Single-use pneumatic safety syringe providing gas-driven needle retraction
US7811259B2 · kind B2 · utility
10Cited by
59References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 2, 2005 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Mar 18, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3242
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pneumatic retractable syringe has a plunger having an interior retraction lumen. The plunger and syringe barrel have cooperating locking elements so that the plunger is locked after use within the syringe barrel. After injection of medicament is completed, the needle is retracted into the lumen by compressed gas that is released from a gas cell within the syringe when the gas cell is ruptured just before the plunger reaches the end of its downstream path of travel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.