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WO/2014/148855A1 |
The present invention relates to a method for controlling a hydraulic system of construction machinery. The method for controlling a hydraulic system of construction machinery according to the present invention comprises an engine RPM pr...
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WO/2014/148748A1 |
The present invention relates to an apparatus for controlling a hydraulic pump for a construction machine. The apparatus for controlling a hydraulic pump for a construction machine according to the present invention comprises: a hydrauli...
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WO/2014/142562A1 |
The present invention relates to a hydraulic system for a construction machine, and more particularly, to a hydraulic system for a construction machine including a plurality of actuators. Each of the actuators has a pump/motor, is operat...
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WO/2014/135285A1 |
An object of the present invention is to solve such problems associated with installing of a spool-type regenerative valve, in that an overall installation space of a hydraulic valve increases and processing that requires accuracy become...
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WO/2014/134441A1 |
A piezoelectric valve has a body with an input passage and an output passage each configured to connect to a fluid flow system, a flow control member movable with respect to the valve seat between a fully open position and a closed posit...
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WO/2014/129676A1 |
Disclosed is a hydraulic system for a construction machine, provided with a protection device, wherein a flow rate discharged from a hydraulic pump is controlled according to oil temperature and a driver can be informed of the informatio...
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WO/2014/125458A1 |
Mechanical coupling assembly comprising a first component (100; 200; 300; 400) having a first wall, and a second component (200; 300; 400; 500) having a second wall, wherein the first wall of the first component (100; 200; 300; 400) is c...
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WO/2014/123251A1 |
Disclosed is a construction equipment pressure control valve for preventing a natural lowering phenomenon of an operation device due to the leakage of working oil in a neutral position of the operation device. According to the present in...
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WO/2014/121088A1 |
A valve includes a pressure limiting flow spool disposed in a valve body. The spool is movable in a first direction from a first position to a second position and in the first direction from the second position to the third position. The...
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WO/2014/121081A1 |
A hydraulic valve assembly includes an inlet; an outlet; a pressure compensator upstream of the inlet; and a pressure limited flow priority boost valve spool movable between a first position and a second position and comprising an outer ...
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WO/2014/115907A1 |
Disclosed are a device and a method for controlling a flow rate in construction machinery for stationery work for evenly leveling the ground by means of the weight of a boom, without supplying working oil to a hydraulic cylinder from a h...
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WO/2014/112719A1 |
A joystick pilot valve having an oil leakage preventing structure, according to the present invention, includes: a valve body (3) having a working fluid chamber (6) and a supply port (7) therein; at least one spool (8) which is inserted ...
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WO/2014/111096A1 |
The invention concerns a two-stage hydraulic servo valve, the regulating control member of which is a stem disposed inside the main control member, which is the main slide. The valve is suitable for medium to high flow rates and can thus...
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WO/2014/108445A1 |
The invention relates to a device for blowing a gaseous or liquid medium at individual pieces of a material flow that are conveyed over a free-fall path or a link conveyor, comprising a housing (12) having at least one connection opening...
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WO/2014/106230A1 |
A double-solenoid directional control valve comprising a valve body and a valve spool within the valve body, where the valve spool is configured to move within the valve body between a first position, a second position and a third positi...
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WO/2014/096630A1 |
The invention relates to a hydraulic distributor comprising: a housing, a metering slide mounted so that it can slide in the housing, at least one pressure compensator mounted so that it can slide in said metering slide. The metering sli...
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WO/2014/092355A1 |
The present invention relates to an automatic control system which controls a construction operation apparatus to which a joystick is applied and, more particularly, to an automatic control system for a joystick control-based constructio...
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WO/2014/092222A1 |
Disclosed is a hydraulic circuit for a construction machine, which is capable of increasing the temperature of the hydraulic fluid to the level appropriate for operating equipment even without boarding the seat of the driver before start...
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WO/2014/084862A1 |
Systems and methods are described for actuating a plurality of pneumatic valves to positively isolate one or more pieces of equipment. A manual valve can be disposed on a supply conduit that fluidly couples each of the pneumatic valves t...
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WO/2014/083493A1 |
Described herein is a valve assembly (1; 1') in particular designed for use in a pneumatic network (N) and comprising a first valve (2), a second valve (4), and a third valve (6). The second valve (4) and the third valve (6) are configur...
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WO/2014/079615A1 |
The invention relates to a method for producing a valve device (1) having a valve block (2) and at least one attachment part (3, 4) contacting a contact surface (7, 8) of the valve block (2), wherein the valve block (2) is produced by me...
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WO/2014/067640A1 |
Valve with a spool for the control of the start and of the stop of a hydraulic motor (17) in which an oblong spool (4) is mobile within an oblong seat (3) obtained in a body, the movement of the spool being controllable in two opposite d...
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WO/2014/067204A1 |
An expansion valve block, comprising: a first mounting side and an oppositely disposed second mounting side; a first control valve mounting area (10) disposed on the first mounting side, and comprising first control valve mounting area o...
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WO/2014/066592A1 |
A hydraulic valve is provided that includes an interior spool and a surrounding cage. A supply port and a return port are connected to the cage and the interior of the cage is in fluid communication with a control port. The interior spoo...
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WO/2014/061834A1 |
Disclosed is an automatic pressure control device for a construction machine for constantly maintaining an initially set pressure of a main relief valve which sets a maximum pressure of a hydraulic system. According to the present invent...
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WO/2014/056592A1 |
The invention relates to a valve block (10) comprising a plurality of main sliders (40), which are supplied in parallel with pressure fluid via a first and a second pump conduit (80; 81), the fluid stream, which flows in from the respect...
