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JP2013238267A |
To provide a pneumatic operation device capable of supplying compression air of a normal pressure to pneumatic equipment even when the pressure of the compression air circulating through a compressed air line in a plant is lower than the...
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JP5340219B2 |
To provide a work machine including a means for supplying hydraulic oil from a first pump and a means for supplying hydraulic oil from the second pump in addition to the hydraulic oil from the first pump, which can surely prevent careles...
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JP5336558B2 |
To provide a method of controlling a variable displacement pump, in which a practically excellent hydraulic circuit can be constructed using a variable displacement pump and a closed center type directional valve and the pump can be oper...
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JP5330193B2 |
To provide a back pressure pressurizing valve improved in safety of a piston from seizure without complicating the structure. A first piston 3 and a second piston 4 are slidably housed in a case 2. Since the first piston 3 and the second...
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JP5320120B2 |
A multifunction relief valve 1 includes: a relief chamber 2 having an introduction port 7 and a relief port 8 for introducing and relieving pressure fluid; a back pressure chamber 3 formed on one end side of the relief chamber 2; a pisto...
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JP5309912B2 |
To provide a windlass switching the set pressure of a safety valve between the use of a chain drum and the use of a hawser drum. In the windlass 1, a chain drum 3 and a hawser drum 6 are connected to a hydraulic motor 4, the maximum pres...
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JP5304236B2 |
To stop swing motion by operating a swing brake when a gate lever is open-operated, that is, when a hydraulic locking works. An operation of the swing brake 12 which is a mechanical brake is delayed by a controller 33 and an electromagne...
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JP5295141B2 |
An apparatus for compensating for fluid contraction in a hydraulic powered telescoping boom (110) includes a monitor (200) determining the elevation angle of the telescoping boom, a supply of hydraulic fluid, and a fluid control responsi...
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JP5293009B2 |
To complete a filter regenerating action, and to surely prevent the abrupt actuation of an actuator. When a regeneration starting switch 15 is operated and it is determined that the regeneration of a filter is required, a high idle speed...
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JP5286156B2 |
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JP5279790B2 |
To provide a damper driving device capable of easily driving a damper by manual operation even when a solenoid valve falls into a poor operational performance owing to a disconnection of a control cable, etc. The damper driving device in...
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JP2013160382A |
To provide a hydraulic control device with improved safety for humans.A hydraulic control device includes a pump 4 having a pump regulator, and adjustable metering orifices 8a, 8b. The first metering orifice is arranged between a supply ...
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JP5265847B2 |
To provide a moving throttle valve capable of preventing the blockage of a circular clearance by dust in working fluid with a simple constitution. In this throttle valve 5 used in a fluid pressure circuit and comprising a throttle valve ...
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JP2013147049A |
To provide an aircraft actuator hydraulic system capable of driving an actuator even when a loss or degradation of the function of an airframe-side hydraulic power source, preventing decrease in airframe efficiency, while suppressing hea...
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JP5242659B2 |
Cutoff valve control apparatus capable of predicting a failure of devices therein with a failure diagnosis based on an operation test when the cutoff valve control apparatus is set. The cutoff valve control apparatus includes a judging d...
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JP5235938B2 |
Disclosed is an apparatus and method for mechanically reducing internal pressure of a column (202) in a refinery or petrochemical process, which uses a safety relay valve (201) for operating an emergency shutdown valve (204) able to mech...
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JP5227122B2 |
A double check valve having a floating function is disclosed, which can prevent construction equipment from overturning through intercepting of a floating function even if a signal pressure is fed to the double check valve to perform the...
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JP5221719B2 |
When an excitation of a servo motor is released due to an emergency stop, a power outage, or another operation performed on a positioning device, the positioning device uses air supplied from an air supply source to vary pressure of an a...
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JP5215338B2 |
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JP5206766B2 |
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JP5204150B2 |
Provided is a hybrid construction machine (construction machine using an electric motor for driving a swing structure) capable of performing satisfactory operations even when trouble disabling the electric motor from outputting torque ha...
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JP5201239B2 |
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JP5205467B2 |
A double valve having inlet, outlet, and exhaust ports maintains an outlet pressure below one percent of inlet pressure during a faulted state while maintaining a relatively small exhaust for reduced overall valve size. Crossover passage...
