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WO/2005/073565A1 |
An actuator(100) includes a piston (104) within a cylinder (102), the cylinder having a first fluid port (112) in communication with an open side of the piston, and a second fluid port (114) in communication with a shaft side of the pist...
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WO/2005/061905A1 |
A spool valve includes a first valve port (162, 174) coupled to a fluid source at a first pressure range, a second valve port (164) coupled to a fluid source at a second, lower, pressure range, and first and second output ports (168, 170...
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WO/2005/028166A1 |
An internal pressure of a fluid pressure drive actuator is measured by pressure measuring means (9), the amount of displacement of a movable mechanism is measured, a target value and a measurement value of displacement are inputted and a...
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WO/2005/018972A1 |
The invention relates to a hydraulic drive system used for the covers of vehicle openings, in particular for vehicle roofs with a construction that can be opened. In said system, the actuator (1) that is designed to displace the cover is...
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WO/2004/090340A1 |
A position control system is used for controlling a fluid operated cylinder (12) having at least one fluid chamber (14) defined by a piston (18) located within a housing (20) for movement between first and second end limits of travel (22...
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WO/2004/085855A1 |
A hydraulic device capable of performing stable pressing. The device has a hydraulic pump (1) that is driven by an electric motor (6) and can be rotated in both directions. In the device, both ports (14, 16) of a hydraulic cylinder (12) ...
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WO/2004/068932A1 |
The invention relates to an assembly and a method for controlling the front lifting gear of an agricultural utility vehicle and to the use of the same in agricultural areas. The aim of the invention is to provide an assembly and a method...
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WO/2004/065798A1 |
A position control system is used for controlling a fluid operated cylinder (12) having at least one fluid chamber (14) defined by a piston (18) located within a housing (20) for movement between first and second end limits of travel (22...
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WO/2004/066043A2 |
The invention solves the problem of pneumatic locking the actuator piston rod in a selected intermediate position during ventilation. The control unit is characterized by the features that it is constituted by a four-way controlling dist...
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WO/2004/044436A1 |
A method and apparatus for an electro-hydraulic actuator (1) having mechanical feedback provide closed loop control with a high degree of accuracy. The electro-hydraulic actuator (1) includes a current versus load generator (10), a singl...
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WO/2004/031593A1 |
The invention relates to a regulating device for a hydraulic system, enabling a valve (3) which controls a consumer to be controlled or regulated, wherein a bus (1) and bus interfaces (4) are arranged between a job calculator (2) and the...
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WO/2004/025127A1 |
The invention relates to a hydraulic device comprising a first hydraulic cylinder (2) provided with a first piston (11) and a second hydraulic cylinder (3) provided with a second piston (12). The pistons are coupled together in order to ...
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WO/2004/011812A2 |
An apparatus and method for controlling an actuator system having an electrical actuator in hydraulic communication with a hydraulic actuator are described. The apparatus includes a controller module in communication with a source of ele...
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WO/2004/007973A1 |
An electrohydraulic actuation system in which the quantity of fluid being fed to hydraulic actuators under higher load pressure among those of a plurality of electrohydraulic actuators can be prevented from becoming deficient. In the ele...
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WO/2004/005728A1 |
An electro hydraulic servo valve assembly has a valve housing and a spool rotatably fitted to the inside of the housing. A number of ports are off-settedly provided along the length of the valve housing A plurality of orifices are provid...
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WO/2003/100385A1 |
Apparatus, and an accompanying method for use therein, that utilizes first (working) and second (stopping) servo-controlled hydraulic pistons (310, 313; 401, 413) wherein the stopping piston acts as a controlled mechanical stop for the w...
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WO/2003/096522A1 |
Construction machinery, comprising an electric motor (6) for driving a rotating system, an operating body for instructing the operation of the electric motor (6), and a controller (9) for controlling the electric motor (6) according to t...
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WO/2003/093681A1 |
Method and apparatus for performing diagnostics in a pneumatic control loop for a control valve. Pressure and displacement (68, 84) sensors normally provided with a positioner (14) are used to detect operating parameters of the control l...
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WO/2003/086942A2 |
A vehicle lift (2) control maintains multiple points (4, 6) of a lift system within the same horizontal plane during vertical movement of the lift engagement structure by synchronizing the movement thereof. A vertical trajectory is compa...
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WO/2003/083314A1 |
The invention is related to mechanical engineering particularly to the mechanisms intended for remote control of the gas and petroleum products pipelines stop and control devices actuators. The inventive pneumatic drive comprising the se...
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WO/2003/066425A1 |
A method for offshore load transfer and a floater for use in such load transfer are described. A hydraulic device for use in a horizontal positioning system for keeping the floater in position is also described. During the mounting and d...
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WO/2003/058073A1 |
A valve includes a housing (58) with an elongated bore having a longitudinal axis and a spool (80) reciprocatingly mounted within the bore for relative movement along the bore parallelto the axis. The housing (58) has a housing passagewa...
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WO/2003/058095A2 |
The invention relates to an actuator cylinder, which is intended to be operated using a control valve (10) controlled by an operating lever (11). The actuator cylinder includes a cylinder barrel (13), a piston (14), and a rod (15), which...
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WO/2003/033899A1 |
A multi-lobed, low friction vane, thrust vector controller is disclosed. Low friction vanes are independently movable into and out of the thrust of the exhaust of a jet engine. All vanes may be used together to adjust exhaust surface are...
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WO/2003/029659A2 |
The invention relates to a main piston servo control system which is fitted with a fault control system. The inventive system comprises two servo-valves (1, 2) and a piston (4) which is mechanically connected to a position transducer (5)...
