Patent ID: 8210403
Filing Date: 2012-07-03
Classification: A61J,A61M

Abstract:
1. A dispenser suitable for biomedical use, comprising: an actuator, wherein movement comprising completion of a dispensing stroke of the actuator dispenses a dose of a product; a lock; first retaining means for retaining the lock in an unlocked state prior to a dispensing stroke; second retaining means for retaining the lock in a locked state after a dispensing stroke has been completed; a lock actuator operable when energized to change the state of the lock; and a control circuit operable to energise the lock actuator; wherein the first and second retaining means are operable independently of the lock actuator so that the lock actuator is required to be energised only when changing the state of the lock; and wherein the lock comprises a locking member movable between a retracted position in the unlocked state and, in the locked state, an advanced position at which the locking member defines a limit of travel of the actuator, and wherein the device further comprises a self-locking mechanism comprising a resilient means biasing the locking member into the advanced position; and wherein the self-locking mechanism comprises a latch operable to hold the locking member in the retracted position in the unlocked state and a latch release mechanism operable to release the latch in response to movement of the actuator to a position beyond the limit of actuator travel defined by the locking member in the locked state.