger MOI than a conventional blade-style putter-type club head (also referred to as a "conventional blade-style club head"), and thus is more forgiving than a conventional blade-style golf club head. While the increased geometric size may be initially bothersome to some players, through testing as described below, it has been determined that the playability of the blade-style club head overcomes these burdens, resulting in an average of 4.00% fewer putts. The increased number of putts can translate to a savings of 1-2 strokes per round and 1-2 strokes in a player's handicap.

[0063] The overall characteristics of a blade style club head are similar to those of a traditional blade style putter. However, the characteristics differ (as described below) in length, depth, height, and weight location equivalent to a blade style club head. The blade style club head may have a strike face and a back wall opposite the strike face. The blade style club head may have a top rail adjacent the strike face and disposed adjacent the back wall. The blade style club head may further have a sole opposite the top rail and a leading edge adjacent both the strike face and the sole.

[0064] As discussed above, by increasing the dimensions, specifically the length, depth, height, and weighting, the blade style club head can achieve a desired level of forgiveness. The dimensions of the blade style club head described herein can be measured based on the XYZ coordinate system defined below. The XYZ coordinate system can be seen in FIG. 2. The XYZ coordinate system can further include an origin located on the leading edge at the center of the strike face. The XYZ coordinate system defines an X-axis, a Y-axis, and a Z-axis. The X-axis passes through the origin of the strike face and extends in a heel-to-toe direction. The Y-axis passes through the origin of the strike face and extends in a top rail-to-sole direction. The Y-axis is perpendicular to the X-axis. The Z-axis passes through the origin of the strike face and extends in a front-to-rear direction. The Z-axis is perpendicular to both the X-axis and the Y-axis.

[0065] (A. Distribution of length and mass) A blade-style club head can have a length measured in a direction parallel to the X-axis from the outermost toe to the outermost heel. The length can be between 4.50 inches and 7.00 inches. In some embodiments, the length can be between 4.50 inches and 4.75 inches, between 4.75 inches and 5.00 inches, between 5.00 inches and 5.25 inches, between 5.25 inches and 5.50 inches, between 5.50 inches and 5.75 inches, between 5.75 inches and 6.00 inches, between 6.00 inches and 6.25 inches, between 6.25 inches and 6.50 inches, between 6.50 inches and 6.75 inches, and between 6.75 inches and 7.00 inches. In one exemplary embodiment, the length is 6.00 inches. In some embodiments, the length can be greater than 4.50 inches, greater than 5.00 inches, greater than 5.50 inches, greater than 6.00 inches, or greater than 6.50 inches.

[0066] The length can be significantly greater than that of a conventional blade-style golf club head. The length of the blade-style club heads described herein can have an increase in length of up to 35% compared to a conventional blade-style golf club head. The increased length described herein can enable the ability to increase the MOI by moving mass away from the center of gravity (CG).

[0067] The total mass of the blade style club head described herein can have a relatively similar total mass to a conventional blade putter. In many embodiments, the blade style club head can have a total mass in the range between 320 grams and 380 grams. In some embodiments, the total mass of the blade style club head can be in the range between 320 grams and 325 grams, between 325 grams and 330 grams, between 330 grams and 335 grams, between 335 grams and 340 grams, between 340 grams and 345 grams, between 345 grams and 350 grams, between 350 grams and 355 grams, between 355 grams and 360 grams, between 360 grams and 365 grams, between 365 grams and 370 grams, between 370 grams and 375 grams, or between 375 grams and 380 grams. In one exemplary embodiment, the total mass is 345 grams. The overall mass of a blade-style club head can have a direct effect on the control a player has over his putt, and more specifically, the control a player has over the velocity of the putt.

[0068] As mentioned above, increasing length allows for mass to be moved away from the CG. A 20-35% increase in length is the core element for a blade-style putter to perform like a traditional mallet-style putter. This can be accomplished by adding perimeter weighting to specific zones outside the center plane of the blade-style clubhead. Perimeter weighting can be achieved by adding tungsten, or a carbide with a density of 8-12 (g / cm 3 This can be accomplished in a variety of ways, such as, but not limited to, denser weights such as any material greater than 100 mm in diameter, thicker areas with mass on the perimeter of the putter, or a hybrid material mixture with greater density from the center outward. One such use of perimeter weighting is one or more perimeter weights.

[0069] A means of adding weight to the perimeter to increase the MOI of the putter can be accomplished by adding perimeter weights. In some embodiments, the perimeter weights can be comprised of one or more bar weights located at the rear of the club head, as seen in FIG. 11. In some embodiments, the perimeter weights can further include a plurality of toe weights and a plurality of heel weights. The plurality of toe weights can have one or more weights located on the toe side of the GC (geometric center) plane. In some embodiments, the plurality of toe weights can have one weight, two weights, three weights, four weights, or five weights. The plurality of heel weights can have one or more weights located on the heel side of the GC plane. In some embodiments, the plurality of heel weights can have one weight, two weights, three weights, four weights, or five weights. Each of the perimeter weights can be any one or combination of rectangular, triangular, pyramidal, spherical, semicircular, square, cylindrical, oval, elliptical, trapezoidal, pentagonal, hexagonal, octagonal, or other desired geometric or non-geometric shapes.

[0070] In many embodiments, the perimeter weights can be formed separately and connected to the blade-style club head. In such embodiments, a portion of the blade-style club head having a shape that fits the perimeter weights can be machined to allow the perimeter weights to be connected to the blade-style club head via welding, soldering, brazing, swaging, adhesives, epoxies, mechanical fastening, or any other suitable joining method. In such embodiments, the perimeter weights can be connected to the strike face, rear, sole, heel, or toe. In many embodiments, the perimeter weights can be formed of a material having a density greater than that of the blade-style club head. The inclusion of the perimeter weights can concentrate a large amount of mass in a specific location to improve the mass properties of the blade-style club head.

[0071] Each perimeter weight can have a mass. In many embodiments, the mass of a single perimeter weight can be between 5 grams and 75 grams. In some embodiments, the mass of a single perimeter weight can be between 5 grams and 10 grams, between 10 grams and 15 grams, between 15 grams and 20 grams, between 20 grams and 25 grams, between 25 grams and 30 grams, between 30 grams and 35 grams, between 35 grams and 40 grams, between 40 grams and 45 grams, between 45 grams and 50 grams, between 50 grams and 55 grams, between 60 grams and 65 grams, between 65 grams and 70 grams, or between 70 grams and 75 grams.

[0072] The addition of perimeter weighting can allow for a shift of weight toward the perimeter of a blade-style clubhead, which can increase the MOI or forgiveness of the clubhead. The location of the perimeter weights relative to the CG can significantly increase the MOI and shift the CG of the clubhead. Perimeter weighting is located closer to the center of gravity (CG). w "). CG w can be positioned further away from the Y axis. More specifically, as mentioned above, the length allows the perimeter weights to be positioned further away from the Y axis, which can have a greater effect on the MOIyy. Therefore, the CG from the Y axis w The greater the distance of the CG from the Y axis, the greater the increase in MOIyy. w The distance from the Y axis to the CG can be between ±1.5 inches and ±3.5 inches. w The distance from the Y axis to the CG can be between ±1.50 inches and ±1.75 inches, between ±1.75 inches and ±2.00 inches, between ±2.00 inches and ±2.25 inches, between ±2.25 inches and ±2.50 inches, between ±2.50 inches and ±2.75 inches, between ±2.75 inches and ±3.00 inches, between ±3.00 inches and ±3.25 inches, or between ±3.25 inches and ±3.50 inches.w The distance to can be greater than ±1.50 inches, greater than ±1.75 inches, greater than ±2.00 inches, greater than ±2.25 inches, greater than ±2.50 inches, greater than ±2.75 inches, greater than ±3.00 inches, or greater than ±3.25 inches.

[0073] As shown in Figure 7a, the blade style club heads described herein can have multiple sets of planes. The planes are spaced apart from and parallel to the GC plane along the X axis. The planes are included to provide sections of the golf club head to highlight the weight distribution in each section.

[0074] The first set of planes may be located a distance "L1" away from the GC plane. In some embodiments, L1 may be ±1.0 inch from the GC plane. The first set of planes may be further located a distance "L2" away from each other. In some embodiments, L2 may be 2.0 inches. A percentage of the total mass is located outside (toe or heel) the first set of planes. In some embodiments, between 65% and 85% of the total mass is located outside the first set of planes. In some embodiments, the percentage of the total mass located outside the first set of planes is between 65% and 70%, between 70% and 75%, between 75% and 80%, or between 80% and 85% of the total mass. In some embodiments, the percentage of the club head's total mass located outside the first set of planes is greater than 65%, greater than 70%, greater than 75%, greater than 80%, or greater than 85%. In one exemplary embodiment, the percentage of the blade style club head's total mass that is outside of the first set of planes is 75%. The percentage of the blade style club head's total mass that is outside of the first set of planes can be up to 15% greater when compared to a conventional blade style golf club head.

[0075] The second set of planes may be located a distance "L3" away from the GC plane. In some embodiments, L3 may be ±1.5 inches from the GC plane. The second set of planes may be further located a distance "L4" away from each other. In some embodiments, L4 may be 3.0 inches. A percentage of the total mass is located outside (toe or heel) the second set of planes. In some embodiments, between 45% and 65% of the total mass is located outside the second set of planes. In some embodiments, the percentage of the total mass located outside the second set of planes is between 45% and 50%, between 50% and 55%, between 55% and 60%, or between 60% and 65% of the total mass. In some embodiments, the percentage of the total mass located outside the second set of planes is greater than 45%, greater than 50%, greater than 55%, greater than 60%, or greater than 65%. In one exemplary embodiment, the percentage of the total mass located outside the second set of planes is 58%.

[0076] If more than half of the blade-style club head's total mass is located closer to the periphery than the center, the MOIyy can be increased significantly. The increased MOIyy can prevent rotation about the Y-axis when a mis-hit occurs, thereby making the club more forgiving. The percentage of the blade-style club head's total mass that is located outside the second set of planes can be up to 70% greater when compared to a conventional blade-style golf club head.

[0077] The third set of planes may be located a distance "L5" away from the GC plane. In some embodiments, L5 may be ±2.0 inches from the GC plane. The third set of planes may be further located a distance "L6" away from each other. In some embodiments, L6 may be 4.0 inches. A percentage of the total mass is located outside (toe or heel) of the third set of planes. In some embodiments, between 30% and 50% of the total mass is located outside the third set of planes. In some embodiments, the percentage of the total mass located outside the third set of planes is between 30% and 35%, between 35% and 40%, between 40% and 45%, or between 45% and 50%. In some embodiments, the percentage of the blade style club head's total mass located outside the third set of planes is greater than 30%, greater than 35%, greater than 40%, greater than 45%, or greater than 50%. In one exemplary embodiment, the percentage of the total mass located outside the third set of planes is 40%. The percentage of the total mass of a blade-style club head located outside the third set of planes can be 400% greater than a conventional blade-style golf club head.

[0078] The fourth set of planes may be located a distance "L7" away from the GC plane. In some embodiments, L7 may be ±2.5 inches from the GC plane. The fourth set of planes may be further located a distance "L8" away from each other. In some embodiments, L8 may be 5.0 inches. A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside the fourth set of planes. In some embodiments, the percentage of the total mass located outside the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%. In one exemplary embodiment, the percentage of the total mass located outside the fourth set of planes is 17%.

[0079] By increasing the perimeter weighting, along with the larger dimensions of the blade-style club head described herein, a greater percentage of the total mass of the blade-style club head can be located away from the CG. This increase in length of between 20-35%, combined with the placement of mass in a zone further away from the central axis of the putter, can result in the blade-style club head's CG being located lower and further back, creating an improved MOI. The center of gravity or "CG" as described above can affect the putting stroke itself as well as the outcome of the putting stroke (i.e., the performance of the golf ball). More specifically, the CG location affects the topspin imparted to the golf ball and the ability of the club head to produce a smooth rolling putt. The CG location relative to the Y-axis (hereinafter referred to as "CGy") determines the twist zero point or sweet spot. The CG location relative to the X-axis (hereinafter referred to as "CGx") affects the launch as well as the spin of the golf ball. The CG location relative to the Z-axis (hereinafter referred to as "CGz") also affects the launch and spin of the golf ball and the forgiveness of the blade-style club head.

