利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

36 条记录 (耗时 0.023 秒)

    Pressure control valve
    1.
    发明授权
    Pressure control valve 失效

    公开(公告)号：US4942900A

    公开(公告)日：1990-07-24

    申请号：US412491

    申请日：1989-09-26

    申请人： Yusaku Nozawa ,  Kazumasa Yuasa ,  Wataru Ootu ,  Kinya Takahashi

    发明人： Yusaku Nozawa ,  Kazumasa Yuasa ,  Wataru Ootu ,  Kinya Takahashi

    IPC分类号： F16K17/04 ,  F15B11/00 ,  F16K17/10 ,  F16K31/363 ,  F16K31/383

    CPC分类号： F16K31/3835 ,  F16K17/105 ,  F16K31/363 ,  Y10T137/7764 ,  Y10T137/7765 ,  Y10T137/7769

    摘要： A pressure control valve has a main valve element of seat type slidably accommodated in a valve case for controlling communication between inlet and outlet sections of the valve case by movement of the main valve element, a control chamber defined within the valve case and between the valve case and an end face of the main valve remote from the outlet section for biasing the main valve element in a valve closing direction, and a variable restriction variable in its opening in response to the movement of the main valve element for communication between the control chamber and the inlet section of the valve case. There are provided first and second pilot lines for communication between the control chamber and the outlet section of the valve case, first and second pilot valve elements arranged respectively in the first and second pilot lines, a first valve drive unit operative in response to the pressure of the inlet section of the valve case for opening the first pilot valve element when the pressure reaches a first predetermined value, and a second valve drive unit operative in response to differential pressure between the pressure of the inlet section of the valve case and signal pressure introduced to a signal port for opening the second pilot valve element when the differential pressure reaches a second predetermined value.

    Pump capacity control device and valve device
    2.
    发明授权
    Pump capacity control device and valve device 失效
    泵容量控制装置和阀装置

    公开(公告)号：US06422009B1

    公开(公告)日：2002-07-23

    申请号：US09744308

    申请日：2001-01-23

    申请人： Yusaku Nozawa ,  Mitsuhisa Tougasaki ,  Yoshizumi Nishimura ,  Kinya Takahashi

    发明人： Yusaku Nozawa ,  Mitsuhisa Tougasaki ,  Yoshizumi Nishimura ,  Kinya Takahashi

    IPC分类号： F15B1100

    CPC分类号： E02F9/2296 ,  E02F9/2232 ,  F04B49/002 ,  F15B11/165 ,  F15B11/17 ,  F15B2211/20546 ,  F15B2211/20584 ,  F15B2211/253 ,  F15B2211/30515 ,  F15B2211/40515 ,  F15B2211/41572 ,  F15B2211/50572 ,  F15B2211/513 ,  F15B2211/5158 ,  F15B2211/6054 ,  F15B2211/6355 ,  F15B2211/7052 ,  F15B2211/71 ,  F15B2211/88 ,  Y10T137/2705

    摘要： A fixed throttle 12 is provided in a delivery line 11a of a fixed pump 11 driven by an engine 9 for rotation together with a hydraulic pump 1, and a differential pressure detecting valve 31 is provided in association with the fixed throttle 12 to detect a differential pressure across the fixed throttle 12 and to output a pressure lower than the detected differential pressure by a predetermined value. The output of the differential pressure detecting valve 31 is introduced, as a signal pressure, to a pressure bearing section 5c of a load sensing valve 5, thereby setting a target differential pressure. With that arrangement, a pressure in link with an engine revolution speed can be directly employed as the set differential pressure of the load sensing valve, and the structure of the load sensing valve can be avoided from being complicated. Further, in the idling revolution range in which the work amount is relatively small, the displacement of the hydraulic pump can be reduced to improve fine operability and cut down fuel consumption.

