Longitudinal underwater toy and method for loading such a toy

Abstract

An underwater toy includes a longitudinal body with a nose portion, an aft portion and an elastic element. A longitudinal tail with a first end is inserted into a substantially cylindrical portion of the longitudinal body. A second end of the longitudinal tail has an ejection opening for water. The first end includes a portion for sealing between the substantially cylindrical portion of the body and the first end of the longitudinal tail. The tail is thereby provided in the body and is movable in a longitudinal direction inside the body. A cavity is defined by the substantially cylindrical portion of the body and the longitudinal tail. The ejection opening for water is in fluid communication with the cavity. An elastic element is attached in the body and in the tail.

1 . A longitudinal underwater toy with a density close to or somewhat lower than the density of water, wherein the water toy includes a longitudinal body with a nose portion, an aft portion and an elastic element, wherein the water toy furthermore comprises:
 a longitudinal tail with a cylindrical portion with a forward part, a mid section, and an end section forming a first, inner, through duct with a first cross sectional area A, inserted in an inner, substantially cylindrical portion in the longitudinal body, extending from the aft portion of the body, and a tail portion forming a second, inner, through duct with an ejection opening for water with a second cross sectional area B, as wherein the tail portion adjoins the end section and wherein the longitudinal tail is movable in a longitudinal direction in the body; and   a cavity defined by the substantially cylindrical portion of the body and the first, inner, through duct and the second, inner, through duct in the longitudinal tail, such that the ejection opening for water is in fluid communication with the cavity;   wherein the elastic element is attached in a forward portion of the body and in the end section of the cylindrical portion, wherein the underwater toy may adopt a first short configuration where the tail is completely inserted in the body and a second extended configuration where the tail is withdrawn from the body and where the elastic element is tensioned with a force between the body and the longitudinal tail.   
     
     
         2 . The longitudinal underwater toy according to  claim 1 , wherein the elastic element extends along ⅔ of the total length of the longitudinal body when the toy is in the retracted position. 
     
     
         3 . The longitudinal underwater toy according to  claim 1 , where the first cross sectional area A extending through the forward end and the mid portion is larger than the second cross section area B extending through the tail portion. 
     
     
         4 . The longitudinal underwater toy according to  claim 1 , wherein the longitudinal body furthermore includes fins. 
     
     
         5 . The longitudinal underwater body according to  claim 1 , where the longitudinal tail furthermore includes fins. 
     
     
         6 . The longitudinal underwater toy according to  claim 1 , wherein the nose portion furthermore includes a check valve provided to prevent outflow of water from the cavity defined by the substantially cylindrical portion of the body and the longitudinal tail. 
     
     
         7 . The longitudinal underwater toy according to  claim 1 , wherein the tail includes a buoyancy element. 
     
     
         8 . The longitudinal underwater toy according to  claim 1 , wherein the body includes a buoyancy element. 
     
     
         9 . The longitudinal underwater toy according to  claim 1 , wherein the first end includes a portion for sealing between the substantially cylindrical portion of the body and the first end of the longitudinal tail. 
     
     
         10 . The longitudinal underwater toy according to  claim 9 , wherein the portion of the longitudinal tail for sealing between the substantially cylindrical portion of the body and the first end of the longitudinal tail includes a seal. 
     
     
         11 . The longitudinal underwater toy according to  claim 1 , furthermore including a locking mechanism for locking the tail in an extended position of the body where the elastic element is in an extended position. 
     
     
         12 . A method for charging a longitudinal underwater toy as defined in  claim 1  including submerging the toy under water, and pulling the longitudinal tail in a direction away from the body.