System of opening and closing of doors with pneumatic lock. (Machine-translation by Google Translate, not legally binding)

摘要

"SYSTEM OF OPENING AND CLOSING OF DOORS WITH PNEUMATIC LOCK", characterized by being constituted by two pneumatic cylinders that act separately on the lock and on the door, whose cylinders are related to three pneumatic distributors through corresponding lines of pressure conduction and hoses, being commanded the system thanks to a valve of manual operation. (Machine-translation by Google Translate, not legally binding)