Fire rated wall damper assembly

Details Fire rated wall damper assembly Fire rated wall damper assembly

1998-04-20

1999-09-28

Joyce, Harold

Ventilation

Having inlet airway

Including automatic control means

454369, A62C 206

Patent

active

059577720

ABSTRACT:
A fire damper having a surrounding frame positioned rearwardly of a register or grill diffuser within a construction wall installation is fixedly secured to a sleeve assembly having a rear surface aligned substantially co-linearly with the rear surface of the fire damper. In such manner, the rear surface of the sleeve assembly and the rear surface of the fire damper are constrained to rest substantially flat against the construction wall installation in a way so as to prevent the snaking around of flames to enter into ductwork within the wall in otherwise by-passing the fire damper protector.

REFERENCES:
patent: 3960065 (1976-06-01), McCabe
patent: 4524678 (1985-06-01), Klebanoff
patent: 4579047 (1986-04-01), Zielinski
patent: 4754696 (1988-07-01), Sarazen et al.
patent: 4815364 (1989-03-01), Wagner et al.
patent: 5014610 (1991-05-01), Twito
patent: 5338255 (1994-08-01), Akehurst

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