Couplings for non-ferrous pipe
US4537426A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1982 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Jun 24, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S285/915
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A non-ferrous pipe coupling comprises tubular threaded male and female coupling elements attached to ends of respective pipe sections. The male element terminates in a cylindrical non-threaded, non-tapering sealing surface adjacent its threads and the female coupling element, which may be filament-wound, includes an internal sealing sleeve or liner with a web that provides a lip seal around the cylindrical sealing surface of the male element. The web is urged into sealing engagement with the cylindrical surface by fluid pressure within the coupling. The liner precludes egress of fluid from within the coupling through the female coupling element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.