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WO/2018/166984A1 |
The disclosure concerns a method for controlling the pressure in the chambers of a hydraulic cylinder (1) having a meter-out chamber (2) and a meter-in chamber (3). A meter-out valve (7) is connected to the meter-out chamber (2) for regu...
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WO/2018/162243A1 |
The invention relates to a method for activating a hydraulic actuator drive comprising an actuator, the position of which is adjusted by at least one electrohydraulic proportional valve, which has at least one electrical input and at lea...
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WO/2018/153524A1 |
The invention refers to an arrangement and to a method to detect an oil leakage (LKG) between a first section (S1) of a hydraulic cylinder (HC) and a second section (S2) of the hydraulic cylinder (HC). A movable piston (MP) is arranged b...
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WO/2018/131118A1 |
This fan drive system is provided with: a hydraulic pump; a hydraulic motor that rotates a fan on the basis of a hydraulic oil supplied from the hydraulic pump; a data acquisition unit that acquires the actual rotation speed of the fan; ...
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WO/2018/122111A1 |
The invention relates to an accumulator comprising: - a main cylindrical housing with a closed first axial end; - a piston arranged in the main cylindrical housing and sealed to the inner surface of the main cylindrical housing, which pi...
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WO/2018/097029A1 |
To ensure minimal hydraulic actuator operation even when one motor is inoperable while being able to conserve energy and reduce the size of a hydraulic system, this construction machinery comprises a first hydraulic drive device that is ...
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WO/2018/075241A1 |
Methods and apparatus of stabilizing a valve positioner when testing a solenoid valve are disclosed. An example apparatus includes a solenoid valve (202) and a valve positioner (106) fluidly and communicatively coupled to the solenoid va...
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WO/2018/074952A1 |
The disclosure relates to an electro-hydraulic control system (1) for directing fluid to at least one hydraulic actuator (10), the system (1) comprising at least one electronic controller (3, 4); first and second pilot valves (5, 6) bein...
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WO/2018/064148A1 |
A selector control that is manually operable by a user for activating or deactivating a primary control or a secondary control. The selector control may include a first state for activating the primary control and deactivating the second...
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WO/2018/041284A1 |
The invention relates to a pneumatic control system for a working cylinder, which pneumatic control system enables resistance-free manual motion of the device driven by the working cylinder in the event of a failure or switch-off of the ...
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WO/2018/034534A1 |
The present invention relates to a check valve for discharging air which selectively discharges air and a hydraulic fluid, and to a hydraulic actuator for a power plant, having the check valve. The check valve for discharging air accordi...
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WO/2018/034536A1 |
The present invention relates to a valve assembly for discharging air which selectively discharges air and a hydraulic fluid, and to a hydraulic actuator for a power plant, having the valve assembly. The valve assembly for discharging ai...
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WO/2018/015022A1 |
The invention relates to a hydraulic flight control actuator, comprising a piston-cylinder device, which has a piston and a cylinder, and comprising a double seal device, which has at least one primary seal (1) and at least one piston ri...
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WO/2018/011975A1 |
An electro hydrostatic actuator system (1) comprising: a hydraulic actuator (2); a plurality of hydraulic supply sources (31, 32); and a hydraulic circuit (33). The hydraulic supply sources respectively have hydraulic pumps (321, 322), e...
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WO/2018/012264A1 |
Provided is construction machinery that can detect in real time during work that an excess flow control valve is stuck open without decreasing the speed of work. The construction machinery is provided with: an excess flow control valve c...
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WO/2018/011560A1 |
A liquid-ingress control device, comprising a casing having an interior and an exterior, and optionally a liquid-activated trigger positioned in the casing interior; the casing comprising an exterior liquid entry control surface defined ...
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WO/2017/199607A1 |
This liquid leakage detection device comprises: a sensor section (12) for detecting liquid present between a plurality of seals (8, 9) which are axially arranged on the inner periphery of a shaft support member (7) in which a shaft (2) i...
