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WO/2015/030234A1 |
Provided is a hydraulic drive device with which the operability of multiple single-rod hydraulic cylinders is improved. The drive device is configured so as to be equipped with: a closed circuit (A) wherein a first and a third hydraulic ...
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WO/2015/025818A1 |
Provided is a hydraulic control device for a work machine with which power controllability can be adequately improved while ensuring the speed controllability of a hydraulic actuator with respect to an operation input from an operation d...
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WO/2015/025713A1 |
The objective of the present invention is to provide a multidirectional switching valve having a configuration whereby an increase in the speed of a first actuator when a second actuator is operated can be stopped without adding external...
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WO/2015/026039A1 |
The present invention relates to a pneumatic pressure device for a power line-laying robot, which causes reciprocal movement of the power line-laying robot and comprises: an initiation valve for initiating supply of air having a specific...
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WO/2015/019489A1 |
This work vehicle comprises an engine, a hydraulic actuator, a first hydraulic pump, a hydraulic motor, a second hydraulic pump, an accumulator, and a pump control unit. The hydraulic actuator drives a work machine. The first hydraulic p...
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WO/2015/019812A1 |
The present invention addresses the problem of providing a regulator unit which has a simple and compact configuration and makes it possible to continuously manipulate cylinder pressure so as to vertically move a workpiece at a desired v...
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WO/2014/073551A9 |
A fluid pressure control device for a power shovel, comprising: first, second, and third pumps; a first switching valve connected to the first pump; a second switching valve connected to the second pump; a first confluence control valve ...
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WO/2014/207409A1 |
A method for controlling a lift cylinder for an aircraft engine nacelle, a cylinder lifting system implementing the method and a nacelle equipped with same. The cylinder lifting system comprises a means (28, 37-39; 64, 68; 50) for modify...
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WO/2014/204317A1 |
A device for automatically adjusting the working width of the first plough body (111) of a plough (1) in accordance with the variable working width of subsequent plough bodies (112, 113), in which a first hydraulic cylinder (13) is arran...
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WO/2014/195042A1 |
A hydraulic valve arrangement (1) is provided comprising comprising a supply port arrangement having a high pressure port (2) and a low pressure port (4), a working port arrangement having two working ports (6, 7), a first valve (13) arr...
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WO/2014/192458A1 |
The purpose of the present invention is to limit wasted energy consumption due to throttled pressure loss of pressure compensated valve during combined operation in which two actuators with large maximum required flows are driven simulta...
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WO/2014/183941A1 |
The invention relates to a linear actuator having a double pump (23, 24) and a differential cylinder (9), the annular chamber (48) or piston rod chamber of which is delimited by an annular surface (A1) or piston rod surface of a piston a...
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WO/2014/180322A1 |
A power unit of a hydraulic pumping unit comprises: a motor (1), a pumping rod driving device (5) for driving the reciprocating motion of the pumping rod, a motor driven variable pump (2) hydraulically connected to the pumping rod drivin...
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WO/2014/180785A1 |
There is provided an energy accumulation and distribution system. An energy accumulator accumulates waste energy. A first energy interface is adapted for receiving first waste energy to be accumulated from a braking power reserve. A seco...
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WO/2014/174095A1 |
A method for regulating the speed of a clamping and lifting device (1) with at least one guide cylinder (2). A hydraulic fluid can flow in and out through in each case one opening in at least two cylinder chambers of the at least one gui...
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WO/2014/168058A1 |
The present invention provides an apparatus for driving a work machine which is capable of driving one or more hydraulic pumps in a maximally high capacity region at maximum efficiency. In this apparatus for driving a hydraulic shovel, a...
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WO/2014/165888A1 |
The invention relates to an electrohydraulic control circuit for controlling a hydraulically actuated control element (5.6), by means of which a segment (5.3) of a manipulator, in particular of a large manipulator for self-propelled conc...
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WO/2014/166855A1 |
The invention relates to a rotational device for the rotational positioning of a working unit on a machine or system, said rotational device having a worm gear (12) which comprises a helical worm (24) and a worm wheel (26) that engages t...
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WO/2014/162745A1 |
A drive control system (1) for a hydraulic shovel (2) is provided with a control device (50). The drive control device (50) is configured in such a manner that, when accelerating a rotatable body (5) to a target rotational speed, the dri...
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WO/2014/155972A1 |
Provided is a hydraulic shovel capable of moving at a suitable speed even during complex operations of a boom, an arm, and a bucket, without a significant loss of pressure. This hydraulic shovel comprises: a first pump (31) connected to ...
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WO/2014/156532A1 |
In this pump discharge flow rate control device, the discharge flow rate of a variable displacement pump is controlled to decrease in response to increases in the control pressure which is adjusted by means of a regulator, and this pump ...
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WO/2014/147739A1 |
A flow rate control valve (11) comprises: a body (12) provided with a variable throttle (12a) on the high-pressure side, and also with a control throttle (12b) on the low-pressure side; a spool (13) for dividing the inside of the body (1...
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WO/2014/147987A1 |
A shock-absorbing valve (1) is provided with a housing (2) which has a pair of primary chambers (25A, 25B) and a pair of secondary chambers (26A, 26B). A first spool (3) and a pair of second spools (4A, 4B) are installed within the housi...
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WO/2014/148449A1 |
The present invention is configured in a manner so that, in addition to a main pump (102) that performs load sensing control and is provided with two discharge ports (102a, 102b), two subpumps (202, 302) are provided that perform load se...
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WO/2014/151241A1 |
A valve assembly includes a valve including an inlet and an outlet, and a soft start valve in a normally closed position and located upstream of the valve. The soft start valve opens when a percentage of an outlet pressure at the outlet ...
