Patent ID: 11944794
Assignee: AMGEN INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 17:
18. An on-body injector comprising:
a reservoir filled or configured to be filled with a drug;
a plunger moveable relative to the reservoir;
a cannula having an operational state wherein the cannula is connected in fluid communication with the reservoir;
a drive operably coupled to the plunger to move the plunger to move the drug out of the reservoir and through the cannula;
a housing, wherein the reservoir, the cannula, and the drive each is disposed at least partially within the housing;
a proximity sensor having a first sensor state when the proximity sensor is not in contact with skin of a patient and a second sensor state when the proximity sensor is in contact with the skin of the patient;
a lock operably coupled to the proximity sensor, the lock having a first position resisting movement of the plunger relative to the reservoir when the proximity sensor is in the first sensor state and the lock having a second position permitting movement of the plunger relative to the reservoir when the proximity sensor is in the second sensor state; and
wherein the lock mechanically resists movement of the plunger between first and second ends of the reservoir when the proximity sensor is in the first sensor state.