Abstract: An object is to provide a badminton racket capable of easily achieving different performance properties on both sides of the hitting surface easily. A racket includes a frame which extends annularly, a grip, and a string which is stretched across the frame to form a hitting surface on both sides of the frame. The frame is formed to make the front surface portion and the back surface portion thereof asymmetrical in shape in a cross sectional view taken along a plane orthogonal to the extension direction of the frame. The formation of the frame into such an asymmetrical shape makes it possible to change performance properties on shuttlecock hitting between the front and back sides of the hitting surface at the time of hitting the shuttlecock, thus making it possible for the player to obtain two difference capabilities with the single racket simply by changing his or her grip.

Abstract: The present invention is directed to a racquet design with an inner and outer frame connected by an isolation system. Uniquely adapted to tennis racquets, the natural motion of the inner frame relative to the outer frame upon impact of the tennis ball on the inner frame will generate spin when the ball contacts the inner frame. The relationship between the inner frame, outer frame and isolation system can control the spin imparted to the ball for a given tennis swing. The tuning of the isolators relative to conventional racquet characteristics will increase the amount of ball spin caused by conventional racquets. The invention also increases the accuracy of the tennis ball's trajectory.

Abstract: A vibration isolation system for hand implements including sporting equipment and tools to substantially reduce impact forces from being delivered to the user's hands. Isolation elements provide low spring rates enabling the system to isolate bending vibration, recoil, and twist. An outer shell member substantially encircles the grip end of the hand implement and is spaced outwardly thereto allowing the grip end to freely deflect within the outer shell member.

Abstract: The racket includes a handle (2) and a frame (4) defined by an inner frame (40) and an outer frame (42), said frame further including shock-absorbing means (50) positioned between the peripheral outer surface of the inner frame and the peripheral inner surface of the outer frame. The frame further includes at least one fitting member (60) having an elongate body (62) and extending against the outer surface of the outer frame (42), and at least one tube (66) for passing a string yarn (10, 12), extending both in first openings (40?) formed in the inner frame and in second openings (42?) formed in the outer frame.

Abstract: A shock and vibration attenuating device is inserted into or attached to the stroke portion of sports equipment and provided with a chamber carrier and mass particles dispersed in one or more chambers formed into the chamber carrier. The inner surface of the chambers and the mass particles are coated with an electrically conductive material layer to prevent the particles from clinging together or clinging to the inner surface of the chambers, so that the particles are able to move freely within the chambers to attenuate the shock and vibrations of the sports equipment caused by reacting-force during stroke.

Abstract: An improved racquet handle, such as for a tennis or racquetball racquet, comprised of one or more flexible insert devices that add flexibility to said handle and create one or more pivot points along said handle. The increased flexibility of the racquet handle enables a user to impart greater force on a ball, such as a tennis ball, and also dampens or reduces the amount of vibration and/or shock otherwise imparted to the racquet user when the racquet strikes the ball. The structure of the improved racquet handle and the insert device(s) also permit the user to use the improved racquet handle with a plurality of interchangeable racquet heads.

Abstract: A racket capable of being changed in its weight includes handle, a main body, at least one nut embedded in the main body, and at least one bolt threadedly engaged with the nut. The main body has a frame and a connection portion connected between the frame and the handle. Because bolts having different weights can be selectively used to be threaded into the nuts, the user can adjust the overall weight of the racket according to his/her need so as to have a suitable racket.

Abstract: A transaction product includes a paddle, a string, a ball, and an account identifier. The paddle defines an enlarged portion and an elongated handle extending from the enlarged portion. The paddle is formed as a single piece of material. The string defines a first end and a second end opposite the first end. The first end of the string is coupled to the paddle. The ball is coupled to the second end of the string and is configured to bounce on the paddle. The account identifier is statically connected to the paddle and links the paddle to at least one of an account and a record and is machine readable by a point-of-sale terminal.

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: The present application relates to devices and methods for adjusting the weight of a racket using variably weighted racket damping devices.

