| 发明名称 |
METHOD OF FORMING CORRUGATED PIPE WITH A PIPE SPIGOT SEAL SEAT |
| 摘要 |
A piece of corrugated pipe cut from a longer length of pipe is provided with a pipe coupling part by subjecting one or more of the corrugation crests on the pipe to heat and pressure. This reshapes the one or more corrugations to form a seal receiving recessed spigot on the piece of pipe.
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| 申请公布号 |
CA2464245(C) |
申请公布日期 |
2007.12.04 |
| 申请号 |
CA20042464245 |
申请日期 |
2004.04.08 |
| 申请人 |
LUPKE, STEFAN A.;LUPKE, MANFRED A. A. |
发明人 |
LUPKE, STEFAN A.;LUPKE, MANFRED A. A. |
| 分类号 |
F16L47/00;B29C47/00;B29C57/00;B29D23/00;B29D23/18;F16L9/06;F16L9/12;F16L9/18;F16L11/11;F16L11/15;F16L25/00 |
主分类号 |
F16L47/00 |
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