Rigid pipe connector with radially shiftable lock elements and method of making the same
US4124231A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 1977 |
| Grant date | Nov 7, 1978 |
| Priority date | — |
| Expiry date | May 4, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49945
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pipe connector has a pin initially stabbed into a box, the pin and box then being axially loaded together at confronting transverse surfaces while the pin and box are pressurized to expand the box and compress the pin, so that when the pressure is relieved a pressure energized shrink fit is provided and the connector is rendered rigid to enhance tensile, compressive and bending strength and provide a fluid tight joint useful in making up lengths of pipe such as piles and pipelines. Lock means hold the connector against axial separation to maintain the pin under axial compression and maintain the box under axial tension, including circumferentially spaced locking elements projecting radially from one of said pin and box into a locking recess of the other of said pin and box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.