US20070155529A1 - Quick disconnect system for coupling a golf club head with a golf club shaft - Google Patents
Quick disconnect system for coupling a golf club head with a golf club shaft Download PDFInfo
- Publication number
- US20070155529A1 US20070155529A1 US11/614,156 US61415606A US2007155529A1 US 20070155529 A1 US20070155529 A1 US 20070155529A1 US 61415606 A US61415606 A US 61415606A US 2007155529 A1 US2007155529 A1 US 2007155529A1
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- fastener
- club head
- bore
- golf club
- shaft
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/36—Training appliances or apparatus for special sports for golf
- A63B69/3658—Means associated with the ball for indicating or measuring, e.g. speed, direction
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/02—Joint structures between the head and the shaft
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0433—Heads with special sole configurations
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0437—Heads with special crown configurations
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0466—Heads wood-type
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/46—Measurement devices associated with golf clubs, bats, rackets or the like for measuring physical parameters relating to sporting activity, e.g. baseball bats with impact indicators or bracelets for measuring the golf swing
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
- A63B24/0021—Tracking a path or terminating locations
- A63B2024/0028—Tracking the path of an object, e.g. a ball inside a soccer pitch
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B2053/0491—Heads with added weights, e.g. changeable, replaceable
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
- A63B2071/065—Visualisation of specific exercise parameters
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/18—Inclination, slope or curvature
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/30—Speed
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/30—Speed
- A63B2220/34—Angular speed
- A63B2220/35—Spin
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2225/00—Miscellaneous features of sport apparatus, devices or equipment
- A63B2225/50—Wireless data transmission, e.g. by radio transmitters or telemetry
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/005—Club sets
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0416—Heads having an impact surface provided by a face insert
- A63B53/042—Heads having an impact surface provided by a face insert the face insert consisting of a material different from that of the head
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Biophysics (AREA)
- Human Computer Interaction (AREA)
- Golf Clubs (AREA)
Abstract
A hosel fitting for connecting a shaft to one of a plurality of club heads comprises a first portion of a tubular structure configured to be affixed to the end of the shaft and a second portion of the tubular structure configured to be received by a bore in a club head. The second portion of the tubular portion can be configured to extend down into the bore. The hosel fitting can also comprise a fastener receiving portion for receiving a fastener configured to affix the hosel fitting to any one of the plurality of club heads.
Description
- This application claims priority as a Continuation under 35 U.S.C. §120 to U.S. application Ser. No. 10/053,797, entitled “Golf Club Woods With Wood Club Head Having A Selectable Center of Gravity and a Selectable Shaft,” filed Jan. 18, 2002, which is incorporated herein by reference as if set forth in full.
- 1. Field
- This invention relates to wood golf clubs and, more particularly, to such wood golf clubs wherein the vertical center of gravity of the wood club head is selectable.
- 2. Background
- The golf clubs that are used to hit the golf ball the greatest distances are the “woods”. The woods originally were made of natural wood but today are made of metals or composite materials. However, they continue to be termed “wood golf clubs” or “woods”, and that terminology is used herein.
- The wood golf clubs have wood club heads with relatively large mass, and loft angles of the faces relative to the soles selected to achieve a long flight distance of the struck golf ball. A golf player typically carries up to five woods, which are distinct from each other in that the loft angle varies from about 7 to about 11 degrees for a driver wood golf club, and about 12 degrees and higher for other wood golf clubs. Of the golf clubs termed “woods”, the drivers, with relatively low loft angles, are designed to hit the golf ball the greatest distances. The golfer selects the required wood golf club from this group of wood golf clubs. A wood golf club, and normally a driver, is used for most long shots from the tee, and may be used on intermediate shots on some longer holes.
- As the game of golf has been studied analytically, it has become clear that the design of the wood golf club plays a part in the ability of the player to hit long, accurately directed shots. For example, the shapes of the wood club heads have been optimized. Large-sized wood club heads have been introduced. Wood club heads have been designed to allow the player to add weight to the wood club head.
