Das Nachfüllen verhinderndes Ventil für nicht nachfüllbare Behälter

摘要

A non-refill valve (1) for a non-refillable container, comprising a valve body (7) having an inlet (9) and an outlet (11) and a passage through the valve body (7) interconnecting the inlet (9) and the outlet (11). A valve stem (13) slides in the passage (15) and has an axial passageway (15) that extends partway therethrough and that terminates laterally in a passageway (17) that extends through a side wall of the stem (13) intermediate the ends of the stem. A ball (21) in the stem (13) rests on a seat (23) on the stem (13) and closes the valve stem passageway (15) against the flow of gas from the outlet (11) towards the inlet (9). A first spring (25) urges the ball (21) against the seat (23) to permit flow of gas only in a direction from the inlet (9) to the outlet (11) by displacing the ball (21) from the seat (23) against the action of the first spring (25) in an open position of the valve (1). A second spring (45) urges the stem (13) in the direction of the flow of gas from the inlet (9) to the outlet (11), and a seal (49) acts between the stem (13) and the valve body (7). The second spring (45) urges the seal (49) into sealing relation with the valve body (7) in a closed position of the valve (1), whereby when a coupling (5) is attached to the valve body (7), the coupling (5) urges the stem (13) in a direction opposite the first-mentioned direction and against the action of the second spring (45) to move the seal (49) out of sealing relation with the valve body (7), thereby to establish communication between the inlet (9) and the outlet (11) when the pressure of a gas in the inlet (9) is sufficient to move the ball (21) off the seat (23) against the action of the first spring (25).