Threaded joint for metal tubes with internal coating
US5906399A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L58/182
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention concerns threaded joints for tubes, having a layer intended in particular to protect the tubes and the joints from corrosion or to improve the conditions for a flow of fluids. The joint comprises two tubular threaded components each provided with a radial annular surface. The internal wall of the components and the annular surfaces are covered with a layer. The shape of the annular surfaces is such that in the screwed state those surfaces are partially in abutment contact at their external portion, their internal portion creating a progressive opening zone which is at least partially filled by the layers of the two components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.