- While these approaches yield benefits, the present inventors have observed that most players still cannot obtain wood golf clubs that are optimal for the individual. Players vary according to weight, height, strength, skill and other factors. Wood golf clubs may be purchased with varying shaft lengths, but the wood club heads themselves do not change, except as to the loft angle of the face and the ability to add weight to the wood club head in some designs. These approaches do not provide the required flexibility in selecting the wood club heads that are best suited to the individual player.
- There is a need for an improved approach to the design of wood club heads, which allows the player to obtain wood golf clubs that are optimized for the individual. The present invention fulfills this need, and further provides related advantages.
- A hosel fitting for connecting a shaft to one of a plurality of club heads comprises a first portion of a tubular structure configured to be affixed to the end of the shaft and a second portion of the tubular structure configured to be received by a bore in a club head. The second portion of the tubular portion can be configured to extend down into the bore. The hosel fitting can also comprise a fastener receiving portion for receiving a fastener configured to affix the hosel fitting to any one of the plurality of club heads.
- In one aspect, the bore, hosel fitting, and shaft are always substantially in line. In other words, the purpose of the hosel fitting is not to realign the angel of the shaft the club head, i.e., it is not intended to adjust the lie angel. Rather, the hosel fitting is meant to allow anyone of a plurality of shafts to be interfaced with a club head, so that differnet shaft configurations can be tested without changing any other parameters.
- Other features and advantages of the present invention will be apparent from the following more detailed description of the preferred embodiment, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention. The scope of the invention is not, however, limited to this preferred embodiment.
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FIG. 1 is a perspective view of a wood golf club according to the invention; -
FIGS. 2-4 are sectional views taken on line 2-2 ofFIG. 1 , illustrating a preferred technique for adjusting the center of gravity of the wood club head; -
FIGS. 5-7 are side sectional views, like those ofFIGS. 2-4 , and taken on line 2-2 ofFIG. 1 , illustrating a second technique for adjusting the center of gravity of the wood club head; -
FIG. 8 is an enlarged, partially exploded, sectional view of the wood club head, taken on line 8-8 ofFIG. 1 ; and -
FIG. 9 is a block diagram of a method of providing a wood golf club for a player. -
FIG. 1 depicts awood golf club 20. Thewood golf club 20 is sometimes termed a “wood” club or a “wood”. Thewood golf club 20 includes awood club head 22 and a generally cylindricalwood club shaft 24 affixed to thewood club head 22. Thewood club shaft 24 may be of any operable material of construction, such as metal (e.g., titanium, aluminum), composite (e.g., graphite/epoxy), or even natural wood; produced by any operable method; of any operable diameter; of any operable length; and of any operable physical properties (e.g., elastic modulus, strength). One of the features of the present invention, as will be discussed subsequently in relation toFIG. 8 , is that thewood club shaft 24 is readily interchangeable. -
FIG. 2 is a sectional view through thewood club head 22. In the preferred form, the basic structure of thewood club head 22 preferably includes two pieces, a one-piecewood head body 26 and a one-piece woodhead face plate 28 affixed to thewood head body 26 by aweldment 30, by an adhesive, or by other means for affixing. Thewood head body 26 may be described in terms of two regions pertinent to the present discussion, a generally planar sole 32 that rests upon theground 34, and acrown 36 that is visible to the eye of the player when the player holds thewood golf club 20 and looks downwardly toward thewood club head 22. Thewood head body 26 is preferably hollow, and thecrown 36 is convexly (outwardly) curved relative to the interior of thewood head body 26. Thecrown 36 is the convexly, outwardly curved portion of thewood head body 26 that is uppermost inFIG. 2 . The sole 32 is the lowermost portion of thewood head body 26 inFIG. 2 , which is flat over most of its area and slightly upwardly curved toward the left hand side ofFIG. 2 (remote from the wood head face plate 28). The sole 32 meets and is contiguous with thecrown 36 on the left hand side ofFIG. 2 . - The
