Abstract: Lacrosse heads are provided that include a polymer and graphene. The graphene increases the durability of the lacrosse heads. Also provided is equipment for other contact sports that include graphene to increase durability.

Abstract: The inventive fiber manufacturing process is particularly adapted for demanding applications such as sports racquets, including tennis racquets, badminton racquets and other sports applications. Because of the improved strength to weight ratio of components formed using the inventive method, a wide range of flexibility is achieved, allowing use of the inventive process to manufacture, for example, a fiber reinforced (for example, graphite) modular sports racquet, optionally provided with user-selectable weights and/or handle replacements. From the standpoint of the player, this allows a racquet frame featuring self customization. From the standpoint of a retailer, the benefit provided is reduction of inventory. The inventive fiber, for example graphite fiber) racquet frame is filled with a plastic foam and is formed using, for example, microencapsulation technology to time, generate and apply the pressure used to form the graphite composite material of which the racquet is comprised.

Abstract: A grommet of a racket includes a tubular portion. The tubular portion has a through hole through which a string is passed. The through hole has a base-side opening, a side wall, and a tip-side opening. In the tip-side opening, an inner dimension in a direction parallel to a face is larger than an inner dimension in a direction perpendicular to the face. In the tubular portion, the string is in contact with the side wall from the base-side opening to the tip-side opening.

Abstract: The badminton racket (1) includes a frame (2), a handle (4) and a shaft (6) connecting the frame to the handle. It defines a first direction (D1) parallel to a longitudinal axis (X1) of the shaft, a second direction (D2) perpendicular to the first direction and parallel to a plane (P8) in which strings (8) extend mounted in the frame (2), and a third direction (D3) perpendicular to the first and second directions (D1, D2) and the plane (P8) of the strings. The bending rigidity of the shaft (6) in the third direction (D3) is greater than its bending rigidity in the second direction (D2).

Abstract: The present invention relates to a racket for ball games having a frame comprising a head portion for receiving a stringing and a handle portion for gripping the racket, wherein the frame comprises at least one transparent or translucent portion formed from a transparent or translucent material, said transparent or translucent portion being integrally bonded to the remaining frame. Furthermore, a method for manufacturing such a racket is described.

Abstract: A racket may include a frame including at least one prepreg layer. The at least one prepreg layer may include reinforcing fibers. The at least one prepreg layer may also include a matrix at least partially surrounding the reinforcing fibers. The at least one prepreg layer may also include graphene material.

Abstract: A racket may include a frame including at least one prepreg layer. The at least one prepreg layer may include reinforcing fibers. The at least one prepreg layer may also include a matrix at least partially surrounding the reinforcing fibers. The at least one prepreg layer may also include graphene material.

Abstract: A sports racquet extends along a longitudinal axis and is configured for use with a quantity of racquet string about a string plane. The racquet includes a frame formed of a thermoplastic material. The frame includes a first frame half coupled to a second frame half. The first and second halves include first and second hoop regions, and first and second handle regions, respectively. The first and second handle regions include first and second distal end sections, first and second proximal sections and first and second central sections, respectively. The first and second proximal end sections include transversely extending end wall segments that form a butt end wall. The transverse cross-sectional area of the coupled first and second proximal ends is greater than the transverse cross-sectional area of the coupled first and second distal end sections.

Abstract: A sports racquet extending along a longitudinal axis and configured for supporting a quantity of racquet string generally about a string plane. The racquet includes a frame formed of a thermoplastic material and including a head portion and a handle portion. The head portion is formed of first and second hoop regions. At least one of the first and second hoop regions includes a first set of projections extending from one of the first and second hoop regions across the string plane and engaging the other of the first and second hoop regions. The first set of projections space apart the first and second hoop regions by a first predetermined dimension to define a plurality of through-hoop region openings. The handle portion is formed of first and second handle regions directly coupled together without defining either a plurality of handle openings.

Abstract: A sports racquet extends along an axis and is configured for use with a quantity of racquet string forming a string bed about a string plane. The racquet includes a frame formed of a thermoplastic material, and including first and second halves including first and second spaced apart hoop regions, and first and second handle regions, respectively. The hoop regions includes projections extending from hoop regions in a direction orthogonal to the string plane. At least one of the hoop regions defines a set of bores. The projections are configured to matably engage the bores. The projections extend through the string plane and define curved bearing surfaces configured for engaging and supporting the racquet string. The projections include first and second projections having first and second radii of curvature, respectively. The first radius of curvature being at least 0.5 mm greater than the second radius of curvature.

