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Patent Searching and Data


Matches 451 - 500 out of 8,711

Document Document Title
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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 ...  
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...  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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 ...  
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...  
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...  
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...  
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...  
WO/2014/009011A3
The invention relates to a wind turbine with at least one pitch adjustment system for adjusting the pitch of at least one rotor blade of the wind turbine. The pitch adjustment system comprises at least one electrohydraulic drive which ha...  
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...  
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...  
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...  
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) ...  
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...  
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,...  
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...  
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...  
WO/2013/192281A3
A variable flow valve with position feedback is disclosed. The variable flow valve includes a housing having an inlet port and a discharge port and one or more control ports, and also includes a piston connected to a primary valve to ope...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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 ...  

Matches 451 - 500 out of 8,711