wood head body 26 may be made of any operable material, but is preferably made of a metal alloy such as a titanium alloy. Thewood head body 26 may be made by any operable manufacturing process, but is preferably made by a casting technique such as lost wax casting or die casting. It may also be forged or machined. The woodhead face plate 28 is made separately from thewood head body 26. The woodhead face plate 28 is preferably also a metal alloy such as a titanium alloy, but a different alloy composition than used in thewood head body 26. The woodhead face plate 28 is preferably forged. After thewood head body 26 and the woodhead face plate 28 are fabricated separately, they are joined by fitting the woodhead face plate 28 into a recess formed on thewood head body 26 and then welded, adhesively bonded, or otherwise attached in place by theweldment 30 that extends around the periphery of the woodhead face plate 28. - The inventors have determined that an important performance characteristic of the
wood golf club 20 is a vertical location of a center ofgravity 38 of thewood head body 26. The “vertical location” is a distance DCG from anexternal surface 40 of the sole 32 toward thecrown 36 measured along aline 42 perpendicular to the planar portion of the sole 32. -
FIGS. 2-4 illustrate threewood club heads 22 for a set ofwood golf clubs 20. These three wood club heads 22 ofFIGS. 2-4 have substantially the same external shapes and volumes. The three wood club heads 22 also have substantially the same total weights. The shapes, volumes, and weights of the three wood club heads 22 in this set ofwood golf clubs 20 are substantially the same in order to allow optimization of the selection of the vertical location of the center ofgravity 38, without simultaneously varying other parameters such as shape, loft angle, and total weight of thewood club head 22. - The vertical locating of the center of
gravity 38 of the three wood club heads 22, while maintaining the limitation of substantially constant external shape, volume, and total weight, may be accomplished by any operable approach.FIGS. 2-4 illustrate a preferred approach, changing the thicknesses of the sole 32 and thecrown 36 to redistribute weight and move the center ofgravity 38 vertically. The thickness changes and the movement of the center ofgravity 38 are quite small and may be difficult to discern in precisely scaled drawings, so inFIGS. 2-4 the thickness variations and the vertical displacement of the center ofgravity 38 are exaggerated. In thewood club head 22 ofFIG. 2 , a thickness ts of the sole 32 is relatively large, and a thickness tc of thecrown 36 is relatively small, so that the weight of the sole is relatively large and the weight of the crown is relatively small. Consequently, the center ofgravity 38 is relatively low (i.e., near to the sole 32). (The exact locations where the thickness of the sole and the thickness of the crown are measured is not critical, as long as they are generally in the centers of the respective regions and are consistently positioned from wood club head to wood club head within a set.) The weight of a region such as the crown or the sole generally correlates with its thickness within this set of club heads, so that the thicker the region, the greater its weight. In thewood club head 22 ofFIG. 3 , the thickness ts of the sole 32 is smaller than that of thewood club head 22 ofFIG. 2 , and the thickness tc of thecrown 36 is greater than that of thewood club head 22 ofFIG. 2 . The result is that the center ofgravity 38 of thewood club head 22 ofFIG. 3 is higher (i.e., further from the sole 32) than the center ofgravity 38 of thewood club head 22 ofFIG. 2 . In thewood club head 22 ofFIG. 4 , the thickness ts of the sole 32 is smaller than that of thewood club head 22 ofFIG. 3 , and the thickness tc of thecrown 36 is greater than that of thewood club head 22 ofFIG. 3 . The result is that the center ofgravity 38 of thewood club head 22 ofFIG. 4 is higher (i.e., further from the sole 32) than the center ofgravity 38 of thewood club head 22 ofFIG. 3 . Thewood club head 22 ofFIG. 2 is termed the “L” (low) center of gravity variation, thewood club head 22 ofFIG. 3 is termed the “M” (medium) center of gravity variation, and thewood club head 22 ofFIG. 4 is termed the “H” (high) center of gravity variation. More variations in the vertical location of the center ofgravity 38 may be provided than the three illustrated, but initial testing indicates that three variations are sufficient for most applications. The changes in thickness of the sole 32 and of thecrown 36 in each case are selected so that the total weight of thewood club head 22 remains the same. The changes in thickness are accommodated by varying the position of aninner wall 44 of thewood club head 22, so that the shape of anouter wall 46 remains unchanging. - The
