公开(公告)号：US06810912B2

公开(公告)日：2004-11-02

申请号：US10446114

申请日：2003-05-28

申请人： Yuuji Ogura ,  Satoshi Hamamoto ,  Zenzou Hamada ,  Satoshi Okude

发明人： Yuuji Ogura ,  Satoshi Hamamoto ,  Zenzou Hamada ,  Satoshi Okude

IPC分类号： F15B1304

CPC分类号： F15B13/0402 ,  F16K27/041 ,  F16K27/048 ,  Y10T137/8671

摘要： A spool valve comprises a slidable spool, and through displacement of the spool a supply port of the valve is allowed to communicate with one of the load ports of the valve while the other load port is allowed to communicate with a corresponding one of return ports of the valve. The spool is provided with a portion, the outside diameter of which gradually increases, at least on the other load port side from the center of a central concave portion of the spool. The outside diameter gradually increasing portion decreases fluid force which acts against an operating force of the spool when the valve is activated.

摘要翻译： 滑阀包括可滑动的阀芯，并且通过阀芯的移动，允许阀的供应端口与阀的一个负载端口连通，而允许另一个负载端口与相应的一个返回端口 阀门。 阀芯设置有至少在从卷轴的中心凹部的中心的另一个装载口侧的外径逐渐增加的部分。 外径逐渐增加的部分减小了当阀被启动时抵抗阀芯的操作力的流体力。