Treating pressure vessels
US6491182B1 · kind B1 · utility
6Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1997 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Jul 29, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2260/011
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pressure vessel has a cylindrical side wall and a closed end joined to the side wall at a knuckle. The fatigue resistance of the pressure vessel is improved by autofrettage which moves a region of peak stress from the internal surface of the vessel to a region within the knuckle. Preferred are pressurized gas vessels of 6000 or 7000 series aluminum alloys.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.