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 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: 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 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 dynamic damper (10) having a viscoelastic part (12) and a mass-adding part (11) laminated on the viscoelastic part (12). The dynamic damper (10) has a horizontal frame (13) and a vertical frame (14) disposed at both sides of the horizontal frame (13) in such a way that the horizontal frame (13) and the vertical frame (14) continuous with the horizontal frame (13) in the shape of a lattice. The horizontal frame (13) and the vertical frame (14) are integral with each other or separately provided in the shape of a lattice.

Abstract: A racket comprising a frame body having a face portion, a shaft portion, and a grip portion, and a groove in the length of 10% to 20% against the entire circumference of the frame comprising the face portion provided at two portions covering maximum width points of the frame comprising the face portion and a closed tube enclosing a slidable weight weighing 2 g to 10 g is embedded in the groove.

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 tennis racket comprises a frame; a shaft connected to the frame at one end thereof; a grip into which the shaft is inserted at the other end thereof; and a pair of lightweight metal pieces attached to the shaft. The frame and the shaft are formed from fiber-reinforced synthetic resin, the pair of lightweight metal pieces has a U-shaped section and extends from inside the grip at a connecting portion with the shaft and along both sides of the shaft.

Abstract: A shock-absorbing racket body is comprised of the conventional body elements including an elliptical frame, a Y-shaped throat, a shaft and a handle and at least one slit defined one or a combination of the conventional body elements to receive a shock-absorbing device to absorb the reactive force generated when striking a ball. The absorbing device is provided to absorb the reactive force when striking a ball and to damp and attenuate resonant vibration after striking a ball to prevent injury to the player's wrist.

Abstract: A shockproof device in the throat of a tennis racket includes a racket having a frame, a stringing surface in the frame, a throat of truncated triangular configuration under the frame and including a pair of tubular branches spacedly extending downward from the lower peripheries of the frame and a Y-shaped handle including a pair of solid branches spacedly extending upward and each having an elastic sleeve wrapped on inserted into the tubular branches in a predetermined depth and secured by adhesives, and a conical gap centrally formed in the bottom of the frame and filled up by an conical elastic projection of a sheath which wraps the frame. Thereby, the shock waves from the frame are partially hindered and absorbed by the conical elastic projection and partially absorbed by the elastic sleeves in the throat without transmitting to the handle.

Abstract: A new type of ball racket with bumper guard comprises a racket frame, a racket face, a shaft and a handle. The bumper guard is affixed on the curved section of the racket frame, which surrounds the ball racket face having a plurality of holes on the ball-hitting area, and then two sides of the frame converge to form the shaft. The end of the shaft has a handle. The design of the ball racket with bumper guard can protect the racket frame from many scratches and bumps against the wall or the ground during ball play. This not only can help extend the service life of a normal racket, but also reduces the chance of wrist injury for players.

Abstract: A shock-absorbing racket body is comprised of the conventional body elements including an elliptical frame, a Y-shaped throat, a shaft and a handle and at least one slit defined one or a combination of the conventional body elements to receive a shock-absorbing device to absorb the reactive force generated when striking a ball. The absorbing device is provided to absorb the reactive force when striking a ball and to damp and attenuate resonant vibration after striking a ball to prevent injury to the player's wrist.

Abstract: Elastic sheath dampers in tennis racket throat include a racket having a frame, a stringing surface in the frame and a throat separated from a handle to respectively form a truncated triangular configuration and a Y-shaped configuration each of which has a pair of hollow interior branches made engageable with each other and connected by a pair of cylindrical bars by adhesives respectively. The cylindrical bars each has a pair of elastic sheaths respectively sleeved on two ends and inserted into the branches. Thereby the shock waves from the frame are absorbed twice by the elastic sheaths in the throat without transmitting to the handle.

Abstract: A game racquet includes a head portion and a pair of removable handle portions. The head portion is adapted to support racquet strings and includes a pair of side portions which curve downwardly and inwardly at the bottom of the head. Each handle portion includes a substantially straight bottom portion and a curved top portion which is frictionally engaged with, and removable from, one of the side portions of the hoop. Dampening or resilient material is positioned between the frictionally engaged portions of the side portions and the handle portions.

