Water balloon filling valve

A valve for selectively dispensing an essentially noncompressible fluid from a pressurized source into a receptacle, said valve comprising:

• a body portion having a first end and a second end, the ends communicated by an internal channel, the first end adapted to engage the source and the second end adapted to engage the receptacle;
• the internal channel having an intermediate portion comprising a hollow cylinder with a valve spool slidingly engaged therein, the valve spool having first and second enlarged portions effectively dividing the hollow cylinder into a first and a second chamber, the chambers not communicated to each other, the internal channel further having a first and a second passage communicating the hollow cylinder with the first end and a third passage communicating the hollow cylinder with the second end, the valve spool being held in the cylinder by a pin seated in an aperture in the first end such that an end of the pin extends into the cylinder sufficiently to block movement of the first enlarged portion therepast;
• wherein the first and second passages communicate with the first chamber and the third passage communicates with the second chamber when the valve spool is in a first closed position, the pressure of the essentially noncompressible fluid in the first chamber providing an outward biasing force on the valve spool into the closed position;
• and
• wherein the first passage communicates with the first chamber and the second and third passages communicate with the second chamber when the valve spool is moved to a second open position by application of an external force on the valve spool overcoming the outward biasing force, the communication of the second and third passages to the second chamber forming the internal channel and allowing fluid flow through the valve;
• and
• wherein release of the external applied force allows the pressure of the fluid in the first chamber to restore the valve spool to the first closed position.