Injection devices
US7229432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2002 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Aug 8, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3267
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
When the injection device is applied to a patient's skin and a plunger is pressed, the entire syringe and a carrier move forwards in relation to a barrel such that ribs on the carrier snap past a rib on a shroud. The syringe is arrested by flanges coming up against the rib, and a spring is compressed and a needle is fully projected. Further pressing on the plunger ejects the dose. The needle shroud is kept at the rearward position by its firm engagement around the injection area. On withdrawal of the device, the shroud is pushed forwards by the spring to protect the needle. This draws fingers through gaps in the ribs, the fingers being forced to bend towards the fingers as the divergence takes effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.