Tank-mounted filling device

Claim 1

A tank, particularly for liquefied gas, which comprises a wall defining an inner volume, a floating mechaninsm having a float arranged in said inner volume and a filling device mounted on the wall, which filling device comprises: a. a housing mounted in the tank wall, which housing has a chamber and a supply duct opening with one end therein, b. a valve seat on the end of the duct, c. a cut-off valve which is arranged inside said chamber, which valve has: a head cooperating with said valve seat and closing off said duct in the closing position, but still leaving free in said position a space about itself, said space extending to the closed duct, and a piston forming body which separates said space about the head from a backmost volume lying on that valve side removed from the duct, which valve is provided with a duct free from any valve, extending length-wise through the body and the head thereof, between the backmost chamber volume and an outlet in the head facing the supply duct, the housing being provided with at least one opening which brings the tank inner volume into communication with said space about the head and, in the valve open position, also with the supply duct, the housing being also provided with a duct between the backmost chamber volume and the tank inner volume, d. a spring which pushes the cut-off valve to the closing position, e. a valve which is controlled by the float mechanism and is mounted inside the duct between the backmost chamber volume and the tank inner volume and cuts off said duct when the liquid inside the tank has reached a determined level, and, f. a one-way valve which is mounted between said float mechanism-controlled valve and said chamber inside the housing, inside said duct between the backmost chamber volume and the tank inner volume, which one-way valve only lets fluid flow to the tank inner volume.