Abstract: A foam generating device for a fire hose, comprising a socket designed to be attached to a water supply hose, a hose nozzle consisting of a first end wherein air inlets are made and of a second end for spraying the foam, an intermediate body attached between the socket and the first end of the hose nozzle and allowing the creation of several separate water jets passing through. The intermediate body is so arranged as to receive an emulsifying fluid and to pre-mix it with the water jets by aspiration and by contact of the emulsifying fluid with the water jets, then to spray the jets of water-emulsifier premix and to stir them with the air streams in the hose nozzle.

Abstract: A fire nozzle foam-generator homogeneously expands a water/foam-forming agent and air premix. A nozzle spout is coaxial with a divergent cone having splines that generate divergent, strong, and separate jets of the premix that are incident on an internal surface of the nozzle spout where the jets merge to cause sucking of air towards the inside of the nozzle spout. As a result, the contact surface area between the air and premix increases, there is powerful mixing between the air and the premix, and an increase in to the range of the foam jet by progressive acceleration of the premix.

Abstract: The present invention relates to a fire hose lance comprising a body (1) including a pressure control device comprising a valve (44) partly closing up an axial drill hole (320) of a piston (32) mounted in the body (1) of the lance, characterized in that valve (44) is fixedly mounted on the body (1), piston (32) is slidably mounted in the body (1), wherein movement of the piston (32) is caused, on the one hand, by the force resulting from the fluid's total pressure exerted on the surface (D1) of the piston located opposite valve (44) and on the other hand, by the force exerted by restoring means (31) tending to neutralize the resulting force from the fluid pressure.