Abstract: A ball striking device, such as a golf club, includes a head that includes a face having a ball striking surface configured for striking a ball and a body connected to the face and extending rearward from the face. A face member formed primarily of a metallic material forms the face, and a body member is connected to the face member and extends rearward from the face member to form at least a portion of the body. The body member is formed at least partially of a polymer material, and has a doped portion containing a doping material dispersed within the polymer material. The doping material may have a different density than the polymer material, such that the doped portion has a different density than the portions of the body member not containing the doping material. A co-molding method may be used to form the ball striking device.

Abstract: A putter-type golf club head has a main body and a face component including a first element formed of a resilient material. The putter-type golf club head also has a second element forward of the first element and including a rigid material. The second element is secured directly to the first element. The first element has a thickness that gradually increases toward a sole portion of the club head.

Abstract: A golf club head, preferably a putter head, comprising a replaceable face insert is disclosed herein. The golf club head comprises a body with face cavity and a secondary cavity in communication with, and disposed behind, the face cavity, and at least one opening extending through a top or sole portion into the secondary cavity. The replaceable face insert comprises a striking portion and a support structure extending from a rear surface of the striking portion. The support structure is received within the secondary cavity and the striking portion is received within the face cavity, and then a rod or bolt is inserted through the opening and through the support structure to reversibly secure the face insert to the body. A linear bearing may be disposed within the support structure to receive the rod or bolt.

Abstract: An adjustable interchangeable golf club with a faceplate-based platform to receive components for enhancing and controlling various aspects that control the golf ball flight and spin characteristics. Disclosed are components for adjusting loft and bounce angle, and interchangeable faceplate and rear flange styles. Novel milled surface roughness for enhanced spin control is disclosed along with new milling methods for achieving optimal surface roughness. Lightweight hosel and consequent redistribution of mass in club head greatly increases the inertia of the golf club. Centrally located hosel position aids in club head stability on off-center hits. This results in a golf club that hits the ball higher, straighter, longer, and with increased ball spin characteristics.

Abstract: Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a golf club head may include a body portion having an interior cavity, a port connected to the interior cavity, a toe portion, a heel portion, a top portion, a sole portion, a back portion, a port, and a front portion having a perimeter ledge portion defining at least a portion of an outer boundary of the front portion. The example golf club head may also include a face portion having a front surface with at least one groove and a back surface opposite the front surface and associated with a total back surface area. The back surface may include a first back surface region associated with a first back surface area and a second back surface region associated with a second back surface area. The total back surface area may equal to the sum of the first back surface area and the second back surface area.

Abstract: A golf putter alignment system has two alignment markers placed above the strike face of a putter head on the front top surface of the putter head. The alignment markers are centered about a midpoint that corresponds to the horizontal center of the strike face, with the distance between the centers of the alignment markers corresponding to the diameter of a golf ball. The alignment markers can be mounted on top of or integrally with the putter head to provide visual alignment markers on the front top surface. The alignment markers are formed from several materials with colors that contrast with the color of the front top surface.

Abstract: A hollow golf club head includes an inner surface and an outer surface, the golf club head further comprises a strike face operative to impact a golf ball, a body extending rearward from a perimeter of the strike face, and a flexure joint extending from the outer surface to the inner surface. The flexure joint includes a forward impact surface, a reaction surface in contact with the impact surface, and during an impact, the impact surface translates along the reaction surface to permit a controlled deflection of a portion of the strike face.

Abstract: A club head conducive to enhancement of resilience includes a body and a panel. The body has a first front side and a first rear side. The panel is disposed on the first front side of the body. The panel has a second top edge, a second bottom edge, a second front side and a second rear side. The second front side is a ball-hitting surface. The second bottom edge extends toward the second rear side to form a wall portion. The wall portion partially sinks to a depth for defining a bending section facing the upper edge. As soon as the panel hits a ball, the bending section deforms and thereby generates bounce resilience.

Abstract: A golf club head includes a club head body and a weight member that is secured to the body in a weight mount. The weight member is constructed to utilize lateral forces to couple to the head body to minimize the structure required to retain the weight member. The weight member includes a spring feature that is movably coupled to a weight body so that it is movable between a first configuration and a second configuration. In the second configuration a portion of the spring feature extends outward from a side wall of the weight body. The weight mount includes an undercut and the spring feature extends into the undercut and is partially flexed by the abutment of the spring feature and a perimeter wall of weight mount when the weight member is disposed in the weight mount.

