Infusion device having gear assembly initialization

摘要

Apparatus are provided for infusion devices and related operating methods. An exemplary infusion device includes a housing to receive a shaft coupled to a plunger disposed in a reservoir and a gear assembly including a first gear to engage the shaft, wherein the first gear exhibits rotational freedom in a direction opposite a delivery direction. One exemplary method of operating the infusion device comprises identifying a reset condition and in response to the reset condition, operating a motor having a rotor coupled to the gear assembly to provide the rotational freedom for the first gear.

主权项

1. An infusion device comprising:
a housing to receive a shaft coupled to a plunger disposed in a reservoir; a gear assembly including a first gear to engage the shaft and a worm gear coupled to the first gear, the first gear having rotational freedom in a direction opposite a delivery direction, the worm gear exhibiting axial displacement in a first direction in response to rotation of the first gear in the direction opposite the delivery direction; a force sensor aligned with an axle of the worm gear; a motor having a rotor coupled to the gear assembly; and a control module coupled to the motor to operate the motor to displace the axle of the worm gear in a second direction opposite the first direction and away from the force sensor in response to the reset condition.