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WO/2010/117995A1 |
A fluid circuit (10) includes a tank (14) for holding fluid ( 15), a hydraulic device (24) having a predetermined load configuration, and a pump (12) for delivering the fluid (15) under pressure to the hydraulic device (24). Sensors (18A...
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WO/2010/086271A1 |
In order to increase the availability of the actuator device according to the invention, there is a valve assembly (18) between the supply air inlet (9) and the magnetic valve (6) that is activated by a position threshold sensor (19) tha...
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WO/2010/078887A1 |
The invention relates to a hydraulic control circuit having a cylinder (2) having a piston (19) dividing the cylinder into a first and a second pressure chamber (21, 22). The piston can be controlled by means of an electrically actuated ...
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WO/2010/071344A1 |
The present invention provides a flow control apparatus for a hydraulic pump of a construction machine, comprising: pressure sensor (80) for outputting pressure signals for a variety of control signal input values of the construction mac...
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WO/2010/049567A1 |
Applicable in installations with two torque arms (4) connected to a first (2) and a second part (3) and arranged above two actuators (1), also connected to the first (2) and second part (3) to cause the relative movement between the part...
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WO/2010/031389A1 |
A hydraulic actuating device for a convertible top unit (2) of a vehicle comprises a plurality of hydraulically movable convertible top elements (3, 4, 5), a pump (8) which is connected to the working chambers of at least one first and s...
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WO/2010/020471A1 |
The invention relates to a method for operating a hydraulic or pneumatic control device of a semi-automatic transmission, wherein the control device comprises actuators (13, 14) having actuating cylinders (15, 16), wherein pressure chamb...
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WO/2009/144565A1 |
A bleed valve assembly (20) includes a control assembly (22) having a fluid inlet (36a) and a fluid outlet (36b). The control assembly defines a fluid passageway (38) in fluid communication with the fluid inlet and the fluid outlet. An e...
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WO/2009/141131A1 |
A control device for a quick-acting gate valve (2) of a steam turbine, comprising a relief valve (4) for reducing a hydraulic pressure that opens the quick-acting gate valve and a relief valve / control valve arrangement (6) having at le...
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WO/2009/131811A1 |
A method for controlling an actuator, such as the type used to drive valves, vanes, and other variable position devices. In one exemplary embodiment, a method may improve the accuracy of actuator feedback by periodically or dynamically r...
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WO/2009/127349A1 |
The invention relates to a control arrangement with a pilot aggregate (6) for controlling a control valve (2) comprising a first and a second control chamber (36, 38). The first control chamber (36) is provided for adjusting the control ...
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WO/2009/114049A1 |
A hydraulic actuator is configured to provide redundant boost control to an aircraft within approximately the same space required by a single hydraulic cylinder. The hydraulic actuator includes a housing and a piston assembly disposed wi...
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WO/2009/100734A1 |
The invention relates to a soft start device for compressed air systems having a primary inlet (P1) that can have compressed air fed thereto under primary pressure, wherein the primary inlet (P1) is connected to a secondary outlet (P2) t...
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WO/2009/070358A1 |
A servovalve includes a single motor which actuates separate valve members of separate servovalve assemblies. Each of the valve members controls the flow of hydraulic fluid from separate hydraulic fluid sources. In order to provide each ...
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WO/2009/056733A1 |
A hydraulic system for an aircraft in which at least one circuit comprises two hydraulic pumps (10), at least one of which is driven by an engine (2) liable to explode with the possibility of damaging the hydraulic lines near the pump, i...
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WO/2009/046184A1 |
A double valve having inlet (13), outlet (15), and exhaust ports (17) maintains an outlet pressure below one percent of inlet pressure during a faulted state while maintaining a relatively small exhaust for reduced overall valve size. Cr...
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WO/2009/010077A1 |
A valve (1a) is proposed, comprising a valve member (17), which can assume a neutral position in which it simultaneously connects a first fluid connection (26) to two second fluid connections (32a, 32b). From each of the second fluid con...