wood head bodies 22 ofFIGS. 2-4 are preferably manufactured by a lost wax casting approach. This technique is known generally for the manufacture of hollow golf club head bodies of other designs, see for example U.S. Pat. No. 5,429,365. Generally, there is an outer casting shell that defines the position, shape, and size of theouter wall 46, and a casting core that defines the position, shape, and size of theinner wall 44. In the present case, the outer casting shell used for the three wood club heads 22 ofFIGS. 2-4 is the same, so that thewood head bodies 22 have the same external shape, loft angle, and volume, about 335 cubic centimeters in the preferred approach. The casting cores used to cast the threewood head bodies 26 have a constant volume, so that the total amount of metal (and thence the weight) in each of thewood head bodies 26 is a constant amount, preferably in the range of from about 195 to about 205 grams in the preferred approach wherein thewood head bodies 26 are cast from the titanium alloy titanium-6 weight percent aluminum-4 weight percent vanadium. The casting cores are differently positioned, so as to define the thicknesses of the sole 32 and thecrown 36 in the manner discussed previously to produce the three different types of wood club heads 22 ofFIGS. 2-4 . - Once the outer casting shell and the casting core are positioned, molten metal is poured into the space therebetween and cooled to solidify and to form each of the
wood head bodies 22. Any operable castable material may be used, but a titanium alloy such as titanium-6 weight percent aluminum-4 weight percent vanadium is preferred. After the cast metal has solidified, the outer casting shell and the casting core are removed, leaving the final hollow castwood club head 22 having a cast microstructure. In alternative fabrication techniques, such as a forged or a machined microstructure, the finalwood club head 22 has a corresponding microstructure such as a forged or a machined microstructure, respectively. - Other operable techniques for changing the vertical location of the center of
gravity 38 may be used, andFIGS. 5-7 illustrate one such alternative approach. The pertinent parts of the prior discussion of the embodiments ofFIGS. 2-4 are incorporated here. In the embodiment ofFIGS. 5-7 , asole fitting 48 is formed in the sole 32, and a crown fitting 50 is formed in thecrown 36. Thesefittings sole weight insert 52 and a crown weight insert 54 are inserted into the respectivesole fitting 48 andcrown fitting 50. In a preferred version of this embodiment, thefittings sole weight insert 52 and the crown weight insert 54 is maintained constant, so that the total weight of the wood club heads 22 ofFIGS. 5-7 remains constant. - The approach of
FIGS. 2-4 has the advantage that the weight change is distributed broadly over the sole and the crown. The approach ofFIGS. 5-7 has the advantage that the weight inserts 52 and 54 may be readily changed. The approach ofFIGS. 5-7 has the additional advantage that the total of the weight inserts 52 and 54 may be readily changed, if desired. - The wood club heads of
FIGS. 2-4 and 5-7 are illustrated as being conventional in configuration, except for the ability to change the vertical location of the center of gravity. Other modifications that have been found or may be found useful in wood club heads, such as changes in external shape or total weight, or material of construction, may be utilized in conjunction with the present approach. - The approaches of
FIGS. 2-4 andFIGS. 5-7 are used to change the vertical location of the center ofgravity 38. Another factor that significantly influences the performance of thewood golf club 20 is the nature of thewood club shaft 24.FIG. 8 illustrates an embodiment of the present approach that allows various types ofwood club shafts 24 to be used with the variations ofFIGS. 2-4 andFIGS. 5-7 . The preferredwood club head 22 of the present approach has no integral hosel, which is a tubular portion that extends upwardly from thecrown 36 of the conventional wood club head. The wood club shaft of the conventional wood club is inserted into the hosel and affixed to the hosel with an adhesive such as an epoxy. - In the present approach as seen in
