Fire damper

Details Fire damper Fire damper

1986-06-04

1988-08-16

Joyce, Harold

Flexible or portable closure, partition, or panel

Automatic control

16 485, 98 1, 160 6, E05F 1520

Patent

active

047637110

ABSTRACT:
A fire damper having a temperature-sensitive link assembly designed to permit ease of maintenance of the damper. In one embodiment, the link assembly includes a fusible link that extends across and holds the blades folded. At each end, the link is coupled to a bracket embracing the blades by a pivot pin and an associated latch that is manually releaseable. During maintenance of the damper, either latch can be released and the link will then swing down about the pivot pin at the opposite end of the link, permitting the damper blades to close. In normal use, the blades will also close in response to an over-temperature condition causing the fusible link to break. In an alternative embodiment, a plain non-fusible link is used and one of the latches is released by a temperature-sensitive actuator made of memory metal.

REFERENCES:
patent: 3467163 (1969-09-01), Vassaux
patent: 3687185 (1972-08-01), Singer
patent: 3734114 (1973-05-01), Phillips
patent: 3796248 (1974-03-01), McCabe
patent: 4292707 (1981-10-01), Williams
patent: 4333392 (1982-06-01), Nailor et al.

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