发明名称 |
Live service pipe insertion apparatus and method |
摘要 |
An apparatus and method for inserting a new service pipe into an existing service pipe without the necessity of excavation or separately shutting off the supply of gas upstream of the effected pipe section comprises of a nosecone allowing a flow of sealer to travel back through an annular space between the new pipe and the old pipe, providing a gas tight permanent seal.
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申请公布号 |
US6024515(A) |
申请公布日期 |
2000.02.15 |
申请号 |
US19970811521 |
申请日期 |
1997.03.04 |
申请人 |
NICOR TECHNOLOGIES INC. |
发明人 |
KONWINSKI, GREG;BARRETT, ROBERT;RE, CHARLES;DOCTOR, RANDALL;POSKOCIL, FRANK;FRED, JOHN;PIETRAMALE, ANTHONY |
分类号 |
F16L55/165;(IPC1-7):E02F5/10;F16L55/16 |
主分类号 |
F16L55/165 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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