# Patent

## Title
Golf club heads

## Abstract

Described are embodiments of golf club heads having an internal cavity and features that cause the golf club head to have an improved acoustic performance when striking a golf ball. Some embodiments include one or more weight tracks and/or weight ports formed in the sole for receiving adjustable weights. The golf club heads can include one or more internal ribs, thickened wall regions, and/or posts positioned within the cavity that increase the rigidity of the club head and improve the acoustic performance of the club head when striking a ball.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This application relates to U.S. Pat. Nos. 6,878,073 and 8,888,607; U.S. Patent Application Publication Nos. 2013/0172103, 2014/0080629, 2015/0011328 and 2015/0024870; U.S. patent application Ser. No. 14/717,864 filed May 20, 2015; and U.S. patent application Ser. No. 14/789,838 filed Jul. 1, 2015; all of which are incorporated by reference herein in their entirety and are considered to be part of the disclosure of this application.
FIELD
This application relates to golf clubs, and more particularly to golf club heads for wood-type golf clubs having improved acoustic properties.
BACKGROUND
A golf club set includes various types of clubs for use in different conditions or circumstances in which a ball is hit during a golf game. A set of clubs typically includes a driver for hitting the ball the longest distance on a course. Fairway woods, rescue clubs, and hybrid clubs can be used for hitting the ball shorter distances than the driver. A set of irons are used for hitting the ball within a range of distances typically shorter than the driver or woods. The acoustical properties of golf club heads, e.g., the sound a golf club head generates upon impact with a golf ball, affect the overall feel of a golf club by providing instant auditory feedback to the user of the club. For example, the auditory feedback can affect the feel of the club by providing an indication as to how well the golf ball was struck by the club, thereby promoting user confidence in the club and himself. The sound generated by a golf club head can be based in part on the rate, or frequency, at which the golf club head vibrates upon impact with the golf ball. Generally, for wood-type golf clubs (as distinguished from iron-type golf clubs), particularly those made of steel or titanium alloys, a desired frequency is generally around 3,000 Hz and preferably greater than 3,200 Hz. A frequency less than 2,800 Hz or 3,000 Hz may result in negative auditory feedback and thus a golf club with an undesirable feel.
Accordingly, it would be desirable to increase the vibration frequencies of golf club heads having relatively large volumes, relatively thin walls, and other frequency reducing features in order to provide a golf club head that provides desirable feel through positive auditory feedback but without sacrificing the head's ball-striking performance.
SUMMARY
Described herein are embodiments of wood-type golf club heads having a hollow body defining an interior cavity and comprising a sole, a crown, a skirt, a hosel, and a striking face. The golf club heads can include a front portion, rear portion, heel portion and toe portion. Examples of such golf club heads include wood-type golf club heads, such as drivers, fairway woods, rescue clubs, hybrid clubs, and the like.
Disclosed wood-type club heads can include one or more moveable weights coupled to the sole and corresponding recessed/concave ports that receive a weight and/or recessed/concave tracks about which one or more weights can be moved to adjust the mass properties of the club head. Some embodiments include a weight track that extends across the front of the sole in a heel-toe direction and some embodiments include a weight track that extends across the sole in a front-rear direction. Some embodiments include other concave regions on the sole and/or the crown. Such concavities, recesses, and other irregular structures in a wood-type golf club head can lead to detrimental effects on the acoustic properties of the club, such as reduced vibration frequencies. To counteract such detrimental effects on the acoustic properties, disclosed club heads can include various combinations of stiffening structures, such as internal ribs, posts, tubes, thickened wall regions, and other stiffening structures positioned within the interior cavity of the head.
The foregoing and other objects, features, and advantages of the disclosed technology will become more apparent from the following detailed description, which proceeds with reference to the accompanying figures.



BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1-5 show various views of an exemplary wood-type golf club head having two recessed weight tracks in the sole.
FIG. 6 is an exploded perspective view of the club head of FIG. 1.
FIG. 7 is a heel-side view of the club head of FIG. 1 with the crown removed.
FIG. 8 is generally horizontal cross-sectional top-down view of a lower portion of the club head of FIG. 1, showing the interior side of the sole.
FIG. 9 is a generally vertical cross-sectional side view of a toe-side portion of the club head of FIG. 1.
FIG. 10 is an enlarged view of a portion of FIG. 9.
FIGS. 11-16 show various views of an exemplary wood-type golf club head having a recessed weight track in the front of the sole, a weight port in the rear of the sole, and concave regions in the rear of the crown.
FIG. 17 is cross-sectional top view of a lower portion of the club head of FIG. 11, showing the interior side of the sole.
FIG. 18 is a cross-sectional side view of a toe portion of the club head of FIG. 11, illustrating various ribs and a vertical member extending between the sole and the crown through the interior cavity.
FIG. 19 is a schematic cross-sectional side view of an exemplary wood-type golf club head that includes a member extending between the crown and the sole in tension.
FIG. 20 is a schematic cross-sectional side view of an exemplary wood-type golf club head that includes a member extending between the crown and the sole in compression.
FIGS. 21-23 show front, top, and side views, respectively, of an exemplary golf club head to illustrate an exemplary coordinate system.



