Heating – Heating or heat retaining work chamber structure – Door – cover or port
Patent
1998-11-13
1999-12-07
Paschall, Mark
Heating
Heating or heat retaining work chamber structure
Door, cover or port
126 85B, 126307R, F23J 1102
Patent
active
059972955
ABSTRACT:
An all weather inlet/exhaust structure (32) for an outdoor furnace (10,12,14) includes a generally rectangular upper compartment (40) having an imperforate upper wall (42) and horizontally louvered, vertical side walls (44) along with an imperforate bottom wall (46) with a generally central opening (48) therein. A lower compartment (56) in the form of an inverted truncated pyramid with its upper wall being defined by the lower wall (46) of the upper compartment is provided. The lower compartment has horizontally louvered, sloped, inwardly directed side walls (58) terminating in an open bottom (60) of smaller size than the first compartment lower wall (46). A generally rectangular inlet air duct (66) depends from the lower edges of the lower compartment side walls (58) and an exhaust duct (26) is disposed within the inlet air duct (66) and extends upwardly through the lower compartment (56) to the generally central opening (48) and the bottom wall (46) of the upper compartment (40).
REFERENCES:
patent: 3636853 (1972-01-01), Sable
patent: 4089640 (1978-05-01), Overmyer et al.
patent: 4286569 (1981-09-01), Bergman et al.
patent: 5680856 (1997-10-01), Van Dijk
Knowles Colette L.
Mattson Norman E.
Modine Manufacturing Company
Paschall Mark
Wilson Gregory A.
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