Abstract: The present application discloses an accessory for items of sporting equipment. Implementations may provide an accessory comprising a structure configured to be affixed to a first end of an item of sporting equipment meant to be swung or rotated, such as a baseball bat, lacrosse stick, or tennis racquet. The addition of the accessory results in movement of the center of mass of the sporting item. Implementations may be varied in weight and dimension such that the center of mass of the sporting item is moved to a location optimal for the demands of the sport and individual athletes' needs. Implementations may also provide for modifiable weight or dimension of the accessory.

Abstract: A bat handle weight includes a body having a transverse hole with a bat end opening sized to allow a bat handle end to be inserted into the transverse hole. The transverse hole tapers inward at an opposite end from the bat end opening to be narrower than the bat handle end, but wider than the bat handle. The bat handle weight is placed on the bat by placing the bat handle end into the bat end opening, and then rotating the body of the bat handle weight relative to the bat, where the inward tapered portion of the transverse hole bears against the top of the bat handle end, and the user's hand will bear against the outside of the bat handle weight when grasping the bat by the handle, thereby securing the bat handle weight on the bat so that the bat can be swung without the bat handle weight coming off the bat.

Abstract: A process for manufacturing a putter with a bi-material shaft is disclosed herein. The putter comprises a putter head, the bi-material shaft, a mass member and a grip. The bi-material shaft comprises a body with a tip end and a butt end. The body comprises a metal section extending from the tip end to a connection point, and a composite section extending from the butt end to the connection point. The mass member is positioned within an opening at the butt end of the shaft. Mass from the shaft is transferred to the club head and the mass member in the butt end of the shaft.

Abstract: An exercise device includes a first exercise bar. The first exercise bar includes a first tube extending from a first end to a second end and defining a cavity, a first weight configured to be selectively received within the first cavity, and a first slow loading mechanism coupled to the first tube proximate the second end and configured to contact the first weight when the first weight is received by the first cavity to provide a friction force to the first weight to slow the loading of the first weight into the first cavity.

Abstract: A golf swing speed trainer for releasable attachment via a retainer to a shaft sleeve of a golf club shaft, including a head, a sleeve, and a weighting system. The trainer provides a highly customizable golf swing speed trainer that more accurately mimics the feel of a real club as a golfer works to increase their swing speed, without introducing any new bad habits. It allows a golfer to use their “gamer” shaft and grip during speed training, thereby increasing the user's familiarity with the trainer, which should result not only in increased swing speed but also improved consistency and accuracy.

Abstract: A grip assembly comprising a grip body that extends between an upper butt end and a distal end. The grip body has a topside and a pair of sides that extend from the topside to a rear underside. The grip body defines a bore extending between the upper butt end and the distal end. The rear underside of the grip body defines a surface and a channel in the surface. An outer wrap permanently encases around an entire circumference of the grip body along a portion of a length of the grip body.

Abstract: Attachment of an interchangeable grip sleeve particularly suited for golf requires three basic securing movements. In the first movement, the grip is situated and secured into place on the shaft by fastening toe components at the lower, distal portion of the grip onto the shaft using an insertion tool. In the second movement, heel components of the grip are positioned onto the shaft, by either rotational torque or downward pressure, optionally using a tightening tool, which results in securing the upper, proximal portion of the grip onto the shaft. In the third movement, once both heel and toe embodiments of the grip have been fastened to the shaft, the internal core diameter of the grip is decreased in order to secure the grip to the shaft, such as by rotating or twisting the entire grip body, wherein an internal mechanism maintains the grip body in the torqued or twisted position, thereby preventing the grip body from rotating back.

Abstract: A golf club includes a head; a shaft having a tip end and a butt end; a grip; and a weight member that is located in a butt end region having a distance from a butt end of the grip of less than or equal to 100 mm. The grip and the weight member constitute a grip-weight portion. The shaft, the grip, and the weight member constitute a shaft-grip-weight portion. The shaft has a weight of less than or equal to 40 g. The shaft has a shaft torque of less than or equal to 7.0°. The grip-weight portion has a weight of greater than or equal to 40 g. A ratio W1/W3 of a weight W1 of the butt end region to a weight W3 of the shaft-grip-weight portion is greater than or equal to 0.40.

