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Patent Searching and Data


Matches 501 - 550 out of 33,304

Document Document Title
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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 ...  
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 ...  
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...  
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...  
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 ...  
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, ...  
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...  
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 ...  
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...  
WO/2014/112566A1
Provided is a device that is for recovering pressurized oil energy from a work machine and that can recover energy efficiently and secure operability comparable to standard construction machines without an increase in size in the device ...  
WO/2014/113152A1
A pump system has a piston pump. The piston pump has a cylinder block with an inlet port, an outlet port, and a plurality of cylinders. Each cylinder in the plurality of cylinders is connected to the inlet port by an inlet passage and to...  
WO/2014/112164A1
Rather than exhibiting a relief function when the hydraulic motor exceeds a specified maximum operation pressure, the hydraulic motor control device keeps the operation pressure from exceeding the maximum operation pressure, thereby stab...  
WO/2014/110901A1
A hydraulic apparatus based on a confluence control mode comprises a load sensing unit provided with a first and a second reversing valves (1, 2), and a throttle governing unit provided with a fourth reversing valve (3). A confluence val...  
WO/2014/109131A1
According to the present invention, discharge ports of each of closed-circuit hydraulic pumps (2a, 2b) are connected to the head-side chambers and the rod-side chambers of arm/boom cylinders (7a, 7b). On-off valves (12a, 12b) are dispose...  
WO/2014/103273A1
A boom cylinder circuit (16) is provided with a boom control valve (24) which controls the supply and discharge of hydraulic oil to and from a boom cylinder (9), and a merge switching valve (25) which can be switched between a supply pos...  
WO/2014/097709A1
Provided is a hydraulic control device for machinery that performs cutoff control during necessary operations even when the hydraulic pump discharge pressure exceeds a cutoff pressure. The hydraulic control device is provided with: a var...  
WO/2014/097423A1
Provided is a hydraulic circuit comprising: a plurality of hydraulic pumps that are hydraulic pressure supply sources; a flow-dividing valve that prioritizes the supply of hydraulic fluid from these hydraulic pumps to steering and suppli...  
WO/2014/097693A1
Provided is a hydraulic circuit for controlling the operation of a hydraulic cylinder, the hydraulic circuit having: a hydraulic pump for discharging hydraulic fluid fed to the hydraulic cylinder; a detection means for detecting the back...  
WO/2014/100594A1
A pump control assembly having a flow control assembly (16) disposed between the first end (46) of a load sensing valve (42) and a fluid pump (20) is disclosed. The flow control assembly may include an orifice (112), a first valve assemb...  
WO/2014/097688A1
This shovel, that digs according to complex digging operations that include arm closing operations and boom lifting operations, comprises: a digging operation detecting unit (300) to detect that complex digging operations are performed; ...  
WO/2014/094371A1
A hydraulic system of a fully hydraulic rice transplanter, comprising a fuel tank (15), a fuel pump, several solenoid valves, and several motors. The system comprises a front-wheel drive oil-way, a rear-wheel drive oil-way, and a transpl...  
WO/2014/090400A1
A method for the production of hydraulic and electric energy from the rolling motion generated by vehicular and non-vehicular traffic, which envisages the establishment of a flow of fluid moving between at least two tanks, the first of w...  
WO/2014/091684A1
Provided is a construction machine that makes it possible to prevent cavitation and reduce power loss. The construction machine is provided with: a lower traveling body; an upper turning body; a front attachment; a plurality of hydraulic...  
WO/2014/091685A1
Provided is a hydraulic circuit that makes it possible to switch the circuit state between a state in which a regenerative action operates and a state in which the regenerative action stops. The hydraulic circuit comprises: hydraulic pum...  
WO/2014/091683A1
Provided is a hydraulic circuit for a construction machine that has a simple configuration and that makes it possible to enhance the effect of reducing pressure loss that is caused by oil returning from the head-side chamber of a hydraul...  
WO/2014/087978A1
A work machine is provided with an inverter (9A) for controlling an assist torque amount (Tm) to an engine from a motor generator (2) on the basis of the size of a deviation (e) of the actual speed of the engine (1) from a target speed, ...  
WO/2014/086327A1
Hydraulic cylinder (10) with end position damping comprising at least one cylinder (11) in which there is arranged at least one piston (12) which is connected to at least one piston rod (13) and can be moved in the axial direction, where...  
WO/2014/086554A3
The invention relates to a method for displaying the position of a hydraulically actuated fitting, with a piston (121) in an actuating cylinder (1.2) for actuating the fitting (1.1), the piston being connected via two hydraulic lines (2,...  
WO/2014/086569A1
The invention relates to a hydraulic arrangement with a valve block which is designed such that two pressure medium sources (6, 10) can be connected. A pressure medium connection between a load (26) connected to the valve block and the f...  
WO/2014/086484A3
In a method for operating a hydraulic device for providing a supply to hydraulic consumers (V) on a plastics injection moulding machine, provision is made of a pump (10) with a volumetric delivery characteristic that results in cyclic pu...  
WO/2014/086554A2
The invention relates to a method for displaying the position of a hydraulically actuated fitting, with a piston (121) in an actuating cylinder (1.2) for actuating the fitting (1.1), the piston being connected via two hydraulic lines (2,...  
WO/2014/084862A1
Systems and methods are described for actuating a plurality of pneumatic valves to positively isolate one or more pieces of equipment. A manual valve can be disposed on a supply conduit that fluidly couples each of the pneumatic valves t...  
WO/2014/084213A1
In addition to performing load-sensing control of a main pump (2) by rotational frequency control of an electric motor (1) using a controller (50), cutoff control for controlling the rotational frequency of the main pump (2) is performed...  
WO/2014/080664A1
A main valve (42) operates at a filling position where an air supply port (45) and a communication port (48) communicate, and a discharge position where a discharge port (47) and the communication port (48) communicate. A supply and exha...  
WO/2014/080619A1
In a hydraulic drive system (1), hydraulic fluid from an actuator pump (11) is supplied to actuators (16 - 18) via an actuator drive circuit (13). In the hydraulic drive system (1), hydraulic fluid from a fan pump (61) is also supplied t...  
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 ...  
WO/2014/073497A1
The control system is provided with: a pressure detector for detecting the swing pressure or braking pressure of a swing motor; a swing regeneration switching valve that opens when the pressure detected by the pressure detector reaches a...  
WO/2014/073541A1
The present invention improves energy efficiency by reducing the throttling-off loss of the delivery flow rate of a hydraulic pump due to bleed-off control and improves operational performance by enabling control of hydraulic pump delive...  
WO/2014/072684A1
This invention relates to a clamp arrangement for coupling two components (213,215), comprising: a clamp (250) having at least two arms (314a, 314b, 314c) which are operable so as to close around either or both of the first and second co...  
WO/2014/074713A1
A method and system is provided for controlling a hydraulic actuator in a work machine by opening a load holding valve in a measured fashion in order to leak hydraulic pressure back into a depressurized portion of the hydraulic circuit, ...  
WO/2014/073416A1
The present invention is provided with a plurality of spools incorporated into a valve body, a cap provided to the valve body, pilot chambers corresponding to the spools and provided in the cap, a maximum-pressure introduction passage fo...  

Matches 501 - 550 out of 33,304