Principal and secondary regions (106 and 108) of an information-presentation structure extend to an exposed surface (102) respectively at principal and secondary surface zones (112 and 114) variously impacted by a spherical object (104) that rebounds from the surface. The principal region normally appears along the principal zone as a principal color. An impact-dependent portion (138) of the principal region responds to the object impacting the principal zone at an object-contact area (116) by temporarily appearing along a print area (118) of the principal zone as changed color materially different from the principal color. The print area closely matches the object-contact area in size, shape, and location. The secondary region fixedly appears along the secondary zone as a secondary color. Restitution matching is provided across the two zones so that the rebound characteristics of the object are largely independent of whether it contacts the principal or secondary zone.

A device (10) including a deformable shell (12) delimiting an inner space (14), and: a resilient band (18, 30, 32) suspended in the inner space (14) and including two ends secured to the deformable shell (12), said band (18, 30, 32) including a piezoelectric material (30, 32) to generate an electric voltage under the effect of the deformation of the shell (12) and two electrodes for collecting the voltage; and an electronic circuit (34) for processing the voltage, arranged on the resilient band (18, 30, 32) and connected to the electrodes of the resilient band (18, 30, 32).

Methods for determining performance information for an object located within an area include obtaining magnetic field information for the area, measuring first magnetic field data when the object is located at a first position within the area, and determining performance information for the object within the area based on the magnetic field information for the area and the first magnetic field data.

A ball (100) for use in bat and ball games wherein the ball is struck with a bat having an untensioned, rigid ball-striking surface, includes a hollow spherical impact body (112) having a mass of between 10 g and 50 g which enables the use of lightweight bats. The wall of the impact body is of a resiliently compressible material and defines a convexly curved impact zone IB. The ball further includes a flight control assembly (114) including a tail (50) comprising flexible streamers (52), a spacer stem (54) and an anchor fitting (126) for anchoring the spacer stem to the impact body. The configuration of the impact body is such that the impact zone compresses to a minimum compression depth of 12 mm and the impact body bounces to a height of at least 100 cm when the impact body is subjected to a drop test wherein the impact body is dropped onto a test impact surface.

Apparatus (11) for detecting, diagnosing and exercising an individual's functionalities, comprising: a plurality of emitters (15) emitting optical stimuli perceivable by an individual (13); a control unit (19) adapted to control the activation of the emitters (15) and programmed for activating the emitters (15) according to at least one parameter (P) and in accordance with a predetermined sequence (Q); a memory unit (21) in which predetermined sequences (Q) for the activation of the emitters (15) are stored, each sequence (Q) being identified by a univocal sequence reference and comprising the references of a group of emitters (15) belonging to the plurality of emitters and arranged along a path corresponding to the movement to be induced in the eyes of the individual (13); a sensor (31) “Eyetracker” capable of generating an electrical signal indicative of eye movements for detecting eye movements of an individual (13); a processing unit (25) operationally connected to the control unit (19) and programmed for processing the signal, for calculating the time (T.sub.C) elapsed between the activation of an emitter (15) and the moment at which the individual's eyes become fixed on said or another emitter (15) of the sequence, for comparing the time (T.sub.C) with a predetermined threshold (S.sub.1) and for selecting, according to the value resulting from the comparison, the value of the at least one parameter (P) and a predetermined sequence (Q) out of the stored sequences (Q) to be performed in a subsequent working cycle of the apparatus.

A tennis ball including a spherical core. The spherical core including an outer surface and a raised wall integrally molded as part of the outer surface.

A sport carrying bag has a rotatable disc which is configured with a plurality of circumferentially spaced ball-receiving regions including one through-hole region, a mounting plate located below the disc, a chute downwardly extending to a loading section of launching apparatus, a fixed bi-directional ball feeding motor for rotatably driving the disc, and a controller in data communication with the ball feeding motor. Upon rotation of the disc in a first direction, a ball received in the through-hole region ceases to be contacted by the mounting plate and gravitates through the chute to the loading section of the launching apparatus. In response to a detected jammed condition, the controller commands the ball feeding motor to reverse its operating direction such that the disc will rotate in a second direction to cause one or more jammed balls to become dislodged.

Systems, apparatus, and methods for using mobile sporting goods. In one aspect, the system permits a sporting enthusiast to track the location of a mobile sporting good, such as a golf ball, relative to a target, such as a target on a driving range, and correlate that location to a simulated location on a simulated golf hole.

A composite material body (10) includes a first material layer (20) and a second material layer (30) overlapping the first material layer (20). The first material layer (20) and the second material layer (30) are wound to form a flexible and circular rod. Impact absorption is effectively improved and impact resisting strength is enhanced because energy-absorber or damping material or its composition is attached into the composite material body (10). Technical characteristics, effects and objects of this invention are achieved thereby.

A repeatable use valve in a tennis ball that uses a common sports ball inflation needle inserted into and through the valve to increase or decrease the pressure inside the ball. The increase or decrease in pressure will cause the ball to have respectively higher or lower bounce. The valve can be installed in new tennis balls at the time of manufacture. The valve can also be installed in used tennis balls, including used tennis balls that have lost some or all of their original factory pressure.