FIG. 8 , thewood club head 22 has no hosel, but instead has abore 60 fabricated into thewood head body 26. Thebore 60 has a base 62 that defines the bottom of thebore 60. An aperture 64 extends through thebase 62. Thebore 60 is sized to receive a hosel fitting 66 affixed to anend 68 of thewood club shaft 24. (The hosel fitting 66 is not integral with thewood club head 22.) Thebore 60 is oriented in thewood club head 22 so that thewood club shaft 24 has the proper orientation to thewood club head 22 and to the woodhead face plate 28. A fastener, preferably a male-threaded fastener 70 such as the illustrated bolt, extends through the aperture 64 of the base 62 to engage the female-threaded hosel fitting 66, and thence thewood club shaft 24, to the respectivewood club head 22, when the hosel fitting 66 is inserted into thebore 60. The sole 32 is locally recessed atrecess 72 so that the head of the fastener 70 does not strike theground 34 when thewood golf club 20 is swung. With this approach, thewood club shaft 24 may be readily changed so that different shafts may be tested and possibly used with the various wood club heads 22. Shafts of different lengths, diameters, materials of constructions, elastic properties, and other characteristics may thence be utilized. - An important application of the present approach is to maximize the performance of the golf player for the wood golf clubs, by providing the optimal wood golf club equipment for the individual player.
FIG. 9 illustrates this approach. A wood golf club of a test configuration is provided, numeral 80. The performance of the wood golf club test configuration when used by the particular player is analyzed, numeral 82. Thesteps wood club head 22 and particularly the vertical location of the center of gravity of the wood club head, as discussed above, the type ofdrive club shaft 24 that is installed to thewood club head 22, and the type of golf ball being hit. This procedure would be used for a first set of wood golf clubs with a constant selected loft angle, and then may be used for additional sets of wood golf clubs with a different (but constant within any one set) loft angle. The present procedure is expected to yield the most benefits for the wood golf clubs with the lowest loft angles, termed the “drivers”, but it may be used as well for other wood golf clubs. - The following performance tables for golfers A, B and C, employees of the assignee, were developed by the procedure of
FIG. 9 during the initial testing of the present approach. Each entry in the tables represents the average of multiple hits of a single commercial brand of golf ball. Performance was evaluated using a standard Launch Monitor device for analyzing golf ball movement. In each case, the golfer used threewood golf clubs 20. Thewood club head 22 in each case was a 335 cubic centimeter, 200 gram, 7.5 degree loft angle club. The variation between the wood golf clubs was a low (L), medium (M), or high (H) vertical position of the center ofgravity 38. The following table gives the approximate thicknesses, measured in inches, of the sole 32 and thecrown 36 at the same respective point on each wood club head, and the resulting vertical position of the center of gravity in millimeters.Club Ident. Sole Thickness Crown Thickness Center of Gravity H 0.040 0.060 32 M 0.050 0.050 30 L 0.060 0.040 28 - In the following performance tables, the table entries are, from left to right, the wood club head identification (L, M, or H), the initial launch speed (Vo) of the ball in miles per hour, the spin rate (SR) of the ball in revolutions per minute, the launch angle (LA) of the ball in degrees, the carry distance (CD) on the fly of the golf ball in yards, and the total distance (TD) of the golf ball on the fly and rolling, in yards.
Golfer A Club Ident Vo SR LA CD TD H 160.5 2066 8.6 228.7 265.4 M 160.3 2163 9.4 237.9 268.2 L 161.2 2436 9.7 239.0 271.9 -
Golfer B Club Ident Vo SR LA CD TD H 158.9 1992 9.9 229.8 266.2 M 158.8 2263 10.0 233.7 267.8 L 159.7 2745 10.2 240.5 271.1 -
Golfer C Club Ident Vo SR LA CD TD H 161.4 3169 14.8 250.9 276.7 M 159.5 3400 15.3 247.8 272.2 L 160.1 3384 16.3 248.7 272.8 - The results set forth in these tables are not to be interpreted as good or bad, consistent or inconsistent. These results simply reflect the performance of each individual player using various types of wood club combinations and for a single type of golf ball.
