Dual fluid method and apparatus for extinguishing fires

A dual fluid nozzle and apparatus for the extinction of fires comprising

• a first conduit for receiving a first fluid and for discharging the fluid form a first conduit orifice;
• a second conduit coupled to the first conduit for receiving a second fluid and for discharging the second fluid in liquid form from a second conduit orifice;
• the first and second orifices being relatively sized and relatively positioned such that the first discharged fluid assumes a flow path distinct from and surrounded by the second discharged fluid;
• means for supplying the first fluid to the first conduit;
• and
• means for supplying the second fluid to the second conduit.

A dual fluid nozzle for the extinction of fires comprising

• a first conduit for receiving a first fluid and for discharging the first fluid from a first conduit orifice;
• a second conduit coupled to the first conduit for receiving a second fluid and for discharging the second fluid in liquid form from a second conduit orifice;
• the first and second orifices being relatively sized and relatively positioned such that the first discharged fluid assumes a flow path surrounded by the second discharged fluid;
• eductor means attached within the second conduit for educting a foam concentrate into the nozzle, the eductor means having a first inlet to receive a portion of the second fluid to create reduced pressure in the eductor and a second inlet to receive the foam forming concentrate;
• and
• a mixing chamber communicating with the eductor means, located in and discharging into the second conduit.