Reusable injection device for distributing a preselected dose
US5244465A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Mar 5, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/2488
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe-type injection device for dispensing a preset dose of a liquid drug includes two sleeve-like components releasably connected with each other so as to be aligned in axial direction. One of the sleeve-like components is a holder for a dispensing mechanism and the other of the sleeve-like components is adapted to accommodate an ampoule and a cannula. The dispensing mechanism includes an axially movable piston rod for actuating a plug of the ampoule. The piston rod has a radially projecting cam follower and the holder defines at least one axially extending slot having a predetermined length, wherein the cam follower is received by the at least one slot, such that only a single dose can be dispensed from an ampoule by an axial movement of the piston rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.