F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
F16L55/10—Means for stopping flow from or in pipes or hoses
F16L55/1007—Couplings closed automatically when broken
Safety break coupling for e.g. gas hoses comprises halves which seal automatically when they separate, one half carrying curved levers on mounting ring which fit into recesses on other half and are held in place by release ring