Abstract: An exercise device includes a first exercise bar. The first exercise bar includes a first tube extending from a first end to a second end and defining a cavity, a first weight configured to be selectively received within the first cavity, and a first slow loading mechanism coupled to the first tube proximate the second end and configured to contact the first weight when the first weight is received by the first cavity to provide a friction force to the first weight to slow the loading of the first weight into the first cavity.

Abstract: A golf club includes a head; a shaft having a tip end and a butt end; a grip; and a weight member that is located in a butt end region having a distance from a butt end of the grip of less than or equal to 100 mm. The grip and the weight member constitute a grip-weight portion. The shaft, the grip, and the weight member constitute a shaft-grip-weight portion. The shaft has a weight Ws of less than or equal to 40 g. The shaft has a flex point ratio of less than or equal to 50%. The grip-weight portion has a weight W2 of greater than or equal to 40 g. A ratio W1/W3 of a weight W1 of the butt end region to a weight W3 of the shaft-grip-weight portion is greater than or equal to 0.40.

Abstract: A golf club includes a head; a shaft; a grip; and a weight member that is located in a butt end region. The grip and the weight member constitute a grip-weight portion. The shaft, the grip, and the weight member constitute a shaft-grip-weight portion. The golf club has a length of greater than or equal to 45.0 inches. The golf club has a weight of less than 295 g. The head has a weight of greater than or equal to 195 g. The grip-weight portion has a weight of greater than or equal to 40 g. W1/W3 is greater than or equal to 0.40, where W1 represents a weight (g) of the butt end region, and W3 represents a weight (g) of the shaft-grip-weight portion.

Abstract: A golf club includes a head; a shaft; a grip; and a weight member that is located in a butt end region. The grip and the weight member constitute a grip-weight portion. The shaft, the grip, and the weight member constitute a shaft-grip-weight portion. The head has a weight of greater than or equal to 195 g. The grip-weight portion has a weight of greater than or equal to 40 g. The shaft has a weight of less than or equal to 40 g. The golf club has a weight of greater than or equal to 275 g and less than or equal to 300 g. W1/W3 is greater than or equal to 0.40, where W1 represents a weight (g) of the butt end region, and W3 represents a weight (g) of the shaft-grip-weight portion.

Abstract: A golf club includes a head; a shaft having a tip end and a butt end; a grip; and a weight member that is located in a butt end region having a distance from a butt end of the grip of 100 mm or less. The grip and the weight member constitute a grip-weight portion. The shaft, the grip, and the weight member constitute a shaft-grip-weight portion. The golf club has a weight of less than 295 g. The head has a weight of greater than or equal 195 g. The grip-weight portion has a weight of greater than or equal to 40 g. The head has a gravity center distance of greater than or equal to 44.5 mm. A ratio W1/W3 of a weight W1 (g) of the butt end region to a weight W3 (g) of the shaft-grip-weight portion is greater than or equal to 0.40.

Abstract: A golf club head includes a golf club body including a crown, a sole, and a skirt connected between the crown and the sole, the golf club body including a front including a leading edge and a back including a trailing edge, and a hosel connected to the golf club body; a face connected to the front of the golf club body, the face including a geometric center, the golf club head including modifiable boundary conditions.

Abstract: A golf club head includes a face, a crown, a sole, and defines a bore that is configured to receive and to selectively retain an elongate weight. The bore is aligned on a longitudinal axis that intersects the face. An elongate weight is insertable into the bore. The elongate weight is rotatable between a first angular position and a second angular position. The golf club head can further include a compliant stop positioned to contact a protrusion of the elongate weight, such that a torque threshold must be overcome to rotate the elongate weight.

Abstract: Removable and re-attachable grips design to allow simple, fast changing of grips on shaft. The present disclosure relates in general to a re-changeable or interchangeable grip particularly suited for golf whose attachment requires three basic securing movements. In the first movement, heel components of the grip are first positioned onto the shaft, by either rotational torque or downward pressure, which result in securing the upper, proximal portion of the gripping sleeve onto the shaft. In the second movement, once the grip is situated and secured into place on the shaft, the grip is centered on the shaft by fastening toe components at the lower, distal portion of the grip sleeve onto the shaft.

