利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

95 条记录 (耗时 0.023 秒)

    Valve apparatus
    51.
    发明授权
    Valve apparatus 失效
    阀门装置

    公开(公告)号：US5140815A

    公开(公告)日：1992-08-25

    申请号：US427126

    申请日：1989-10-23

    申请人： Genroku Sugiyama ,  Toichi Hirata ,  Hideaki Tanaka ,  Kazumasa Yuasa ,  Yusaku Nozawa

    发明人： Genroku Sugiyama ,  Toichi Hirata ,  Hideaki Tanaka ,  Kazumasa Yuasa ,  Yusaku Nozawa

    IPC分类号： F15B13/04 ,  F16K15/18

    CPC分类号： F15B13/0405 ,  F16K15/18

    摘要： A hydraulic actuator is driven by hydraulic fluid discharged from a hydraulic pump, for controlling driving of the actuator. A valve has a meter-in circuit for introducing the hydraulic fluid discharged from the hydraulic pump into the actuator. The valve also has a meter-out circuit for returning fluid from the actuator, into a tank. The meter-out circuit is provided with a main valve for controlling the return fluid from the actuator, and a pilot circuit including a variable restrictor. When the main valve is closed, the pilot circuit is closed, and when the main valve is open, its degree of opening varies depending upon an amount of restriction of the variable restrictor. A controller varies the amount of restriction of the variable restrictor valve in accordance with the driving pressure of the actuator.

    摘要翻译： PCT No.PCT / JP89 / 00184 Sec。 371日期：1989年10月23日 102（e）日期1989年10月23日PCT提交1989年2月23日PCT公布。 第WO89 / 08213号公报。 日期1989年9月8日。液压致动器由从液压泵排出的液压流体驱动，用于控制致动器的驱动。 阀具有用于将从液压泵排出的液压流体引入致动器的计量回路。 阀还具有用于将流体从致动器返回到罐中的出口回路。 出口电路设置有用于控制来自致动器的返回流体的主阀和包括可变节流器的先导电路。 当主阀关闭时，先导电路关闭，当主阀打开时，其开度根据可变节流器的限制量而变化。 控制器根据致动器的驱动压力改变可变节流阀的限制量。

    Hydraulic driving apparatus
    52.
    发明授权
    Hydraulic driving apparatus 失效
    液压驱动装置

    公开(公告)号：US5083430A

    公开(公告)日：1992-01-28

    申请号：US439389

    申请日：1989-11-13

    申请人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusaku Nozawa

    发明人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusaku Nozawa

    IPC分类号： E02F9/22 ,  F15B11/16 ,  F15B13/04

    CPC分类号： F15B11/165 ,  E02F9/2225 ,  E02F9/2232 ,  E02F9/2296 ,  F15B11/163 ,  F15B13/0417 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/30505 ,  F15B2211/30535 ,  F15B2211/3055 ,  F15B2211/3111 ,  F15B2211/324 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/6051 ,  F15B2211/6054 ,  F15B2211/7053 ,  F15B2211/7135 ,  Y10T137/87193

    摘要： A hydraulic driving apparatus has at least one hydraulic pump, a plurality of hydraulic actuators driven by hydraulic fluid discharged from the hydraulic pump, a tank to which return fluid from the plurality of hydraulic actuators is discharged, and a flow control valve associated with each of the plurality of hydraulic actuators. The flow control valve has a first main variable restrictor for controlling flow rate of the hydraulic fluid supplied from the hydraulic pump to the hydraulic actuator, and a second main variable restrictor for controlling flow rate of the return fluid discharged from the hydraulic actuator to the tank. A pump control operative in response to the difference between the discharge pressure of the hydraulic pump and the maximum load pressure of the hydraulic actuators normally controls the discharge rate of the hydraulic pump so that the pump discharge pressure is raised more than the maximum load pressure by a predetermined value. A first pressure-compensating control operates with a valve determined by the difference between the pump discharge pressure and the maximum load pressure, the value acting as a compensating differential-pressure target value, and pressure-compensation-controls the first main variable restrictor of the flow control valve. A second pressure-compensating control is operative with a value determined by the pressure difference across the first main variable restrictor, the valve acting as a compensating differential-pressure target value, for controlling the second main variable restrictor of the flow control valve.

