Steady stream water gun

Abstract

A toy water gun is provided which includes a main housing having a handle as well as a water ejection nozzle located thereon. A water supply tank is connected to the main housing which can be filled with water. A pump is located on the housing for pumping water from the supply tank to a pressure chamber located on the main housing. The pressure chamber includes a piston which defines one wall of a water containment space and can be displaced from its neutral position in the pressure chamber housing against a biasing force so that a steady stream of water is discharged from water gun through a nozzle connected to the pressure chamber.

1 . A water gun, comprising:
 a main housing;   a supply tank connected to the main housing;   a pressure chamber connected to the main housing, including a pressure chamber housing with a spring loaded piston located therein;   a pump for drawing water from the supply tank and forcing the water into a water containment space in the pressure chamber housing to displace the piston against a biasing force of the spring; and   a nozzle in direct, uninterruptible communication with the pressure chamber to discharge water from the water gun.   
     
     
         2 . The water gun of  claim 1 , wherein the pressure chamber comprises a cylindrical tube with a first closed end cap and a second end cap that includes the nozzle, and one end of the spring rests against the first end cap. 
     
     
         3 . The water gun of  claim 2 , wherein the second end cap and the nozzle are integrally molded in one piece. 
     
     
         4 . The water gun of  claim 2 , wherein the cylindrical tube is made of a clear polymeric material, and a window is provided in the main housing so that a position of the piston in the pressure chamber is externally observable by a user. 
     
     
         5 . The water gun of  claim 2 , wherein the cylindrical tube has a diameter from about 1.5 inches to 2 inches, and the nozzle has an opening with a diameter of about 0.062 to about 0.125 inches. 
     
     
         6 . The water gun of  claim 1 , wherein a first check valve is located between the water supply tank and the pump, and a second check valve is located between the pump and the pressure chamber. 
     
     
         7 . The water gun of  claim 1 , wherein an interior of the pressure chamber with the pressurized water is in direct uninterruptible communication with the nozzle for ejecting water. 
     
     
         8 . The water gun of  claim 1 , wherein the pump is battery powered. 
     
     
         9 . The water gun of  claim 1 , wherein the pump is manually actuateable. 
     
     
         10 . A method of operating a water gun, comprising:
 providing a water gun, a main housing, a supply tank connected to the main housing, a pressure chamber connected to the main housing, including a pressure chamber housing with a spring loaded piston located therein, a pump for drawing water from the supply tank and forcing the water into the pressure chamber housing to displace the piston against a biasing force of the spring, and a nozzle in direct, uninterrupted communication with a containment space of the pressure chamber, to discharge water from the water gun;   a user holding the housing with a first hand and actuating the pump with a second hand   simultaneously ejecting water from the nozzle and displacing the spring loaded piston in the pressure chamber with pressurized water from the pump to create a pressurized water reservoir; and   continuing to eject water from the nozzle of the water gun after ceasing to actuate the pump.