A method for forming a tennis ball including the steps of providing a non-foamed thermoplastic core and providing a non-smooth textured surface on the core. The thermoplastic core including a thermoplastic material having a specific gravity of 0.86 to 1.38, a flexural modulus of 2.0 to 50.0 MPa, and a Shore D hardness of 10 to 70. The thermoplastic material having a thickness between 3.0 and 8.0 mm. The thickness of the thermoplastic material being configured to maintain dimensional stability at internal pressures of between zero and 15 psi.

A contained reactive liquid transport apparatus is provided. The transport apparatus comprises a first part and a second part attachable to and detachable from one another, and a ball bearing assembly. The first and second parts each have an outer shell and extend around a common central axis to form a longitudinal chamber that can hold a contained reactive liquid. The ball bearing assembly allows the outer shells to rotate with respect to the longitudinal chamber and a contained reactive liquid held placed therein, thereby minimizing shaking or other agitation to the contained reactive liquid. In one embodiment, the transport apparatus is a combination sports ball and contained carbonated beverage transport apparatus.

Training apparatuses are provided that include a substantially spherical, hollow shell formed from a pair of hemispherical portions. The hemispherical portions may each include an annular peripheral edge having a fastening mechanism, which may be adapted to provide rigidity and structure to the training apparatus. At least one hemispherical portion may further include a number of protrusions extending along an inner surface from the peripheral edge, the protrusions configured to provide structural support and durability to the training apparatus.

Training apparatuses are provided that include a substantially spherical, hollow shell formed from a pair of hemispherical portions. The hemispherical portions may each include an annular peripheral edge having a fastening mechanism, which may be adapted to provide rigidity and structure to the training apparatus. At least one hemispherical portion may further include a number of protrusions extending along an inner surface from the peripheral edge, the protrusions configured to provide structural support and durability to the training apparatus.

A ball, and in particular a baseball or softball, including one or more sensors such as accelerometers and/or inertial measurement units, and systems and methods using the same to improve a pitcher's pitching performance are described herein. In some embodiments, the ball may include one or more inertial measurement units and/or accelerometers capable of monitoring motion of the ball while it is thrown. Once a ball is thrown, in response to the inertial measurement unit(s) and/or accelerometer(s), one or more indicators may be caused to perform an action. For example, one or more user interfaces may be used to display graphs for illustrating a trajectory of a ball after it has been thrown. Various statistics, such as velocity, a change in vertical displacement, a change in horizontal displacement, and a spin rate may also be indicated on the user interface.

A ball, and in particular a baseball or softball, including one or more sensors such as accelerometers and/or inertial measurement units, and systems and methods using the same to improve a pitcher's pitching performance are described herein. In some embodiments, the ball may include one or more inertial measurement units and/or accelerometers capable of monitoring motion of the ball while it is thrown. Once a ball is thrown, in response to the inertial measurement unit(s) and/or accelerometer(s), one or more indicators may be caused to perform an action. For example, one or more user interfaces may be used to display graphs for illustrating a trajectory of a ball after it has been thrown. Various statistics, such as velocity, a change in vertical displacement, a change in horizontal displacement, and a spin rate may also be indicated on the user interface.

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.

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.

A toy ball which emits sounds as it is rolled and including a ball body and a plurality of mechanically-operated sound producing tubes carried within the ball body, each sound producing tube including a sound-producing device which moves by the force of gravity, and each sound producing tube lying along a longitudinal axis, in which the axes are transverse to one another so that the sound producing devices emit sound when the ball is rolled along various axes. The ends of the sound-producing tubes are held by sleeves that are molded as integral parts of the ball body.

Described are a carcass for a sports ball having a textile element, which has at least two segments joined by a seam and defines a shape of the carcass, and wherein the at least two segments and the seam are warp-knitted or weft-knitted in a single piece, and a method of making a carcass for a sports ball.