the present invention is directed to a quick release connection system for assembling and disassembling golf clubs . such a system can be utilized or customized for various applications , including , but not limited , to the shaft - club head connection , the insertion of adjustable weights in the club head , and the connection of a sole plate to the club head . several embodiments of the present invention are described below . in one embodiment , the present invention is directed to a quick release connection system for connecting a golf club shaft to a club head . the quick release connection system comprises a golf club shaft and a hosel of a golf club head with an opening sized and dimensioned to receive the shaft . preferably , the hosel opening comprises a frame surrounding an open area and a plurality of angularly disposed teeth that extend from a frame into the open area , so that when a shaft is inserted , contact is made between the teeth and the shaft . the teeth are angled toward the sole or heel of the club , such that they do not obstruct the insertion of the shaft into the hosel opening , but may give or bend as the shaft passes through . the teeth form an acute angle with the direction of insertion , e . g ., the angle between the shaft and the teeth that faces toward the opening of the hole is less than 90 degrees . the teeth are preferably arranged in a ring , but are not limited to any singular arrangement . when the shaft is removed by pulling it from the club head , the teeth will bite into the outside of the shaft and prevent its removal . in order to remove the shaft , a release tool is attached around the shaft and pushes against a cylindrical release collar slidingly connected to the shaft or the hosel . when pressed by the release tool on the outer end , the release collar pushes the teeth away from the shaft . once this contact is broken , the shaft can be removed . alternatively , the release tool is sized and dimensioned to directly push or pull the teeth away from the shaft . additionally , the interior of the connection system can be sealed off at one end by a shaft stopper . an optional brace plug may also extend from the shaft stopper to fit within the end of the shaft to provide additional mechanical support . in order to prevent the shaft from rotating within the frame of the connection system , one or more interlock devices may be disposed on or within the connection system , i . e ., on the frame , shaft stopper , brace plug , shaft , or any combination thereof . suitable anti - rotational devices include keyway or key / spline systems . extra row ( s ) of teeth may also strengthen the connection between the shaft and the connection system , helping to hold the shaft in place . another suitable method for strengthening this connection is to optionally score a line or ring on the golf club shaft to secure the teeth on the scored line . this embodiment and other embodiments , including but not limited to connection systems for adding removable weights or sole plates to the club head , are described in detail below . fig1 shows an exemplary embodiment of the present invention applied to a golf club 40 . a frame portion of the connection system , not shown , is disposed or integrated within hosel 38 of golf club head 42 . shaft 12 is inserted into the frame within hosel 38 , passing through release collar 22 , which is slidingly connected to the frame and around shaft 12 , and protrudes out from within hosel 38 . optional scored line 19 is cut out of shaft 12 to facilitate attachment to the frame . the optional scored line 19 can be a gap between the end of shaft 12 and the top of plug 18 . to release shaft 12 , release tool 24 is placed around shaft 12 and pushed against release collar 22 , as described above and in more detail below . fig2 and 2 a illustrate the quick release connection system 10 according to the present invention . shaft 12 is inserted in the opening 30 of frame 14 . as shaft 12 passes inside frame 14 at proximal end 15 , it contacts teeth 16 , but its movement is not obstructed because teeth 16 are mounted angularly relative to a longitudinal axis of frame 14 and shaft 12 , and toward distal end 17 . distal end 17 is disposed proximate to the heel of club head 42 . to ease insertion into opening 30 , shaft 12 may be tapered at the insertion end . shaft 12 can be pushed around optional brace plug 18 all the way up to contact with shaft stopper 20 . optional brace plug 18 stabilizes shaft 12 within frame 14 . at least one shaft interlock system may align and lock shaft 12 to frame 14 to minimize any relative rotation between shaft 12 and the frame 14 . suitable interlock systems include , but are not limited to , key and spline systems oriented along the shaft axis . to remove shaft 12 from frame 14 , release tool 24 is preferably used in conjunction with release collar 22 , which is slidingly attached to frame 14 or is an extension of frame 14 . release tool 24 is placed around shaft 12 and is moved distally along arrows 1 until it comes in contact with release collar 22 . as release tool 24 is moved further distally along arrows 1 , release collar 22 is moved in the same direction , contacting teeth 16 . teeth 16 are then moved radially outward away from shaft 12 . when teeth 16 are no longer in contact with shaft 12 , shaft 12 can be removed from connection system 10 . in order to prevent re - engagement between teeth 16 and shaft 12 , release tool 24 is pressed against release collar 22 during the removal of shaft 12 . preferably , release tool 24 has a u - shape so that it can be readily positioned around shaft 12 and removed therefrom , as shown in fig5 . in an alternative embodiment , release collar 22 is constructed to be wide enough around shaft 12 such that a person may be able to manually push in release collar 22 to disengage teeth 16 without the use of release tool 24 . for example , release collar 22 may include a lip or another user - actuated handle . yet another embodiment of the invention is directed at a quick release connection system for adjustable , removable weights that can be inserted into a golf club head , and is shown in fig3 . this embodiment is similar to the embodiment shown in fig1 , 2 , and 2 a , except that the shaft is replaced by a removable weight and the connection system comprises an insertion hole in the club head . sizes and materials of shaft , frame , and teeth , as recognized by those in the art , can vary according to the different force and strength requirements of the club head . in this embodiment , frame 14 is integrated within the body of golf club head 42 and is adapted to receive a removable weight 44 , which can be hollow or solid . connection system 