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WO/2005/008077A1 |
A hydraulic control apparatus includes two oil flow control valves (30, 32) each provided with a supply control portion (36, 38, 52, 54) for controlling an oil supply from a pressurized oil source, and a discharge control portion (40, 42...
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WO/2005/005213A1 |
$g(D)The invention relates to a method for precluding danger of injuring (danger of clamping) a person carrying out maintenance works of a brake system provided with a high-pressure accumulator in a stop position without pedal actuation ...
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WO/2004/109019A1 |
The invention relates to a hydraulic control arrangement, for control of a user (6, 8), with at least one mechanically-operated continuously-adjustable distribution valve (16), with a subsequent LUDV pressure compensator (24) down line. ...
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WO/2004/104379A1 |
The invention relates to a bearing for axially mounting a rotor (8) of a gas turbine. Said bearing comprises a bearing body (2) that is disposed stationary relative to the position of the rotor (8), a hydraulic piston arrangement (3, 4) ...
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WO/2004/104427A1 |
A hydraulic system for a work machine, such as a tractor-mounted front loader, comprises a flow control valve (17) having a valve housing (18) with an internal passageway system (S) for conveying hydraulic fluid through the valve, line p...
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WO/2004/051121A2 |
A circuit (10) for operating a bi-directional air motor (12) of a valve closure system for enabling a tank valve to be discretionally operated to either open or closed condition either at the tank by attending personnel or from a remote ...
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WO/2004/044437A1 |
A device for a single-acting hydraulic cylinder (1) designed to lift or pull a load upon the existence of an oil pressure on the rod-side of a cylinder piston (7), where the cylinder bottom (15) of the hydraulic cylinder (1) is provided ...
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WO/2004/026601A1 |
Disclosed is a drive unit for coaxial rotational movement of two halves (1), (2) of a motor vehicle stabilizer provided with a tubular housing consisting of two housing halves (3), (4), inside which a hydraulically displaceable actuating...
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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/2004/016954A1 |
A modular, reversible actuator (10) contains an integrated manifold, eliminating the need for external tubing and increasing the area of the diaphragm (24), thus providing a greater actuating force. The actuator comprises a housing (12) ...
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WO/2004/013496A1 |
The invention relates to a hydraulic cylinder comprising a piston rod (70) bearing at least one tool receiving element (120). Said hydraulic cylinder is characterised by an automatic disconnection device which is controlled in a hydrauli...
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WO/2003/100265A1 |
A working piston (32) is slidably fitted in a cylinder main body (31), with a rod (34) integrally formed on one surface of the working piston (32). The rod (34) projects to the outside through one end of the cylinder main body (31) and r...
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WO/2003/099637A1 |
The invention relates to a system for controlling at least one hydraulic cylinder (2, 3) comprising a first control valve unit (4), which is connected to said hydraulic cylinder for regulation of the latter, and a first operable control ...
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WO/2003/098052A1 |
An integrated three function valve (ITFV) that combines the functions of a bypass valve (e.g. 183a, 185a, 161a) into a single assembly is disclosed. The ITFV allows continued operation after any two failures. With the integrated three fu...
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WO/2003/048614A1 |
The invention relates to a method for controlling a pressure supply device in a hydraulic circuit, especially in a hydraulic circuit in an automatic gearbox which comprises an hydraulic pump, a pressure control valve and a consumer. The ...
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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/2003/027505A1 |
A hydraulic circuit of a working machine capable of preventing all actuators from being functionally stopped when a pilot hydraulic pressure supply source fails to assure the least safety, wherein an unloading oil passage selector valve ...
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WO/2003/027507A1 |
The invention relates to an energy cylinder (1) for actuating a valve of a turbine, especially a steam turbine. A cylinder housing and a control block are combined to form a common block (58). Said common block comprises two lateral surf...
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WO/2003/025402A1 |
Method for restricting leakage of hydraulic oil in a rock drilling rig (I). The oil level in the tank (3) is read and stored in a memory each time one switches between drilling and positioning of different components on the drill rig (I)...
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WO/2003/016766A1 |
A control valve (36, 37, 39, 40) for controlling the flow of fluid to a fluid-operated actuator, in an open condition in use, allows the flow of fluid from a fluid source to the actuator and, in a closed condition, prevents the flow of f...
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WO/2003/011675A1 |
Back up hydraulic system for providing hydraulic fluid to a steer-by-wire system. The steer-by-wire system comprises a hydraulic steering actuator (21), a hydraulic pump (31) driven by an engine (29), and an electronically controlled val...
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WO/2003/010387A1 |
The invention relates to a lifting system, especially a ferry wharf having a platform which can be brought into a pre-determined lifting position by means of a hydraulic cylinder or a cable winch. A stop device is associated with the dri...
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WO/2003/008811A2 |
The invention relates to the architecture of a hydraulic circuit which is associated with actuators (100) such as aircraft brakes. The invention comprises a main hydraulic circuit (C) which is provided with hydraulic components (4,5,101,...
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WO/2003/004194A1 |
The supply of operating air or oil to a press, shears or like machine is controlled by a pair of spool valves (10,14) connected in a series and each operates a pair of switches (20,22). The switches connect dc current to the solenoids vi...
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WO/2002/101247A1 |
An hydraulic control arrangement (66) in association with a pipe relining machine Includes fluid pressure supply and return lines (32, 33), a motor controller (80) to control a motor (67) and a radial position controller. The radial posi...
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WO/2002/061288A2 |
The invention relates to a hydraulic actuating system comprising a pump (2) which is connected to the working chambers of at least two double-acting piston-cylinder arrangements (1; 14, 15) by means of hydraulic lines (3, 4), one of said...
