US Patent 9644398 Intelligent door lock system with a haptic device

An intelligent door lock system includes a position sensing device configured to be coupled to a drive shaft of a lock device. The position sensing device senses position of the drive shaft to assist in locking and unlocking a lock of a lock device. A circuit is coupled to an engine with a memory. A haptic device is coupled to the circuit. The haptic device provides a visual indication that the lock has reached a final position. A device converts energy into mechanical energy and is coupled to the drive shaft. The positioning sensing device, the circuit, the position sensing device and the device that converts energy operate to rotate the drive shaft to lock and unlock the lock device.