Abstract: A racket frame 2 includes a body 4 and a first vibration-damping portion 6 fixed to the body 4. The body 4 includes a head 8, a shaft 12, a pair of throats 10 extending from the head 8 to the shaft 12, and a grip 14 connected to the shaft 12. The body 4 includes a second vibration-damping portion 18, and the material of the second vibration-damping portion 18 is different from the material of the first vibration-damping portion 6. The ratio (R2/R4) of a side pressure rigidity R2 to a throat rigidity R4 is 0.26 or greater, a moment of inertia around an axis at a position of 10 cm from a grip end is less than 300 kg·cm2, and a vibration damping rate in an out-of-plane secondary mode is equal to or greater than 0.70 but equal to or less than 1.0.

Abstract: A tennis racket includes a frame that surrounds a hitting face for hitting a ball, wherein a foam material is provided inside two side portions of the frame on opposite sides of a predetermined area of the hitting face, and the two side portions of the frame have a strength that is higher than a strength of another portion of the frame.

Abstract: A racket frame 2 includes a body 4 and a first vibration-damping portion 6 fixed to the body 4. The body 4 includes a head 8, a shaft 12, a pair of throats 10 extending from the head 8 to the shaft 12, and a grip 14 connected to the shaft 12. The body 4 includes a second vibration-damping portion 18, and the material of the second vibration-damping portion 18 is different from the material of the first vibration-damping portion 6. The ratio (R2/R4) of a side pressure rigidity R2 to a throat rigidity R4 is 0.26 or greater, a moment of inertia around an axis at a position of 10 cm from a grip end is less than 300 kg·cm2, and a vibration damping rate in an out-of-plane secondary mode is equal to or greater than 0.70 but equal to or less than 1.0.

Abstract: The invention relates to a racket for ball games, in particular a tennis or squash racket, comprising a head region for receiving a stringing as well as at least one joint which is provided in the head region and the joint axis of which is arranged essentially perpendicularly with respect to a stringing plane formed by the stringing.

Abstract: During use of a golf club, the impact of the head of the club with a ball causes complex vibrations in the handle that are uncomfortable for the user and may adversely affect the force applied to and energy transferred to the ball. The invention aims to mitigate this problem by providing an end piece attached to an end of a shaft of the golf club thereby defining a tapered termination for an air column defined by said shaft.

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: Provided is a shaped body for production of sports equipment such as tennis, squash, and badminton rackets, golf clubs, hockey and ice hockey sticks and baseball bats. The shaped body includes a core of two tubular resonant bodies, running parallel to and spaced at a distance from each other and surrounded by a common covering. A spacer body with convexly curved opposed ends is arranged between the resonant bodies, whereby the mass of the resonant bodies is greater than that of the spacer body. The vibrations of the two vibrating systems, in the form of the resonance bodies, are overlaid in an advantageous manner, by means of the coupling of the resonance bodies. The invention further relates to a method for the production of the shaped body and the use of the shaped body in sports equipment.

Abstract: The disclosure relates to a racket for ball games, and in particular, a tennis or squash racket, with a head region for receiving a stringing defining a stringing plane, a grip portion for holding the racket, and a heart region wherein the heart region has two arms and a bridge. The bridge may be pivot-mounted on both arms relative to an axis substantially perpendicular to the stringing plane. The present disclosure further relates to a method for manufacturing a racket including the step of manufacturing a racket frame with a head region, two arms, and a grip portion in a blow molding process. The method may also include manufacturing a bridge for a racket frame in the blow molding process. The method may further include connecting the bridge with the remaining racket frame.

Abstract: A racket for ball games may include 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 that are symmetrical relative to the longitudinal axis of the racket may be provided in the heart region of the frame. A vibrating device may be arranged in each of the two indentations. The vibrating means of the racket may preferably be effective for vibrations having at least two vibration modes or degrees of freedom. Additionally or alternatively, a racket for ball games may include a frame which forms a head region for receiving strings and a handle portion for holding the racket. The frame may include one respective inwardly-facing C-profile in at least two segments of the head region.