    摘要翻译： 固定节流阀12设置在由液压泵1与发动机9一起驱动的固定泵11的输送管线11a中，并且与固定节流阀12相关联地设置有差压检测阀31，以检测差速器 并且将低于检测到的差压的压力输出预定值。 差压检测阀31的输出作为信号压力引入负载检测阀5的压力承受部5c，从而设定目标压差。 通过这种结构，可以直接使用与发动机转速相关的压力作为负载感测阀的设定差压，并且可以避免负载感测阀的结构复杂化。 此外，在工作量相对较小的怠速转速范围内，能够降低液压泵的排量，提高精细的操作性，并且降低燃料消耗。

    Control valve
    3.
    发明授权
    Control valve 失效
    控制阀

    公开(公告)号：US06408876B1

    公开(公告)日：2002-06-25

    申请号：US09601251

    申请日：2000-10-13

    申请人： Yoshizumi Nishimura ,  Yusaku Nozawa ,  Kinya Takahashi ,  Mitsuhisa Tougasaki

    发明人： Yoshizumi Nishimura ,  Yusaku Nozawa ,  Kinya Takahashi ,  Mitsuhisa Tougasaki

    IPC分类号： F16K1124

    CPC分类号： F15B11/165 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30525 ,  F15B2211/329 ,  F15B2211/6355 ,  F15B2211/67 ,  F16K11/07 ,  F16K27/041 ,  Y10T137/87193 ,  Y10T137/87201

    摘要： It is an object of the present invention to provide a control valve which can reduce the number of external lines connected to a hydraulic remote control valve. A control valve 1 for controlling hydraulic cylinders 2,2′ is provided, in one 26 of spool covers, with fluid passages 27,27′, a shuttle valve 28 for selecting higher one of pilot pressures to be transmitted to these fluid passages 27,27′, and a fluid passage 29 for transmitting the pressure selected by the shuttle valve 28. The fluid passages 27,27′ are in communication with pressure fluid ports 25,25′ as connection ports for pilot lines 24a,24c. The control valve 1 is also provided, in the other spool cover 32, with fluid passages 33,33′, a shuttle valve 34 for selecting higher one of pilot pressures to be transmitted to these fluid passages 33,33′, and a fluid passage 35 for transmitting the pressure selected by the shuttle valve 34. The fluid passages 33,33′ are in communication with pressure fluid ports 31,31′ as connection ports for pilot lines 24b,24d.

    摘要翻译： 本发明的目的是提供一种可以减少连接到液压遥控阀的外部线路的数量的控制阀。 用于控制液压缸2,2'的控制阀1设置在一个26个卷轴盖中，其中包括流体通道27,27'，用于选择要传递到这些流体通道27的先导压力中的较高一个的往复阀28， 27'和用于传递由梭阀28选择的压力的流体通道29.流体通道27,27'与用于引导管线24a，24c的连接端口的压力流体端口25,25'连通。 控制阀1还在另一个卷轴盖32中设置有流体通道33,33'，用于选择要传递到这些流体通道33,33'的先导压力中的较高一个的往复阀34和流体通道 35，用于传递由梭阀34选择的压力。流体通道33,33'与用于导向管线24b，24d的连接端口的压力流体端口31,31'连通。

    Unloading valve
    5.
    发明授权
    Unloading valve 失效
    卸载阀门

    公开(公告)号：US06681794B2

    公开(公告)日：2004-01-27

    申请号：US10031169

    申请日：2002-01-17

    申请人： Mitsuhisa Tougasaki ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Kinya Takahashi

    发明人： Mitsuhisa Tougasaki ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Kinya Takahashi

    IPC分类号： F16K1704

    CPC分类号： F04B49/03 ,  Y10T137/2579 ,  Y10T137/2605 ,  Y10T137/2642

    摘要： A spool 33 provided with a flange 39 is inserted in a spool bore 32, and a pressing force of a spring 52 is always applied through the flange 39 to the spool 33 at its one end in a second pressure chamber 35. A fluid groove 60 is formed in an inner peripheral surface of the spool bore 32 at a position near an abutment surface 51. A hydraulic fluid under the same pressure P2 as that in the second pressure chamber 35 is introduced to the fluid groove 60 through a fluid passage 61 formed in a valve body 31. When the flange 39 and the abutment surface 51 are in contact with each other, the hydraulic fluid is allowed to enter the interface between them through the fluid groove 60. A rise of the cracking pressure, which occurs upon the flange coming into tightly close contact with the abutment surface, can be prevented without reducing the strength of the flange 39, and stable opening/closing characteristics of the spool 33 can be achieved.

