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F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
F16K31/1225—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston with a plurality of pistons
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FR851762A1961-02-061961-02-06Organe d'arrêt ou de fermeture à organe de fermeture actionné par la pression d'un gaz ou d'un liquide
ExpiredFR1279057A
(fr)
Dispositif d'étanchéité pour l'organe de fermeture amovible de réservoirs de pression, canalisations, et notamment pour un couvercle à fermeture rapide pour réservoirs de pression
Appareil permettant d'actionner à un moment déterminé, une commande pouvant arrêter l'alimentation des appareils d'arrosage, ou autres consommant un liquide ou un gaz soumis ou non à une pression