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WO/2014/048181A1 |
Disclosed is a modular combined electrohydraulic multi-way valve system using a compact two-way cartridge valve, comprising: two reversible controlled cavities which are controlled by two groups of, each group comprising two, compact two...
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WO/2014/047874A1 |
Disclosed is a proportional steering valve, comprising a directional control valve and a proportional throttle valve (4), wherein the directional control valve is at least provided with an oil inlet port (10), an oil return port (11), a ...
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WO/2014/051472A1 |
A hydraulic system for a work machine, comprising a first and a second hydraulic actuator: a first and a second hydraulic machine for providing hydraulic fluid to at least one of the first and the second actuator via a first and a second...
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WO/2014/037090A1 |
The invention relates to a fluidic actuator comprising a drive element (2) that can be supplied with a pressure fluid and a two-stage proportional position controller (3) controlling the supply with pressure fluid to the drive element, s...
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WO/2014/037089A1 |
The invention relates to a controlled three-way proportional valve unit comprising: a valve assembly with two individual valves; an actuating device actuating the individual valves of the valve assembly; and a control unit (21) acting up...
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WO/2014/034974A1 |
Disclosed is a hydraulic system for a construction machine which prevents a working fluid from being excessively supplied to a hydraulic actuator of a lower pressure due to a pressure difference between hydraulic actuators when working w...
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WO/2014/036224A1 |
A hydraulic control system (50) includes an implement (16) movable to perform an excavation cycle having a plurality of segments, a variable displacement motor (49) configured to swing the implement (16) at a desired speed during the exc...
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WO/2014/036235A1 |
A hydraulic control system (50) is disclosed for use in a machine (10). The hydraulic control system may have a work tool (16), a motor (49) configured to swing the work tool, a tank (60), a pump (58) configured to draw fluid from the ta...
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WO/2014/034969A1 |
Disclosed is a hydraulic system wherein a driver first selects or disengages a function when performing, by way of example, an excavation operation or suspend operation using an excavator. The hydraulic system according to the present in...
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WO/2014/036232A1 |
A hydraulic control system (150) for a machine (10) is disclosed. The hydraulic control system may have a tank (64), a pump (53) configured to draw fluid from the tank and pressurize the fluid, an actuator (49), and a control valve (63) ...
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WO/2014/036229A1 |
A hydraulic control system (50) is disclosed for use with a machine (10). The hydraulic control system may have a tank (60), a pump (58), a swing motor (49), and at least one control valve (56) configured to control fluid flow between th...
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WO/2014/035984A2 |
The invention is directed to controlling a hydraulic actuation system (50) having at least one degree of freedom, a prime mover (101), at least one actuation module (110, 120, 130) and a controller (103), with each actuation module (110,...
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WO/2014/036226A1 |
An electro-hydraulic control system (22) manages speed of a hydraulic fan (17) by using a solenoid (25) to bias a three position pool (24) of a control valve (23) coupled to a hydraulic pump (30) driving the fan (17). In a first position...
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WO/2014/027706A1 |
The present invention relates to a hydraulic control valve for construction machinery that is used to maintain secondary pilot pressure which is formed proportionally to the switching of a switching device so as to be equal to or below a...
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WO/2014/019647A1 |
The invention relates to a valve, in particular a pilot-operated proportional directional poppet valve, having a valve housing (7) which has a fluid inlet (21) and a fluid outlet (23), wherein the fluid stream between the fluid inlet (21...
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WO/2014/022334A2 |
A hydraulic flow sensing apparatus is provided. The apparatus includes: a manifold; a hole in the manifold in fluid communication with a fluid pathway; a poppet valve in the hole in the manifold configured to move when fluid in the pathw...
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WO/2014/022202A1 |
A system can include one or more valve arrangements (12, 240, 242, 244, 246, 410, 510, 312, 314, or 316) with a working chamber (W) to receive a working fluid at a first pressure, and a control chamber (C) to receive fluid at a second pr...
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WO/2014/019648A1 |
The invention relates to a valve, in particular a pilot-operated proportional directional poppet valve, having a valve housing (7) which has a fluid inlet (21) and a fluid outlet (23), wherein the fluid stream between the fluid inlet (21...
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WO/2014/022152A1 |
A hydraulic system (56) is disclosed. The hydraulic system may have a pump (66) configured to draw low-pressure fluid from one of a first passage (68) and a second passage (70) and discharge fluid into the other of the first and second p...
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WO/2014/022534A1 |
A valve for selectively fluidly communicating a first fluid volume and a second fluid volume includes a valve body, an inlet orifice in fluid communication with the first fluid volume, and an outlet aperture in fluid communication with t...
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WO/2014/018606A1 |
A fluid sensing and distributing apparatus having a distribution plate and an indexing plate is provided. The distribution plate may include a first distribution face and a second distribution face and a plurality of ports extending betw...
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WO/2014/017685A1 |
Disclosed is a hydraulic system capable of reducing the discharge flow rate of a hydraulic pump during the operation of a relief valve in the hydraulic system having the relief valve. The hydraulic system for a construction machine accor...
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WO/2014/014146A1 |
Disclosed is a flow control valve for construction machinery, the flow control valve being adapted to reduce pressure loss due to flow on return to a hydraulic tank during the boom-down operation of a large-scale excavator. The flow cont...
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WO/2014/014131A1 |
Disclosed is a method for controlling a hydraulic system for minimizing a loss of pressure by expanding the open area of a joining spool if a work device such as a boom or the like operates autonomously. The present invention provides a ...
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