Underground horizontal pipe installation method and apparatus
US5505558A · kind A · utility
Inventor
Key dates
| Filing date | Oct 11, 1994 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Oct 11, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/28
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Piping is laid horizontally underground, by horizontally entering a rod that is longer than the site, into the site, at the desired depth of the center of the piping tunnel, and then horizontally pushing that rod through the site, until its front end exits the back of the site. Then attaching three rods near the front end of the first rod, and bringing all four rods back through the site, until the first rod exits the front of the site, and the other three rods are embedded in their own paths in the site, with their front ends extending into the front of the site, and their back ends extending into the back of the site. Then, at the back of the site, attaching a push-pull type earth coring knife to the middle of the three rods, and connecting a front cutting and shielding means, between the two outer rods, so that it is situated immediately behind the front cutting portion of the coring knife. Then, placing a piece of the piping inside the back of the front cutting and shielding means so that it abuts the front cutting and shielding means and cannot be moved forward without it also moving the front cutting and shielding means forward. Then, placing a pulling and holding means over …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.