Patent ID: 7998116
Filing Date: 2011-08-16
Classification: A61M

Abstract:
1. A wearable medicine dispensing device, comprising: a housing that defines a cavity to receive a separate medicine-filled container such that an output end of the container is positioned away from a piston rod; the piston rod being arranged in the housing and being movable in a forward direction toward the medicine-filled container when the medicine-filled container is received in the cavity; a drive mechanism arranged in the housing to advance the piston rod in the forward direction, the drive mechanism comprising a pawl and a ratchet wheel, the pawl positioned to engage at least one of the teeth of the ratchet wheel, wherein the pawl reciprocates between a first position and a second position to incrementally rotate the ratchet wheel, wherein rotation of the ratchet wheel in a drive direction causes a linear advancement of the piston rod; a reversible motor coupled to the drive mechanism such that rotation of the reversible motor urges the pawl toward one of the first and second positions; and a battery connected to the reversible motor so as to provide power to rotate the reversible motor in a first direction and in a second reverse direction, wherein one cycle of rotation of the reversible motor in the first direction and in the second reverse direction cause the ratchet wheel to be advanced by one tooth corresponding to displacement of the pawl between the first and second positions.