Smoke and heat vent

Details Smoke and heat vent Smoke and heat vent

1977-03-10

1978-09-12

Kannan, Philip C.

Movable or removable closures

Thermal releaser or actuator

Fusible closure latch or retainer

49 31, 52 1, E05F 1520

Patent

active

041126203

ABSTRACT:
A new and improved smoke and heat vent including a frame assembly pivotally attached to a curb member adapted for placement on the roof of a building or the like. The frame assembly supports a dome-shaped cover and is movable between a closed, dome supporting position and an open, released position in which the dome-shaped cover is allowed to fall or slide downwardly by itself to clear an opening for the escape of heat and smoke under emergency conditions. The initial fall of the dome-shaped cover is retarded to remove any extra load such as snow on the cover and the cover is caught by several bands attached to the curb member so that it will not fall to a floor below.

REFERENCES:
patent: 3399500 (1968-09-01), Shapiro
patent: 3589065 (1971-06-01), Watson
patent: 3788013 (1974-01-01), Veen, Jr.
patent: 3908309 (1975-09-01), Coulter et al.

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