公开(公告)号：US06530390B2

公开(公告)日：2003-03-11

申请号：US09883686

申请日：2001-06-18

申请人： Shinobu Nagura ,  Shuuji Hori

发明人： Shinobu Nagura ,  Shuuji Hori

IPC分类号： G01D700

CPC分类号： E02F9/2285 ,  E02F9/2232 ,  E02F9/2246 ,  E02F9/2296 ,  F15B11/0423 ,  F15B13/025 ,  F15B13/026 ,  F15B2211/20523 ,  F15B2211/20553 ,  F15B2211/255 ,  F15B2211/50554 ,  F15B2211/50563 ,  F15B2211/522 ,  F15B2211/57 ,  Y10T137/1044 ,  Y10T137/2544

摘要： The invention provides a pressure reducing valve in which a minimum pressure can be secured even when an engine speed is reduced. A pressure reducing valve changing an output pressure in correspondence to an engine speed has means for outputting a predetermined minimum pressure when the engine speed is equal to or less than a first predetermined rotational speed.

公开(公告)号：US06561751B1

公开(公告)日：2003-05-13

申请号：US09666138

申请日：2000-09-20

申请人： Naoki Ishizaki ,  Shuuji Hori ,  Shinobu Nagura

发明人： Naoki Ishizaki ,  Shuuji Hori ,  Shinobu Nagura

IPC分类号： B66F900

CPC分类号： E02F3/433 ,  E02F9/2225 ,  E02F9/2285 ,  F15B11/163 ,  F15B11/20 ,  F15B2211/30535 ,  F15B2211/50536 ,  F15B2211/57 ,  F15B2211/575 ,  F15B2211/6313 ,  F15B2211/6336 ,  F15B2211/6355 ,  F15B2211/6654 ,  F15B2211/71 ,  F15B2211/75

摘要： A high versatility can be obtained, the pipe laying can be configured easily and, by virtue of the fact that a pilot pressured oil is managed, a hydraulic apparatus can be compacted. A differential pressure &Dgr;P between a pressure of the pressured oil on an upstream side and a pressure of the pressured oil on a downward side of operation valves is set to a certain value by a front-to-rear differential pressure stabilizer. As a result, flow rates Q1, Q2 of the operation valves are determined univocally in accordance with opening surface areas (opening amounts) A1, A2 of the operation valves, irrespective of load fluctuations, that is to say, a fluctuation of &Dgr;P. When one of operation members are operated, the opening amount A2 of the other operation valve correspondent with the other operation member is changed in accordance with an operation amount S1 of that operation member, and the other hydraulic actuator correspondent with the other operation valve is driven.

摘要翻译： 可以获得高通用性，可以容易地构造管道敷设，并且由于管理先导式加压油的事实，可以压缩液压装置。 在上游侧的加压油的压力与操作阀的下侧的加压油的压力之间的差压DELTAP通过前后差压稳定器设定为一定值。 结果，操作阀的流量Q1，Q2根据操作阀的开口面积（开口量）A1，A2单独确定，而不管负载波动如何，即DELTAP的波动。 当操作构件中的一个操作时，与其他操作构件相对应的另一个操作阀的开口量A2根据该操作构件的操作量S1而改变，并且与其他操作阀对应的另一个液压致动器被驱动 。

公开(公告)号：US06666023B2

公开(公告)日：2003-12-23

申请号：US10013694

申请日：2001-12-13

申请人： Shinobu Nagura ,  Toshio Ozawa ,  Norihide Mizoguchi

发明人： Shinobu Nagura ,  Toshio Ozawa ,  Norihide Mizoguchi

IPC分类号： F16D3102

CPC分类号： E02F9/2292 ,  E02F9/2004 ,  E02F9/2232 ,  E02F9/2253 ,  E02F9/226 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/165 ,  F15B11/167 ,  F15B2211/20538 ,  F15B2211/20546 ,  F15B2211/20553 ,  F15B2211/20584 ,  F15B2211/30525 ,  F15B2211/355 ,  F15B2211/635 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/7135

摘要： A fluid-pressure transmitting apparatus that is capable of securing the operationality of a working machine and braking and preventing against engine stall. The apparatus can switch between a working-machine operating device and a traveling operating device. When a second operating unit is operated during operation of a first operating unit, the pilot pressurized oil outputted from each operating means through first and second pilot-pressure admission passages is admitted to a low-pressure selecting valve. At this time, the pilot pressurized oil is automatically selected through the low-pressure selecting valve to control the delivery capacity of the traveling pump and braking and preventing engine stall and realizing travel at low speed.

