Abstract: A shock absorber or a racket contains: a body and at least two magnetic elements. The body is mounted on strings of the racket and includes an accommodation groove defined therein, the at least two magnetic elements are housed in the accommodation groove of the body, wherein one of the at least two magnetic elements slides in the accommodation groove of the body, and the at least two magnetic elements are fixed at a same magnetic pole and face to each other so that magnetic repulsion produces between the at least two magnetic elements.

Abstract: A device mounted in a tennis racket includes a cylindrical cushioning member including an annular groove, a central chamber, an axial channel crossed the chamber, and two recesses at its both ends; and a rigid, doughnut-shaped, hollow sound producing member mounted in the chamber and including a space and an axial tunnel therethrough. Three straight wires of a network of the racket pass three sides of the groove for fastening the device such that the device can absorb reaction when a ball is hit by the racket. The strength of sound produced by the device is determined by whether air flowing through one recess, one end of the channel, and the tunnel co-acts with air in the space to produce resonance or not by whether a handle held by the hand correctly hits the ball or not. The recess has a concave, convex, or inclined section around its central portion.

Abstract: Provided is an elastomeric shock absorbing device mountable in a racket such as tennis racket. The device comprises a cylindrical first cushioning member including two annular flanges in its top and bottom respectively, an intermediate annular recess, a spherical chamber provided in its center, and a channel in communication between the top flange and the chamber; a plurality of elastomeric balls received in the chamber by putting into the channel; and a ring-shaped second cushioning member including an annular groove, the second cushioning member being adapted to mount around the recess, wherein three straight wires of a network of the racket pass three sides of the groove for fastening the shock absorbing device in an open space of the network. A number of embodiments are possible for the purposes of balance, decreasing reaction, and increasing strength in hitting a ball.

Abstract: Provided is an elastomeric shock absorbing device mountable in a racket such as tennis racket. The device comprises a cylindrical first cushioning member including two annular flanges in its top and bottom respectively, an intermediate annular recess, a spherical chamber provided in its center, and a channel in communication between the top flange and the chamber; a plurality of elastomeric balls received in the chamber by putting into the channel; and a ring-shaped second cushioning member including an annular groove, the second cushioning member being adapted to mount around the recess, wherein three straight wires of a network of the racket pass three sides of the groove for fastening the shock absorbing device in an open space of the network. A number of embodiments are possible for the purposes of balance, decreasing reaction, and increasing strength in hitting a ball.

Abstract: A device comprises an elastomer, and a metal ball which is contained in a cell of the interior of the elastomer. The elastomer is provided in the periphery with one or more slits by which the elastomer is fastened to the strings of a tennis racket. The elastomer in itself is capable of absorbing shock and deadening noise. As the strings of the tennis racket are impacted by a ball, the metal ball is activated by the impact force to vibrate at a high frequency in the cell of the elastomer. The high-frequency vibration of the metal ball serves to absorb shock and deaden noise.

Abstract: A device comprises an elastomer, and a metal ball which is contained in a cell of the interior of the elastomer. The elastomer is provided in the periphery with one or more slits by which the elastomer is fastened to the strings of a tennis racket. The elastomer in itself is capable of absorbing shock and deadening noise. As the strings of the tennis racket are impacted by a ball, the metal ball is activated by the impact force to vibrate at a high frequency in the cell of the elastomer. The high-frequency vibration of the metal ball serves to absorb shock and deaden noise.