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Patent Searching and Data


Matches 551 - 600 out of 33,023

Document Document Title
WO/2013/146140A1
The supply and the discharge of pressurized oil with respect to a hoist cylinder (12) that tilts a vessel (3) is controlled by a control valve device (19). A throttle (24C), which restricts the flow volume of operating oil discharged fro...  
WO/2013/146666A1
The device is provided with a switch valve that operates in interlocking fashion to a control valve through pilot pressure supplied through a pilot valve, and that switches the behavior of an operated check valve. The switch valve is pro...  
WO/2013/145528A1
To sufficiently reduce hydraulic-pump drive losses. This control device is provided with a control unit (14) that: controls the action of a regeneration valve (22) so as to switch to a regeneration state when performing a compound action...  
WO/2013/140561A1
The present invention provides a flushing circuit for a hydraulic cylinder drive circuit, the flushing circuit being configured so as to flush both the reciprocating hydraulic cylinder and the inside of the drive circuit for the reciproc...  
WO/2013/141037A1
A travel-control valve is provided with a valve body and a spool. The valve body has a first pump port connected on the upstream side of a drive-control valve, a first connection port connected on the downstream side of the drive-control...  
WO/2013/138473A2
Certain examples present an improved compressed-air energy storage system. The system can include multiple sequential stages, in which accumulators are charged with air, which influences a hydraulic fluid to influence a pump/motor, and v...  
WO/2013/138473A3
Certain examples present an improved compressed-air energy storage system. The system can include multiple sequential stages, in which accumulators are charged with air, which influences a hydraulic fluid to influence a pump/motor, and v...  
WO/2013/135375A1
Device together with hydraulic system for actuating at least one first hydraulic consumer and at least one second hydraulic consumer. A device (32) for actuating at least one first hydraulic consumer (10) and at least one second hydrauli...  
WO/2013/132721A1
The objective of the present invention is to increase the pump absorption torque and increase the exhaust gas temperature in a hydraulic drive device that performs load-sensing control, thereby enabling filter deposits in an exhaust gas ...  
WO/2013/131394A1
A forging and charging/discharging two-purpose machine comprises a cart walking mechanism, a trolley walking mechanism, a rack revolving mechanism, a forceps mechanism, an electrical system, a hydraulic system and an operation console. T...  
WO/2013/127523A1
A hydraulic load-sensing control arrangement for a first and second hydraulic consumer (A1; A2, B2) is disclosed. A variable displacement pump (3) having load-sensing regulation (43) is provided therein. The highest respective load-sensi...  
WO/2013/128690A1
An operation-state determination unit determines whether a hydraulic cylinder is operating or not operating. A discharge-pressure reduction unit reduces the discharge pressure of a charge pump. When the hydraulic cylinder is not operatin...  
WO/2013/128622A1
Provided is a method for controlling a variable displacement pump using a closed center type directional control valve and calculation by a controller. According to the method of the present invention, it is possible to effectively utili...  
WO/2013/127175A1
Disclosed is a hydraulic system (100), comprising an oil tank (110), a hydraulic cylinder (108), a liquid-controlled reversing valve (106), a control apparatus, an apparatus providing a control oil supply and a pressure-sensing apparatus...  
WO/2013/127439A1
The invention relates to a compressed-air device for controlling valves, including, in a longitudinal direction: a first vane-type rotary actuator (1) having a front surface (2) as well as a back surface (4), said front surface (2) being...  
WO/2013/125079A1
A hydraulic drive system, wherein: a shuttle valve (51) connects a second flowpath (18) and a drain flowpath (52), when the oil pressure in a first flowpath (17) is greater than the oil pressure in the second flowpath (18); and the shutt...  
WO/2013/126312A1
A hydraulic system (16) is disclosed for use with a machine (10). The hydraulic system may have a tank (28), a motor (22) with a fluid inlet and a fluid outlet, and a pump (18) configured to draw fluid from the tank and discharge the flu...  
WO/2013/123792A1
A hydraulic control system comprising an oil cylinder (1). A small chamber of the oil cylinder is connected to a first oil line (11); a large chamber of the oil cylinder is connected to a second oil line (12). The first oil line (11) is ...  
WO/2013/121111A1
Invention relates to a valve arrangement (30) for controlling gas flow in a turbocharged internal combustion piston engine (12) comprising at least two parallel valve units (30.1...30.N), characterized in that a first group of the parall...  
WO/2013/121922A1
Construction machinery is provided which can significantly reduce fuel consumption through the efficient use of recovered energy. The construction machinery includes: a first hydraulic pump (3) and a second hydraulic pump (9) for dischar...  
WO/2013/117052A1
A hydraulic pumping system for concrete pumping equipment, and concrete pumping equipment comprising the same, comprising a first main oil cylinder (1), a second main oil cylinder (2), a main oil pump (10) alternately supplying oil for t...  
WO/2013/115057A1
A structure for an automatic transmission control valve body (1) configured by inserting a separating plate (30) between main valve bodies (10, 20). The openings of the grooves (10a, 20a) formed in the respective opposing surfaces of the...  
WO/2013/114556A1
A hydraulic device (1) wherein an operating cylinder (2) and an acceleration cylinder (3) are equipped with pistons (5, 12), rods (6, 13), and tubes (4, 11), with the tubes (4, 11) partitioned into rod-side compartments (8, 15) and botto...  
WO/2013/113317A1
The present invention relates to a system (2) for control of a hydraulic system primary for pitch control of at least one rotor blade for a windmill which pressure source (4) through valves are connected to at least a first port (28) in ...  
WO/2013/115986A1
A hydraulic system includes a pump (22) that draws fluid from a reservoir (24) and an actuator (26) having a first port and a second port. A metering valve arrangement (28) controls fluid flow through the actuator and includes a meter-in...  
