Valve assembly for packing fluid under pressure and packing provided with such assembly
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsJean-Marie Politi, Lennart Franz
Life of this patent
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Abstract
The valve assembly for non-returnable packing comprises a valve housing including a main valve and an auxiliary valve the latter being initially kept in opened position through a resilient locking device which is unlocked, at the end of a first filling through a displacement of the main valve beyond its position of normal opening under the action of a long travel filling tap. The auxiliary valve is then forced to rest on its seat by means of a spring with low calibration. Any depression caused by tapping would provoke the opening of the auxiliary valve, while any overpressure resulting from filling would hit the auxiliary valve in a closed position.
Claims10
Valve assembly for fluid container (1) under pressure of the type comprising a valve housing (7) including a main valve (26) urged into closing position by means of a first return spring (33;87) and capable of cooperating with means (690;600) for operating the main valve against the action of the first spring, which comprises an auxiliary valve (45) disposed in said housing (7), in series with the main valve (26), said auxiliary valve being drawn into closing position by means of a second low calibration spring (50;50') and initially maintained in opening position by a locking means (44;99) initially loaded in locked position and displaceable towards a final unlocked position by the main valve (26), during a pronounced opening action exerted by the activating means (690;600) on the main valve beyond its normal opening travel.
Dependencies are inferred from the claim text.