Abstract: This invention refers to a novel ballgame racket, especially a tennis racket, including a racket head formed by a tension frame with stringing, and also having a grip portion joining the tension frame, for example by means of a crossing and formed by a gripping shaft or a racket neck and a handle. The racket has a mechanism for tensioning the strings which includes a two part tension frame of the racket head. The frame has a closed hollow profile with a second wing like profile in touch with the closed profile with a damping element placed therebetween.

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 cushion for handle of racket comprises, from bottom to top, a fabric layer, a permeable layer, and a smooth flat waterproof layer. The permeable layer has a flat bottom surface and an undulating top surface wherein the raised portions of the top surface of the permeable layer project above the waterproof layer to form a plurality of absorption irregular areas for absorbing sweat and heat given forth from hand when holding the racket. Further, absorption areas has a high frictional coefficient. This can increase the grasping force of the hand of user on racket.

Abstract: The invention is an improved sports racket comprising streamlined transversal strings and streamlined longitudinal strings with surface indentations that permit the strings to lock into other at the string crossings so the strings do not move with respect to each other and also stay oriented so as to minimize wind resistance during the swinging motion of the sports racket before and after ball contact. The invention includes a spacer for assembly of the strings in the sports racket incorporating a flexible body between the string and the racket frame for the absorption and restitution of part of the ball's kinetic energy during impact with the string to beneficially alter the feel of the strings.

Abstract: A racket includes a frame, at least one string and a particular portion The frame includes a handle portion and a head portion. The string is connected to the frame to provide a string tension. The particular portion is composed of a non-fluid material and disposed on the frame. The particular portion cooperates with the at least one string and is designed to reduce the string tension of the string upon a deflection of the string. The particular portion compresses when the string tension of the at least one string increases.

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 golf club includes an electroactive assembly attached to the club and electrically tuned to capture energy from one or more vibrational modes with high efficiency. More generally, a sports implement includes an electroactive element, such as a piezoceramic sheet attached to the implement, and a circuit attached to the electroactive element. The circuit may be a shunt, or may include processing such as amplification and phase control to apply a driving signal which may compensate for strain sensed in the implement, or may simply alter the stiffness to affect performance. The electroactive element is located in a region of high strain to apply damping, and may include plural subassemblies mounted to capture energy in different planes, or to capture an asymmetric strain distribution while maintaining structural symmetry. In a ski the element captures between about one and five percent of the strain energy of the ski.

Abstract: A sport racket includes a neck and a handle. The neck has an outer tapered wall provided with an outer bottom formed with the outer tapered wall; and an inner tapered wall provided with an inner bottom formed with the inner tapered wall. The handle has a tapered wall defining an open chamber to receive the outer bottom of the neck; an elastomer securely abutting a bottom defining the chamber; and a threaded bolt extending through the inner bottom, the outer bottom, the bottom of the chamber and the elastomer to screw into a nut.

Abstract: A sport racket includes a head with a shank extending therefrom and a connection section extends from the shank. A shock absorbing sleeve is mounted to the connection section and a handle is mounted to the sleeve.

Abstract: A racket includes a frame in which through-holes are made, shank carrying cleats including a pair of shanks which are engaged in the holes, and a stringing mounted on the frame by threading through the shank-carrying cleats, so as to produce a string pattern within the frame. The shank carrying cleats contact the frame between the through-holes. Each cleat has at least one bearing surface which is located between each pair of adjacent shanks and on which a stringing loop bears. At least some of the bearing surfaces include gaps located between the bearing surfaces and the frame.

Abstract: A tennis racket including a vibration damping member located in the vicinity of a position of a racket frame at which a large amplitude is generated when the tennis racket hits a tennis ball. The vibration damping member includes a mass adding part, such as a bracket assembly, having a portion extending in a widthwise direction of the tennis racket and a portion extending in a thickness direction thereof such that both portions are either integral or unintegral with each other; a viscoelastic material; a spring; or/and a damper each for connecting the mass adding part to the racket frame. The vibration damping member absorbs a vibration in an in-plane and an out-of-plane direction of the racket frame, and longitudinal and rotational impacts to be applied to a handle portion of the tennis racket.

