초록 ▼

Apparatus for generating foam for use in fire fighting having two plates housed in a chamber which respectively introduce pressurized air and a water/surfactant solution between the two plates where foam is generated and emitted from an aperture on the side of the chamber. The pressurized water/soap

Apparatus for generating foam for use in fire fighting having two plates housed in a chamber which respectively introduce pressurized air and a water/surfactant solution between the two plates where foam is generated and emitted from an aperture on the side of the chamber. The pressurized water/soap solution enters the chamber through an orifice in one plate. Pressurized air enters the chamber through a number of channels bored through the other plate, such channels appearing in an annular grove which circumscribes the water inlet. The plates are provided with surfaces which are brought together to form a restricted area therebetween. The restricted area balances the pressure between the incoming water and the incoming air by achieving an equilibrium at some particular radius out from the center of the two plates. This equilibrium radius moves in and out from the center as necessary to keep the two pressures balanced. The apparatus also includes a pressure regulating system that automatically cuts off the flow of pressurized water and air when the foam dispensing nozzle is turned off.

대표청구항 ▼

[ What is claimed is:] [13.] An apparatus for generating foam, comprising:(a) a dosed chamber;(b) a first plate mounted within said chamber;(c) a second plate mounted within said chamber proximate to said first plate wherein a restricted area is formed between said first plate and said second plate;

[ What is claimed is:] [13.] An apparatus for generating foam, comprising:(a) a dosed chamber;(b) a first plate mounted within said chamber;(c) a second plate mounted within said chamber proximate to said first plate wherein a restricted area is formed between said first plate and said second plate;(d) a pressurized water and surfactant inlet connected to said chamber and passing through the center of one of said plates; and(e) a pressurized air inlet connected to said chamber and passing through one of said plates at a position that is radially outward from the center of said one of said plates, thereby forming a lower pressure area between said pressurized water and surfactant inlet and said pressurized air inlet for receiving and mixing water and surfactant and air.