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Patent Searching and Data


Matches 651 - 700 out of 33,201

Document Document Title
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...  
WO/2013/081874A1
A hydraulic system (23) includes a hydraulic transmission (24) including a hydraulic pump (26) configured to be coupled to a prime mover (12), a hydraulic motor (28) configured to be coupled to an output shaft (32), and fluid lines (46) ...  
WO/2013/080633A1
In order to provide a regeneration control device for work vehicles which is capable of preventing the operational discomfort and uneasiness of an operator by attenuating the disparity between driving performance during regeneration, i.e...  
WO/2013/075447A1
Disclosed is a rotary drilling rig and a device controlling the main hoist lowering speed therefor. The device controlling the main hoist lowering speed comprises: a sensor (1), a controller (3), and a reversing valve apparatus, wherein ...  
WO/2013/073112A1
The cushion valve device (11) comprises a valve block (12). The valve block (12) comprises a first pathway (13), a second pathway (14), and a first discharge pathway (31). The first pathway (13) lies between the first supply-discharge pa...  
WO/2013/069374A1
A closed hydraulic circuit system (100) capable of driving a hydraulic cylinder (3) having a first port (3b) and a second port (3c) comprises: a hydraulic pump (1) which has a first pump port (1a) hydraulically connected to the first por...  
WO/2013/070466A1
A hydraulic circuit (200) including a hydraulic swing motor (16) having a first port (214) and a second port (216). A first motor conduit (210) connected to the first port (214) of the hydraulic swing motor, and a second motor conduit (2...  
WO/2013/066803A1
A machine (10) such as a wheel loader (10) includes a frame (16) and ground engaging propulsion elements (14) coupled with the frame (16). A hydraulically actuated implement system (12) of the machine (10) includes a linkage (34) and an ...  
WO/2013/063997A1
A hydraulic control loop comprises a direction control valve (10) having a bypass throttle loop and an execution element (20) connected to the direction control valve. The hydraulic control loop further comprises a valve (30). The valve ...  
WO/2013/065530A1
The present invention relates to a flow rate control device, and the flow rate control device (10) comprises: a body (16) having first and second ports (12, 14) for supplying and discharging pressurized fluid; a set of first and second s...  
WO/2013/063749A1
Provided is a hydraulic control circuit. The hydraulic control circuit comprises a directional control valve (10) having a bypass throttle loop and an actuator element (20) connected to the directional control valve. The hydraulic contro...  
WO/2013/061129A1
Disclosed is an exemplary hydraulic system including a first fluid circuit 12 and a first pump 18 fluidly connected to the first fluid circuit. The first pump configured to produce a fluid output at a first flow rate when operated at a s...  
WO/2013/056454A1
A method for controlling a hydraulic cylinder comprises: controlling the acceleration of a hydraulic cylinder when the hydraulic cylinder advances, and/or, controlling the acceleration of the hydraulic cylinder when the hydraulic cylinde...  
WO/2013/056545A1
Provided are an energy-recoverable hydraulic actuator and an actuating method. The actuator comprises an electrical energy storage device (1), a controller (2) for an electric motor, the electric motor (3), an element (4), a first hydrau...  
WO/2013/058326A1
The present invention is a power-operated hydraulic operation machine for driving a hydraulic pump via an electric motor to drive an actuator, and also for controlling load sensing using speed control of the electric motor, wherein by re...  
WO/2013/058099A1
The aim of the present invention lies in providing a hydraulic drive system for a work vehicle, in which hydraulic oil can be supplied to an accumulator when a work device is raised, and in which, when the work device is held in a raised...  
WO/2013/057919A1
Provided is a hydraulic control device for which it is possible to reduce power loss and to suppress cavitation of a regenerative motor for regenerating energy possessed by a hydraulic actuator; also provided is a work machine equipped w...  
WO/2013/059092A3
Fluid regulator systems having reset apparatus and methods are de¬ scribed herein. An example reset apparatus (700) for use with a fluid regulator system includes a first valve (706) having an inlet (710) to receive a loading fluid and ...  
WO/2013/059092A2
Fluid regulator systems having reset apparatus and methods are described herein. An example reset apparatus for use with a fluid regulator system includes a first valve having an inlet to receive a loading fluid and an outlet in fluid co...  
WO/2013/058325A1
 Provided is a hybrid-driven hydraulic work machine equipped with an assist motor (10) coupled to an engine (7) and a hydraulic pump (6), wherein the engine torque can be maintained to a desired value when the load of the hydraulic pum...  
WO/2013/058973A1
A hydraulic system (56) includes a variable-displacement first pump (68A, 68D), a variable-displacement second pump (68B, 68C), and a first actuator (32, 34, 42L, 42R) selectively connected either to the first pump in a closed loop manne...  
WO/2013/059777A1
A counterbalance valve is provided with load-sensing, hydro-mechanically setting, features. The counterbalance valve relief setting changes dynamically based on the load pressure at the load port (1) of the counterbalance valve.  
WO/2013/051551A1
In order that a hydraulic drive system which performs load sensing control is configured such that a deposit on a filter in an exhaust gas purification device can be efficiently removed by combustion by pump output increase control and e...  
