Reusable, spring driven autoinjector
US7381201B2 · kind B2 · utility
52Cited by
22References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2003 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Jun 24, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/0266
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides a reusable spring driven autoinjector. The drive mechanism of the autoinjector of the present invention includes one or more drive springs formed of a shape memory alloy. Therefore, by alternating the shape memory alloy forming the one or more drive springs between austenite phase before an injection and a martensite phase after injection, the reusable autoinjector of the present invention is capable of providing an injection force that is higher than the compressive force required to cock the drive mechanism in preparation for a subsequent injection operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.