Integral threaded assembly of two metal tubes
US6349979B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Jun 13, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/004
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An integral threaded connection of two metal tubes includes a male element and a female element, each of the elements including a bearing surface, a tapered threading, a sealing surface, and an end surface. The end and bearing surfaces are flat and perpendicular to the XX connection axis. The male sealing surface is separated from the male threading by a lip that has an external tapered lip surface whose amount of taper is equal to that of the male threading and has a generatrix which is substantially a roughly extension of the tangent to the male thread roots. The distance between the end and bearing surfaces of a same element is adapted to the corresponding distance on the other element so that at the end of connection, the inner pair of bearing surfaces is abutted first.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.