Drug delivery device with dose counting mechanism
US12115358B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2019 |
| Grant date | Oct 15, 2024 |
| Priority date | — |
| Expiry date | Feb 2, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3126
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drug delivery device includes a dose counting mechanism and an end-of-content or remaining-dose indication. For example, a dose expelling mechanism is coupled to a reciprocating element configured to undergo a predefined motion during each dose expelling action to allow a dose to be expelled. The predefined motion includes displacement in a first axial direction from a first position to a second position followed by displacement in a second axial direction from the second position to the first position, with a counter element being movable in the first axial direction. First and second unidirectional ratchet mechanisms prevent motion in the first axial direction and allow motion in the second axial direction of the reciprocating element relative to the counter element, and vice versa, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.