Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Avraham Shekalim0
Date of Patent
September 20, 2011
0Patent Application Number
105584090
Date Filed
May 30, 2004
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A drug delivery device (10) includes a pressurized reservoir (14) in communication with a flow path to an outlet (12). The flow path includes two normally-closed valves (16, 18) and a flow restriction (18). A pressure measurement arrangement (22) measures a differential fluid pressure between two points (24, 26) along the flow path which span at least part of the flow restriction (18), one of the points being between the valves (16, 18). A controller (28) selectively opens the valves (16,18) to deliver a defined quantity of the liquid medicament to the outlet (12).
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