Patent ID: 7327232

Claim:
A system of devices for emergency opening of vehicle doors, especially to open from inside the door(s) blocked or jammed following a traffic accident, including means for vehicle door displacement to opened position, with simultaneous unlocking of vehicle-door locking unit, wherein a door opening executing element of said system is a pneumatic servomotor ( 1 ) supplied with pressure from at least two pyrotechnical charges or cartridges ( 2 ) and ( 3 ), whereas an electrical signal for blowing up the first pyrotechnical cartridge ( 2 ), is given by an electric circuit of sensors ( 4 ), consisting of consecutively activated: crush sensor ( 5 ), shock or acceleration sensor ( 6 ), and tilt sensor ( 7 ), sending a signal to electronic cartridge-blowing unit ( 8 ) controlling the process of blowing up a pyrotechnical charge or cartridge ( 2 ), whereas the necessity to blow up a subsequent pyrotechnical cartridge ( 3 ) and any further cartridges is controlled by a sensor ( 9 ) of pressure inside the pneumatic servomotor ( 1 ), whereas a blowup time interval is govemed by an electronic cartridge-blowing unit ( 8 ), whereas the retraction of the rod of the pneumatic-servomotor ( 1 ) to its original position is executed by an electrovalve ( 10 ), which receives the electric signal from either a pressure sensor ( 9 ) or a displacement sensor, temperature sensor or time relay, depending on the sequence of events causing the respective signalization by these control sensors additionally mounted in the vehicle.