Abstract: A multi-mode vibration absorbing device for implements includes a base member and a mass mounted to the base member and cantilevered relative thereto. The multi-mode vibration absorbing device is tuned such that it vibrates at the same frequency as the implement but out of phase therewith.

Abstract: In a ball-game racket, especially a tennis racket, with a racket head formed by a clamping frame with stringing and with a grip shaft that attaches via, for example, a core piece, a damping element is located on the racket that has at least one additional weight and is elastically mounted with gaps between it and all adjacent walls.

Abstract: In the field of golf equipment, a new shaft design incorporates passive damping to suppress the vibrations excited in the shaft before and after impact. The design comprises a viscoelastic material sandwiched between multiple layers of composite plies which induce large shear strains in the viscoelastic when the shaft is subjected to bending, extension, or twist, thus increasing damping losses over conventional golf shafts. In one embodiment, the sandwiching layers are of opposing orientation. In another embodiment, the layers are oriented in an opposing V-shape laminate.

Abstract: The invention is an improved sports racket comprising streamlined transversal strings and streamlined longitudinal strings with surface indentations that permit the strings to lock into each other at the string crossings so the strings do not move with respect to each other and also stay oriented so as to minimize wind resitance during the swinging motion of the sports racket before and after ball contact. The invention includes fixing means for assembly of the strings in the sports racket.

Abstract: A shock-absorbing device is designed for use in ballgame goods having a tubular rod-shaped body and is composed of a tubular body and a weight. The tubular body is made of a soft elastic material. The weight is disposed in the tubular body such that weight is connected with the tubular body, and that an interstice is located between the outer surface of the weight and the inner wall of the tubular body so as to enable the weight to vibrate in the tubular body. The tubular body of the shock-absorbing device is disposed in the inner wall of the tubular rod-shaped body of the ballgame goods. The tubular body is capable of absorbing shock wave of the ballgame goods. The vibrational motion of the weight is capable of canceling shock wave of the ballgame goods.

Abstract: A vibration damper device for a sports striking instrument having a striking surface and a handle, the device being mounted on the free end of the instrument handle in the vicinity of a vibration antinode and comprising an oscillating mass, in which the oscillating mass is included in a cavity of a flexible cap surrounding the end of the handle, said mass being at a distance from said end.

Abstract: A multi-mode vibration absorbing device for implements includes a base member and a mass mounted to the base member and cantilevered relative thereto. The multi-mode vibration absorbing device is tuned such that it vibrates at the same frequency as the implement but out of phase therewith.

Abstract: A tennis racket with handle and head coupled with an interconnection insert provides torsional elasticity and vibration damping. The racket handle has a mating extension extending toward the head and the head includes a mating extension extending toward the handle such that the handle and head mate together at the mating extensions. The handle extension has a tongue with two bores and a pair of elastic bushings extending through bores. The head mating extension comprises a recess or U-shaped channel which receives the tongue and includes a pair of securing pins extending through the bushings and being rigidly secured to the sides of the recess or channel. The bushings and pins are positioned transverse to the longitudinal extent of the handle and parallel to the racket face. The bushings perform a shock absorbing function, provide torsional elasticity and control the racket stiffness.

Abstract: A sports implement including an electroactive element, such as a piezoceramic sheet attached to the implement and a circuit attached to the electroactive element. The circuit may be a shunt, or may include processing such as amplification and phase control to apply a driving signal which may compensate for strain sensed in the implement, or may simply alter the stiffness to affect performance. In a ski, the electroactive element is located near to the root in a region of high strain to apply damping, and the element captures between about one and five percent of the strain energy of the ski. The region of high strain may be found by modeling mechanics of the sports implement, or may be located by empirically mapping the strain distribution which occurs during use of the implement. In other embodiments, the electroactive elements may remove resonances, adapt performance to different situations, or enhance handling or comfort of the implement.