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WO/2017/195716A1 |
Provided is a crane 1 constituting a hydraulic system H that includes: actuators 25, 35, 45; direction switching valves 20, 30, 40 that switch the flow direction of an operating fluid for actuating the actuators 25, 35, 45; and proportio...
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WO/2017/186712A1 |
The invention relates to a hydraulic spindle comprising a cylinder which has a piston. The piston separates a first cylinder chamber from a second cylinder chamber. A pressure medium can be supplied to the piston in the retracting direct...
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WO/2017/187934A1 |
A monitoring device (10) has a first pressure sensor (50) that detects a first pressure value (P1) of a pressurized fluid in a first pipe (26), a second pressure sensor (52) that detects a second pressure value (P2) of a pressurized flui...
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WO/2017/178347A1 |
An electrohydraulic control circuit (1) for actuating a hydraulically activated drive assembly (2), by means of which a mast segment of a manipulator, in particular of a large-scale manipulator for truck-mounted concrete pumps, can be ad...
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WO/2017/175820A1 |
Provided is an emergency operation valve capable of alternatively switching between an open state and a closed state, wherein the emergency operation valve is configured so as to be provided with a valve box having a hollow valve chamber...
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WO/2017/175849A1 |
An air cylinder 50 is provided with a cylindrical cylinder 52 and a piston 51 that is moved by the pressure of a fluid fed to chambers 56, 57 disposed within the cylinder 52. A monitoring device 1 is provided with a heat flux sensor 10 a...
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WO/2017/175862A1 |
Provided is a crane that is capable of protecting a hydraulic cylinder by suppressing operation of the hydraulic cylinder when the hydraulic cylinder is in poor connection with a hydraulic circuit. A crane (1) provided with a derricking ...
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WO/2017/176568A1 |
The present disclosure relates to an electronic control system for pneumatic grips, using proportional air pressure control, as employed in the field of materials testing. The disclosed embodiments allow for variable gripping pressure th...
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WO/2017/171022A1 |
Provided is a failure detection device which is capable of automatically detecting failure of a hydraulic pilot circuit following a normal lever operation. The failure detection device is for a pilot circuit provided with: a pilot pressu...
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WO/2017/171021A1 |
Provided are: a hydraulic system which exhibits excellent safety, and which is capable of slowly driving an actuator during emergency operation; and an emergency operation method. This hydraulic system is provided with: a hydraulic pump;...
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WO/2017/167435A1 |
A control device is disclosed for at least one hydraulic working section (A, B), which can be connected to a pressure supply source (P) and a return flow (T) via a hydraulic supply circuit and a control valve (34) supplied with a pilot p...
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WO/2017/164371A1 |
Provided is a hydraulic system with which an operator can safely perform work during an emergency operation even in the event that an electromagnetic proportional valve has failed. This hydraulic system is provided with a hydraulic pump,...
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WO/2017/164370A1 |
Provided is a failure diagnosis device with which failure of an unloading circuit of a hydraulic system can be reliably discovered. The unloading circuit is provided with a pump oil passage that connects a hydraulic pump and a directiona...
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WO/2017/130404A1 |
The purpose of the present invention is to provide a spool valve device for a pneumatic cylinder, which is capable of adjusting the dead band during switching back and forth between an extension direction operation and retraction directi...
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WO/2017/129293A1 |
The invention relates to a hydraulic cylinder unit (1) having a hydraulic cylinder (2), a piston (3) which can be moved in the hydraulic cylinder (2), and a servo valve (7). The piston (3) separates working volumes (5A, 5B) of the hydrau...
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WO/2017/125247A1 |
The invention relates to a safety controller, which serves the purpose of the quick pressure relief of a hydraulic load, comprising at least one pair of control valves, which can be connected to each other in a fluid-conducting manner, c...