[0080] As mentioned above, CGx is the CG position relative to the X-axis from the origin. In some embodiments, CGx can be between 0.00 inches and 0.10 inches. In some embodiments, CGx can be between 0.00 inches and 0.01 inches, between 0.01 inches and 0.02 inches, between 0.02 inches and 0.03 inches, between 0.03 inches and 0.04 inches, between 0.04 inches and 0.05 inches, between 0.05 inches and 0.06 inches, between 0.06 inches and 0.07 inches, between 0.07 inches and 0.08 inches, between 0.08 inches and 0.09 inches, or between 0.09 inches and 0.10 inches. In some embodiments, CGx may be less than 0.10 inches, less than 0.09 inches, less than 0.08 inches, less than 0.07 inches, less than 0.06 inches, less than 0.05 inches, less than 0.04 inches, less than 0.03 inches, less than 0.02 inches, or less than 0.01 inches.

[0081] As mentioned above, CGy is the CG position relative to the Y-axis from the origin. In some embodiments, CGy can be between 0.3 inches and 0.90 inches. In some embodiments, CGy can be between 0.30 inches and 0.35 inches, between 0.35 inches and 0.40 inches, between 0.40 inches and 0.45 inches, between 0.45 inches and 0.50 inches, between 0.50 inches and 0.55 inches, between 0.55 inches and 0.60 inches, between 0.60 inches and 0.65 inches, between 0.65 inches and 0.70 inches, between 0.70 inches and 0.75 inches, between 0.75 inches and 0.80 inches, between 0.80 inches and 0.85 inches, or between 0.85 inches and 0.90 inches.

[0082] As discussed above, CGz is the CG position relative to the Z axis from the origin. In some embodiments, CGz can be between -0.35 inches and -1.10 inches. In some embodiments, CGz can be between -0.35 inches and -0.40 inches, between -0.40 inches and -0.45 inches, between -0.45 inches and -0.50 inches, between -0.50 inches and -0.55 inches, between -0.55 inches and -0.60 inches, between -0.60 inches and -0.65 inches, between -0.65 inches and -0.70 inches, between ... The gap may be between -0.75 inches and -0.75 inches, between -0.75 inches and -0.80 inches, between -0.80 inches and -0.85 inches, between -0.85 inches and -0.90 inches, between -0.90 inches and -0.95 inches, between -0.95 inches and -1.00 inches, between -1.00 inches and -1.05 inches, or between -1.05 inches and -1.10 inches.

[0083] This allows the blade-style clubhead to achieve a higher MOIyy, which has a direct correlation to the forgiveness of the blade-style clubhead. The higher the MOIyy, the less likely the blade-style clubhead will twist about the Y-axis when the clubhead strikes the ball. More specifically, when the clubhead strikes the ball at a point other than the center on the face, an increase in MOIyy prevents the clubhead from twisting, which can result in an undesirable putt (i.e., an offline putt).

[0084] MOIyy is 800g*in 2 From 1500g*in 2 In some embodiments, the MOIyy can range from 800 g*in 2 and 850g*in 2 Between 850g*in 2 and 900g*in 2 Between 900g*in 2 and 950g*in 2 Between 950g*in 2 and 1000g*in 2 Between 1000g*in 2 and 1050g*in 2 Between 1050g*in 2 and 1100g*in 2 Between 1100g*in 2 and 1150g*in 2 Between 1150g*in 2 and 1200g*in 2 Between 1200g*in 2 and 1250g*in 2 Between 1250g*in 2 and 1300g*in 2 Between 1300g*in 2 and 1350g*in 2 Between 1350g*in 2 and 1400g*in 2 Between 1400g*in 2 and 1450g*in 2 or 1450g*in 2 and 1500g*in2 In some embodiments, the MOIyy can be between 800 g*in 2 Larger than 900g*in 2 Larger than 1000g*in 2 Larger than 1100g*in 2 Larger than 1200g*in 2 Larger than 1300g*in 2 Greater than or equal to 1400g*in 2 In one exemplary embodiment, the MOIyy is 1225 g*in 2 The MOIyy of the blade style club heads described herein can be up to 85% greater than a conventional blade style golf club head. Additionally, the blade style club heads described herein can achieve up to about 25% greater MOIyy compared to a conventional mallet style golf club head. The increased MOIyy helps prevent unwanted rotation about the Y axis and ensures that the strike face is square at impact.

[0085] As mentioned above, the blade style club head weighs 100g*in 2 From 200g*in 2 In some embodiments, the MOIxx can range from 100 g*in 2 and 125g*in 2 Between 125g*in 2 and 150g*in 2 Between 150g*in 2 and 175g*in 2 or 175g*in 2 and 200g*in 2 In some embodiments, the MOIxx can be between 100 g*in 2 Larger or 200g*in 2 In one exemplary embodiment, the MOIxx is 135 g*in 2 Increasing the MOIxx prevents the unwanted rotation about the X-axis.

[0086] Additionally, as mentioned above, the blade style club head is 800g*in 2 From 1500g*in 2 In some embodiments, the MOIzz can range between 800 g*in 2 and 850g*in 2 Between 850g*in 2 and 900g*in 2 Between 900g*in 2 and 950g*in 2 Between 950g*in 2 and 1000g*in 2 Between 1000g*in 2 and 1050g*in 2 Between 1050g*in 2 and 1100g*in 2 Between 1100g*in 2 and 1150g*in 2 Between 1150g*in 2 and 1200g*in 2 Between 1200g*in 2 and 1250g*in 2 Between 1250g*in 2 and 1300g*in 2 Between 1300g*in 2 and 1350g*in 2 Between 1350g*in 2 and 1400g*in 2 Between 1400g*in 2 and 1450g*in 2 or 1450g*in 2 and 1500g*in 2 In some embodiments, the MOIzz can be between 800 g*in 2 Larger than 900g*in 2 Larger than 1000g*in 2 Larger than 1100g*in 2 Larger than 1200g*in 2 Larger than 1300g*in 2 Greater than or equal to 1400g*in 2In one exemplary embodiment, the MOIzz can be greater than 1225 g*in 2 The MOIzz is greater in the blade-style club heads described herein as compared to traditional blade-style golf club heads. The increased MOIzz helps prevent undesirable rotation about the Z-axis and ensures that the desired spin is achieved.

[0087] The blade-style club head may further have an MOIyy / CGz ratio. It is noted that this ratio represents the uniqueness of the blade-style club head described herein. The MOIyy / CGz of the blade-style club head is much greater than a conventional blade putter, and even much greater than a conventional mallet putter. A conventional mallet putter has a higher MOIyy than a conventional blade putter. This has been achieved by increasing the depth of the putter. The blade-style club head described herein achieves an even greater MOIyy by increasing the length as opposed to the depth. By increasing the length with the addition of perimeter weighting as described above, the blade-style club head may achieve a greater MOIyy / CGz ratio.

[0088] In some embodiments, the MOIyy / CGz ratio may be between 1600 and 2550. In some embodiments, the MOIyy / CGz ratio can be between 1600 and 1650, between 1650 and 1700, between 1700 and 1750, between 1750 and 1800, between 1800 and 1850, between 1850 and 1900, between 1900 and 1950, between 1950 and 2000, between 2000 and 2050, between 2050 and 2100, between 2100 and 2150, between 2150 and 2200, between 2200 and 2250, between 2250 and 2300, between 2300 and 2350, between 2350 and 2400, between 2450 and 2500, or between 2500 and 2550. In some embodiments, the MOIyy / CGz ratio can be greater than 1650, greater than 1750, greater than 1850, greater than 1950, greater than 2050, greater than 2150, greater than 2250, greater than 2350, greater than 2450, or greater than 2550.

[0089] As discussed above, the blade-style club heads described herein can achieve approximately 85% higher MOIyy compared to conventional blade-style golf club heads. This can be due to the increased length as opposed to the increased depth typically associated with high MOI putters, such as conventional mallet putters. Additionally, as described below in Example 3, the blade-style club heads described herein can achieve approximately 23% higher MOIyy compared to conventional mallet-style golf club heads. The blade-style club heads can have a depth measured in a direction parallel to the Z-axis. The depth can be between 1.25 inches and 2.00 inches. In some embodiments, the depth can be between 1.25 inches and 1.30 inches, between 1.30 inches and 1.35 inches, between 1.35 inches and 1.40 inches, between 1.40 inches and 1.45 inches, between 1.45 inches and 1.50 inches, between 1.50 inches and 1.55 inches, between 1.55 inches and 1.60 inches, between 1.60 inches and 1.65 inches, between 1.65 inches and 1.70 inches, between 1.70 inches and 1.75 inches, between 1.75 inches and 1.80 inches, between 1.80 inches and 1.85 inches, between 1.85 inches and 1.90 inches, between 1.90 inches and 1.95 inches, or between 1.95 inches and 2.00 inches. In one exemplary embodiment, the depth is 1.650 inches.

[0090] In many embodiments, the blade style club head may further have a loft angle of less than 10 degrees. In many embodiments, the loft angle of the blade style club head may be between 0 and 5 degrees, between 0 and 6 degrees, between 0 and 7 degrees, or between 0 and 8 degrees. Additionally, the loft angle of the club head may be less than 10 degrees, less than 9 degrees, less than 8 degrees, less than 7 degrees, less than 6 degrees, or less than 5 degrees. As a further example, the loft angle of the club head may be 0 degrees, 1 degree, 2 degrees, 3 degrees, 4 degrees, 5 degrees, 6 degrees, 7 degrees, 8 degrees, 9 degrees, or 10 degrees. The loft angle may be selected according to player preference.

[0091] (B. Other Features) 1. Hosel Additionally, in some embodiments, the blade style club head can have a hosel attached to the heel. In such embodiments, the hosel can have a hosel shape. The hosel shape can be selected from the group consisting of plumber's neck, slant neck, or flow neck. In other embodiments, the blade style club head can have a hosel bore as opposed to a hosel, as previously described. In such embodiments, the hosel bore can be located in the center of the blade style club head or in the heel of the blade style club head. In such embodiments, the hosel bore can receive a shaft having a tip shape selected from the group consisting of a straight neck, a single bend, or a double bend.

[0092] As shown in FIG. 8, the hosel can have a hosel axis. The hosel axis can be concentric with a hosel or hosel bore configured to receive and connect a golf shaft to the club head. The hosel axis can be parallel to the Y axis and perpendicular to the X axis. The hosel can be positioned at a distance from the heel, hereinafter referred to as "D h In some embodiments, D h In some embodiments, D is between 0.75 inches and 2.25 inches. h can be between 0.75 inches and 1.00 inches, between 1.00 inches and 1.25 inches, between 1.25 inches and 1.50 inches, between 1.50 inches and 1.75 inches, between 1.75 inches and 2.00 inches, or between 2.00 inches and 2.25 inches. D h This allows the hosel to remain in a desired position relative to the sweet spot and also allows the blade style putter to have the desired toe hang associated with a traditional blade style golf club head. h Also, the enlarged shape as described above does not affect the desired feel and balance of the golf club during the swing.

[0093] (2. Alignment Features) Additionally, as shown in Figures 5 and 6, the blade style club head can have an alignment feature. The alignment feature can be located on the top of the blade style club head such that the alignment feature is visible at address. In many embodiments, the alignment feature can be located in the center of the GC plane. The alignment feature can be any one or combination of a line, circle, dashed line, triangle, rectangle, channel, protrusion, or any other desirable alignment feature. The alignment feature provides visual feedback as to whether the club head is properly aligned at address.

[0094] (3. Material - Strike Face) In some embodiments, the blade-style club head can have a milled strike face. In such embodiments, the strike face is integrally formed with the blade-style club head. In such embodiments, the blade-style club head can be formed of a single material or multiple materials. One or more portions of the club head can be formed of one or any combination of the following materials: 8620 alloy steel, S25C steel, carbon steel, maraging steel, 17-4 stainless steel, 303 stainless steel, 304 stainless steel, stainless steel alloy, tungsten, aluminum, aluminum alloy, ADC-12, or any metal suitable for making a blade-style club head.

[0095] In other embodiments, the blade style club head may have a strike face insert, as illustrated in FIG. 14. In such embodiments, the strike face insert is formed separately before being connected to the blade style club head. In some embodiments, the strike face insert may be made of a material that is the same as or similar to the material of the blade style club head. In other embodiments, the strike face insert may be made of a material that is different from the material of the blade style club head. The strike face may be secured by an adhesive, such as glue, VHB™ (very high bond) tape, epoxy, or other suitable adhesive. Alternatively, or additionally, the strike face may be secured by welding, soldering, screws, rivets, pins, mechanical interlocking structures, or other fastening methods.