DETAILED DESCRIPTION
The following disclosure describes embodiments of golf club heads for wood-type clubs (e.g., drivers, fairway woods, rescue clubs, hybrid clubs, etc.) that incorporate structures providing improved weight distribution, improved sound characteristics, improved adjustability features, and/or combinations of the foregoing characteristics. The disclosed embodiments should not be construed as limiting in any way. Instead, the present disclosure is directed toward all novel and nonobvious features and aspects of the various disclosed embodiments, alone and in various combinations and subcombinations with one another. Furthermore, any features or aspects of the disclosed embodiments can be used in any combination and subcombination with one another. The disclosed embodiments are not limited to any specific aspect or feature or combination thereof, nor do the disclosed embodiments require that any one or more specific advantages be present or problems be solved.
Throughout the following detailed description, a variety of examples of club heads for wood-type golf clubs are provided. Related features in the examples may be identical, similar, or dissimilar in different examples. For the sake of brevity, related features will not be redundantly explained in each example. Instead, the use of related feature names will cue the reader that the feature with a related feature name may be similar to the related feature in an example explained previously. Features specific to a given example will be described in that particular example. The reader should understand that a given feature need not be the same or similar to the specific portrayal of a related feature in any given figure or example.
Throughout the following detailed description, references will be made to channels, tracks, concavities, and recesses. Sometimes these words may be used interchangeably to describe a feature that may hold a slidably repositionable weight, such as, for example a forward channel or track in the sole. At other times, these words may refer to a feature in the club head designed to provide other characteristics, and may not necessarily hold a weight. For example, some embodiments include concavities in the crown and sole that does not receive an adjustable weight. Still at other times a channel or track may be shown without an attached weight assembly, however this does not indicate that a weight assembly cannot be installed in the channel or track.
The present disclosure makes reference to the accompanying drawings which form a part hereof, wherein like numerals designate like parts throughout. The drawings illustrate specific embodiments, but other embodiments may be formed and structural changes may be made without departing from the intended scope of this disclosure. Directions and references may be used to facilitate discussion of the drawings but are not intended to be limiting. For example, certain terms may be used such as “up,” “down,” “upper,” “lower,” “horizontal,” “vertical,” “left,” “right,” and the like. These terms are used, where applicable, to provide some clarity of description when dealing with relative relationships, particularly with respect to the illustrated embodiments. Such terms are not, however, intended to imply absolute relationships, positions, and/or orientations. Accordingly, the following detailed description shall not to be construed in a limiting sense.
As used herein, the terms “a”, “an”, and “at least one” encompass one or more of the specified element. That is, if two of a particular element are present, one of these elements is also present and thus “an” element is present. The terms “a plurality of” and “plural” mean two or more of the specified element. As used herein, the term “and/or” used between the last two of a list of elements means any one or more of the listed elements. For example, the phrase “A, B, and/or C” means “A”, “B,”, “C”, “A and B”, “A and C”, “B and C”, or “A, B, and C.” As used herein, the term “coupled” generally means physically (e.g., mechanically, chemically, magnetically, etc.) coupled or linked and does not exclude the presence of intermediate elements between the coupled items absent specific contrary language.
To complement the disclosure described herein, additional information related to wood-type golf clubs can be found in one or more of the references that are incorporated by reference above. Much of this incorporated information is not repeated herein for purposes of brevity, but is still considered part of this disclosure.
Thin walled golf club heads, particularly wood-type golf club heads, can produce an undesirably low frequency sound (e.g., less than about 3,000 Hz) when striking a golf ball. This can be especially true for club heads that include weight tracks, weight ports, recesses, concavities, and/or other irregular features in the club head body. In order to stiffen the club head structure, and to thereby increase the frequency of the sound vibrations produced by the golf club head, one or more stiffening structures (e.g., ribs, posts, tubes, mass pads, thickened walls, etc.) may be included. Some such structures can be formed in or attached to (e.g., via welding) the interior cavity of the body of the club head.
Described below are several embodiments of golf club heads having one or more stiffening structures that increase the vibration frequency of the club head. In particular embodiments, a golf club head has an unsupported area, e.g., a weight track, weight port, depression, or concave portion, on an external portion of the club head. In specific implementations, the one or more stiffening structures connect with and/or extend at least partially along or within the unsupported area to improve properties, such as acoustical characteristics, of the golf club head upon impacting a golf ball.
FIGS. 1-10 show an exemplary wood-type golf club head 2 that includes a hosel 4, a ball-striking face, or strike face, 6, a crown 8, and a sole 10. The strike face 6 can be integrally formed with the body or attached to the body. The club head has toe side 12, a heel side 14, a front side 16, and a rear side 18.
The crown, sole, and skirt therebetween can have any of various shapes and contours. In the specific embodiment shown in FIGS. 1-10, the crown and skirt have generally rounded, convex profiles, while the sole is generally convex in shape, but includes a plurality of steps, recesses, and weight tracks that create localized concave portions in the exterior of sole (FIGS. 2-5), and corresponding convex surfaces in the interior of the sole (FIGS. 8 and 9).
As shown in FIG. 2, the sole 10 includes a front weight track 30 that extends in a heel-toe direction adjacent the front 16 of the club head, and a rear weight track 36 that extends in a front-rear direction from adjacent the front weight track 30 to adjacent the rear 18 of the club head. One or more adjustable weight assemblies can be mounted in each weight track and can be adjusted along the length of the respective track to adjust the mass distribution properties of the club head. As shown, two weight assemblies 32, 34 are mounted in the front weight track 30 and one weight assembly 38 is mounted in the rear weight track 36. As shown in FIGS. 8 and 9, the weight tracks 30 and 36 create convex surfaces on the interior of the sole.
As discussed in U.S. patent application Ser. No. 14/789,838, the minimum distance between a vertical plane passing through the center of the face plate and the weight track 30 at the same x-coordinate as the center of the face plate is between about 10 mm and about 50 mm, such as between about 20 mm and about 40 mm, such as between about 25 mm and about 30 mm. In the embodiments shown, the width of the weight track (i.e., the horizontal distance between the front channel wall and rear channel wall adjacent to the locations of front ledge and rear ledge) may be between about 8 mm and about 20 mm, such as between about 10 mm and about 18 mm, such as between about 12 mm and about 16 mm. In the embodiments shown, the depth of the channel (i.e., the vertical distance between the bottom channel wall and an imaginary plane containing the regions of the sole adjacent the front and rear edges of the channel) may be between about 6 mm and about 20 mm, such as between about 8 mm and about 18 mm, such as between about 10 mm and about 16 mm. In the embodiments shown, the length of the weight track 30 (i.e., the horizontal distance between the heel end of the channel and the toe end of the channel) may be between about 30 mm and about 120 mm, such as between about 50 mm and about 100 mm, such as between about 60 mm and about 90 mm. The rear weight track 36 can have similar dimensions, but oriented in a front-rear direction rearward of the front weight track 30.
As also discussed in U.S. patent application Ser. No. 14/789,838, placing a mass member or weight assembly such as weight assemblies 32, 34, 38 into the weight tracks 30, 36 may require first angling the mass member relative to the channel and then inserting the mass member a sufficient distance underneath the rear ledge such that the mass member may rotate into position within the channel (see FIGS. 37A-37C of U.S. patent application Ser. No. 14/789,838). If the mass member is not inserted a sufficient distance it may not be able to rotate into position within the channel due to a possible interference with the front ledge of the channel. Once the mass member is rotated into position, then a washer may be attached to the mass member using a fastening bolt. The mass member may transition slightly towards the front ledge when slid along the channel.