    摘要翻译： 设置有凸缘39的卷轴33插入卷轴孔32中，并且弹簧52的按压力总是通过凸缘39施加到卷轴33的一端处于第二压力室35中。流体槽60 在靠近抵接表面51的位置处形成在滑阀孔32的内周表面中。在与第二压力室35相同的压力P2下的液压流体通过形成的流体通道61被引入到流体槽60中 在阀体31中。当凸缘39和抵接表面51彼此接触时，允许液压流体通过流体槽60进入它们之间的界面。裂化压力的上升发生在 可以防止法兰与邻接表面紧密接触，而不会降低凸缘39的强度，并且可以实现稳定的卷轴33的打开/关闭特性。

    Directional control valve with flow distribution valves
    6.
    发明授权
    Directional control valve with flow distribution valves 失效
    带分流阀的定向控制阀

    公开(公告)号：US5957159A

    公开(公告)日：1999-09-28

    申请号：US142870

    申请日：1998-09-17

    申请人： Kinya Takahashi ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Nobuhiko Ichiki ,  Minoru Aoki

    发明人： Kinya Takahashi ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Nobuhiko Ichiki ,  Minoru Aoki

    IPC分类号： E02F9/22 ,  F15B11/05 ,  F15B13/08

    CPC分类号： E02F9/2267 ,  E02F9/2225 ,  E02F9/2271 ,  E02F9/2296 ,  F15B11/05 ,  F15B2211/20553 ,  F15B2211/3053 ,  F15B2211/30555 ,  F15B2211/3144 ,  F15B2211/329 ,  F15B2211/35 ,  F15B2211/71 ,  F15B2211/78 ,  Y10T137/87169 ,  Y10T137/87185

    摘要： A pair of directional control valves 8 and a pair of hold check valves 9 are disposed respectively between a pair of metering notches 6, which are formed in a land 4-1 of a spool 2 and have functions of both flow rate control and direction control, and a pair of actuator ports A, B. Each hold check valve comprises a valve body 90 in the form of a hollow spool having a seat portion 12 formed on an outer periphery and being subject to a pressure developed in an outlet passage 10 communicating with one of the actuator ports to act in the valve-closing direction. Each flow distribution valve comprises a valve body 80 being slidably fitted in the valve body 90 and having a front surface positioned to face an inlet passage 7 communicating with the metering notch and a rear surface positioned to face an control pressure chamber 30 communicating with a signal detecting hydraulic line. The valve body 90 has a shape to maintain a balance between forces produced by a pressure in the control pressure chamber and acting upon the valve body. A slit 21 having a variable dead zone X2 is formed between the valve body 80 and the valve body 90 for detecting and introducing a pressure between an outlet portion of the flow distribution valve and an inlet portion of the hold check valve to the control pressure chamber. The casing structure and device construction of a directional control valve with postpositional type flow distribution valves are thereby simplified.

    摘要翻译： PCT No.PCT / JP98 / 00197 Sec。 371日期：1998年9月17日 102（e）1998年9月17日PCT PCT 1998年1月20日PCT公布。 第WO98 / 31940号公报 日期1998年7月23日一对方向控制阀8和一对保持止回阀9分别设置在一对计量凹口6之间，这些计量凹口6形成在阀芯2的平台4-1中并且具有两个流动 速度控制和方向控制以及一对致动器端口A，B。每个保持止回阀包括中空阀芯形式的阀体90，该阀体具有形成在外周上的阀座部分12， 与致动器端口中的一个连通的出口通道10以沿阀关闭方向作用。 每个流量分配阀包括可滑动地装配在阀体90中的阀体80，其具有面向与计量凹口连通的入口通道7的前表面以及与信号通信的控制压力室30相对的后表面 检测液压管路。 阀体90具有保持由控制压力室中的压力产生的作用在阀体上的力之间的平衡的形状。 具有可变死区X2的狭缝21形成在阀体80和阀体90之间，用于检测和分配在分流阀的出口部分和保持止回阀的入口部分之间的压力到控制压力室 。 因此简化了具有后置式流量分配阀的方向控制阀的壳体结构和装置结构。

    Pressure compensating valves
    8.
    发明授权
    Pressure compensating valves 失效
    压力补偿阀

