Automatic feedback mechanism and a medicament delivery device with user feedback capability
US11116910B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2017 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Mar 15, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/582
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An automatic feedback mechanism for a medicament delivery device that notifies a user of a start of expulsion of medicament from a medicament container is presented where a plunger rod, a tubular extension member arranged to receive the plunger rod in the radial space, and wherein the tubular extension member has flexible tongues configured to releasably lock the plunger rod in a pre-tensioned state. The tubular operation member is arranged to receive the tubular extension member, where the tubular operation member in a first position is arranged to press the flexible tongues radially inwards to lock the plunger rod in the pre-tensioned state. A first resilient member is arranged inside the plunger rod to exert a force in the proximal direction. A signal generating member is arranged to partially surround the plunger rod such that movement of the signal generating member distally hits the inner distal surface generating an audible signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.