Patent ID: 9452261
Filing Date: 2016-09-27
CPC Classification: A61M

Claim Text:
1. A substance-administration apparatus, comprising: a housing; a needle, couplable to the housing, having a skin-insertion portion 0.3-2.5 mm in length and an outer diameter that is less than 0.23 mm; a dosage regulator coupled to the housing, which regulates a dosage of a substance expelled in a single injection through the needle, a single dosage from a plurality of selectable dosages being selectable by a user, the plurality of selectable dosages including at least one dosage that is less than or equal to 10 ul; an electromechanical motor automatically actuated by the dosage regulator in a pulsatile manner, the motor being drivingly coupled to a rotator, which rotates about a central axis thereof; an injection driver for driving the substance through the needle, the injection driver having a rotatable gear system drivingly coupled to the rotator; wherein actuation of the motor in the pulsatile manner rotates the rotator and the coupled gear system in the pulsatile manner, to, in turn, drive the injection driver in the pulsatile manner to automatically produce a series of bursts of pressure in the housing that expel the single selected dosage of the substance through the needle at a controlled rate.