Abstract:
A titanium bodied driver that utilizes a lightweight receiving back cap, which is designed to be non-removable from the club head but can be loosened to allow its interior to be accessed to reposition one or more movable weights into alternative receiving locations, is disclosed herein. The back cap may also be designed to be completely removable from the driver body to gain access to the one or more weights that can be re-positioned in alternative receiving areas within the back cap&#39;s interior.

Description:
CROSS REFERENCES TO RELATED APPLICATIONS 
       [0001]    The present application is a continuation of U.S. patent application Ser. No. 13/220,408, filed on Aug. 29, 2011, which claims priority to U.S. Provisional Patent Application No. 61/382,430, filed on Sep. 13, 2010. 
     
    
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
       [0002]    Not Applicable 
       BACKGROUND OF THE INVENTION 
       [0003]    1. Field of the Invention 
         [0004]    The present invention relates to a golf club head having a movable back weight configuration. More specifically, the present invention relates to a titanium driver with a lightweight receiving back cap designed to be loosened to allow access to an interior, repositionable weight. 
         [0005]    2. Description of the Related Art 
         [0006]    Technical innovation in the configuration, material, construction and performance of golf clubs has resulted in a variety of new products. The advent of metals as a structural material has largely replaced natural wood for wood-type golf club heads, and is but one example of this technical innovation resulting in a major change in the golf industry. 
         [0007]    Titanium drivers have been used by golfers for over a decade. They represent the vast majority of the drivers produced and used around the world. Callaway Golf Company&#39;s second and third generation titanium driver body styles (Hawkeye ‘99 and Hawkeye VFT ‘01) each used a secondary metal for weighting, tungsten and bismuth respectively. The tungsten was externally visible, while the bismuth was not. Callaway has not used dissimilar metal for weighting purposes on its titanium bodied drivers for several years, but has welded titanium pieces or used thicker, as-cast, weighting regions or varying wall thicknesses to accomplish weight placement. While this type of weighting is useful for performance, it does not provide strong talking points or visual cues to describe or illustrate performance intentions. 
         [0008]    Although the prior art discloses many variations of golf club heads, the prior art fails to provide a club head with a high-performance weighting configuration with visual cues to describe or illustrate performance intentions. 
       BRIEF SUMMARY OF THE INVENTION 
       [0009]    The inventors have found that, by incorporating certain design features into a driver design, a golfer may have an improved driver that is better suited to his or her needs, abilities, and preferences to hit better shots and have a unique method of interfacing with a movable weight of the driver head. 
         [0010]    One such design feature is a moveable weight used to affect the position of the club head&#39;s center of gravity to provide ball trajectories that are better suited to the golfer&#39;s swing. Another design feature is the omission of welding operations from the driver and, as a result, eliminating the cost associated with purchasing secondary parts (faceplates, crown plates, sole plates, etc.) and the secondary operations (fixturing, grinding, blending, etc.) used to finish the club head. A further design feature is a affixing a moveable weight to a golf club head by housing it into a removable or captive, yet movable, back cap. Yet another design feature is the use of a lightweight material for the back cap, such as magnesium, composite graphite, aluminum, or plastic to minimize the mass of the back cap to provide more available mass for the movable weight. 
         [0011]    One aspect of the present invention is a club head comprising a body comprising a face component and an aft body, wherein the body is integrally cast from a metal material, and wherein the aft body has an opening, a gasket covering the opening, a back cap having an interior surface, wherein the back cap is slidably affixed to the gasket, and at least one removable weight positioned on the interior surface of the back cap. In a further embodiment, the body may have a volume of approximately 440 to 480 cubic centimeters and a weight of 180 to 210 grams. In another embodiment, the interior surface of the back cap may have a plurality of predefined weight receiving locations, such as on a heel side and a toe side of the back cap. In another embodiment, the golf club head further comprises a screw, wherein the at least one removable weight is semi-permanently fastened to the interior surface of the back cap with the screw. In yet another embodiment of the present invention, the golf club head further comprises a plurality of screws, wherein the gasket is permanently affixed to the aft body with an adhesive, and wherein the back cap is semi-permanently affixed to the gasket with the plurality of screws. 
