| 摘要 |
PURPOSE:To accomplish a two-system liquid pressure controlling function with a simple construction, by providing plungers on which a spring is compressedly provided between retaining clips in a center sleeve. CONSTITUTION:The center sleeve 13 is slidably provided in a casing 12, the plungers 29.30 are prevented from slipping off by the retaining clips 31.32 in a gas chamber 18, and the spring 17 is compressedly provided between the clips 31.32. Step parts 41.42 provided at head parts of the plungers 29.30 make contact with seal rings 37.38, whereby liquid pressures at outlet ports 5.6 are subjected to proportional pressure-reducing control. When one of the systems is failed, the center sleeve 13 is moved, and the seal rings 37.38 are separated from the casing 12 by the head parts of the plungers, so that a bypass passage is opened to stop the pressure-reducing control on the other system. Accordingly, the two-system liquid pressure controlling function can be accomplished with a simple construction. |
