Apparatus for laying a pipe line
US4094152A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1977 |
| Grant date | Jun 13, 1978 |
| Priority date | — |
| Expiry date | Apr 27, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D17/086
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Pipe-laying apparatus employs an advanceable shield with a set of elongate cutter planks supported for longitudinal displacement by a frame. Rams interconnect the planks and the frame and enable the shield to advance to form an open trench. Behind the shield is an open stabilizing frame connected with further adjusting rams to the frame of the drive shield. The frame serves to receive a pipe section which is to be aligned and connected to a previously-installed pipe section to extend the pipe line. A set of long follow-up planks are pivotably connected to the cutter planks and lie between the open frame and the trench walls. The follow-up planks extend over a distance equal to two or three times the length of the open frame and of the individual pipe sections to form a protection zone behind the open frame
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.