         [0012]    In another further embodiment, the gasket and the back cap are each composed of a lightweight material, which may be selected from the group consisting of composite and aluminum, and the at least one removable weight is composed of a heavy material, which may be selected from the group consisting of stainless steel, titanium alloy, and tungsten alloy, having a density greater than the density of the lightweight material. In yet another further embodiment, the body is integrally cast from titanium alloy. In another embodiment, the aft body comprises a crown portion and a sole portion, and the opening is located in the sole portion. 
         [0013]    The golf club head of the present invention may further comprise a slider tee comprising an end portion and a head portion, wherein the gasket comprises an elongated slot, wherein the back cap comprises a socket, wherein the end portion of the slider tee is threaded through the slot and fixed in the socket, and wherein the head portion of the slider tee is sized to prevent the slider tee from disengaging from the slot. The slider tee may be composed of a lightweight material selected from the group consisting of composite, aluminum alloy, magnesium, and plastic, and may permit the back cap to slide along a length of the elongated slot. The back cap may slide on a linear, rotational, or curved path along the length of the elongated slot. 
         [0014]    Another aspect of the present invention is a driver-type golf club head comprising a body having a rearwardly located opening, wherein the body is composed of a titanium material, and wherein the body has a volume of approximately 440 to 480 cubic centimeters and a weight of 180 to 210 grams, a movable assembly covering the opening, and at least one weight member removably secured within the movable assembly, wherein the at least one weight member is composed of a high density metal material, and wherein the golf club head has no welding in its construction. In a further embodiment of the present invention, the movable assembly comprises a gasket and a back cap, and may further comprise a slider tee, wherein the gasket is composed of an aluminum material, wherein the gasket is affixed to the body with adhesive, wherein the slider tee movably connects the back cap to the gasket, and wherein the back cap is composed of a composite material. The at least one weight member may be composed of a metal material selected from the group consisting of stainless steel, titanium alloy, and tungsten alloy, and the body of the driver-type golf club head may be integrally cast. 
         [0015]    Yet another aspect of the present invention is a driver-type golf club head comprising a body comprising a crown portion composed of a composite material, a face portion composed of a titanium alloy, and a sole portion composed of a titanium alloy, wherein the sole portion comprises a rearwardly located opening, and wherein the face portion and the sole portion are integrally cast, a gasket covering the opening, wherein the gasket is permanently affixed to the body with an adhesive material, and wherein the gasket is composed of an aluminum alloy, a slider tee, a back cap having an interior surface, wherein the back cap is slidably affixed to the gasket with the slider tee, at least one screw, and at least one removable weight secured to the interior surface of the back cap with the screw, wherein the golf club head has no welding in its construction, and wherein the body has a volume of approximately 440 to 480 cubic centimeters and a weight of 180 to 210 grams. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0016]      FIG. 1  is an exploded, rear, heel-side view of a golf club head according to an embodiment of the present invention. 
           [0017]      FIG. 2  is an exploded, rear, toe-side view of the golf club head shown in  FIG. 1 . 
           [0018]      FIG. 3  is an exploded, toe-side view of the golf club head shown in  FIG. 1 . 
