Auto-injector
US8632507B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 2009 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Aug 2, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/2488
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An auto-injection device has a housing with a medicament container disposed within; a dose setting mechanism for setting a dose of a medicament; a drive nut and a plunger rod operably connected, with an energy accumulator operably connected to the dose setting mechanism; and an activating mechanism and a positioning mechanism operably connected to the plunger rod for locking the plunger rod from being displaced. The positioning mechanism includes a locking nut arranged to cooperate with fixed, flexible locking features for locking the locking nut from rotation. A resilient member arranged inside the plunger rod is configured to allow the plunger rod to be resiliently and axially displaced when the locking nut is unlocked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.