Systems, apparatus, and methods related to recreational balls with illuminated surfaces are described herein. In some embodiments, an apparatus includes an air-tight object having an outer layer and an inner layer. The opacity of the outer layer is greater than the opacity of the inner layer. The outer layer defines an aperture. Additionally, a light module is configured to send light from an interior of the air-tight object through the aperture of the outer layer.

An object of the present invention is to provide a golf ball traveling a great flight distance. The present invention provides a golf ball comprising a spherical core and a cover covering the spherical core, wherein the golf ball has a ratio (t2/t1) of a time (t2) to a time (t1) of 1.05 or more in a hitting test using a driver (at a head speed of 40 m/sec), wherein the time (t1) is a time taken from a moment that the driver begins to contact with the golf ball to a moment that the golf ball reaches a maximum deformation amount, and the time (t2) is a time taken from the moment that the golf ball reaches the maximum deformation amount to a moment that the golf ball leaves the driver.

A smart ball (100) comprising: an inner sphere portion (12) consisting of a cork like material and an outer sphere (19) that ensconces said inner sphere, said inner sphere further comprising: a cylindrical cavity (14), located substantially at the core of said ball, said cavity formed by drilling into said cork from an operative top side; a sensor assembly (16) placed in the centre of said cylindrical cavity along a reference plane defined by a locus of points wherein said points being collinear points running from a first end of said seam (18) to a second end of said seam, thereby ensuring that orthogonal measurements of said sensor assembly being aligned with orthogonal axes of said ball; and a charging port on said seam, said charging port connected to a battery placed in said cylindrical cavity and said battery connected to said sensor assembly.

A smart ball (100) comprising: an inner sphere portion (12) consisting of a cork like material and an outer sphere (19) that ensconces said inner sphere, said inner sphere further comprising: a cylindrical cavity (14), located substantially at the core of said ball, said cavity formed by drilling into said cork from an operative top side; a sensor assembly (16) placed in the centre of said cylindrical cavity along a reference plane defined by a locus of points wherein said points being collinear points running from a first end of said seam (18) to a second end of said seam, thereby ensuring that orthogonal measurements of said sensor assembly being aligned with orthogonal axes of said ball; and a charging port on said seam, said charging port connected to a battery placed in said cylindrical cavity and said battery connected to said sensor assembly.

A golf ball 2 includes a main body 4 and a paint layer 6 positioned outside the main body 4. The main body 4 includes a spherical core 8, a mid layer 10 positioned outside the core 8, and a cover 12 positioned outside the mid layer 10. An outer surface of the paint layer 6 forms a surface of the golf ball 2. A contact angle CAw with respect to water measured on the surface of the golf ball 2 is not less than 70 degrees. The paint layer 6 is preferably formed from a resin composition. A preferable resin composition includes a polyurethane as a base resin and includes a silicone compound and/or a fluorine compound. Another preferable resin composition includes a silicone compound and/or a fluorine compound as a base resin and includes no polyurethane.

A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. An average depth Fav of the dimples 12 and an average height Hav of the minute projections satisfy the following mathematical formula (1).
Hav/Fav0.050(1)
A ratio M (%) of a sum of areas of all the dimples 12 relative to a surface area of a phantom sphere of the golf ball and an average value Pav (m) of pitches P each between a minute projection 18 and another minute projection 18 adjacent to this minute projection 18 satisfy the following mathematical formula (2).
M/Pav>0.3(2)

An object of the present invention is to provide a golf ball having excellent shot feeling and resilience as well as improved durability and abrasion resistance. The present invention provides a golf ball comprising a spherical core and one or more cover layers disposed outside the spherical core, wherein at least one layer of the cover layers contains: (A) a base resin containing (a-1) an ionomer resin and having a material hardness of 58 or less in Shore D hardness; and (B) a polyrotaxane having a cyclodextrin with at least a part of hydroxyl groups thereof being modified with a caprolactone chain having a carboxyl group at a terminal of the caprolactone chain, a linear molecule piercing through a cyclic structure of the cyclodextrin, and blocking groups located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin.

A luminous ball with remote activation capability includes a sphere, a cover and a light-emitting device. The cover wraps an external circumferential surface of the sphere and is made of a light-transmissive material. At least one seam is formed on the cover, and a plurality of seam apertures are disposed in pairs along two sides of the at least one seam. The light-emitting device is disposed in the sphere and includes a light-emitting unit, a power unit, a wireless transmitter-receiver unit and a main control unit. The main control unit is operably configured to provide an electrical connection between the light-emitting unit and the power unit after obtaining an activation signal received by the wireless transmitter-receiver unit such that light emitted by the light-emitting unit penetrates the sphere and the cover and is visible through the at least one seam and the plurality of seam apertures.

A flight-enhanced ball has an exterior liner, a series of texturizing recesses, and a ball body. The exterior liner is superimposed onto the ball body and used to provide a textured or friction-reducing surface. Additionally, the texturizing recesses traverse into the exterior liner to provide a textured surface that facilitate throwing the ball in a straight line at high velocities. The ball body is designed to be semi-deformable to act as a shock absorber. Thus, the ball body enables the ball to absorb the impact forces generated by a collision with an athletes' body.

A flight-enhanced ball has an exterior liner, a series of texturizing recesses, and a ball body. The exterior liner is superimposed onto the ball body and used to provide a textured or friction-reducing surface. Additionally, the texturizing recesses traverse into the exterior liner to provide a textured surface that facilitate throwing the ball in a straight line at high velocities. The ball body is designed to be semi-deformable to act as a shock absorber. Thus, the ball body enables the ball to absorb the impact forces generated by a collision with an athletes' body.