Abstract: A racquet extending along a longitudinal axis includes a frame formed of a thermoplastic material. The frame includes two halves having two spaced apart hoop regions, two handle regions and two mating surfaces. One of the halves includes a set of projections extending from one of the mating surfaces. At least one of the halves defines a set of bores. The projections are configured to engage the bores. At least two of the projections are stepped projections having a proximal section and a distal section. The transverse cross-sectional area of the proximal section is greater than the transverse cross-sectional area of the distal section. Two of the bores are configured to receive the corresponding distal sections, but not the proximal sections, of the two stepped projections, such that the projected height of the proximal section of the two stepped projections substantially defines the spacing between the hoop portions.

Abstract: The inventive fiber manufacturing process is particularly adapted for demanding applications such as sports racquets. Because of the improved strength to weight ratio of components formed using the inventive method, a wide range of flexibility is achieved, allowing use of the inventive process to manufacture, for example, a fiber reinforced (for example, graphite) modular sports racquet, optionally provided with user-selectable weights and/or handle replacements. The inventive fiber (for example, graphite fiber) racquet frame is filled with a plastic foam and is formed using, for example, microencapsulation technology to time, generate and apply the pressure and gives the same or greater strength for a given size compared to conventional racquets. Advantageously, an outer tubular member may be used to form the racquet frame, with an inner tubular member extending around the head of the racquet frame.

Abstract: A racket may include a frame including at least one prepreg layer. The at least one prepreg layer may include reinforcing fibers. The at least one prepreg layer may also include a matrix at least partially surrounding the reinforcing fibers. The at least one prepreg layer may also include graphene material.

Abstract: A racket may include a frame including at least one prepreg layer. The at least one prepreg layer may include reinforcing fibers. The at least one prepreg layer may also include a matrix at least partially surrounding the reinforcing fibers. The at least one prepreg layer may also include graphene material.

Abstract: A ball-striking implement, in particular a tennis, squash or badminton racket, is described, the implement having a head frame including an impact surface and a stem, which is formed integrally thereon and has a handle, the impact surface being determined by at least one string which is stretched crosswise and forms string portions fastened to the head frame substantially parallel to one another. The string portions are guided in holding elements on the inside of the head frame such that the string portions are positioned in a single plane forming the impact surface.

Abstract: The inventive fiber manufacturing process is particularly adapted for demanding applications such as sports racquets, including tennis racquets, badminton racquets and other sports applications. Because of the improved strength to weight ratio of components formed using the inventive method, a wide range of flexibility is achieved, allowing use of the inventive process to manufacture, for example, a fiber reinforced (for example, graphite) modular sports racquet, optionally provided with user-selectable weights and/or handle replacements. From the standpoint of the player, this allows a racquet frame featuring self customization. From the standpoint of a retailer, the benefit provided is reduction of inventory. The inventive fiber, for example graphite fiber) racquet frame is filled with a plastic foam and is formed using, for example, microencapsulation technology to time, generate and apply the pressure used to form the graphite composite material of which the racquet is comprised.

Abstract: A sports product may include a support member and an impact region configured to impact an object. The impact region may be coupled to the support member. The sports product may also include a shear thickening material in at least one of the support member or the impact region. The shear thickening material may be configured to exhibit shear thickening behavior when an impact occurs between the impact region and the object.

Abstract: A racket frame 10 of the present invention includes fiber reinforced resinous layers. At least one of the fiber reinforced resinous layers is a layer (L1) in which a rubber component is blended. A matrix of the layer (L1) contains a rubber component. When a total weight of a matrix contained in the racket frame 10 is defined as Wm (g) and a total weight of the rubber component contained in the frame 10 is defined as Wg (g), a rate Rg (%) of the total weight Wg to the total weight Wm is 2.5(%) or greater and 17.5(%) or less. In this frame 10, a ratio [Rh/Rs] of plane rigidity Rh to throat rigidity Rs is 0.05 or greater and 0.2 or less. Preferably, the plane rigidity Rh is 30 (kgf/cm) or greater and 70 (kgf/cm) or less. Preferably, the throat rigidity Rs is 250 (kgf/cm) or greater and 800 (kgf/cm) or less.

Abstract: The present invention relates to a racket for ball games having a frame comprising a head portion for receiving a stringing and a handle portion for gripping the racket, wherein the frame comprises at least one transparent or translucent portion formed from a transparent or translucent material, said transparent or translucent portion being integrally bonded to the remaining frame. Furthermore, a method for manufacturing such a racket is described.

Abstract: A sports racquet frame is formed from a plurality of frame sections, some sections formed of a single tubular member and other sections formed of double tubular members. The double tube sections preferably contain string port holes. Also, different frame sections can be made of different materials, e.g., carbon fiber-reinforced composites and aluminum.

