| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate an action of biased pressing force with a sleeve arrived at the operation end, in a relief valve which switches the relief pressure by a change in the position of the sleeve. <P>SOLUTION: The relief valve is provided with a plurality of stoppers S which abut on the back surface 4B of the sleeve 4, when the sleeve 4 moves in the direction of a back pressure space B, to decide the moving limit of the sleeve 4. That is, a guide body 25 is provided coaxially with an axis core X so as to be fitted in the inner space of the sleeve 4, and a plurality of stoppers S are disposed at a position surrounding the axis core X on the outer periphery of the base end position of the guide body 25. <P>COPYRIGHT: (C)2012,JPO&INPIT |