Similarly, an entire weight assembly may be installed using the same method as just described. First, the fastening bolt is adjusted to be holding the assembly loosely together, then the entire assembly is positioned at an angle relative to the channel for insertion, then inserted into the channel such that the mass member and the washer sandwich a portion of the rear ledge, then the assembly may be rotated into position, adjusted so that the weight assembly is sandwiching both the front and rear ledges between the mass member and the washer, then the weight assembly may be slid to the desire position along the channel, and finally the fastening bolt may be tightened so as to securely engage the channel.
In some embodiments, the weight track or installation cavity can include a recessed or indented surface to facilitate installation of the mass member within the channel. For example, the recessed surface may be located between the rear ledge and the bottom channel wall. Additionally or alternatively, the installation cavity and recessed surface may be located at a toe end of the channel. Additionally or alternatively, the recessed surface may extend an entire length of the channel allowing for installation along the entire length of the channel. Additionally or alternatively, the recessed surface may be located between the front ledge and the bottom channel wall.
The recess, whether it extends the entire length of the channel or just a portion of the channel, should be sized appropriately to accept the mass member or weight assembly. Typically this can be accomplished by making the channel dimensions slightly larger than the mass member so that mass member can slide with little resistance within the channel.
As shown in FIGS. 6, 7, and 10, the crown can comprise a plate 22 that is coupled to recessed ledge 26. As shown the plate 22 may have some curvature. For example, the plate 22 may curve from the toe side 12 to the heel side 14, and the plate 22 may curve from the front side 16 to the rear side 18. The plate 22 may be attached to recessed ledge 26 by adhesive bonding or welding. The plate 22 can comprise a different material than the rest of the body. For example, the plate 22 can comprise a lower density material, such as a composite material (e.g., a fiber reinforced polymer composite).
In some embodiments, the mating surfaces of the plate 22 and recessed ledge 26 may be prepared by sandblasting to enhance bonding. In some embodiments, the plate 22 may be coupled to the recessed ledge 26 via a gasket-like joining member 24. The gasket-like joining member 24 may provide additional benefits, such as sound dampening and aiding with fit and finish such that the plate 22 joins smoothly with the club head body.
Some embodiments can comprise a cast titanium or titanium alloy crown that is integral with the body and/or not formed independently and then later attached to the body.
In any disclosed embodiments, the club head body is thin-walled. For example, the crown and skirt each may have an average thickness of from about 0.5 mm to about 1.2 mm, such as from about 0.65 mm to about 0.9 mm, or about 0.7 mm to about 0.8 mm. The sole may have an average thickness of from about 0.5 mm to about 2.0 mm, such as from about 1.0 mm to about 1.6 mm, or about 1.0 mm to about 1.4 mm.
The embodiment disclosed herein can also include an adjustable shaft attachment system for coupling a shaft to the hosel, the system including various components, such as a sleeve, a washer, a hosel insert, and a screw (more detail regarding the hosel and the adjustable shaft connection system can be found, for example, in U.S. Pat. No. 7,887,431 and U.S. patent application Ser. Nos. 14/789,838, 13/077,825, 12/986,030, 12,687,003, 12/474,973, which are incorporated herein by reference in their entirety). The shaft connection system, in conjunction with the hosel, can be used to adjust the orientation of the club head with respect to the shaft, as described herein and in the patents and applications incorporated by reference.
The golf club head 2 includes one or more stiffening structures. As used herein, a stiffening structure is defined generally as a structure having any of various shapes and sizes projecting or extending inwardly from any portion of the interior of the golf club head to provide structural support to, improved performance of, and/or acoustical enhancement of, the golf club head, and include at least ribs, posts, tubes, thickened wall portions, and mass pads. Stiffening structures can be co-formed with, coupled to, secured to, or attached to, the golf club head.
As shown in FIGS. 6-9, the club head 2 can comprise a plurality of internal ribs and/or mass pads that stiffen the club head. The club head 2 can comprise any one or more of the illustrated ribs, and/or additional ribs not shown. With reference to FIG. 8, the club head 2 can include a rib 50 that couples a heel portion of the front weight track 30 and/or the hosel 4 with a front portion of the rear weight track 36, a rib 52 that couples a toe portion of the track 30 with the front portion of the rear track 36, a rib 54 that couples a toe portion of the track 30 with a toe portion of the sole 10, a rib 56 that extends from the rib 54 toward and forward, a plurality of ribs 58 that extend from a front side of the track 30 to the front 16 of the club head, a rib 60 that extends from a toe side of the rear track 36 in a rearward and toeward direction across the sole, a rib 62 that extends toeward from the toe side of the rear track, a rib 64 that extends heelward from the heel side of the rear track (e.g., ribs 62 and 64 can be aligned and/or perpendicular to the front-rear axis of the rear track, and/or can form a single rib that extends across the rear track), a rib 66 that extends inwardly across the sole from a mass pad 68 on the toe side of the club head body, a rib 70 that extends in a heel-toe direction across the rear track 36 near the rear end of the rear track and couples to a mass pad 72 on the heel side of the club head body, ribs 74 and 76 that extend rearwardly from the rear end of the rear track 36 to a mass pad 40 formed in the rear of the club head body, and/or ribs 78 and 80 that extend rearwardly from the rib 70 to the mass pad 40 on the toe side of the rear track 36.
The ribs can have a generally vertical orientation, through some ribs, such as the rib 70, can be tilted from vertical. The ribs 70, 74, 76, 78, and 80 as well as mass pads 40 and 68 are further illustrated in FIG. 6, the rib 66 and mass pad 68 are illustrated in FIG. 7, and the ribs 54, 56, 58, 62, 66, 70, and 76 as well as mass pads 40 and 68 are further illustrated in FIG. 9.
The ribs help couple the various weight tracks and other irregular features on the sole and skirt regions together to provide a greater overall stiffness and higher vibration frequency. Additionally, the heel end of the front weight track 30 can be structurally integrated with, or coupled via stiffening structures to, the lower end of the hosel 4. Similarly, the front end of the rear mass track 36 can be integrated with, or coupled via stiffening structures to, the rear side of the front weight track 30, as shown at 82. The ribs 74 and 76 can extend across a rear portion 84 of the sole from the weight track 36 to the mass pad 40 at the rear end of the sole to further support the weight track.
The mass pads 40, 68 and/or 72 can comprise thickened wall portions and/or can comprise added material that is attached (e.g., welded) to the inner surfaces of the body walls to provide increased rigidity and structural support. The mass pads can have varying thickness that increases from a regular wall thickness at the perimeter of the mass pad to a maximum thickness near where the ribs join the mass pad. The regular wall thickness of the body at the perimeter of the mass pad can be 1.0 mm or less. In some embodiments, any of the mass pads can have a maximum thickness of at least 0.8 mm to 5.5 mm where a rib joins the mass pad. In some embodiments, the mass pad 40 can provide at least 0.2 grams to 4.0 grams of added mass (for titanium) or at least 0.3 grams to 7.0 grams of added mass, and/or at least 40-900 mm3 of added material compared to a hypothetical embodiment where the mass pad is replaced with a regular wall section having a regular body wall thickness.
Each rib in a club head can have an associated mass and an associated benefit in terms of frequency (Hz) improvement. Accordingly, fewer ribs may be used to reduce the overall club weight, however the first mode frequency may be impacted, and in most cases will decrease. A sample rib pattern is shown in FIG. 8, which is similar to that shown in FIGS. 55C and 55D of U.S. application Ser. No. 14/789,838. Table 1 below shows the impact of selectively removing a single rib at a time from FIG. 55D of U.S. application Ser. No. 14/789,838. For example, removing rib 13 causes a 404 Hz detriment to the first mode frequency from 3411 Hz to 3006 Hz, whereas removing rib 5 improved the first mode frequency by 34 Hz. There is an array of satisfactory designs, one that was chosen was to remove ribs 5, 11, and 17 to achieve a first mode frequency of 3421 Hz. Similar effects on the first mode frequency of the club 2 would occur by removing/adding one or more of the ribs shown in FIG. 8. Such effects on the first mode frequency also apply to the ribs of the club head 100 shown in FIGS. 17 and 18.














