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US 2010/0163256 A1Published application
Range enhanced fire fighting nozzle and method (centershot ii)
AssigneeTyco Fire & Security GmbH
InventorDwight P. Williams
Life of this patent
Estimating the term…
Abstract
An enhanced range and landing pattern, straight stream and fog, fire fighting nozzle including solid bore and annular discharge ports wherein the nozzle discharges an inner stream surrounded by an outer stream.
Claims22
An at least 95 gpm, at 100 psi, range and landing pattern optimized, fog nozzle for fire fighting, comprising:
- nozzle elements defining
- a nozzle inlet in fluid communication with a source of fire fighting liquid;
- an annular conduit in fluid communication with the inlet, having an annular discharge port;
- a sleeve surrounding the annular discharge port, adjustable to extend downstream from the annular discharge port, the annular port and sleeve structured and adjustable in combination to discharge a straight stream or a fog pattern;
- a solid bore conduit in fluid communication with the nozzle inlet, having a solid bore discharge port located radially inward of the annular conduit and discharge port, the solid bore conduit and port sized and structured to discharge at least 50% of the nozzle discharge;
- a stream straightener in the annular conduit, located approximately mid-nozzle;
- a stream straightener for the bore conduit located proximate to or upstream of an inlet of the bore conduit;
- and
- wherein the annular discharge port has an outward swedge angle of between 30 degrees to 50 degrees.
6 more elements
A method for fighting fires, comprising:
- discharging at least 50% of a nozzle inlet fire fighting liquid through a solid bore conduit and discharge port;
- discharging at least 10% of the inlet fire fighting liquid through an annular discharge port located radially outward of the solid discharge port, the port having an outward swedge angle of between 30 degrees and 50 degrees;
- adjusting a sliding sleeve to a straight stream pattern for the annular discharge;
- and
- structuring the nozzle to provide generally laminar flow for both the annularly discharged liquid and the solid bore discharged liquid, including an annular conduit stream straightener and a solid bore conduit stream straightener.
2 more elements
Dependencies are inferred from the claim text.