Long fatigue life nitinol
US7455738B2 · kind B2 · utility
11Cited by
32References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2003 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Nov 24, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2400/16
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A high fatigue life superelastic nickel-titanium (nitinol) wire, ribbon, sheet, tubing, or the like is disclosed. The nitinol has a 54.5 to 57.0 weight percent nickel with a balance of titanium composition and has less than 30 percent cold work as a final step after a full anneal and before shape setting heat treatment. Through a rotational beam fatigue test, fatigue life improvement of 37 percent has been observed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.