[0096] The strike face insert may have any one or more layered combinations of aluminum, stainless steel, copper, thermoplastic copolyester elastomer (TPC), thermoplastic elastomer (TPE), thermoplastic urethane (TPU), steel, nickel, TPU / aluminum, TPE / aluminum, plastic / metal screen insert, polyethylene, polypropylene, polytetrafluoroethylene, polyisobutylene, polyvinyl chloride, PEBAX®, or other desired materials. PEBAX® is a polyether block amide, a thermoplastic elastomer consisting of soft polyether and hard polyamide. The hard polyamide may include nylon. PEBAX® may include various compounds corresponding to different Shore D hardness values, percentage of polyether, and / or percentage of polyamide. In many embodiments, PEBAX® may include PEBAX® 4033 (Arkema, Paris, France) or PEBAX® 6333 (Arkema, Paris, France). PEBAX® 4033 (Arkema, Paris, France) includes tetramethylene oxide (53% wt) and nylon 12. PEBAX® 6333 (Arkema, Paris, France) includes nylon 11. In some embodiments, the face insert can include materials such as steel, steel alloy, tungsten, tungsten alloy, aluminum, aluminum alloy, titanium, titanium alloy, vanadium, vanadium alloy, chromium, chromium alloy, cobalt, cobalt alloy, nickel, nickel alloy, other metal, other metal alloy, composite polymeric material, or any combination thereof. In some embodiments, the strike face insert can have a single layer. In other embodiments, the strike face insert can have two layers, three layers, four layers, or five layers. By using the strike face insert, the designer can achieve a more forgiving putter with a softer feel and sound at impact.

[0097] (5. Material - Outer Weight) The perimeter weights may include any one or more combinations of steel, steel alloys, tungsten alloys, vanadium, vanadium alloys, chromium, chromium alloys, cobalt, cobalt alloys, copper, nickel, nickel alloys, silver, lead, molybdenum, cadmium, bismuth, palladium, ruthenium, gold, protactinium, platinum, osmium, or tungsten. 3 and 20g / cm 3 In some embodiments, the density is between 8 g / cm 3 Larger, 9g / cm 3 Larger than 10g / cm 3 Larger, 11g / cm 3 Larger, 12g / cm 3 Larger, 13g / cm 3 Larger, 14g / cm 3 Larger, 15g / cm 3 Larger, 16g / cm 3 Larger, 17g / cm 3 Larger, 18g / cm 3 Larger or 19g / cm 3 It can be made larger.

[0098] (5. Height) The blade style club head can have a height measured in a direction parallel to the Y-axis. The height can be between 0.90 inches and 1.55 inches. In some embodiments, the height can be between 0.90 inches and 1.00 inches, between 1.00 inches and 1.10 inches, between 1.10 inches and 1.15 inches, between 1.15 inches and 1.20 inches, between 1.25 inches and 1.30 inches, between 1.30 inches and 1.35 inches, between 1.45 inches and 1.50 inches, between 1.40 inches and 1.45 inches, between 1.45 inches and 1.50 inches, or between 1.50 inches and 1.55 inches. In one exemplary embodiment, the height is 1.344 inches.

[0099] (6. Volume) As discussed above, the blade style club head can have a volume. In many embodiments, the volume can range between 50cc and 180cc. In some embodiments, the club head volume can range between 50cc and 55cc, 55cc and 60cc, 60cc and 65cc, 65cc and 70cc, 70cc and 75cc, 75cc and 80cc, 80cc and 85cc, 85cc and 90cc, 90cc and 95cc, 95cc and 100cc, 100cc and 105cc, 105cc and 110cc, 110cc and 115cc, 115cc and 120cc. c and 120cc, 120cc and 125cc, 125cc and 130cc, 130cc and 135cc, 135cc and 140cc, 140cc and 145cc, 145cc and 150cc, 150cc and 155cc, 155cc and 160cc, 160cc and 165cc, 165cc and 170cc, 170cc and 175cc, or 175cc and 180cc. In some embodiments, the volume of the club head can be greater than 50cc, greater than 75cc, greater than 100cc, greater than 125cc, or greater than 150cc.

[0100] I. EXEMPLARY EMBODIMENTS A. Embodiment 1 The first embodiment is an improvement over the design of a conventional blade-style putter-type golf club head (also referred to as a "conventional blade-style club head"). Through simple geometric modifications made to arrive at a large blade-style putter-type club head (also referred to as a "blade-style club head"), the first embodiment can achieve better performance by incorporating the forgiveness typically associated with a conventional mallet-style putter into a blade-style putter. The first embodiment, being a blade-style club head, can achieve these forgiveness parameters as described above.

[0101] For ease of discussion, a blade style club head 100 is used in a first exemplary embodiment to identify and locate the above-mentioned features that are applicable to any embodiment of a blade style club head. The blade style club head 100 can have a strike face 110 formed on a front portion of a body 108, a heel 118, a toe 120 opposite the heel 118, a rear portion 124 opposite the strike face 110, a rear wall 135 opposite the strike face 110, a top rail 112 adjacent the strike face 110 and adjacent the rear wall 135, a sole 122 opposite the top rail 112, and a leading edge 130 adjacent the strike face 110 and the sole 122.

[0102] As shown in FIG. 2 and as described above, the blade style club head 100 can have an XYZ coordinate system. The XYZ coordinate system can further have an origin 158 located on the leading edge 130 at the center of the strike face 110. The XYZ coordinate system defines an X-axis 136, a Y-axis 138, and a Z-axis 140. The X-axis 136 extends through the origin 158 on the strike face 110 in a direction from the heel 118 toward the toe 120 of the blade style club head 100. The Y-axis 138 extends through the origin on the strike face 110 in a direction from the top rail 112 toward the sole 122 of the blade style club head 100. The Y-axis 138 is perpendicular to the X-axis 136. The Z-axis 140 extends through the origin on the strike face 110 in a direction from the strike face 110 toward the rear 124 of the blade style club head 100. The Z-axis 140 is perpendicular to both the X-axis 136 and the Y-axis 138 .

[0103] The blade style club head 100 can have a length 166. The length 166 is key to providing the forgiveness typically associated with a conventional mallet style putter type club head (also referred to as a "mallet style club head"). The length 166 can be measured in a direction parallel to the X-axis 136 from the outermost point of the toe 120 to the outermost point of the heel 118. The length 166 can be between 5.00 inches and 7.00 inches. In some embodiments, the length 166 can be between 5.00 inches and 5.25 inches, between 5.25 inches and 5.50 inches, between 5.50 inches and 5.75 inches, between 5.75 inches and 6.00 inches, between 6.00 inches and 6.25 inches, between 6.25 inches and 6.50 inches, between 6.50 inches and 6.75 inches, or between 6.75 inches and 7.00 inches. In one exemplary embodiment, the length 166 is 6.00 inches. The lengths 166 described herein may allow for the ability to increase the MOI by moving mass away from the CG 148.

[0104] The blade style club head 100 may further have a total mass. The total mass of the blade style club head 100 may range between 320g and 325g, between 325g and 330g, between 330g and 335g, between 335g and 340g, between 340g and 345g, between 345g and 350g, between 350g and 355g, between 355g and 360g, between 360g and 365g, between 365g and 370g, between 370g and 375g, or between 375g and 380g. In one exemplary embodiment, the total mass is 345g. The total mass of the blade style club head 100 may have a direct effect on the control a player has over a putt, and more specifically, the control a player has over the velocity of the putt.

[0105] As noted above, adding weights to the perimeter (heel 118 and toe 120) of the blade-style club head 100 can positively impact the MOI and CG. The blade-style club head 100 can further include perimeter weights 132. In some embodiments, the perimeter weights 132 can be formed separately and connected to the blade-style club head. The perimeter weights 132 can be formed separately and connected to the blade-style club head 100 via welding, soldering, brazing, swaging, adhesive, epoxy, mechanical fastening, or any other suitable joining method. In some of these embodiments, one or more portions of the strike face 110 can be machined to allow the perimeter weights 132 to be connected to the blade-style club head. The perimeter weights 132 can be any one or combination of rectangular, triangular, pyramidal, spherical, semicircular, square, cylindrical, oval, elliptical, trapezoidal, pentagonal, hexagonal, octagonal, or any other desired geometric or non-geometric shape. The perimeter weight 132 comprises tungsten.

[0106] Each perimeter weight 132 can have a mass. In some embodiments, the mass of each perimeter weight 132 can be between 5 grams and 75 grams. In some embodiments, the mass of the perimeter weights 132 can be between 5 grams and 10 grams, between 10 grams and 15 grams, between 15 grams and 20 grams, between 20 grams and 25 grams, between 25 grams and 30 grams, between 30 grams and 35 grams, between 35 grams and 40 grams, between 40 grams and 45 grams, between 45 grams and 50 grams, between 50 grams and 55 grams, between 60 grams and 65 grams, between 65 grams and 70 grams, or between 70 grams and 75 grams.

[0107] The perimeter weights 132 may further include a plurality of toe weights and a plurality of heel weights. The plurality of toe weights may include one or more weights located on the toe side of the GC plane 152. In some embodiments, the plurality of toe weights may include one weight, two weights, three weights, four weights, or five weights. In an exemplary embodiment, the plurality of toe weights may include one weight. The plurality of heel weights may include one or more weights located on the heel side of the GC plane 152. In some embodiments, the plurality of heel weights may include one weight, two weights, three weights, four weights, or five weights. In an exemplary embodiment, the plurality of toe weights may include one weight. The addition of the perimeter weights 132 may allow for a shift of weight toward the perimeter of a blade style club head, which may increase the MOI or forgiveness of the club head. The extended length may further allow for the placement of the perimeter weights to be further away from the CG plane 152. The extended length may further allow for the placement of the perimeter weights to be further away from the GC plane 152.

[0108] The outer weight 132 is located at the center of gravity (CG w "). CG w can be located away from the CG. More specifically, the location of the perimeter weights 132 can have the greatest effect on the MOIyy 138. Thus, the CG from the Y-axis 138 w The greater the distance, the greater the increase CG of MOI yy138. w The distance Y-axis 138 to the C-G can be between ±1.5 inches and ±3.5 inches. In some embodiments, the distance Y-axis 138 to the C-G wThe distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, between ±1.75 inches and ±2.00 inches, between 2.00 inches and ±2.25 inches, between ±2.25 inches and ±2.50 inches, between 2.50 inches and ±2.75 inches, between 2.75 inches and ±3.00 inches, between 3.00 inches and ±3.25 inches, or between ±3.25 inches and ±3.50 inches. In some embodiments, the distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, between ±1.75 inches and ±2.00 inches, between 2.00 inches and ±2.25 inches, between ±2.25 inches and ±2.50 inches, between 2.50 inches and ±2.75 inches, between 2.75 inches and ±3.00 inches, between 3.00 inches and ±3.25 inches, or between ±3.25 inches and ±3.50 inches. w The distance to can be greater than ±1.50 inches, greater than ±1.75 inches, greater than ±2.00 inches, greater than ±2.25 inches, greater than ±2.50 inches, greater than ±2.75 inches, greater than ±3.00 inches, or greater than ±3.25 inches.

[0109] A percentage of the total mass of the blade style club head 100 is located outside (toe or heel) of the first set of planes 182. In some embodiments, between 65% and 85% of the total mass is located outside the first set of planes 182. In some embodiments, the percentage of the total mass located outside the first set of planes 182 is between 65% and 70%, between 70% and 75%, between 75% and 80%, or between 80% and 85% of the total mass. In some embodiments, the percentage of the club head's total mass located outside the first set of planes 182 is greater than 65%, greater than 70%, greater than 75%, greater than 80%, or greater than 85%. In one exemplary embodiment, the percentage of mass located outside the first set of planes 182 is 75%.

[0110] A percentage of the total mass of the blade style club head 100 is located outside (toe or heel) of the second set of planes 184. In some embodiments, between 45% and 65% of the total mass is located outside the second set of planes 184. In some embodiments, the percentage of mass located outside the second set of planes 184 is between 45% and 50%, between 50% and 55%, between 55% and 60%, or between 60% and 65% of the total mass. In some embodiments, the percentage of the club head's mass located outside the second set of planes 184 is greater than 45%, greater than 50%, greater than 55%, greater than 60%, or greater than 65%. In one exemplary embodiment, the percentage of the total mass located outside the second set of planes 184 is 58%.

[0111] A percentage of the total mass of the blade style club head 100 is located outside (toe or heel) of the third set of planes 186. In some embodiments, between 30% and 50% of the total mass is located outside the third set of planes 186. In some embodiments, the percentage of mass located outside the third set of planes 186 is between 30% and 35%, between 35% and 40%, between 40% and 45%, or between 45% and 50% of the total mass. In some embodiments, the percentage of the club head's total mass located outside the third set of planes 186 is greater than 30%, greater than 35%, greater than 40%, greater than 45%, or greater than 50%. In one exemplary embodiment, the percentage of mass located outside the third set of planes 186 is 40%.

[0112] A percentage of the total mass of the blade style club head 100 is located outside (toe or heel) of the fourth set of planes 188. In some embodiments, between 5% and 25% of the total mass is located outside the fourth set of planes 188. In some embodiments, the percentage of the total mass located outside the fourth set of planes 188 is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside the fourth set of planes 188 is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%. In an exemplary embodiment, the percentage of the total mass located outside the fourth set of planes 188 is 17%.

