Conduit coupling
US4076280A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1976 |
| Grant date | Feb 28, 1978 |
| Priority date | — |
| Expiry date | Jun 21, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L19/045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A tubular body portion has an internally threaded portion and a cylindrical portion and includes an annular recess portion therebetween. The annular recess portion includes a first shoulder adjacent the threaded portion and a second shoulder adjacent the cylindrical portion. A circumferential cutting edge portion is provided at the juncture of the second shoulder and the adjacent cylindrical portion. A first conduit to be joined is extended through the cylindrical portion into substantially abutting relation with the first shoulder. A suitable expanding tool expands the end portion of the first conduit outwardly into the annular recess portion and against the cutting edge to produce a distinct gouge or circumferential cut therein. The coupling remains rotational relative to the first conduit with the end portion thereof expanded into the annular recess portion. A second conduit to be joined is threadedly advanced into the threaded end portion of the coupling by rotation of the coupling. The second conduit moves into underlapping relation with the expanded end portion of the first conduit and on continued advance urges the expanded end portion into further abutting relation with the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.