TABLE 1








1st

Hz
Mass of




Rib
Mode
Mass
Penalty
Rib
Hz/g























0
3411
206.6


—



1
3410
206.3
1
0.3
3.3



2
3336
206
74
0.3
246.7



3
3375
205.9
36
0.4
90.0



4
3434
206.5
−23
0.1
−230.0



5
3444
206.4
−34
0.2
−170.0



6
3336
206
74
0.3
246.7



7
3370
206.1
40
0.2
200.0



8
3378
205.8
32
0.5
64.0



9
3305
205.7
105
0.6
175.0



10 
3352
205.2
58
1.1
52.7



11 
3388
205.7
22
0.6
36.7



12 
3374
205.6
36
0.7
51.4



13 
3006
205.2
404
1.1
367.3



14 
3381
205.8
29
0.5
58.0



15 
3248
205.7
162
0.6
270.0



16 
3377
206.1
33
0.2
165.0



17 
3404
206
6
0.3
20.0



Total


1055
8
131.9










FIGS. 11-18 show an exemplary wood-type golf club head 100 that includes a hosel 104, a ball-striking face, or strike face, 106, a crown 108, and a sole 110. The strike face 106 can be integrally formed with the body or attached to the body. The club head has toe side 112, a heel side 114, a front side 116, and a rear side 118.
The crown, sole, and skirt therebetween can have any of various shapes and contours. In the specific embodiment shown in FIGS. 11-18, the crown, sole, and skirt have generally convex outer surfaces, but include a plurality of concavities, recesses, and weight tracks that create localized concave portions in the exterior of crown and sole, and corresponding convex surfaces in the interior of the crown and sole. As shown in FIGS. 11-12, the crown 108 includes a convex front portion 120 and concave regions 122, 124, 126 in the rear of the crown.
As shown in FIG. 13, the sole 110 includes a front channel 130 that extends in a heel-toe direction adjacent the front 116 of the club head, and concave regions 132, 134, 136, 138 in the rear of the sole. A weight port 128 is also included in the rear of the sole. In some embodiments, one or more adjustable weight assemblies can be mounted in the channel 130 and/or one or more adjustable weight assemblies can be mounted in the weight port 128. In such embodiments, the weight assemblies can be adjusted in position relative to the club head body to adjust the mass distribution properties of the club head.
In some embodiments, a stationary weight can be positioned in or adjacent to the front channel 130. For example, a weight can be mounted in the channel 130 without the ability to slide along the channel. In some embodiments, a weight or extra mass can be positioned in or behind the rear wall of the front channel 130. For example, a weight can be mounted in a recess in the sole located just behind the front channel and/or extending rearwardly from the front channel. Such a weight can be secured to the sole with a screw or other fastener and can be removable and replaceable with weight having different masses.
In embodiments having a weight mounted in the front channel, the front channel can be specifically shaped for receiving and retaining the weight and/or to allow the weight to slide along the channel and be secured in different side-to-side positions along the channel. In some embodiments, a weight can be secured in the front channel with a gap formed between the front of the weight and the front wall of the channel. For example, FIG. 18 of U.S. Pat. No. 8,888,607 (which is incorporated herein by reference in its entirety) shows a weight 250 mounted in a front channel 260 in the sole 14 with a gap 258 formed between the front portion of the weight 250 and the front wall of the channel 260. Such a gap can provide various benefits, such as allowing the lower part of the face and/or front part of the sole to deflect rearwardly to a greater extent when striking a golf ball, which can lead to a high COR.
As shown in FIGS. 17 and 18, the crown concavities 122, 124, 126, the sole concavities 132, 134, 136, 138, and the channel 130 create convex surfaces on the interiors of the sole and crown.
The golf club head 100 includes one or more stiffening structures. The club head 100 can comprise a plurality of internal ribs and/or mass pads, as well as a post that couples the sole to the crown across the interior cavity. In some embodiments, the club head can comprise a post positioned within the interior cavity of the body at a location spaced between the front channel 130 and the rear end of the body and spaced between the toe and heel sides of the body. The post can comprise an elongated member having a lower end coupled to the sole, an upper end coupled to the crown, and an intermediate portion between the lower end and the upper end that is suspended within the interior cavity apart from the body. An exemplary post 150 is shown in FIGS. 17 and 18. A bottom end 150A of post 150 can be coupled to the sole, such as at the concavity 132, which projects upwardly into the interior cavity of the club head. An upper end 150B of the post 150 can be coupled to the crown, such as at the concavity 124, which projects downwardly into the interior cavity of the club head. The post 150 can comprise a solid rod, a partially or wholly hollow tube, an I-beam, X-beam, T-beam, or various other cross-sectional profiles. An intermediate portion of the post 150 between the ends 150A, 150B is suspended apart from the body walls within the cavity. The post 150 can be under tension (i.e., urging the crown and sole toward each other), under compression (i.e., urging the crown and sole apart from each other), or neither.
The club head 100 can also comprise any one or more of the illustrated ribs, and/or additional ribs not shown. With reference to FIG. 17, the club head 100 can include a rib or group of ribs that form an annular rib structure 152 that extends across the sole, the toe side of the body, the crown, and the heel side of the body, forming a ring around the inner surfaces of the sole, crown, and skirt. The rib structure 152 can form a complete or partial ring. The rib structure 152 can be substantially within a plane that extends in the sole-crown directions and the heel-toe directions, and is between the front and rear of the club head. The rib structure 152 can intersect with the top and/or bottom ends of the post 150, as shown in FIG. 18. The rib structure 152 can include a portion 152A that extends across the sole heelward of the bottom end of the post 150A, a portion 152B that extends across the sole toeward of the bottom end of the post 150A, a portion 152C that extends across the crown toeward of the top end of the post 150B, and a portion 152D that extends across the crown heelward of the top end of the post 150B. The rib 152C can extend across a portion of the concavity 124 and the rib 152D can extend across the concavities 122, 126, and a portion of the concavity 124. The rib structure 152 may or may not be continuous all the way around the internal surfaces of the body, and can include breaks or discontinuities.
The club head 100 can also comprise a rib 154 that extends from the bottom end of the post 150A forward across the sole, over a toe end portion of the front channel 130, and down to a point 155 adjacent the strike face 106. The club head 100 can also comprise a rib 156 that extends from the rib 152A rearward and toeward across the sole to the rear weight port 128, and a rib 158 that extends from the rib 152A rearward and heelward across the sole to the rear weight port 128. The club head 100 can also comprise ribs 160 and 161 that extend forwardly across the sole, over a mid-portion of the channel 130, and down to points 162 adjacent the front end of the sole. The ribs can have a generally vertical orientation, through some ribs can be tilted from vertical.
The ribs help couple the front channel 130, the rear weight port 128, and the various concavities in the crown and sole together to provide a greater overall stiffness and higher vibration frequency. Additionally, the heel end of the front channel 130 can be structurally integrated with, or coupled via stiffening structures to, the lower end of the hosel 4. In more specific implementations, post 150 can comprise a tubular, thin-walled structure which may be hollow or may be partially solid. The post 150 may be formed of a metallic alloy (e.g., titanium alloy, aluminum alloy, steel alloy), a polymer-fiber composite material, or other material providing an appropriate combination of stiffness and light-weight. The post 150 can have an outer diameter of from about 2 mm to about 7 mm, such as from about 3 mm to about 6 mm, or about 4 mm to about 5 mm. The post 150, when tubular, can have a wall thickness of from about 0.25 mm to about 2.5 mm, such as from about 0.3 mm to about 1.5 mm, or from about 0.4 mm to about 1.0 mm, or about 0.5 mm.
The post 150 can be lightweight and compact. By way of example, in specific implementations, the mass of the post 150 can be approximately 8 grams or less, such as 6 grams or less. Of course, in other implementations, the particular dimensions of the post 150 and the ribs may vary, and optimal dimensions and combined mass may be different for different head designs.
