Drug infusion device
US7524304B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2004 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Nov 20, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/14513
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention provides a drug delivery infusion device comprising an injection means (18) in fluid connection with a drug reservoir chamber (12) and pressure-generation means (10) coupled to both the drug reservoir (12) and to a liquid-filled control chamber (13), wherein the coupling is such that the liquid-filled control chamber (13) serves to constrain the motion of the pressure-generation means (10), thereby controlling the drug infusion rate, wherein the liquid-filled control chamber (13) is associated with means for controlled depletion of the liquid therein whereby depletion of the volume of liquid in the control chamber enables the pressure-generation means to drive the drug in the reservoir chamber therefrom for infusion thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.