           [0019]      FIG. 4  is an interior, perspective view of the back cap and weight shown in  FIG. 1  in an assembled configuration according to one embodiment of the present invention. 
           [0020]      FIG. 5  is an interior, perspective view of a back cap and weight shown in  FIG. 1  in an assembled configuration according to another embodiment of the present invention. 
           [0021]      FIG. 6  is a front, perspective view of the gasket and the back cap shown in  FIG. 1  in an assembled configuration. 
           [0022]      FIG. 7  is a top, perspective view of the gasket and the back cap shown in  FIG. 6 . 
           [0023]      FIG. 8  is a rear, perspective view of the gasket and the back cap shown in  FIG. 6 . 
           [0024]      FIG. 9  is a top, plan view of the golf club head shown in  FIG. 1  in a fully assembled configuration, with the back cap slid towards the toe to reveal a weight. 
           [0025]      FIG. 10  is a bottom, perspective view of the assembled golf club head shown in  FIG. 9 . 
           [0026]      FIG. 11  is a top, plan view of the assembled golf club head according to another embodiment of the present invention, with the back cap slid towards the heel to reveal a weight. 
           [0027]      FIG. 12  is a rear, perspective view of the assembled golf club head shown in  FIG. 1 . 
           [0028]      FIG. 13  is a heel, plan view of the golf club head shown in  FIG. 12 , 
           [0029]      FIG. 14  is a bottom, plan view of the assembled golf club head shown in  FIG. 12 . 
           [0030]      FIG. 15  is a rear, plan view of the golf club head shown in  FIG. 12 . 
           [0031]      FIG. 16  is a rear, perspective view of the golf club head shown in FIG,  12 . 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0032]    The present invention is generally directed to a golf club head with a novel, movable weight configuration that allows a golfer to affect the position of the center of gravity in the club head to provide bail trajectories that are better suited to the golfer&#39;s swing. The movable weight may be housed in a removable back cap or a captive but movable back cap. The present invention is also directed to a golf club head created without welding operations, winch reduces or eliminates the cost associated with purchasing secondary parts (faceplates, crown plates, sole plates, etc.) and the secondary operations (fixturing, grinding, blending, etc.) used to finish the club head. 
         [0033]    Exploded views of the preferred embodiment of the present invention are shown in  FIGS. 1-3 . The golf club head  40  shown in FIGS,  1 - 3  has a hollow interior and is generally composed of a body  42  having a face  60 , an aft body  70  comprising a crown  62  and a sole  64 , and a hosel  50 , aback cap  80 , a gasket  90 , screws  100 ,  101 ,  102 ,  103 , a movable weight  120 , and a slider tee  130 . The club head body  42  also may optionally have a ribbon, skirt, or side portion (not shown) disposed between the crown  62  and sole  64  portions. The golf club head body  42  is preferably partitioned into a heel section  66  nearest the hosel  50 , a toe section  68  opposite the heel section  66 , and a rear section  75  opposite the face component  60 . The embodiment of the golf club head  40  shown in  FIGS. 1-16  has a volume of at 300 to 500 cubic centimeters, more preferably a volume of 440 to 480 cubic centimeters, and most preferably a volume of 450 to 470 cubic centimeters, a mass of 160 to 225 grams, and most preferably a mass of 180 to 215 grams, and a face  60  with a characteristic time that is close to, hut does not exceed, 257 μs. 
         [0034]    In the preferred embodiment shown in  FIGS. 1-3 , the face  60 , aft body  70 , and hosel  50  are made of titanium. The surfaces of titanium investment castings are generally contaminated with oxygen due to a reaction with the oxide mold material, a ceramic shell system. This contamination creates a brittle surface layer called α-case, which must be removed or the titanium will be subject to cracking and failure during use. The shell system of the present invention retards the formation of α-case on the surface of the titanium. In particular, the golf club head body  42  of the present invention is designed as a one-piece casting that does not require any secondary operation(s) to affix the face  60 , sole  64 , or crown plate  62  to the body  42 . The club head body  42  of the present invention has all these portions integrally cast together in one complete unit. 
