Importance

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Abstract

The invention provides a control valve wherein a restrictor can be formed simply in an oil passage for introducing pressure oil on the downstream side of an orifice into a pressure chamber. The control valve is generally constructed such that pressure oil on the downstream side of the orifice is introduced into the pressure chamber through the oil path and a spool is moved by an action of a pressure difference on the opposite sides of the orifice whereas an excessive flow mount of oil escapes to a tank port. A groove is formed along an insertion hole of a connector or on a tubular portion of an orifice member which overlaps with the insertion hole. Such groove may otherwise be formed both along the insertion hole and on the tubular portion. When the orifice member is inserted into a connector, a restrictor which makes part of the oil path is formed from the groove simultaneously.

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First Claim