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    • 3. 发明授权
    • Fire responsive closing air vent
    • 防火响应关闭通风口
    • US6022271A
    • 2000-02-08
    • US888377
    • 1997-07-07
    • Vincent C. Biondo
    • Vincent C. Biondo
    • A62C2/24F24F11/76F24F11/053
    • F24F11/053A62C2/242F24F2011/0098
    • A fire responsive, closing air vent includes a main frame enclosing an air flow passageway with a hingeable cover connected to the main frame which can open and close. The frame has a mechanism for biasing the cover towards the closed position and a preformed mass of material, e.g. meltable wax positioned at least in part between the frame and the cover to hold the cover in the open position. The material is at least partially moveable (e.g., shrinkable or meltable) in response to an increase in ambient temperature in excess of 140.degree. F. so as to cease from holding the cover in an open position and permitting the weight to close the cover. In one embodiment, the vent is made up of a flat plate and a subframe for insertion into a building structure and is positioned at right angles to the flat plate. In another embodiment, the main frame of the closing air vent has a plurality of air passageways and the cover is capable of covering all of the air passageways.
    • 防火响应的关闭通气口包括封闭气流通道的主框架,其具有连接到主框架的可铰接盖,其可以打开和关闭。 框架具有用于将盖朝向关闭位置偏置的机构和预成型的材料块,例如, 可熔蜡至少部分地定位在框架和盖之间以将盖保持在打开位置。 响应于超过140°F的环境温度的增加,材料至少部分地可移动(例如,可收缩或可熔化),以便停止将盖保持在打开位置并允许重物关闭盖。 在一个实施例中,通风口由平板和用于插入建筑结构的子框架构成,并且与平板成直角定位。 在另一个实施例中,关闭通风口的主框架具有多个空气通道,盖子能够覆盖所有空气通道。