摘要翻译： 一种流体压力传递装置，其能够确保作业机械的操作性并制动并防止发动机失速。 该设备可以在工作机器操作装置和行驶操作装置之间切换。 当在第一操作单元的操作期间操作第二操作单元时，通过第一和第二先导压力进入通道从每个操作装置输出的先导加压油被允许进入低压选择阀。 此时，通过低压选择阀自动选择先导加压油，以控制行驶泵的输送能力，制动和防止发动机失速并实现低速行驶。

公开(公告)号：US06922989B2

公开(公告)日：2005-08-02

申请号：US10613067

申请日：2003-07-07

申请人： Shinobu Nagura ,  Kazuhiro Maruta ,  Nobumi Yoshida

发明人： Shinobu Nagura ,  Kazuhiro Maruta ,  Nobumi Yoshida

IPC分类号： E02F9/22 ,  F15B1/02 ,  F15B11/17 ,  F15B21/14 ,  F16D31/02 ,  F15B9/10

CPC分类号： F15B11/17 ,  F15B1/024 ,  F15B21/14 ,  F15B2211/20546 ,  F15B2211/20569 ,  F15B2211/20576 ,  F15B2211/214 ,  F15B2211/30565 ,  F15B2211/30595 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/7142 ,  F15B2211/78 ,  F15B2211/88 ,  F16D31/02

摘要： It is an object of the present invention to provide a plural pressure oil energies selective recovery apparatus which can selectively recover pressure oil energies stored in plural pressure oil actuators, based upon recovery conditions. A priority for recovering a return pressure oil from a hydraulic actuator is set in advance for an operation lever of each of the plural hydraulic actuators. If the operation lever is in the non-actuation state at a preceding detection point, the plural pressure oil energies selective recovery apparatus recovers a return pressure oil from a corresponding hydraulic actuator. If the operation lever is in the actuation state, the plural pressure oil energies selective recovery apparatus does not recover a pressure oil.

摘要翻译： 本发明的目的是提供一种能够基于回收条件选择性地回收储存在多个压力油致动器中的压力油能的多压力油选择回收装置。 对于多个液压致动器中的每一个的操作杆，预先设置用于从液压致动器恢复返回压力油的优先级。 如果操作杆在前一检测点处于非致动状态，则多个压力油能选择回收装置从相应的液压致动器回收返回压力油。 如果操作杆处于致动状态，则多个压力油能选择回收装置不能回收压力油。

公开(公告)号：US06564549B2

公开(公告)日：2003-05-20

申请号：US09871808

申请日：2001-06-04

申请人： Shinobu Nagura ,  Seita Hayashi

发明人： Shinobu Nagura ,  Seita Hayashi

IPC分类号： F16D3102

CPC分类号： F16H61/4157 ,  B60T1/08 ,  F16H61/42 ,  Y10T477/631

摘要： In a direct drive type hydraulic pump, the displacement of the hydraulic pump is forcedly changed to a desired displacement according to an instruction of a channel different from a usual instruction, thereby changing to a desired displacement quickly with good responsivity. When an emergency brake switch is turned on, an emergency brake signal is entered an emergency brake control valve. Thus, an emergency brake signal pressure is entered a piston through an emergency brake signal oil passage, and a piston is forcedly positioned in a neutral position. In other words, the piston can be forcedly positioned in the neutral position according to the emergency brake signal regardless of the entry of a usual brake signal. Therefore, the displacement of the hydraulic pump can be forcedly changed to the neutral position (minimum displacement).

摘要翻译： 在直接驱动型液压泵中，根据与通常指令不同的通道的指令，液压泵的排量被强制地改变为期望的位移，从而以良好的响应度快速地变为期望的位移。 当紧急制动开关打开时，紧急制动信号进入紧急制动控制阀。 因此，紧急制动信号压力通过紧急制动信号油路进入活塞，并且活塞被强制地定位在中立位置。 换句话说，不管进入通常的制动信号，活塞可以根据紧急制动信号被强制地定位在中立位置。 因此，液压泵的排量可以强制变为中间位置（最小排量）。