Abstract: A racquet frame has one or more string holes formed therein and a string bed plane, along which the string holes extend. The racquet frame is preferably formed by providing a frame bearing structure, which is aimed at providing flexural stiffness to said racquet frame, and structurally integrating the frame bearing structure with a frame binding structure, which is aimed at providing torsional stiffness to the racquet frame. The mutual integration of the frame bearing structure and the frame binding structure forms a composite frame structure, in which one or more of said string holes may be provided.

Abstract: A sports racquet having a plurality of string port holes and conventional string holes is formed of a single tube of prepreg material. When molded, mold elements press opposed portions of the prepreg tube into contact with one another, and shape the adjoining prepreg material into a string port hole blanks. The portion of the pressed-together material which initially blocks the string port hole is removed after molding so that the string port holes extend through the frame. Alternatively, the mold elements cause the prepreg tube to follow a serpentine shape, thereby defining string port holes which are open alternately along the top and bottom surface of the frame. A pair of cover rings may be secured to the top and bottom racquet surfaces to cover the open sides of the string port holes.

Abstract: A system and method for creating a game racket with pre-formed reinforcement members in various openings in the game racket. A composite game racket frame comprising at least one elongated string channel opening in the frame head, bridge or other area, at least one reinforcement member adapted to fit within the elongated opening and configured to allow one or more game racket string to pass through the reinforcement member, and at least one string bearing member adapted to fit on the outside of the game racket frame to support the game racket string.

Abstract: The inventive fiber manufacturing process is particularly adapted for demanding applications such as sports racquets, including tennis racquets, badminton racquets and other sports applications. Because of the improved strength to weight ratio of components formed using the inventive method, a wide range of flexibility is achieved, allowing use of the inventive process to manufacture, for example, a fiber reinforced (for example, graphite) modular sports racquet, optionally provided with user-selectable weights and/or handle replacements. From the standpoint of the player, this allows a racquet frame featuring self customization. From the standpoint of a retailer, the benefit provided is reduction of inventory. The inventive fiber, for example graphite fiber) racquet frame is filled with a plastic foam and is formed using, for example, microencapsulation technology to time, generate and apply the pressure used to form the graphite composite material of which the racquet is comprised.

Abstract: A racket frame 10 of the present invention includes fiber reinforced resinous layers. At least one of the fiber reinforced resinous layers is a layer (L1) in which a rubber component is blended. A matrix of the layer (L1) contains a rubber component. When a total weight of a matrix contained in the racket frame 10 is defined as Wm (g) and a total weight of the rubber component contained in the frame 10 is defined as Wg (g), a rate Rg (%) of the total weight Wg to the total weight Wm is 2.5(%) or greater and 17.5(%) or less. In this frame 10, a ratio [Rh/Rs] of plane rigidity Rh to throat rigidity Rs is 0.05 or greater and 0.2 or less. Preferably, the plane rigidity Rh is 30 (kgf/cm) or greater and 70 (kgf/cm) or less. Preferably, the throat rigidity Rs is 250 (kgf/cm) or greater and 800 (kgf/cm) or less.

Abstract: A composite sports racquet frame including a frame made of composite material, the frame including a head portion configured to receive and surround a string bed with a plurality of string segments, and a handle portion. The head portion includes a tip section on an opposite end of the frame from the handle portion, and the tip section includes a solid cross-section substantially throughout and the remainder of the head portion includes a hollow cross-section substantially throughout.

Abstract: The present invention relates to a method for manufacturing at least a portion of a sports racquet frame that comprises a step a) of providing a moldable tube structure containing a first inflatable bladder and a second inflatable bladder. The first and second inflatable bladders are positioned on opposite first and second regions of the moldable tube structure. At an intermediate region, the tube structure comprises one or more cross channels, which pass through the moldable tube structure. The method according to the present invention comprises also a further step b) of inserting said tube structure inside a mold forming a mold cavity of a desired shape. Mold members are inserted into the cross channels of the tube structure, so that the outer surface of the mold member faces the inner surface of the corresponding cross channel.

Abstract: A novel ball-striking implement, in particular a tennis, squash or badminton racket, is described, with a head frame (1; 13) comprising an impact surface and also a stem which is formed integrally thereon and has a handle, the impact surface being determined by at least one string (3; 19) which is stretched crosswise and forms string portions fastened to the head frame substantially parallel to one another. The string portions in holding elements (2; 15) on the inside of the head frame are guided in such a manner that the string portions are positioned in a single plane forming the impact surface.

