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WO/2012/053672 |
Disclosed is a hydraulic system for a construction machine, which makes it possible to adjust the geometric position of a working device comprising a boom and an arm by means of a single manipulation lever, thereby enabling a leveling/fl...
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WO/2012/034165 |
An ultra high pressure pump comprising a servo motor coupled to a piston having a head arranged within a cylinder to define a pumping chamber, whereby the servo motor rotation causes reciprocal displacement of the piston to pressurise fl...
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WO/2012/021184 |
A unitary, closed center, electro-hydraulic, rack and pinion power steering system 10 is disclosed. The system 10 includes a pinion housing 18 carrying an input pinion 12 and an input rack 20. A main housing 50 carries an electric motor ...
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WO/2012/015087 |
Provided are a swirl flow control system for construction equipment and a method of controlling the same. The swirl flow control system includes: an engine; a plurality of actuators and rotation motors for a working device including a bo...
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WO/2012/013373 |
The invention relates to a method for operating a hydraulic driving device (10) with a hydraulic cylinder-piston unit (12) having a working piston (16) which is movable along a working direction (14) between an upper dead centre and a lo...
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WO/2012/002586 |
Disclosed is a flow control system for a hydraulic pump of construction machinery, which is capable of variably controlling the discharge flow from a hydraulic pump in accordance with load pressure that occurs at a hydraulic actuator of ...
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WO/2011/148523 |
An operation time period setting device is applied to a fluid pressure actuator driving system (10) comprising: an actuator body (13) provided with a piston (14); supply/discharge flow paths (17a, 17b); and electrically operated flow rat...
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WO/2011/137199 |
A pump control assembly includes a fluid pump assembly (12) having a fluid pump (20) and a load sensing valve. The fluid pump includes a fluid inlet (24) and a fluid outlet (26). The fluid pump includes a variable displacement mechanism ...
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WO/2011/115902 |
A fluid motor (2,60) and a control system that includes an electronic controller (30) and a mechanical servo to position a fluid motor (38). The electronic controller is combined with a non - electronic self storing position feedback dev...
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WO/2011/114974 |
Disclosed is a control device for a work machine on a construction vehicle such that a bucket cylinder is stopped at a target position, with high accuracy achieved in a bucket cylinder length, and with shock held down to a low level. A b...
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WO/2011/095351 |
The invention relates to a fluid-actuated actuating drive on a valve comprising a base unit (2) having an electro-fluidic signal converter and a fluidic controller and at least one linear actuator (4) that can be actuated using the fluid...
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WO/2011/056302 |
An electro-hydraulic control system for pump (22) control is disclosed. The hydraulic actuator (50) is configured to control the inclination of a swashplate. The position of the hydraulic actuator (50) is controlled by controlling the fl...
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WO/2011/056302 |
An electro-hydraulic control system for pump (22) control is disclosed. The hydraulic actuator (50) is configured to control the inclination of a swashplate. The position of the hydraulic actuator (50) is controlled by controlling the fl...
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WO/2010/097133 |
The invention relates to a storage compartment having a cover (102) for closing a removal opening and having a device (112) for damping an opening motion of the cover, wherein the device comprises an elastic element (118) that is deforme...
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WO/2010/084043 |
The invention relates to a hydraulic drive device, comprising a piston which is guided displaceably in a cylinder chamber along a working axis and adjoins a working pressure chamber that can be pressurized by hydraulic fluid, and compris...
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WO/2010/082452 |
The inner pressure of an actuator is measured by a pressure measuring means (9). The amount of displacement of a movable mechanism is measured. The target value and the measured value of displacement are input, and a positional error i...
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WO/2010/034804 |
A system for adjusting the position of a control member of a power plant has a hydraulic fluid operated hydraulic actuator (H) provided with a displaceable member (5) connected to the control member (2), and having operating parameters; ...
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WO/2010/032743 |
Disclosed is a feedback control device for stroke of an actuator driven by a working fluid, that can compensate the aging or the like of a flow control valve for controlling the working fluid, and executes a precise control of a stroke b...
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WO/2010/012866 |
The invention relates to a rotating apparatus, which comprises a hydraulic or pneumatic actuator (4, 5) movable back and forth, a control valve with an inlet channel connected to pressure, a discharge channel connected to smaller pressur...
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WO/2009/146148 |
A locking mechanism includes a hydraulic actuator component and an electronic actuator component that are arranged coaxially, each of the actuator components being arranged to control a locking member that retains a movable component. In...
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WO/2009/146148 |
A locking mechanism includes a hydraulic actuator component and an electronic actuator component that are arranged coaxially, each of the actuator components being arranged to control a locking member that retains a movable component. In...
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WO/2009/133956 |
The objective is to perform good control with reduced overshoot when controlling an actuator such as an air cylinder. Therefore, the present invention, when the cylinder chamber interior has first and second chambers that are partitioned...
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WO/2009/108830 |
This disclosure relates to a hydraulic system and method that converts the kinetic energy generated by the operation of a swing motor (11) into hydraulic potential energy and reuses the hydraulic potential energy for acceleration of the ...
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WO/2009/091767 |
A servo system includes pressurized fluid, and one or more fluid control devices (FCD) such as a valve or actuator, with at least one FCD having an element with a variable property that varies in response to a stimulus. The FCD controls ...
