| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Control valve system with float valve | US43059 | 1993-04-05 | US5331882A | 1994-07-26 | Matthew T. Miller |
| A pilot operated directional control valve communicates fluid between a hydraulic actuator, a pump and a reservoir. A lockout valve is connected between each main control valve work port and a corresponding cylinder port, and operates to reduce fluid leakage therefrom. Each lockout valve includes a pressure responsive poppet valve member which is exposed to fluid pressure in a lockout chamber. A vent control valve is connected between each lockout valve and a corresponding one of the pilot valves. Each vent control valve includes a vent check valve which controls fluid venting from the lockout chamber and a vent piston which is biased to urge the vent check valve to a closed position thereby trapping fluid in the lockout chamber. When both pilot valves are energized, both lockout valves are vented and a float valve moves to a position wherein both cylinder ports are communicated, via the lockout valves and the float valve, with each other and with the reservoir. The float function is obtained without the requirement of additional solenoids or by compromising the available modulation range of the main control valve. | ||||||
| 142 | Hydraulic control device | US832036 | 1992-02-06 | US5259293A | 1993-11-09 | Rudolf Brunner |
| In a hydraulic control device (S) comprising a double-acting hydraulic consumer (V) which is actuable by pressure via two working conduits (4, 5) and secured in at least one working direction by a load holding valve (H) which is hydraulically openable and closable in a controlled way, further comprising a control pressure conduit (12) which is connected to a control connection of the load holding valve and selectively actuable, as well as a damping throttle (13) arranged in control pressure conduit (12), there is provided a valve (15, 15', 15", 15'", 15.sup.IV) which during the controlled closing movement of load holding valve (H, 6) is automatically responsive to a delay of the controlled closing movement which is caused by the instantaneous viscosity of the pressure medium and/or a too tight setting of damping throttle (13) and is critical as to the after-running of hydraulic consumer (V) under a load (F), with the valve switching in such a case to passage and bypassing damping throttle (13). The valve offsets the effect of a pressure medium which is too cold, and/or a setting of the damping throttle that is too tight for an intended damping action with respect to a controlled closing of the load holding valve, and it ensures the rapid closing of the load holding valve as is required for stopping and holding the load, in particular during a safety shut-off operation. | ||||||
| 143 | Power transmission | US880587 | 1986-06-30 | US4724673A | 1988-02-16 | John W. Curnow |
| A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving the element of the actuator in opposite directions and a pump system with load sensing control for supplying fluid to said actuator. A meter-in valve is provided to which the fluid from the pump is supplied and a manual or electrohydraulic controller alternately supplies fluid at pilot pressure to the meter-in valve for controlling the flow therefrom to the actuator to control direction and displacement of movement of the meter-in valve and the direction and velocity of the actuator. A pair of lines extends from the meter-in valve to the respective openings of the actuator. A meter-out valve is associated with each line to the actuator for controlling flow out of the actuator. Each meter-out valve is operated by the pilot pressure from the controller. Provision is made for sensing the maximum load pressure in one of a series of valve systems controlling a plurality of actuators and applying the higher pressure to the load sensing pump system. In addition, combined hydrostat and load drop check valves are provided to provide the dual function of maintaining a predetermined pressure drop across the meter-in valve, independent of actual pressure, which will result in constant flow as well as provide the load drop check valve function of opening during flow from the meter-in valve and closing when the meter-in valve is in neutral for venting of the meter-in valve. | ||||||
| 144 | Arrangement for controlling a hydraulic motor | US431572 | 1982-09-30 | US4531449A | 1985-07-30 | Werner Reith |
| An arrangement for controlling a hydraulic motor having supply and discharge sides, has a throttling directional valve having supply and discharge sides and a port, a speed lowering brake valve controlling the discharge side of the hydraulic motor and having a control piston with a control side and a port connected with said port of said directional valve, a control valve arrangement between the control side of the control piston and the supply side of the hydraulic motor and having end sides with end side ports, the control valve having a control slider which selectively connects the control side of the control piston with the supply side of the hydraulic motor and disconnects the control side of the control piston from the latter, is constantly connected at the end side ports with the discharge side of the hydraulic motor prior or after the directional valve and connects the discharge side of the hydraulic motor after the directional valve with the control side of the control piston or disconnect the discharge side of the hydraulic motor from the latter, the control valve also having a control spring acting upon the control slider in a direction corresponding to a direction in which a pressure medium acts upon the discharge side of the hydraulic motor after the directional valve. | ||||||
| 145 | Hydraulic control circuit | US3654833D | 1970-06-29 | US3654833A | 1972-04-11 | GRIFFITHS THOMAS C |
| A hydraulic control circuit for raising or lowering a load includes a hydraulic ram having a movable load engaging piston therein and a pressure compensated hydraulic pump for supplying fluid thereto for raising a load. Means are provided in the circuit between the pump and the hydraulic ram for controlling the raising and lowering operations of the ram. Further means are provided for locking the position of the load in the event of mechanical or hydraulic failure of any portion of the load raising mechanism.
