Method of expanding an intermediate portion of a tube using an outward radial force
US6701764B2 · kind B2 · utility
27Cited by
13References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2001 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | May 22, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49805
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of making a tube having an expanded region which includes the steps of providing an elongated metal tube, preparing the tube to be expanded, and, exerting a generally uniform outwardly radial force to create the expanded region. During the preparation step, a region of the tube is annealed by applying heat. The outward radial force may be created by pressurizing the tube, by freezing water within the tube or by axially rotating the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.