Priming mechanism for automatic injection device
US10300203B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 2017 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Aug 1, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/31576
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A priming mechanism for operating an automatic injection apparatus to ensure medication contents are properly delivered prior to a needled syringe of the apparatus being injected. The priming mechanism includes a push rod to move plunger(s) within the syringe; a releasable support including bendable supporting arms, which limiting motion of the syringe relative to an upper housing body before and during priming; and a recess element inside the lower housing body to release said bendable arm to allow motion of the syringe relative to the upper housing body in distal direction after priming. In one form, the priming mechanism is used for removing air bubble before injection to ensure delivering correct dose. In another form, the priming mechanism is used to mix different contents in a dual chamber syringe before injection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.