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US 7,458,427 B2Granted
Mixing chamber for producing compressed air foam for fire extinguishing devices
OwnerUlrich Braun, Helmut Andrisinventors
Life of this patent
Estimating the term…
Abstract
The invention relates to a mixing chamber for producing compressed air foam in fire extinguishing devices. The mixing chamber has a compressed air inlet, an extinguishing agent inlet and a compressed air foam outlet. The contour of the mixing chamber tapers towards the compressed air foam outlet. The invention also includes a fire extinguishing device. The fire extinguishing device includes an extinguishing agent container, a connecting device for connecting a source of compressed air to a mixing chamber of the kind described above.
Claims13
A mixing chamber for producing compressed foam for an extinguishing device for fire fighting, the mixing chamber defining a contour, the mixing chamber comprising:
- a compressed air inlet communicating with a compressed air duct connected to a compressed air source;
- an extinguishing agent inlet connected to an extinguishing agent container;
- a compressed air foam outlet, the contour of said mixing chamber tapering towards said compressed air foam outlet;
- and
- a foam controller behind said compressed air foam outlet, said foam controller selectively providing a disturbance element in a passageway defined by said compressed air foam outlet, said foam controller comprises a switch element which can be shifted between first and second positions transverse to a flow direction of the compressed air foam, and said switch element selectively keeps said passageway defined by a duct connected to said compressed air foam outlet free when in the first position, and provides said disturbance element in said duct when in the second position.
2 more elements
A mixing chamber for producing compressed foam for an extinguishing device for fire fighting, the mixing chamber defining a contour, the mixing chamber comprising:
- a compressed air inlet communicating with a compressed air duct connected to a compressed air source;
- an extinguishing agent inlet connected to an extinguishing agent container;
- and
- a compressed air foam outlet, the contour of said mixing chamber tapering towards said compressed air foam outlet;
- and
- a foam controller behind said compressed air foam outlet, said foam controller selectively providing a disturbance element in a passageway defined by said compressed air foam outlet, said disturbance element defining a plurality of passageways.
3 more elements
A fire extinguishing device comprising:
- an extinguishing agent container;
- a compressed air source;
- a connecting duct connected with said compressed air source;
- a mixing chamber defining a contour, the mixing chamber comprising:
- a compressed air inlet connected with said compressed air source;
- an extinguishing agent inlet connected with said extinguishing agent container;
- and
- a compressed air foam outlet, and the contour of said mixing chamber tapering towards said compressed air foam outlet;
- said connecting duct comprising a first compressed air duct connected to said mixing chamber and a second compressed air duct connected to said extinguishing agent container;
- and
- a component comprising said mixing chamber is directly mounted to said extinguishing agent container, said component is connectable to said compressed air source via a single pressure pipe, and a compressed air flow in said first compressed air duct and said second compressed air duct is divided by bores in said component.
8 more elements
A fire extinguishing device comprising:
- an extinguishing agent container;
- a compressed air source;
- a mixing chamber defining a substantially conical contour to create turbulence, said contour defining a bottom portion, said contour tapering toward a tip portion opposite said bottom portion, the mixing chamber comprising:
- a compressed air inlet connected with said compressed air source to introduce compressed air into the bottom portion of said contour;
- an extinguishing agent inlet connected with said extinguishing agent container to introduce extinguishing agent into the bottom portion of said contour;
- the compressed air and the extinguishing agent undergoing turbulent mixing to form a compressed air foam when the compressed air and extinguishing agent are introduced into the mixing chamber;
- and
- a compressed air foam outlet adjacent the tip portion to exhaust said compressed air foam from said mixing chamber;
- and
- a connecting duct connected with said compressed air source, said connecting duct comprising a first compressed air duct connected to said mixing chamber and a second compressed air duct connected to said extinguishing agent container;
- wherein a component comprising said mixing chamber is directly mounted to said extinguishing agent container and wherein said mixing chamber is connected to said compressed air source via a single pressure pipe, and a compressed air flow in said first compressed air duct and said second compressed air duct is divided by bores in the component comprising said mixing chamber.
8 more elements
A fire extinguishing device comprising:
- an extinguishing agent container;
- a compressed air source;
- a mixing chamber defining a substantially conical contour to create turbulence, said contour defining a bottom portion, said contour tapering toward a tip portion opposite said bottom portion, the mixing chamber comprising:
- a compressed air inlet connected with said compressed air source to introduce compressed air into the bottom portion of said contour;
- an extinguishing agent inlet connected with said extinguishing agent container to introduce extinguishing agent into the bottom portion of said contour;
- the compressed air and the extinguishing agent undergoing turbulent mixing to form a compressed air foam when the compressed air and extinguishing agent are introduced into the mixing chamber;
- a compressed air foam outlet adjacent the tip portion to exhaust said compressed air foam from said mixing chamber;
- and
- a foam controller behind said compressed air foam outlet, said foam controller selectively providing a disturbance element in a passageway defined by said compressed air foam outlet, wherein said foam controller comprises a switch element which can be shifted between first and second positions transverse to a flow direction of the compressed air foam, and said switch element selectively keeps said passageway defined by a duct connected to said compressed air foam outlet free when in the first position, and provides said disturbance element in said duct when in the second position.
6 more elements
A fire extinguishing device comprising:
- an extinguishing agent container;
- a compressed air source;
- a mixing chamber defining a substantially conical contour to create turbulence, said contour defining a bottom portion, said contour tapering toward a tip portion opposite said bottom portion, the mixing chamber comprising:
- a compressed air inlet connected with said compressed air source to introduce compressed air into the bottom portion of said contour;
- an extinguishing agent inlet connected with said extinguishing agent container to introduce extinguishing agent into the bottom portion of said contour;
- the compressed air and the extinguishing agent undergoing turbulent mixing to form a compressed air foam when the compressed air and extinguishing agent are introduced into the mixing chamber;
- a compressed air foam outlet adjacent the tip portion to exhaust said compressed air foam from said mixing chamber;
- and
- a foam controller behind said compressed air foam outlet, such foam controller selectively providing a disturbance element in a passageway defined by said compressed air foam outlet, wherein said disturbance element defines a plurality of passageways.
6 more elements
Dependencies are inferred from the claim text.