10 is not limited to any one location within the body of club head 42 , and there can be multiple connection systems 10 integrated within a single club head 42 . placing removable weights in different locations within the club head allows golfers to adjust the trajectory of their shots by changing the center of gravity and the moment of inertia . for example , placing a heavy removable weight toward the bottom and rear of the club head moves the center of gravity in the same direction , permitting the golfer to hit a ball with a higher launch angle . this also increases the moment of inertia , increasing the size of the sweet spot and minimizing the chances that an off - center hit will result in a poor shot . similar to fig2 and 2 a , teeth 16 bite into the side of removable weight 44 once it has been inserted to prevent removal without release tool 24 . similar to previous embodiments , in order to remove the removable weight 44 , the release tool 24 is pushed against release collar 22 to disengage teeth 16 from contact with weight 44 . another embodiment of the present invention is similar to the embodiment shown in fig1 , 2 , 2 a , and 3 , except that connection system 10 is separate from and is removably disposed within a hosel or insertion hole of the golf club head , not integrated with the walls of the hosel or insertion hole . in this embodiment , a plurality of teeth may be disposed on the outside of frame 14 to connect connection system 10 to the inside of the hosel . fig4 shows a cross - sectional view of quick release connection system 10 according to this embodiment , separate from and being inserted into opening 50 . opening 50 may be an opening in a hosel , an insertion hole , or any other similar opening known in the art . this embodiment preferably uses teeth as seen in the previous embodiments to attach connection system 10 within opening 50 . connection system 10 may be inserted into opening 50 either before or after shaft 12 is inserted into connection system 10 . as shaft 12 passes inside frame 14 at proximal end 15 , it contacts teeth 16 , but its movement is not obstructed because teeth 16 are mounted angularly relative to a longitudinal axis of frame 14 and shaft 12 , and toward distal end 17 as described above . release collar 22 or an extension thereof is slidingly attached to frame 14 . in the insertion of connection system 10 , as frame 14 is pushed into opening 50 , mounting teeth 52 make contact with the walls 46 of opening 50 , but movement of the connection system is not obstructed because mounting teeth 52 are mounted angularly relative to a longitudinal axis of frame 14 and walls 46 . however , if one attempts to remove connection system 10 , mounting teeth 52 will bite into the walls of opening 50 and prevent removal in that direction . while shaft 12 may be removed by pushing a release tool ( not shown in fig4 ) against release collar 22 as in the embodiment shown in fig2 and 2 a , removal of the entire connection system 10 can only be accomplished using a different release tool , such as a pull ring instead of a push ring . this embodiment can also be applied to adjustable , removable weights disposed within the club head . in such an embodiment , shaft 12 is replaced by a removable weight 44 , and frame 14 is disposed inside an insertion hole 48 in the club head . as with the preceding embodiments , sizes and materials of the shaft , frame , and teeth , as recognized by those skilled in the art , can vary according to different force and strength requirements . in another embodiment of the present invention , as depicted in fig6 and 6 a , the quick connection system 110 is used to removably connect a soleplate 112 to a golf club head body 114 . soleplate 112 may be used to enhance the various performance characteristics of a golf club when attached to club head body 114 , such characteristics include , but are not limited to , increasing the moment of inertia and adjusting the center of gravity . soleplate 112 comprises a flat portion 117 and at least one inverse bore portion 118 . a plurality of teeth 120 is preferably angularly attached to each inverse bore portion 118 of soleplate 112 as shown . club head body 114 preferably comprises at least one bore shaft 116 , with each release collar 122 slidingly connected to a bore shaft 116 . each bore shaft 116 also comprises an optional scored line 119 which runs around at least a portion of the circumference of the bore shaft . to connect soleplate 112 to club head body 114 , each inverse bore portion 118 of soleplate 112 is placed over each bore shaft 116 in club head body 114 . as soleplate 112 is lowered over bore shaft ( s ) 116 , teeth 120 will make contact with the outside of bore shaft 116 . teeth 120 will contact , slide into , and engage with optional scored line 119 in bore shaft 116 , locking soleplate 112 and club head body 114 together . in accordance with the present invention , disassembly of soleplate 112 and club head body 114 is shown in fig7 . release tool 124 is inserted between the teeth 120 so that hooked portion 125 of tool 124 is below second scored line 123 of release collar 122 . fig8 is a top view of a portion of the connection system showing teeth 120 engaged with bore shaft 116 and open areas 150 between teeth 120 that tool 124 is inserted into . referring back to fig7 , once inserted between teeth 120 , release tool 124 is then pulled along arrow 101 . hooked portion 125 of tool 124 will engage with scored line 123 , and tool 124 is continually pulled until release collar 122 makes contact with teeth 120 and disengages teeth 120 from optional scored line 119 of bore shaft 116 . once teeth 120 are disengaged from and no longer in contact with scored line 119 , soleplate 112 can be removed from club head body 114 . while it is apparent that the illustrative embodiments of the invention disclosed herein fulfill the objectives stated above , it is appreciated that numerous modifications and other embodiments may be devised by those skilled in the art . therefore , it will be understood that the appended claims are intended to cover all such modifications and embodiments , which would come within the spirit and scope of the present invention .
the present invention is directed at a quick release connection system to facilitate customization of golf clubs . it can be used to interchange shafts , removable weights , or soleplates quickly and easily . teeth are disposed on the inside of a frame so that a shaft may be inserted with minimal resistance , but cannot be removed without specific steps which may require the use of a simple tool . strengthening and interlock devices are provided to ensure performance quality akin to traditional golf clubs .