Patent ID: 6418924
Filing Date: 2002-07-16
Classification: A61M,B05B

Abstract:
A drug delivery device for delivery of a fluid carrying or comprising a therapeutic agent said device comprising: a reservoir for storing said fluid, and in fluid connection therewith a regulatable pump means for dispensing said fluid via an outlet means; wherein a control means is further provided for selectively controlling a pumping mode of said pump means such that in a first mode said pump means acts to dispense said fluid and in a second mode said pump means acts such that substantially no fluid is dispensed wherein said pump means is primed in said second mode such that the device can be primed without loss of medication of fluid,said pump means including a selectively controllable bypass valve which has a dual mode of operation, in a second mode when said bypass valve is opened, fluid in said reservoir is diverted from an exit portion of said reservoir to a storage portion of said reservoir, said bypass valve including, an aperture covered by a flexible membrane allowing the passage therethrough or thereby of therapeutic fluid when said bypass valve is in said second mode.