Live service pipe insertion apparatus and method
US6024515A · kind A · utility
12Cited by
56References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1997 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Mar 4, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/1657
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.