PRESSURE LIMITATION VALVE Russian patent published in 2019 - IPC B60T11/34 B60T15/50 

FIELD: machine building.

SUBSTANCE: invention relates to the field of transport machine building. Pressure limiting valve comprises valve body with piston and pressure limiting pressure spring. Valve piston can occupy open position, in which valve inlet and valve outlet are connected to each other, and closed position, in which valve inlet and valve outlet are separated from each other. First valve piston ring has a pneumatic working surface with smaller dimensions than the second piston ring of the valve. Valve piston has, between the first piston ring and the second piston ring, a substantially conical portion, tapering towards to first piston ring. In closed position sealing surface of first piston ring is tightened to body ledge with by means of pneumatic force sealing, acting on first piston ring and second piston ring and directed towards force adjusting spring for pressure limitation. Valve piston has pneumatic transition for performance of safety valve with possibility of its operation locking loaded with spring force safety valve body.

EFFECT: reduced design space, reduced material consumption for valve unit and fewer parts for mounting.

13 cl, 3 dwg