公开(公告)号：US09702481B2

公开(公告)日：2017-07-11

申请号：US14524274

申请日：2014-10-27

Applicant: DunAn Microstaq, Inc.

Inventor： Harry A. Hunnicutt

IPC: F16K11/07 ,  F16K99/00 ,  F15B13/04 ,  F15B13/043 ,  F16K31/42

CPC classification number: F16K99/0059 ,  F15B13/0402 ,  F15B13/0433 ,  F16K11/07 ,  F16K31/426 ,  F16K99/0001 ,  F16K99/0011 ,  Y10T137/0396 ,  Y10T137/86582 ,  Y10T137/8663 ,  Y10T137/8671

Abstract: A pilot-operated spool valve includes a body defining a bore. A supply port and a load port are in fluid communication with the bore. A spool is disposed in the longitudinal bore, and the spool and the body cooperate to define a command chamber at a first end of the spool, which command chamber is adapted to receive fluid at a command pressure supplied to the body. The spool is movable in the bore to control fluid communication between the supply port and the load port. A pressure space is defined in at least one of the body and the spool between the command chamber and both of the supply port and the load port in all operative positions of the spool. The pressure space is supplied with pressurized fluid such that leakage from the command chamber is minimized or eliminated.

公开(公告)号：US20150090354A1

公开(公告)日：2015-04-02

申请号：US14524274

申请日：2014-10-27

Applicant: DunAn Microstaq, Inc.

Inventor： Harry A. Hunnicutt

IPC: F16K99/00

CPC classification number: F16K99/0059 ,  F15B13/0402 ,  F15B13/0433 ,  F16K11/07 ,  F16K31/426 ,  F16K99/0001 ,  F16K99/0011 ,  Y10T137/0396 ,  Y10T137/86582 ,  Y10T137/8663 ,  Y10T137/8671

Abstract: A pilot-operated spool valve includes a body defining a bore. A supply port and a load port are in fluid communication with the bore. A spool is disposed in the longitudinal bore, and the spool and the body cooperate to define a command chamber at a first end of the spool, which command chamber is adapted to receive fluid at a command pressure supplied to the body. The spool is movable in the bore to control fluid communication between the supply port and the load port. A pressure space is defined in at least one of the body and the spool between the command chamber and both of the supply port and the load port in all operative positions of the spool. The pressure space is supplied with pressurized fluid such that leakage from the command chamber is minimized or eliminated.

Abstract translation: 先导式滑阀包括限定孔的主体。 供应端口和负载端口与孔流体连通。 阀芯设置在纵向孔中，并且阀芯和阀体协作以在阀芯的第一端处限定指令室，该指令室适于以提供给阀体的指令压力接收流体。 阀芯可以在孔中移动以控制供应端口和负载端口之间的流体连通。 在阀芯的所有操作位置中，在指令室与供给口和负载端口两者之间的主体和阀芯中的至少一个中限定了压力空间。 压力空间被供应加压流体，使得从指令室泄漏最小化或消除。