Oil passage switching valve having oil filter

摘要

Oil ports formed on a cylindrical sleeve of an oil passage switching valve are covered with respective filters. The filter is formed in a ring shape by rounding a resilient metal strip having plural filter holes formed thereon. The filter clings around the outer periphery of the cylindrical sleeve by its own resiliency. A contacting portion is formed on one of overlapping ends of the filter ring or on both overlapping ends so that the contacting portion engages with the other overlapping end to prevent the filter ring from being enlarged by an oil pressure applied to the filter from its inside. Foreign particles in the oil are surely prevented from entering into the sleeve by the filter covering the oil port in close contact therewith.