发明授权
- 专利标题： Tubular insert for excavated hole with safety cover
- 专利标题（中）： 带安全盖的挖掘孔的管状插入件
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申请号： US11798654申请日： 2007-05-16
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公开(公告)号： US07966772B2公开(公告)日： 2011-06-28
- 发明人: Bernard George Bartels , Darren Bernard Bartels , Marc Beaudry , Darren Van Buuren
- 申请人： Bernard George Bartels , Darren Bernard Bartels , Marc Beaudry , Darren Van Buuren
- 申请人地址： CA
- 专利权人： Super Sucker Hydro Vac Service, Inc.
- 当前专利权人： Super Sucker Hydro Vac Service, Inc.
- 当前专利权人地址： CA
- 代理机构： Carey Rodriguez Greenberg & Paul LLP
- 代理商 Steven M. Greenberg, Esq.
- 优先权： CA2547084 20060516
- 主分类号： E04H12/00
- IPC分类号： E04H12/00
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.
公开/授权文献
- US20070295421A1 Tubular insert for excavated hole with safety cover 公开/授权日：2007-12-27
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