Auto-injection device with needle protecting cap having outer and inner sleeves
US9770558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2005 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Oct 6, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3215
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An injection device is described having a housing that receives a syringe having a boot that covers its needle. The syringe is biased by a return spring from an extended position to a retracted position. A drive spring advances the syringe from its retracted position to its extended position. A return spring restores the syringe to its refracted position. A releasable locking mechanism retains the syringe in its refracted position. A sleeve can be depressed to release the locking mechanism. A cap covers the sleeve, thus preventing the locking mechanism from being released. When the cap is removed, it takes the boot with it and no longer prevents the locking mechanism from being released. Then, the locking mechanism can be released and the injection cycle begun.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.