Dual piston pilot valve
    1.
    发明授权
    Dual piston pilot valve 有权
    双活塞先导阀

    公开(公告)号:US6062260A

    公开(公告)日:2000-05-16

    申请号:US415928

    申请日:1999-10-12

    摘要: A dual piston pilot valve includes a housing forming first and second cylinders. A first spool is moveable in the first cylinder for engaging the a piston to effect movement of the first piston and a second spool is moveable in the second cylinder for engaging a second piston to effect movement of the second piston. The valve further includes a single pressurized fluid supply port communicating with both the first and second cylinders, a first output port communicating with the first cylinder, a second output port communicating with the second cylinder, a single exhaust port communicating with both the first and second cylinders, and a diaphragm engaging the housing and both the first and second pistons. The diaphragm is positioned between both the first and second spools and both the first and second seal regions of the first and second pistons to effect a seal between the single exhaust port and the first and second spools. Movement of the first piston is controlled independently from the movement of the second piston, and vice versa.

    摘要翻译: 双活塞先导阀包括形成第一和第二气缸的壳体。 第一阀芯可在第一气缸中移动,用于接合活塞以实现第一活塞的运动,并且第二阀芯可在第二气缸中移动,用于接合第二活塞以实现第二活塞的运动。 所述阀还包括与所述第一和第二气缸两者连通的单个加压流体供应口,与所述第一气缸连通的第一输出端口,与所述第二气缸连通的第二输出端口,与所述第一和第二气缸两端连通的单个排气口 气缸,以及与壳体接合的隔膜以及第一和第二活塞两者。 隔膜位于第一和第二卷轴两者之间以及第一和第二活塞的第一和第二密封区域之间,以实现单个排气口与第一和第二卷轴之间的密封。 第一活塞的移动独立于第二活塞的移动而被控制,反之亦然。

    Serial transmission system for controlling a network of I/O devices
    2.
    发明授权
    Serial transmission system for controlling a network of I/O devices 失效
    用于控制I / O设备网络的串行传输系统

    公开(公告)号:US5721737A

    公开(公告)日:1998-02-24

    申请号:US437320

    申请日:1995-05-09

    IPC分类号: G06F13/42 H04L12/403 H04J3/02

    CPC分类号: G06F13/4286 H04L12/403

    摘要: A serial transmission system for controlling a network of input/output devices is provided. The serial transmission system includes: a three wire serial link; a master unit for controlling communication over the serial link; multiple input remote units for receiving information from the input devices; and multiple output remote units for controlling the output devices. The master unit includes a programmable optically isolated microcontroller adapted to initiate a synchronous data link control (SDLC) communications protocol with the remote units. In addition the master unit includes memory tables for storing input/output, error, diagnostic, status and node availability information. This information can be shared with a PC or host controller. In addition, the PC or host controller can include programs for directing the master unit and remote units to initialize, reset, scan, or maintain an idle condition.

    摘要翻译: 提供了一种用于控制输入/输出设备的网络的串行传输系统。 串行传输系统包括:三线串行链路; 用于控制串行链路上的通信的主单元; 多个输入远程单元,用于从输入设备接收信息; 以及用于控制输出设备的多个输出远程单元。 主单元包括可编程光隔离微控制器,其适于与远程单元发起同步数据链路控制(SDLC)通信协议。 此外,主单元还包括用于存储输入/输出,错误,诊断,状态和节点可用性信息的存储表。 该信息可以与PC或主机控制器共享。 此外,PC或主机控制器可以包括用于指导主单元和远程单元来初始化,重置,扫描或维持空闲状态的程序。

    Electro-pneumatic pressure control system for welding and like apparatus
    3.
    发明授权
    Electro-pneumatic pressure control system for welding and like apparatus 失效
    用于焊接和类似设备的电动气动压力控制系统

    公开(公告)号:US6003428A

    公开(公告)日:1999-12-21

    申请号:US121787

    申请日:1998-07-24

    摘要: An electro-pneumatic control system pneumatically connected to a pressure source and electrically connected to an electrical signal source includes a selector switch having an electrical input connected to the electrical signal source, and having a first electrical output and a second electrical output. The system further includes a body having a movable member positioned therein, wherein the body has a first port and a second port; a first regulator valve having a bidirectional port connected to the first port of the body, having an input port connected to the pressure source, having an exhaust port, and having an electrical actuator connected to the first electrical output of the selector switch; and a second regulator valve having a bidirectional port connected to the second port of the body, having an input port connected to the pressure source, having an exhaust port, and having an electrical actuator connected to the second electrical output of the selector switch.

    摘要翻译: 气动连接到压力源并电连接到电信号源的电动气动控制系统包括具有连接到电信号源的电输入并具有第一电输出和第二电输出的选择器开关。 该系统还包括具有定位在其中的可动构件的本体,其中主体具有第一端口和第二端口; 第一调节阀,其具有连接到主体的第一端口的双向端口,具有连接到压力源的输入端口,具有排气口,并且具有连接到选择器开关的第一电输出的电致动器; 以及第二调节阀,其具有连接到主体的第二端口的双向端口,具有连接到压力源的输入端口,具有排气口,并且具有连接到选择器开关的第二电输出端的电致动器。