Stoves and furnaces – Stove hoods
Patent
1993-06-28
1995-07-04
Dority, Carroll B.
Stoves and furnaces
Stove hoods
126301, 126314, 285205, 285424, 55DIG36, F24C 1520
Patent
active
054291160
ABSTRACT:
Removable filters tailored to pollution by different cookers under a hood, have locating punched out notches on locator pins located on a removable drain trough according to a pattern whereby, after the filters are removed for cleaning, they must be re-installed in their original locations. A field-installed outlet collar assembly includes a flanged one-piece inner collar received up through a field-cut opening in the hood top. Two tapered half frames are hammered in laterally, wedging between the top of the hood and the top flange of the collar, sealing the bottom flange of the collar to a gasket sealed to the underside of the hood top. An access door assembly is similarly field-installed. Exhaust duct sections have joint features snapped together and interlocking.
Fire damper assemblies inside the exhaust and make-up air plenums include horizontally slidable panels positionable in a maximized standardized hood to reduce its flow rates to match specific cooking fume ventilating requirements. The panels are spring biased against position locating pins which are fusible to permit closure of the panels in case of fire. Adjustable fire dampers at intake slots of make-up air diffuser assemblies are closable to selectable stop pin locations to match makeup air to the cooking units. The stop pins are fusible to permit the panels to close in case of fire.
REFERENCES:
patent: 2987330 (1961-06-01), Curran
patent: 3323439 (1967-06-01), Weaver et al.
patent: 3566585 (1971-03-01), Voloshen et al.
patent: 3870494 (1975-03-01), Doane
patent: 4281635 (1981-08-01), Gaylord
patent: 4346692 (1982-08-01), McCauley
patent: 4373509 (1983-02-01), Neitzel et al.
patent: 4887587 (1989-12-01), Deutsch
patent: 5320088 (1994-06-01), Nester
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