Patent ID: 9381300
Filing Date: 2016-07-05
CPC Classification: A61M,Y10T

Claim Text:
1. An infusion pump assembly for use with a medicament cartridge including a reservoir and a plunger, the assembly comprising: a housing having a medicament cartridge receiving area; a plunger pusher having a home position and movable in and out of the cartridge receiving area; a drive mechanism, including a motor, that drives the plunger pusher; and a controller that automatically causes the motor to withdraw the plunger pusher out of a medicament cartridge in the cartridge receiving area and return the plunger pusher to the home position both (a) after receiving a signal from an encoder indicating that a predetermined number of rotation counts of the motor, which indicate that the reservoir is empty, has occurred and (b) when the medicament cartridge is properly positioned within the cartridge receiving area and there is a lack of encoder signals during a medicament delivery operation.