         [0035]    An opening  110  in the aft portion  70  of the club head, shown in  FIGS. 1 and 2 , is large enough to extract all the internal core pieces of the molding tool after casting. This opening is then covered by a gasket  90 , which fits between the titanium body  42  and a lightweight back cap  80 . The integral casting method allows for better sound, strength, and thickness control because it eliminates the seam created by a welding operation, which adds weld material that must then be ground away. Welding operations add cost due to the process, consumable materials, fixturing, and finishing. The preferred driver of the present invention is not subject to such secondary welding and finishing operations. 
         [0036]    In other embodiments, the face  60 , aft body  70 , and hosel  50  may be made from cast, machined, or forged metals or from composite materials, and may be formed integrally or pieced together. In yet other embodiments, the face  60 , aft body  70 , and hosel  50  may each be composed of different materials. For example, the face  60  may be made of cast titanium alloy and the crown  62  may be made of a composite material. The golf club of the present invention may also have material compositions such as those disclosed in U.S. Pat. Nos. 6,244,976, 6,332,847, 6,386,990, 6,406,378, 6,440,008, 6,471,604, 6,491,592, 6,527,650, 6,565,452, 6,575,845, 6,478,692, 6,582,323, 6,508,978, 6,592,466, 6,602,149, 6,607,452, 6,612,398, 6,663,504, 6,669,578, 6,739,982, 6,758,763, 6,860,824, 6,994,637, 7,025,692, 7,070,517, 7,112,148, 7,118,493, 7,121,957, 7,125,344, 7,128,661, 7,163,470, 7,226,366, 7,252,600, 7,258,631, 7,314,418, 7,320,646, 7,387,577, 7,396,296, 7,402,112, 7,407,448, 7,413,520, 7,431,667, 7,438,647, 7,455,598, 7,476,161, 7,491,134, 7,497,787, 7,549,935, 7,578,751, 7,717,807, 7,749,096, land 7,749,097, the disclosure of each of which is hereby incorporated in its entirety herein. 
         [0037]    In the preferred embodiment shown in  FIGS. 1 -3 , the back cap  80  is composed of a composite material. In another embodiment, the back cap  80  is composed of magnesium or magnesium alloy. In other embodiments, the back cap  80  of the present invention may be made from another, very lightweight material, such as aluminum or plastic, to minimize the mass of the back cap and provide more available mass for the movable weight  120 . The back cap  80  of the present invention may, in other embodiments, be made of a material with a density less than that of the remainder of the golf club head  40 , including the face  60 , aft body  70 , hosel  50 , and weight  120 . 
         [0038]    As shown in more detail in  FIGS. 4 and 5 , the back cap  80  holds a weight  120  having a weight of 1 to 50 grams, more preferably 1 to 30 grams, and most preferably a weight of approximately 5 to 20 grams in a desired location. The weight  120  is preferably composed of a material having a higher density than the material used to make the gasket  90  and the back cap  80 , including, but not limited to, stainless steel, titanium alloy, and tungsten alloy. 
         [0039]    In the embodiment depicted in  FIGS. 4 ,  9 , and  10 , the weight  120  is attached to an interior surface  85  of the back cap  80  with a screw  100  on the side of the back cap  80  closest to the toe section  68  to result in a neutrally weighted club head  40 . In the embodiment depicted in FIGS,  5 ,  11 , and  12 , the weight  120  is attached to an interior surface  85  of the back cap  80  with a screw  100  on the side of the back cap  80  closest to the heel section  66  to result in a draw weighted club head  40 . These two positions affect a different sidespin to the ball which for some golfers will improve the ball flight of the golf ball for greater distance and directional control. The weight  120  may be removably attached to the back cap  80  by means other than a screw  100  including, but not limited to, removable adhesive or snap-in features. The presence in the back cap  80  of a receptacle, or visually observable features, for receiving the weight  120  or a screw  100  for affixing the weight  120  to the back cap  80  constitutes a predefined weight-receiving location. 
         [0040]    Table 1 shows mechanical properties and data related to a neutrally-weighted driver designed according to the present invention, while Table 2 shows mechanical properties and data related to a draw-weighted driver designed according to the present invention. These tables demonstrate that the location of the weight  120  within the back cap  80  can affect the center of gravity and inertia value of a golf club head  40 , among other things. 
         [0000]    
       
