Patent ID: 8225816

Claim:
A tank for pressurized fluid, comprising: (i) a casing delimiting a storage volume and provided with an orifice for communicating with the inside of the tank, and (ii) the tank comprising a filling and distribution head positioned at the orifice, the filling and distribution head comprising: (a) a mounting portion intended to be housed in the orifice of the tank, (b) an isolating member, (c) a pressure-regulating portion housing a pre-regulating device, the pre-regulating device being positioned relative to the mounting portion such that it is housed at least partially inside the tank when the head is in the mounted position, wherein the pre-regulating device comprises a pre-regulating valve urged toward a seat and subjected to the opposing force of a pre-regulating piston, and wherein the pre-regulating piston comprises an internal duct connected, on the one hand, to the isolating member and, on the other hand, to a low-pressure chamber situated at the junction between the seat and the pre-regulating piston, (d) a filling circuit extending between a first end provided with a filling orifice and a second end intended to communicate with the inside of the tank, (e) a tapping-off circuit extending between a first end communicating with the inside of the tank and a second end provided with a tapping-off orifice wherein the filling orifice coincides with the tapping-off orifice.