- In these data, Golfers A and B each achieves the greatest carry distance and total distance with the low center of gravity wood club head. Golfer C, on the other hand, achieves the greatest carry distance and total distance with the high center of gravity wood club head. Based on this data, the selection of wood club heads for Golfers A and B would be different than for Golfer C. These extremely limited data are presented to illustrate the operation of the present approach. In practice, much more data would be gathered for each player, including the effects of variations in the shape and volume of the wood club head, the weight of the wood club head, the loft angle of the wood club head, the type of wood club shaft, the materials of construction of the wood club shaft and the wood club head, the golf ball played, and even other features available in wood club heads.
- This approach may be used in a custom-fitting procedure to find a single wood golf club that is optimal for that player, taking into account all of the variables discussed above. Once that single wood golf club is identified, then the illustrated version with the removable shaft (
FIG. 8 ) may be used by the player. To make the illustrated embodiment into a permanent wood golf club, the hosel fitting 66 may be fixed in place with a permanent adhesive, and a cap may be fitted over the head of the fastener 70 and fixed in place with the permanent adhesive. In other cases, other variables may be considered: wind conditions, launch angle, heel/toe properties, side spin, accuracy relative to an axis, distance accuracy, face mapping, and the like. Thus, for example, a number of golf clubs may be identified for use by the player, such as a wood golf club driver for use in still air conditions, a wood golf club driver for use in headwinds, a wood golf club driver for use in tailwinds, and the like. - Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
Claims (35)
1. A hosel fitting for connecting a shaft to one of a plurality of club heads comprising:
a first portion of a tubular structure configured to be affixed to the end of the shaft;
a second portion of the tubular structure configured to be received by a bore in a club head, the second portion of the tubular portion extending downwardly into the bore;
a fastener receiving portion for receiving a fastener configured to affix the hosel fitting to any one of the plurality of club heads; and
wherein the bore, hosel fitting, and shaft are always substantially in line.
2. The hosel fitting of claim 1 , wherein the fastener receiving portion comprises a female-threaded fastener receiver configured to receive a male-threaded fastener.
3. The hosel fitting of claim 2 , wherein the male-threaded fastener comprises a bolt.
4. The hosel fitting of claim 1 , wherein the fastener receiving portion comprises a male-threaded fastener receiver configured to receive a female-threaded fastener.
5. The hosel fitting of claim 1 , wherein the second portion of the tubular structure is configured to extend downwardly into the bore until it contacts a base of the bore.
6. A golf club assembly, comprising:
a fastener;
a club head comprising a bore;
a shaft; and
a hosel fitting for connecting the shaft to the club head, the hosel fitting having:
a first portion of a tubular structure configured to be affixed to the end of the shaft;
a second portion of the tubular structure configured to be received by the bore in the club head, the second portion of the tubular portion extending downwardly into the bore;
a fastener receiving portion for receiving the fastener, the fastener configured to affix the hosel fitting the club head, wherein the bore, hosel fitting, and shaft are always substantially in line.
7. The golf club assembly of claim 6 , wherein the fastener receiving portion comprises a female-threaded fastener receiver, and wherein the fastener is a male-threaded fastener.
8. The golf club assembly of claim 7 , wherein the male-threaded fastener comprises a bolt.
9. The golf club assembly of claim 6 , wherein the fastener receiving portion comprises a male-threaded fastener receiver, and wherein the fastener comprises a female-threaded fastener.
10. The golf club assembly of claim 6 , wherein the bore comprises a base, and wherein the second portion of the tubular structure is configured to extend downwardly into the bore until it contacts the base of the bore.
11. The golf club assembly of claim 10 , wherein the bore further comprises an aperture in the base, wherein the fastener is configured to extend through the aperture to mate with the fastener receiving portion.
12. The golf club assembly of claim 6 , wherein the bore is configured to orient the shaft properly when the shaft is connected to the club head using the hosel fitting.
13. The golf club assembly of claim 6 , wherein the fastener is configured to allow the club head to be exchange with a differnet club head.
