Hand-portable fire fighting positive pressure water misting and ventilation blower
First Claim
1. A hand-portable fire fighting, positive pressure ventilation and water misting blower for generating and directing a focused water ladened airstream for use in fighting fires and smoke in a structure, using positive pressure ventilation techniques, comprising:
- a portable support frame;
an engine mounted on the frame for rotating a propeller drive shaft on a propeller shaft axis in a prescribed direction of rotation;
a propeller having blades, operatively connected to the propeller drive shaft for directing air in an airstream along the propeller shaft axis in a forward direction in the general form of a helix such that the airstream has a forward directional component and a rotational direction about the propeller axis;
a propeller guard mounted on the frame surrounding the propeller;
at least one misting nozzle operatively stationarily mounted to the frame radially outward of the propeller and directed forward and radially inward toward the propeller axis for directing a misted spray of water angularly forward and radially inward into the airstream to cool the airstream and enable the airstream to carry the water mist into the structure; and
a supply conduit mounted to the misting nozzle and including a water supply fitting for connecting the misting nozzle to a source of water.
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Accused Products
Abstract
The drawings and description describe a hand-portable fire fighting, positive pressure blower with water misting provisions 10 for cooling and producing positive pressure within a smoke filled space and to remove the smoke, heat and carbon dioxide from the area to facilitate extinguishment of the fire and subsequent overhauling. The blower 10 includes a portable support frame 12. An internal combustion engine 13 is mounted thereon with a drive shaft mounted propeller 18 for generating an airstream to be directed into the smoke filled space. Misting nozzles are mountable to the frame and are positioned thereon to direct a spray mist into the airstream from positions radially outward of the airstream. The nozzles are positioned in relation to the direction of propeller rotation so the spray mist will be carried over a maximum distance. The water spray mist substantially cools the airstream which then absorbs much of the heat in the area. The mist also travels with the airstream to help extinguish the fire and to carry products of combustion away. The area is thus left cooler and with greater visibility to enable fire fighters to attack the fire.
38 Citations
25 Claims
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1. A hand-portable fire fighting, positive pressure ventilation and water misting blower for generating and directing a focused water ladened airstream for use in fighting fires and smoke in a structure, using positive pressure ventilation techniques, comprising:
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a portable support frame; an engine mounted on the frame for rotating a propeller drive shaft on a propeller shaft axis in a prescribed direction of rotation; a propeller having blades, operatively connected to the propeller drive shaft for directing air in an airstream along the propeller shaft axis in a forward direction in the general form of a helix such that the airstream has a forward directional component and a rotational direction about the propeller axis; a propeller guard mounted on the frame surrounding the propeller; at least one misting nozzle operatively stationarily mounted to the frame radially outward of the propeller and directed forward and radially inward toward the propeller axis for directing a misted spray of water angularly forward and radially inward into the airstream to cool the airstream and enable the airstream to carry the water mist into the structure; and a supply conduit mounted to the misting nozzle and including a water supply fitting for connecting the misting nozzle to a source of water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A water misting attachment for a hand-portable fire fighting, positive pressure ventilation blower including a portable support frame, an engine mounted on the frame for rotating a propeller drive shaft on a propeller shaft axis in a prescribed direction of rotation, a propeller operatively connected to the propeller drive shaft for directing air in an airstream along the propeller shaft axis in a forward direction in the general form of a helix such that the airstream has a forward directional component and a rotational direction about the propeller axis, and a propeller guard mounted on the frame surrounding the propeller;
- wherein the attachment is comprised of;
at least one misting nozzle; a supply conduit mounted to the misting nozzle and including a water supply fitting for connecting the misting nozzle to a source of water; bracket means for operatively mounting the supply conduit and nozzle to the frame with the nozzle positioned radially outward of the propeller and airstream and oriented in relation to the airstream to direct a misted spray of water angularly forward and radially inward toward the propeller axis and into the airstream. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- wherein the attachment is comprised of;
Specification