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    • 3. 发明申请
    • Four parts manhole enabling an easy install and height adjustment
    • 四个配件孔,方便安装和高度调节
    • US20070081857A1
    • 2007-04-12
    • US11245810
    • 2005-10-07
    • Jung Yoon
    • Jung Yoon
    • E02D29/14
    • E02D29/14E02D29/124
    • A manhole comprised of four parts is provided. The manhole is comprised of an outer-manhole pipe, an inner-manhole pipe, a manhole cover, and a support pipe. Pluralities of concave arc band shape blades are horizontally developed along the inner surface of the outer manhole pipe. Same number of convex arc band shape blades is horizontally developed along the outer surface of the inner manhole pipe. The inner-manhole pipe is inserted into the outer-manhole pipe vertically when the two kinds of arc shape blades aligned to make pass way for each other. When a desired height is reached, workers rotate the inner-manhole pipe 60 degrees horizontally and put down the inner-manhole pipe. Then the two kinds of blades are overlapped and fix the height of the manhole cover. A support pipe, comprised of two pieces of equal hemi-pipe connected one end, is engaged between the top flange of the inner-manhole pipe and top end of the outer manhole pipe to hold and support the distance between them.
    • 提供由四部分组成的人孔。 井眼由人孔管,人孔管,人孔盖和支撑管构成。 多个凹弧形刀片沿外管孔的内表面水平展开。 相同数量的凸弧形刀片沿内管孔的外表面水平展开。 当两种弧形刀片对齐以使彼此通过时,内孔管被垂直地插入外管井管内。 当达到所需的高度时,工作人员将人孔管内水平旋转60度,放下管内管。 然后将两种叶片重叠并固定在人孔盖的高度上。 由连接在一端的两个相等的半管构成的支撑管被接合在内管孔的顶部凸缘和外部管孔管的顶端之间,以保持和支撑它们之间的距离。