公开(公告)号：USD520522S1

公开(公告)日：2006-05-09

申请号：US29216087

申请日：2004-10-29

申请人： Travis Bakker ,  Michael Terrance Landrum

设计人： Travis Bakker ,  Michael Terrance Landrum

公开(公告)号：US5676169A

公开(公告)日：1997-10-14

申请号：US590932

申请日：1996-01-24

申请人： Michael Terrance Landrum

发明人： Michael Terrance Landrum

IPC分类号： F15B13/01 ,  F15B13/04

CPC分类号： F15B13/01 ,  Y10T137/2554

摘要： The hydraulic counterbalance valve has a valve body with an inlet port, a cylinder port and a pilot port. The valve body has an interior chamber extending through the valve body which forms a check seat where the interior chamber narrows. The interior chamber is in communication with each port by a number of passages. A check valve is disposed in a first passageway between the interior chamber and the inlet port. A bypass passage exists to circumvent the check valve and provide communication between the interior chamber and the inlet port. A control spool is movably disposed in the interior chamber. The control spool has a pilot end, a sealing means, metered groove and a pilot check. The pilot check of the control spool forms a pilot check seal with the check seat of the interior chamber. A spool spring is disposed in the interior chamber and biases the control spool pilot check to seat against the pilot check seat of the interior chamber. The metered groove on the control spool act to permit metered flow from the chamber to the bypass passageway incident to hydraulic pressure at the pilot port sufficient to overcome the force of the spool spring.

摘要翻译： 液压平衡阀具有带有入口，气缸端口和先导端口的阀体。 阀体具有延伸穿过阀体的内部腔室，其形成内部腔室变窄的支座。 内部室通过多个通道与每个端口连通。 止回阀设置在内室和入口之间的第一通道中。 存在旁路通道以避开止回阀并且在内部室和入口之间提供连通。 控制阀芯可移动地设置在内室中。 控制阀芯具有先导端，密封装置，计量槽和导向件检查。 控制阀芯的先导检查与内部室的检查座形成先导检查密封。 滑阀弹簧设置在内部腔室中，并且将控制滑阀引导检查偏置到靠在内部腔室的导向检查座上。 控制卷轴上的计量槽用于允许从腔室到旁路通道的计量流量入口到先导口处的液压，足以克服滑阀弹簧的力。