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Priority to NL6504096ApriorityCriticalpatent/NL6504096A/xx
Publication of NL6504096ApublicationCriticalpatent/NL6504096A/xx
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
F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded