Metal-to-metal wedge thread coupling connector
US4712815A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1984 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/003
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A tubular connector for adjoining two adjacent joints comprising a first pin end on a first joint, a second pin end on a second joint and a tubular coupling member with suitable threads for mating with both pin ends. Each pin end is tapered and includes wedge threads. The wedge threads achieve a metal-to-metal seal upon makeup by providing a root-and-crest bearing surface prior to makeup. As an addition, a metal-to-metal conical seal can be provided in front of the most forward thread revolution on the pin ends. Further as an addition, an elastomeric seal can be provided in a circumferential groove just forward of the conical seal for making a compound seal therewith. A corrosion barrier ring can be included in the coupling member for filling the gap between the tip ends of the two pin ends being joined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.