Patent ID: 11865312
Assignee: SANOFI
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. The dose tracking mechanism of claim 1, wherein the electrical component is a variable resistor comprising:
a first component comprising:
a track spanning at least a portion of a length of the first component, and
first and second conductors along the track; and

a second component moveable with respect to the first component along the track, the second component contacting the first and second conductors to form an electrically closed path; and
wherein the electrically closed path has a resistance proportional to a position of the second component along the length of the first component,
wherein the electric circuit of the RFID device is connected to the variable resistor,
wherein the moveable component of the drug delivery device comprises the first component or the second component, and
wherein the position of the second component with respect to the first component is changed during a dose setting operation or a dose dispending operation of the drug delivery device.