    Flow control valves for hydraulic motor system
    53.
    发明授权
    Flow control valves for hydraulic motor system 失效

    公开(公告)号：US4945723A

    公开(公告)日：1990-08-07

    申请号：US213179

    申请日：1988-06-29

    申请人： Eiki Izumi ,  Toichi Hirata ,  Yusaku Nozawa ,  Masahiko Shimotori

    发明人： Eiki Izumi ,  Toichi Hirata ,  Yusaku Nozawa ,  Masahiko Shimotori

    IPC分类号： E02F9/22 ,  F15B11/16 ,  F15B11/20 ,  F15B13/04 ,  F15B13/06

    CPC分类号： F15B13/0405 ,  E02F9/2225 ,  E02F9/2232 ,  Y10T137/87193

    摘要： A hydraulic drive system has first and second flow control valves. Each of the control valves has a main valve of the seat valve type with a valve body for controlling communication between an inlet port and an outlet port which are both connected to a main circuit. Each further have a variable restrictor capable of changing an opening degree thereof in response to displacements of the valve body, and a back pressure chamber communcating with the inlet port through the variable restrictor and producing a control pressure to urge the valve body in the valve-closing direction. A pilot valve is connected to a pilot circuit which is connected between the back pressure chamber and the outlet port of the main valve; and an auxiliary valve is connected to the pilot circuit for controlling a differential pressure between the inlet pressure and the outlet pressure of the pilot valve. The auxiliary valve is controlled such that the differential pressure between the inlet pressure and the outlet pressure of the pilot valve has a relationship expressed by a certain equation including constants .alpha., .beta. and .gamma., with respect to a differential pressure between the delivery pressure of a hydraulic pump and the maximum load pressure of the first and second hydraulic actuators, a differential pressure between that maximum load pressure and the self-load pressure of each of the hydraulic actuators, and the self-load pressure, wherein the constants .alpha., .beta. and .gamma. are set to respective predetermined values.

    Hydraulic drive unit
    56.
    发明申请
    Hydraulic drive unit 有权
    液压驱动单元

    公开(公告)号：US20050144938A1

    公开(公告)日：2005-07-07

    申请号：US10520144

    申请日：2003-07-09

    申请人： Yusuke Kajita ,  Kazunori Nakamura ,  Toichi Hirata

    发明人： Yusuke Kajita ,  Kazunori Nakamura ,  Toichi Hirata

    IPC分类号： E02F9/22 ,  F15B11/024 ,  F15B11/028 ,  F15B11/06 ,  F15B21/14 ,  F16D31/02

    CPC分类号： F15B11/06 ,  E02F9/2228 ,  E02F9/226 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/024 ,  F15B11/028 ,  F15B21/14 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30525 ,  F15B2211/3058 ,  F15B2211/3116 ,  F15B2211/31576 ,  F15B2211/329 ,  F15B2211/40507 ,  F15B2211/40515 ,  F15B2211/41545 ,  F15B2211/428 ,  F15B2211/6355 ,  F15B2211/7114 ,  F15B2211/88

    摘要： To permit releasing an excessive rod pressure from a first hydraulic cylinder and also effectively using pressure oil of its rod chamber upon performing such an operation that pressure oil is fed to a bottom chamber of a second hydraulic cylinder, a hydraulic drive unit is provided with a boom cylinder, an arm cylinder, a communication line communicating a rod chamber of the boom cylinder and a bottom chamber of the arm cylinder with each other, and a switching valve arranged on the communication line for communicating or shutting off the communication line in accordance with a rod pressure of the boom cylinder. When an arm-crowding single operation is performed and by its digging counterforce, a rod pressure of the boom cylinder rises to a high pressure of at least a predetermined pressure, the switching valve is changed over from a shut-off position to a communicating position to feed pressure oil from the rod chamber of the boom cylinder to the bottom chamber of the arm cylinder. The boom cylinder is hence caused to automatically extend, thereby avoiding lifting of a body of a hydraulic excavator.

