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公开(公告)号：US07966772B2
公开(公告)日：2011-06-28
申请号：US11798654
申请日：2007-05-16
IPC分类号： E04H12/00
CPC分类号： E04H12/2269 , E02D17/04 , E02D29/14 , E04G21/3204
摘要： A tubular insert sleeve for an excavated hole and a safety cover fitted to cover an operatively upper end of the insert sleeve are provided to maintain the integrity of an excavated hole and limit access to the hole in order to improve the safety of the public. The sleeve is made of cooperating segments which can easily be separated and which a form a sleeve when assembled. The operatively upper end of the assembled sleeve forms an outwardly extending bell-shaped end of greater outer diameter to define an outwardly extending flange which is more easily grasped for removal of the sleeve from an excavated hole.
摘要翻译： 提供用于挖掘孔的管状插入套筒和安装成覆盖插入套筒的可操作上端的安全盖，以保持挖掘孔的完整性并限制进入孔的通路，以便提高公众的安全性。 套筒由配合的片段制成，它们可以容易地分离，组装时形成套筒。 组装的套筒的可操作的上端形成更大外径的向外延伸的钟形端，以限定向外延伸的凸缘，该凸缘更容易被抓住以从开挖的孔中移除套筒。
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公开(公告)号：US20070295421A1
公开(公告)日：2007-12-27
申请号：US11798654
申请日：2007-05-16
IPC分类号： F16L55/115
CPC分类号： E04H12/2269 , E02D17/04 , E02D29/14 , E04G21/3204
摘要： A tubular insert sleeve for an excavated hole and a safety cover fitted to cover an operatively upper end of the insert sleeve are provided to maintain the integrity of an excavated hole and limit access to the hole in order to improve the safety of the public. The sleeve is made of cooperating segments which can easily be separated and which a form a sleeve when assembled. The operatively upper end of the assembled sleeve forms an outwardly extending bell-shaped end of greater outer diameter to define an outwardly extending flange which is more easily grasped for removal of the sleeve from an excavated hole.
摘要翻译： 提供用于挖掘孔的管状插入套筒和安装成覆盖插入套筒的可操作上端的安全盖，以保持挖掘孔的完整性并限制进入孔的通路，以便提高公众的安全性。 套筒由配合的片段制成，它们可以容易地分离，组装时形成套筒。 组装的套筒的可操作的上端形成更大外径的向外延伸的钟形端，以限定向外延伸的凸缘，该凸缘更容易被抓住以从开挖的孔中移除套筒。
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