FIRE EXTINGUISHER PRESSURE INDICATOR Russian patent published in 2023 - IPC G01L19/08 G01L7/00 

FIELD: instrument engineering.

SUBSTANCE: invention relates to devices for indicating and measuring the pressure of gaseous or liquid media used in fire extinguishers. The device contains a housing (1) with a channel for supplying the measured medium, a transparent cover (2), a membrane (3), an o-ring (4), a dial (6), a pointer (7), an axis (8) and a board (11), having threaded sections, a return elastic element made in the form of a flat spring and consisting of two concentrically located outer ring (12) and an inner ring (13), connected by jumpers (14). In this case, the attachment points of each of at least two jumpers (14) connecting the concentrically located rings are spaced along the central corner.

EFFECT: increasing the amount of axial movement of the inner concentric ring relative to the outer one and reducing the complexity of manufacturing the return elastic element.

2 cl, 2 dwg