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WO/2014/150796A1 |
A servo actuator system (10) and method of operating the same includes a dual acting actuator (16,17) comprising an actuator body (14,19) and a movable member (12,15) movable in the actuator body to define a first and second chamber on e...
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WO/2014/139208A1 |
Disclosed is a hydraulic system of a full-hydraulic transplanting machine with a differential locking function, the system comprising an oil tank (15), an oil pump, a plurality of electromagnetic valves, a plurality of motors, a front wh...
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WO/2014/144057A2 |
A hydraulic actuator adapted to be coupled to one or more pistons of a compressed air energy storage (CAES) system includes a housing forming a plurality of aligned bores, with a shaft disposed therein for reciprocating movement. For a t...
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WO/2014/141426A1 |
This hydraulic device for driving an oil well pump is provided, as a pump main body within a single housing by means of a single unit structure, with at least a bidirectional variable-capacity piston pump, a discharge quantity detection ...
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WO/2014/142562A1 |
The present invention relates to a hydraulic system for a construction machine, and more particularly, to a hydraulic system for a construction machine including a plurality of actuators. Each of the actuators has a pump/motor, is operat...
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WO/2014/135285A1 |
An object of the present invention is to solve such problems associated with installing of a spool-type regenerative valve, in that an overall installation space of a hydraulic valve increases and processing that requires accuracy become...
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WO/2014/137124A1 |
Disclosed is a hydraulic pressure booster cylinder integrated with a booster pump device. Instead of employing a hydraulic power unit to operate a conventional hydraulic cylinder, the hydraulic pressure booster cylinder integrated with a...
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WO/2014/135284A1 |
An object of the present invention is to solve such problems associated with a merging circuit using a pair of spool-type direction switching valves, in that the installation space of a hydraulic valve device increases and the processing...
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WO/2014/136649A1 |
A pilot-operated pressure control valve is provided with a main valve, a first valve, and a first throttle section. The main valve has: a main valve body which opens and closes a main flow passage; a main high-pressure chamber which is p...
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WO/2014/137250A1 |
The present disclosure relates to a pilot pressure control system (28) for controlling a pilot signal pressure at a pilot inlet (24; 26) of a control valve (22). The pilot pressure control assembly (28) comprises a pilot outlet (36) adap...
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WO/2014/135286A1 |
A pressure loss reducing circuit reduces a pressure loss of oil returning from an actuator to a direction switching valve with a simple configuration while suppressing an increase in the manufacturing cost and substantially eliminating t...
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WO/2014/132495A1 |
This construction machine is provided with an actuator driven by working fluid, and is characterized by being provided with: a state-value detection unit for detecting a state value indicating an operation state of the actuator; a mode d...
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WO/2014/132732A1 |
An actuator unit is provided with: a rod-side chamber and a piston-side chamber, which are separated by a piston; a tank; a first opening/closing valve which connects and disconnects the rod-side chamber and the piston-side chamber; a se...
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WO/2014/133201A1 |
Disclosed is a hydraulic system for construction equipment for reducing back pressure formed in a return flow path when working oil is supplied to the small chamber of a hydraulic cylinder such that the working oil discharged from a larg...
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WO/2014/124919A1 |
The invention relates to a multistage position cylinder (100) for a pneumatic unit. The multistage position cylinder comprises at least one cylinder body (110), a main piston (120), a first intermediate piston (150), and a second interme...
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WO/2014/127356A1 |
A load sense open center hydraulic system provides efficiency and operator feedback and includes one or more constant flow- open center valves (218); respective one or more parallel power cores (238) operatively coupled to the one or mor...
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WO/2014/125854A1 |
This actuator unit is equipped with: a rod-side chamber and a piston-side chamber delimited by a piston inside a cylinder; a tank; a direction-control valve which makes it possible to selectively supply a working fluid discharged from a ...
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WO/2014/125887A1 |
This actuator unit is equipped with: two chambers delimited by a piston inside a cylinder; a supply channel capable of supplying a working fluid discharged by a pump to the two chambers; a discharge channel capable of connecting the two ...
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WO/2014/123254A1 |
Disclosed is a hydraulic construction machinery capable of operating a travel apparatus and a swing apparatus, when same are to be operated in combination, by means of working fluids supplied at the maximum discharge flow rate from a plu...
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WO/2014/121088A1 |
A valve includes a pressure limiting flow spool disposed in a valve body. The spool is movable in a first direction from a first position to a second position and in the first direction from the second position to the third position. The...
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WO/2014/121081A1 |
A hydraulic valve assembly includes an inlet; an outlet; a pressure compensator upstream of the inlet; and a pressure limited flow priority boost valve spool movable between a first position and a second position and comprising an outer ...
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WO/2014/117592A1 |
A dual-arm wheeled rescue machinery hydraulic system comprising a first oil pump (1), a second oil pump (2), and a third oil pump (3). An oil supply pipe of the first oil pump (2) is in communication with an upper car right working arm, ...
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WO/2014/115527A1 |
A hydraulic pressure drive device (1) is provided with direction control valves (26), electromagnetic proportion control valves (42), operating valves (37), and a control device (50). The direction control valves (26), which are provided...
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WO/2014/115407A1 |
The purpose of the invention is to reduce energy loss and improve energy efficiency while ensuring the same travel speed as in the past during a traveling action, and to minimize the effect of travel load fluctuations or a change in the ...
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WO/2014/115469A1 |
The present invention is provided with a switching valve that is activated in conjunction with a control valve by pilot pressure supplied through a pilot valve, the switching valve switching the action of an operation check valve, and th...
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