APPARATUS TO BIAS SPOOL VALVES USING SUPPLY PRESSURE

摘要

Apparatus to bias spool valves using supply pressure are disclosed. An example apparatus includes a housing (106) of a spool valve, the housing including a first port (118) to receive a fluid at a supply pressure. The example apparatus further includes a spool (102) within the housing. A position of the spool is to be selectively controlled via an input force acting on the spool, the position of the spool to define a path of a flow of the fluid through the spool valve from the first port to a second port of the housing. A biasing force is to bias the spool opposite the input force, the biasing force to be generated from the supply pressure applied to an end of the spool.