|
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| 146 | CONTROL DEVICE FOR ZERO-LEAK DIRECTIONAL CONTROL VALVES | PCT/IB2015055358 | 2015-07-15 | WO2016009369A3 | 2016-03-17 | MUSIANI MASSIMILIANO; MESTURINI DAVIDE |
| Hydraulic system, distributor and bidirectional valve to activate the hydraulic actuators (3; 3a, 3b) of an operating machine; the hydraulic system (1) having: a first high-pressure oil delivery (4); an oil drain (8); a slide valve with a spool, which is axially sliding and is suited to control a hydraulic actuator (3); a second low-pressure oil delivery (6); an activation valve (15); and a bidirectional valve (21) with a first passage opening (22) that can be hydraulically connected, by means of the slide valve (9) to the first delivery (4) and a second passage opening (23) hydraulically connected to the actuator (3); wherein, the bidirectional valve has an inlet opening (24) that can be connected, by means of the activation valve (15) to the second delivery (6) and an outlet opening (25) that can be connected, by means of the spool (12) to the drain (8). | ||||||
| 147 | CONTROL ARRANGEMENT WITH PIPE BURST SAFETY FUNCTION | PCT/EP2008004296 | 2008-05-30 | WO2008151727A2 | 2008-12-18 | HEEMSKERK EDWIN |
| The invention relates to a control arrangement with pipe burst safety function for controlling the consumer, comprising an adjustable hydraulic machine that can be used as a pump and as a motor, and a flow-control valve having a metering diaphragm. Control signals can be fed to the hydraulic machine and to the metering diaphragm, which signals adjust the hydraulic machine to a smaller volume flow than the metering diaphragm or to substantially the same volume flow as the metering diaphragm. The arrangement according to the invention allows protection of the cylinder from pipe bursts during lowering while at the same time reducing pressure losses in the normal operation. | ||||||
| 148 | CONTROL SYSTEM FOR A HYDRAULIC ELEMENT | PCT/EP2007006604 | 2007-07-25 | WO2008012082A3 | 2008-06-05 | TRETSCH ADOLF |
