End-of-dose detection for drug delivery system
US11439767B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2018 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Apr 20, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3128
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drug delivery system having an end-of-dose detection arrangement for injecting a medicament. The system including a container configured to receive a medicament, a drive assembly which, upon actuation, is configured to expel the medicament from the container, a needle for injecting the medicament to a patient, a needle actuator assembly comprising a movable portion biased by a biasing member and configured to move the needle between a pre-use position, a use positon for delivery of the medicament to the patient, and a post-use position after delivery of the medicament is completed, and a tube in fluid communication with the container and the needle, the tube comprising an expandable portion having an expanded state and a non-expanded state, wherein the expandable portion is configured to be in the expanded state upon actuation of the drive assembly and a non-expanded state when the needle is in the post-use positon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.