Abstract: Attachment of an interchangeable grip sleeve particularly suited for golf requires three basic securing movements. In the first movement, the grip is situated and secured into place on the shaft by fastening toe components at the lower, distal portion of the grip onto the shaft using an insertion tool. In the second movement, heel components of the grip are positioned onto the shaft, by either rotational torque or downward pressure, optionally using a tightening tool, which results in securing the upper, proximal portion of the grip onto the shaft. In the third movement, once both heel and toe embodiments of the grip have been fastened to the shaft, the internal core diameter of the grip is decreased in order to secure the grip to the shaft, such as by rotating or twisting the entire grip body, wherein an internal mechanism maintains the grip body in the torqued or twisted position, thereby preventing the grip body from rotating back.

Abstract: Removable and re-attachable grips design to allow simple, fast changing of grips on shaft. The present disclosure relates in general to a re-changeable or interchangeable grip particularly suited for golf whose attachment requires three basic securing movements. In the first movement, heel components of the grip are first positioned onto the shaft, by either rotational torque or downward pressure, which result in securing the upper, proximal portion of the gripping sleeve onto the shaft. In the second movement, once the grip is situated and secured into place on the shaft, the grip is centered on the shaft by fastening toe components at the lower, distal portion of the grip sleeve onto the shaft.

Abstract: A system and method for weighting a golf club. The system is configured to adjust the overall club weight and the weight balance of a golf club. The system includes a weight assembly formed with a plurality of flexible cantilevered arms that interact with a weight member.

Abstract: The invention generally relates to a grip for a golf club having a housing portion specifically for housing an accessory, the grip specifically configured to enhance performance and enjoyment of the game of golf. Grips of the invention help to provide a smoother gripping surface and to prevent relative motion between the accessory and the club when the accessory is coupled to the club.

Abstract: A system for optimizing weight distribution of a golf club, including a weight receiving grip, wherein the weight receiving grip comprises a generally tubular member comprising a shaft bore configured to surround a proximal portion of the shaft, wherein the weight receiving grip comprises a weight retention portion at a proximal end of the weight receiving grip, the weight retention portion configured to engage a weight member; wherein the weight retention portion of the weight receiving grip further comprises an enlarged bore portion proximal the shaft bore, wherein the weight retention portion of the weight receiving grip further comprises a cavity proximal the enlarged bore portion, and wherein the diameter of the cavity is greater than the diameter of the enlarged bore portion and the diameter of the enlarged bore portion is greater than the diameter D1 of the shaft bore.

Abstract: Removable and re-attachable grips design to allow simple, fast changing of grips on shaft. The present disclosure relates in general to a re-changeable or interchangeable grip particularly suited for golf whose attachment requires three basic securing movements. In the first movement, heel components of the grip are first positioned onto the shaft, by either rotational torque or downward pressure, which result in securing the upper, proximal portion of the gripping sleeve onto the shaft. In the second movement, once the grip is situated and secured into place on the shaft, the grip is centered on the shaft by fastening toe components at the lower, distal portion of the grip sleeve onto the shaft.

Abstract: The present invention is directed to a selectable weight assemblies for insertion into a golf club shaft. An embodiment of the selectable weight assembly includes a plug, a sleeve, a socket, a primary weight, and a bushing coaxially assembled in order along a major axis corresponding to the central axis of the golf shaft interior. The plug includes a flange and threaded shaft, the flange including a circumferential lip portion operative to contact the upper surface of the shaft and provide a positive lock for securely keeping the selectable weight assembly secured to the golf club. The threaded shaft extends downwardly and distally from the flange section. The sleeve section is adjacent the plug and substantially cylindrical, with an opening extending therethrough. The sleeve further includes at least one slot extending longitudinally generally in the same direction as the primary axis, facilitating radial expansion of the sleeve.

