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The Quarterly Review ; March edition, 1825
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| Number | Title | Issue Date |
| 8146355 | Traveling device for crawler type heavy equipment A traveling device for crawler type heavy equipment is provided, which can improve manipulability by preventing an abrupt decrease/increase of a traveling speed of the equipment when a combined operation, in which a left/right traveling device and a working device a... | 04/03/2012 |
| 8104276 | Hydraulic circuit to prevent bucket separation from bucket rest during traveling of heavy equipment A hydraulic circuit for preventing a change of stroke of a boom cylinder or an arm cylinder during transportation. The hydraulic circuit includes first and second hydraulic pumps, a boom cylinder, an arm cylinder, a boom confluence logic valve, a first port connecte... | 01/31/2012 |
| 7992384 | Hydraulic control device of construction machinery A hydraulic control device of construction machinery is disclosed. The device includes a main merging/diverging valve, operating levers operated to actuate plural actuators, an operating condition judging section, and a pattern collating section. When a load pressur... | 08/09/2011 |
| 7954315 | Hydraulic circuit structure of work vehicle A hydraulic circuit structure of a work vehicle capable of solving a problem in a conventional structure wherein, in a machine attitude control in back hoe operation, pressure oil is preferentially fed to light-loaded machines and some work machines are slowly moved... | 06/07/2011 |
| 7921641 | Arrangement and method for delivering hydraulic fluid in a work vehicle An arrangement for delivering hydraulic fluid to at least one hydraulic actuator of a work vehicle for moving a work implement and/or steering the vehicle includes at least two pumps which are adapted to be operatively driven by a power source and adapted to operati... | 04/12/2011 |
| 7841175 | Hydraulic circuit for construction equipment A hydraulic circuit for construction equipment is disclosed, which can prevent an abrupt rotation of a swing device when a switching valve for the swing device is shifted in a state that switching valves for a traveling device and a working device have been shifted.... | 11/30/2010 |
| 7743611 | Backhoe hydraulic system The present invention overcomes drawbacks whereby the supply of pressure oil to a hydraulic cylinder for operating a ground working device is temporarily cut, and operation of the ground working device is temporarily stopped when a control valve for the travel devic... | 06/29/2010 |
| 7614225 | Straight traveling hydraulic circuit A straight traveling hydraulic circuit is provided. In case of performing a combined operation in which a fine operation of a working device and a fine traveling of a traveling device are simultaneously required, the straight traveling hydraulic circuit can allow th... | 11/10/2009 |
| 7594395 | Hydraulic control device for working machine A hydraulic control device for a working machine includes control valves; hydraulic actuators controlled by corresponding control valves and divided into groups; unified bleed-off valves disposed on discharge lines of first and second hydraulic pumps; central bypass... | 09/29/2009 |
| 7581392 | Straight traveling hydraulic circuit A straight traveling hydraulic circuit is disclosed, which, in the case of performing a combined operation in which working and traveling devices are simultaneously driven, can prevent a declination of equipment due to an overload of the working devices. A straight ... | 09/01/2009 |
| 7530225 | Apparatus for increasing operation speed of boom on excavators An apparatus for increasing an operation speed of a boom on excavators is disclosed, which enables an unskilled operator to conveniently manipulate a working device by decreasing a rotation speed and increasing a lifting speed relatively when the excavator performs ... | 05/12/2009 |
| 7520130 | Hydraulic pressure control device of construction machine A hydraulic pressure control device of a construction machine enabling an increase in operability and working efficiency by suppressing a fluctuation in flow rates occurring before and after the switching of a merging-separating valve, in energy efficiency by accura... | 04/21/2009 |
| 7500360 | Hydraulic driving system of construction machinery A hydraulic drive system comprises directional flow control valves (10a-f) for selectively supplying a hydraulic fluid from a first hydraulic pump (1a, 1b), inflow control valves (201-203) disposed respe... | 03/10/2009 |