WO/2013/115053A1
This hybrid construction machine is provided with: a first and a second main pump; a first and a second supply path; a first and a second circuit system; a hydraulic motor; a motor generator; an assist pump; a branched converging path co...  
WO/2013/114980A1
This fluid pressure control device is provided with: a first control valve that switches in a manner so that a working fluid is supplied to the pressure chamber of a cylinder upon which the load pressure of a load acts, thus controlling ...  
WO/2013/115140A1
In a hydraulic closed circuit employing a single rod type hydraulic cylinder, delayed response of the flushing valve, and hunting of the flushing valve due to pressure pulsations of the circuit, are prevented, preventing diminished opera...  
WO/2013/111707A1
A hybrid construction machine comprises first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage which is connected to the assi...  
WO/2013/111705A1
A circuit pressure control apparatus comprises: a relief valve which is connected to a connection passage with which an actuator communicates on the upstream side; and a variable throttle which is upstream of the relief valve and the ope...  
WO/2013/108352A1
A hydraulic pressure control circuit having a pressure-boosting opening/closing valve mechanism for supplying a control pressure from a hydraulic pressure source to a predetermined actuator, and a pressure-reducing opening/closing valve ...  
WO/2013/108440A1
[Problem] To provide a hydraulic device with which the power consumption can be greatly reduced. [Solution] Low-pressure operating oil transmitted from a small-capacity pump (6) via an oil supply pipe (13) can be fed into cylinder units ...  
WO/2013/108889A1
This hydraulic control device for a work machine is provided with a drive device for generating a drive force for travel by the work machine, a parking brake device for parking the work machine, an operating unit provided in a cab of the...  
WO/2013/105199A1
A hydraulic control device is configured so as to reduce the loss of power of a pump in combined boom lowering and arm pushing operation. During the single operation of boom lowering, a controller (30) performs single control for increas...  
WO/2013/105357A1
Provided is a drive device with which variation in cylinder speed when the load is reversed can be suppressed, and operability can be improved, in a hydraulic closed circuit system that drives a single-rod cylinder by means of a hydrauli...  
WO/2013/103954A3
A method of controlling a float function of a cylinder 25 having a first side and a second side includes connecting the second side of the cylinder to a reservoir 15; connecting the first side of the cylinder to an output of a pump 20 an...  
WO/2013/099575A1
This hydraulic control device for a forklift includes a hydraulic pump, a single electric motor for driving the hydraulic pump, an outflow control mechanism provided between a lift cylinder and the hydraulic pump, a flow rate control val...  
WO/2013/099710A1
The amount of operation of an operation lever (4a) is detected by a pressure sensor (16) and input into a controller (9), at the lowering operation of a boom (111). The controller (9): finds a target flow rate (QO) for return oil dischar...  
WO/2013/096300A3
A system (20) has a variable displacement pump (50) that supplies pressurized fluid to power a plurality of hydraulic functions (31-36). Each hydraulic function has a control valve (51-56) with a variable source orifice (64) controlling ...  
WO/2013/096096A1
A hydraulic system (200) includes a fluid source (202), a metering valve (212, 286), an actuator (289), and a power reclamation assembly (222). The metering valve (212, 286) includes a standby position, and an actuation position differen...  
WO/2013/095208A1
The invention relates to a method for controlling lowering of an implement (3) of a working machine. The working machine has a hydraulic system (10) comprising a hydraulic cylinder (11) for moving the implement and a first control valve ...  
WO/2013/095926A1
A hydraulic system (200, 300) includes a first hydraulic circuit (201, 301) and a second hydraulic circuit (208, 308). The first hydraulic circuit (201, 301) includes a hydraulic cylinder assembly (202, 302), a pressurized fluid source (...  
WO/2013/089127A1
The present invention addresses the problem of being able to increase the effect of preventing an engine from stalling by reducing the engine load attributable to a fixed-capacity hydraulic pump. A working vehicle (1) provided with a fix...  
WO/2013/090698A1
In various embodiments, valve efficiency and reliability are enhanced via use of hydraulic or magnetic valve actuation, valves configured for increased actuation speed, and/or valves controlled to reduce collision forces during actuation.  
WO/2013/089230A1
The invention addresses the problem of avoiding insufficient flow being supplied to the hydraulic actuator and speed becoming insufficient during light loads in hydraulic machinery such as hydraulic shovels when the engine rotation speed...  
WO/2013/084346A1
A hydraulic control device is provided with: a pressure regulating valve for regulating hydraulic pressure, which is generated by an oil pump, to a working hydraulic pressure required by a control circuit; a signal pressure generating va...  
WO/2013/084457A1
A hydraulic drive device (1) is provided with a pump (11), a steering wheel actuator (16), cargo-handling device actuators (17, 18), a drive instrument (15), a relief valve (36), and an input unit (24). When operating tools (32, 33) are ...  
WO/2013/084456A1
A hydraulic control device (10) is provided with: a hydraulic pump (30) to which steering cylinders (18L, 18R) and boom cylinders (22) are connected in parallel; a steering control valve (34) which controls the direction of hydraulic oil...  
WO/2013/081220A1
Disclosed is a swing relief energy regeneration apparatus in which working oil relieved into a hydraulic tank is stored in a pressure accumulator during swing and deceleration to recycle the stored pressure. The swing relief energy regen...  
WO/2013/078817A1
Disclosed in the present invention is a flow distributing and converging hydraulic control system for an engineering machine, which comprises: a first oil supplying pipeline and a second oil supplying pipeline communicated or disconnecte...  

Matches 551 - 600 out of 33,023