Abstract: A system for optimizing weight distribution of a golf club including a weight receiving grip, the weight receiving grip configured to be affixed to a proximal end of a golf club shaft, wherein the weight receiving grip comprises a generally tubular member comprising a shaft bore configured to surround a proximal portion of the shaft, wherein the weight receiving grip comprises a weight retention portion at a proximal end of the weight receiving grip, the weight retention portion configured to engage a weight member, a grip expanding tool configured to deflect a portion of the weight receiving grip facilitating installation or removal of the weight members from the weight receiving grip.

Abstract: A weight-adjustable-counterbalance apparatus includes a shell and at least one or more weighting member selectively added to the shell. The shell includes a container having an annular lateral wall and an end wall, and defines an opening at an end and a compartment. A first restrainer releasably fits on the end wall and in a manner being prevented from rotating relative to the container. A second restrainer releasably fits on the end of the container and in a manner being prevented from rotating relative to the container. A fastener releasably secures the first retainer, the container, and the second retainer together. The fastener has a first end retained on the first restrainer, a body inserting into the compartment, and a second end extending outside the opening and engaging with the second restrainer. The at least one or more weighting member is added by releasably fitting on the fastener.

Abstract: A solution is provided to enhance motion detection and recognition of moving objects associated with various sports by intelligently embedding motion sensors into sport instruments such as tennis rackets, badminton rackets, baseball bats and golf clubs, that are swung in a three-dimensional (3D) space. The motion sensors embedded inside the sport instruments are securely locked and are detachable for replacement. A motion sensor inserted and locked inside a sport instrument is configured to detect motions associated with movements associated with the sport instrument. The motion parameters associated with the detected motion are collected through the embedded motion sensor and analyzed by a motion detection and recognition system. Based on the analysis of the motion parameters, various types of sports performance reports and performance improvement recommendations are generated for users of the sport instruments.

Abstract: Described are embodiments of putters that include a counterbalance weight located at the butt end of the shaft. The shaft and/or grip of disclosed putters can have reduced mass while the putter head and the butt of the shaft can have increased mass compared to conventional putters, which provides a similar overall total mass but with an increase in the moment of inertia (MOI). The increase in MOI compared to a conventional putter of similar style and mass can provide increased swing stability during a stroke, decreasing unintentional waggling about the hand grip fulcrum. The added weight in the putter head and the added weight in the butt of the putter can counterbalance each other so that the overall swingweight of the putter can be about the same as for a conventional, non-counterbalanced putter having the same total mass, thereby providing a familiar feel and easy playability.

Abstract: A golf club grip for a golf club includes an elongated member having a first end, a second end, an inner surface and an outer surface. The first end is configured to receive a golf club shaft. The second end includes an opening that comprises an insert having a first threaded portion therein. The elongated member comprises a stopper extending inward from the inner surface a predetermined distance. The stopper separates the golf club shaft and insert.

Abstract: A method is disclosed for installing and optimizing adjustable swing-weight in a vibration-damped manner inside a golf club shaft. A plug assembly of selectable weight is inserted through a circular opening in the golf grip cap with a special tool, moved to any desired location within the shaft and securely fastened in place in a vibration-damped manner by a resilient, cylindrical, radially-expandable element. At least one weight rod, made available in different materials, lengths and weights, is spaced from the shaft by one or more resilient damper sleeves to minimize shaft vibration. The expandable element is secured by a machine screw threaded into the upper end of the weight rod, and is dimensioned (unexpanded) so as to enable easy insertion and location adjustment of said plug assembly.

Abstract: A golf club swing training apparatus and a method for fabricating it are provided. The apparatus includes a golf club shaft and a slide mechanism. The shaft includes an upper portion and a lower portion that are spaced apart to form a gap there-between. The slide mechanism is inserted within this gap and is connected to the lower end of the upper shaft portion and the upper end of the lower shaft portion. The slide mechanism includes an upper connector, a sliding rail, a rail guide block, and a lower connector that are configured to permit a lateral shift of this lower portion relative to this upper portion during a swinging of the club. The method uses an axial alignment apparatus to maintain the elongated axis of the upper shaft portion in substantial alignment with the elongated axis of the lower shaft portion when the slide mechanism is being connected.

