FIELD: machine building.
SUBSTANCE: disclosed is a device to bias spool valves using supply pressure. In the method, a sample device includes housing of spool valve (106), wherein the housing contains first port (118) for receiving a fluid under supply pressure. Also the sample device contains spool (102) inside the housing. Further, a position of the spool is to be selectively controlled via an input force acting on the spool, wherein the position of the spool defines a path of a flow of the fluid through the spool valve from the first port to a second port of the housing. Biasing force is to bias the spool opposite the input force, wherein the biasing force is generated from the supply pressure applied to an end of the spool.
EFFECT: use of a constant biasing force in the spool valve allows the spool valves to function correctly and extend the range of expected supply pressures.
21 cl, 10 dwg
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