Sealed tubular joint comprising local and initial added thickness(es) by means of plastic expansion
US7931311B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2004 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Apr 12, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/004
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An expandable tubular joint including a male element with a male thread, a first annular lip having a first axially abutting surface, a first inner surface and a first outer surface, and a second abutting surface; and a female element with a female thread, a second annular lip having a third abutting surface, a second outer surface and a second inner surface, and a third inner surface and a fourth axially abutting surface which, together with the second outer surface, defines a first annular housing. The male tubular element includes a local added thickness at a fourth inner surface projecting out from the second abutting surface. After screwing, the first lip is housed in the annular housing and the abutting surfaces rest against one another, in order to enable the formation of an annular shoulder at the first outer surface during diametral expansion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.