发明名称 Pulling attachment for plastic pipe and slip lining head
摘要 The present invention is directed to an attachment for a plastic pipe, usually polyethylene pipe, to a head for pulling the pipe into a sewer or other utility line. The present invention is also directed to a slip lining head. More specifically, the present invention is directed to a slip lining head which includes the unique attachment for a plastic pipe used in the repair/replacement of sewer and other utility lines.
申请公布号 US5642912(A) 申请公布日期 1997.07.01
申请号 US19940327556 申请日期 1994.10.24
申请人 TTI TRENCHLESS TECHNOLOGIES, INC. 发明人 PARISH, II, ROBERT O.
分类号 B66C1/56;E21B31/20;(IPC1-7):E21B31/12;B66C1/10 主分类号 B66C1/56
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