[0113] The blade style club head 100 can have a depth 176 measured in a direction parallel to the Z-axis 140. The depth 176 can be between 1.40 inches and 1.80 inches. In some embodiments, the depth 176 can be between 1.40 inches and 1.45 inches, between 1.45 inches and 1.50 inches, between 1.50 inches and 1.55 inches, between 1.55 inches and 1.60 inches, between 1.60 inches and 1.65 inches, between 1.65 inches and 1.70 inches, between 1.70 inches and 1.75 inches, and between 1.75 inches and 1.80 inches. In one exemplary embodiment, the depth 176 is 1.650 inches.

[0114] The blade style club head 100 can have a height measured in a direction parallel to the Y-axis 138. The height 160 can be between 1.15 inches and 1.55 inches. In some embodiments, the height 160 can be between 1.15 inches and 1.20 inches, between 1.25 inches and 1.30 inches, between 1.30 inches and 1.35 inches, between 1.45 inches and 1.50 inches, between 1.40 inches and 1.45 inches, between 1.45 inches and 1.50 inches, and between 1.50 inches and 1.55 inches. In one exemplary embodiment, the height 160 is 1.344 inches.

[0115] In many embodiments, the blade style club head 100 can have a club head volume ranging between 50cc and 180cc. In some embodiments, the club head volume is between 50cc and 55cc, between 55cc and 60cc, between 60cc and 65cc, between 65cc and 70cc, between 70cc and 75cc, between 75cc and 80cc, between 80cc and 85cc, between 85cc and 90cc, between 90cc and 95cc, between 95cc and 100cc, between 100cc and 105cc, between 105cc and 110cc, between 110cc and 115cc, between 115cc and 120cc. The volume may range from between 120cc, between 120cc and 125cc, between 125cc and 130cc, between 130cc and 135cc, between 135cc and 140cc, between 140cc and 145cc, between 145cc and 150cc, between 150cc and 155cc, between 155cc and 160cc, between 160cc and 165cc, between 165cc and 170cc, between 170cc and 175cc, or between 175cc and 180cc. In some embodiments, the volume of the club head may be greater than 50cc, greater than 75cc, greater than 100cc, greater than 125cc, or greater than 150cc.

[0116] Blade style club head 100 is 800g*in 2 From 1500g*in 2 The moment of inertia (MOI) (MOIyy) about the Y-axis 138 can range from 800 g*in 2 and 825g*in 2 , 825g*in 2 and 850g*in 2 , 850g*in 2 and 875g*in 2 , 875g*in 2 and 900g*in 2 , 900g*in 2 and 925g*in 2 , 925g*in 2 and 950g*in 2, 950g*in 2 and 975g*in 2 , 975g*in 2 and 1000g*in 2 , 1000g*in 2 and 1025g*in 2 , 1025g*in 2 and 1050g*in 2 , 1050g*in 2 and 1075g*in 2 , 1075g*in 2 and 1100g*in 2 , 1100g*in 2 and 1125g*in 2 , 1125g*in 2 and 1150g*in 2 , 1150g*in 2 and 1175g*in 2 , 1175g*in 2 and 1200g*in 2 , 1200g*in 2 and 1225g*in 2 , 1225g*in 2 and 1250g*in 2 , 1250g*in 2 and 1275g*in 2 , 1275g*in 2 and 1300g*in 2 , 1300g*in 2 and 1325g*in 2 , 1325g*in 2 and 1450g*in 2 , 1350g*in 2 and 1375g*in 2 , 1375g*in 2 and 1400g*in 2 , 1400g*in 2 and 1425g*in 2 , 1425g*in 2 and 1450g*in 2 , 1450g*in 2 and 1475g*in 2 , or 1475g*in 2 and 1500g*in 2In some embodiments, the moment of inertia (MOI) about the Y-axis 138 (MOIyy) can be between 800 g*in 2 Larger, 900g*in 2 Larger, 1000g*in 2 Larger, 1100g*in 2 Larger, 1200g*in 2 Larger, 1300g*in 2 Larger or 1400g*in 2 In one exemplary embodiment, the moment of inertia (MOI) about the Y-axis 138 (MOIyy) is 1225 g*in 2 It is.

[0117] The blade style club head 100 is 100g*in 2 From 200g*in 2 The moment of inertia (MOI) (MOIxx) about the X-axis 136 can range from 100 g*in 2 and 125g*in 2 Between 125g*in 2 and 150g*in 2 Between 150g*in 2 and 175g*in 2 or 175g*in 2 and 200g*in 2 In one exemplary embodiment, the moment of inertia (MOI) about the X-axis 136 (MOIxx) can be between 135 g*in 2 It is.

[0118] The blade style club head 100 weighs 800g*in 2 From 1500g*in 2 The moment of inertia (MOI) about the Z-axis 140 (MOIzz) can range from 800 g*in 2 and 825g*in 2 , 825g*in 2 and 850g*in 2 , 850g*in 2and 875g*in 2 , 875g*in 2 and 900g*in 2 , 900g*in 2 and 925g*in 2 , 925g*in 2 and 950g*in 2 , 950g*in 2 and 975g*in 2 , 975g*in 2 and 1000g*in 2 , 1000g*in 2 and 1025g*in 2 , 1025g*in 2 and 1050g*in 2 , 1050g*in 2 and 1075g*in 2 , 1075g*in 2 and 1100g*in 2 , 1100g*in 2 and 1125g*in 2 , 1125g*in 2 and 1150g*in 2 , 1150g*in 2 and 1175g*in 2 , 1175g*in 2 and 1200g*in 2 , 1200g*in 2 and 1225g*in 2 , 1225g*in 2 and 1250g*in 2 , 1250g*in 2 and 1275g*in 2 , 1275g*in 2 and 1300g*in 2 , 1300g*in 2 and 1325g*in 2 , 1325g*in 2 and 1450g*in 2 , 1350g*in 2 and 1375g*in 2 , 1375g*in 2 and 1400g*in 2 , 1400g*in 2 and 1425g*in 2 , 1425g*in 2and 1450g*in 2 , 1450g*in 2 and 1475g*in 2 , or 1475g*in 2 and 1500g*in 2 The range may be between 0.01 and 0.1.

[0119] As mentioned above, CGx is the position of CG 148 relative to the X-axis 136 from the origin 158. In some embodiments, CGx can be between 0.00 inches and 0.10 inches. In some embodiments, CGx can be between 0.00 inches and 0.01 inches, between 0.01 inches and 0.02 inches, between 0.02 inches and 0.03 inches, between 0.03 inches and 0.04 inches, between 0.04 inches and 0.05 inches, between 0.05 inches and 0.06 inches, between 0.06 inches and 0.07 inches, between 0.07 inches and 0.08 inches, between 0.08 inches and 0.09 inches, or between 0.09 inches and 0.10 inches. In some embodiments, CGx may be less than 0.10 inches, less than 0.09 inches, less than 0.08 inches, less than 0.07 inches, less than 0.06 inches, less than 0.05 inches, less than 0.04 inches, less than 0.03 inches, less than 0.02 inches, or less than 0.01 inches. In one exemplary embodiment, CGx is 0.06 inches.

[0120] CGy, as mentioned above, is the CG position relative to the Y-axis 138 from the origin 158. As mentioned above, CGy is the CG position relative to the Y-axis 138 from the origin 158. In some embodiments, CGy can be between 0.3 inches and 0.90 inches. In some embodiments, CGy can be between 0.30 inches and 0.35 inches, between 0.35 inches and 0.40 inches, between 0.40 inches and 0.45 inches, between 0.45 inches and 0.50 inches, between 0.50 inches and 0.55 inches, between 0.55 inches and 0.60 inches, between 0.60 inches and 0.65 inches, between 0.65 inches and 0.70 inches, between 0.70 inches and 0.75 inches, between 0.75 inches and 0.80 inches, between 0.80 inches and 0.85 inches, or between 0.85 inches and 0.90 inches. In one exemplary embodiment, CGy is 0.615 inches.

[0121] CGz, as mentioned above, is the CG position relative to the Z axis 140 from the origin 158. As mentioned above, CGz is the CG position relative to the Z axis 140 from the origin 158. In some embodiments, CGz can be between -1.35 and -1.10 inches. In some embodiments, CGz can be between -0.35 inches and -0.40 inches, between -0.40 inches and -0.45 inches, between -0.45 inches and -0.50 inches, between -0.50 inches and -0.55 inches, between -0.55 inches and -0.60 inches, between -0.60 inches and -0.65 inches, between -0.65 inches and -0.70 inches, between ... The CGz may be between -0.75 inches and -0.75 inches, between -0.75 inches and -0.80 inches, between -0.80 inches and -0.85 inches, between -0.85 inches and -0.90 inches, between -0.90 inches and -0.95 inches, between -0.95 inches and -1.00 inches, between -1.00 inches and -1.05 inches, or between -1.05 inches and -1.10 inches. In one exemplary embodiment, CGz is -0.56 inches.

[0122] The blade-style club head 100 may further have an MOIyy / CGz ratio. It is noted that this ratio illustrates the uniqueness of the blade-style club head as described herein. The MOIyy / CGz of a blade-style club head is much greater than a conventional blade putter, and even greater than a conventional mallet putter. A conventional mallet putter has a higher MOIyy than a conventional blade putter. This is accomplished by increasing the depth of the putter. The blade-style club head described herein achieves an even greater MOIyy by increasing the length as opposed to the depth.

[0123] The increased length associated with the addition of perimeter weighting as discussed above allows blade-style club heads to achieve a greater MOIyy / CGz ratio, in some embodiments, the MOIyy / CGz ratio may be between 1600 and 2550. In some embodiments, the MOIyy / CGz ratio can be between 1600 and 1650, between 1650 and 1700, between 1700 and 1750, between 1750 and 1800, between 1800 and 1850, between 1850 and 1900, between 1900 and 1950, between 1950 and 2000, between 2000 and 2050, between 2050 and 2100, between 2100 and 2150, between 2150 and 2200, between 2200 and 2250, between 2250 and 2300, between 2300 and 2350, between 2350 and 2400, between 2450 and 2500, or between 2500 and 2550. In some embodiments, the MOIyy / CGz ratio can be greater than 1650, greater than 1750, greater than 1850, greater than 1950, greater than 2050, greater than 2150, greater than 2250, greater than 2350, greater than 2450, or greater than 2550. In one exemplary embodiment, the MOIyy / CGz ratio can be 2052.

[0124] As shown in FIG. 4, the blade style club head 100 can further have a loft plane 144 and a loft angle. The loft angle is the angle between the loft angle and the Y-axis 138. The loft angle is less than 10 degrees. In some embodiments, the loft angle of the blade style club head 100 can be between 0 and 5 degrees, between 0 and 6 degrees, between 0 and 7 degrees, or between 0 and 8 degrees. The loft angle of the club head 100 can be less than 10 degrees, less than 9 degrees, less than 8 degrees, less than 7 degrees, less than 6 degrees, or less than 5 degrees. The loft angle is selected based on the player's swing and preferences.

[0125] As shown in FIG. 8, the blade style club head 100 can further include a hosel 128 attached to the top rail 112. The hosel 128 is located closer to the heel 118 than to the toe 120. The hosel shape comprises a plumber neck. The hosel 128 further includes a hosel axis 154 that is concentric with the hosel 128, parallel to the Y-axis 138 and perpendicular to the X-axis 136. The hosel 128 is positioned at a distance (D h )174 away, D h 174 is the distance from the heel 118 to the hosel axis 154. In some embodiments, D h 174 may be between 0.75 inches and 2.25 inches. In some embodiments, D h 174 may be between 0.75 inches and 1.00 inches, between 1.00 inches and 1.25 inches, between 1.25 inches and 1.50 inches, between 1.50 inches and 1.75 inches, between 1.75 inches and 2.00 inches, or between 2.00 inches and 2.25 inches. D h 174 allows the hosel 128 to remain in a desired position relative to the sweet spot. h 174 also allows the enlarged shape, as described below, to not affect the desired feel and balance of the golf club during the swing.

[0126] 6, the blade style club head 100 further includes an alignment feature 126 that includes a single recess that extends perpendicular to the strike face 110 from the rear wall 135 to the rear 124. The alignment feature 126 is centered in the GC plane 125. The alignment feature 126 primarily assists in centering the player on the location of the face center 150 at address.

