Patent ID: 8899081

Claim:
An electromechanical lock, comprising: a cylinder having a keyway; an electric generator configured to generate electric power from mechanical power; an electronic circuit, powered by the electric power, configured to read data from an external source, and match the data against a predetermined criterion; a power transmission mechanism configured to convey the mechanical power to the electric generator; a locking pin engaging the cylinder to prevent rotation of the cylinder; a clutch having a closed position to supply power from the power transmission mechanism to the electric generator and an open position to disengage the power transmission mechanism from the electric generator; and the electric generator is further configured, when the clutch is in the open position, to be powered by the electric power, to receive electronic control from the electronic circuit provided that the data matches the predetermined criterion, and to set the lock mechanically from a locked state wherein the cylinder is prevented from rotation to a mechanically openable state wherein the cylinder can rotate.