Method and apparatus for generating fire-fighting foam

Claim 3

Apparatus for producing fire-fighting foam comprising a housing having a hydraulically powered fan means for propelling air through a perforated member, foam solution spray nozzles positioned within said housing with a connection to a source of foam solution under pressure, said foam solution nozzles being directed generally toward said perforated member whereby the air flowing through said member is entrained with the foam solution to produce foam, the improvements comprising: a plurality of water jet nozzles with a connection to a source of water under pressure and rotatably mounted and attached to said fan means, the said water nozzles pointed at an angle relative to their axis of rotation so as to produce a reaction force for rotating said fan means and laid out in an arrangement for wetting said foam.

Claim 4

Apparatus for producing fire-fighting foam comprising a housing having a hydraulically powered fan means for propelling air through a perforated member, foam solution spray nozzles positioned within said housing with a connection to a source of foam solution under pressure, said foam solution nozzles being directed generally toward said perforated member whereby the air flowing through said member is entrained with the foam solution to produce foam, the improvements comprising: a plurality of water jet nozzles with a connection to a source of water under pressure and rotatably mounted and attached to said fan means, the said water nozzles pointed at an angle relative to their axis of rotation so as to produce a reaction force for rotating said fan means and laid out in an arrangement for wetting said foam.

Claim 5

Apparatus according to claim 2 wherein said rotatably mounted water jet nozzles are carried on elongated arms.

Claim 6

Apparatus for producing fire-fighting foam comprising a housing having a hydraulically powered fan means for propelling air through a perforated member, foam solution spray nozzles positioned within said housing and having a connection with a source of foam solution under pressure, said foam solution nozzles being directed generally toward said perforated member whereby the air flowing through said perforated member is entrained with the foam solution to produce foam; an impeller wheel rotatably mounted and attached to the fan means, the improvements comprising: a plurality of fixed nozzles connected with a source of water under pressure, said water nozzles being directed toward the blades of said impeller wheel, said blades being positionally related so that said water is directed onto said foam after it impinges on said blades.

Claim 7

Apparatus for producing fire-fighting foam comprising a housing having a hydraulically powered fan means for propelling air through a perforated member, foam solution spray nozzles positioned within said housing and having a connection with a source of foam solution under pressure, said foam solution nozzles being directed generally toward said perforated member whereby the air flowing through said perforated member is entrained with the foam solution to produce foam; an impeller wheel rotatably mounted and attached to the fan means, the improvements comprising: a plurality of fixed nozzles connected with a source of water under pressure, said water nozzles being directed toward the blades of said impeller wheel, said blades being positionally related so that said water is directed onto said foam after it impinges on said blades.

Claim 8

Apparatus for producing fire-fighting foam, comprising a hydraulically powered fan means for propelling air through a perforated member, said fan powered in tandem by introducing separately, foam solution under pressure and water under pressure; the said foam solution discharging from the said tandem arrangement to wet the said perforated member and entraining with the air flow to form foam; the said water discharging from the said tandem arrangement being directed to spray onto the said foam.

Claim 9

Apparatus for producing fire-fighting foam, comprising a hydraulically powered fan means for propelling air through a perforated member, said fan powered in tandem by introducing separately, foam solution under pressure and water under pressure; the said foam solution discharging from the said tandem arrangement to wet the said perforated member and entraining with the air flow to form foam; the said water discharging from the said tandem arrangement being directed to spray onto the said foam.

Claim 10

Apparatus for producing fire-fighting foam comprising a housing having a hydraulically powered fan means for propelling air through a perforated member; a plurality of nozzles for discharging foam solution rotatably mounted and attached to said fan means, the said foam solution discharging nozzles pointing at an angle relative to their axes of rotation so as to produce a reaction force for rotating said fan means and laid in an arrangement for wetting said perforated member whereby the air flowing through said member is entrained with the solution to produce foam, the improvements comprising: a plurality of nozzles for discharging water and attached to said fan means, the said water discharging nozzles pointing at an angle relative to their axis of rotation so as to produce a reaction force for rotating said fan means in tandem with the rotating foam solution discharging nozzles, the said water discharging nozzles being laid out in an arrangement for wetting said foam that has been discharged from the said perforated member.

Claim 11

Apparatus for producing fire-fighting foam comprising a housing having a hydraulically powered fan means for propelling air through a perforated member; a plurality of nozzles for discharging foam solution rotatably mounted and attached to said fan means, the said foam solution discharging nozzles pointing at an angle relative to their axes of rotation so as to produce a reaction force for rotating said fan means and laid in an arrangement for wetting said perforated member whereby the air flowing through said member is entrained with the solution to produce foam, the improvements comprising: a plurality of nozzles for discharging water and attached to said fan means, the said water discharging nozzles pointing at an angle relative to their axis of rotation so as to produce a reaction force for rotating said fan means in tandem with the rotating foam solution discharging nozzles, the said water discharging nozzles being laid out in an arrangement for wetting said foam that has been discharged from the said perforated member.

Claim 12

Apparatus for producing fire-fighting foam comprising fan means for propelling air through a perforated member, a plurality of impeller wheels rotatably mounted and attached to the fan means for driving in tandem the fan means; a plurality of foam solution discharging nozzles directed toward the blades on one of the impeller wheels, said blades being positionally related so that said foam solution is directed onto said perforated member after it impinges on said blades, air flowing through said perforated member is entrained with the foam solution to produce foam; a plurality of water discharging nozzles directed toward the blades of the second impeller wheel being positionally related so that said water is directed onto said foam after it impinges onto said blades of the second impeller wheel.

Claim 13

Apparatus for producing fire-fighting foam comprising fan means for propelling air through a perforated member, a plurality of impeller wheels rotatably mounted and attached to the fan means for driving in tandem the fan means; a plurality of foam solution discharging nozzles directed toward the blades on one of the impeller wheels, said blades being positionally related so that said foam solution is directed onto said perforated member after it impinges on said blades, air flowing through said perforated member is entrained with the foam solution to produce foam; a plurality of water discharging nozzles directed toward the blades of the second impeller wheel being positionally related so that said water is directed onto said foam after it impinges onto said blades of the second impeller wheel.