[0127] (B. Embodiment 2) 9, in another embodiment, a blade-style club head 200 can have similar features as the blade-style club head 100. Specifically, the blade-style club head 200 has a similar strike face (110, 210) formed on a front portion of a body (108, 208), a heel (118, 218), a toe (120, 220) opposite the heel (118, 218), a rear portion (124, 224) opposite the strike face (110, 210), and a toe (120, 220) opposite the strike face (110, 210). The club head includes a rear wall (125, 225), a top rail (112, 212) adjacent the strike face (110, 210) and disposed adjacent the rear wall (125, 225), a sole (122, 222) opposite the top rail (112, 212), and a leading edge (130, 230) adjacent the strike face (110, 210) and the sole (122, 222). Additionally, the blade-style club head 200 can have a length, height, depth, mass, and volume similar to the blade-style club head 100.

[0128] Compared with the embodiment 1 depicted in FIG. 2, the blade-style club head 200 has a different perimeter weight. As shown in FIG. 9, the perimeter weight 232 includes four cylindrical weights arranged in line with each other with respect to the X-axis. Furthermore, the perimeter weight 232 is located at the rear near the sole. The perimeter weight 232 can be located within 0.50 inches from the sole and 1.0 inches from the heel and toe. The location of the perimeter weight 232 allows the CG to be located low and rearward.

[0129] The perimeter weights 232 may further include a plurality of toe weights and a plurality of heel weights. The plurality of toe weights may include two weights located on the toe side of the GC plane 252. The plurality of heel weights may include two weights located on the heel side of the GC plane 252.

[0130] Each of the perimeter weights 232 can have a mass. In some embodiments, the mass of the perimeter weights 132 can be between 5 grams and 75 grams. In some embodiments, the mass of the perimeter weights 132 can be between 5 grams and 10 grams, between 10 grams and 15 grams, between 15 grams and 20 grams, between 20 grams and 25 grams, between 25 grams and 30 grams, between 30 grams and 35 grams, between 35 grams and 40 grams, between 40 grams and 45 grams, between 45 grams and 50 grams, between 50 grams and 55 grams, between 60 grams and 65 grams, between 65 grams and 70 grams, or between 70 grams and 75 grams. The perimeter weights 232 include tungsten.

[0131] The addition of perimeter weights 232 allows for the shifting of weight toward the perimeter of a blade-style club head, thereby increasing the MOI or forgiveness of the club head. w "). CG w can be located a distance away from the CG. More specifically, the location of the perimeter weights 232 can have the greatest effect on the MOIy. Thus, the CG from the Y axis w The greater the distance of the CG from the Y axis, the greater the increase in MOIy. wThe distance from the Y-axis 138 to the CGw can be between ±1.50 inches and ±1.75 inches, ±1.75 inches and ±2.00 inches, 2.00 inches and ±2.25 inches, ±2.25 inches and ±2.50 inches, 2.50 inches and ±2.75 inches, 2.75 inches and ±3.00 inches, 3.00 inches and ±3.25 inches, or ±3.25 inches and ±3.50 inches. In some embodiments, the distance from the Y-axis 138 to the CGw can be between ±1.50 inches and ±1.75 inches, ±1.75 inches and ±2.00 inches, 2.00 inches and ±2.25 inches, ±2.25 inches and ±2.50 inches, 2.50 inches and ±2.75 inches, 2.75 inches and ±3.00 inches, 3.00 inches and ±3.25 inches, or ±3.25 inches and ±3.50 inches. w The distance to can be greater than ±1.50 inches, greater than ±1.75 inches, greater than ±2.00 inches, greater than ±2.25 inches, greater than ±2.50 inches, greater than ±2.75 inches, greater than ±3.00 inches, or greater than ±3.25 inches.

[0132] A percentage of the total mass is located outside (toe or heel) of the first set of planes. In some embodiments, between 65% and 85% of the total mass is located outside of the first set of planes. In some embodiments, the percentage of the total mass located outside of the first set of planes is between 65% and 70%, between 70% and 75%, between 75% and 80%, or between 80% and 85% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the first set of planes is greater than 65%, greater than 70%, greater than 75%, greater than 80%, or greater than 85%.

[0133] A percentage of the total mass is located outside (toe or heel) of the second set of planes. In some embodiments, between 50% and 70% of the total mass is located outside of the second set of planes. In some embodiments, the percentage of the total mass located outside of the second set of planes is between 50% and 55%, between 55% and 60%, between 60% and 65%, or between 65% and 70% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the second set of planes is greater than 50%, greater than 55%, greater than 60%, or greater than 65%.

[0134] A percentage of the total mass is located outside (toe or heel) of the third set of planes. In some embodiments, between 25% and 55% of the total mass is located outside of the third set of planes. In some embodiments, the percentage of the total mass located outside of the third set of planes is between 25% and 35%, between 35% and 45%, or between 45% and 55% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the third set of planes is greater than 25%, greater than 35%, greater than 45%, or greater than 55%.

[0135] A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside of the fourth set of planes. In some embodiments, the percentage of the total mass located outside of the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%.

[0136] (C. Embodiment 3) 10, in another embodiment, a blade-style club head 300 can have similar features as the blade-style club head 100. Specifically, the blade-style club head 300 has a similar strike face (110, 310) formed on a front portion of a body (108, 308), a heel (118, 318), a toe (120, 320) opposite the heel (118, 318), a rear portion (124, 324) opposite the strike face (110, 310), and a toe (120, 320) opposite the strike face (110, 310). The club head includes a rear wall (125, 325), a top rail (112, 312) adjacent the strike face (110, 310) and disposed adjacent the rear wall (125, 325), a sole (122, 322) opposite the top rail (112, 312), and a leading edge (130, 330) adjacent the strike face (110, 310) and the sole (122, 322). Additionally, the blade-style club head 300 can have a length, height, depth, mass, and volume similar to the blade-style club head 100.

[0137] Compared to the embodiment 1 depicted in FIG. 2, the blade style club head 300 has a different perimeter weight. As shown in FIG. 10, the perimeter weight 332 has four cylindrical weights arranged in line with each other with respect to the X-axis. Furthermore, the perimeter weight 332 is located on the sole close to the rear. The perimeter weight 332 can be located within 0.50 inch from the rear and 1.0 inch from the heel and toe. The location of the perimeter weight 332 allows the CG to be located low and rearward.

[0138] The perimeter weights 332 may further include a plurality of toe weights and a plurality of heel weights. The plurality of toe weights may include two weights located on the toe side of the GC plane 352. The plurality of heel weights may include two weights located on the heel side of the GC plane 352.

[0139] Each of the perimeter weights 332 can have a mass. In some embodiments, the mass of the perimeter weights 332 can be between 5 grams and 75 grams. In some embodiments, the mass of each perimeter weight 332 can be between 5 grams and 10 grams, between 10 grams and 15 grams, between 15 grams and 20 grams, between 20 grams and 25 grams, between 25 grams and 30 grams, between 30 grams and 35 grams, between 35 grams and 40 grams, between 40 grams and 45 grams, between 45 grams and 50 grams, between 50 grams and 55 grams, between 60 grams and 65 grams, between 65 grams and 70 grams, or between 70 grams and 75 grams. The perimeter weights 332 include tungsten.

[0140] The addition of perimeter weights 332 allows for the shifting of weight toward the perimeter of a blade-style club head, thereby increasing the MOI or forgiveness of the club head. w "). w can be located a distance away from the CG. More specifically, the location of the perimeter weights 332 can have the greatest effect on the MOIyy. Thus, the CG from the Y axis w The greater the distance from the Y axis to the CG, the greater the increase in MOIyy. w The distance from the Y axis to the CG can be between ±1.5 inches and ±3.5 inches. w The distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, ±1.75 inches and ±2.00 inches, 2.00 inches and ±2.25 inches, ±2.25 inches and ±2.50 inches, 2.50 inches and ±2.75 inches, 2.75 inches and ±3.00 inches, 3.00 inches and ±3.25 inches, or ±3.25 inches and ±3.50 inches. In some embodiments, the distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, ±1.75 inches and ±2.00 inches, 2.00 inches and ±2.25 inches, ±2.25 inches and ±2.50 inches, 2.50 inches and ±2.75 inches, 2.75 inches and ±3.00 inches, 3.00 inches and ±3.25 inches, or ±3. wThe distance to can be greater than ±1.50 inches, greater than ±1.75 inches, greater than ±2.00 inches, greater than ±2.25 inches, greater than ±2.50 inches, greater than ±2.75 inches, greater than ±3.00 inches, or greater than ±3.25 inches.

[0141] A percentage of the total mass is located outside (toe or heel) of the first set of planes. In some embodiments, between 65% and 85% of the total mass is located outside of the first set of planes. In some embodiments, the percentage of the total mass located outside of the first set of planes is between 65% and 70%, between 70% and 75%, between 75% and 80%, or between 80% and 85% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the first set of planes is greater than 65%, greater than 70%, greater than 75%, greater than 80%, or greater than 85%.

[0142] A percentage of the total mass is located outside (toe or heel side) of the second set of planes. In some embodiments, between 50% and 70% of the total mass is located outside of the second set of planes. In some embodiments, the percentage of the total mass located outside of the second set of planes is between 50% and 55%, between 55% and 60%, between 60% and 65%, or between 65% and 70% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the second set of planes is greater than 50%, greater than 55%, greater than 60%, or greater than 65%.

[0143] A percentage of the total mass is located outside (toe or heel) of the third set of planes. In some embodiments, between 25% and 55% of the total mass is located outside of the third set of planes. In some embodiments, the percentage of the total mass located outside of the third set of planes is between 25% and 35%, between 35% and 45%, or between 45% and 55% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the third set of planes is greater than 25%, greater than 35%, greater than 45%, or greater than 55%.

[0144] A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside of the fourth set of planes. In some embodiments, the percentage of the total mass located outside of the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%.

[0145] (D. Embodiment 4) 11 , in another embodiment, a blade-style club head 400 can have similar features as the blade-style club head 100. Specifically, the blade-style club head 400 has a similar strike face (110, 410) formed on a front portion of a body (108, 408), a heel (118, 418), a toe (120, 420) opposite the heel (118, 418), a rear portion (124, 424) opposite the strike face (110, 410), and a toe (120, 420) opposite the strike face (110, 410). The club head includes a rear wall (125, 425), a top rail (112, 412) adjacent the strike face (110, 410) and disposed adjacent the rear wall (125, 425), a sole (122, 422) opposite the top rail (112, 412), and a leading edge (130, 430) adjacent the strike face (110, 410) and the sole (122, 422). Additionally, the blade-style club head 400 can have a length, height, depth, mass, and volume similar to the blade-style club head 100.

[0146] Compared to the first embodiment depicted in FIG. 2, the blade-style club head 400 has a different perimeter weight. As shown in FIG. 11, the perimeter weight 432 includes four cylindrical weights aligned with each other with respect to the X-axis. Furthermore, the perimeter weight 432 is located on the sole close to the rear. The perimeter weight 432 includes a single rod-shaped weight that forms part of the rear. The position of the perimeter weight 432 allows the CG to be located low and rearward.

[0147] Each of the perimeter weights 432 may have a mass. In some embodiments, the mass of the perimeter weights 432 may be between 25 grams and 75 grams. In some embodiments, the mass of each perimeter weight 332 may be between 25 grams and 30 grams, between 30 grams and 35 grams, between 35 grams and 40 grams, between 40 grams and 45 grams, between 45 grams and 50 grams, between 50 grams and 55 grams, between 60 grams and 65 grams, between 65 grams and 70 grams, or between 70 grams and 75 grams. The perimeter weights 432 include tungsten.

[0148] The addition of perimeter weights 432 allows for the shifting of weight toward the perimeter of a blade-style club head, thereby increasing the MOI or forgiveness of the club head. w "). w can be located a distance away from the CG. More specifically, the location of the perimeter weights 332 can have the greatest effect on the MOIyy. Thus, the CG from the Y axis w The greater the distance from the Y axis to the CG, the greater the increase in MOIyy. w The distance Y-axis from the CG can be between ±0.00 inches and ±3.50 inches. In some embodiments, the distance Y-axis from the CG w The distance from the Y-axis 138 to the CG can be between 0.00 inches and ±0.25 inches, between ±0.25 inches and ±0.50 inches, between 0.50 inches and ±0.75 inches, between 0.75 inches and ±1.00 inches, between 1.00 inches and ±1.25 inches, between ±1.25 inches and ±1.50 inches, between ±1.50 inches and ±1.75 inches, between ±1.75 inches and ±2.00 inches, between 2.00 inches and ±2.25 inches, between ±2.25 inches and ±2.50 inches, between 2.50 inches and ±2.75 inches, between 2.75 inches and ±3.00 inches, between 3.00 inches and ±3.25 inches, or between ±3.25 inches and ±3.50 inches.w The distance to can be greater than ±0.50 inches, greater than ±1.00 inches, greater than ±1.50 inches, greater than ±2.00 inches, greater than ±2.50 inches, greater than ±3.00 inches, or greater than ±3.50 inches.

