Pressurised toy water gun

Abstract

A toy water gun includes a reservoir for storing liquid, a firing chamber, a nozzle extending from the firing chamber, a valve for closing off the nozzle, a firing piston in communication with the firing chamber and biased by a spring to diminish the volume of the firing chamber, a pump receiving liquid from the reservoir and delivering same under pressure to the firing chamber whereupon the firing piston moves against the firing spring, and a trigger connected with the valve so as to open the valve to eject liquid contents of the firing chamber under pressure through the nozzle.

1 . A toy gun comprising:
 a reservoir for storing liquid;   a firing chamber;   a nozzle extending from the firing chamber;   a valve for closing off the nozzle;   a firing piston in communication with the firing chamber;   a firing spring biasing the firing piston in a direction to diminish the volume of the firing chamber;   a pump receiving liquid from the reservoir and delivering same under pressure to the firing chamber whereupon the firing piston moves against the firing spring;   a trigger connected with the valve so as to open the valve to eject liquid contents of the firing chamber through the nozzle under pressure.   
     
     
         2 . The toy gun of  claim 1 , wherein the pump comprises a reciprocating priming piston and an inlet connected via a conduit to the reservoir and an outlet connected via a conduit to the firing chamber. 
     
     
         3 . The toy gun of  claim 1 , wherein the valve includes a valve stem extending along an axis of the nozzle. 
     
     
         4 . The toy gun of  claim 3 , wherein the firing spring is a coil spring having a longitudinal axis that is common with that of the nozzle. 
     
     
         5 . The toy gun of  claim 4 , wherein the valve stem passes through the firing piston. 
     
     
         6 . The toy gun of  claim 3 , further comprising a valve closing spring surrounding the valve stem and biasing the valve into a closed position. 
     
     
         7 . The toy gun of  claim 5 , further comprising a valve opening spring surrounding the valve stem behind the firing piston.