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

Claim 13:
14. 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;
a controller disposed at least partially within the housing and being in communication with the proximity sensor and the lock, the controller being configured to change the lock from the first position to the second position in response to a signal received from the proximity sensor in the second sensor state.