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    • 2. 发明授权
    • Fire rated wall damper assembly
    • 防火墙壁风门组件
    • US5957772A
    • 1999-09-28
    • US62622
    • 1998-04-20
    • Francis RutkowskiDaniel Duff
    • Francis RutkowskiDaniel Duff
    • A62C2/14A62C2/06
    • A62C2/14
    • 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.
    • 具有位于建筑物壁装置内的对准或格栅扩散器后方的围绕框架的防火阻尼器固定地固定到具有与防火阀的后表面基本上直线对准的后表面的套筒组件。 以这种方式,套筒组件的后表面和消防阀的后表面被约束为以一定的方式基本上平坦地抵靠施工壁安装,以防止火焰周围的蛇形进入壁内的管道系统 否则旁路防火保护器。