Abstract: The invention provides a golf club head constructed from multiple components formed of different materials. In particular, a club head of the present disclosure includes a club head body, such as a cast or forged body portion, made from a first metal, and at least one removable component configured to be releasably attached to the club head body, the removable component being made from a second metal that is different than the first metal. The golf club head includes a semi-hollow, or completely hollow-bodied, ball-striking face cartridge made from at least titanium. In some embodiments, the hollow face cartridge may be integrally formed with the club head body. In other embodiments, the hollow face cartridge may be formed separately from the club head body and may be removed from and re-attached to the club head body.

Abstract: A golf club head, preferably a putter head, comprising a replaceable face insert is disclosed herein. The golf club head comprises a body with face cavity and a secondary cavity in communication with, and disposed behind, the face cavity, and at least one opening extending through a top or sole portion into the secondary cavity. The replaceable face insert comprises a striking portion and a support structure extending from a rear surface of the striking portion. The support structure is received within the secondary cavity and the striking portion is received within the face cavity, and then a rod or bolt is inserted through the opening and through the support structure to reversibly secure the face insert to the body. A linear bearing may be disposed within the support structure to receive the rod or bolt.

Abstract: A golf club head includes a face portion, a first faceplate configured to be removably attached to the face portion, a second faceplate configured to be removably attached to the face portion, the second face plate having a different configuration than the first faceplate, and a first fastener and a second fastener configured to attach the first faceplate or the second faceplate to the face portion, each fastener having an indicator configured to indicate a weight associated with the fastener.

Abstract: A golf club head having a replaceable striking face is disclosed herein. More specifically, the present invention discloses a golf club head where at least a portion of the frontal striking surface of the face is detachable and replaceable to improve performance. The replaceable striking face may be connected to the body of the golf club head using at least one screw engaging at least one screw well and said at least one screw receptacle. A golf club in accordance with the present invention may generally have a thinned striking face with a thickness of less than about 3.0 mm yielding a golf club head with a larger sweet spot that's greater than 6% of the frontal striking surface.

Abstract: A golf training device with audio and visual/touch cues for independent golf swing training in an absence of a golf instructor includes a tube having a first end and a second end and an outer surface. A hand grip is disposed at least in part about the outer surface of the tube. A sliding mass is disposed slidingly within the tube, the sliding mass including a chamfer on at least one end of the sliding mass. A ball holding rod is mechanically coupled to the second end of the tube has a ball hold rod first end and a ball hold rod second end. A ball is mechanically coupled to the second end of the ball holding rod. A club head stem extends into a club head, the club head stem is mechanically coupled to the first end of the tube to rigidly affix the club head to the tube.

Abstract: A golf club head includes a club head body and a weight member that is secured to the body in a weight mount. The weight member is constructed to utilize lateral forces to couple to the head body to minimize the structure required to retain the weight member. The weight member includes a spring feature that is movably coupled to a weight body so that it is movable between a first configuration and a second configuration. In the second configuration a portion of the spring feature extends outward from a side wall of the weight body. The weight mount includes an undercut and the spring feature extends into the undercut and is partially flexed by the abutment of the spring feature and a perimeter wall of weight mount when the weight member is disposed in the weight mount.

Abstract: A wood-type golf club head includes a striking wall, a top portion, and a bottom portion comprising a club head wall portion and first and second ribs projecting from the wall portion. The club head also includes a weight element translatable along a weight path and that comprises a first weight portion, a second weight portion, and a fastener, the first and second ribs each being interposed between the first weight portion and the second weight portion such that the first weight portion is located proximate the club head wall portion and the second weight portion is located distal the club head wall portion. The second weight portion further comprises a contact surface having an angular contour including surface portions angled to form at least one non-zero degree vertex, the surface portions being complementary to, and shaped to mate with, the bottom portion of the club head.

Abstract: Golf club heads are releasably engaged with shafts so that the club heads and shafts can be readily interchanged and/or so that the shaft position with respect to the club head can be readily changed. Assemblies for connecting the club head and shaft may include: a shaft adapter, a collet, a ferrule, and a club head having an interior chamber. The club head and shaft may be changed by releasing the securing system and exchanging the original parts with different parts.