WO/2013/047062A1
A surplus flow control unit (50) controls an inverter (6): in a manner such that when the flow discharged from a pump (1) is a high flow, the surplus flow from a relief valve (3) is a low surplus flow; and in a manner such that when the ...  
WO/2013/046660A1
The invention is designed to further reduce the size of gas supply lines and gas apparatuses as well as to further facilitate maintenance of various machines. The invention is a supply apparatus in which supply lines are formed by a gas ...  
WO/2013/041256A1
The invention relates to a fluid system for a machine for producing a fiber web, in particular a paper, tissue, or cardboard machine. The system has at least one actuator (1), which can be driven with a working fluid, and at least one di...  
WO/2013/040780A1
Disclosed is a control system for a variable displacement pump, which system comprises a variable displacement pump control mechanism (1), an oil outlet pipeline (11) of which variable displacement pump control mechanism is in communicat...  
WO/2013/040872A1
A hydraulic control valve, a dual-cylinder extension system and an aerial work engineering machine. The control valve comprises a flow distributing and collecting valve, and control valve body is provided with a first oil opening, a seco...  
WO/2013/042484A1
The present invention is a hydraulic control device that controls a hydraulic pump in a construction machine for which a hydraulic actuator is connected to the hydraulic pump via a closed-center type direction-switching valve, and the po...  
WO/2013/042483A1
The present invention is a hydraulic control device that controls an unload valve control means and a hydraulic pump in a construction machine for which a hydraulic actuator is connected to a hydraulic pump via a closed-center type direc...  
WO/2013/040767A1
Disclosed is a gate-type concrete pump and a pumping control system therefor. The pumping control system for the gate-type concrete pump comprises a gate control system (10) and a main hydraulic cylinder control system (20), the gate con...  
WO/2013/037198A1
Disclosed in the present invention is a water plunger pump has two plunger groups (1, 2) each comprised bynsists of a water cylinder (11, 12) and an oil cylinder (12, 22). A water cylinder piston and an oil cylinder piston of each plunge...  
WO/2013/035484A1
A work machine configured such that the maximum value for absorption torque for a hydraulic pump is changed to a higher value when the work machine is in a specified state, and wherein the issues occurring when an operation lever is oper...  
WO/2013/035815A1
A hybrid excavator as in an embodiment of this invention is provided with a main pump (14), a hydraulic pump and motor (310) using hydraulic oil flowing out from a boom cylinder (7) to function as a hydraulic motor and to function as a h...  
WO/2013/033884A1
Provided are concrete pumping equipment and a hydraulic system thereof, wherein the hydraulic system comprises: a first hydraulic subsystem comprising a first pump (5) and at least one first actuator (6), with a first multi-way reversing...  
WO/2013/035521A1
Provided is a hydraulic system for a work machine, whereby responsiveness during low-temperature operation of remote control valves that pilot-operate pilot switching valves for hydraulic actuator control can be secured. A warm-air circu...  
WO/2013/029255A1
Disclosed in the present invention are a speed control method, device, system for an electro-hydraulic proportional valve and engineering machinery with the same. The method comprises: receiving the expected speed; comparing the expected...  
WO/2013/031768A1
A hydraulic drive device for performing load sensing control. The hydraulic drive device fulfills the same function as devices provided with an unload valve, recovers the energy of hydraulic oil discharged to a tank from a main pump, and...  
WO/2013/029254A1
Disclosed in the present invention are a speed control method, device, system for an electro-hydraulic proportional valve and engineering machinery with the same. The method comprises: obtaining the actual speed of a hydraulic execution ...  
WO/2013/027620A1
In this hydraulic drive system (1), a hydraulic-oil path (15) forms a closed circuit between a hydraulic pump (10) and a hydraulic cylinder (14). When the hydraulic pump (10) supplies a hydraulic oil to the hydraulic cylinder (14) via a ...  
WO/2013/026189A1
Disclosed are a concrete pump truck and a hydraulic control system thereof. The hydraulic control system includes: a first hydraulic pump (11); a flow control assembly (2) of which an input end is connected with an oil outlet of the firs...  
WO/2013/027619A1
In this hydraulic drive system, a hydraulic-oil path forms a closed circuit between a main pump and a hydraulic cylinder. A charge pump replenishes the hydraulic oil in the hydraulic-oil path. A pump control unit performs flow-rate reduc...  
WO/2013/027618A1
In this hydraulic shovel, a hydraulic cylinder drives a boom via a hydraulic oil discharged from a first hydraulic pump. A first hydraulic circuit connects the first hydraulic pump and the hydraulic cylinder, forming a closed circuit the...  
WO/2013/023381A1
Disclosed are a hydraulic oil flow distribution method and a device thereof for hydraulic system. The hydraulic system includes multiple oil passages and an oil pump from which hydraulic oil is supplied to the multiple oil passages. The ...  
WO/2013/023366A1
A brake valve assembly comprises an accumulator (52) for storing oil, a pressure detector for detecting pressure of the oil in the accumulator, a liquid charging valve (40a, 40b) arranged on a liquid charging oil passage of the accumulat...  

Matches 651 - 700 out of 33,201