Abstract: In one embodiment of the present invention, an article that generally consists of a silicone material in combination with a fastening member, such as an adhesive backing, is provided and configured for easy application to a surface, including those associated with a variety of racquet sports, sporting goods, etc. The combination of the silicone material with the fastening member is hereby referred to as a “silicone adhesive product” that, as described below, overcomes the deficiencies of conventional sports equipment accessories, protects the sports equipment, reduces vibration; and can offer the degree of customization desired by some sports participants.

Abstract: The present invention is intended for use as a game racket including a handle and a head frame with strings held in tension. In particular as a high performance game racket frame including at least one generally tubular, substantially circular pivot element located at least partially within a substantially circular mating recess on at least one portion of an outside-facing peripheral surface of the head frame profile that can rotate to cooperate with at least one string. The pivot element can rest upon at least a portion of the mating recess and therefore can have at least one adjoining surface portion. In order to reduce friction, adjoining surface(s) can be coated with a suitable anti-friction agent such as silicone or it can include a “frictionless” repelling permanent magnet portion capable of sustaining magnetic levitation between the two parts.

Abstract: A game racket frame is provided including at least one substantially fluid tight portion. The racket includes a handle and a head frame with strings laced through and held in tension to form a stringed hitting surface. Alternatively, the game racket of the present invention could be formed of at least one substantially fluid tight part including a handle portion and a head frame portion. The head frame includes at least one substantially fluid tight portion and has at least one unitary multi-component spring suspension module disposed on its periphery to cooperate with at least one string. The profile of the generally tubular, spring suspension module is formed by at least two components, having at least one common wall. The profile includes a first side portion and a second side portion, is closed on at least two ends, and can have at least one communicating means in common with the racket.

Abstract: A tennis racket includes a frame that includes a shaft and a looped frame portion, the shaft having a grip formed on one end side thereof, the frame portion being joined to the other end side of the shaft and forming a hitting face with a string being strung across and a plurality of insertion holes that provide communication between an inner peripheral side surface and an outer peripheral side surface of the frame portion and through which the string is inserted. Shock absorbing portions and hard portions are provided in an alternating fashion on at least a part of the outer peripheral side surface of the frame portion. Each shock absorbing portion is formed between insertion holes that are adjacent to each other. Each hard portion is formed between insertion holes that are adjacent to each other and is less elastically deformable than the shock absorbing portion.

Abstract: A racket including a string-stretching part for forming a ball-hitting face by tensionally mounting strings in string holes, formed through the string-stretching part, in which grommets are mounted respectively. As the grommets, a double-tubular grommet is mounted in at least one of the string holes. The double-tubular grommet is formed as an integrally molded article, including an inner tubular portion having a string insertion hole through which the string is inserted with the string in contact with the string insertion hole and pulled from an inward-end open portion thereof or an outward-end open portion thereof; an outer tubular portion fitted in the string hole formed through the string-stretching part with the outer tubular portion spaced at a certain interval from the inner tubular portion; and a base portion integrally connected with an outward-side end of the inner tubular portion and that of the outer tubular portion and disposed on a peripheral surface of the string-stretching part.

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: In one embodiment of the present invention, an article that generally consists of a silicone material in combination with a fastening member, such as an adhesive backing, is provided and configured for easy application to a surface, including those associated with a variety of racquet sports, sporting goods, etc. The combination of the silicone material with the fastening member is hereby referred to as a “silicone adhesive product” that, as described below, overcomes the deficiencies of conventional sports equipment accessories, protects the sports equipment, reduces vibration; and can offer the degree of customization desired by some sports participants.

Abstract: A game racket frame is provided including at least one substantially fluid tight portion. The racket includes a handle and a head frame with strings laced through and held in tension to form a stringed hitting surface. Alternatively, the game racket of the present invention could be formed of at least one substantially fluid tight part including a handle portion and a head frame portion. The head frame includes at least one substantially fluid tight portion and has at least one unitary multi-component spring suspension module disposed on its periphery to cooperate with at least one string. The profile of the generally tubular, spring suspension module is formed by at least two components, having at least one common wall. The profile includes a first side portion and a second side portion, is closed on at least two ends, and can have at least one communicating means in common with the racket.

Abstract: A composite formed by a reinforced elastomer material that dissipates, isolates, and absorbs sound and vibrational energy waves.

