Fire flap arrangement

Details Fire flap arrangement Fire flap arrangement

1982-10-20

1985-07-30

Scott, Samuel

Fluid handling

Systems

Flow path with serial valves and/or closures

137340, 137869, 251 65, 98 1, F16K 118

Patent

active

045315442

ABSTRACT:
A fire flap arrangement for installation in a flow channel comprises a housing with opposite front walls and openings in the front walls. A pair of fire flaps are pivoted in said housing and held by means of permanent magnets in rest positions outside of the flow area. A locking bar within the housing can be displaced radially inwards pivoting the fire flaps into their locking positions in which they close the front wall openings. The locking bar in its locking position bridges the pair of fire flaps and presses them outwards against the front walls. The arrangement is actuated by a liquid pressure driven piston, the liquid also serving as a cooling medium for the housing.

REFERENCES:
patent: 606787 (1898-07-01), Kersteter
patent: 1314609 (1919-09-01), Sault
patent: 1921280 (1933-08-01), Blake
patent: 2446196 (1948-08-01), Sitney
patent: 2739606 (1956-03-01), Madaras
patent: 2755633 (1956-07-01), McClain
patent: 3541945 (1970-11-01), Wexler
patent: 3720153 (1973-03-01), Jardinier et al.
patent: 3783887 (1974-01-01), Shoji
patent: 4183397 (1980-01-01), d'Orsay et al.
patent: 4347865 (1982-09-01), Worley

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