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Title: Mobile home fireplace with external air supply
Claims: I claim: 1. An improved fireplace comprising: a combustion chamber; a chimney connected to the chamber; a solid door for substantially sealing the chamber off from the air supply within the interior of a dwelling containing the fireplace; a combustion chamber air supply duct having an upper end and a lower end, the upper end defining an air inlet hole and terminating within the combustion chamber by protrusion through the chamber floor to a point above said floor but below and behind the door so that burning materials and hot ashes on the floor are substantially prevented from entering the duct, the lower end of the duct having an elongate section protruding through the floor of the dwelling to a position below the floor outside the dwelling; the duct defining a substantially unobstructed air path from a source of exterior air to the interior of the chamber behind the door and above the chamber floor when the chamber is sealed. 2. The combination of a mobile home having a floor and at least one interior room, a fireplace having a combustion chamber having with a lower floor for burning material thereon and a chimney connected to the chamber a solid door operatively connected to the fireplace to substantially seal off the combustion chamber from air from within the interior of the mobile home during burning of materials in the chamber, and an external air supply source, wherein the improvement comprises: an L-shaped external air supply duct defining a direct and substantially unobstructed air path from a source of air outside the mobile home to the combustion chamber floor, one end of the duct terminating in a plate defining a plurality of air holes and protruding through the chamber floor below and behind the sealing door to a point substantially above the floor of the combustion chamber so that burning materials and hot ash are substantially prevented from entering the duct, the duct having a downwardly depending section protruding through the chamber floor and the floor of the mobile home to a point below both floors and outside the mobile home, the downwardly depending section connected to a hollow horizontal section lying below the mobile home. 3. In combination with a mobile home having a floor and at least one room, a fireplace having a chimney, the fireplace including a combustion chamber having a floor for burning material thereon, a solid door on the chamber for sealing the chamber off from air within the room during burning of materials within the chamber, wherein the improvement comprises: a combustion chamber air supply duct operatively connected to the interior of the combination chamber, the duct further comprises: a perpendicular L-shaped duct one end of which defines a hollow elongate flared duct section and the other end of which defines a horizontal hollow pipe section, the flared duct section having an elongate box section thereon which defines at least one combustion chamber air supply hole, the box section protruding through the combustion chamber floor from below to a position behind the door and above the chamber floor and below the bottom of door so that entry of burning materials and hot ash from said materials into the duct is substantially prevented; the pipe section lying in a horizontal plane outside the mobile home below the mobile home floor and capped at its terminal end by a porous member. Other info: Inventors: Fisher, Eugene W. (Dallas, OR, US) Application Number: 573540 Filing Date: 1975-05-01 Publication_date: 1977-12-06 Assignee: Primary Class(es): 126/515 126/276, 126/547, 296/156, 296/168 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Capossela, Ronald C. Assistant Examiner: Attorney: Swanson; Francis |
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