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JP2013515935A |
Apparatus to increase a force of an actuator having an override apparatus are described herein. An example fluid control system includes a first fluid control apparatus to fluidly couple a control fluid supply source to a control actuato...
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JP2013513768A |
A control system for a swashplate pump is disclosed. The control system may have a tiltable swashplate, at least one actuator movable to tilt the swashplate, a supply of pressurized fluid, and a drain. The control system may also have a ...
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JP5185349B2 |
Provided is a hybrid construction machine capable of letting the operator immediately stop the swing structure by performing a stopping operation for ordinary construction machines even when the swing structure moves differently from the...
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JP5160685B2 |
A control device for a quick-closing valve of a steam turbine including a relief valve for reducing a hydraulic pressure opening the quick-closing valve, and a relief valve control valve arrangement having at least three valves which are...
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JP5160289B2 |
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JP2013508647A |
A method for controlling a safety feature for a hydraulic machine is provided. The method includes detecting when at least control valve for a controller of an implement for the hydraulic machine is stuck in a position. An exhaust valve ...
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JP5141810B1 |
An oil-hydraulic unit includes a power module generating heat when energized. The power module is provided on the bottom surface of a recess facing hydraulic oil in a tank. Thus, the power module is cooled by the hydraulic oil in the tan...
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JP5134690B2 |
A servovalve includes a single motor which actuates separate valve members of separate servovalve assemblies. Each of the valve members controls the flow of hydraulic fluid from separate hydraulic fluid sources. In order to provide each ...
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JP5134051B2 |
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JP2013014914A |
To provide an emergency moving-down device for a movable cab, workable without pulling a high-pressure system hydraulic line into the cab and capable of avoiding such an event that the cab cannot be moved down because of a trouble of an ...
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JP5119845B2 |
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JP5117972B2 |
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JP5111946B2 |
To solve a problem wherein when an engine or a main hydraulic pump breaks down, iron wheel traveling becomes impossible and a road railer may be possibly stalled on the rail track. A hydraulic circuit for track traveling of a road railer...
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JP5109926B2 |
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JP5097115B2 |
A hydraulic power supply system (18) supplies hydraulic power to the hydraulic linear actuator (6) during normal operation. An autonomous hydraulic power supply system (16) supplies hydraulic power to the hydraulic linear actuator during...
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JP2012241900A |
To enhance reliability of operation, concerning a working machine, particularly a digger or a materials handling machine.A working machine having a movable part to be moved by at least one hydraulic drive cylinder, in particular, a digge...
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JP5081447B2 |
A hydraulic control arrangement is disclosed for the control of a consumer, comprising at least one mechanically operated continuously adjustable distribution valve with a subsequent LUDV pressure compensator down the line. In order to l...
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JP2012225391A |
To provide a hydraulic driving device for a working machine, which surely prevents behavior of a single rod double acting cylinder not intended by an operator, when the discharge pressure of a main pump is raised to elevate exhaust gas t...
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JP5071571B1 |
To protect an electric motor and a capacitor while ensuring a turning operation when an abnormality occurs in an electric system on the premise of a method in which an electric motor is connected to a hydraulic motor for turning and the ...
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JP5070913B2 |
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JP5074640B2 |
There is provided an abnormality determination unit that determines whether or not an output measurement unit is abnormal, in order to determine abnormality of the output measurement unit. When the output measurement unit is abnormal, th...
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JP5063571B2 |
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JP5058857B2 |
The device has control chambers (62, 64) of a cylinder (60) connected with usage outlets (U1, U2) of a hydraulic distributor (20) with low pressure or high pressure. Bearings (54, 56) of a slide (52) of an actuator e.g. fuel metering val...
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JP2012202423A |
To prevent human errors and reduce burdens on an operator, during inspection work for a pressure oil device or the like.During the patrol inspection work for the pressure oil device, opening and closing of an automatic drain valve 50 are...
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JP2012202433A |
To provide a work vehicle including a hydraulic device driving each portion by hydraulic fluid supplied from a hydraulic tank and achieving diagnosis of malfunctions of the whole hydraulic device with high accuracy.This work vehicle incl...
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JP5019283B2 |
A coupling frame formed at a connecting portion on an out-port side of a first safety valve, and a coupling frame formed at a connecting portion on an in-port side of a second safety valve are brought into contact with each other, direct...
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JP5015880B2 |
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