| In the case of a control system for a hydraulic element (14) which, under the pressure of hydraulic fluid in a locking pressure space (16) on one side of the hydraulic element (14) enters into an unlocking pressure space (13) on the other side of the hydraulic element (14), wherein the two pressure spaces (13, 16) are connected via a respective line (19) and (20) to the same main line (3, 4), a pressure-regulating valve (18) is to be connected into the line (19) to the unlocking pressure space (13), preventing the fluid from flowing back out of the unlocking pressure space (13). Furthermore, a pressure-compensating valve (21) is to be connected into the line (20) to the locking pressure space (16). | ||||||
| 149 | 플로팅 기능이 구비된 건설기계 | KR1020157015833 | 2012-12-20 | KR101741702B1 | 2017-05-30 | 정원철; 지세립 |
| 도저블레이드를이용하여지면등을평탄하게고르는정지작업등을수행하기위한플로팅기능이구비된건설기계를개시한다. 본발명에따른플로팅기능이구비된건설기계에있어서, 유압펌프및 파일럿펌프; 유압펌프에연결되고, 도저블레이드를상하이동시키는도저실린더; 유압펌프와도저실린더사이의유로에설치되는컨트롤밸브; 컨트롤밸브와도저실린더사이의유로에설치되는도저체크밸브; 컨트롤밸브와유압탱크사이의유로에설치되는리턴체크밸브; 파일럿펌프와도저체크밸브사이의신호통로에개폐가능하게설치되는플로팅용솔레노이드밸브; 유압탱크에일단이연결되고, 컨트롤밸브와도저실린더를연결하는유로에타단이연결되는플로팅용유로; 플로팅용유로에설치되고, 플로팅모드시유압탱크로부터플로팅용유로를통하여도저실린더로작동유를공급하며, 플로팅모드해제시플로팅용유로를차단하는체크밸브를포함하는것을특징으로하는플로팅기능이구비된건설기계를제공한다. | ||||||
| 150 | 유체압 제어 장치 | KR1020147015986 | 2013-01-18 | KR101647571B1 | 2016-08-10 | 이토다츠오; 마에사키미츠히로 |
| 유체압제어장치는, 부하에의한부하압이작용되는실린더의압력실에작동유체가공급되도록전환되어상기실린더의신장동작을제어하는제1 제어밸브와, 상기압력실의작동유체가배출되도록전환되어상기실린더의수축동작을제어하는제2 제어밸브와, 상기압력실과상기제2 제어밸브사이에개재장착되어, 폐쇄상태로전환된경우에상기압력실로부터의작동유체의배출을차단하는오퍼레이트체크밸브와, 상기제2 제어밸브를파일럿압에의해파일럿조작함과함께, 당해파일럿압에의해상기오퍼레이트체크밸브를개방상태로전환하는파일럿밸브를구비한다. | ||||||
| 151 | 유압식 부하 조절 밸브 장치 | KR1020097023267 | 2008-05-12 | KR101592453B1 | 2016-02-05 | 안데르손보 |
| 핸드밸브(H)와유압엔진(D) 사이에수용된유압식부하조절밸브(10)는, 엔진에의유압유의흐름에무관하게펌프압력에의해조절되는하나이상의비례부하조절밸브(E)를갖는다. 엔진(D)에의유량이논리턴밸브(12)를경유하여흐르고, 논리턴밸브(12)는펌프압력의소정의압력구간이전의상한치위의펌프압력에서개방하도록프리스트레스되며, 이소정의압력구간내에서, 부하조절밸브(E)가완전폐쇄위치와완전개방위치사이에서조정된다. | ||||||
| 152 | 건설기계의 붐 제어용 유압회로 | KR1020137025495 | 2011-04-19 | KR1020140010414A | 2014-01-24 | 김성곤 |
| 붐을 조작하지않은 상태에서, 과부하가 가해지는 경우에 붐실린더의 라지챔버로부터 릴리프되는 작동유가 오리피스를 경유토록 하여 붐 하강되는 것을 완화시키기 위한 건설기계의 붐 제어용 유압회로를 개시한다.
