| 摘要 |
<p>A fluid pressure supplying device which comprises a spool hole (1a), a switchover spool (2) adapted for reciprocation between first and second positions, first and second pressure receiving chambers (3, 4) for pushing the switchover spool to the first and second positions, respectively, a valve aperture (1b), a valve disc (20) adapted for reciprocation between first and second positions, a pressure chamber (20) for moving the valve disc to the first position, and a spring (22). The first pressure receiving chamber is made larger in pressure receiving area than the second pressure receiving chamber, and the second pressure receiving chamber is constantly supplied with a fluid pressure, so that when the spool is in the first position, the valve disc moves to the first position with the second pressure receiving chamber communicating with a pressure chamber, and when the spool is in the second position, the valve disc is moved to the second position by the spool.</p> |
