A lock bolt extendible and retractable by movement of a power transmission assembly driven by an actuator and having a cam thereon which cams against the lock bolt to retract the lock bolt and unlock the steering column. In some embodiments, the cam has a curved surface with varying distance from the...http://www.google.com/patents/US7140213?utm_source=gb-gplus-sharePatent US7140213 - Steering column lock apparatus and method