FIG. 19 shows an exemplary wood-type golf club head 200 having a strike plate 206, a crown 208, a sole 210, a front end 216, a rear end 218, and a stiffening member 250 held in tension between the crown and the sole. The stiffening member 250 can be secured by fasteners 252, 254 at either end that engage with the crown and sole to provide the desired tension in the stiffening member. The stiffening member 250 can comprise a bolt with threaded ends that engage with internally threaded structures at the crown and sole, such that rotating the bolt and/or the internally threaded structures increases or decreases the tension in the bolt. In other embodiments, the stiffening member 250 can be fixed to the crown or the sole and only of the fasteners 250, 252 can be rotated to adjust the tension in the member 250. In other embodiments, the stiffening member 250 is fixed relative to the crown and sole (e.g., co-molded or welded) and the tension imparted in the stiffening member during manufacturing is not adjustable. In other embodiments, the stiffening member 250 can comprise a flexible member or cord or filament having sufficient tensile strength. Tension from the tensioning member 250 urges the crown and sole toward each other to reduce the vibrational motion allowed in the crown and sole and therefore increase the vibration frequencies of the crown and sole, and thereby the entire club head 200.
FIG. 20 shows an exemplary wood-type golf club head 300 having a strike plate 306, a crown 308, a sole 310, a front end 316, a rear end 318, and a stiffening member 350 held in compression between the crown and the sole. In some embodiments, the stiffening member 350 can be secured to the sole and/or the crown with fasteners, such as the illustrated internally threaded fastener 352. In some embodiments, as illustrated, one end of the member 350 can simply abut the crown or sole while the other end can be threadedly engaged with the fastener 352 such that rotating the fastener and/or the stiffening member adjusts the amount of compression in the stiffening member. In other embodiments, the stiffening member 350 is fixed relative to the crown and sole (e.g., co-molded or welded) and the compression imparted in the stiffening member during manufacturing is not adjustable. Compression in the tensioning member 350 urges the crown and sole away from each other to reduce the vibrational motion allowed in the crown and sole and therefore increase the vibration frequencies of the crown and sole, and thereby the entire club head 300.
Embodiments of the disclosed golf club heads can have a variety of different volumes. In several embodiments, a golf club head of the present application can be configured to have a head volume between about 100 cm3 and about 600 cm3. For example, certain embodiments of the disclosed golf club heads are for drivers and can have a club head volume from 250 cm3 to 500 cm3 and a club head mass of from 180 grams to 220 grams and/or from 190 grams to 200 grams. In some embodiments, the head volume is between about 300 cm3 and about 500 cm3, between 300 cm3 and about 360 cm3, between about 360 cm3 and about 420 cm3 or between about 420 cm3 and about 500 cm3. Other embodiments of the disclosed golf club heads have a volume less than 250 cm3 and/or have a mass of less than 180 grams. For example, fairways and hybrid-type embodiments of the disclosed club heads can have a volume between 100 cm3 and 300 cm3 and/or a total mass between 80 grams and 222 grams.
Preferably, the golf club heads disclosed herein have an overall vibration frequency, i.e., the average of the first mode frequency of the crown, sole and skirt portions of the golf club head, including stiffening structures, generated upon impact with a golf ball that is greater than 2,800 Hz, greater than 3,000 Hz, greater than 3,200 Hz, greater than3,400 Hz, greater than 3,600 Hz, greater than 3,800 Hz, and/or greater than 4,000 Hz. Frequencies in these ranges can provide a user of the golf club with an enhanced feel and satisfactory auditory feedback. However, a golf club head having a larger volume, relatively thin walls, and various combinations of weight tracks, weight ports, concavities, and/or other irregular features, can reduce the first mode vibration frequencies to undesirable levels. The addition of the stiffening structures described herein can significantly increase the first mode vibration frequencies, thus allowing the first mode frequencies to approach a more desirable level and improving the feel of the golf club to a user.
Golf Club Head Coordinates, Origin, and Center of Gravity
Referring to FIGS. 21-23, a club head origin coordinate system can be defined such that the location of various features of the club head (including a club head center-of-gravity (CG) 10150) can be determined. A club head origin 10160 is illustrated on the club head positioned at the center 10123 of the striking surface 10122.
The head origin coordinate system defined with respect to the head origin 10160 includes three axes: a z-axis 10165 extending through the head origin 10160 in a generally vertical direction relative to the ground 10117 when the club head 10100 is at the normal address position; an x-axis 10170 extending through the head origin 10160 in a toe-to-heel direction generally parallel to the striking surface 10122 (e.g., generally tangential to the striking surface 10122 at the center 10123) and generally perpendicular to the z-axis 10165; and a y-axis 10175 extending through the head origin 10160 in a front-to-back direction and generally perpendicular to the x-axis 10170 and to the z-axis 10165. The x-axis 10170 and the y-axis 10175 both extend in generally horizontal directions relative to the ground 10117 when the club head 10100 is at the normal address position. The x-axis 10170 extends in a positive direction from the origin 10160 towards the heel 10126 of the club head 10100. The y-axis 10175 extends in a positive direction from the head origin 10160 towards the rear portion 10132 of the club head 10100. The z-axis 10165 extends in a positive direction from the origin 10160 towards the crown.
Any golf club head features disclosed and/or claimed herein are defined with reference to the coordinate system shown in FIGS. 21-23 and described above, unless specifically stated otherwise.
Generally, the center of gravity (CG) of a golf club head is the average location of the weight of the golf club head or the point at which the entire weight of the golf club head may be considered as concentrated so that if supported at this point the head would remain in equilibrium in any position.
Referring to FIGS. 21-23, the club head CG 10150 is shown as a point inside the body 10110 of the club head 10100. The location of the club head CG 10150 can also be defined with reference to the club head origin coordinate system illustrated in FIGS. 21-23. For example, and using millimeters as the unit of measure, a CG 10150 that is located 3.2 mm from the head origin 10160 toward the toe of the club head along the x-axis, 36.7 mm from the head origin 10160 toward the rear of the club head along the y-axis, and 4.1 mm from the head origin 10160 toward the sole of the club head along the z-axis can be defined as having a CGx of −3.2 mm, a CGy of 36.7 mm, and a CGz of −4.1 mm.
EXAMPLES
The embodiments illustrated in the Figures are only exemplary and not limiting of the variety of club heads that can embodiment the technologies disclosed herein. For example, in any of the embodiments disclosed herein, the club head can include one or more traditional weight ports and corresponding removable weights, in addition to or instead of one or more weight tracks that allow a weight to slide along the track and/or one or more channels in the sole that do not mount a weight. The following are several examples of club head embodiments that can include one or more of the features disclosed herein. In any of the disclosed embodiment, a weight track may be considered to be a channel when no weight is present and/or a described weight track can be substituted with a channel in the sole that does not mount a weight in an analogous embodiment. Further details regarding these and other embodiments can be found in U.S. Patent Application Publication No. 2015/0024870 and other references referred to herein, all of which are incorporated by reference herein in their entireties.
1. Example A
According to one embodiment, a golf club head has two weight tracks and at least one weight in each weight track. The weights have a mass between about 1 gram and about 50 grams. The golf club head has a volume between about 140 cm3 and about 600 cm3, and a CG with a head origin y-axis coordinate greater than or equal to about 15 mm. In a specific embodiment, at least one of the weights has a head origin y-axis coordinate between about 0 mm and about 20 mm, between about 20 mm and about 50 mm, or greater than 50 mm. In a specific embodiment, the golf club head has a CG with a head origin x-axis coordinate between about −10 mm and about 10 mm and a y-axis coordinate less than or equal to about 50 mm. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 140 kg·mm2 and about 400 kg·mm2, and a moment of inertia about the head CG z-axis between about 250 kg·mm2 and about 600 kg·mm2.
