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    Hydraulic circuit having holding valve of external pilot pressure operation type
    15.
    发明授权
    Hydraulic circuit having holding valve of external pilot pressure operation type 有权
    具有外部先导压力操作型保持阀的液压回路

    公开(公告)号：US08146482B2

    公开(公告)日：2012-04-03

    申请号：US12274498

    申请日：2008-11-20

    申请人： Tae In Hwang

    发明人： Tae In Hwang

    IPC分类号： F15B13/04

    CPC分类号： F15B11/003 ,  F15B13/01 ,  F15B2211/20523 ,  F15B2211/20576 ,  F15B2211/3051 ,  F15B2211/30515 ,  F15B2211/30525 ,  F15B2211/3111 ,  F15B2211/3127 ,  F15B2211/31576 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/5756 ,  F15B2211/6355 ,  F15B2211/8613

    摘要： A hydraulic circuit having a holding valve of an external pilot pressure operation type is provided, which can make a double check valve, which is installed to prevent an actuator from being pushed due to leakage of hydraulic fluid of a main control valve, be opened by an external signal pressure being supplied to shift the main control valve. The hydraulic circuit includes a double check valve installed in a flow path between the main control valve and the hydraulic cylinder to be opened by the pilot signal pressure for shifting the main control valve, and preventing the hydraulic cylinder from being moved due to leakage of hydraulic fluid of the main control valve, and a select valve shifted to open the double check valve in response to the pilot signal pressure being supplied in accordance with the manipulation of the joystick.

    摘要翻译： 提供一种具有外部先导式压力操作型保持阀的液压回路，其可以使得由于主控制阀的液压流体的泄漏而防止致动器被推动而安装的双止回阀被打开 提供外部信号压力以移动主控制阀。 液压回路包括安装在主控制阀和液压缸之间的流路中的双重止回阀，以通过用于移动主控制阀的先导信号压力打开，并且防止液压缸由于液压泄漏而移动 主控制阀的流体，以及响应于根据操纵杆的操纵提供的导频信号压力而移动以打开双止回阀的选择阀。

    Selector Valve Operating Mechanism for Working Vehicle
    18.
    发明申请
    Selector Valve Operating Mechanism for Working Vehicle 有权
    工作车辆选择阀操作机构

    公开(公告)号：US20110175005A1

    公开(公告)日：2011-07-21

    申请号：US13119034

    申请日：2009-08-05

    申请人： Kunihiko Sakamoto ,  Nagahiro Ogata ,  Masaaki Yamashita

    发明人： Kunihiko Sakamoto ,  Nagahiro Ogata ,  Masaaki Yamashita

    IPC分类号： F16K31/02

    CPC分类号： E02F9/2004 ,  E02F3/964 ,  E02F9/2267 ,  E02F9/2271 ,  E02F9/2275 ,  F15B13/042 ,  F15B2211/3111 ,  F15B2211/31576 ,  F15B2211/321 ,  F15B2211/324 ,  F15B2211/329 ,  F15B2211/5059

    摘要： The structures of oil paths and switching control of a mechanical selector valve for controlling a hydraulic actuator and the cost of parts of the mechanical selector valve are respectively simplified and reduced to levels not achievable by an electromagnetic selector valve. However, simple and quick switching operation of the mechanical selector valve by the use of a nearby switch which requires small force to actuate is difficult, and this makes the mechanical selector valve less easy to operate than the electromagnetic selector valve. A selector valve operating mechanism (110) is provided with operating pistons (176, 179) which are hydraulic pistons connected through an operation link (161) to a spool (145) of a PTO selector valve (240), an solenoid valve (113) for hydraulically controlling reciprocation of the operating pistons (176, 179), and a controller (123) which is a control device for transmitting an operation signal to the solenoid valve (113). Control of operation of the solenoid valve (113) moves the spool (145) through the operating pistons (176, 179) and the operation link (161) to switch the PTO selector valve (240).

    摘要翻译： 用于控制液压致动器的机械选择阀的油路结构和切换控制以及机械选择阀的部件的成本分别被简化并且减小到电磁换向阀不能实现的水平。 然而，通过使用需要较小力来致动的附近开关，机械选择阀的简单和快速的切换操作是困难的，这使得机械切换阀比电磁选择阀更不容易操作。 选择阀操作机构（110）设有操作活塞（176,179），其是通过操作连杆（161）连接到PTO选择阀（240）的阀芯（145）的液压活塞，电磁阀（113） ），用于液压控制操作活塞（176,179）的往复运动;以及控制器（123），其是用于将操作信号传送到电磁阀（113）的控制装置。 电磁阀（113）的操作控制通过操作活塞（176,179）和操作连杆（161）使阀芯（145）移动以切换PTO选择阀（240）。

