Threaded assembly of metal tubes designed to contain a corrosive fluid
US6312024A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1999 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Nov 24, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L58/182
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An integral or threaded and coupled connection between two metal pipes which are provided with an internal coating to contain a corrosive fluid. The male part of the connection includes a threaded portion and a non-threaded portion with the non-threaded portion having a metal sealing surface, an annular transverse bearing surface and a nose surface. The nose surface joins the internal peripheral surface of the pipe by way of an annular radial surface termed the internal end. The female part contains corresponding elements. A sealing ring is interposed between the annular internal end surfaces to prevent the liquid phase from penetrating into the connection. Male metal sealing surfaces are provided between the treaded portion and the bearing surface. A clearance is provided between the external peripheral surface of the nose and the facing internal reinforcing peripheral surface on the female part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.