Abstract: A fire extinguisher includes a pressure vessel containing an extinguishing agent and pressurized gas and a valve remotely operated by a manual control at the outlet end of the delivery hose for controlling the discharge of the extinguishing agent from the pressure vessel to the delivery hose. This discharge control valve is opened and closed by a pneumatic cylinder operated by pressurized gas from a valve pneumatically operated by a manually actuated valve mounted near the outlet end of the delivery hose.

Abstract: A fire extinguishing system includes a container of extinguishing agent and a valve for controlling the discharge of the extinguishing agent. The discharge control valve is opened and closed by a pneumatic cylinder operated by pressurized gas through a solenoid-actuated directional control valve. The solenoid of the directional control valve is coupled with a pneumatic timing relay actuated by a temperature sensor. With this arrangement, a pre-determined amount of extinghishing agent is discharged from the container and delivered to the hazard area and then the discharge shut-off. The discharge cycle is repeated, if necessary, until the fire is extinguished. The system is then automatically reset and ready to deliver further extinguishing agent on demand. The system also includes manual or automatic means for purging the delivery line downstream of the discharge control valve.