Foam generating fire fighting device

Claim 1

An apparatus for generating and discharging foam comprising: a container for storing a liquid foam generating solution and for receiving a gaseous propellant; a propellant supply chamber connected to and communicating with the interior of said container at a location exterior of the container and above the surface of said liquid foam generating solution; propellant supply means for storing said gaseous propellant attached to and communicating with said propellant supply chamber for pressurizing said propellant supply chamber and said container; an aeration chamber having a plurality of apertures therein and attached to said propellant supply chamber, such that said aeration chamber communicates with said propellant supply chamber through said plurality of apertures to receive said gaseous propellant; ejector means having a receiving end and a discharging end, said ejector means being disposed such that said receiving end of said ejector means contacts said liquid foam generating solution within said container, said discharging end of said ejector means being attached to said aeration chamber, such that said ejector means forms a fluid tight passageway for transporting said liquid foam generating solution to said aeration chamber, wherein said gaseous propellant entering said aeration chamber through said plurality of apertures aerates and agitates said liquid foam generating solution to produce an aerated liquid foam generating solution; and a discharge tube having a receiving end and a discharging end, said receiving end of said discharge tube connected to said aeration chamber to receive said aerated liquid foam generating solution, wherein said discharge tube transports and further agitates said aerated liquid foam generating solution to thereby produce foam at said discharging end of said discharge tube.

Claim 2

An apparatus for generating and discharging foam comprising: a container for storing a liquid foam generating solution and for receiving a gaseous propellant; a propellant supply chamber connected to and communicating with the interior of said container at a location exterior of the container and above the surface of said liquid foam generating solution; propellant supply means for storing said gaseous propellant attached to and communicating with said propellant supply chamber for pressurizing said propellant supply chamber and said container; an aeration chamber having a plurality of apertures therein and attached to said propellant supply chamber, such that said aeration chamber communicates with said propellant supply chamber through said plurality of apertures to receive said gaseous propellant; ejector means having a receiving end and a discharging end, said ejector means being disposed such that said receiving end of said ejector means contacts said liquid foam generating solution within said container, said discharging end of said ejector means being attached to said aeration chamber, such that said ejector means forms a fluid tight passageway for transporting said liquid foam generating solution to said aeration chamber, wherein said gaseous propellant entering said aeration chamber through said plurality of apertures aerates and agitates said liquid foam generating solution to produce an aerated liquid foam generating solution; and a discharge tube having a receiving end and a discharging end, said receiving end of said discharge tube connected to said aeration chamber to receive said aerated liquid foam generating solution, wherein said discharge tube transports and further agitates said aerated liquid foam generating solution to thereby produce foam at said discharging end of said discharge tube.

Claim 7

An apparatus for generating and discharging foam comprising: a container for storing a liquid foam generating solution; ejector means having a receive end and a discharge end, said ejector means being disposed such that said receive end receives said liquid foam generating solution and such that said discharge end of said ejector means is disposed exterior of said container; aeration means attached to said discharge end of said ejector means for introducing a gaseous aeration agent into said liquid foam generating solution thereby producing an aerated liquid foam generating solution; said aeration means comprises a tubular walled body having a plurality of apertures therein disposed within the flow path of said liquid foam generating solution at said discharge end of said ejector means, said plurality of apertures being disposed circumferentially and centrally around the walls of said tubular body; and foam generating hose means for producing foam from said aerated liquid foam generating solution having a discharge end and a receiving end, said receiving end being attached to said aeration means to receive said aerated liquid foam generating solution such that foam production occurs between said receive end and said discharge end of said foam generating hose means through back pressure and frictional turbulence within said foam generating hose means, said foam generating hose means being of sufficient length and cross-section to produce foam of a desired volume and fluidity.

Claim 8

An apparatus for generating and discharging foam comprising: a container for storing a liquid foam generating solution; ejector means having a receive end and a discharge end, said ejector means being disposed such that said receive end receives said liquid foam generating solution and such that said discharge end of said ejector means is disposed exterior of said container; aeration means attached to said discharge end of said ejector means for introducing a gaseous aeration agent into said liquid foam generating solution thereby producing an aerated liquid foam generating solution; said aeration means comprises a tubular walled body having a plurality of apertures therein disposed within the flow path of said liquid foam generating solution at said discharge end of said ejector means, said plurality of apertures being disposed circumferentially and centrally around the walls of said tubular body; and foam generating hose means for producing foam from said aerated liquid foam generating solution having a discharge end and a receiving end, said receiving end being attached to said aeration means to receive said aerated liquid foam generating solution such that foam production occurs between said receive end and said discharge end of said foam generating hose means through back pressure and frictional turbulence within said foam generating hose means, said foam generating hose means being of sufficient length and cross-section to produce foam of a desired volume and fluidity.

Claim 11

An apparatus for generating and discharging foam comprising: a container for storing a liquid foam generating solution; ejector means having a receive end and a discharge end, said ejector means being disposed such that said receive end receives said liquid foam generating solution and such that said discharge end of said ejector means is disposed exterior of said container; aeration means attached to said discharge end of said ejector means for introducing a gaseous aeration agent into said liquid foam generating solution thereby producing an aerated liquid foam generating solution; said aeration means comprises means having at least one aperture therein disposed within the flow path of said liquid foam generating solution at said discharge end of said ejector means; and foam generating hose means for producing foam from said aerated liquid foam generating solution having a discharge end and a receiving end, said receiving end being attached to said aeration means to receive said aerated liquid foam generating solution such that foam production occurs between said receive end and said discharge end of said foam generating hose means through back pressure and frictional turbulence within said foam generating hose means, said foam generating hose means being of sufficient length and cross-section to produce foam of a desired volume and fluidity.

Claim 12

An apparatus for generating and discharging foam comprising: a container for storing a liquid foam generating solution; ejector means having a receive end and a discharge end, said ejector means being disposed such that said receive end receives said liquid foam generating solution and such that said discharge end of said ejector means is disposed exterior of said container; aeration means attached to said discharge end of said ejector means for introducing a gaseous aeration agent into said liquid foam generating solution thereby producing an aerated liquid foam generating solution; said aeration means comprises means having at least one aperture therein disposed within the flow path of said liquid foam generating solution at said discharge end of said ejector means; and foam generating hose means for producing foam from said aerated liquid foam generating solution having a discharge end and a receiving end, said receiving end being attached to said aeration means to receive said aerated liquid foam generating solution such that foam production occurs between said receive end and said discharge end of said foam generating hose means through back pressure and frictional turbulence within said foam generating hose means, said foam generating hose means being of sufficient length and cross-section to produce foam of a desired volume and fluidity.