    公开(公告)号：US6135149A

    公开(公告)日：2000-10-24

    申请号：US367232

    申请日：1999-08-11

    申请人： Yusaku Nozawa ,  Yoshizumi Nishimura ,  Nobuhiko Ichiki ,  Minoru Aoki ,  Kinya Takahashi

    发明人： Yusaku Nozawa ,  Yoshizumi Nishimura ,  Nobuhiko Ichiki ,  Minoru Aoki ,  Kinya Takahashi

    IPC分类号： F15B11/00 ,  F15B11/05 ,  F15B13/04 ,  F15B13/08

    CPC分类号： F15B11/05 ,  F15B13/0417 ,  F15B2211/20553 ,  F15B2211/30505 ,  F15B2211/30535 ,  F15B2211/355 ,  Y10T137/87169 ,  Y10T137/87185

    摘要： Pressure compensating valves disposed at inlet sides of directional control valves are each configured with a step-shaped spool having a larger diameter portion and smaller diameter portions and pressure receiving chambers are provided to sandwich the larger diameter portion such that a pump delivery pressure and an inlet pressure of a metering throttle of the directional control valve acts in the chambers, respectively, and further pressure receiving chambers are provided at respective ends of the smaller diameter portions such that an outlet pressure of the metering throttle and a signal pressure act in the chambers, respectively. A check valve operated by the outlet pressure of the metering throttle is fitted in the smaller diameter end portion positioned on the side of the pressure receiving chamber to reduce the pump delivery pressure and produce a signal pressure. A sleeve having opposed ends positioned in a pressure receiving chamber in which the outlet pressure of the metering throttle is introduced and in the pressure receiving chamber is fitted on the smaller diameter portion, and the outlet pressure of the metering throttle is introduced to the pressure receiving chamber by movement of the sleeve.

    摘要翻译： PCT No.PCT / JP99 / 00051 Sec。 371日期1999年8月11日 102（e）1999年8月11日PCT PCT 1999年1月11日PCT公布。 出版物WO99 /​​ 35408 日期1999年7月15日设置在方向控制阀的入口侧的压力补偿阀各自配置有具有较大直径部分和较小直径部分的阶梯形卷轴，并且设置压力接收室以夹持较大直径部分，使得泵 方向控制阀的计量节气门的输送压力和入口压力分别作用在室中，并且另外的压力接收室设置在较小直径部分的相应端部处，使得计量节流阀的出口压力和信号压力 分别在室内行事。 通过计量节流阀的出口压力操作的止回阀装配在位于压力接收室一侧的较小直径端部分中，以减小泵输送压力并产生信号压力。 具有相对端的套筒，其位于压力接收室中，其中计量节流阀的出口压力被引入并且在压力接收室中安装在较小直径部分上，并且计量节流阀的出口压力被引入压力接收 通过袖子的移动。

    Hydraulic drive system
    9.
    发明授权
    Hydraulic drive system 失效
    液压驱动系统

    公开(公告)号：US5485724A

    公开(公告)日：1996-01-23

    申请号：US162142

    申请日：1993-12-14

    申请人： Yusaku Nozawa ,  Wataru Ohtsu ,  Nobuhiko Ichiki ,  Kazuyuki Ino ,  Hiroshi Matsuzaki ,  Kinya Takahashi

    发明人： Yusaku Nozawa ,  Wataru Ohtsu ,  Nobuhiko Ichiki ,  Kazuyuki Ino ,  Hiroshi Matsuzaki ,  Kinya Takahashi

    IPC分类号： E02F9/22 ,  F15B11/00 ,  F15B11/05 ,  F15B11/17 ,  F15B13/04 ,  F16D31/02

    CPC分类号： E02F9/2296 ,  E02F9/2232 ,  E02F9/2239 ,  E02F9/2292 ,  F15B11/17 ,  F15B13/0417 ,  F15B2211/20553 ,  F15B2211/30595 ,  F15B2211/40515 ,  F15B2211/40569 ,  F15B2211/50536 ,  F15B2211/5157 ,  F15B2211/6052 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/7142

