公开(公告)号：US5511898A

公开(公告)日：1996-04-30

申请号：US320295

申请日：1994-10-11

申请人： Martin C. Pettesch ,  Michael P. Breheny ,  Christopher M. Andrews ,  Thomas G. Nelson ,  Joseph V. Milo

发明人： Martin C. Pettesch ,  Michael P. Breheny ,  Christopher M. Andrews ,  Thomas G. Nelson ,  Joseph V. Milo

IPC分类号： E02D29/14

CPC分类号： E02D29/1418

摘要： A manhole includes a carriage mounted on the underside of the cover that cooperates with a supporting guide channel located across the mouth of the manhole. the guide channel can be rotated to an incline so that the carriage can easily roll onto and from the supporting guide member. The free end of the guide channel is raised and lowered by a standard ratchet wrench inserted through the cover so that the operator need not lift any part of the cover manually. Once raised to the ready position, the operator simply pulls laterally on the cover handle to roll the cover slightly upward and laterally from the manhole opening. Once the cover clears the manhole, the guide channel can be rotated up and outward to provide access to the entire manhole area , if desired. To replace the cover, the guide channel is rotated to again extend across the manhole, the cover/carriage assembly is rolled laterally on to the guide channel until the cover edge contacts the ring edge. The channel is then lowered with use of the tool to seat the cover on to the manhole ring. The operator at no time manually lifts the cover. The guide channel precisely orients the cover when moved to the closed position.

摘要翻译： 人孔包括安装在盖的下侧上的滑架，其与位于人孔口的支撑引导通道配合。 引导通道可以旋转到倾斜，使得滑架能够容易地滚动到支撑引导构件上和从支撑引导构件滚动。 引导通道的自由端通过插入通过盖的标准棘轮扳手升高和降低，使得操作者不需要手动提起盖的任何部分。 一旦抬起到就绪位置，操作者简单地在盖手柄上侧向拉动，以便从人孔开口稍微向上和向外滚动盖。 一旦盖子清除了检修孔，引导通道可以向上和向外旋转，以便在需要时提供对整个人孔区域的通路。 为了更换盖子，引导通道被旋转以再次延伸穿过人孔，盖/托架组件横向滚动到引导通道，直到盖边缘接触环形边缘。 然后使用工具降低通道，将盖子安放在人孔环上。 操作人员随时手动提起盖子。 当移动到关闭位置时，引导通道精确定位盖。