Polymeric pipe deformer
US5525049A · kind A · utility
Inventor
Key dates
| Filing date | Mar 11, 1994 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Mar 11, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C67/0014
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for deforming polymeric pipe to have a reduced diameter for insertion into new or damaged pipelines in situ. A further method for converting existing pipelines in situ to dual-containment pipelines. The apparatus includes a plurality of adjustable rollers and conveyor systems in a portable unit which accommodates variable pipe specifications. As a polymeric pipe is conveyed through the apparatus, a deforming means applies a gradually increasing pressure along the length of the pipe to collapse the pipe and form a longitudinal depression therein while preventing rotation of the pipe. The deformed pipe exits the apparatus after being shaped into a cylindrical form with a reduced diameter. When lining pipe, the deformed pipe is inserted into an existing pipeline and returned to its original cylindrical form. When converting to dual-containment pipelines, the deformed pipe will have a plurality of spacers attached thereon such that when the pipe is inserted and reformed it will be axially aligned within the existing pipeline providing an annular space between the existing pipe and the inserted pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.