DEVICE FOR ACTUATION OF FLUID MEDIUM AND VALVE UNIT Russian patent published in 2011 - IPC F16K31/02 F04B53/10 

FIELD: machine building.

SUBSTANCE: device for operation with fluid medium consists of high pressure pipeline, of working chamber and of valve unit. The valve unit is located between the high pressure pipeline and working chamber to control flow of fluid medium from the high pressure pipeline to the working chamber. The valve unit consists of a main valve and auxiliary valve. An element of the main valve tightly contacts a valve seat. The auxiliary valve consists of an element of the valve transferred with an electro-magnet for equalising pressure on either side of the main valve by communication of the working chamber with the high pressure pipeline. Also, there is the valve unit for control of fluid medium flow.

EFFECT: valve, arranged on surface between working chamber and high pressure pipeline of device operating with fluid medium; valve opens when fluid medium is pressed and output shaft of device is immobile.

16 cl, 5 dwg