The invention relates to a play device intended for juggling, comprising upper branches, and lower branches, an upper linking part, and a lower linking part, the upper and lower linking parts being aligned along a main axis, and a peripheral armature, of annular shape arranged between the upper linking part and the lower linking part along the main axis, said upper branches and lower branches forming an external envelope delimiting an interior space of the play device and being configured to deform in such a way that the device passes from an initial shape to a bowed shape when a user bounces the play device on his body, and from the bowed shape to the initial shape after the bounce.

The invention relates to a play device intended for juggling, comprising upper branches, and lower branches, an upper linking part, and a lower linking part, the upper and lower linking parts being aligned along a main axis, and a peripheral armature, of annular shape arranged between the upper linking part and the lower linking part along the main axis, said upper branches and lower branches forming an external envelope delimiting an interior space of the play device and being configured to deform in such a way that the device passes from an initial shape to a bowed shape when a user bounces the play device on his body, and from the bowed shape to the initial shape after the bounce.

In the process of making a hollow product, especially a deformable toy ball, two halves made from on 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 on 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 polyhedral substantially cube-shaped training aid approximately the size and weight of a basketball and having a side transition, whereby when the training aid is launched in the manner of a basketball shot the rotation of the training aid provides visual feedback representative of a nature of the rotation of the device in flight. The training aid may include a level indicator device, sound indicator, vibration indicator, and side transitions are generally beveled. The training aid may include visual outer-markings on one or more external surfaces of the aid to visually indicate the nature of the rotation of the device when launched. Alternatively, the training aid is removably placed over the outside surface of a basketball so as to at least partially square off a first perspective of the basketball, the training aid being configured and constructed of material that permits the training aid to become removably affixed to the outer surface of the basketball.

A tennis ball comprises a hollow elastic circumferential core defining a primary outer surface pattern, and a textile outer layer extending over and about the core.

The present invention relates to a device for training and correcting table tennis strokes. The invention comprises: a physical pendulum assembly (20), pendulum axel/pivot assembly (30), ball/axel assembly (50), serve practice assembly (40), table tennis ball/axel assembly (50), mounting bracket/clamp assembly (70) and mounting member 60a. The table tennis training device allows a user to develop their table tennis strokes by tangentially striking the table tennis ball of table tennis ball/axel assembly (50), or by rotating physical pendulum assembly (20) approximately 180 degrees and striking a user supplied table tennis ball off of table tennis ball tee (20j). The invention also allows a user to removably secure either, table tennis ball/axel assembly (50), or the table tennis ball tee (20j) into the unattached end of serve practice assembly (40) in order to practice striking a table tennis ball at various heights above a table tennis table.

A data-collecting play object. The play object includes a body manipulated by a player. A data-collecting unit is disposed in the interior of the body. The data-collecting unit includes an accelerometer unit measuring acceleration values along at least one translational degree of freedom, a gyroscope unit measuring rotation values about at least one rotational degree of freedom, and a processor in communication with the accelerometer unit and with the gyroscope unit. The processor obtains the acceleration values from the accelerometer unit and the rotation values from the gyroscope unit. The processor wirelessly transmits the acceleration and rotation values at discrete intervals. A power source supplies electrical power to the accelerometer unit, the gyroscope unit, and the processor. The play object being used in combination with an identification tag attached to a play accessory is also disclosed. A system and a method are also disclosed.

A data-collecting play object. The play object includes a body manipulated by a player. A data-collecting unit is disposed in the interior of the body. The data-collecting unit includes an accelerometer unit measuring acceleration values along at least one translational degree of freedom, a gyroscope unit measuring rotation values about at least one rotational degree of freedom, and a processor in communication with the accelerometer unit and with the gyroscope unit. The processor obtains the acceleration values from the accelerometer unit and the rotation values from the gyroscope unit. The processor wirelessly transmits the acceleration and rotation values at discrete intervals. A power source supplies electrical power to the accelerometer unit, the gyroscope unit, and the processor. The play object being used in combination with an identification tag attached to a play accessory is also disclosed. A system and a method are also disclosed.

A tennis ball may include a spherical hollow core having an inner surface including material shift lines and a textile outer layer over and about the core.