Lining of passageways
US4385885A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1981 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Mar 3, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C63/36
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides that a flexible liner is everted into a passageway to line same using liquid under pressure. The liner is fed through an enclosure before it everts and eversion is achieved by pressurization of the liquid in the enclosure. The feed of the liner through the enclosure is preferably controlled by the drivable feed rollers through a nip of which the liner passes. The rollers preferably have projections which engage the liner positively to engage the liner. The invention has particular applicability to the placement of liners which although flexible and evertible when being installed, set hard when in position lining the passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.