Patent ID: 7811252
Filing Date: 2010-10-12
Classification: A61F,A61M,Y10S

Abstract:
1. An injection device comprising: a dispensing chamber having an inner surface and an outer surface, the inner surface defining a cavity for receiving a quantity of a substance; a plunger engaged with the inner surface of the dispensing chamber, the plunger capable of sliding in the cavity of the dispensing chamber, the plunger fluidly sealed to the inner surface of the dispensing chamber; a controller for controlling the operation of the injection device; a memory device resistant to sterilization techniques that would erase semiconductor memory, the memory device comprising a first resistor connected in series with a first fuse, a second resistor connected in series with a second fuse, and a voltage applied across the first and second fuse-resistor pairs, the memory device located in a disposable portion of the injection device, the memory device with preprogrammed dosage data; and a housing at least partially enclosing the dispensing chamber and the plunger; wherein the controller reads the dosage data from the memory device and operates the injection device to deliver a dosage corresponding to the dosage data.