RFID dose tracking mechanism for injection devices
US11865312B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2018 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Nov 17, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/60
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Described is a dose tracking mechanism for a drug delivery device, including a moveable component configured to move with respect to a housing during operation of the drug delivery device and an RFID device with an electric circuit having a resonance frequency. The electric circuit includes an antenna configured to transmit a wireless RFID signal at the resonance frequency and an electrical component operatively coupled to the moveable component and configured to modify the resonance frequency based on a position of the moveable component, such that the resonance frequency of the electric circuit is an indication of the position of the moveable component. In some instances, the position of the moveable component indicates a dose set or dispensed from the drug delivery device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.