SAFETY DEVICE Russian patent published in 2018 - IPC G01M5/00 

FIELD: testing equipment.

SUBSTANCE: invention relates to a testing technique, in particular to means of protection against the destruction of airframe jets of aircraft when tested for strength by excess pressure. In the safety device, the pressure switch comprises a pressure element, a control valve and an intermediate valve. Seat of the control valve is integrated with the cover of the safety device, and the shutter – with a rigid center of the membrane, fixed between the lid and the body of the safety device. Seat of the intermediate valve is connected to the rigid center of the diaphragm, and the gate to the valve of the working air valve. Opening of working air valve is provided by moving the rigid center of the membrane.

EFFECT: increase in the accuracy of operation and the possibility of easy reconfiguration of its operation from one pressure level to the other.

8 cl, 1 dwg