Water shooting toy with high capacity

Abstract

The water shooting toy is composed of an outer sleeve, an inner sleeve and a pushing rod. The outer sleeve is a hollow cylinder with an open end and a closed end with an aperture. The inner sleeve is a hollow cylinder with an open end and is slidably accommodated within the outer cylinder. The open end of the inner sleeve is in the outer sleeve. The pushing rod includes a rod penetrating a closed end of the inner sleeve, a piston at inner end of the rod and a grip at an outer end of the rod. When the grip is pushed or pulled, the piston axially slides in the inner sleeve and the inner sleeve also slides in the outer sleeve to generate a change of water capacity formed by the two sleeves

1 . A water shooting toy comprising:
 an outer sleeve, being a substantial cylinder having an open end and a closed end, wherein the closed end is provided with an aperture, the open end is inwards disposed with a flange, and a hole is formed within the flange;   an inner sleeve, being a substantial cylinder having an open end and a closed end, slidably accommodated in the outer sleeve through the open end of the outer sleeve, wherein the open end of the inner sleeve is within the outer sleeve, the inner sleeve and the outer sleeve are in airtight contact with each other, and an end side of the closed end of the inner sleeve is provided with a through hole; and   a pushing rod comprising:
 a rod; 
 a piston at one end of the rod; and 
 a grip at the other end of the rod; 
   wherein the rod passes through the through hole, the piston is within the inner sleeve, the grip is out of the inner sleeve, the piston and the inner sleeve are in airtight contact with each other;   thereby when the grip is pushed or pulled, the piston is slid in the inner sleeve and the inner sleeve is slid in the outer sleeve for changing an accommodating space, and the piston is blocked by the end side of the inner sleeve when the piston is moved outwards.   
     
     
         2 . The water shooting toy of  claim 1 , further comprising a first O-ring put around the open end of the inner sleeve and sandwiched between the inner sleeve and the outer sleeve to make airtight. 
     
     
         3 . The water shooting toy of  claim 1 , further comprising a second O-ring put around the piston and sandwiched between the piston and the inner sleeve to make airtight. 
     
     
         4 . The water shooting toy of  claim 1 , wherein the aperture is formed by a tube extending inwards and outwards, at least one passing hole is disposed around the tube, an inner end of the tube is covered by a cap having a passage communicating with the tube, a flexible valve is disposed around the cap, the flexible valve normally abuts against the end side of the outer sleeve for preventing the at least one passing hole from communicating with the outer sleeve, a projectile is put around the tube, the projectile seals up the tube;
 thereby when the pushing rod is pulled outwards, outside air enters the at least one passing hole to force the flexible valve to leave the end side of the outer sleeve, thus the inner sleeve and outer sleeve are filled with air; and when the pushing rod is pushed, the flexible valve is forced to seal up the at least one passing hole and inside air must pass through the passage and the tube to shoot the projectile off.   
     
     
         5 . The water shooting toy of  claim 1 , wherein the outer sleeve or the grip is covered by a layer of sponge.