Abstract: An institutional badminton racket including a head and a flexible plastic handle. The head has a metal rim around a shuttlecock striking face, and a neck rigidly secured to the rim, where the neck includes a hollow throat extending from the rim away from the striking face with lateral openings through the throat. The handle connecting end includes a first portion extending into the hollow throat, a second portion surrounding the throat, pin portions extending through the throat lateral openings and integral with the first and second portions, and a pair of wings extending generally in the plane in a lateral direction toward the head and including openings therethrough. A Y-clamp is secured around the handle connecting end and the head rim adjacent the head neck and including pins extending through the wing openings.

Abstract: The racket (2) for ball games of the present invention comprises a frame which is formed by a frame profile or a hollow profile and has a racket head and a handle portion connected thereto preferably via a heart region. Two indentations (12) that are symmetrical relative to the longitudinal axis of the racket are provided in the heart region of the frame. A vibrating device (20) is arranged in each of the two indentations. The vibrating means of the racket of the present invention are preferably effective for vibrations having at least two vibration modes or degrees of freedom. The invention further relates to a racket for ball games comprising a frame which forms a head region for receiving strings and a handle portion for holding the racket, wherein the frame comprises one respective inwardly-facing C-profile in at least two segments of the head region.

Abstract: A sports product may include a support member and an impact region configured to impact an object. The impact region may be coupled to the support member. The sports product may also include a shear thickening material in at least one of the support member or the impact region. The shear thickening material may be configured to exhibit shear thickening behavior when an impact occurs between the impact region and the object.

Abstract: A sports racquet frame is formed from a plurality of frame sections, some sections formed of a single tubular member and other sections formed of double tubular members. The double tube sections preferably contain string port holes. Also, different frame sections can be made of different materials, e.g., carbon fiber-reinforced composites and aluminum.

Abstract: A racket frame has a head hoop, a connecting segment, a handle and two prestressing devices. The head hoop has a bottom end and a string. The connecting segment is connected with the head hoop and has a yoke, two shafts and a throat. The yoke is formed on the bottom end of the head hoop. The shafts are respectively mounted with the yoke and each shaft has a mounting hole. The handle is connected with the connecting segment.

Abstract: A game racquet includes head portion and a handle portion. The head and handle portions include one or both of a fiber-reinforced thermoset material and a fiber-reinforced thermoplastic material. The handle portion is coupled to the head portion by shock and/or vibration absorbing material.

Abstract: A tennis racket frame is composed of a laminate of prepregs each containing carbon fibers serving as a reinforcing fiber thereof. At least one part of layers of the laminate is formed as a hard layer consisting of a prepreg composed of the reinforcing carbon fibers and a hard carbon film (DLC film) formed on the surface of the carbon fibers.

Abstract: In a tennis racket having a racket frame composed of a fiber reinforced resin, the moment of inertia Ic of the tennis racket in a center direction thereof is set to not less than 13000 g·cm2 nor more than 17000 g·cm2, the moment of inertia Ig around a center of gravity thereof is set to not less than 80000 g·cm2 nor more than 200000 g·cm2, and the moments of inertia Ic and Ig are so set as to satisfy a relationship expressed by [30×(Ic)?(Ig)]/10000?31.

Abstract: A racket frame including a first laminate composed of a plurality of first prepregs consisting of fiber reinforced resin and a second prepreg, consisting of fiber reinforced resin, which is layered on the first laminate. The first laminate has a loss factor (=tan ?) set to not less than 0.005 nor more than 0.02, when the loss factor is measured at a temperature of 10° C. and a frequency of 10 Hz. The second prepreg has a loss factor (=tan ?) set to not less than 0.10 nor more than 0.50, when the loss factor is measured at a temperature of 10° C. and a frequency of 10 Hz.

Abstract: A sports racquet frame is built of a composite of laminations of fibrous material as impregnated by a thermosetting resin. The head section of the frame has an upper tube preferably disposed above the string bed plane and a lower tube preferably disposed below the string bed plane. A solid bridge of material integrally joins the upper tube to the lower tube. In a preferred embodiment the bridge is disposed radially exteriorly of the center line of the tubes, to maximize the length of string segments, which are strung to the bridge.

Abstract: A tennis racket frame (10), including a sleeve composed of a fiber reinforced resin, having a weight not less than 180 g nor more than 270 g, when strings are not mounted in a ball-hitting face thereof surrounded with a head part thereof. Supposing that the strings are not mounted in the ball-hitting face, a secondary natural frequency (F1) of the racket frame in an in-plane direction thereof is set to not less than 200 Hz nor more than 320 Hz, a secondary natural frequency (F2) thereof in an out-of-plane direction thereof is set to not less than 480 Hz nor more than 650 Hz, and F1/F2 is set to not less than 0.3 nor more than 0.6.