| 7497080 | Hydraulic controlling device of working machine A hydraulic controlling device in which, when performing a combined operational process, a position of a straight travel valve is switched to a straight travel position to drive both a travel motor and a working actuator by separate pumps. In this case, to prevent a... | 03/03/2009 |
| 7478531 | Hydraulic circuit for heavy construction equipment A hydraulic circuit for heavy construction equipment to reduce a speed of a swing apparatus while a working apparatus such as a boom is concurrently operated has a work control valve which controls a working apparatus cylinder; a confluence valve which combines a hy... | 01/20/2009 |
| 7412826 | Hydraulic system for work vehicle The hydraulic system for a work vehicle includes a main hydraulic pump, a main supply circuit through which pressurized oil from the main hydraulic pump flows, a sub hydraulic pump, and a sub supply circuit through which pressurized oil from the sub hydraulic pump f... | 08/19/2008 |
| 7360357 | Hydraulic steering system with input horsepower limiting circuit and increased fan speeds at low engine RPM A hydraulic system that provides hydraulic fluid to a power steering system of a vehicle at a substantially constant flow rate and can also divert excess hydraulic fluid to the air cooling fan of an associated vehicle at low engine speeds is disclosed. The resulting... | 04/22/2008 |
| 7356991 | Hydraulic control device of an excavator with improved loading performance on a slope A hydraulic control device of an excavator is provided for controlling combined operation of boom-raising and swing on a slope. A swing priority valve (20) is provided on a pressured fluid supply line (8) that connects a first hydraulic pump (1)... | 04/15/2008 |
| 7350353 | Hydraulic circuit To provide a hydraulic circuit with a compact and simple structure while securing the amount of a hydraulic oil necessary for right and left running motors so as to prevent the limitation of a running speed. A first system has a changing valve for a right side runni... | 04/01/2008 |
| 7337563 | Work vehicle having improved mounting structure of control valve unit A work vehicle includes a traveling vehicle, a backhoe having a base frame detachably connected to a rear portion of the traveling vehicle and an excavator detachably attached to a rear portion of the base frame. The base frame includes a pair of upper and lower bas... | 03/04/2008 |
| 7322800 | System and method of providing hydraulic pressure for mechanical work from an engine lubricating system The method provides hydraulic pressure for mechanical work from an engine lubricating system in an internal combustion engine by supplying oil to an engine lubrication gallery for lubricating the engine and to at least one variable oil demand accessory. Each of the ... | 01/29/2008 |
| 7320216 | Hydraulic system having pressure compensated bypass The present disclosure is directed to a hydraulic system. The system includes a first source of pressurized fluid and at least one fluid actuator. The system also includes a first valve disposed between the first source and the at least one fluid actuator being conf... | 01/22/2008 |
| 7316111 | Multi-purpose hydraulic system A hydraulic system including a first pump, a second pump, an auxiliary passage, and a supplemental apparatus. The first pump is in fluid communication with a first valve, and the second pump is in fluid communication with a second valve. The auxiliary passage is in ... | 01/08/2008 |
| 7251934 | Work vehicle hydraulic system A hybrid hydraulic system for a work vehicle is provided that includes a first fixed displacement hydraulic pump whose outlet is connected to a priority valve. The priority valve, in turn, directs the pump's flow to a first group of closed center backhoe valves on a... | 08/07/2007 |
| 7197872 | Hydraulic circuit in work vehicle A hydraulic circuit includes a control valve that controls flow of pressure oil from a hydraulic source to work hydraulic cylinders, an operating device that issues a command for drive of the control valve, valve devices each comprising a check valve, each provided ... | 04/03/2007 |
| 7181322 | Ammunition loading vehicle and method A motorized hydraulically-operated and driven aircraft loading vehicle is particularly suited for the loading of bombs, which are raised by a pair of hydraulically-operated arms. Vehicle has two selectable operation modes. A first, working mode provides four-wheel h... | 02/20/2007 |