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WO/2003/020500A1 |
The invention relates to a control device comprising a first and a second tool (23, 24) of which one forms the male mold and the other forms the female mold. The control device also comprises a first pneumatic or hydraulic piston-cylinde...
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WO/2003/019017A1 |
A hydraulic pressure control device of a construction machine comprising a target velocity table (4) storing the target operational velocity of a hydraulic actuator (30) with respect to the manipulated variable of an operation member (2)...
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WO/2003/019302A2 |
A hybrid actuation system comprises first and second actuator arrangements (10, 12) arranged to apply first and second output loads respectively to a common element (14). A control method for controlling the operation of the hybrid actua...
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WO/2002/087789A1 |
The invention relates to a controller for an unbalanced mass adjusting unit in a vibration exciter. Said controller comprises an adjusting piston (3) for changing the relative position of unbalanced masses in the vibration exciter (1) th...
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WO/2002/059487A2 |
A method and apparatus for controlling a valve/actuator plant (17) by generating a plurality of independent correcting control signals each (15) responsive to a plurality of respective input signals and at least one of these input signal...
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WO/2002/055887A1 |
The invention can be used for remote control of a valve system of gas, oil and product pipelines. The inventive pneumatic drive comprises an electropneumatic control device (1) provided with electromagnets (2 and 3), pneumatic distributo...
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WO2001031205A9 |
A precision servo control system for a pneumatic actuator has a piston (5) positionable over a stroke of the pneumatic actuator (2) using a supply of pressurized gas. A brake (52) and a sensor system (44) are connected to the actuator (2...
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WO/2002/031364A1 |
The invention relates to an arrangement using fluid technology and to a valve arrangement (12) and an actuator (10) for said arrangement. The actuator (10) is activated by the valve arrangement (12) using fluid force by means of at least...
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WO/2002/029255A1 |
The invention relates to a fluid-activated adjustment and manoeuvre device, especially one working as a valve for a pressurised medium, including a space arranged in a housing (1) in which is arranged an axially displaceable, moveable pi...
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WO2000029825A9 |
A loading assembly (2, 88) for applying a load to a test specimen (1, 105) includes a container (4, 6, 97, 98) having a volume of compressible fluid (3) for providing a spring. A cylinder (6, 97) having a bore (5, 94) operably connected ...
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WO/2001/066341A1 |
When a command to move a ram (5U) is issued, the ram command speed made equal to a constant warmup speed lower than a target speed is commanded until a canceling speed judging unit (75) judges that the speed of the ram (SU) calculated by...
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WO/2001/066340A1 |
A method of controlling the stop of a hydraulic press, comprising the steps of controlling a servo-motor (37) by a rod pressure hold instruction part (67) to reversely rotate a bidirectional pump (29) so as to feed the hydraulic oil not ...
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WO/2001/065121A2 |
Provided is a force-controlled hydro-elastic actuator (10), including a hydraulic actuator (16), having a connection to hydraulic fluid and including a mechanical displacement member (24) positioned to be mechanically displaced by fluid ...
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WO/2001/060734A1 |
A device (10) for controlling the tilt function of a lifting mast (11), for a fork-lift truck (12) is disclosed, whereby a double-acting working cylinder (16), activating the lifting mast (11), is operated in a closed regulating circuit ...
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WO2000016464A9 |
A control system for controlling position of an object includes an integrated actuation package utilizing an electric motor driven servopump (3) to control actuator (4) position. The electric motor (2) operates at a constant direction an...
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WO/2001/027478A1 |
A servo control for a cam phaser (10) includes a pulse width modulated controller (20) that operates a four way solenoid valve (18). The cam phaser piston (12) or vane(s) are positioned with a computer program stored in the controller (2...
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WO/2001/018763A2 |
The invention relates to a method and a device for the transmission of control and/or sensor signals between an electronic control and/or data receiving device (21) and a pneumatic device (10), which are connected to one another by a pne...
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WO/2000/009279A1 |
The invention relates to a device for hydraulically adjusting components, especially the rollers of strand guiding segments of a continuous casting installation with hydraulic cylinders (2) which are subdivided into a cylinder chamber (9...
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WO/1999/031394A1 |
A control method for managing a hydraulic control system (10, 100) of a vehicle is disclosed. The method includes the steps of scheduling the invocation of a plurality of vehicle functions through system operations, which functions are u...
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WO/1998/015741A1 |
A control assembly includes a positioner/actuator and a control valve. The positioner/actuator includes a valve actuator and a positioner for controlling actuator position and speed in response to a control signal. The control valve has ...
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WO/1998/011357A1 |
A compact actuator (21) for use with a fluid and including a housing (31) having a predetermined geometry. An actuation member (41) is mounted in the housing for movement between first and second positions for performing work. The actuat...
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WO/1998/007993A1 |
The invention relates to an electropneumatic positioner with a pneumatically controlled two-chamber actuating drive(1) with a pneumatic air inlet and air outlet valve (10,17) on a pressure pipe (15) of the actuating drive and an addition...
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WO/1998/006017A1 |
With the position regulator according to the invention a first adjusting step and a second adjusting step are generated in order to prevent sustained oscillations about a constant desired value. The size of the first and second adjusting...
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WO/1997/032134A1 |
A power steering control valve (22) includes inner and outer valve members (40, 42) rotatable relative to each other. A force transmitting assembly (114) transmits a force which resists relative rotation between the valve members. A pres...
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WO/1997/025534A1 |
The invention is a multi-stage electro-hydraulic servovalve having a mechanical feedback between the valve's main stage (2) and pilot stage (4). The feedback mechanism makes use of an interconnected set of linkages (74, 82, 88, 96, 98, 1...
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