Patent ID: 7954678

Claim:
A Pressure control device provided for a fluid dispensing container comprising a first cylinder having an open end and a closed end, provided for being pressurized with a gas at a predetermined excess pressure, a piston with a sealing ring being movable within said first cylinder, a second cylinder with a closed end and an open end, provided for being filled with a gas at a pressure higher than the excess pressure, the first cylinder being encompassed by the second cylinder as to form a ring-shaped passage between the first and second cylinder, whereby the open end of the second cylinder arranged adjacent to the open end of the first cylinder, a passageway leading from the inside of the second cylinder past the outer wall of the first cylinder to the outside; a valve for releasing and closing said passageway, wherein said piston comprises a stem for opening and closing the valve, characterized in that the open end of the first cylinder is provided with at least one axially directed incision, such that the piston with the sealing ring introduced in the first cylinder and covering the end of the incision is in a non-pressurized position, and the stem having a stop element which closes the valve in the upper position of the piston, wherein the length of the stem is defined to determine the stroke of the piston between the non-pressurized position and the valve closing position, which piston stroke in conjunction with the inner volume of the piston space at the valve closing position defines the predetermined excess pressure.