본 발명에 따른 건설기계의 붐 제어용 유압회로에 있어서, 유압펌프에 제1통로 및 제2통로를 통해 연결되는 붐실린더와, 유압펌프와 붐실린더사이의 유로에 설치되는 붐 제어밸브와, 붐 제어밸브와 붐실린더의 제1통로사이에 설치되어 붐 제어밸브의 중립시 붐 자연하강을 방지하는 홀딩밸브와, 홀딩포펫의 하류측으로 제1통로에 설치되며, 제1통로에 과부하 발생시 작동유를 릴리프시키는 포트 릴리프밸브와, 포트 릴리프밸브의 하류측에 설치되며, 붐 제어밸브의 중립시 포트 릴리프밸브를 통과하는 작동유는 오리피스를 통과시켜 릴리프시키고, 붐 제어밸브에 인가되는 붐 업 파일럿 신호압에 의해 절환시 포트 릴리프밸브를 통과하는 작동유를 유압탱크로 배출시키는 오리피스 밸브를 포함하는 것을 특징으로 하는 건설기계의 붐 제어용 유압회로� � 제공한다. |
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| 153 | 유압식 부하 조절 밸브 장치 | KR1020097023267 | 2008-05-12 | KR1020100016316A | 2010-02-12 | 안데르손보 |
| A hydraulic load control valve (10) accommodated between a hand valve (H) and a hydraulic engine (D) has got at least one proportional load control valve (E), controlled by the pump pressure independent of the flow of hydraulic fluid to the engine. The flow to the engine (D) flows via a non-return valve (12), that is prestressed to open at a pump pressure above the upper limit before a given pressure interval, within which the load control valve (E) is adjusted between completely closed and com- pletely open position of the pump pressure. | ||||||
| 154 | 유체압 구동유닛 및 제설장치 | KR1020097018875 | 2008-04-24 | KR1020100014967A | 2010-02-11 | 사토오사무; 사카이요시타케; 니시오카시로 |
| There is provided a fluid pressure drive unit that can fulfill a position holding function stably even when an external force acts during the time when the position is held, the unit being used, for example, for the right and left angle adjustment of a snow plow blade. There is provided a first excessive load relief valve 6 for letting a working fluid escape from a bottom-side pipe line 10a, which connects the bottom-side port of a single-rod double acting cylinder 2 to the bottom side of an operate check valve 4, to a rod-side pipe line 10b, which connects the rod-side port of the single-rod double acting cylinder 2 to the rod side of the operate check valve 4, and there is provided a second excessive load relief valve 7 for letting the working fluid escape from the rod-side pipe line 10b to a tank 3. Also, there is provided a negative pressure preventing check valve 8 for allowing the working fluid to flow into the bottom-side pipeline 10a from the tank 3. | ||||||
| 155 | 전자식 유압 누출 보상 장치 및 방법 | KR1020090043672 | 2009-05-19 | KR1020090121233A | 2009-11-25 | 토마스하이드리히; 요하네스슈어만 |
| PURPOSE: An electro-hydraulic leakage compensating device and a method therefor are provided to start a lifting unit without shaking by checking a state when pressure is made just before a mechanical brake is released. CONSTITUTION: An electro-hydraulic leakage compensating device includes an oil hydraulic motor(5) and a pressure sensor(13). The electro-hydraulic leakage compensating device is connected to lifting units(6,7), a down brake valve(4) and a mechanical brake(9). The pressure sensor measures prevailing pressure in a load side and a rising flow path(3) of the oil hydraulic motor inside the oil hydraulic circuit. | ||||||
| 156 | 외부 파일럿 작동형 홀딩밸브를 갖는 유압회로 | KR1020070127657 | 2007-12-10 | KR1020090060732A | 2009-06-15 | 황태인 |
| A hydraulic circuit having an external pilot operating-typed holding valve is provided to prevent a flickering phenomenon due to noise and vibration and to improve efficiency of work. A hydraulic circuit having an external pilot operating-typed holding valve includes a hydraulic pump(P), a pilot pump(Pp), a hydraulic cylinder(1), a main control valve(2), a joystick(11), a double check valve(6), and a selector valve(7). The hydraulic pump and the pilot pump are connected to an engine. The hydraulic cylinder drives an operating unit. The main control valve controls driving, pausing and redirection of the hydraulic cylinder. The joystick outputs pilot signal pressure of the pilot pump. The selector valve changed by the pilot signal pressure opens the double check valve. | ||||||
