Dosage control device
First Claim
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.
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Accused Products
Abstract
An injection device includes a dispensing chamber, a plunger, a controller, a memory device resistant to sterilization, and a housing at least partially enclosing the dispensing chamber and the plunger. The dispensing chamber has an inner surface and an outer surface. The inner surface defines a cavity for receiving a quantity of a substance. The plunger is engaged with the inner surface of the dispensing chamber, is capable of sliding in the cavity of the dispensing chamber, and is fluidly sealed to the inner surface of the dispensing chamber. The controller controls the operation of the injection device. The controller reads dosage data from the memory device and operates the injection device to deliver a dosage corresponding to the dosage data.
43 Citations
19 Claims
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1. An injection device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An ophthalmic injection system comprising:
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a tip segment and a limited reuse assembly; the tip segment 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, the plunger having a proximate end and a distal end;
the proximate end having a first mechanical linkage interface;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 with preprogrammed dosage data; and a first housing at least partially enclosing the dispensing chamber and the plunger; the limited reuse assembly comprising; a power source; a controller for controlling the operation of the system; a actuator having a shaft; a second mechanical linkage interface located on an end of the shaft; and a second housing at least partially enclosing the controller and the actuator; 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. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification