Door opening locking device for house, has case with motor starter having receiver activating piston that actuates steel bar that is controlled by ultrasound transmitter case, where starter pushes piston with steel bar

摘要

The device has a case (1) with a motor starter having a receiver (2) that activates a piston (3) that actuates a steel bar (4) that is controlled by an ultrasound transmitter case. The starter pushes the piston with the steel bar. The steel bar slides on an inner facade of a door. The motor starter, receiver, steel bar, piston and transmitter case are electrically supplied by batteries in case of failure.