发明名称 Outside drop for manhole
摘要 A collar for supporting or protecting pipes on an outside drop adjacent a manhole is provided. A plurality of stacked collar sections can protect pipes comprising the outside drop. Alternatively a plurality of collar segments having a circular wall within can form the pipe integrally with the collar. The collars can protect riser pipe sections or elbow piper sections. The collars may be split for ease of installation around pipes and fastened together around the pipe. The collars are easily attached to the manhole by drilling a hole into the manhole at designated places and using bolts through tabs on the collars to hold the collar in place adjacent the manhole. The collars can have several different standard heights and be stacked to the desired height of the manhole. Pipes having riser sections or elbow sections can have protective collars.
申请公布号 US6695002(B1) 申请公布日期 2004.02.24
申请号 US20030421181 申请日期 2003.04.23
申请人 ROYAL ENVIRONMENTAL SYSTEMS, INC. 发明人 TRANGSRUD JULIAN P.
分类号 (IPC1-7):E29D29/12 主分类号 (IPC1-7):E29D29/12
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