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US 5,857,627 AGranted
Foam-forming nozzle
OwnerSimon Howard Horwell, Philip H. Briceinventors
Life of this patent
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Abstract
A nozzle arrangement for a medium expansion foam fire extinguisher. The nozzle arrangement comprises a discharge tube with a discharge port for the foam at one end. At the other end there is a full cone supply nozzle for the foam concentrate solution. The tube has air inlets in line with the outlet from the spray nozzle. A mesh screen is located between the supply nozzle and the discharge outlet.
Claims5
A hand held portable medium expansion foam fire extinguisher having a reservoir for a supply of foam concentrate solution, means for discharging said foam concentrate solution from said reservoir, comprising:
- a nozzle arrangement having;
- a casing, said casing having a proximal end and a distal end, said casing having a foam discharge port at said distal end;
- a foam concentrate solution supply nozzle within said casing, having an outlet for discharging a cone of foam concentrate spray into said casing;
- at least one air inlet to said casing;
- and a mesh screen, said mesh screen being located within said casing at a position intermediate said supply nozzle and said discharge port;
- said at least one air inlet being located along said casing at a position in line with said outlet from said supply nozzle;
- wherein said foam concentrate solution is at a pressure in the range of from about 3 to about 15 bar and the foam expansion ratio of said foam in use is in the range of from about 1:20 to about 1:150.
4 more elements
Dependencies are inferred from the claim text.