LOCKING-TRIGGER DEVICE Russian patent published in 2003 - IPC

FIELD: fire engineering equipment, particularly outlet devices for fire-fighting systems carrying out independent spraying of fire-extinguishing substance, which is stored under pressure into vessel. SUBSTANCE: device comprises body communicating with vessel for pressurized fire- extinguishing substance by outlet channel. Spraying apparatus outlet orifice is formed on device body side wall. Outlet orifice is sealed by piston loaded by working fluid of shutoff chamber which communicates through drainage channel with trigger mechanism frangible membrane. Piston is collapsible. Piston outer bushing is loosely installed on body cylindrical chamber step. Outer bushing end has undercut and longitudinal blind groove in which locking finger is arranged. Locking finger is fixed to central stepped plunger having axial through channel with throttle formed into support, which is arranged axially to contact sealant mounted into locking chamber closure. EFFECT: increased functional reliability of independent locking-trigger device, possibility of rapid response automatic spraying of fire-extinguishing fluid from high- pressure vessel to fire seat after fire initiation.