A rubber composition for a hollow ball includes a base rubber and an inorganic filler. A weight reduction rate TGA.sub.650 from room temperature to 650° C. and a weight reduction rate TGA.sub.850 from room temperature to 850° C. of the rubber composition are measured under an air atmosphere by thermogravimetry conforming to JIS K0129. The weight reduction rate TGA.sub.650 of the rubber composition is not less than 63% and not greater than 99%. A difference (TGA.sub.850−TGA.sub.650) between the weight reduction rates TGA.sub.850 and TGA.sub.650 of the rubber composition is not less than 0% and not greater than 7%. A hollow ball 2 includes a hollow core 4 formed from the rubber composition.

The present disclosure provides a stress-relief folding ball, including a folding ball main body capable of extending and shrinking, wherein the folding ball main body includes a folding matrix, folding lines, folding walls, pressing spherical surfaces and an accommodating cavity; the folding matrix is arranged in a middle of the folding ball main body, the folding lines and the folding walls are arranged at left and right sides of the folding matrix, the folding lines and the folding walls are alternately connected, the pressing spherical surfaces are arranged at left and right ends of the folding ball main body. The folding ball main body provided by the present disclosure is an integrally formed structure and not easy to be damaged, thereby reducing the purchasing cost. The selected material is the non-metal elastic material, which may increase the comfort and enjoyment during use.

In the process of making a hollow product, especially a deformable toy ball, two halves made from an elastomeric material, a thermoplastic material, rubber, a blend of rubbers, or a thermoplastic elastomer are formed by injection molding with mating edges that engage with each other when the halves are assembled to form the product. The edge of one of the two halves is advantageously formed with a recess centered in the edge, in which a flange formed on the edge of the other of the two halves engages to provide a form-fitting connection between the two halves. The opposing edges are then bonded with each other by fusion or melting or by an adhesive applied to at least one of the edges prior to assembling the halves together. A deformable ball produced by the process is also described.

In the process of making a hollow product, especially a deformable toy ball, two halves made from an elastomeric material, a thermoplastic material, rubber, a blend of rubbers, or a thermoplastic elastomer are formed by injection molding with mating edges that engage with each other when the halves are assembled to form the product. The edge of one of the two halves is advantageously formed with a recess centered in the edge, in which a flange formed on the edge of the other of the two halves engages to provide a form-fitting connection between the two halves. The opposing edges are then bonded with each other by fusion or melting or by an adhesive applied to at least one of the edges prior to assembling the halves together. A deformable ball produced by the process is also described.

A ball toss and retrieval toy provides for entertainment and exercise by children. The toy takes the form of a bat and has an open end for tossing the ball from the toy. The toy also has a cord and reel mechanism that attaches the ball to the bat, allowing for retrieval of the ball from a fixed position. The reel mechanism includes a release mechanism that allows the cord to play out as the toy is operated in a toss operation similar to a fishing casting operation. The ball can then be reeled in by the reel mechanism, which may include a mechanical crank or may be motorized.

A plastic ball having a generally spherical shape with a plurality of depressions located in only one hemisphere of the ball and lying along circumferences of the ball that pass through the center of the hemisphere, in which the depressions are equally spaced radially about the center of the hemisphere.

A hollow plastic ball includes two semi-spherical shells combined together. Each of the two semi-spherical shells has a surface provided with a plurality of holes and has an inner circumferential face provided with a horizontal rib and a semi-circular vertical rib. Thus, each of the two semi-spherical shells is provided with the horizontal rib and the semi-circular vertical rib, so that the hollow plastic ball will not move or sway freely during flight. In addition, the horizontal rib and the vertical rib of each of the two semi-spherical shells reinforce the structural strength of the hollow plastic ball to prevent the hollow plastic ball from being deformed.

A hollow plastic ball includes two semi-spherical shells combined together. Each of the two semi-spherical shells has a surface provided with a plurality of holes and has an inner circumferential face provided with a horizontal rib and a semi-circular vertical rib. Thus, each of the two semi-spherical shells is provided with the horizontal rib and the semi-circular vertical rib, so that the hollow plastic ball will not move or sway freely during flight. In addition, the horizontal rib and the vertical rib of each of the two semi-spherical shells reinforce the structural strength of the hollow plastic ball to prevent the hollow plastic ball from being deformed.

An apparatus is used with throwable implements. The apparatus includes a base having a central portion and a peripheral edge. A first container is positioned on the central portion of the base. A plurality of second containers is positioned along the peripheral edge of the base and radially about the first container, wherein the plurality of second containers are smaller than the first container, and wherein an upper rim edge of the first container is positioned higher than upper rim edges of the plurality of second containers. The apparatus may be floatable and used primarily in water-based settings.

At least one exemplary embodiment is directed to an earpiece having a balloon and a stent where the balloon is mounted on the stent and the stent incorporates two or more channels including at least an inflation channel and an acoustic channel. In some embodiments the stent is configured to pass audio signals through the acoustic channel where the acoustic channel is independent of the inflation channel of the balloon. Other embodiments are disclosed.