    摘要翻译： 为了允许从第一液压缸释放过大的杆压力，并且在执行将压力油供给到第二液压缸的底部室的操作时，还可以有效地使用其杆室的压力油，液压驱动单元设置有 动臂缸，斗杆缸，将动臂缸的杆室与斗杆缸的底部室连通的连通管线，以及设置在通信线路上的切换阀，用于根据通信线路进行通信或切断通信线路 动臂缸的杆压力。 当执行搂紧单次操作并且通过其挖掘反作用力时，动臂缸的杆压力升至至少预定压力的高压，切换阀从关闭位置切换到连通位置 将压力油从动臂缸的杆室输送到臂缸的底部腔室。 因此，动臂缸被自动延伸，从而避免了液压挖掘机的主体的提升。

    System for changing function of work machine and base station
    58.
    发明授权
    System for changing function of work machine and base station 有权
    改变作业机和基站功能的系统

    公开(公告)号：US06898502B2

    公开(公告)日：2005-05-24

    申请号：US10240398

    申请日：2001-03-30

    申请人： Hiroshi Watanabe ,  Koichi Shibata ,  Hiroyuki Adachi ,  Toichi Hirata ,  Genroku Sugiyama ,  Hideki Komatsu

    发明人： Hiroshi Watanabe ,  Koichi Shibata ,  Hiroyuki Adachi ,  Toichi Hirata ,  Genroku Sugiyama ,  Hideki Komatsu

    IPC分类号： E02F3/43 ,  E02F9/20 ,  E02F9/26 ,  H04L12/28 ,  G06F19/00 ,  G07C5/00

    CPC分类号： E02F9/26 ,  E02F3/435 ,  G05B2219/23297 ,  G05B2219/2637

    摘要： A function changing system of construction machinery includes a hydraulic excavator and a base station. The hydraulic excavator is deployed at a construction site and is provided with a rewritable memory storing control programs and/or data required for control of the machinery, a CPU for reading out the control programs from the memory and executing them, and a communications device The base station is provided with a communications device, a center server for identifying the serial number of the hydraulic excavator and transferring information with the control unit, and a database managed by the center server and storing control programs corresponding to the hydraulic excavator. When changing or switching an attachment of the hydraulic excavator, information is transferred with the center server of the base station and the control programs or data stored in the storage unit are rewritten to enable work suited to the changed part.

    摘要翻译： 工程机械功能改变系统包括液压挖掘机和基站。 液压挖掘机部署在施工现场，并且设置有可重写存储器，其存储用于控制机器所需的控制程序和/或数据; CPU，用于从存储器读出控制程序并执行它们;以及通信设备 基站设置有通信设备，用于识别液压挖掘机的序列号并与控制单元传送信息的中央服务器，以及由中央服务器管理的数据库，并存储与液压挖掘机相对应的控制程序。 当更换或切换液压挖掘机的附件时，信息与基站的中央服务器一起传送，并且存储在存储单元中的控制程序或数据被重写以使得适合于改变的部分的工作。

    Cab for construction machinery
    60.
    发明授权
    Cab for construction machinery 有权
    工程机械驾驶室

    公开(公告)号：US06450284B1

    公开(公告)日：2002-09-17

    申请号：US09719417

    申请日：2000-12-12

    申请人： Tsuyoshi Sakyo ,  Toichi Hirata ,  Takashi Nakagawa ,  Akitaka Takeuchi ,  Kazuhiko Hiraoka

    发明人： Tsuyoshi Sakyo ,  Toichi Hirata ,  Takashi Nakagawa ,  Akitaka Takeuchi ,  Kazuhiko Hiraoka

    IPC分类号： B60K2600

    CPC分类号： E02F9/2004 ,  E02F9/16 ,  E02F9/26

    摘要： A cab for a construction machine includes an operator's seat within a cab box. Consoles are provided on the left and right sides of the operator's seat, respectively, and a switch box is provided on an outer side of an operating lever of the right console. Provided on the switch box are a control dial for variably controlling rotational speed of an engine, a working mode selector switch, and a vehicle drive mode selector switch. An operator who is seated on the operator's seat can manipulate the switches on the switch box by stretching a right arm toward the operating lever and by blind touch.

    摘要翻译： 一种用于建筑机械的驾驶室包括驾驶室内的驾驶员座椅。 控制台分别设置在操作员座椅的左侧和右侧，并且在右控制台的操作杆的外侧上设置开关盒。 在开关盒上设置有用于可变地控制发动机的转速的控制转盘，工作模式选择器开关和车辆驱动模式选择器开关。 坐在操作员座椅上的操作者可以通过向操作杆伸展右臂并通过盲目的操纵来操纵开关盒上的开关。