Filling valve for a pressurized fluid container

A filling valve for a pressurized fluid container, comprising:

• a tube with a longitudinal bore and a side port formed therein;
• a piston slidingly disposed in said tube, said piston being formed with a bore therethrough;
• a pin fixedly attached to the piston and extending generally parallel to said longitudinal bore downwardly of said piston and extending there below;
• a valve lever pivotally attached to a portion of said tube and defining a cam comprising a jutting portion;
• a float arm attached to said valve lever;
• and
• a float mounted on said float arm, wherein when a liquid in said pressurized fluid container is below a predetermined level within said container and said float is not positioned generally perpendicular to a longitudinal axis of said tube, said pin is engaged, raised and supported by said cam of said valve lever, such that said piston is raised and does not block said side port, thereby permitting fluid flow through said side port, and wherein when said liquid in said pressurized fluid. container is at least at said predetermined level within said. container and said float is sufficiently buoyed by a fluid, said float arm swings upwards to a position generally perpendicular to said longitudinal axis of said tube, said pin is no longer engaged and supported by said jutting portion of said cam of said valve lever and said piston moves downwards and blocks said side port, thereby preventing fluid flow through said side port.