Abstract: A stiffened handle assembly for a cleaning device such as a broom with an internal weight whose position is adjustable by the user to change the center of gravity of the cleaning device for ease of use. As an option, the handle assembly may be attached to a broom head, mop head, or other cleaning device, or a coating application device such as a paint roller, floor wax applicator.

Abstract: There is provided a method and system for adjusting the weight of a golf clubs. The method includes receiving a target additional weight for the golf club. A weighted filler is selected corresponding to the target additional weight and the interior volume of the golf club. The initially viscous weighted filler is injected into the golf club interior and allowed to cure.

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: An improved putter and method of use utilizing a putter shaft having a rectangular grip extending approximately half the shaft length. A polygonal-like ring provides a flat face with an extended toe and a short heel. The face of the putter head has a polymeric insert for weight redistribution and for better putting feel. The sides of the putter include triangular shaped indents also for weight redistribution. The rear of the putter head is arched to prevent ground contact during putting and further to increase head stability during the stroke.

Abstract: A weighted grip for a golf club is disclosed. The weight is preferably a metal, such as iron and its alloys, especially steel, copper and its alloys, such as brass and bronze, tungsten and its alloys, especially tungsten, aluminum and its alloys, ceramics, including cermets, and can take the form of a cylindric shape concentric with the grip, and embedded in the moldable composition forming the grip. In other embodiments the weight can be at, or near, the extreme end of the grip. Other shapes, forms and locations of the weight are disclosed, as well as combinations of the weight with a grip formed of a moldable composition having a heavy filler therein. The combination of the grip and a golf club are also disclosed.

Abstract: A grip including a weight for a golf club is provided. The grip includes an opening with a first threaded portion. The weight includes a second threaded portion configured to engage the first threaded portion of the grip.

Abstract: A weighted grip for a golf club is disclosed. The weight is preferably a metal, such as iron and its alloys, especially steel, copper and its alloys, such as brass and bronze, tungsten and its alloys, especially tungsten, aluminum and its alloys, ceramics, including cermets, and can take the form of a cylindric shape concentric with the grip, and embedded in the moldable composition forming the grip. In other embodiments the weight can be at, or near, the extreme end of the grip. Other shapes, forms and locations of the weight are disclosed, as well as combinations of the weight with a grip formed of a moldable composition having a heavy filler therein. The combination of the grip and a golf club are also disclosed.

Abstract: A golf club 2 includes a shaft 6, a grip 8 mounted to an end part of the shaft 6, a cavity body 10 mounted to the end part of the shaft 6 to which the grip 8 is mounted, and a weight body 12 detachably mounted to the cavity body 10. The cavity body 10 includes a polymer. Preferably, an outer peripheral surface 16a of the cavity body 10 is mounted to an inner peripheral surface 6a of the shaft so as to abut on the inner peripheral surface 6a. Two or more projections are formed on one of the outer peripheral surface 16a of the cavity body 10 and the inner peripheral surface 6a of the shaft. Two or more recessed parts are formed on the other. The two or more projections are engaged with the two or more recessed parts.

Abstract: A golf club with improved weight distribution is disclosed herein. More specifically, the present invention discloses a golf club with a lightweight shaft allowing the golfer to achieve higher swing speed, while shifting the weight savings of the shaft to a grip portion of the club; counterbalancing some of the undesirable performance characteristics associated with a lightweight shaft.

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: A device for changing the mass characteristics of a golf club may include a first movable mass. The device may also include a first movable mass guide configured to accommodate longitudinal travel of the first movable mass along the golf club shaft. The first movable mass guide may not extend beyond the distal end of the golf club shaft. The golf club head may include a second movable mass and a second movable mass guide that accommodates travel of the second movable mass.

