Focused stream, aerated foam projecting nozzle including fixed wand system and method as well as possibly portable center pointing nozzle
AssigneeTyco Fire Products LP
InventorsDwight P. Williams, Casey R. Spears
Life of this patent
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Abstract
The invention includes components and methodology for fixed and semi-fixed systems for extinguishing fire in large industrial flammable liquid storage tanks, including aerated foam projecting nozzles discharging substantially focused streams together with aeration chambers and risers and the formation of wand heads and wands. Specifically, the invention includes a nozzle having a tip portion, the tip portion having a stream shaper, and the stream shaper having at least four fins with a longitudinal dimension in the tip portion greater than a radial dimension in the tip portion.
Claims11
A nozzle for projecting aerated fire fighting foam in a substantially focused stream, the nozzle comprising:
- a cylindrical tip portion defining a longitudinal axis and terminating the nozzle at an outermost end, the cylindrical tip portion including an inner wall, the cylindrical tip portion having a stream shaper,
- wherein the stream shaper has a plurality of fins with a longitudinal dimension in the cylindrical tip portion greater than a radial dimension in the cylindrical tip portion,
- wherein an end of each of the plurality of fins is positioned substantially flush with the outermost end of the nozzle,
- wherein each of the plurality of fins is positioned in the cylindrical tip portion to span from the longitudinal axis to the inner wall of the cylindrical tip portion;
- and
- a tapered swedge down portion comprising a first end and a second end, the second end being connected to the cylindrical tip portion, an opening at the first end being larger than an opening at the second end,
- wherein the tapered swedge down portion is attached by a conduit to, and proximally downstream of, an ambient air aeration chamber, the conduit structured to provide substantially open, unobstructed flow upstream of the plurality of fins for at least a distance of a diameter of the outermost end, and
- wherein the tapered swedge down portion does not include the stream shaper.
Dependencies are inferred from the claim text.