[0149] A percentage of the total mass is located outside (toe or heel) of the first set of planes. In some embodiments, between 65% and 85% of the total mass is located outside of the first set of planes. In some embodiments, the percentage of the total mass located outside of the first set of planes is between 65% and 70%, between 70% and 75%, between 75% and 80%, or between 80% and 85% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the first set of planes is greater than 65%, greater than 70%, greater than 75%, greater than 80%, or greater than 85%.

[0150] A percentage of the total mass is located outside (toe or heel) of the second set of planes. In some embodiments, between 45% and 65% of the total mass is located outside of the second set of planes. In some embodiments, the percentage of the total mass located outside of the second set of planes is between 45% and 50%, between 50% and 55%, between 55% and 60%, or between 60% and 65% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the second set of planes is greater than 45%, greater than 50%, greater than 55%, greater than 60%, or greater than 65%.

[0151] A percentage of the total mass is located outside (toe or heel) of the third set of planes. In some embodiments, between 25% and 55% of the total mass is located outside of the third set of planes. In some embodiments, the percentage of the total mass located outside of the third plane is between 25% and 30%, between 30% and 35%, between 35% and 40%, between 40% and 45% or less, between 45% and 50%, or between 50% and 55% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the third set of planes is greater than 25%, greater than 35%, greater than 45%, or greater than 55%.

[0152] A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside of the fourth set of planes. In some embodiments, the percentage of the total mass located outside of the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%.

[0153] (E. Embodiment 5) 12, in another embodiment, the blade style club head 500 can have similar features to the blade style club head 100. Specifically, the blade style club head 500 has a similar (110, 510) formed on a front portion of the body (108, 508), a heel (118, 518), a toe (120, 520) opposite the heel (118, 518), a rear portion (124, 524) opposite the strike face (110, 510), and a rear wall (124, 524) opposite the strike face (110, 510). The blade-style club head 500 may have a length, height, depth, mass, and volume similar to the blade-style club head 100.

[0154] Compared to embodiment 1 depicted in Figure 2, the blade style club head 500 has a different perimeter weighting. As shown in Figure 12, the perimeter weighting 532 constitutes a portion of the heel and a portion of the toe. The location of the perimeter weighting 532 allows the majority of the mass to be located as far away from the CG as possible, which can increase the MOIyy.

[0155] Each of the perimeter weights 532 can have a mass. In some embodiments, the mass of the perimeter weights 532 can be between 20 grams and 75 grams. In some embodiments, the mass of each perimeter weight 532 can be between 20 grams and 25 grams, between 25 grams and 30 grams, between 30 grams and 35 grams, between 35 grams and 40 grams, between 40 grams and 45 grams, between 45 grams and 50 grams, between 50 grams and 55 grams, between 60 grams and 65 grams, between 65 grams and 70 grams, or between 70 grams and 75 grams. The perimeter weights 532 include tungsten.

[0156] The addition of perimeter weights 532 allows for the shifting of weight toward the perimeter of a blade-style club head, thereby increasing the MOI or forgiveness of the club head. w "). CG w can be located a distance away from the CG. More specifically, the location of the perimeter weights 532 can have the greatest effect on the MOIyy. Thus, the CG from the Y axis w The greater the distance from the Y axis to the CG, the greater the increase in MOIyy. w The distance from the Y axis to the CG can be between ±1.5 inches and ±3.5 inches. w The distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, ±1.75 inches and ±2.00 inches, 2.00 inches and ±2.25 inches, ±2.25 inches and ±2.50 inches, 2.50 inches and ±2.75 inches, 2.75 inches and ±3.00 inches, 3.00 inches and ±3.25 inches, or ±3.25 inches and ±3.50 inches. In some embodiments, the distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, ±1.75 inches and ±2.00 inches, 2.00 inches and ±2.25 inches, ±2.25 inches and ±2.50 inches, 2.50 inches and ±2.75 inches, 2.75 inches and ±3.00 inches, 3.00 inches and ±3.25 inches, or ±3. w The distance to can be greater than ±1.50 inches, greater than ±1.75 inches, greater than ±2.00 inches, greater than ±2.25 inches, greater than ±2.50 inches, greater than ±2.75 inches, greater than ±3.00 inches, or greater than ±3.25 inches.

[0157] A percentage of the total mass is located outside (toe or heel) of the first set of planes. In some embodiments, between 65% and 85% of the total mass is located outside of the first set of planes. In some embodiments, the percentage of the total mass located outside of the first set of planes is between 65% and 70%, between 70% and 75%, between 75% and 80%, or between 80% and 85% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the first set of planes is greater than 65%, greater than 70%, greater than 75%, greater than 80%, or greater than 85%.

[0158] A percentage of the total mass is located outside (toe or heel) of the second set of planes. In some embodiments, between 50% and 70% of the total mass is located outside of the second set of planes. In some embodiments, the percentage of the total mass located outside of the second set of planes is between 50% and 55%, between 55% and 60%, between 60% and 65%, or between 65% and 70% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the second set of planes is greater than 50%, greater than 55%, greater than 60%, or greater than 65%.

[0159] A percentage of the total mass is located outside (toe or heel) of the third set of planes. In some embodiments, between 25% and 55% of the total mass is located outside of the third set of planes. In some embodiments, the percentage of the total mass located outside of the third set of planes is between 25% and 35%, between 35% and 45%, or between 45% and 55% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the third set of planes is greater than 25%, greater than 35%, greater than 45%, or greater than 55%.

[0160] A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside of the fourth set of planes. In some embodiments, the percentage of the total mass located outside of the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%.

[0161] A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside of the fourth set of planes. In some embodiments, the percentage of the total mass located outside of the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%.

[0162] (F. Embodiment 6) 13, in another embodiment, a blade style club head 600 can have similar features as the blade style club head 100. Specifically, the blade style club head 600 has a similar strike face (110, 610) formed on a front portion of a body (108, 608), a heel (118, 618), a toe (120, 620) opposite the heel (118, 618), a rear portion (124, 624) opposite the strike face (110, 610), and a rear wall (124, 624) opposite the strike face (110, 610). (125, 625), a top rail (112, 612) adjacent the strike face (110, 610) and disposed adjacent the rear wall (125, 625), a sole (122, 622) opposite the top rail (112, 612), and a leading edge (130, 630) adjacent the strike face (110, 610) and the sole (122, 622). Additionally, the blade-style club head 600 can have a length, height, depth, mass, and volume similar to the blade-style club head 100.

[0163] Compared to the first embodiment shown in Figure 2, the blade style club head 600 has a different perimeter weight. As shown in Figure 9, the perimeter weight 632 comprises a portion of the toe, a portion of the sole, and a portion of the heel. The perimeter weight 632 can comprise the rearmost portions of the toe and heel. The position of the perimeter weight 632 can position the CG lower and further back.

[0164] Each of the perimeter weights 632 can have a mass. In some embodiments, the mass of the perimeter weights 632 can be between 20 grams and 75 grams. In some embodiments, the mass of each perimeter weight 632 can be between 20 grams and 25 grams, between 25 grams and 30 grams, between 30 grams and 35 grams, between 35 grams and 40 grams, between 40 grams and 45 grams, between 45 grams and 50 grams, between 50 grams and 55 grams, between 60 grams and 65 grams, between 65 grams and 70 grams, or between 70 grams and 75 grams. The perimeter weights 632 include tungsten.

[0165] The addition of perimeter weights 632 allows for the shifting of weight toward the perimeter of a blade-style club head, thereby increasing the MOI or forgiveness of the club head. w "). CG w can be located a distance away from the CG. More specifically, the location of the perimeter weights 632 can have the greatest effect on the MOIyy. Thus, the CG from the Y axis w The greater the distance from the Y axis to the CG, the greater the increase in MOIyy. w The distance from the Y axis to the CG can be between ±1.5 inches and ±3.5 inches. w The distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, between ±1.75 inches and ±2.00 inches, between 2.00 inches and ±2.25 inches, between ±2.25 inches and ±2.50 inches, between 2.50 inches and ±2.75 inches, between 2.75 inches and ±3.00 inches, between 3.00 inches and ±3.25 inches, or between ±3.25 inches and ±3.50 inches. In some embodiments, the distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, between ±1.75 inches and ±2.00 inches, between 2.00 inches and ±2.25 inches, between ±2.25 inches and ±2.50 inches, between 2.50 inches and ±2.75 inches, between 2.75 inches and ±3.00 inches, between 3.00 inches and ±3.25 inches, or between ±3.25 inches and ±3.50 inches. wThe distance to can be greater than ±1.50 inches, greater than ±1.75 inches, greater than ±2.00 inches, greater than ±2.25 inches, greater than ±2.50 inches, greater than ±2.75 inches, greater than ±3.00 inches, or greater than ±3.25 inches.

[0166] A percentage of the total mass is located outside (toe or heel) of the first set of planes. In some embodiments, between 65% and 85% of the total mass is located outside of the first set of planes. In some embodiments, the percentage of the total mass located outside of the first set of planes is between 65% and 70%, between 70% and 75%, between 75% and 80%, or between 80% and 85% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the first set of planes is greater than 65%, greater than 70%, greater than 75%, greater than 80%, or greater than 85%.

[0167] A percentage of the total mass is located outside (toe or heel) of the second set of planes. In some embodiments, between 50% and 70% of the total mass is located outside of the second set of planes. In some embodiments, the percentage of the total mass located outside of the second set of planes is between 50% and 55%, between 55% and 60%, between 60% and 65%, or between 65% and 70% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the second set of planes is greater than 50%, greater than 55%, greater than 60%, or greater than 65%.

[0168] A percentage of the total mass is located outside (toe or heel) of the third set of planes. In some embodiments, between 25% and 55% of the total mass is located outside of the third set of planes. In some embodiments, the percentage of the total mass located outside of the third set of planes is between 25% and 35%, between 35% and 45%, or between 45% and 55% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the third set of planes is greater than 25%, greater than 35%, greater than 45%, or greater than 55%.

[0169] A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside of the fourth set of planes. In some embodiments, the percentage of the total mass located outside of the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%.

[0170] A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside of the fourth set of planes. In some embodiments, the percentage of the total mass located outside of the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%.

[0171] (G. Embodiment 7) With reference to FIG. 14, in another embodiment, a blade style club head 700 can have similar features as the blade style club head 100 . Specifically, the blade-style club head 700 includes a similar strike face formed on a front portion of a body, a heel (118, 718), a toe (120, 720) opposite the heel (118, 718), a rear portion (124, 724) opposite the strike face (110, 710), a rear wall (125, 725) opposite the strike face (110, 710), a top rail (112, 712) adjacent the strike face (110, 710) and disposed adjacent the rear wall (125, 725), a sole (122, 722) opposite the top rail (112, 712), and a leading edge (130, 730) adjacent the strike face (110, 710) and the sole (122, 722). Additionally, the blade style club head 700 may have a similar length, height, depth, mass, and volume as the blade style club head 100 .

[0172] Compared to embodiment 1 depicted in FIG. 2, the blade-style club head 700 has a different perimeter weight. As shown in FIG. 14, the perimeter weight 732 includes two weights located on the strike face. Furthermore, the perimeter weight 732 is located near the sole and toe. The perimeter weight 732 can be located within 0.50 inches from the sole and 0.50 inches from the heel and toe. The location of the perimeter weight 532 allows the majority of the mass to be located as far away from the CG as possible, which can increase the MOIyy.

[0173] Each of the perimeter weights 732 can have a mass. In some embodiments, the mass of the perimeter weights 732 can be between 20 grams and 75 grams. In some embodiments, the mass of each perimeter weight 732 can be between 20 grams and 25 grams, between 25 grams and 30 grams, between 30 grams and 35 grams, between 35 grams and 40 grams, between 40 grams and 45 grams, between 45 grams and 50 grams, between 50 grams and 55 grams, between 60 grams and 65 grams, between 65 grams and 70 grams, or between 70 grams and 75 grams. The perimeter weights 732 include tungsten.

