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 controlled chamber (13), wherein the coupling is such that...http://www.google.co.uk/patents/US20060079862?utm_source=gb-gplus-sharePatent US20060079862 - Drug infusion device
