An object of the present disclosure is to provide a golf ball which has excellent spin performance on approach shots and from which stain such as mud or grass juice can be wiped off when the golf ball has the stain adhered thereto. The present disclosure provides a golf ball comprising a golf ball body and a paint film composed of at least one layer and formed on a surface of the golf ball body, wherein an outermost layer of the paint film includes, as a base resin, a polyurethane obtained by a reaction between a polyisocyanate composition and a polyol composition, the polyol composition contains, as a polyol component, a polyrotaxane having at least two hydroxyl groups and a urethane polyol, and the outermost layer of the paint film has a tackiness of 0.294 N or more measured with a friction tester under specific conditions:

A ball throwing machine system comprising: a housing, the housing comprising a bottom of the housing; an adjustable stand with a base, the base in operational communication with the bottom of the housing via a mechanical joint means, and wherein the housing can lockably move with respect to the base, a first ball inlet located in the housing; a first ball corridor located in the housing and in communication with the first ball inlet; a first ball outlet located in the housing and in communication with the first ball corridor and the first ball inlet; a second ball inlet located in the housing; a second ball corridor located in the housing and in communication with the second ball inlet; a second ball outlet located in the housing and in communication with the second ball corridor and the second ball inlet; a single wheel configured to rotate at user adjustable speeds, and further configured to impart spin and velocity to a ball, wherein the outer surface of the single wheel is located on the floor of the first ball corridor, and wherein the outer surface of the single wheel is located on the ceiling of the second ball corridor. A ball throwing machine comprising: a housing, the housing comprising a bottom of the housing; a first ball inlet located in the housing; a first ball corridor located in the housing and in communication with the first ball inlet; a first ball outlet located in the housing and in communication with the first ball corridor and the first ball inlet; a second ball inlet located in the housing; a second ball corridor located in the housing and in communication with the second ball inlet; a second ball outlet located in the housing and in communication with the second ball corridor and the second ball inlet; a single wheel configured to rotate at user adjustable speeds, and further configured to impart spin and velocity to a ball, wherein the outer surface of the single wheel is located on the floor of the first ball corridor, and wherein the outer surface of the single wheel is located on the ceiling of the second ball corridor and wherein the bottom of the housing is configured to moveably and lockably attach to an adjustable stand, and wherein the housing can lockably move with respect to the adjustable stand.

An apparatus having a control circuit including a computer processor and a computer memory configured with computer software. The control circuit causes a first test assembly to conduct an initial test of the air pressure within an inner chamber of a first tennis ball; and if the control circuit determines that the air pressure is below a threshold, a pressurization process increases the air pressure inside the inner chamber of the first tennis ball by piercing the outer skin of the first tennis ball with a needle, until a tip of the needle is in the inner chamber, and a first opening, plugged by the needle, is formed in the outer skin of the first tennis ball. The needle tip is thereafter withdrawn from the inner chamber of the first tennis ball, leaving the first opening unplugged and sealant is applied to the first opening to close the first opening.

A golf putting stroke practicing device includes a box-like housing designed to lie on any appropriate surface such as a carpeted floor wherein the front and bottom panels of the housing are provided with semi-circular/half-round cutouts that together create the realistic illusion of a regulation golf hole. The front of the housing is configured to deflect errant shots away from the hole opening. The device is easily carried and stored and can hold a number of regulation balls when not in use.

A golf putting stroke practicing device includes a box-like housing designed to lie on any appropriate surface such as a carpeted floor wherein the front and bottom panels of the housing are provided with semi-circular/half-round cutouts that together create the realistic illusion of a regulation golf hole. The front of the housing is configured to deflect errant shots away from the hole opening. The device is easily carried and stored and can hold a number of regulation balls when not in use.

A method and system for determining concentricity of a multiple layer golf ball are disclosed herein. One or more images of a golf ball are generated using an X-ray source, a camera or a digital detector, and an image intensifier. An edge detection algorithm is preferably utilized. The method also includes calculating Y,Z center coordinates of the a best fit diameter or ellipse of the inner edge layer and outer edge layer of the multiple layer golf ball.

A golf ball sorting system has a ball feeder, a ball mover, a detector, and a sorting system. The ball feeder may be configured to receive a plurality of golf balls. The ball mover may be configured to move each of the plurality of golf balls one at a time at a predetermined minimum speed. The detector may be configured to inspect each of the plurality of golf balls moved by the movement mechanism and output a detection result based on the inspection. The sorting system may be configured to receive the detection result and sort the plurality of golf balls based on the detection result to separate golf balls that include a mark that is not visible to an observer from golf balls that do not include a mark.

A main body of a ball collecting and discharging machine includes a traveling portion and a ball collecting and discharging portion to collect and discharge balls. A controller causes the ball collecting and discharging portion to collect the balls scattered in a ball scattered area while causing the traveling portion to cause the main body to travel along a ball collecting route in the ball scattered area. When the ball collecting and discharging portion reaches a state of being ready to discharge balls during or after ball collecting work, the controller causes the traveling portion to cause the main body to travel along the ball discharging route and causes the ball collecting and discharging portion to discharge balls at the ball discharging site.

A portable throwing game assembly for use in ball throwing games includes an upper game body having a substantially flat top surface with a central aperture formed therethrough. A lower game body is attached to a bottom side of the upper game body, the lower game body having two pairs of retractable legs configured to fold into one another for storage and transporting the game assembly. Handle slots are formed on the lateral sides of the lower game body to facilitate moving of the game assembly. Channels are formed on the respective bottoms of the feet of one of the pairs of retractable legs. Protrusions are formed on the respective bottoms of the feet of the other pair of retractable legs, the protrusions being configured to mate with the channels when both pairs of legs are retracted for storage and transportation.

The disclosed system can comprise a device that can be used to provide induction heating to one or more golf balls. The disclosed device comprises at least one induction coil and a housing that holds one or more golf balls. In some embodiments, the induction coil can take one or more turns around the housing. The induction coil generates a magnetic field surrounding the golf ball, inducing eddy currents in the central magnetic reactor within the golf ball interior. As a result, the golf ball is quickly, cleanly, and consistently heated without physical contact between the coil and the golf ball.