Abstract: A safety racket includes a head frame, a handle, a connecting portion, several nail members and a string. The head frame has a plurality of through holes. The connecting portion connects between the head frame and the handle. The nail members each have a head and at least one body extending along an axial direction from the head and inserted into the through hole. The body of the nail member has a distal end protruding from the through hole, and a lateral hole positioned at the distal end and extending along a direction substantially perpendicular to the axial direction. The string passes through the lateral hole and interweaved to form a net surface. Since the string is not exposed outside the head frame, the string is well protected to avoid damaging by external objects. The racket also has excellent shock-absorbing effect due to elastic material, such as rubber and plastic, adopted by the nail members.

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: In a ball sport racquet, for example, a tennis racquet, made up of a main or racquet head frame, a throat with a throat bridge and side bridges diverging to the throat bridge and extending into a shaft, and strings fastened on the main frame and on the throat bridge, the throat bridge can move restrictedly relative to the main frame at least in one axis direction perpendicular to the plane of the strings and/or can rotate on the racquet frame on an axis extending in the direction of a longitudinal axis of the racquet.

Abstract: A tennis racket having a racket frame defining a ball-hitting face, wherein if the upper part of the ball-hitting face is set as a 0-degree position, a string protection member is mounted on at least one portion of a head part of the racket frame in a range from a clockwise 45-degree position to a clockwise 135-degree position and in a range from a clockwise 225-degree position to a clockwise 315-degree position by interposing a viscoelastic member between the string protection member and the racket frame. The moment (Is) of inertia of the tennis racket in a swing direction is set to not less than 450,000 g/cm2 nor more than 490,000 g/cm2, when strings are not tensionally mounted thereon. The moment (Ic) of inertia of the tennis racket in a center direction is set to not less than 15,000 g/cm2 nor more than 19,000 g/cm2, when the strings are not tensionally mounted thereon.

Abstract: A racket frame including a grip part, a shaft part, a throat part, and a head part formed hollowly with a fiber reinforced resin and having a weight not less than 100 g nor more than 270 g. The racket frame is provided with a dynamic damper comprising a mass member and a viscoelastic member mounted on a part of a peripheral surface of the mass member. The dynamic damper is mounted inside the grip part by fixing the viscoelastic member to a position of an inner wall of the grip part located within a range of 0.2 L from a free end of the grip part, supposing that a whole length of the racket frame is L in such a way that inside the grip part, at least one part of the mass member is shakable with respect to the inner wall of the grip part.

Abstract: According to one embodiment of the invention, a sports racket includes a racket frame comprising a head portion, handle portion and a throat portion joining the head portion to the handle portion. The racket frame also comprises a self-powered piezoelectric damping system for damping vibrations of the racket during play. The self-powered piezoelectric damping system comprises at least one transducer laminated to the racket and at least one circuit located within the racket handle portion and electrically connected to the at least one transducer.

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: The present invention relates to a racket, in particular a tennis racket or squash racket having a particularly suitable dampening behavior. For this purpose, the ball game racket of the present invention comprises a racket head, a heart region and a handle portion which together form a frame, wherein in the region of the handle portion and/or in the region of the transition between handle portion and heart region a dampening means consisting of a front and/or a rear dampening element is arranged.

Abstract: A ball game racket, especially a tennis racket, has a racket head formed by a tension frame with stringing, and a handle unit formed by a handle shaft or a racket neck joining the tension frame for example via a heart piece. Between a frame profile and the support profile a hose or cushion-type element is filled with an attenuating or damping liquid.

Abstract: A racket includes a head and a shaft, a throat is connected between the head and the shaft. Shock absorbing members are installed to desired positions of the racket so as to reduce impact transferred to the player's hand. Two throat extensions extend from the head and two shaft extensions extend from an end of shaft. Each shaft extension has an insertion. The shock absorbing members are mounted onto the insertions and sandwiched between the throat extension and the insertions. A section of the shock absorbing members extends from an opening of the throat extensions and overlaps on an outer surface of the shaft extensions.