2. Example B
According to another embodiment, a golf club head has first and second weight tracks and at least one weight port, and corresponding weights disposed in the weight tracks and weight ports. In any of these examples, weights in a weight track can be adjustable and movable along the track. The golf club head has a volume between about 140 cm3 and about 600 cm3, and a CG with a head origin y-axis coordinate greater than or equal to about 15 mm. In a specific embodiment, the first and second weights each have a head origin y-axis coordinate between about 0 mm and about 130 mm. In a specific embodiment, the golf club head has a CG with a head origin x-axis coordinate between about −10 mm and about 10 mm and a y-axis coordinate between about 15 mm to about 25 mm, or between about 25 mm to about 35 mm, or between about 35 mm to about 50 mm. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 140 kg·mm2 and about 400 kg·mm2, a moment of inertia about the head CG z-axis between about 250 kg·mm2 and about 600 kg·mm2, and a head volume greater than or equal to 250 cm3.
3. Example C
According to another embodiment, a golf club head has one weight track and at least one weight for the weight track, and at least one weight port with a corresponding weight in the weight port. At least one weight has a head origin x-axis coordinate between about −40 mm and about −20 mm or between about 20 mm and about 40 mm, and a mass between about 5 grams and about 50 grams. The golf club head has a volume between about 140 cm3 and about 600 cm3, and a CG with a head origin y-axis coordinate greater than or equal to about 15 mm. In a specific embodiment, at least one weight has a head origin y-axis coordinate between about 0 mm and about 20 mm, between about 20 mm and about 50 mm, or greater than 50 mm. In a specific embodiment, the golf club head has a CG with a head origin x-axis coordinate between about −10 mm and about 10 mm and a y-axis coordinate less than or equal to about 50 mm. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 140 kg·mm2 and about 400 kg·mm2, and a moment of inertia about the head CG z-axis between about 250 kg·mm2 and about 600 kg·mm2.
4. Example D
According to another embodiment, a golf club head has one weight track and at least one weight per weight track, and at least two weight ports with corresponding weights in the weight ports. At least one of the weights can have a head origin x-axis coordinate between about −60 mm and about −40 mm or between about 40 mm and about 60 mm, and a mass between about 5 grams and about 50 grams. The golf club head has a volume between about 140 cm3 and about 600 cm3, and a CG with a head origin y-axis coordinate greater than or equal to about 15 mm. In a specific embodiment, at least one weight has a y-axis coordinate between about 0 mm and about 20 mm, between about 20 mm and about 50 mm, or greater than 50 mm. In a specific embodiment, the golf club head has a CG with a head origin x-axis coordinate between about −10 mm and about 10 mm and a y-axis coordinate less than or equal to about 50 mm. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 140 kg·mm2 and about 400 kg·mm2, and a moment of inertia about the head CG z-axis between about 250 kg·mm2 and about 600 kg·mm2.
5. Example E
According to another embodiment, a golf club head has first and second weight tracks and at least corresponding first and second weights disposed in the weight tracks. The golf club head has a CG with a head origin x-axis coordinate between about −3 mm and about 2 mm and a head origin y-axis coordinate between about 30 mm and about 40 mm. In a specific embodiment, the golf club head has a volume between about 140 cm3 and about 500 cm3, and the sum of the body mass and the total weight mass is between about 100 grams and about 240 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 220 kg·mm2 and about 360 kg·mm2 and a moment of inertia about the head CG z-axis between about 360 kg·mm2 and about 500 kg·mm2.
6. Example F
According to another embodiment, a golf club head has at least two weight tracks and/or weight ports (any combination thereof) and at least corresponding first and second weights disposed in the weight tracks/weight ports. The golf club head can have a CG with a head origin x-axis coordinate between about 2 mm and about 6 mm and a head origin y-axis coordinate between about 30 mm and about 40 mm. In a specific embodiment, the golf club head has a volume between about 100 cm3 and about 600 cm3, and the sum of the body mass and the total weight mass is between about 100 grams and about 245 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 220 kg·mm2 and about 360 kg·mm2 and a moment of inertia about the head CG z-axis between about 360 kg·mm2 and about 500 kg·mm2.
7. Example G
According to another embodiment, a golf club head has first and second weight tracks and/or weight ports and at least corresponding first and second weights disposed in the weight tracks/ports. The golf club head can have a CG with a head origin x-axis coordinate between about −2 mm and about 1 mm and a head origin y-axis coordinate between about 31 mm and about 37 mm. In a specific embodiment, the golf club head has a volume between about 240 cm3 and about 460 cm3, and the sum of the body mass and the total weight mass is between about 180 grams and about 215 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 220 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 360 kg·mm2 and about 450 kg·mm2.
8. Example H
According to another embodiment, a golf club head has first and second weight tracks and/or weight ports and at least corresponding first and second weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about 2 mm and about 5 mm and a head origin y-axis coordinate between about 31 mm and about 37 mm. In a specific embodiment, the golf club head has a volume between about 440 cm3 and about 460 cm3, and the sum of the body mass and the total weight mass is between about 180 grams and about 215 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 220 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 360 kg·mm2 and about 450 kg·mm2.
9. Example I
According to another embodiment, a golf club head has first and second weight tracks and/or weight ports and corresponding first and second weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about −4 mm and about 4 mm and a head origin y-axis coordinate between about 20 mm and about 30 mm. In a specific embodiment, the golf club head has a volume between about 100 cm3 and about 250 cm3, a loft between about 13 degrees and about 30 degrees, and the sum of the body mass and the total weight mass is between about 198 grams and about 222 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 70 kg·mm2 and about 140 kg·mm2 and a moment of inertia about the head CG z-axis between about 200 kg·mm2 and about 350 kg·mm2.
10. Example J
According to another embodiment, a golf club head has first and second weight tracks and/or weight ports and corresponding weights disposed in the tracks. The golf club head has a CG with a head origin x-axis coordinate between about −2 mm and about 6 mm and a head origin y-axis coordinate between about 20 mm and about 30 mm. In a specific embodiment, the golf club head has a volume between about 100 cm3 and about 210 cm3, a loft between about 13 degrees and about 30 degrees, and the sum of the body mass and the total weight mass is between about 180 grams and about 222 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 70 kg·mm2 and about 140 kg·mm2 and a moment of inertia about the head CG z-axis between about 200 kg·mm2 and about 350 kg·mm2.
11. Example K
According to another embodiment, a golf club head has first and second weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about −4 mm and about 4 mm and a head origin y-axis coordinate between about 20 mm and about 30 mm. In a specific embodiment, the golf club head has a volume between about 100 cm3 and about 250 cm3, a loft between about 13 degrees and about 30 degrees, and the sum of the body mass and the total weight mass is between about 178 grams and about 222 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 70 kg·mm2 and about 140 kg·mm2 and a moment of inertia about the head CG z-axis between about 200 kg·mm2 and about 350 kg·mm2.
12. Example L
According to another embodiment, a golf club head has first and second weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports, and at least one weight port and corresponding weight. A first weight has a head origin x-axis coordinate between about −40 mm and about −20 mm, a head origin y-axis coordinate between about 20 mm and about 40 mm, and a mass. The golf club head has a CG with a head origin x-axis coordinate between about −2 mm and about 6 mm and a head origin y-axis coordinate between about 20 mm and about 30 mm. In a specific embodiment, the golf club head has a volume between about 100 cm3 and about 230 cm3, a loft between about 13 degrees and about 30 degrees, and the sum of the body mass and the total port mass is between about 178 grams and about 222 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 70 kg·mm2 and about 140 kg·mm2 and a moment of inertia about the head CG z-axis between about 200 kg·mm2 and about 350 kg·mm2.