Abstract: A universal connector for an adjustable golf club is provided. Such a universal connector includes a first member having a head portion and a body portion and having a bore for receiving a terminal end of a shaft. The connector also includes a second member having a bore for receiving a portion of the first member therein. The first member includes a first anti-rotational member and the second member includes a second anti-rotational member. The first and second anti-rotational members are engageable with one another to prevent relative rotation of the first member relative to the second member about a longitudinal axis of the connector. The second member includes a third anti-rotational member, the third anti-rotational member configured to mate with an anti-rotational member of the golf club head to prevent relative rotation of the second member relative to the head.

Abstract: Golf club heads are releasably engaged with shafts so that the club heads and shafts can be readily interchanged and/or so that the shaft position with respect to the club head can be readily changed. Assemblies for connecting the club head and shaft may include: a shaft adapter, a collet, a ferrule, and a club head having an interior chamber. The club head and shaft may be changed by releasing the securing system and exchanging the original parts with different parts.

Abstract: A golf club includes a shaft, a golf club head including a hosel having an aperture to which the shaft being secured, a securing member configured in a cylindrical shape to cover the shaft, the securing member including a first securing portion detachably fitted to the aperture of the hosel, and an insert member configured in a cylindrical shape to cover the shaft, the insert member including a second securing portion being detachably attachable to the aperture of the hosel and a third securing portion being detachably attachable to the first securing portion of the securing member. The golf club is capable of adopting a first mode of securing the first securing portion to the hosel, and a second mode of securing the insert member to the hosel and securing the first securing portion to the third securing portion of the insert member.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discreet orientations between the shaft and club head.

Abstract: A composite material golf club head is provided having a body made from a first metal and a face insert press fitted to a portion of the body and made from a second metal The metals are chosen so that the first metal is heavier than the second metal. The second metal is disposed towards the front and top of the body, and is preferably hard-anodized. In addition, an interlocking structure, for example rectangular or dove tail shaped channels, is provided in the body so that the face insert becomes embedded in the interlocking structure to anchor the face insert to the body. Portions of the golf club head, such as the face insert or sole plate, are anodized to protect against corrosion. The anodized coating is colored to improve aesthetic characteristics or infused with a polymer to increase or reduce friction.

Abstract: The invention provides a golf club head with a fully removable component that can withstand the stress of repeated hits. When assembled, the removable component is held in place by a fastening mechanism that includes structural elements that distribute the holding force across the component and tend to equalize the forces around the periphery where the component meets the body. The fastening mechanism may include a post that reaches across the open space within the hollow club head, pulling the removable component towards an opposed main club head body. Since a golf club of the present invention can be opened, it may include a mechanism on the inside for use by a golfer, such as an electronic device or an adjustment mechanism. The golf club may include a weight adjustment system that allows the club to be custom-fitted to a golfer.

Abstract: A system of interchangeable club heads sharing one or more shafts and golf bag for carrying the club heads and one or more shafts. The club heads contain a shaft segment to set club length and a coupler to interconnect to the shaft and grip. The shaft contains an opposite gender coupler. The system is very lightweight and much more portable than a conventional set of golf clubs. It also creates the opportunity for players to match club heads with shafts with differing performance characteristics. Additionally, it solves a problem for golfers using long shafts on putters. These long shafts can now be disassembled for storage and transport.

Abstract: A set of progressive golf clubs with an elliptical pad construction on the back of the striking face that corresponds to a location, shape and size of a predetermined golfer's impact pattern for the lofts and lengths of each of the golf clubs in the set. The elliptical pad progressively changes in location, shape and size from the long irons, to the mid irons, to the short irons, and to the wedges, based on the location, shape and size of a predetermined golfer's impact pattern for each of the long irons, mid irons, short irons, and wedges.

Abstract: A golf bag accessory, for indicating the removal of a golf club from a golf bag, has a base member consisting of supporting ring elements. An indicator member with an open top is made of two layers of low friction material surrounding a rubber boot element. The two material layers and the boot element are connected between the ring members. The indicator member extends down from the base member to circumscribe a golf club positioned within the golf bag. Upon removal of the golf club from the golf bag, the indicator member is drawn upwards, ultimately extending up from the base member and out of the golf bag to provide notice to the golfer that a club has been removed and needs to be replaced.

