PRESSURE TIGHT VENT Russian patent published in 2011 - IPC F16K1/22 F16K15/03 F24F13/10 

FIELD: machine building.

SUBSTANCE: invention is designed for implementation in ventilation system of premises, particularly, in shelters requiring higher safety in case of rapid growth of air medium pressure. The pressure tight vent consists of a cylinder case. A rotary dick is installed inside the case. The disk is hinged on a two-arm lever. A middle part of the lever is coupled with the disk by means of a pole rigidly fastened on the central part of the disk. At least one spring is installed between the lever and the disk. One end of the spring is fixed on the disk closer to its periphery part. Another end of the spring is fixed on the lever on the opposite side from the pole. The lever is rigidly arranged on a shaft. Geometrical axis of the shaft is set off from axis of the lever and the disk connection to a horizontal side so, that the shaft is positioned between axis of connection of the lever and the pole of the disk and a point of spring fixture to the lever in side view. The lever corresponds to an elongated element with a recess in the middle part, wherein there is installed the end of the pole and axle of lever connection with the pole.

EFFECT: increased pressure tightness of vent and reliability of its operation, also, simplification of design.

3 cl, 3 dwg