Patent ID: 7905248

Claim:
A control valve comprising: a valve sleeve with a strainer attachment body portion comprising: an arc-shaped first surface that constitutes a part of an outer peripheral surface of the body portion; second surfaces providing reference planes and respectively extending, in parallel with each other toward a port, from two opposing ends of the arc-shaped first surface to second surface front ends; third surfaces respectively extending from the second surface front ends to third surface front ends and inclined to the second surface front ends in directions away from each other; fourth surfaces respectively extending from the third surface front ends to fourth surface front ends and inclined to the third surface front ends in directions approaching each other; and fifth surfaces respectively extending from the fourth surface front ends and more inclined toward each other than the fourth surfaces; and a valve spool slidably mounted within the valve sleeve so as to be free to advance and retreat within the sleeve, and a strainer, attached to the strainer attachment portion, comprising: engagement portions located at distal ends of the strainer and respectively contacting the third surfaces formed on the strainer attachment portion; and contact portions respectively contacting the fifth surfaces; and wherein the contact of the strainer with the third and fifth surfaces seals the strainer to the strainer attachment body portion of the valve sleeve to prevent foreign matter from entering the control valve.