[0174] The addition of perimeter weights 732 allows for the shifting of weight toward the perimeter of a blade-style club head, thereby increasing the MOI or forgiveness of the club head. w The CGw can be located at a distance from the CG. More specifically, the location of the perimeter weights 632 can have the greatest effect on the MOIyy. Thus, the CG from the Y axis can be w The greater the distance from the Y axis to the CG, the greater the increase in MOIyy. w The distance from the Y axis to the CG can be between ±1.5 inches and ±3.5 inches. w The distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, ±1.75 inches and ±2.00 inches, 2.00 inches and ±2.25 inches, ±2.25 inches and ±2.50 inches, 2.50 inches and ±2.75 inches, 2.75 inches and ±3.00 inches, 3.00 inches and ±3.25 inches, or ±3.25 inches and ±3.50 inches. In some embodiments, the distance from the Y-axis 138 to the CG can be between ±1.50 inches and ±1.75 inches, ±1.75 inches and ±2.00 inches, 2.00 inches and ±2.25 inches, ±2.25 inches and ±2.50 inches, 2.50 inches and ±2.75 inches, 2.75 inches and ±3.00 inches, 3.00 inches and ±3.25 inches, or ±3. w The distance to can be greater than ±1.50 inches, greater than ±1.75 inches, greater than ±2.00 inches, greater than ±2.25 inches, greater than ±2.50 inches, greater than ±2.75 inches, greater than ±3.00 inches, or greater than ±3.25 inches.

[0175] A percentage of the total mass is located outside (toe or heel) of the first set of planes. In some embodiments, between 65% and 85% of the total mass is located outside of the first set of planes. In some embodiments, the percentage of the total mass located outside of the first set of planes is between 65% and 70%, between 70% and 75%, between 75% and 80%, or between 80% and 85% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the first set of planes is greater than 65%, greater than 70%, greater than 75%, greater than 80%, or greater than 85%.

[0176] A percentage of the total mass is located outside (toe or heel) of the second set of planes. In some embodiments, between 50% and 70% of the total mass is located outside of the second set of planes. In some embodiments, the percentage of the total mass located outside of the second set of planes is between 50% and 55%, between 55% and 60%, between 60% and 65%, or between 65% and 70% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the second set of planes is greater than 50%, greater than 55%, greater than 60%, or greater than 65%.

[0177] A percentage of the total mass is located outside (toe or heel) of the third set of planes. In some embodiments, between 25% and 55% of the total mass is located outside of the third set of planes. In some embodiments, the percentage of the total mass located outside of the third set of planes is between 25% and 35%, between 35% and 45%, or between 45% and 55% of the total mass. In some embodiments, the percentage of the club head's total mass located outside of the third set of planes is greater than 25%, greater than 35%, greater than 45%, or greater than 55%.

[0178] A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside the fourth set of planes. In some embodiments, the percentage of mass located outside the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%.

[0179] A percentage of the total mass is located outside (toe or heel) of the fourth set of planes. In some embodiments, between 5% and 25% of the total mass is located outside the fourth set of planes. In some embodiments, the percentage of mass located outside the fourth set of planes is between 5% and 10%, between 10% and 15%, between 15% and 20%, or between 20% and 25% of the total mass. In some embodiments, the percentage of the club head's total mass located outside the fourth set of planes is greater than 5%, greater than 10%, greater than 15%, greater than 20%, or greater than 25%.

[0180] II. EXAMPLES A. Example 1 Example 1 shows comparative results regarding CG location and MOI between a first exemplary club head and a conventional blade-style club head (also referred to as a "control blade"). Described herein is a first exemplary blade-style club head (also referred to as a "test blade") that has similar dimensions and physical characteristics as blade-style club head 100.

[0181] Conventional blade-type putters have an average length of 4.5 inches, a depth ranging from about 0.5 inches to 1.75 inches, and a height ranging from about 0.80 inches to 1.00 inches. The control blade may have the following physical dimensions: length 4.57 inches, depth 1.11 inches, and height 0.92 inches. The test blade may have the following physical dimensions: length 6.000 inches, depth 1.650 inches, and height 1.344 inches. A direct comparison of the test blades and the control blades can be seen in Table 1 below. [Table 1]

[0182] The test blade is 31.29% longer, 48.65% deeper, and 46.09% taller than the control blade. This increase in length, along with the placement of mass in a zone further away from the central axis of the putter, results in the placement of the CG of the blade style club head further down and further back. This placement of mass results in a higher MOIyy for the test blade compared to the test blade. Additionally, as shown in FIG. 1, the hosel of the test blade is located at the same point relative to the CG of the club head as a traditional blade style golf club head. This ensures that the test blade still has the same toe hang associated with a traditional blade style golf club head.

[0183] Although the large blade style putter is very similar to the traditional style blade putter in terms of its design, the large blade style putter has a significantly larger ratio of the club head moment of inertia (MOIyy) about the Y axis to the club head center of gravity (CGz) in the z direction. In this embodiment, the increase in the MOIyy / CGz ratio is achieved by increasing the length, depth, and width dimensions of the large blade style putter, as well as the introduction of peripheral toe and heel weights. The larger dimensions of the test blade allow the club head to achieve an 80.67% larger moment of inertia about the Y axis compared to the control blade. Furthermore, the ratio of MOIyy / CGz of the test blade is 37.90% larger compared to the control blade. This larger ratio of MOIyy to CGz directly translates into the test blade club head being more forgiving than the control blade club head, as it helps prevent unwanted rotation about the Y axis (sole to crown) and ensures that the strike face is square at impact.

[0184] Additionally, the increased dimensions when combined with perimeter weighting further move mass from the club center of gravity in the heel and toe directions compared to a conventional blade style golf club head. In embodiment 1, 75.2% of the total mass is outside the first plane perpendicular to the strike face and 1 inch from the geometric center of the club head. Additionally, 57.5% of the total mass is outside the second plane perpendicular to the strike face and 1.5 inches from the geometric center of the club head. Additionally, 39.7% of the total mass is outside the third plane perpendicular to the strike face and 2 inches from the geometric center of the club head. Finally, 17.2% of the total mass is outside the fourth plane perpendicular to the strike face and 2.5 inches from the geometric center of the club head. As summarized in Table 1 above, compared to the control blade, the test blade has more mass outside the first, second, third, and fourth planes.

[0185] B. Example 2 Several tests were conducted to demonstrate that users experience significant improvements in putting when using the test blade described above. The test blade in this example matched the first exemplary putter-type golf club head described in Example 1 above, and had the same 35-inch shaft, standard grip, loft, and lie as the control blade. In the tests, users of various skill levels attempted putts with both putters from several distances, including long putts from over 20 feet, medium length putts from 10-20 feet, and short putts from within 10 feet of the target.

[0186] Testing was done with a mix of blades, with some users completing one test with the test blade. Following the first test, a second and third test was done with the control blade. Finally, they tested again with the test blade and the test was finished (fourth test). Other users did the opposite (one test with the control blade, two tests with the control blade, and finished with a fourth test with the test blade).

[0187] The test results summarized in Figure 15a indicate that users performed better with the test blade compared to the control blade, making an average of 3.41 fewer putts per 100 attempts. Additionally, as shown in Figure 15c, putts using the test blade resulted in every putt being 0.03 feet closer to the hole after the putt, on average, and this trend occurred for short, medium, and long putts. Figure 15e shows that putts were taken 0.05 feet less offline with the test blade compared to the control blade. As demonstrated by the data shown in Figures 15a-15e, the test blade achieved superior performance compared to the control blade in terms of number of putts, closeness of putts to the hole, and offline putt distance.

[0188] C. Example 3 Example 3 shows the comparison results for CG position and MOI between a first exemplary blade-style golf club head and a conventional mallet-style golf club head (also referred to as a "control mallet"). Described herein is a first exemplary blade-style club head (also referred to as a "test blade") that has similar dimensions and physical characteristics as blade-style club head 100.

[0189] Traditional mallet style putters typically have a higher MOI than blade style putters. This higher MOI is typically achieved by increasing the depth of the putter and placing more weight behind the strike face of the club. This higher MOI translates to a mallet putter being more forgiving compared to a blade style putter. However, with simple geometric modifications made to arrive at the test blade, embodiments are able to achieve better performance by incorporating the forgiveness typically associated with higher MOI mallet style putters into a blade style putter. Traditional mallet type putters have an average length ranging from 3.5 to 4.5 inches, a depth ranging from about 2 inches to 5 inches, and a height ranging from about 0.80 inches to 1.00 inches. The control mallet may have the following physical dimensions: a length of 3.90 inches, a depth of 3.71 inches, and a height of 1.00 inches.

[0190] The control mallet was compared to the test blade described in Example 1. The test blade was similar to the golf club head 100 of Example 1 described above and had a length of 6.000 inches, a depth of 1.650 inches, and a height of 1.344 inches. A direct comparison of the test blade and the control mallet can be seen in Table 2 below. [Table 2]

[0191] The test blade is 53.85% longer, 55.16% less deep, and 38.56% taller than the control mallet. This increase in length, along with the placement of mass in an area further from the central axis of the putter, results in the CG of the blade-style club head being located lower and further back. This placement of mass creates a larger MOIyy for the test blade compared to the test mallet. Additionally, as shown in FIG. 1, the hosel of the test blade is located at the same point relative to the club head CG as a traditional blade-style golf club head. This ensures that the test blade still has the toe hang associated with a traditional blade-style golf club head.

[0192] The large blade style putter has a significantly larger ratio of the club head moment of inertia (MOIyy) with respect to the Y-axis to the club head center of gravity (CGz) in the z-direction when compared to the control mallet. In this embodiment, the increased MOIyy / CGz ratio is achieved by increasing the length and width dimensions of the large blade style putter with respect to the control mallet, as well as by introducing peripheral toe and heel weights. The larger dimensions of the test blade allow the test blade club head to achieve a 23.12% larger moment of inertia with respect to the Y-axis compared to the control blade, as discussed above. Furthermore, the test blade club head has a 356.87% larger MOIyy / CGz ratio compared to the control mallet club head. This larger ratio of MOIyy over CGz directly translates to the test blade club head being more forgiving than the control mallet club head, as it helps prevent unwanted rotation about the Y-axis (sole to crown) and ensures that the strike face is square at impact.

[0193] Additionally, the increased dimensions of the test blade, when combined with the perimeter weighting, move the mass further away from the club's center of gravity in the heel and toe directions compared to a conventional mallet style golf club head. In embodiment 1, 75.2% of the total mass is outside the first plane perpendicular to the strike face and 1 inch from the club head's geometric center. Additionally, 57.5% of the total mass is outside the second plane perpendicular to the strike face and 1.5 inches from the club head's geometric center. Additionally, 39.7% of the total mass is outside the third plane perpendicular to the strike face and 2 inches from the club head's geometric center. Finally, 17.2% of the total mass is outside the fourth plane perpendicular to the strike face and 2.5 inches from the club head's geometric center. As seen in Table 2 above, the test blade has more mass outside the first, second, third and fourth planes when compared to the control mallet.

[0194] D. Example 4 Several tests were conducted to demonstrate that users experience significant improvements in putting when using the test blade described above. The test blade in this example matched the first exemplary putter-type golf club head described in Example 1 above, and had the same 35-inch shaft, standard grip, loft, and lie as the control blade. In the tests, users of various skill levels attempted putts with both putters from several distances, including long putts from over 20 feet, medium length putts from 10-20 feet, and short putts from within 10 feet of the target.

[0195] Testing was done with a mix of blades, with some users completing one test with the test blade. Following the first test, a second and third test was done with the control mallet. Finally, the test was done again with the test blade (fourth test). Other users did the opposite (one test with the control blade, two tests with the control mallet, and finished the fourth test with the test blade).

[0196] These test results, summarized in FIG. 16a, show that users hit better putts with the test blade compared to the control mallet, hitting 4.55 more putts per 100 attempts using the test blade. FIG. 16c shows that, on average, users putts 0.2 feet closer to the hole with the test blade compared to the control mallet. FIG. 16e shows that putts were also 0.03 feet less off-line with the test blade compared to the control mallet. As demonstrated by the data shown in FIGs. 16a-16e, the test blade achieved superior performance compared to the control mallet in terms of number of putts, closeness of putts to the hole, and distance of putts off-line. FIG. 16e shows that putts were also 0.03 feet less off-line with the test blade compared to the control mallet. As demonstrated by the data shown in FIGs. 16a-16e, the test blade achieved superior performance compared to the control mallet in terms of number of putts, closeness of putts to the hole, and distance of putts off-line.

[0197] (Provisions) (Clause 1) A blade-style putter-type club head, comprising: a strike face, a rear portion opposite the strike face, a heel, a toe opposite the heel, a top rail, a sole, a hosel, an outer perimeter weight, a center of gravity (CG position) of the club head, and an XYZ coordinate system, the origin of which is determined at the center point of the leading edge of the blade-style putter-type club head, the XYZ coordinate system having an X-axis, a Y-axis, and a Z-axis, the horizontal X-axis extending from the heel to the toe, the vertical Y-axis extending from the sole to the top rail, and the horizontal Z-axis extending from the strike face to the rear, and a moment of inertia MOIyy about the Y-axis being 1000 g*in 2 1. A blade-style putter-type club head having an XYZ coordinate system and a length, the length being measured in a direction parallel to the X-axis from the outermost point of the toe to the outermost point of the heel, the length being greater than 5.00 inches.

