Driving and dosing device for an injection device with a pretensioned driving spring
US10603443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2016 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Jun 15, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3126
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A driving and dosing device for an injection device for discharging a liquid product includes a housing, a rotatable dose adjustment member for adjusting a product dose to be discharged, a driven member received in the housing, a driving member rotatable relative to the housing and which, during the discharge of product, is coupled to the driven member such that a rotation of the driving member has the effect that the driven member is moved in the distal direction relative to the housing, a pretensioned driving spring which is switched between the dose adjustment member and the driving member during the adjustment of the product dose, wherein the dose adjustment member, during the adjustment of the product dose, is coupled in a rotationally fixed manner to the driving member, such that a rotation of the driving member relative to the dosing member is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.