| 157 | 2개이상의전자기적으로작동하는비례방향전환밸브요소를갖는로드를승강시키기위한모노블록구조의유압식제어장치 | KR1019970704117 | 1995-11-16 | KR100409141B1 | 2004-04-03 | 산다우하르트무트; 슈마허베르너; 투르크세스라이너; 루오이에스홀거 |
| A hydraulic circuit in a monoblock structure for lifting and lowering a load has at least two electromagnetically actuatable proportional distributing valve elements, a check valve, a pressure balance for load-independent lifting of the load as an input element, a housing accommodating at least some of the elements and having at least one pump connection, at least one consumer connection, and at least one return connection, the proportional distributing valve elements being disposed parallel to one another, electromagnetic drives seated side-by-side on a same side and at a same height, the pressure balance having a piston which is disposed coaxially next to a longitudinal slide of a first one of the proportional distributing valve elements in a bore that guides and supports both the valve elements, the longitudinal slide of the first proportional distributing valve elements being spring-loaded, and at least one component for adjusting a prestressing and bracing of a spring on the housing of a control penetrating the piston of the pressure balance. | ||||||
| 158 | 건설중장비용 유압밸브의 제어장치 | KR1020010081836 | 2001-12-20 | KR1020030052031A | 2003-06-26 | 김진욱 |
| PURPOSE: A hydraulic valve control device for heavy construction equipments is provided to reduce fatigue and increase working efficiency by preventing sudden fall of an actuator at neutral state of a main spool or in switching, and to improve stability by smoothly moving the actuator down. CONSTITUTION: A hydraulic valve control device is composed of an actuator driven by actuating fluid discharged from a hydraulic pump; a main spool opening the passage between the hydraulic pump and the actuator and switching in applying pilot signal pressure; a poppet(34) opening the passage between the main spool and the actuator and preventing fall of the actuator; a spool(22) switching for communicating a back pressure chamber(41) with a passage(36) of the main spool through drain passages(29,30,32,33) in applying the pilot signal pressure; and a passage(27) reducing the flow by communicating with an outlet passage(39) of the back pressure chamber in switching the spool. | ||||||
| 159 | 유압식 승강기를 위한 제어밸브유닛 | KR1020027002081 | 2001-06-01 | KR1020020030792A | 2002-04-25 | 벨레토팍,지드; 델레,루이기; 쉬렘프,안드레아스 |
| 본발명은유압식승강기를위한제어밸브장치(28)와관련된다. 상기제어밸브장치는승강기차를동작시키는리프팅실린더로부터의, 또는리프팅실린더로부터탱크로의유압오일의흐름을제어하는기능을하는두 개의제어밸브(5, 15)로구성된다. 승강기차가상승할때는, 전기모터에의해구동되는펌프에의해제어밸브유닛(28)을통해탱크로부터리프팅실린더로유압오일이전달된다. 승강기차가하강할때는, 펌프의작동없이제어밸브유닛(28)을통해유압오일이탱크로흐른다. 본발명에따르면, 승강기차의상승및 하강운동을제어하는각각의경우에제어밸브유닛(28)에서하나의제어밸브(control valve)(5, 15)가제공된다. 그리고상기밸브각각은역류방지밸브(return valve)와비례밸브(proportional valve)로써동시에작동한다. 유동제한부재(35; 55)는제어밸브(5, 15)의각각에제공된다. 그리고밸브시트(36; 56)에대하여움직이는것이가능하다. 이경우에한편으로는회복스프링(readjusting spring)(37, 57)이, 다른한편으로는릴레이밸브(relay valve)(515)가유동제한부재(35; 55)에따라서작동한다. 그리고, 각각의스프링이나밸브가전기적으로구동될수 있는비례자석(5; 15)에의해구동되는것이가능하다. 제어밸브유닛(28)이이렇게해서아주간결하게구성이되고이에상응하여효율적인원가로생산될수 있다. 다른어떤적응부재가필요하지아니하다는것이특히장점이다. | ||||||
| 160 | 자급식 에너지 효율적인 유압 액추에이터 시스템 | KR1020177012569 | 2015-10-08 | KR1020170066616A | 2017-06-14 | 체스터,마크브이. |
| 본발명의자급식에너지효율적유압액추에이터시스템은유압실린더, 0 RPM에서최대정격 RPM까지정격토크를생산하고로터의속도와위치를서보모터에피드백하는서보모터, 펌프및 모터작동없이유압실린더의위치를유지하는솔레노이드밸브를포함한다. 상기시스템은솔레노이드밸브를사용하여모터의작동없이하중을제자리에유지하고, 이에따라, 에너지를절약하고모터작동시간을최소화하여모터의수명을연장한다. | ||||||
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