         
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
               
               
             
           
               
                   
                 TABLE 1 
               
               
                   
                   
               
             
             
               
                   
                 Impact Loft: 
                 11.000 
               
               
                   
                 Design Loft: 
                 11.000 
               
               
                   
                 Lie: 
                 0.000 
               
               
                   
                 Bulge: 
                 12.000 
               
               
                   
                 Roll: 
                 10.004 
               
               
                   
                 Face Angle: 
                 0.000 
               
               
                   
                 F1: 
                 3.225 
               
               
                   
                 Total Mass: 
                 198.038 
               
               
                   
                   
               
             
          
           
               
                 Head Frame Mass Properties: 
               
             
          
           
               
                   
                 CGX, CGY, CGZ: 
                 0.7483, 0.7982, 1.1275 
               
               
                   
                 IXX, IYY, IZZ: 
                 2829.59, 2635.67, 4092.70 
               
               
                   
                 IXY, IXZ, IYZ: 
                 393.50, −73.80, −109.64 
               
             
          
           
               
                 Hosel Frame Mass Properties: 
               
             
          
           
               
                   
                 CGX, CGY, CGZ: 
                 0.7483, 1.2922, −2.7366 
               
               
                   
                 IXX, IYY, IZZ: 
                 2829.59, 3192.93, 3535.44 
               
               
                   
                 IXY, IXZ, IYZ: 
                 284.95, −281.23, −716.54 
               
             
          
           
               
                 Impact Frame Mass Properties: 
               
             
          
           
               
                   
                 CGX, CGY, CGZ: 
                 1.3480, −0.0090, 0.1431 
               
               
                   
                 IXX, IYY, IZZ: 
                 2847.93, 2635.67, 4074.36 
               
               
                   
                 IXY, IXZ, IYZ: 
                 407.19, 168.15, −32.54 
               
               
                   
                 Impact Center X, Y, Z: 
                 −0.6023, 0.8072, 1.2443 
               
               
                   
                 Bulge Roll Apex X, Y, Z: 
                 −0.6023, 0.8072, 1.2443 
               
               
                   
                   
               
             
          
           
               
                 Component Weight Breakdown: 
               
             
          
           
               
                   
                 Solid Name 
                 Weight (g) 
                 Density (g/in 3 ) 
                 Layer 
               
               
                   
                   
               
               
                   
                 1- 
                 164.80 
                 72.400 
                 100 
               
               
                   
                 2- 
                 13.13 
                 29.500 
                 91 
               
               
                   
                 3- 
                 8.99 
                 127.000 
                 91 
               
               
                   
                 4- 
                 6.35 
                 23.100 
                 92 
               
               
                   
                 5- 
                 1.07 
                 127.000 
                 91 
               
               
                   
                 6- 
                 1.07 
                 127.000 
                 91 
               
               
                   
                 7- 
                 1.07 
                 127.000 
                 91 
               
               
                   
                 8- 
                 1.07 
                 127.000 
                 91 
               
               
                   
                 9- 
                 0.59 
                 23.100 
                 88 
               
               
                   
                   
               
             
          
         
       
     
         [0000]    
       
         
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
               
               
             
           
               
                   
                 TABLE 2 
               
               
                   
                   
               
             
             
               
                   
                 Impact Loft: 
                 11.000 
               
               
                   
                 Design Loft: 
                 11.000 
               
               
                   
                 Lie: 
                 0.000 
               
               
                   
                 Bulge: 
                 12.000 
               
               
                   
                 Roll: 
                 10.004 
               
               
                   
                 Face Angle: 
                 0.000 
               
               
                   
                 F1: 
                 3.225 
               
               
                   
                 Total Mass: 
                 198.039 
               
               
                   
                   
               
             
          
           
               
                 Head Frame Mass Properties: 
               
             
          
           
               
                   
                 CGX, CGY, CGZ: 
                 0.7483, 0.6696, 1.1274 
               
               
                   
                 IXX, IYY, IZZ: 
                 2772.49, 2635.88, 4035.61 
               
               
                   
                 IXY, IXZ, IYZ: 
                 127.37, −74.03, −61.12 
               
             
          
           
               
                 Hosel Frame Mass Properties: 
               
             
          
           
               
                   
                 CGX, CGY, CGZ: 
                 0.7483, 1.1856, −2.6648 
               
               
                   
                 IXX, IYY, IZZ: 
                 2772.49, 3130.24, 3541.25 
               
               
                   
                 IXY, IXZ, IYZ: 
                 64.19, −132.60, −671.80 
               
             
          
           
               
                 Impact Frame Mass Properties: 
               
             
          
           
               
                   
                 CGX, CGY, CGZ: 
                 1.3480, −0.1375, 0.1430 
               
               
                   
