A tennis racket has a tubular member, formed to the racket shape, which defines two tubular paths extending along opposite sides of the handle portion of the racket from approximately the top of the grip completely around the periphery of the string area to the topmost point of the head. Within each tubular path is a plurality of weights. Fixed at the topmost point of each tubular path is a coiled spring which maintains the weights in the lowermost portion of each tubular path, but whose force is overcome by the weights under the centrifugal force of the swing so that the two sets of weights move upwardly to the sides of the racket head.
A sporting implement and more specifically, a racket. The racket has a frame connected to a handle and a tubular member disposed about the frame and handle. A liquid refrigerant located in the tubular member serves to dissipate heat generated by the user's hand. The tubular member has portions which define an evaporator and a condenser such that heat from the user's hand evaporates the refrigerant and the evaporated refrigerant travels to the condensing area where it changes back to a liquid state.
Sports equipment for ball games comprising a stroke portion and a shaft portion including a grip, in particular a tennis racket or a golf club, wherein mass particles are integrated into the equipment structure which are freely displaceable or freely movable thereto and which are provided in one or a plurality of chamber(s) the volume of each of said chambers being small relative to the interior volume of the stroke and/or the shaft portion. The stroke characteristics of the sports equipment can be variied depending from the distribution of the chambers within the structure and/or from the amount of the mass particles used. Stroke shocks are attenuated with the result that occurrence of "tennis elbow" is diminished.
A ball-game racket, in particular a tennis racket, having a racket head consisting of a tension frame and netting and having a shaft (6) with handle extending away from the racket head, has at least one spring-mass system which is provided on one side of a midplane enclosing the longitudinal axis of the shaft and arranged perpendicular to the plane of the netting and has, in a movement channel extending from the handle into the racket head, at least one mass weight which is movable in the longitudinal direction of the channel against the action of a spring element between a starting position in the handle and an end position in the racket head.
A device for reducing torque and vibration caused by an off-center impact between a ball and the face of a racquet. The device includes tubular guide means located about the periphery of the racquet head. Mounted within the tubular guide means are a system of self-adjusting counterbalancing weights. Movement of the racquet by an off-center impact causes the counterbalancing weights to be displaced. The displacement of the weights offsets and balances the torque and vibration of the impact.
A racket for playing tennis or similar ball games has a frame or head portion mounting the web of strings and of generally oval or elliptical configuration and a straight handle co-axial with the major axis of the frame. The frame includes at the lengthwise sides of the frame, that is, adjacent to the minor axis of the frame, spaces within the frame material or in containers attached to said frame sides a plurality of granules such as pellets which are freely movable within said spaces if and when the racket is swung to hit a ball, thereby damping vibrations as are generated when the ball impacts upon the web mounted on the frame. Similar spaces can also be provided in the yoke of the racket and partly filled with pellets also causing damping the vibrations generated by the impact of the ball.
