Underwater play ball

Abstract

The underwater play ball is comprised of a hollow cavity with a spherical shape which is made of a strong flexible lightweight low density PVC material for holding both water and air pressure without rupturing. The cavity size and dry weight can vary, but the preferred cavity size equals the size of a average soccer ball where the dry weight is easily handled by children. The cavity is inflated with a safe rubber nozzle attachable to any size hose. The cavity includes a predetermined transparent level mark arranged around two valves at one end of the cavity. The water volume and air pressure inside the cavity is adjusted by filling water through a valve while releasing ambient air simultaneously through a second valve until the water volume and air pressure reaches a predetermined transparent fill level mark. The arrangement of a strong flexible lightweight low density PVC cavity combined with a predetermined amount of water and air pressure provides a underwater play ball with both weightless and pneumatic characteristics under water. Such an arrangement, provides a underwater play ball that can naturally glide under the waters surface in a straight line when passed by a swimmer by its self and repeatedly rebound on impact to its original position by itself when passed or bounced for amusement and exercise.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]I claim the priority of provisional patent application 61 / 209,572 filed on Mar. 9, 2009. This application is related to my co-pending applications Ser. No. 9 / 902,386 Jul. 10, 2001 now, U.S. Pat. No. 6,443,799 and Ser. No. 11 / 007,966 Dec. 9, 2004 now U.S. Pat. No. 7,448,340.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention generally relates to underwater game balls.[0004]2. Prior Art[0005]Underwater game balls such as underwater rugby, underwater soccer are limited to negative buoyancy arrangements. Although some underwater soccer balls use only slightly negative buoyancy, their movement under water is limited to rolling on the pool bottom. There are neutral buoyant underwater foot balls that can be passed under water, but they require electrical power. Further, such underwater game balls can not rebound on impact to their original position naturally by their self when passed kicked or bounced.OBJECTIVES OF THE I...

AI Technical Summary

Benefits of technology

[0009]The underwater play ball is comprised of a hollow cavity with a spherical shape, comprised of a strong flexible lightweight low density PVC material for holding both water and air pressure without rupturing. The cavity size is small enough to have a dry weight easily handled by children such as a soccer ball size. The cavity is inflated with a typical garden hose with an attached universal rubber nozzle used to fit standard and foreign hose sizes. The cavity includes a predetermined transparent fill level mark arranged around two valves at one end of the cavity. The water volume and air pressure inside

Problems solved by technology

Underwater game balls such as underwater rugby, underwater soccer are limited to negative buoyancy arrangements.

Although some underwater soccer balls use only slightly negative buoyancy, their movement under water is limited to rolling on the pool bottom.

Further, such underwater game balls can not rebound on impact to their original position naturally by their self when passed kicked or bounced.

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