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1. 发明授权

US4919564A Manhole insert 失效
标题翻译：人孔插入
公开(公告)号：US4919564A
公开(公告)日：1990-04-24
申请号：US284620
申请日：1988-12-15
申请人： David L. Neathery , Harold E. Owen, II
发明人： David L. Neathery , Harold E. Owen, II
IPC分类号： E02D29/14
CPC分类号： E02D29/14 , Y10S277/921
摘要： A watertight manhole insert which is characterized by a dish-shaped seal or stopper designed to prevent rainwater from entering a sanitary sewer system through a manhole closed by a manhole cover. The manhole insert is located beneath the manhole cover and serves to plug the manhole and prevent flooding of the underlying sewer system. The manhole insert is characterized by a dish-shaped bowl having a pressure-relief valve, an optional vacuum relief valve and left strap and a substantially perpendicular, upward-standing side wall fitted with an outwardly-extending top rim for engaging a shoulder shaped in a manhole to support the manhole insert. Multiple, upward-standing bottom ribs radiate from the side wall inwardly in the curved bowl bottom toward the pressure relief valve, which is normally located in the center of the manhole insert, in order to stiffen the bowl-shaped bottom. Optional side ribs may also be provided in the vertical side wall for stiffening purposes. In a preferred embodiment the rim is sandwiched between two parallel elements of a ribbed rubber seal which is locked into the rim, the top of which seal receives the manhole cover and the bottom of which includes spaced seal ribs which engage the manhole shoulder and act as water barriers.
摘要翻译：一个水密的人孔插入物，其特征在于一个碟形密封或塞子，其设计用于防止雨水通过人孔盖关闭的人孔进入卫生下水道系统。人孔插入物位于人孔盖下方，用于堵塞人孔并防止底层下水道系统的淹水。人孔插入物的特征在于具有减压阀，可选的真空释放阀和左带以及基本上垂直的向上竖立的侧壁的碟形碗，该侧壁装配有向外延伸的顶部边缘，用于接合形状为一个人孔来支撑人孔插入物。多个上升的底部肋条从弯曲的碗底部向内的侧壁辐射到通常位于人孔插入件中心的压力释放阀，以便加强碗形底部。也可以在垂直侧壁中设置可选的侧肋，用于加固目的。在优选实施例中，边缘被夹在肋状橡胶密封件的两个平行的元件之间，其被锁定到边缘中，其顶部的密封件容纳人孔盖，并且其顶部包括间隔开的密封肋，其接合人孔肩并作为水障碍

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