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JP6616675B2 |
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JP6603568B2 |
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JP6603307B2 |
A device for relieving pressure in hydraulic lines, in particular in connecting lines that have coupling points (6, 8), are located between attachments and include hydraulically actuated actuators and working implements supplying the att...
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JP6599410B2 |
In a hydraulic control device, a state determination unit of a control unit determines whether a second pump is in a boosting operation or in a transition state. If the state determination unit has determined that the second pump is in t...
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JP6581499B2 |
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JP6579015B2 |
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JP6581444B2 |
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JP2019155935A |
To provide a vibration control device for a railway vehicle, which can protect a motor against an excessive load and improve riding comfort in the railway vehicle.A vibration control device 1 for a railway vehicle comprises: an actuator ...
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JP6576856B2 |
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JP6574066B2 |
Provided is a work machine hydraulic control system capable of detecting abnormality in a pump output power switching device independently of the abnormality state of the pump output power switching device.A hydraulic control system of a...
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JP2019148287A |
To provide a fluid supply device and a pressing apparatus capable of detecting abnormality highly precisely when the abnormality of a solenoid valve occurs, in the fluid supply device and the pressing apparatus provided with a pump drive...
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JP6565275B2 |
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JP6559047B2 |
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JP6556569B2 |
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JP6551296B2 |
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JP6527858B2 |
This disclosure includes manifolds, subsea valve modules, and related methods. Some manifolds and/or subsea valve modules include one or more inlets, each configured to receive hydraulic fluid from a fluid source, one or more outlets, ea...
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JP6525418B2 |
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JP6518379B2 |
A hydraulic energy regeneration system for a work machine for boosting a pressure of a return hydraulic fluid of a hydraulic cylinder and regenerating the hydraulic fluid, prevents a bottom pressure from reaching an overload relief set p...
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JP2019060453A |
To provide an abnormality detection device which can detect abnormality of a fluid pressure actuator.An abnormality detection device 1 of a fluid pressure actuator A includes a displacement detection part 2 which detects a displacement o...
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JP6497739B2 |
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JP6497738B2 |
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JP6495784B2 |
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JP6496631B2 |
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JP6496741B2 |
This disclosure relates to a truck-mounted concrete pump including a vehicle, a concrete distributor boom disposed on the vehicle and including multiple boom arms that can be stowed, in the form of an arm assembly, on a vehicle-mounted b...
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JP2019049335A |
To provide a construction machine capable of suppressing the unintended operation of a hydraulic actuator even when a double discharge type pump in a hydraulic closed circuit system is in trouble.A hydraulic closed circuit system 200 inc...
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JP6491084B2 |
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JP6484021B2 |
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JP6476702B2 |
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JP6470129B2 |
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JP6466825B2 |
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JP2019014591A |
To immediately prevent fall of a suspended load if an abnormal state arises in a command signal that controls the capacity of a motor in a work machine including a winch drum driven by a secondary control system.A crane comprises: a main...
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JP6456102B2 |
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JP6455191B2 |
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JP6453711B2 |
A hydraulic fluid energy regeneration system for a work machine capable of securely maintaining a brake pressure even when a solenoid valve or the like is erroneously rendered open by an electrical failure is provided. The hydraulic flui...
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JP6438312B2 |
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JP6427221B2 |
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JP2018179123A |
To provide a hydraulic motor mechanism for a construction machine which copes with an abnormal rise of pressure in a drain conduit, and can avoid serious situations such as the damage of a shaft seat of a hydraulic motor, a stop of the h...
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JP2018168977A |
To provide a hydraulic system including a first pump and a second pump in variable capacity type, capable of corresponding to failures or the like of an electromagnetic proportional valve at a low-cost configuration.A hydraulic system in...
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JP6406298B2 |
Provided is a monitoring apparatus configured to monitor the pressure state of a fluid in a target apparatus having a chamber in which at least one of compression and expansion of the fluid is performed. The monitoring apparatus includes...
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JP2018151009A |
To recover discharge pressure while ensuring a function of hydraulic equipment when discharge pressure of an oil pump decreases because of clogging and air entrainment of a strainer in an oil tank.When an absorption flow rate of an oil p...
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JP6396733B2 |
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JP6360824B2 |
Regeneration control is exercised and energy saving is realized even when an abnormality occurs to pressure sensors for hydraulic actuators. A work machine includes: a hydraulic pump (41b) that supplies a hydraulic fluid to a second hydr...
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JP6360344B2 |
To provide a water-wheel inlet valve control device capable of completely closing a main valve of a water-wheel inlet valve in safety when power supply is lost.A solenoid valve device 20 of a water-wheel inlet valve control device 1 in a...
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JP2018105763A |
To provide an abnormality determination method and an abnormality determination device for determining whether a supply state of compressed air is abnormal while an air pressure driving apparatus operates.The abnormality determination me...
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JP6346251B2 |
In order to detect a point of generation of oil leakage in a machine, an oil leakage detection device is provided with a state observation unit configured to acquire a change pattern of the flow rate of oil from log data recorded during ...
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JP6341384B2 |
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JP6324347B2 |
Disclosed is a hydraulic control system of a construction machine capable of achieving a reduction in meter-out pressure loss in accordance with variation of a negative load acting on a hydraulic actuator and capable of preventing deteri...
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JP6316776B2 |
A hydraulic drive system 100A for a work machine includes: a boom cylinder 4; an arm cylinder 8; a hydraulic pump device 51; a control valve 5; a regenerative device 61; a first operation device 41; a second operation device 42; a sensor...
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JP2018059521A |
To provide a pressure increasing device for a high lift work vehicle equipped with a hydraulic type crimp tool capable of holding a compression object without deformation.A booster apparatus 12 for a vehicle 1 for high lift work to feed ...
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JP6311080B1 |
In the filter state estimation system that estimates the state of the filter provided in the hydraulic circuit, the hydraulic circuit is provided in the filter, the bypass flow path through which oil flows by bypassing the filter, and th...
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