Pen type drug injection device with absolute angular dose encoder mechanism
US11484658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2020 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Nov 1, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/773
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drug delivery device comprising: a housing; a cylindrical member rotatably supported within the housing; and a plurality of sensors; wherein: the outer surface of the cylindrical member is provided with a single track, the track forming an encoder and having a plurality of first track segments and a plurality of second track segments arranged along the length of the track which are respectively capable of inducing first and second responses in the sensors; and in each rotational position of the cylindrical member relative to the housing at least one different first track segment is capable of inducing a first response in at least one said sensor, thereby enabling the rotational position of the cylindrical member relative to the housing to be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.