| 7178333 | Hydraulic control system for hydraulic excavator A hydraulic control system for a hydraulic excavator of the present invention comprises a boom control valve in a first oil path for providing pressure oil from a first hydraulic pump with a boom cylinder according to operation of a boom operating means, an arm cont... | 02/20/2007 |
| 7174711 | Hydraulic control system and construction machine A hydraulic control system of the present invention comprising control valves for controlling the direction and flow rate of pressure oil discharged from a hydraulic pump, hydraulic actuators which the pressure oil is fed to and controlled by the control valves, the... | 02/13/2007 |
| 7174710 | Nelson flywheel power plant improvement An improvement to the Nelson Flywheel Power Plant comprising a piston (100 and 101) in each outer chamber (40 and 41) situated at the interface of the compressible fluid and incompressible fluid (120) and slidably adjoining the cen... | 02/13/2007 |
| 7174826 | Hydraulic crowd control mechanism for a mining shovel A crowd control mechanism for a power shovel includes an extendible dipper handle having an extended position and a retracted position. A double acting hydraulic cylinder having a an extendible ram has one of the cylinder and the ram fixed to the dipper handle and t... | 02/13/2007 |
| 7168246 | Hydraulic control device for working machine A hydraulic control device for a working machine includes hydraulic actuators, a hydraulic pump which functions as a hydraulic power source, control valves which control the actuators on the basis of operations by an operating unit, a common bleed-off valve which re... | 01/30/2007 |
| 7155908 | Hydraulic system for heavy equipment option apparatus The present invention is directed to controlling an operation oil supplied to an option apparatus without changing a design of a control valve assembly which controls an operation oil supplied to a traveling motor, etc. when additionally engaging an option apparatus... | 01/02/2007 |
| 7146808 | Hydraulic system having priority based flow control A hydraulic system has a source, a plurality of fluid actuators, and a controller. The controller is configured to receive an input indicative of which of the plurality of fluid actuators are a first and a second type of fluid actuator, to receive an input indicativ... | 12/12/2006 |
| 7134563 | Crane with manual input devices The invention relates to a crane that comprises an electronic control for actuating drives for at least one lifting gear and for crane movements, which can be operated by an operator via manual input devices. Said manual input devices can be adjusted as regards thei... | 11/14/2006 |
| 7132053 | Protective device for the chromatographic bed in dynamic axial compression chromatographic columns The invention concerns a chromatographic device including a column (12) for receiving a chromatographic bed (14) through which flow a first fluid; a piston (36) sliding inside the column (12) an exerting pressure on the bed (14), a... | 11/07/2006 |
| 7127887 | Oil pressure circuit for working machines A joining directional control valve 13 is disposed to supply, to an arm cylinder 4, not only a hydraulic fluid delivered from a first hydraulic pump 1, but also a hydraulic fluid delivered from a second hydraulic pump 2 when an arm direct... | 10/31/2006 |
| 7114747 | Work vehicle stabilizer A system for automatically moving a stabilizer of a work vehicle is disclosed. A joystick is connected to an electronic controller, which in turn, is connected to valve drivers to drive stabilizer raising and lowering valves. In one mode of operation, the controller... | 10/03/2006 |
| 7093433 | Laying apparatus for cables, lines, conductors or suchlike, and relative laying method Laying apparatus and method for cables, lines, conductors or suchlike. The apparatus comprises at least a hydraulic circuit provided with a variable delivery feed pump and with a motor connected to the feed pump in order to drive laying members for the cables and su... | 08/22/2006 |
| 7076896 | Control for an operating arm of an earthmoving vehicle An earthmoving vehicle has an operating arm that is raised and lowered by a hydraulic system. The hydraulic system includes a drain line and at least one actuator connected to the operating arm. The actuator defines a variable-volume chamber connectable to the drain... | 07/18/2006 |
| 7076947 | Hydraulic circuit of construction machinery To keep one of three hydraulic pumps unaffected by variations in torque of the remaining hydraulic pumps when the three hydraulic pumps are used, displacements of the first and second hydraulic pumps are controlled based on their own delivery pressures P1, P | 07/18/2006 |