                 IXX, IYY, IZZ: 
                 2790.74, 2635.88, 4017.35 
               
               
                   
                 IXY, IXZ, IYZ: 
                 136.69, 167.94, −35.69 
               
               
                   
                 Impact Center X, Y, Z: 
                 −0.6023, 0.8072, 1.2443 
               
               
                   
                 Bulge Roll Apex X, Y, Z: 
                 −0.6023, 0.8072, 1.2443 
               
               
                   
                   
               
             
          
           
               
                 Component Weight Breakdown: 
               
             
          
           
               
                   
                 Solid Name 
                 Weight (g) 
                 Density (g/in 3 ) 
                 Layer 
               
               
                   
                   
               
               
                   
                 1- 
                 164.80 
                 72.400 
                 100 
               
               
                   
                 2- 
                 13.13 
                 29.500 
                 91 
               
               
                   
                 3- 
                 8.99 
                 127.000 
                 91 
               
               
                   
                 4- 
                 6.35 
                 23.100 
                 92 
               
               
                   
                 5- 
                 1.07 
                 127.000 
                 91 
               
               
                   
                 6- 
                 1.07 
                 127.000 
                 91 
               
               
                   
                 7- 
                 1.07 
                 127.000 
                 91 
               
               
                   
                 8- 
                 1.07 
                 127.000 
                 91 
               
               
                   
                 9- 
                 0.59 
                 23.100 
                 88 
               
               
                   
                   
               
             
          
         
       