13. Example M
According to another embodiment, a golf club head has first, second, and third weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about −1 mm and about 4 mm and a head origin y-axis coordinate between about 23 mm and about 40 mm. In a specific embodiment, the golf club head has a volume between about 360 cm3 and about 600 cm3 and the sum of the body mass and the total weight mass is between about 181 grams and about 231 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
14. Example N
According to another embodiment, a golf club head has first, second, and third weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about −1 mm and about 4 mm and a head origin y-axis coordinate between about 20 mm and about 37 mm. In a specific embodiment, the golf club head has a volume between about 360 cm3 and about 500 cm3 and the sum of the body mass and the total weight mass is between about 171 grams and about 231 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
15. Example O
According to another embodiment, a golf club head has first, second, and third weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about −3 mm and about 3 mm and a head origin y-axis coordinate between about 20 mm and about 38 mm. In a specific embodiment, the golf club head has a volume between about 360 cm3 and about 500 cm3 and the sum of the body mass and the total weight mass is between about 181 grams and about 211 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
16. Example P
According to another embodiment, a golf club head has first, second, and third weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about 0 mm and about 6 mm and a head origin y-axis coordinate between about 22 mm and about 38 mm. In a specific embodiment, the golf club head has a volume between about 360 cm3 and about 460 cm3 and the sum of the body mass and the total weight mass is between about 191 grams and about 211 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
17. Example Q
According to another embodiment, a golf club head has first, second, and third weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about 0 mm and about 6 mm and a head origin y-axis coordinate between about 20 mm and about 38 mm. In a specific embodiment, the golf club head has a volume between about 360 cm3 and about 460 cm3 and the sum of the body mass and the total weight mass is between about 191 grams and about 211 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
18. Example R
According to another embodiment, a golf club head has first, second, and third weight tracks and/or ports and corresponding weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about −3 mm and about 3 mm and a head origin y-axis coordinate between about 22 mm and about 38 mm. In a specific embodiment, the golf club head has a volume between about 360 cm3 and about 460 cm3 and the sum of the body mass and the total weight mass is between about 180 grams and about 221 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
19. Example S
According to another embodiment, a golf club head has first, second, third, and fourth weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports. The golf club head can have a CG with a head origin x-axis coordinate between about −1 mm and about 4 mm and a head origin y-axis coordinate between about 23 mm and about 40 mm. In a specific embodiment, the golf club head has a volume between about 140 cm3 and about 600 cm3 and the sum of the body mass and the total weight mass is between about 100 grams and about 250 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
20. Example T
According to another embodiment, a golf club head has first, second, third, and fourth weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about −1 mm and about 4 mm and a head origin y-axis coordinate between about 20 mm and about 37 mm. In a specific embodiment, the golf club head has a volume between about 360 cm3 and about 500 cm3 and the sum of the body mass and the total weight mass is between about 171 grams and about 231 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
21. Example U
According to another embodiment, a golf club head has first, second, third, and fourth weight tracks and/or weight ports and corresponding weights disposed in the tracks/ports. The golf club head has a CG with a head origin x-axis coordinate between about −3 mm and about 3 mm and a head origin y-axis coordinate between about 22 mm and about 38 mm. In a specific embodiment, the golf club head has a volume between about 360 cm3 and about 500 cm3 and the sum of the body mass and the total port mass is between about 191 grams and about 211 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
22. Example V
According to another embodiment, a golf club head has first, second, third, and fourth weight ports and corresponding first, second, third, and fourth weights disposed in the ports. The first weight has a head origin x-axis coordinate between about —47 mm and about −27 mm, a head origin y-axis coordinate between about 10 mm and about 30 mm, and a mass between about 1 gram and about 3 grams. The second weight has a head origin x-axis coordinate between about −30 mm and about −10 mm, a head origin y-axis coordinate between about 63 mm and about 83 mm, and a mass between about 1 gram and about 3 grams. The third weight has a head origin x-axis coordinate between about 8 mm and about 28 mm, a head origin y-axis coordinate between about 63 mm and about 83 mm, and a mass between about 6 grams and about 18 grams. The fourth weight has a head origin x-axis coordinate between about 24 mm and about 44 mm, a head origin y-axis coordinate between about 10 mm and about 30 mm, and a mass between about 6 grams and about 18 grams. The golf club head has a CG with a head origin x-axis coordinate between about 0 mm and about 6 mm and a head origin y-axis coordinate between about 22 mm and about 38 mm. In a specific embodiment, the golf club head has a volume between about 360 cm3 and about 460 cm3 and the sum of the body mass and the total port mass is between about 191 grams and about 211 grams. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 180 kg·mm2 and about 280 kg·mm2 and a moment of inertia about the head CG z-axis between about 300 kg·mm2 and about 450 kg·mm2.
23. Example W
According to another embodiment, a golf club head has a front channel and a rear weight track and at least one weight port, and corresponding weights disposed in the weight tracks and weight ports. In any of these examples, weights in a weight track can be adjustable and movable along the track. The golf club head has a volume between about 140 cm3 and about 600 cm3, and a CG with a head origin y-axis coordinate greater than or equal to about 15 mm. In a specific embodiment, the first and second weights each have a head origin y-axis coordinate between about 0 mm and about 130 mm. In a specific embodiment, the golf club head has a CG with a head origin x-axis coordinate between about −10 mm and about 10 mm and a y-axis coordinate between about 15 mm to about 25 mm, or between about 25 mm to about 35 mm, or between about 35 mm to about 50 mm. In a more specific embodiment, the golf club head has a moment of inertia about the head CG x-axis between about 140 kg·mm2 and about 400 kg·mm2, a moment of inertia about the head CG z-axis between about 250 kg·mm2 and about 600 kg·mm2, and a head volume greater than or equal to 250 cm3.
24. Example X
Table 2 below provides mass properties for an embodiment of the club head 2 shown in FIGS. 1-10 having two sliding weight tracks. The mass properties in the column “Center-Front” are for when the two weights 32, 34 in the front weight track 30 are in the center of the track (as shown in FIG. 2) and the weight 38 in the rear track 36 is at the front end of the track. The mass properties in the column “Split-Back” are for when the two weights 32, 34 are at the toe and heel ends of the track 30 and the weight 38 is at the rear end of the track 36. As shown in Table 2, the moment of inertia about the z-axis Izz of the club head can be significantly adjusted (more than 10%) by moving the adjustable weights 32, 34, 38. Several other mass characteristics of the club head can similarly be adjusted by adjusting one or more of the weights. For example, repositioning the two weights 32, 34 in the front weight track 30 from the toe side 12 to the heel side 14 moves the head origin x-axis coordinate between about −3 mm and about 3 mm, moves the head origin y-axis coordinate between about 0 mm and about 0.5 mm, and moves the head origin z-axis coordinate between about 0 mm and about 0.7 mm. The table values below should be understood to include conventional units, such as those used elsewhere herein or in the incorporated references.