Abstract: A highly versatile damper-weight system enables the installation of adjustable swing-weight in a vibration-damped manner inside a golf club shaft. A plug assembly of selectable weight is inserted through a circular opening in the golf grip cap with a special tool, moved to any desired location within the shaft and securely fastened in place in a vibration-damped manner by radial expandable of a cylindrical resilient expandable element. A weight rod, made available in different materials, lengths and weights, is spaced from the shaft by one or more resilient damper sleeves to minimize shaft vibration. The expandable element is secured by a machine screw threaded into the upper end of the weight rod, and is dimensioned (unexpanded) to enable easy insertion and location adjustment of said plug assembly.

Abstract: A lightweight grip assembly is disclosed herein. The lightweight grip assembly comprises a rigid support structure comprising a hollow portion and a grip portion comprising a substantially uniform thickness, wherein the grip portion is disposed on an external surface of the rigid support structure. The lightweight grip assembly may be used in connection with golf club shafts and heads having one or more adjustable features to increase the amount of overall discretionary weight available to a golfer.

Abstract: A golf club having a value of L not less than 45.5 inches, with L representing a club length measured with a 60-degree method, includes a shaft, a grip attached to one end of the shaft, and a head attached to the other end of the shaft. A value of r/L is equal to or not smaller than 0.658 and equal to or not greater than 0.732, where r represents a distance from an upper end of the grip to the center of gravity of the golf club. Thus, a long-length golf club achieving an increased head speed can be obtained.

Abstract: A variable length golf club shaft is disclosed herein. The variable length golf club shaft includes at least one upper shaft portion having a first diameter and a hollow lower shaft portion having a second diameter that is larger than the first diameter, wherein the lower shaft portion has at least one notch, and wherein the at least one upper shaft portion has at least one pin that fits within the at least one notch.

Abstract: A golf club with improved weight distribution is disclosed herein. More specifically, the present invention discloses a golf club with a lightweight shaft allowing the golfer to achieve higher swing speed, while shifting the weight savings of the shaft to a grip portion of the club; counterbalancing some of the undesirable performance characteristics associated with a lightweight shaft.

Abstract: To provide a swingweight whose position of the center of gravity is appropriately fine-adjusted depending upon the situation, the swingweight of the present invention has a securing part, a support shaft and a weight, and is mounted to a grip end, and it is possible for the weight to be moved to any position in the axial direction of the support shaft and to be secured.

Abstract: There is provided a golf club where a separation of a weight for swingweight adjustment can be certainly prevented and the weight can be easily detached/attached and replaced; concurrently, the center of gravity is slanted toward the shaft side, and the center of gravity position can be stabilized. The golf club 10 has a grip part 16 and a weight part 18. A threaded shaft 26 is established at the grip part 16 side, and a female screw part 22 is established in the weight part 18. In the gold club 10, the grip part 16 and the weight part 18 can be integrated in the state where a spring washer 30 is interposed, by screwing a threaded shaft 26 with a female screw part 22 under a condition where the spring washer 30 is mounted to the threaded shaft 26.

Abstract: A customizable sports implement system includes a sports implement having an elongate primary shaft and an elongate grip shaft, and a customizing mechanism including length setting and weight components having a plurality of different assembly combinations, each of which may be installed within a cavity formed in one of the primary shaft and the grip shaft to set a playing length and playing weight of the sports implement. The sports implement system is adjustable among a plurality of different customized configurations by swapping different assembly combinations of the length setting and weight components into the cavity. A method of customizing a sports implement system includes adjusting the sports implement system among different customized configurations by swapping combinations of the length setting and weight components for one another within the cavity, and adjusting a length setting state of the length setting component.

Abstract: The instant invention provides a putter for use by a golfer in playing golf. The putter includes: a shaft long enough to rest against the abdomen; a head of greater than conventional mass fixed to the first end of the putter; and, a handle fixed to the second end of the putter. The handle further includes: an upper hand grip; a lower hand grip substantially length to rest against the abdomen navel dimensionally spaced from the upper hand grip; and, a counterweight positioned within the handle substantially near the upper hand grip, for providing the putter with a conventional center of gravity. The putter is designed for maximizing the sweet spot of the head while enabling the golfer to putt a golf ball by pivoting the putter substantially only at a point located at about the upper hand grip, from an otherwise conventional crouched stance.