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WO/2009/091767 |
A servo system includes pressurized fluid, and one or more fluid control devices (FCD) such as a valve or actuator, with at least one FCD having an element with a variable property that varies in response to a stimulus. The FCD controls ...
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WO/2009/062649 |
Disclosed is an electrohydraulic booster comprising an electromechanical transducer (2) and a hydromechanical power stage (10) which is connected to a pressurized medium supply (13) and encompasses a cylinder (8) and a piston (9) that ca...
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WO/2009/062650 |
Disclosed is a CNC punching machine comprising a machine frame, a workpiece holder that is arranged thereon, a two-part punching tool that encompasses a patrix (1) and a matrix (2), a drive unit (6) that acts on the patrix, and a numeric...
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WO/2009/062649 |
Disclosed is an electrohydraulic booster comprising an electromechanical transducer (2) and a hydromechanical power stage (10) which is connected to a pressurized medium supply (13) and encompasses a cylinder (8) and a piston (9) that ca...
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WO/2009/053145 |
The invention relates to a regulation structure (13) for regulating a hydraulic cylinder unit (1), comprising an internal regulator (15) and an external regulator (16). The external regulator is supplied with a set force (F*) or a set po...
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WO/2009/039856 |
Valve actuator system and a system for operation of valves, which valve comprises a valve housing, which valve housing comprises at least one inlet and at least one outlet, which valve housing further comprises a valve closing element, w...
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WO/2009/035509 |
An actuator control system (26) is disclosed. The actuator control system may have a pump (30) and at least one actuator (36A). The actuator control system may further have an actuator valve (46) configured to control the at least one ac...
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WO/2009/008384 |
A servo-valve comprises a spool having a first valve element and a second valve element, and a sleeve housing the spool movably in the axial direction and having an air supply port for supplying air between the first valve element and th...
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WO/2008/148662 |
The invention relates to a power boosting device (10) comprising an element (20) on which a manual shifting force acts that is to be boosted, at least one valve piston (40, 48) that is arranged on the element (20), and at least one means...
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WO/2008/128641 |
A torsional vibration damper comprises a primary side (12) and a secondary side (14) which may rotate about a rotational axis (A) relative to the primary side (12) against the action of a damper arrangement, wherein the damper arrangemen...
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WO/2008/125132 |
A pneumatic actuator system (200) is provided according to the invention. The system (200) comprises a pneumatic actuator (100) including an actuator component (108), with the pneumatic actuator (100) being configured to include a first ...
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WO/2008/110882 |
The fluid distributor apparatus (12) comprises a body (30) having distribution ports (35, 37, 39, 62, 63); a spool (41) adapted for controlling said distribution ports (35, 37, 39, 62, 63) and mounted sliding in a first sliding seat (31)...
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WO/2008/084367 |
An actuator position control system (11) comprises an actuator (21); at least one actuator position sensor mounted to the actuator; a flow control valve (17) having at least one main stage spool, at least one spool position sensor (33) t...
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WO/2008/084367 |
An actuator position control system (11) comprises an actuator (21); at least one actuator position sensor mounted to the actuator; a flow control valve (17) having at least one main stage spool, at least one spool position sensor (33) t...
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WO/2008/081803 |
An EGR valve device (1) having a valve housing (2) through the inside of which exhaust gas passes, a poppet valve (3) as a valve body received in the valve housing (2), and a hydraulic servo drive device (4) for opening and closing the p...
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WO/2008/042861 |
A pneumatic controller for controlling a process advantageously reduces fluid consumption by providing a proportional adjustment to a feedback signal. The pneumatic controller comprises a pneumatic control stage, a process pressure detec...
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WO/2008/042861 |
A pneumatic controller for controlling a process advantageously reduces fluid consumption by providing a proportional adjustment to a feedback signal. The pneumatic controller comprises a pneumatic control stage, a process pressure detec...
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WO/2007/134440 |
Uattended pneumatic device to activate a tool such as a clipper operated by the displacement of an operator in opposite operating directions. The device is made of a rigid body – such as a pole - fitted with a tool at one end and a por...
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WO/2007/114725 |
A transducer for an automatic control device comprises at least one micro-supercharger (1), namely a microprocessor or micro-pump, whose electric drive is used for connecting to the electric output of a secondary unit of an automatic con...
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WO/2007/101754 |
The invention relates to a shifting device (11, 40) with a power assistance mechanism (10) for a vehicle transmission (30) comprising means for selecting and shifting gears of said transmission (30) and a control rod (20) of the power as...
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WO/2007/097661 |
The electrohydraulic servo drive comprises a hydraulic motor, a pump, a reduction valve, a two-cascade hydraulic amplifier with a controllable throttle in the first cascade and a distributor in the second cascade, a power limiter, a pres...
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WO/2007/092476 |
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/2007/092476 |
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/2007/029009 |
An electro-hydraulic system comprising an electromagnetic actuator (1) and a hydraulic (5) actuator relatively arranged such that the movement of the hydraulic actuator (5) is controlled by the movement of the electromagnetic actuator (1...
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WO/2007/020126 |
The invention relates to a control method for a mechanical-hydraulic system having a degree of freedom per hydraulic actuator which is embodied as a control path, and a measuring sensor (6) which is used to measure the pressure ph of a h...
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WO/2007/000052 |
A self-actuated cylinder comprising a cylinder housing comprising electro- magnetic force generating means to generate electro-magnetic forces, and a piston within the cylinder housing, wherein the electro-magnetic forces act directly on...
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