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WO/2017/125121A1 |
A circuit arrangement for at least one fluidic actuator (11) having a piston-rod unit (14) guided so as to be longitudinally movable in a housing (8), which unit divides the housing (8) into two working spaces (16, 18), which are each as...
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WO/2017/110177A1 |
According to the present invention, a back pressure control valve (40) is provided with: a switching valve (50) which opens/closes a connection path (13); and an emergency operation valve (60) which is provided to a branched path (14) an...
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WO/2017/110167A1 |
The present invention can achieve energy conservation by carrying out recycle control even when an abnormality occurs in a pressure sensor of a hydraulic actuator. The present invention is provided with: a hydraulic pump (41b) that suppl...
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WO/2017/112720A1 |
Apparatus for independently controlling the seating force in a rotary valve are described herein. An example apparatus includes a rotary valve having a flow control member and a dual-acting actuator operatively coupled to the rotary valv...
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WO/2017/091892A1 |
An apparatus for cutting involves a support configured to stably support the apparatus on a surface, an articulated boom rotatably mounted on the support proximate a first end of the boom, and a hydraulically operated end effector mounte...
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WO/2017/079792A1 |
A piston and cylinder system (10), the cylinder (12) including a closed end (14) and an open end (16). The piston (18) is movable in an axial direction within the cylinder (12) between a fully extended position and a fully retracted posi...
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WO/2017/077343A1 |
A valve system comprising: a first channel and a second channel in a parallel arrangement, each channel having an upstream end and a downstream end; an inlet valve arrangement connected to the upstream ends of the channels and configured...
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WO/2017/077786A1 |
This liquid leak detection device is configured by being provided with: a sliding member (S), which has an elastic section (10) and which slides on the outer circumference of a rod (2) that is capable of moving in the axial direction wit...
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WO/2017/071584A1 |
An axle-locking hydraulic system of a two-way driving shuttle vehicle, comprising an axle-locking fluid tank (11), an axle-locking circuit, an axle-locking solenoid reversing valve (21), and a burst pipe emergency apparatus. The axle-loc...
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WO/2017/064398A1 |
The invention relates to a control system which comprises: a plurality of flow valves (2) on channels (54) of reaction fluid, which are i) in a closed position or ii) in an open position; a plurality of control pipes (4) connected to a s...
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WO/2017/065249A1 |
First, the pressure of the oil in an oil passage in a control valve device is measured. Then, on the basis of the measurement results obtained, amplitude and period of pressure fluctuations are detected and a diagnosis is made whether th...
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WO/2017/021080A1 |
The invention relates to a hydraulic drive (1) for executing a linear movement, having a motor (2), a pump (3), a lifting cylinder (4) that has a linearly movable piston (5) and a cylinder housing (6) having at least one first connection...
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WO/2017/009296A1 |
A hydraulic circuit comprising: a hydraulic input A, a hydraulic output B, a first directional control valve 12 arranged between the hydraulic input and hydraulic output, and a second directional control valve arranged between the hydrau...
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WO/2016/210397A1 |
An electro-pneumatic controller adapted to use a non-inert fluid as a control fluid includes a base portion and a cap portion removeably secured to the base portion. A non-intrinsically-safe process may be disposed within an interior of ...
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WO/2016/207741A1 |
The invention relates to a safe hydraulic drive system and a process for operating such a drive system, moving a piston rod (23) of at least one cylinder (2), comprising at least one first cylinder chamber (21) and a second, separate cyl...
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WO/2016/199654A1 |
A hydraulic drive system (100A) of an industrial machine is provided with a boom cylinder (4) (first hydraulic actuator), an arm cylinder (8) (second hydraulic actuator), a hydraulic pump device (51), a control valve (5), a regenerator (...
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WO/2016/199184A1 |
A compound electromagnetic valve (2) has multiple electromagnetic valves (24a and 24b), and an output port (22). The output port (22) supplies air to an air supply destination only when all of the multiple electromagnetic valves (24a and...
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