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WO2008116313A9 |
A liquid distributor for distributing a liquid in a pressurized system, the pressurized system including an inlet line and a first outlet line for respectively supplying a pressurized fluid to the liquid distributor and receiving the pre...
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WO/2008/149541A1 |
A fluid pressure unit has a pressure sensor (17) for detecting the discharge pressure of a hydraulic pump (11). An abnormality detection section (23) of a controller (21) detects dry operation of the hydraulic pump (11) when the discharg...
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WO/2008/105501A1 |
A safety device for a hydraulic working machine having control valves (22-24)for controlling flows of pressurized oil from a hydraulic pressure source (21) to hydraulic actuators (15-17), electric lever devices (51-53) for outputting ope...
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WO/2008/105502A1 |
A safety device for a hydraulic working machine has control valves (22-24) for controlling the flow of pressurized oil from a hydraulic pressure source (21) to hydraulic actuators (15-17), electric lever devices (51-53) for outputting, i...
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WO/2008/095498A1 |
A valve assembly (2) forming a bridge circuit and a hydraulic actuator comprising at least one valve assembly (2) are disclosed. The valve assembly (2) is fluidly connectable between a fluid source (3) and a fluid drain (4). The valve as...
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WO/2008/095499A1 |
A hydraulic actuator for a hydraulic servomotor (4) is disclosed. The hydraulic servomotor (4) is of a kind having at least one defined end position, and has a first chamber (5) and a second chamber (6) associated therewith. The actuator...
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WO/2008/095497A1 |
A hydraulic actuator for a hydraulic servomotor (4) is disclosed. The hydraulic servomotor (4) has a first chamber (5) and a second chamber (6) associated therewith. The hydraulic actuator is connected to a fluid source (2) and a fluid d...
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WO/2008/042308A2 |
A fail-safe system for a hybrid vehicle employing an over-center variable-displacement hydraulic motor includes an actuator configured to stroke the motor to a zero angle if each of two control ports is supplied with fluid at an equal pr...
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WO/2008/021963A2 |
The hydraulic system safety shut off valve is a safety valve for use immediately downstream from a hydraulic pressure power supply line and before the operational control valves and subsystems. It includes a velocity fuse having an inlet...
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WO/2008/012293A1 |
There is described a hydraulic connection assembly with a pressure discharge control, which is positionable between an onboard hydraulic circuit of an engineering vehicle and a removable hydraulic equipment. The hydraulic assembly compri...
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WO/2007/129982A1 |
The present invention relates to a valve block (1) disposed adjacent a tool attachment of a working machine, where the tool attachment is adapted for connection to different types of hydraulically manoeuvred tools or implements with the ...
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WO/2007/096099A1 |
The invention relates to a control device for controlling a hydraulic consumer, said device being equipped with a distributing valve comprising a control pressure chamber and a control slide that can be displaced against the force of a s...
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WO/2007/092476A2 |
Systems and processes may provide improved performance for a pneumatic positioner during a safety override. In certain implementations, a system and process may include may include the ability to receive an input control signal, power co...
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WO/2007/085784A1 |
Interruption in supervisory position control signals can cause problems with respect to actuators which upon loss of such control signals for the actuator will generally slew to a fixed idle position. In such circumstances a machine such...
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WO/2007/069955A1 |
A method for sensing leakage in a clutch cylinder (110) system in a vehicle comprising an automated manual transmission, wherein the clutch cylinder system comprises a clutch cylinder (110) provided with a reciprocable piston (115), whos...
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WO/2007/051254A1 |
An interlocking isolation valve assembly is described. The valve assembly is adapted to be connected to a hydraulic circuit, and it includes: a first isolation valve and a second isolation valve and an interlock means wherein the second ...
