US Patent 11819473 Access counting lid for a prescription pill bottle

A lid counts a number of patient accesses to a pill bottle. The lid has an actuator, a main housing containing the actuator and an access counter responsive to the actuator. The actuator stores energy in response to axial force manually applied to mount the lid on the bottle and releases the stored energy in response to counter-axial force manually applied to remove the lid from the bottle. Each release of energy causes the access counter to advance one interval, indicating an accumulated total of advances and, therefore, the total number of times the bottle has been accessed. The lid can be adjusted to account for taking various numbers of pills per dosage over a predetermined time period.