Spool valve device

摘要

A spool valve which can set the relative location between the spool and the sleeve adequately and easily and which can ensure the smooth flow of the fluid includes a sleeve and a spool. The sleeve has a first communicating hole which is opened into the cylinder bore and a second communicating hole which is opened into the cylinder bore and which is separated from the first communicating hole with a predetermined distance in the axial direction of the cylinder bore. The spool is fluidtightly accommodated in the cylinder bore to slide and has one end portion which opens and closes the first communicating hole in response to the sliding operation thereof and the other end portion which opens and closes the second communicating hole is response to the sliding operation thereof. The step portions have end surface which are approximately at a right angle to the axis of the spool from an outer circumference and inclined surface which decrease progressively a diameter of the spool from the end surface toward the outside of the spool are formed on at least one of the one end portion and the other end portion of the spool.