Patent ID: 8758323
Filing Date: 2014-06-24
Classification: A61M,F04B,F16J,G06F,G16H

Abstract:
1. A method of venting a cartridge of an infusion pump system, comprising: providing an infusion pump system including: initiating a dispense cycle by driving the spool with the drive mechanism to a position with the collapsible first volume in communication with the reservoir inlet port; driving the spool so as to separate the first and second seals of the collapsible first volume and draw fluid into the first volume through the reservoir inlet port from the reservoir and decrease a pressure within the vented volume; driving the spool with the drive mechanism to a position with the collapsible first volume in communication with the fluid dispense port; driving the spool so as to at least partially collapse the collapsible first volume and dispense fluid from the collapsible first volume through the fluid dispense port; and driving the spool to a position with the vent second volume in simultaneous communication with the inlet vent port and vent inlet port to allow the vented volume to arrive at the same pressure as the vent outlet port.