Injection device end of dose indicator
US11369745B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2019 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Jun 26, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/581
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed is an injection device including a body for receiving a syringe, a firing mechanism including a reaction component, a plunger configured to be axially displaced in a forward direction relative to the reaction component, and a drive spring located between the reaction component and the plunger for driving the plunger forwards upon activation of the injection device, wherein the reaction component provides a reaction surface for the drive spring. The device further includes a locking mechanism for locking the reaction component in a first axial position within the body, the locking mechanism being configured to release the reaction component upon a predefined forward movement of the plunger thereby allowing the reaction component to be driven in a rearward axial direction by the drive spring until it impacts against the body or a component secured to the body to thereby emit an audible indication of an end of dose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.