Abstract: A golf club includes: a shaft; a head; and a shaft case, a hosel column, wherein: the shaft case includes a convex axis member provided at a top end of the shaft case; the hosel column includes a plurality of concave threads that are provided on the lower side of a step face on an inner periphery of the hosel column; a flange member is provided at a back end of the shaft case, and a spacer is provided insertable and removable between the flange member and an upper end of the hosel column; a bolt holder is arranged to connect with the step face when the spacer is inserted between the flange member of the shaft case and the hosel column; and the bolt holder is arranged to connect with the upper ends of the concave threads when the spacer is removed.

Abstract: Golf clubs and golf club heads, such as putter heads (102), may include a putter body and an adjustable ball striking face insert (116) forming at least a portion of the ball striking face (104) and contained within the putter body. The insert (116) may have a plurality of sides (118a, 118b, 118c, 118d), each of the sides having different performance characteristics to permit customization of the putter (100). In some examples, the adjustable ball striking face insert (116) may be rotatably mounted within the putter head. Additionally or alternatively, the insert (116) may be removably mounted within the putter head (102). In some arrangements, the insert (116) may be finely adjustable to alter the loft angle of the putter head (102).

Abstract: There is provided a method and system for matching golf clubs to a specific user. The method includes providing both a height and a weight of the specific user; determining physical parameters of the specific user from both the height and the weight; providing data for each golf club; obtaining optimal club mass for a Driver; obtaining optimal values of both a moment of inertia about a grip center and a mass for each golf club; and modifying each golf club to enable each golf club to attain the optimal values. The system involves utilizing the aforementioned information gathered for the method. It is advantageous that each of the golf clubs matched to the specific user are effectively employed with an application of identical swings from the specific user.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discrete orientations between the shaft and club head.

Abstract: The present invention relates to a golf club, and more particularly to a wood-type club head with a separable body component. In certain aspects, the invention provides a golf club head with a face and hosel body member and one or more of an interchangeable aft body member. The invention further provides a variety of insights and mechanisms for coupling the interchangeable member to the body member.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discreet orientations between the shaft and club head.

Abstract: According to an aspect of this invention, a golf club includes: a shaft; a head attached to a distal end of the shaft; a substantially cylindrical shaft case is secured to the distal end of the shaft; the shaft case is inserted into a hosel hole in the head; and the shaft case is fixed to the head by a bolt which is inserted from a sole side of the head, wherein: a stopper member is attached to an outer circumference of the shaft case so that an attaching position can be changed; the stopper member is in abutment with an upper end portion of a hosel; and an inserting depth of the shaft case into the hosel hole can be changed by changing the attaching position of the stopper member.

Abstract: Embodiments of golf coupling mechanisms are presented herein. Other examples and related methods are also disclosed herein.

Abstract: Embodiments of golf coupling mechanisms are presented herein. Other examples and related methods are also disclosed herein.

Abstract: Embodiments of the present invention generally relate to an interactive sports gaming device and methods of manufacturing and utilizing same. More specifically, embodiments of the present invention relate to an interactive sports gaming device simulating the feel of an authentic sports accessory, capable of providing a cost-effective training device for actual sports play. In one embodiment of the present invention, an interactive sports gaming device comprises a housing for supporting a motion detection controller, the motion detection controller for wirelessly communicating with a video game system, and an authentic handle projecting from a first end of the housing, wherein the interactive sports gaming device simulates the feel of an authentic sports accessory.

Abstract: This invention provides a golf club head including a face surface and sole portion. This golf club head includes a main body member, a face member, a sole member, and a fastening structure which fastens the main body member, the face member, and the sole member to be separable from each other. The main body member, the face member, and the sole member include stack portions, respectively, which are stacked on each other. The fastening structure fastens the main body member, the face member, and the sole member together in the stack portions.

Abstract: A golf club head system and a golf club head for inclusion into a golf club are provided. The golf club head system includes two or more rear or secondary body members, each configured for interchangeable attachment to a front or main body member. Each rear body member may have a different external shape, and each rear body member may have a different combination of center-of-gravity and moment-of-inertia characteristics. The system further includes a detachable attachment element for interchangeably and detachably attaching the rear body members to the front body member. The system may further include the front body member, wherein the front body member has a striking surface.

