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    • 5. 发明授权
    • Propeller vent plug with fluid passage
    • 带流体通道的螺旋桨排气塞
    • US5916003A
    • 1999-06-29
    • US971350
    • 1997-11-17
    • Paul A. MasiniMichael P. MihelichWilliam P. Lang
    • Paul A. MasiniMichael P. MihelichWilliam P. Lang
    • B63H1/18B63H1/20B63H1/28B63H21/10
    • B63H1/20B63H1/28B63H20/245
    • A propeller device is provided with vent apertures and plugs which fit into the vent apertures to be retained in position during use of the propeller device. The vent plugs are provided with openings therethrough so that fluids can flow from a region within a hub of the propeller device to a region proximate the outer cylindrical surface of the hub. The fluids flowing from the internal portion of the hub flow towards regions of low pressure near the propellers. The plugs can be changed to modify the size of the ventilation aperture without having to change the propeller device itself. One embodiment of the plug is provided with a moveable cover that closes the opening progressively in response to increasing rotational speed of the propeller device.
    • 螺旋桨装置设置有通风孔和塞子,其配合到通风孔中,以在螺旋桨装置的使用期间保持在适当的位置。 排气塞具有穿过其的开口,使得流体可以从螺旋桨装置的轮毂内的区域流到靠近毂的外圆柱形表面的区域。 从轮毂内部流动的流体向螺旋桨附近的低压区流动。 可以改变插头以改变通风孔的尺寸,而不必改变螺旋桨装置本身。 插头的一个实施例设置有可移动盖,其可响应于螺旋桨装置的转速的增加而逐渐关闭开口。