    摘要： A hydraulic drive system comprises a check valve cb1 for detecting a pressure on the outlet side of a pressure compensating device VB1, a maximum load pressure detecting line SL1 for selecting higher one of the pressure detected by the check valve cb1 and a load pressure of an actuator associated with a hydraulic pump P1 and supplying it as a signal pressure, a check valve cb2 for detecting a pressure on the outlet side of a pressure compensating device VB2, a maximum load pressure detecting line SL2 for selecting higher one of the pressure detected by the check valve cb2 and a load pressure of an actuator associated with a hydraulic pump P2 and supplying it as a signal pressure independently of the maximum load pressure detecting line SL1, and a passage 300 for joining hydraulic fluids supplied from the hydraulic pumps P1, P2 and passing through variable restrictors RB1, RB2 with each other and supplying it to an actuator B. Mutual independence between the two hydraulic pumps P1, P2 can be thereby ensured.

    摘要翻译： PCT No.PCT / JP93 / 00677 Sec。 371日期1993年12月14日第 102（e）日期1993年12月14日PCT提交1993年5月21日PCT公布。 公开号WO93 / 24757 日期：1993年12月9日。液压驱动系统包括用于检测压力补偿装置VB1的出口侧的压力的止回阀cb1，用于选择由止回阀检测到的压力中的较高压力的最大负载压力检测线SL1 cb1和与液压泵P1相关联并将其作为信号压力供应的致动器的负载压力，用于检测压力补偿装置VB2的出口侧的压力的止回阀cb2，用于选择的最大负载压力检测线SL2 由止回阀cb2检测到的压力中的一个和与液压泵P2相关联的致动器的负载压力，并将其作为独立于最大负载压力检测线SL1的信号压力提供，以及用于连接供应的液压流体的通道300 从液压泵P1，P2中通过可变节流器RB1，RB2并将其供给到致动器B.两个水泵之间的相互独立性 从而可以确保制浆泵P1，P2。

    Hydraulic drive device of working machine
    10.
    发明授权
    Hydraulic drive device of working machine 失效
    工作机液压驱动装置

    公开(公告)号：US06453585B1

    公开(公告)日：2002-09-24

    申请号：US09980543

    申请日：2001-12-04

    申请人： Kinya Takahashi ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Mitsuhisa Tougasaki

    发明人： Kinya Takahashi ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Mitsuhisa Tougasaki

    IPC分类号： F15B1100

    CPC分类号： E02F9/2267 ,  E02F9/2239 ,  E02F9/2271 ,  E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/162 ,  F15B11/17 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/3116 ,  F15B2211/329 ,  F15B2211/40515 ,  F15B2211/428 ,  F15B2211/7142 ,  F15B2211/78

    摘要： To permit forcedly stopping combining flows of pressure fluid from two hydraulic pumps when a load pressure on a combined-flow-driven actuator in which the flows of pressure fluid are combined together exceeds a predetermined pressure and hence to permit driving the combined-flow-driven actuator with the pressure fluid from only one of the hydraulic pumps, a hydraulic drive system is provided with a flow-combining valve 2 connected to a directional control valve 1 in a first group of directional control valves via a center bypass passage 3, a flow-combining circuit 5 communicating the flow-combining valve 2 and a supply port of a flow-combining directional control valve 4 with each other, and a combined-flow-driven actuator 20 controlled by the flow-combining directional control valve 4, and performs overall power control such that a total value of input torques to the two hydraulic pumps 15,18 does not exceed an output torque from an engine 30. The hydraulic drive system is provided with a canceling valve 10 to cancel the combination of flows by the flow-combining valve 2 when a load pressure on the combined-flow-driven actuator 20 becomes higher than a predetermined pressure.

    摘要翻译： 当压力流体组合在一起的组合流动驱动致动器上的负载压力超过预定压力并因此允许驱动组合流动驱动时，允许强制停止组合来自两个液压泵的压力流体流 致动器与来自仅一个液压泵的压力流体相连，液压驱动系统设置有通过中心旁通通道3连接到第一组方向控制阀中的方向控制阀1的流动合并阀2，流动 将组合阀2和组合方向控制阀4的供给口彼此连通的组合回路5和由组合方向控制阀4控制的组合流动驱动致动器20，并进行 整体功率控制使得两个液压泵15,18的输入转矩的总值不超过来自发动机30的输出扭矩。液压驱动系统设置为w 一个取消阀10，当组合流动致动器20上的负载压力变得高于预定压力时，消除组合阀2的流动的组合。