Method for manufacturing metallic bellows
US7399372B2 · kind B2 · utility
4Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2004 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Mar 7, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2201/61
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A metallic bellows, composed of precipitation hardening stainless steel, includes ridge portions and valley portions formed alternately and continuously, an average grain size of 10 to 15 μm, and compressive residual stress of not less than 500 MPa provided to at least surfaces of the ridge portions and the valleys by surface working.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.