Injection device
US8641683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2012 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Feb 28, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3152
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An injection device for injection of set doses of medicine from a cartridge has a nut that is screwed up along a threaded piston rod during a dose setting operation. The nut is screwed along the piston rod by rotating a dose setting member. A rotational coupling mechanism includes an axially displaceable coupling member which is rotated as a function of axial displacement. During dose setting, the nut is allowed to rotate relative to the coupling member. During injection, the coupling member is rotationally locked to the nut. This provides a dose setting and injection mechanism wherein the nut member is both rotated during dose setting and during injection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.