Vent collar for plastic lined pipe
US5149142A · kind A · utility
9Cited by
11References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1988 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Sep 30, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L23/125
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a lined pipe, permeated gases trapped between the liner and the outer casing are vented by a collar received between the liner flange and the pipe flange which defines at least one predetermined channel through which the gases may exit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.