Foam aspiration nozzle
OwnerJ.R. Nerat, Seth Rooneyinventors
Life of this patent
Estimating the term…
Abstract
A foam aspiration nozzle for use with fire extinguishers. The foam aspiration nozzle includes a discharge tube having air inlets that are partially protected by a shield to prevent blockage, the shield having an open end to allow the entry of air. The foam aspiration nozzle also includes a spray flange which is configured with spray orifices that direct a water and foaming agent into the discharge tube where the water and foaming agent is mixed with air from the air inlets. The result of spraying the water and foaming agent such that air is introduced to the mixture is the production of foam which is expelled from the discharge tube for application to a burning substance to extinguish flames emanating from the substance.
Claims20
A device for the production of firefighting foam, the device comprising:
- an attachment portion in fluid communication with an inlet tube;
- a plurality of outlet orifices located in a spray flange and in fluid communication with the inlet tube;
- the plurality of outlet orifices being located adjacent to an outlet recess;
- a wand portion having a first end and a second end, the wand portion comprising air inlets adjacent to the first end and a foam outlet at the second end, when the wand portion is affixed to the spray flange, the plurality of outlet orifices are located adjacent to the air inlets;
- and
- the plurality of outlet orifices aligned such that their alignments converge at a point located outside of a spatial area formed by the outlet recess.
A fire extinguisher foam generating device, the device comprising:
- a spray flange comprising an input, a plurality of outlet orifices in fluid communication with the input, the plurality of outlet orifices arranged about a central axis, each orifice arranged such that a stream passing through the orifice converges at a point on a line extending along the central axis of the spray flange;
- a tubular wand comprising a flange mating surface at a first end of the wand, the mating surface adapted to receive the spray flange, the wand comprising a plurality of air inputs located adjacent to the receiver, and an outlet at a second end of the wand;
- a shield portion having an open first end and an opening formed in a second end, the spray flange passing through the opening formed in the second end and affixed to the first end of the wand using the receiver, the shield portion captured between the spray flange and the receiver portion of the wand.
A method of producing firefight foam comprising the steps of:
- providing a water and foaming agent mixture;
- pressurizing the water and foaming agent mixture such that it passes through a spray flange comprising a plurality of orifices, the water and foaming agent mixture directed through the orifices to form a plurality of streams;
- aligning the plurality of orifices such that the streams of water and foaming agent converge at a point above the spray flange inside a wand portion, the point along an axial centerline of the spray flange, the wand portion having a tubular structure with the spray flange positioned at a first end and having an exit port at a second end;
- introducing air to the converging streams of water and foaming agent from air inlets formed in sidewalls of the wand portion such that the water and foaming agent is converted to foam inside the wand portion;
- and
- expelling the foam from the exit port of the wand portion.
A device for the production of firefighting foam, the device comprising:
- an attachment portion in fluid communication with an inlet tube;
- at least 2 outlet orifices each having a diameter ranging from 0.085 to 0.1 inches and located in a spray flange, the spray flange in fluid communication with the inlet tube;
- the at least 2 outlet orifices being located adjacent to a concave outlet recess;
- a tubular wand portion having a first end and a second end, the wand portion comprising air inlets adjacent to the first end and a foam outlet at the second end, a shield portion surrounding the air inlets;
- when the wand portion is affixed to the spray flange, the plurality of outlet orifices being located adjacent to the air inlets with the air inlets located closer to the first end of the tubular wand portion than the outlet orifices;
- and
- the plurality of outlet orifices aligned such that their alignments converge at a point located outside of a spatial area formed by the outlet recess.
Dependencies are inferred from the claim text.