Abstract: An implement grip having a built-in shock absorber. The shock absorber may have a coiled configuration or interspersed coils. Implements range from sports equipment such as golf clubs, tennis rackets, and baseball bats to tools such as hammers.

Abstract: A shock-absorbing device for rackets includes a first clamping plate having at least one first hole defined therein and a second clamping plate having at least one hole defined therein. The first and second clamping plates are respectively mounted to two sides of a plurality of strings of a racket with the first hole aligning with the associated second hole. A retaining device extends through the first hole and the associated second hole for securely holding the first and the second clamping plates together.

Abstract: This invention relates to an improvement in a split bridge sports racket having a frame with a rim and a handle, the rim being formed with string tunnels through which the string extends to form an impact surface, the handle having a Y configuration, the arms of which merge with the rim to define a bridge section of the rim that extends between the ends of the arms of the Y configuration, the bridge having a discontinuity, the free ends of the bridge at the discontinuity articulating with a bridge insert to reduce player arm stress in use. The improvement resides in providing a bridge having a length to accommodate at least four central longitudinal string tunnels of the racket with each central longitudinal string tunnel extending in the same direction as their respective longitudinal strings through the said bridge and wherein a support plug is mounted within the hollow of each of the free ends of the bridge to limit the movement of the free ends during play and prevent cracking of the frame from use.

Abstract: In a racket for tennis or the like games having a frame for receiving stringing, comprising a hollow tube, and a handle end, wherein receiving spaces for granules or the like mass particles are associated with the racket, at least one receiving space (40) is arranged at the outside surface (34) of the tube (14), wherein in particular a recess which is formed in the outside (34) of the profile bar (14) and which is covered over serves as the receiving space.

Abstract: A vibration dampened hand held implement such as a ball bat, archery bow or hammer is provided with a vibration dampening system comprising a chamber having a low modulus viscoelastic elastomeric vibration dampening member freely moveable therein to bounce back and forth between and move out of phase with the chamber walls to rapidly dampen unwanted lower frequency vibrations of the implement.

Abstract: A stroke training and exercise device includes a hand-grip portion having the configuration of the handle of a tennis racket, a throat portion similar to a tennis racket, but a much smaller head band within which is secured, either permanently or detachably, a monolithic disk or "head" that selectively incorporates variable weights that cause the device to simulate the weight and balance of various types of tennis rackets.

Abstract: This invention relates to an improved ball striking device, such as a golf club, hockey stick, or tennis racket, in which a greater striking power is imparted to the ball, puck or the like by inserting a connecting elastomeric member between the head or striking portion and the shaft portion of the device. The inherent resilient characteristics of the member allows an enhancement of the forward motion imparted to the ball.

Abstract: A badminton racket comprises a head frame, a gut, a shaft and a grip. The grip comprises a main body and a grip portion having a length of 15.5 centimeters or more. The main body is provided in the interior thereof with a slot extending from the free end of the main body in the direction toward the shaft for reducing the weight of the main body so as to cause the center of gravity to move toward the junction between the shaft and the tapered end of the main body of the grip. The tapered end of the main body is provided with a front jacket which is fitted thereover and is provided with a V-shaped cut for forming a receiving space between the front jacket and the above tapered end of the main body. A shock-absorbing body is received in the receiving space such that the tapered end of the shock-absorbing body and the front jacket form together a tapered end of the grip.

Abstract: In order to provide a racket with strung netting, more particularly a tennis or squash racket, comprising a frame (10) which delimits a striking area (11) formed by strings tautly strung in the frame (10), a handle (14) as well as a connection piece (13) connecting the handle (14) with the frame (10), wherein, within the region of the racket (100), in which the racket (100) undergoes a strong deflection when striking, a resiliently mounted addition material (16) is fitted, in which these undesirable effects are, at low costs, either very largely eliminated or at least substantially reduced and wherein the striking properties are improved at the same time, it is proposed that the addition material (16) be configured in a rod-like fashion, that the addition material be disposed with its rod axis at a right angle to the handle axis and so as to lie in the plane defined by the striking surface (11).