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US 4,300,496 AGranted
Atmosphere exclusion hood means for internal combustion motors of portable rescue tools and related equipment and the like
OwnerRobert A. Priceinventor
Life of this patent
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OwnerRobert A. Priceinventor
Estimating the term…
Firemen and other rescue workers customarily use various portable rescue equipment, such as, saws, or prying tools, and air evacuation or exhaust fans powered by internal combustion motors. As a lack of atmospheric air or a reduction to levels not supporting internal combustion affects the proper functioning of such motors, atmospheric air is excluded from the carburetors thereof by an air exclusion hood means attached thereto or associated therewith, and air from an air pack worn by the worker or other suitable remotely located source of compressed air is introduced thereinto through a line from such source to a demand type regulator valve as such fresh air is demanded or required by the motor. Thus, a supply of uncontaminated air from the air pack or remote source may be fed into the demand regulator valve and, thence, into the carburetor to fulfill the requirements of the motor and to insure the proper functioning thereof.
The combination with a portable rescue device useable by a rescue worker in fire and other rescue work and powered by an internal combustion motor including a carburetor, and a source of compressed air associated with said device, demand regulator valve means associated with said device and having a high pressure inlet side and a suction outlet side, said high pressure side being connected by conduit means to said compressed air source, atmosphere exclusion hood means mounted adjacent to said carburetor, openable and closeable apertures in said hood means for introducing atmospheric air thereinto and to said carburetor, said hood means being interconnected by conduit means to the suction outlet side of said demand regulator valve means whereby when smoke, toxic fumes or a deficiency of oxygen is encountered said apertures are closable to seal said hood means against the entry of atmospheric air, and said demand regulator valve means controls the release of unadulterated air through said suction outlet side and said conduit means to said hood means and thence into said carburetor as the demand therefor is required by said carburetor and motor for insuring continued efficient operation thereof.
Dependencies are inferred from the claim text.