Abstract: A golf club head with an improved Moment of Inertia (MOI) is disclosed herein. More specifically, the present invention relates to a golf club head with a releasable hosel mechanism that is leaner and more lightweight, it allows a significant amount of weight to be saved from the hosel portion of the golf club head and used to improve Center of Gravity (CG) location of the golf club head; which contributes to the improvement of the MOI of the golf club head.

Abstract: A modular golf club includes a plurality of components that are removably coupled so that the physical attributes of the golf club head may be tuned. The inventive golf club head includes a body member and at least one of a removable sole member and a removable face member.

Abstract: A golf club 2 is provided with a head 4, a shaft 6, a tip member 8, and a screw member 10. The shaft 6 is inserted into a shaft hole of the tip member 8, and a tip part of the shaft 6 is fixed to the shaft hole. An axis line s1 of the shaft 6 is inclined with respect to an axis line z1 of the tip member 8. The head 4 has a head hole into which the tip member is inserted, a head side engaging part capable of being engaged with the tip member 8 inserted into the head hole, and a through hole into which the screw member 10 can be inserted. The tip member 8 has a shaft side engaging part 38 capable of being engaged with the head side engaging part.

Abstract: A golf club system includes a club head and a shaft. The club head has a column extending upwardly therefrom, the column having a tooth extending radially outwardly therefrom, the tooth having a first magnet attaching thereto. The shaft has a wall defining a hollow portion that receives the column, the wall having a slot therein the slot having an insertion portion through which the tooth may slide axially and an attachment portion in which the tooth may rotate circumferentially after passing through the insertion portion and a second magnet that engages the first magnet in the tooth after the tooth rotates circumferentially away from the slot.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discrete orientations between the shaft and club head.

Abstract: A system for fitting golf clubs to golfers that enables an overall club length to be varied without varying the length of the golf club shaft. The system enables a greater number of combinations of club characteristics, such as shaft flex, brand, and length, to be contained within a club fitting cart and/or for a same number of combinations of club characteristics to be contained within a smaller cart.

Abstract: A golf club includes: a shaft; a head mounted on a leading end of the shaft; and a substantially cylindrical shaft case fixed to the leading end of the shaft, wherein: the shaft case is inserted into the tubular portion of the hosel of the head; the tubular portion includes a partition plate section in the lower portion thereof; a spacer is interposed between the leading end of the shaft case and partition plate section; the shaft case is unrotatably engaged with the spacer; the spacer and partition plate section respectively include stopper portions for preventing the rotation of the spacer; and a bolt inserted through bolt insertion holes respectively formed in the partition plate section and spacer from the sole side of the head is screwed into the shaft case, whereby the shaft case is fixed to the head.

Abstract: Embodiments of golf coupling mechanisms are presented herein. Other examples and related methods are also disclosed herein.

Abstract: A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discreet orientations between the shaft and club head.

Abstract: A golf putter with repositionable shaft comprising a head, where the head is composed of a top surface, a striking face, a back face, a first end and a second end: three receiving holes along the top surface of the head, where the receiving holes include a threaded inner surface, and a bottom protrusion positioned horizontally within the receiving hole; a pair of plugs threaded into two of the receiving holes; a shaft fitted into one of the receiving holes, where the shaft repositions with the pair of plugs to fill each receiving hole; and a fitting at a bottom end of the shaft, where the fitting includes an insert with a bottom groove, where the bottom groove receives the bottom protrusion to lock the shaft into place within one of the receiving holes.

Abstract: A system and method to re-grip golf clubs includes a series of systematically weighted golf club grips used to achieve a desired swing weight of a golf club. A series of interchangeable weighted tubular fitting grips having a sequence of systematically varying predetermined weights can be removably mounted on a golf club, as desired, to provide the desired swing weight. The tubular fitting grips each have a void through a length of one side of a tubular outer wall allowing each grip to be interchangeably mounted on the golf club.

Abstract: Embodiments of grooves of golf club heads and methods to manufacture grooves of golf club heads are generally described herein. Other embodiments may be described and claimed.