Abstract: The present invention relates to a racket for ball games, in particular a tennis racket, squash racket, badminton racket, racquet ball racket or paddle tennis racket comprising a frame consisting of a racket head and a handle portion connected thereto and being formed of a hollow profile. The hollow profile is formed by winding a plurality of web-like layers. On the racket head and/or in the heart region, the racket comprises at least one dampening layer being wrapped between the layers forming the hollow profile. The racket thus exhibits excellent dampening characteristics and can effectively minimize shock and/or vibration.

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: According to one embodiment of the invention, a sports racket includes a racket frame comprising a head portion, handle portion and a throat portion joining the head portion to the handle portion. The racket frame also comprises a self-powered piezoelectric damping system for damping vibrations of the racket during play. The self-powered piezoelectric damping system comprises at least one transducer laminated to the racket and at least one circuit located within the racket handle portion and electrically connected to the at least one transducer.

Abstract: A compound spring element for a game racket frame is provided. A resilient casing forms the spring element, with its profile having a first side portion and a second side portion defining at least one space between them. The at least one space contains at least one damping and/or tension element which interacts with the casing to form a semi-rigid, damped, compound structural unit that is flexurally resistant to string tension. It can be disposed in any number of advantageous positions on at least one part of a head frame to cooperate with at least one string.

Abstract: A sequential vibration preventer for a ball hitting implement in which impact vibration that is generated when a ball is hit is transmitted to the human body from the impact generation source via the ball hitting implement. The sequential vibration preventer is detachably mounted on a portion of the implement where the vibration amplitude is large, such as the frame shaft or grip, so that the impact vibration is attenuated, and injury to the body is prevented. A ring body consisting of a soft material that has extendability or viscoelasticity is provided, and a plurality of vibrators are sequentially embedded in the circumferential direction in a single ring configuration or in a multiple ring configuration in the interior of the ring body.

Abstract: A racket includes a frame having a rim and a connection portion at an end of the rim, a handle fixed at a distal end of the connection portion, an elastic member attached on a predetermined portion of the frame, and a cover layer wrapped around the frame and the elastic member. The vibration wave transmission velocities of the frame, the elastic member and the cover layer are different from one another and the vibration is therefore reduced while transmitting therethrough.

Abstract: A bumper guard for attachment to a sports racquet. The sports racquet includes a frame having a head portion with an outer peripheral surface and a plurality of grommet holes formed into the head portion for supporting a string bed. The bumper guard includes an elongate body having a first length, an inner surface and an outer surface. The body includes a central region and first and second wings. The central region, when installed on the racquet, is generally centered about a plane defined by the string bed. The first and second wings extend from the central region. The inner surface of the body configured to generally conform with the peripheral outer surface of the head portion. Each of the first and second wings has an inner wall and an outer wall defining at least one elongate hollow cavity.

Abstract: A game racket has a frame having a head portion and a handle portion extending from the head portion. A head cover covers inner and outer frame surfaces of the head portion. At least one elastic panel extends across the inner frame surface of the head portion and is connected to the head cover.

Abstract: A game racquet includes separate head and handle portions which are separated by shock and/or vibration absorbing material. Both the head portion and the handle portion are bonded to the absorbing material and are thereby connected to each other.

Abstract: A sports racquet including a frame, a yoke and a string bed. The frame includes a head portion, a handle portion, and a throat portion positioned between the head and handle portions. The head portion includes an upper region, and first and second side regions. The yoke is coupled to the first and second side regions. The head portion and the yoke define a string bed area. The string bed is formed of a number of cross and main string segments. The main string segments include at least one central main string segment and at least two peripheral main string segments. Each central main string segment has first and second ends wherein the first end engages the head portion and the second end engages the yoke. Each peripheral main string segment is coupled at a proximal end to at least one of the throat portion and the handle portion.

Abstract: A game racquet includes separate head and handle portions which are separated by shock and/or vibration absorbing material. Both the head portion and the handle portion are bonded to the absorbing material and are thereby connected to each other.

Abstract: An embedded dynamic vibration absorber that includes an external structural portion and a vibrational absorbing portion. The vibrational absorbing portion is encompassed or surrounded by the external structural portion.