TABLE 2







Configuration:





MASS PROPERTIES
Center-Front
Split-Back




















TOTAL MASS (w/snot):
207.1
207.1



VOLUME:
429
429



ADDRESS AREA:
11931
11931



CGX:
0.4
0.5



CGY:
28.0
31.0



CGZ:
−4.4
−3.9



Z UP:
25.4
26.0



ASM DELTA-1:
13.1
15.3



ASM DELTA-2:
33.8
34.0



ASM DELTA-3:
73.8
73.3



I1:
220
242



I2:
304
317



I3:
400
445



Ixx:
237
265



Iyy:
288
298



Izz:
398
442



I HOSEL AXIS:
624
678



PATENT Ixx MIN:
275
275



CG ANGLE:
21.2
24.2










25. Example Y
Table 3 below provides ranges for mass properties for embodiments of the club head 100 shown in FIGS. 11-18. Many of the listed mass properties can be adjusted by adjusting the position of the weight 128 and/or by exchanging the weight 128 for another weight having a different mass or weight distribution.










TABLE 3







MASS PROPERTIES:










TOTAL MASS (w/snot):
180-220



VOLUME:
300-500



ADDRESS AREA:
11,000-13,000



CGX:
1.4-1.8



CGY:
28.0-31.0



CGZ:
−1.5 to −1.9



Z UP:
26-30



ASM DELTA-1:
12-14



ASM DELTA-2:
36-40



ASM DELTA-3:
70-78



I1:
200-240



I2:
280-320



I3:
280-320



Ixx:
220-250



Iyy:
260-320



Izz:
360-500



I HOSEL AXIS:
666



PATENT Ixx MIN:
270.0



CG ANGLE:
19.1










Having illustrated and described the principles of the illustrated embodiments, it will be apparent to those skilled in the art that the embodiments can be modified in arrangement and detail without departing from such principles. Embodiments having any combination of the features, elements, and characteristics disclosed herein, and/or disclosed in the references that are incorporated herein by reference, are included as part of this disclosure.
In view of the many possible embodiments to which the principles of the disclosed technology may be applied, it should be recognized that the illustrated embodiments are only examples and should not be taken as limiting the scope of the disclosure. Rather, the scope of the disclosure is at least as broad as the following exemplary claims. We therefore claim all that comes within the scope of the following claims.

## Claims

1. A golf club head comprising:
a body having a face, a crown and a sole together defining an interior cavity;
a first weight track formed in the sole and extending generally in a front-rear direction, the first weight track adapted to receive at least one weight such that a position of the at least one weight along the first weight track is adjustable;
a mass pad at a rear end of the body, the mass pad having a thickness greater than a surrounding wall portion of body; and
a first rib extending across an internal side of the sole from a rear end of the first weight track to the mass pad, wherein the first rib is co-formed with and permanently fixed directly to the sole from the first weight track to the mass pad;
an adjustable head- shaft attachment system configurable to selectively adjust the orientation of the golf club head relative to a golf club shaft.

2. The golf club head of claim 1, wherein the mass pad is a thickened wall portion of the sole.

3. The golf club head of claim 1, wherein the mass pad has a thickness of at least 2.0 mm at a location where the rib joins the mass pad.

4. The golf club head of claim 1, wherein the mass pad is positioned below a rear end of the crown.

5. The golf club head of claim 1, further comprising:
a second rib extending in a heel-toe direction across the internal side of the sole and the first weight track at an angle relative to the sole-crown direction and at a location between a front end of the first weight track and the rear end of the first weight track; and
a third rib fixed to the second rib and extending across the internal side of the sole in the front-rear direction from the second rib to the mass pad.

6. The golf club head of claim 1, further comprising a second weight track formed in the sole and extending generally in a heel-toe direction in front of the first weight track, the second weight track adapted to receive at least one weight movably positionable along the second weight track.

7. The golf club head of claim 6, further comprising a second rib extending from the first weight track to a heel portion of the second weight track within the interior cavity.

8. The golf club head of claim 6, further comprising a second rib extending from a toe portion of the second weight track to a toe-side wall of the body within the interior cavity.

9. The golf club head of claim 1, wherein the golf club head has an overall vibration frequency generated upon impact with a golf ball on the face that is greater than 3,000 Hz.

10. The golf club head of claim 1, wherein the first rib is parallel to the front-rear direction and co-planar with a plane that is parallel to a sole-crown direction.

11. The golf club head of claim 1, wherein the golf club head has a CG with a head origin x-axis coordinate between about −3 mm and about 2 mm and a head origin y-axis coordinate between about 30 mm and about 40 mm.

12. The golf club head of claim 11, wherein the golf club head has a moment of inertia about the head CG x-axis between about 220 kg·mm2 and about 360 kg·mm2 and a moment of inertia about the head CG z-axis between about 360 kg·mm2 and about 500 kg·mm2.

13. The golf club head of claim 1, wherein the first weight track comprises a channel with at least one ledge extending along the channel, wherein the at least one weight is configured to clamp the at least one ledge at selected locations along the channel;
wherein the at least one weight is located entirely external to the interior cavity of the body and the weight comprises an outer member, an inner member, and a fastener that connects the outer member to the inner member, wherein the outer member and the inner member are secured together with the fastener while positioned on opposite sides of the at least one ledge; and
wherein tightening the fastener pulls the outer member towards the inner member.

14. The golf club head of claim 13, wherein the first weight track comprises a weight installation cavity that is located within a portion of the first weight track in which the at least one weight is configured to clamp the at least one ledge.

15. The golf club head of claim 14, wherein the first weight track is configured to allow angled insertion of the inner member of the at least one weight under the at least one ledge and into the channel.

16. A golf club head comprising:
a hollow body defining an interior cavity and comprising a sole, a crown, a toe side, a heel side, a front side, a rear side, a hosel, and a striking face;
at least one weight track formed in the sole, the at least one weight track adapted to receive at least one weight such that a position of the at least one weight along the at least one weight track is adjustable;
a first rib extending across a rear portion of the sole from the at least one weight track rearwardly to a rear end of the sole, wherein the first rib is co-formed with and permanently fixed directly to the sole;
a second rib extending across a rear portion of the sole from the at least one weight track rearwardly to a rear end of the sole, wherein the second rib is co-formed with and permanently fixed directly to the sole;
a third rib extending from a toe side of the at least one weight track in a toeward direction across the sole, wherein the third rib is co-formed with and permanently fixed directly to the sole; and
a fourth rib extending from a heel side of the at least one weight track in a heelward direction across the sole, wherein the fourth rib is co-formed with and permanently fixed directly to the sole.

17. The golf club head of claim 16, wherein the third rib further extending from the at least one weight track in a rearward direction across the sole.

18. The golf club head of claim 16, further comprising a fifth rib extending across the at least one weight track in a heel-toe direction near the rear end of the sole.

19. The golf club head of claim 16, further comprising an adjustable head-shaft attachment system configurable to selectively adjust the orientation of the golf club head relative to a golf club shaft.

20. The golf club head of claim 19, wherein the at least one weight track comprises a channel with at least one ledge extending along the channel, wherein the at least one weight is configured to clamp the at least one ledge at selected locations along the channel;
wherein the at least one weight is located entirely external to the interior cavity of the body and the weight comprises an outer member, an inner member, and a fastener that connects the outer member to the inner member, wherein the outer member and the inner member are secured together with the fastener while positioned on opposite sides of the at least one ledge; and
wherein tightening the fastener pulls the outer member towards the inner member.

21. The golf club head of claim 20, wherein the at least one weight track comprises a weight installation cavity that is located within a portion of the at least one weight track in which the at least one weight is configured to clamp the at least one ledge.

22. The golf club head of claim 21, wherein the at least one weight track is configured to allow angled insertion of the inner member of the at least one weight under the at least one ledge and into the channel.

23. The golf club head of claim 20, wherein when the weight is unsecured there is a distance between the outer member and the inner member and when the weight is secured the distance between the outer member and the inner member decreases.

24. The golf club head of claim 20, wherein when the weight is installed in the at least one weight track but not secured to the at least one ledge a distance between the outer member and the inner member is greater than when the weight is secured to the at least one ledged such that the weight can be slid along the at least one ledge.

25. The golf club head of claim 19, wherein the golf club head has a CG with a head origin x-axis coordinate between about −3 mm and about 2 mm and a head origin y-axis coordinate between about 30 mm and about 40 mm.

26. The golf club head of claim 25, wherein the golf club head has a moment of inertia about the head CG x-axis between about 220 kg·mm2 and about 360 kg·mm2 and a moment of inertia about the head CG z-axis between about 360 kg·mm2 and about 500 kg·mm2.