Abstract: A racket frame (10) including a laminate having not less than two fiber reinforced resinous layers layered one upon another and one or more modified fiber reinforced resinous layers (20) each containing a modified resinous composition, as a matrix resin, having a loss factor (=tan ?) not less than 0.5 nor more than 3.0, when the loss factor is measured at a temperature of 0° C. to 10° C. and a frequency of 10 Hz. A weight of the modified fiber reinforced resinous layers (20) is set to not less than 1% nor more than 10% of a weight of the fiber reinforced resinous layers.

Abstract: A racket frame is constructed to include a body, the body having an endless head and a shaft extended from the endless head for the mounting of a grip, and two wooden strips fastened to the endless head of the body at two sides, the wooden strips taking about 5%˜70% of the volume of the racket frame.

Abstract: A racket frame (1) has a pipe-shaped racket-frame body (2) made of a fiber reinforced resin and composed of a head (3), a throat part (4), a shaft part (5), and a grip part (6) sequentially arranged and a yoke (10) connected to the racket-frame body (2). In this construction, supposing that the head (3) is a clock face and that the top position of the head (3) is 12 o'clock, a yoke rigidity value at a central position P1, vertical to a ball-hitting face (F), of the yoke (10) in a longitudinal direction thereof is in a range of 10% to 70% of a face rigidity value which is an average of a rigidity value at a 12 o'clock position (P2) vertical to the ball-hitting face (F) and a rigidity value at a three o'clock position (P3) vertical to the ball-hitting face (F).

Abstract: A racket is composed of multiple sections of tubes made of different material with resilient material bonded between the tubes at the joints to attenuate vibration and shock and thus make striking a ball more comfortable for a player.

Abstract: A frame body (2) is formed separately from a yoke (10) connecting right and left parts of the frame body (2) to each other. The yoke (10) and the frame body (2) are connected to each other by a mechanical connection means, with both ends of the yoke (10) in contact with the right and left parts of the frame body (2) in an area of not less than 10 cm2 (1.6 in2). A shear force generated when the racket frame (1) deforms is collectively applied to a connection surface of the frame body (2) and that of the yoke (10) to increase a vibration-damping performance of the racket frame (1).

Abstract: An improved racket frame without the need of drilling holes comprises two compound material pipe bodies. A plurality of U-shaped embedded tubes are uniformly clamped between the two pipe bodies with two openings of each of the U-shaped embedded tubes facing the same direction. A compound material layer sheathes the two pipe bodies and the U-shaped embedded tubes with only the two openings of each of the U-shaped embedded tubes being exposed. The compound material layer is then placed into a mold and blown and heated to form an integral racket frame structure having th rough holes. Meshes conventionally exposed out of the racket frame are hidden in the racket frame, hence reducing abrasion of the meshes, lengthening the lifetime of use of the meshes, and enhancing the delicacy. Because there is no need of drilling holes twice, the structure of the racket frame will not be damaged.

Abstract: A tubular structural member that provides directional resistance. The tubular structural member has a flexural resistance that is greater in one direction than in another. The tubular structural member can be employed in variety of devices or structures so as to effect the overall stiffness of the device.

Abstract: A sports racket frame including a main body which has an intermediate portion in the vicinity of which is provided at least one reinforcing member which defines, with the intermediate portion, an inner volume therebetween which extends about an outer periphery of the intermediate portion.

Abstract: The present invention provides a compound material frame body without the need of drilling holes. A plurality of symmetric embedded tubes are clamped between two compound material pipe bodies. An outmost compound material layer sheathes the compound material pipe bodies and the embedded tubes with two openings of each of the embedded tubes being exposed. An integrally formed compound material frame body having through holes can immediately be obtained by blowing and heating in a mold. Because there is no need of drilling holes, the structure of the frame body will not be damaged. Moreover, the present invention can achieve the effects of simple manufacturing process, short manufacturing time, and reduced cost.

Abstract: A method for manufacturing racket with shock absorbing members includes step 1 to form a shaft having two extensions; step 2 to wrap two respective shock absorbing members on the two extensions; step 3 to form a head having two tubular portions extending therefrom, and steps 4 to securely insert the two extensions wrapped with the shock absorbing members in the two tubular portions.

Abstract: A method for manufacturing racket with shock absorbing members includes step 1 to form a shaft having two extensions by composite prepreg material; step 2 to wrap two respective shock absorbing members on the two extensions; step 3 to form a head having two tubular portions extending therefrom by composite prepreg material, and steps 4 to insert the two extensions wrapped with the shock absorbing members in the two tubular portions and to heat the combination in a mold.