Medicament delivery device
US9937297B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2014 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | May 3, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/582
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medicament delivery device includes a housing; a hollow plunger rod; a dose drum concentrically arranged between the housing and plunger rod and movable when setting and delivering a dose; and a plunger rod driver. The driver includes a hollow ratchet arm drum movably arranged within the plunger rod and fixed to the dose drum, with the arm drum and rod releasably coupled; a dose activator having a longitudinal rod movably arranged within and releasably coupled to the arm drum; a dose setting knob fixed to the dose activator and releasably coupled to the arm drum; and a resilient element arranged between the arm drum and dose activator that biasses them in a direction decoupling the longitudinal rod from the arm drum and coupling the knob with the arm drum, such that during dose setting, turning the knob forces the arm drum and dose drum to rotate together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.