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WO/2002/018800A2 |
A discharge valve (150) is provided to open an electrically controlled pilot valve (100) in emergency situations such as during an electrical or hydraulic failure. The discharge valve has a poppet (154) that operates in response to a pre...
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WO/2002/008613A1 |
The invention relates to a device for moving heavy covers (10), in particular, doors for the opening and closing of apertures on a vehicle with armour plating (14). The cover (10) is moved by means of a hydraulic drive unit (18), which m...
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WO/2002/001080A1 |
The invention concerns a hydraulic circuit (17) and a control valve (18) dimensioned to be capable of providing the greater part the control surface (3) actuating, which requires less power than the system maximum performances. Moreover,...
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WO/2001/092651A1 |
A hydraulic circuit for construction machinery, comprising a hydraulic pilot-operated control valve for controlling an actuator driving a front attachment and a pilot pipeline leading a hydraulic pilot pressure to the control valve havin...
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WO/2001/083992A1 |
The neutral override circuit of this invention includes a variable displacement pump (12) controlled by a servo (56) fluidly connected to a displacement control (70) that is biased to a neutral position. A charge pump (58) is connected t...
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WO/2001/071200A1 |
A device representing a simple means of multiplying the functionality of wiring in point to point control circuits such that fault tolerant, fault reporting circuits can be constructed with less wire. The circuit can employ the wiring on...
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WO/2001/065120A2 |
A hydraulic servo motor which includes a plurality of digitally latched poppet valves (42, 44) that control the spool position of a spool valve (20). The poppet valves are controlled by a controller (56) which perfoms a servo routine tha...
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WO/2001/064464A1 |
The invention relates to a hydraulic anti-roll system, in particular for a chassis of a motor vehicle. Said system has a tank for hydraulic fluid and a pump which are connected to front and rear-axle actuators via corresponding hydraulic...
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WO/2001/059307A1 |
The invention concerns a fluidic system for safety-oriented control, in addition to a fluidic actuator, a local control device for a fluidic system and a software module for a local control device of a fluidic system. The invention also ...
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WO/2001/054960A1 |
An electro-hydraulic actuator system (10 or 140) includes a hydraulic actuator (27) having a pair of fluid filled chambers (29, 30) and being operable to provide an actuator output (12) as a function of fluid pressures at the chambers. A...
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WO/2001/029430A1 |
A pipe breakage control valve device (100) having an input/output port (1) connected to a bottom port of a hydraulic cylinder (102) and an input/output port (2) connected to one of the actuator ports of a control valve (103) through an a...
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WO/2001/029429A2 |
The invention relates to a safety valve (10) for consumers driven by compressed air, comprising two directional valves (16a, 16b) connected in parallel, each of which can be operated by a pilot valve (26a, 26b) allocated thereto. The two...
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WO/2001/029433A2 |
The invention relates to a device for dynamically monitoring pressure differences in at least two pressure pipes (207, 211), preferably in safety valves of pneumatically operated consumers. The inventive device is characterized in that, ...
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WO/2001/014750A2 |
The invention relates to a drive (10) for a control valve, comprising a drive force unit (12), a yoke (14) for connecting to a valve (16) in a fixed manner, a drive spindle (18) for transmitting the movement of the drive force unit to th...
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WO/2001/012997A2 |
The invention relates to a hydraulic valve arrangement for operating a hydraulic consumer (80). Said arrangement is connected to a hydraulic pressure source (40) by means of at least one pressure connection (30), to the hydraulic consume...
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WO/2001/012948A1 |
The invention relates to the emergency actuation of control systems for the shut down and/or isolation of a fluid circuit containing at least one flexible pipe (42, 44, 46). The flexible pipe (42, 44, 46) being connected to at least one ...
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WO/2001/002735A1 |
The invention relates to a switching device for a machine, especially a digger, comprising at least one supply connection and one useful connection (P, P') in addition to at least one hydraulic accumulator (10). An on-off valve (12) is a...
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WO/2000/071900A1 |
The invention concerns a hydraulic line connection with a supply connection (2) having a pressure line and a return line, each ending at a connection valve (4, 5), and with a safety valve (8) in a line between the pressure line and a con...
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WO/2000/068610A1 |
A duplicate two-channel pneumatic control system enables a flow of compressed air to be delivered to a consumer by applying two control signals essentially simultaneously. The system includes a set-up of pneumatic valves (21, 22; 21', 22...
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WO/2000/034667A1 |
The invention relates to a directional valve with a movable valve piston (5). Said valve piston separates two pressure chambers (6, 8) in the interior of the valve housing from each other which chambers can be impinged upon by a control ...
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WO/2000/026060A1 |
The present invention incorporates a fluid pressure sensing switch (18) in fluid communication with a hydraulic fluid outlet (12) of a hydraulic pump (10) driving a platform lift (4). The pressure switch is calibrated to activate at a pu...
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WO/2000/018382A2 |
Hydraulic directional valve including a control piston (main piston, 3) which can be moved against the force of a spring (main spring, 18) by the tappet of a magnet (12) from its first position (closing position) to its second position (...
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WO/2000/014413A1 |
A protection device for controlling the motion of a pneumatic actuator (3), comprising at least one elongated cylinder (6) provided with a piston (4), dividing the cylinder (6) into a first chamber (5a) and a second chamber (5b), an actu...
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WO/1999/056053A1 |
A control system particularly for use with pipeline plugs and other arrangements which are remotely controlled, and which require to be retrievable in the event of a failure, the pipeline plug including an anchoring/sealing means, the co...
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