14. The golf club assembly of claim 13 , wherein the different club head comprises a different center of gravity relative to the first club head.
15. The golf cub assembly, wherein the fastener allows the shaft to be exchange with a different shaft.
16. The golf club assembly of claim 6 , wherein the club head comprises a recess substantially below the bore, the recess configured so that the fastener will not strike the ground when the golf club assembly is swung.
17. The golf club assembly of claim 6 , wherein the golf club head is a wood type golf club head.
18. The golf club assembly of claim 6 , wherein the golf club head is an iron type golf club head.
19. The golf club assembly of claim 6 , wherein the golf club head is a hybrid type golf club head.
20. A system for fitting a golfer fro a golf club, comprising:
at least one club head comprising a bore;
a fastener; and
at least one shaft assembly comprising a shaft and a hosel fitting, the hosel fitting comprising:
a first portion of a tubular structure configured to be affixed to the end of the shaft;
a second portion of the tubular structure configured to be received by the bore in the club head, the second portion of the tubular portion extending downwardly into the bore;
a fastener receiving portion for receiving the fastener, the fastener configured to affix the hosel fitting club head, wherein the bore, hosel fitting, and shaft are always substantially in line.
21. The system of claim 20 , wherein the fastener receiving portion comprises a female-threaded fastener receiver, and wherein the fastener is a male-threaded fastener.
22. The system of claim 21 , wherein the male-threaded fastener comprises a bolt.
23. The system of claim 20 , wherein the fastener receiving portion comprises a male-threaded fastener receiver, and wherein the fastener comprises a female-threaded fastener.
24. The system of claim 20 , wherein the bore comprises a base, and wherein the second portion of the tubular structure is configured to extend downwardly into the bore until it contacts the base of the bore.
25. The system of claim 24 , wherein the bore further comprises an aperture in the base, wherein the fastener is configured to extend through the aperture to mate with the fastener receiving portion.
26. The system of claim 20 , wherein the bore is configured to orient the shaft properly when the shaft assembly is connected to the club head.
27. The system of claim 20 , further comprising a plurality of club heads, each of the plurality of club heads comprising a bore.
28. The system of claim 27 , wherein the fastener is configured to allow the club head to be exchange with a differnet one of the plurality of club heads.
29. The system of claim 28 , wherein the different club head comprises a different center of gravity relative to the first club head.
30. The system of claim 20 , further comprising a plurality of shaft assemblies.
31. The system of claim 30 , wherein the fastener allows the shaft assembly to be exchange with a different one of the plurality of shaft assemblies.
32. The system of claim 20 , wherein the club head comprises a recess substantially below the bore, the recess configured so that the fastener will not strike the ground when the shaft assembly is connected with the club head.
33. The system of claim 20 , wherein the golf club head is a wood type golf club head.
34. The system of claim 20 , wherein the golf club head is an iron type golf club head.
35. The system of claim 20 , wherein the golf club head is a hybrid type golf club head
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US11/614,156 US20070155529A1 (en) | 2002-01-18 | 2006-12-21 | Quick disconnect system for coupling a golf club head with a golf club shaft |
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Also Published As
Publication number | Publication date |
---|---|
US20050085311A1 (en) | 2005-04-21 |
US20140378238A1 (en) | 2014-12-25 |
TW200303777A (en) | 2003-09-16 |
JP2005515046A (en) | 2005-05-26 |
US20050085309A1 (en) | 2005-04-21 |
US20030148818A1 (en) | 2003-08-07 |
WO2003061773A1 (en) | 2003-07-31 |
KR20040101208A (en) | 2004-12-02 |
EP1476227A4 (en) | 2008-04-16 |
US7166035B2 (en) | 2007-01-23 |
EP1476227A1 (en) | 2004-11-17 |
US20050079932A1 (en) | 2005-04-14 |
US8827842B2 (en) | 2014-09-09 |
CA2473659A1 (en) | 2003-07-31 |
TWI227676B (en) | 2005-02-11 |
US7159451B2 (en) | 2007-01-09 |
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