    Hydraulic supply systems
    19.
    发明授权
    Hydraulic supply systems 有权
    液压供油系统

    公开(公告)号：US07900445B2

    公开(公告)日：2011-03-08

    申请号：US11697900

    申请日：2007-04-09

    申请人： Andreas Brockmann

    发明人： Andreas Brockmann

    IPC分类号： F15B11/16 ,  E02F9/22

    CPC分类号： F15B11/162 ,  F15B11/168 ,  F15B2211/30505 ,  F15B2211/30535 ,  F15B2211/3111 ,  F15B2211/3127 ,  F15B2211/327 ,  F15B2211/40515 ,  F15B2211/41509 ,  F15B2211/45 ,  F15B2211/6051 ,  F15B2211/6054 ,  F15B2211/6055 ,  F15B2211/6057 ,  F15B2211/6058 ,  F15B2211/651 ,  F15B2211/7142 ,  F15B2211/78 ,  F15B2211/781 ,  Y10T137/0324

    摘要： Disclosed is a hydraulic system for supplying primary and auxiliary pressure medium consumers with different system pressures, which exceed the load pressure by a pre-determined control pressure differential. Primary load pressure is used to produce a first control pressure differential for operating a primary pressure medium consumer. Auxiliary load pressure is converted in an amplifying device to produce a second, higher control pressure differential for operating an auxiliary pressure medium consumer. The amplifying device consists of a pressure reducing valve, which is permanently adjusted to a pre-determined reduced pressure and has a line conducting the system pressure connected to a first pressure inlet, a load reporting line conducting the load pressure of the auxiliary pressure medium consumer connected to a second inlet and a load reporting line subjecting the pressure control valve to increased load pressure connected to an outlet and the control piston is subjected on its one side to the force of a permanently adjusted spring.

    摘要翻译： 公开了一种液压系统，用于向初级和辅助压力介质消耗者提供不同的系统压力，其通过预定的控制压力差超过负载压力。 初级负载压力用于产生用于操作初级压力介质消耗器的第一控制压力差。 辅助负载压力在放大装置中转换以产生用于操作辅助压力介质消耗器的第二较高控制压差。 放大装置由减压阀组成，该减压阀被永久地调节到预定的减压，并具有连接到第一压力入口的系统压力的管线，负载报告线，其传导辅助压力介质消耗器的负载压力 连接到第二入口和负载报告线路，使压力控制阀增加连接到出口的负载压力，并且控制活塞在其一侧受到永久调节的弹簧的力。

    Anti-saturation valve assembly for load sensing hydraulic system
    20.
    发明授权
    Anti-saturation valve assembly for load sensing hydraulic system 有权
    用于负载传感液压系统的抗饱和阀组件

    公开(公告)号：US07866151B2

    公开(公告)日：2011-01-11

    申请号：US11658134

    申请日：2005-07-22

    申请人： Isidoro Livraghi

    发明人： Isidoro Livraghi

    IPC分类号： B62D5/07 ,  F15B11/16

    CPC分类号： F15B11/162 ,  B62D5/07 ,  F15B11/166 ,  F15B2211/30585 ,  F15B2211/3111 ,  F15B2211/325 ,  F15B2211/329 ,  F15B2211/40515 ,  F15B2211/41527 ,  F15B2211/428 ,  F15B2211/45 ,  F15B2211/473 ,  F15B2211/50518 ,  F15B2211/5159 ,  F15B2211/6051 ,  F15B2211/6355 ,  F15B2211/7142 ,  F15B2211/781

    摘要： An anti-saturation valve assembly (51) for use in a hydraulic system having priority (17) and auxiliary (25) load circuits, the priority circuit providing a priority load signal (19). The anti-saturation valve assembly includes a pressure sensor portion (61) which senses a decrease between pump pressure (23) and the priority load signal (19), and generates a force on a pressure reducing portion (63) to reduce, correspondingly, a pilot pressure (59): The reduced pilot pressure to a pilot valve (35) results in reduced flow to a pilot-operated main control valve (27) in the auxiliary load circuit (25), thus providing anti-saturation protection for the circuit, without throttling a main flow path and wasting substantial hydraulic power.

    摘要翻译： 一种用于具有优先级（17）和辅助（25）负载电路的液压系统的抗饱和阀组件（51），所述优先电路提供优先级负载信号（19）。 抗饱和阀组件包括压力传感器部分（61），其感测泵压力（23）和优先级负载信号（19）之间的减小，并且在减压部分（63）上产生力， 先导压力（59）：向先导阀（35）的先导压降低导致辅助负载回路（25）中先导操作的主控制阀（27）的流量减少，从而为 电路，而不会节流主流路并浪费大量的液压功率。