     
         [0041]    Though the preferred embodiment of the back cap  80  shown in  FIGS. 4 and 5  provides only two locations for the weight  120 , the back cap  80  in other embodiments may have more than two different locations to which the weight  120  may be affixed or otherwise placed such that a golfer can move the center of gravity (CG) of the golf club head  40  upwards and downwards in addition to toe-wards and heel-wards. The golf club  40  of the present invention may also include more than one weight  120 . 
         [0042]    As shown in more detail in  FIGS. 6-8 , the gasket  90  is fixed to the back cap  80  with screws  101 ,  102 ,  103 . The gasket  90  of the preferred embodiment is made of aluminum. In other embodiments, the gasket  90  may be composed of another lightweight material, including, but not limited to, magnesium, magnesium alloy, plastic, or composite graphite. As shown in  FIGS. 1-3 , the gasket  90  covers the opening  110  in the aft portion  70  of the club head. The gasket  90  is glued and/or mechanically fastened over the opening  110 , which allows the back cap  80  to be more precisely fastened to the club head  40 . In the preferred embodiment depicted in  FIGS. 1-16 , the golf club head body  42  is hollow, and the gasket  90  prevents foreign objects from entering the hollow interior of the body  42 . 
         [0043]    The gasket  90  also separates the golf club head  40  body from the material of the back cap  80 . This separation prevents an electrochemical process called galvanic corrosion, which occurs when reactive materials in the presence of an electrolyte (e.g., water) come into contact with one another. In the preferred embodiment, where the body  42  is made of titanium, the gasket  90  is made of aluminum, and the back cap  80  is made of a lightweight material, the separation between the body  42  and back cap  80  is desirable, particularly if the back cap  80  is made of a metal material. The body  42 , gasket  90 , and lightweight back cap  80  of the preferred embodiment of the present invention are also coated with a material to insulate them from inadvertent contact with reactive materials. In other embodiments, the body  42 , gasket  90 , and/or lightweight back cap  80  may or may not be coated, 
         [0044]    In the preferred embodiment, a slider tee  130  mechanism allows the back cap  80  to move along the gasket  90  to give a golfer access to the repositionable weight  120 , which can be relocated into receptive areas within the interior of the back cap  80 . The slider tee  130  may be made from one or more lightweight materials, including, but not limited to, aluminum, aluminum alloy, magnesium, composite, and plastic. As shown in  FIGS. 1-5 , the end portion  132  of the slider tee  130 , which in the preferred embodiment is made of aluminum, is threaded through a slot  140  in the gasket  90  and inserted into a socket  135  in the back cap  80 . The end portion  132  of the slider tee  130  maybe permanently or removably secured within the socket  135  by any means, but preferably by an adhesive. The head portion  134  of the slider tee  130 , shown in  FIGS. 1-7 , prevents the slider tee  130  from slipping through the slot  140 . The slot  140  permits the slider tee  130 , and thus the back cap  80 , to slide laterally along the gasket  90 . In other embodiments, the slot  140  may permit the back cap  80  to slide up and down in addition to, or instead of, side to side, 
         [0045]    Removal of the screws  101 ,  102 ,  103  loosens the back cap  80  from the golf club head  40  and gasket  90 .  FIGS. 9-10  show a neutrally-weighted embodiment of the present invention without the screws  101 ,  102 ,  103 . In this embodiment, the back cap  80  has been slid along the slot  140  of the gasket  90  in the direction of the toe section  68  to reveal the weight  120 .  FIGS. 11-12  show a draw-weighted embodiment of the present invention without the screws  101 ,  102 ,  103 . In this embodiment, the back cap  80  has been slid along the slot  140  of the gasket  90  in the direction of the heel section  66  to reveal the weight  120 . In each of these embodiments, once the weight  120  has been relocated, the back cap  80  can be slid back into a closed position that is fully flush with the gasket  90  and the screws  101 ,  102 ,  103  can be replaced, 
         [0046]    In the embodiments shown in  FIGS. 1-16 , the screws  100 ,  101 ,  102 ,  103  used to affix the weight  120  to the back cap  80  and the gasket  90  to the back cap  80  are composed of stainless steel. In other embodiments, the screws  100 ,  101 ,  102 ,  103  maybe composed of another material, including a metal, a composite, or a plastic.  FIGS. 13-16  show the preferred embodiment of the invention in its fully assembled form. 
         [0047]    In an alternative embodiment, the back cap  80  is not movably affixed to the golf club head  40  via a slider tee  130  attached to a gasket  90 , but instead is completely removable. In this embodiment, a golfer or fitting professional can detach the back cap  80  from the golf club head  40  by removing all of the screws  101 ,  102 ,  103  and alter the location of the weight  120  within the back cap  80 . After such modification is completed, the back cap  80  can be re-attached to the golf club head  40 , 
         [0048]    The golf club head of the present invention may be constructed to take various shapes, including traditional, square, rectangular, or triangular. In some embodiments, the golf club head of the present invention takes shapes such as those disclosed in U.S. Pat. Nos. 7,163,468, 7,166,038, 7,169,060, 7,278,927, 7,291,075, 7,306,527, 7,311,613, 7,390,269, 7,407,448, 7,410,428, 7,413,520, 7,413,519, 7,419,440, 7,455,598, 7,476,161, 7,494,424, 7,578,751, 7,588,501, 7,591,737, and  7 , 749 , 096 , the disclosure of each of which is hereby incorporated in its entirety herein. 
         [0049]    The golf club head of the present invention may also have variable face thickness, such as the thickness patterns disclosed in U.S. Pat. Nos. 5,163,682, 5,318,300, 5,474,296, 5,830,084, 5,971,868, 6,007,432, 6,338,683, 6,354,962, 6,368,234, 6,398,666, 6,413,169, 6,428,426, 6,435,977, 6,623,377, 6,997,821, 7,014,570, 7,101,289, 7,137,907, 7,144,334, 7,258,626, 7,422,528, 7,448,960, 7,713,140, the disclosure of each of which is incorporated in its entirety herein. The golf club of the present invention may also have the variable face thickness patterns disclosed in U.S. Patent Application Publication No. 20100178997, the disclosure of which is incorporated in its entirety herein. 
         [0050]    From the foregoing it is believed that those skilled in the pertinent art will recognize the meritorious advancement of this invention and will readily understand that while the present invention has been described in association with a preferred embodiment thereof, and other embodiments illustrated in the accompanying drawings, numerous changes, modifications and substitutions of equivalents may be made therein without departing from the spirit and scope of this invention which is intended to be unlimited by the foregoing except as may appear in the following appended claims. Therefore, the embodiments of the invention in which an exclusive property or privilege is claimed are defined in the following appended claims.