Recreational water projectile and uses thereof

Abstract

There is provided a projectile for throwing underwater by hand, the projectile comprising an elongate body having a hemispherical nose and a paraboloid tail portion extending from the hemispherical nose to a flat end, and multiple tail fins extending away from the elongate body and positioned proximate the flat end. There is also provided methods by which the projectile may be filled, emptied, and used for a dodge-the-torpedo game.

What is claimed: 
     
         1 . A projectile for throwing underwater by hand, the projectile comprising:
 an elongate body having a hemispherical nose and a paraboloid tail portion extending from the hemispherical nose to a flat end; and   multiple tail fins extending away from the elongate body and positioned proximate the flat end.   
     
     
         2 . The projectile of  claim 1 , wherein each of the multiple tail fins extend 20 percent or less than a length of the elongate body, and each of the multiple tail fins is positioned at least 0.5 cm from the flat end. 
     
     
         3 . The projectile of  claim 2 , wherein an outer surface of the paraboloid tail portion tapers from the hemispherical nose. 
     
     
         4 . The projectile of  claim 3 , wherein the outer surface of the paraboloid tail portion tapers generally according to the equation: 
       
         
           
             
               Y 
               = 
               
                 
                   5.7 
                   
                     X 
                     2 
                   
                 
                 + 
                 
                   0 
                   ⁢ 
                   X 
                 
                 - 
                 3.2 
               
             
           
         
         wherein Y is a length from a vertex of a parabola defining the paraboloid tail portion, and X is a distance from a midline of the parabola. 
       
     
     
         5 . The projectile of  claim 3 , wherein the elongate body has a hardness of 60 durometer or less. 
     
     
         6 . The projectile of  claim 5 , wherein the hemispherical nose comprises a channel extending therethrough, orientated perpendicular to a longitudinal axis of the elongate body, the channel creating a bumper between a tip of the hemispherical nose and the channel. 
     
     
         7 . The projectile of  claim 6 , wherein, the channel is positioned 4 millimeters behind the tip of the hemispherical nose, and the channel is about 4 millimeters in height and 15 millimeters in length. 
     
     
         8 . The projectile of  claim 3 , wherein the elongate body is hollow and comprises a first section, and a second section releasably securable to the first section, the first section forming at least 15 percent of the elongate body, the first section and the second section collectively forming an interior space within the elongate body when releasably secured together. 
     
     
         9 . The projectile of  claim 8 , wherein the first section comprises a threaded portion and the second section comprises a corresponding threaded portion, wherein when the threaded portions of the first section and the second section are operatively coupled together, the second section is releasably secured to the first section to form the elongate body with the interior space therein. 
     
     
         10 . The projectile of  claim 8 , wherein the first section forms about half of the elongate body and includes the hemispherical nose, and the second section includes the tail fins and the flat end. 
     
     
         11 . The projectile of  claim 8 , wherein the first and second sections are loosely coupled together, such that they break apart upon impact. 
     
     
         12 . The projectile of  claim 3 , wherein the elongate body further comprises:
 an interior space, and   a hole positioned at or proximate the flat end in fluid communication with the interior space.   
     
     
         13 . The projectile of  claim 12 , wherein the hole is positioned in the flat end. 
     
     
         14 . The projectile of  claim 12 , wherein the hole has a diameter from 8 to 16 mm. 
     
     
         15 . The projectile of  claim 12 , wherein the diameter of the hole is about 10 mm. 
     
     
         16 . A method of filling the projectile according to  claim 12  with water, the method comprising:
 holding the projectile under the water with the flat end of the projectile facing a top surface of the water; and 
 shaking the projectile vertically under the water. 
 
     
     
         17 . A method of emptying the projectile according to  claim 12  of water, the method comprising:
 holding the projectile out of water with the flat end of the projectile facing downwards; and 
 shaking the projectile vertically. 
 
     
     
         18 . A method of using the projectile of  claim 1  in a game played in a body of water, the method comprising the steps of:
 positioning a first player a predetermined distance from a second player in the body of water; 
 the first player throwing the projectile underwater at the second player; and 
 the second player dodging or attempting to dodge the thrown projectile from the first player. 
 
     
     
         19 . The method of  claim 18 , wherein the predetermined distance between the first and second players is at least 2 meters. 
     
     
         20 . The method of  claim 18 , further comprising:
 positioning a third player at another predetermined distance from the second player opposite the first player in the body of water,   the third player throwing the projectile of  claim 1  underwater at the second player, and   the second player dodging or attempting to dodge the thrown projectile from the third player.