Cover for liquid delivery system with integrated plunger position sensing, and corresponding method
US10702658B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 2016 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Nov 17, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/502
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sliding cover for a liquid delivery device, such as a cap (100) for a pen injector (200), incorporates a set of sensors including a first optical sensor (110) with an output which changes during uncapping or capping motions on passing of a plunger (220) of the pen injector. This output is used together with at least one additional sensor output to determine the position of the plunger along a cylinder (210) of the liquid delivery device. By monitoring changes in the plunger position, the quantity of dosages delivered by the liquid delivery device can be determined, displayed, stored and/or transmitted to an external device for further data processing or storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.