Auto-injector
US9656021B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2012 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | May 9, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32501
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An auto-injector for administering a dose of a liquid medicament is presented that has a tubular chassis telescopable in a tubular case, a carrier subassembly comprising a tubular carrier slidably arranged relative to the chassis inside the case, where the carrier adapted to contain a syringe with a hollow injection needle. The injector has a drive spring and a plunger for forwarding load of the drive spring to a stopper of the syringe, wherein the syringe is lockable for joint axial translation with the carrier. There is also a trigger button arranged distally or laterally in or on the case, a control spring arranged around the carrier, and a needle extension control mechanism for coupling a proximal end of the control spring to either the carrier for advancing it for needle extension or to the chassis for needle retraction depending on the relative axial position of the carrier and the chassis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.