[0198] (Clause 2) A blade-style putter-type club head as described in Clause 1, wherein the CG position is defined by points CGx, CGy, and CGz corresponding to points on the X-axis, Y-axis, and Z-axis, respectively, where CGx is measured from the origin parallel to the X-axis, CGy is measured from the origin parallel to the Y-axis, and CGz is measured from the origin parallel to the Z-axis, where CGx is between 0.00 inches and 0.10 inches, CGy is between 0.30 inches and 0.90 inches, and CGz is between -0.35 inches and -1.10 inches.

[0199] (Clause 3) A blade-style putter-type club head as described in Clause 2, further comprising an MOIyy / CGz ratio of greater than 1600.

[0200] (Clause 4) The moment of inertia MOIxx about the X-axis is 100g*in 2 A larger, blade-style putter-type clubhead as described in Clause 1.

[0201] (Clause 5) Moment of inertia around the Z axis is 1000g*in 2 A larger, blade-style putter-type clubhead as described in Clause 1.

[0202] (Clause 6) A blade-style putter-type club head as described in Clause 1, characterized in that the perimeter weighting comprises one or more perimeter weights.

[0203] (Clause 7) The hosel has a hosel axis, the hosel axis is concentric with the hosel and parallel to the Y axis, and the hosel axis is a distance D from the heel. h at a distance D h A blade-style putter-type club head as described in Clause 1, which has a club head length greater than 1.00 inch.

[0204] (Clause 8) A blade-style putter-type club head as described in Clause 1, wherein the perimeter weight is integral with the blade-style putter-type club head.

[0205] (Clause 9) A blade-style putter-type club head as described in Clause 1, in which the perimeter weighting forms the heel, toe, sole, and strike face or any part thereof.

[0206] (Clause 10) A blade-style putter-type club head having a strike face, a rear portion opposite the strike face, a heel, a toe opposite the heel, a top rail, a sole opposite the top rail, a hosel, perimeter weighting, a total mass, a club head center of gravity (CG position), a GC plane, the GC plane being a central plane extending from the strike face toward the rear, a first set of planes, a second set of planes, a third set of planes, and a fourth set of planes, the first set of planes being located at a distance L1 from the GC plane, the second set of planes being located at a distance L3 from the GC plane, the third set of planes being located at a distance L5 from the GC plane, and the fourth set of planes being located at a distance L7 from the GC plane, and 30% to 50% of the total mass being located outside the third set of planes, which is 5% to 25% of the total mass.

[0207] (Clause 11) The blade-style putter-type club head according to Clause 10, wherein distance L1 is 1.0 inch, distance L3 is 1.5 inches, distance L5 is 2.0 inches, and distance L7 is 2.5 inches.

[0208] (Clause 12) A blade-style putter-type club head as described in Clause 10, further comprising:

[0209] The XYZ coordinate system has an origin defined at the center point of the leading edge of a blade-style putter-type club head, the XYZ coordinate system having an X-axis, a Y-axis, and a Z-axis, with a horizontal X-axis extending from the heel to the toe, a vertical Y-axis extending from the sole to the top rail, and a horizontal Z-axis extending from the strike face to the rear.

[0210] (Clause 13) A blade-style putter-type club head as described in Clause 12, wherein the CG position is defined by points CGx, CGy, and CGz corresponding to points on the X-axis, Y-axis, and Z-axis, respectively, where CGx is measured from the origin parallel to the X-axis, CGy is measured from the origin parallel to the Y-axis, and CGz is measured from the origin parallel to the Z-axis, where CGx is between 0.00 inches and 0.10 inches, CGy is between 0.30 inches and 0.90 inches, and CGz is between -0.35 inches and -01.10 inches.

[0211] (Clause 14) The moment of inertia MOIyy about the Y axis is 1000g*in 2 A larger, blade-style putter-type club head as described in Clause 12.

[0212] (Article 15) Moment of inertia MOIxx about the X-axis is 100g*in 2 A larger, blade-style putter-type club head as described in Clause 12.

[0213] (Article 16) The moment of inertia MOIzz about the Z axis is 1000g*in 2 A larger, blade-style putter-type club head as described in Clause 12.

[0214] (Article 17) A blade-style putter-type club head as described in Article 10, further comprising an MOIyy / CGz ratio of greater than 1600.

[0215] (Clause 18) A blade-style putter-type club head as described in Clause 10, wherein the perimeter weighting comprises one or more perimeter weights.

[0216] (Clause 19) A blade-style putter-type club head as described in Clause 18, wherein each of the one or more perimeter weights has a mass, the mass being between 5 grams and 75 grams.

[0217] (Article 20) Outer weight is CG w CG wis located at a distance from the Y-axis, the distance being greater than 2.0 inches.

[0218] (Clause 21) A blade-style putter-type club head as described in Clause 10, wherein the perimeter heavier can be any one or combination of perimeter weighting, thickening the mass area on the perimeter of the blade-style putter-type club head, or including a mixture of hybrid materials.

[0219] (Clause 22) A blade-style putter-type club head as described in Clause 18, wherein the plurality of heel weights and the plurality of toe weights may each be any one or combination of rectangular, triangular, pyramidal, spherical, semicircular, square, cylindrical, oval, elliptical, trapezoidal, pentagonal, hexagonal, octagonal, or other desired geometric or non-geometric shapes.

[0220] Because the Rules of Golf may change from time to time (e.g., new Rules may be adopted and old Rules may be repealed or amended by golf standards organizations and / or governing bodies such as the United States Golf Association (USGA), the Royal and Ancient Golf Club of St. Andrews (R&A), etc.), golf equipment to which the apparatus, methods, and articles of manufacture described herein relate may conform or non-conform with the Rules of Golf at any particular time. Accordingly, golf equipment to which the apparatus, methods, and articles of manufacture described herein relate may be advertised, offered for sale, and / or sold as conforming or non-conforming golf equipment. The apparatus, methods, and articles of manufacture described herein are not limited in this respect.

[0221] Replacement of one or more claimed elements constitutes a reconstruction, not a repair. Moreover, benefits, other advantages, and solutions to problems have been described with respect to certain embodiments. However, a benefit, advantage, solution to a problem, and an element that may give rise to or make more pronounced a benefit, advantage, or solution are not to be construed as a critical, essential, or essential feature or element of any or all of the claims unless such benefit, advantage, solution, or element is recited in a claim.

[0222] Moreover, the embodiments and limitations disclosed herein are not dedicated to the public under the doctrine of dedication if the embodiment and / or limitation (1) is not expressly recited in the claims, and (2) is an equivalent or potentially equivalent element and / or limitation recited in the claims under the doctrine of equivalents.

[0223] Although the invention has been described with reference to particular embodiments, it will be understood by those skilled in the art that various modifications can be made without departing from the spirit or scope of the invention. Accordingly, the disclosure of the embodiments of the invention is intended to be illustrative, but not limiting, of the scope of the invention.

Claims

1. A blade-style putter-type club head, a strike face, a rear portion opposite the strike face, a heel, a toe opposite the heel, a top rail, a sole, a hosel, and a perimeter weight; The center of gravity of the club head (CG position), An XYZ coordinate system, the origin of the XYZ coordinate system is defined at a center point of the leading edge of the blade-style putter-type club head; The XYZ coordinate system has an X axis, a Y axis, and a Z axis, a horizontal X-axis extends from said heel to said toe; a vertical Y-axis extends from the sole to the top rail; a horizontal Z-axis extends from said strike face to said rear; The moment of inertia MOIyy about the Y axis is 1000 g*in ２ (6451.6g*cm ２ ), said XYZ coordinate system being larger than a length; the length is measured in a direction parallel to the X-axis from an outermost point of the toe to an outermost point of the heel; said length being greater than 5.00 inches (12.7 centimeters); Blade style putter type club head.

2. the CG position is defined by points CGx, CGy, and CGz corresponding to points on the X-axis, the Y-axis, and the Z-axis, respectively; the CGx is measured from the origin parallel to the X-axis; the CGy is measured parallel to the Y-axis from the origin; the CGz is measured parallel to the Z axis from the origin; said CGx being between 0.00 inches (0.00 centimeters) and 0.10 inches (0.254 centimeters); said CGy being between 0.30 inches (0.762 centimeters) and 0.90 inches (2.286 centimeters); said CGz being between -0.35 inches (0.889 centimeters) and -1.10; 2. The blade-style putter-type club head of claim 1.

3. The blade-style putter-type club head of claim 2 , further comprising a MOIyy / CGz ratio of greater than 1600.

4. The moment of inertia MOIxx about the X-axis is 100 g*in ２ (645.16g*cm ２ 2. The blade-style putter-type club head of claim 1, wherein the club head is greater than 1.

5. The moment of inertia MOIzz about the Z axis is 1000 g*in ２ (6451.6g*cm ２ 2. The blade-style putter-type club head of claim 1, wherein the club head is greater than 1.

6. 2. The blade-style putter-type club head of claim 1, wherein the perimeter weighting comprises one or more perimeter weights.

7. the hosel has a hosel axis; the hosel axis is concentric with the hosel and parallel to the Y-axis; The hosel axis is at a distance D from the heel. ｈ Located at The distance D ｈ is greater than 1.00 inches (2.54 centimeters), 2. The blade-style putter-type club head of claim 1.

8. The blade-style putter-type club head of claim 1 , wherein the perimeter weight is integral with the blade-style putter-type club head.

9. The blade-style putter-type club head of claim 1 , wherein the perimeter weight forms the heel, the toe, the sole, and the strike face or portions thereof.

10. A blade-style putter-type club head, a strike face, a rear portion opposite the strike face, a heel, a toe opposite the heel, a top rail, a sole opposite the top rail, a hosel, and a peripheral weight; The total mass, The center of gravity of the club head (CG position), A GC plane, the GC plane being a central plane extending from the strike face toward the rear; a first set of planes, a second set of planes, a third set of planes, and a fourth set of planes; the first set of planes is at a distance L1 from the GC plane; the second set of planes is at a distance L3 from the GC plane; the third set of planes is at a distance L5 from the GC plane; the fourth set of planes is at a distance L7 from the GC plane; Between 30% and 50% of the total mass may be located outside the third set of planes, between 5% and 25% of the total mass. Blade style putter type club head.

11. the distance L1 is 1.0 inch (2.54 centimeters); the distance L3 is 1.5 inches (3.81 centimeters); the distance L5 is 2.0 inches (5.08 centimeters); The distance L7 is 2.5 inches (6.35 centimeters).

11. The blade-style putter-type club head of claim 10.

12. It further has an XYZ coordinate system, the origin of the XYZ coordinate system is defined at a center point of the leading edge of the blade-style putter-type club head; The XYZ coordinate system has an X axis, a Y axis, and a Z axis, a horizontal X-axis extends from said heel to said toe; a vertical Y-axis extends from the sole to the top rail; A horizontal Z-axis extends from the strike face to the rear.

11. The blade-style putter-type club head of claim 10.

13. the CG position is defined by points CGx, CGy, and CGz corresponding to points on the X-axis, the Y-axis, and the Z-axis, respectively; the CGx is measured from the origin parallel to the X-axis; the CGy is measured parallel to the Y-axis from the origin; the CGz is measured parallel to the Z axis from the origin; said CGx being between 0.00 inches (0.00 centimeters) and 0.10 inches (0.254 centimeters); said CGy being between 0.30 inches (0.762 centimeters) and 0.90 inches (2.286 centimeters); said CGz being between -0.35 inches (0.889 centimeters) and -01.10; 13. The blade-style putter-type club head of claim 12.

14. The moment of inertia MOIyy about the Y axis is 1000 g*in ２ (6451.6g*cm ２ 13. The blade-style putter-type club head of claim 12, wherein the club head is greater than 1.

15. The moment of inertia MOIxx about the X-axis is 100 g*in ２ (645.16g*cm ２ 13. The blade-style putter-type club head of claim 12, wherein the club head is greater than 1.

16. The moment of inertia MOIzz about the Z axis is 1000 g*in ２ (6451.6g*cm ２ 13. The blade-style putter-type club head of claim 12, wherein the club head is greater than 1.

17. The blade-style putter-type club head of claim 10 , further comprising a MOIyy / CGz ratio of greater than 1600.

18. The blade-style putter-type club head of claim 10 , wherein the perimeter weighting comprises one or more perimeter weights.

19. 20. The blade-style putter-type club head of claim 18, wherein each perimeter weight of the one or more perimeter weights has a mass, the mass being between 5 grams and 75 grams.

20. The outer circumference weight is CG ｗ having The CG ｗ is at a distance from the Y-axis, the distance is greater than 2.0 inches (5.08 centimeters); 13. The blade-style putter-type club head of claim 12.

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