Drug injection device
US11696987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2022 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | May 11, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/27
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drug injection device includes a housing with a cartridge having a predetermined drug volume, a dose setting mechanism for setting a drug dose, and a dose delivery mechanism. A dose setting service element rotates about a longitudinal axis during the drug dose setting. The dose setting mechanism has a last dose setting device to prevent setting of a drug dose greater than the drug volume remaining in the cartridge. The last dose setting device includes a pinion coaxial with the longitudinal axis that rotates about the longitudinal axis with the dose setting service element during drug dose setting, and a rack engaged with the pinion that moves parallel to the longitudinal axis when the pinion rotates. The pinion and the rack have mutual abutment elements that prevent further rotation of the pinion after the rack has travelled an axial length correlated to the predetermined drug volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.