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WO/2007/045201A1 |
The invention relates to a servo valve consisting of a housing which comprises a pressure valve piston movable therein, a valve spring interacting with said piston, terminals for lines comprising a main and slave cylinders and a pump whi...
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WO/2007/028863A1 |
In a method for controlling a valve system controlling an actuator, the first direction of motion (X) of the actuator (1) is controlled solely by means of the first and the second valve series (DFCU P→A, DFCU B→T); or, its second dir...
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WO/2007/016426A1 |
An electro-hydraulic servovalve (EHSV) (10) that includes a nozzle (16), a motor (12) operably connected to the nozzle (16) for controlling the position of the nozzle (16) based on current provided to the motor (12), a spool (18) having ...
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WO/2006/134239A1 |
The invention relates to a device for controlling the steering of a commercial vehicle comprising: two front wheels (126, 127) that can be oriented according to a first turning angle by means of at least one first actuator (120); two rea...
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WO/2006/118050A1 |
A hydraulic excavator having a hydraulic cutout valve (41) for blocking pressurized oil to a PPC valve, a lock switch for operating the hydraulic cutout valve (41), and a control device (43) for controlling switching of the hydraulic cut...
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WO/2006/094970A2 |
The invention relates to a hydraulic actuation device, a method for actuating a clasp or a cover of a cabriolet, a jamming protection device, in addition to a method for protecting against jamming for convertible hoods. A volume flow is ...
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WO/2006/083215A1 |
The invention refers to a method for cleaning a hydraulic valve (20-25) in that binding, such as by adhering dirt, of a valve is detected, that a control member (19) is activated for valve cleaning, that a predetermined control signal is...
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WO/2006/011627A1 |
A fluid sequence apparatus having an actuator (2) operated by operation fluid, an actuator control mechanism (3) for controlling the movement of the actuator (2) by a pilot pressure of the operation fluid, and an operation preparation co...
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WO/2006/006950A1 |
Two or more flow control valves (140a, 140b) may be used to provide redundant flow control for a hydraulic actuator (111) or servoactuator. The flow control valves include a sleeve (142a, 142b) control spool (146a, 146b). Under normal op...
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WO/2005/113407A1 |
The invention relates to a lifter, in particular a lifter for baggage. The lifter is provided with a safety stop that includes a pivotable stop element that pivots to a locking position when acceleration exceeds a limit value.
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WO/2005/113999A2 |
A hydraulic drive system for an access apparatus and a method of access is presented. The hydraulic drive system may include a hydraulic power unit, a hydraulic cylinder and a subsystem for limiting motion of the access system according ...
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WO/2005/097405A1 |
[PROBLEMS] A safety device for a machine tool, which alone functions as both as means for balancing the weight of a rising/lowering member and as cushioning means for preventing falling and sudden rise of the rising/lowering member. [MEA...
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WO/2005/090797A1 |
A valve means controls flow from a fluid supply (2) to a pressurised seal chamber (3) at the pump outlet of a fluid storage tank (6), in order to accommodate leaks from the seal chamber (3). The valve means comprises metering valve (8) a...
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WO/2005/078318A1 |
The invention concerns a shifting unit (1) for a motor vehicle gearbox, said switching unit comprising valves, which are connected between them by a pressure supply conduit (58) and by a pressure discharge conduit (60), associated with a...
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WO/2005/077731A1 |
The invention concerns a vehicle steering system for motor vehicles, comprising a steering implement, which can be operated by the driver, and comprising an actuating unit, which is assigned to the steered vehicle wheels, is actively con...
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WO/2005/069853A2 |
The redundant valve system 10 of the preferred embodiment includes a first valve unit 12 and a second valve unit 14. The redundant valve system 10 is preferably used to connect a source 16 to a destination 18 and to connect the destinati...
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WO/2005/054629A1 |
The invention relates to a hydraulic circuit used for longwall face removal, comprising a plurality of supports (shields). In said circuit, the hydraulically actuated power transmitters (cylinder/plunger units (4)) and their associated h...
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