| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Hydraulic pressure control device for swing motor for construction machinery | US14374820 | 2013-01-07 | US09605693B2 | 2017-03-28 | Bongjin Lee; Hyunsik Lim; Yongho Tho; Kyungyong Shin |
| The present disclosure relates to a hydraulic pressure control device for a swing motor for construction machinery, and more particularly, to a hydraulic pressure control device for a swing motor for construction machinery, which supplements working fluid in the swing motor when a turning operation of an upper body of construction machinery is performed and then stopped. The hydraulic pressure control device for the swing motor for construction machinery according to the present disclosure including the aforementioned configuration may rapidly secure the amount of makeup fluid required by the swing motor when the swing motor is stopped by directly receiving the working fluid discharged from the hydraulic pump P, thereby improving durability of equipment and preventing a cavitation phenomenon. | ||||||
| 182 | Proportional directional control valve, and hydraulic circuit and hydropneumatic suspension system having such a valve | US14187650 | 2014-02-24 | US09505288B2 | 2016-11-29 | Wolfgang Bauer |
| The invention relates to a proportional directional control valve for controlling a hydraulic consumer, having a housing with a pressure port, a tank port, and first and second working ports. A control element is movably mounted in the housing. A single actuator is provided for moving the control element, which, in dependence on its position relative to the housing, enables different flow paths between the ports. The control element, starting from a first switching position in which both working ports are connected to the tank port, is movable by the actuator via a second switching position that follows the first switching position, to a third switching position that follows the second switching position. It is possible, by moving the control element from the first switching position into the third switching position, to successively disconnect the two working ports from the tank port and connect them to the pressure port. | ||||||
| 183 | Hydraulic circuit for controlling booms of construction equipment | US14006116 | 2011-04-19 | US09482214B2 | 2016-11-01 | Sung-Gon Kim |
| Disclosed is a hydraulic circuit for controlling booms of construction equipment, wherein working oil which is relieved from a large chamber of a boom cylinder passes through an orifice so as to prevent the boom from lowering if an overload is applied when the boom is not being operated. The hydraulic circuit for controlling booms of construction equipment includes: a boom cylinder which is connected to a hydraulic pump via a first path and a second path; a boom control valve which is mounted on the path between the hydraulic pump and the boom cylinder; a holding valve which is mounted between the boom control valve and the first path of the boom cylinder and prevents the natural lowering of a boom when the boom control valve is in a neutral position; a port relief valve which is mounted to the first path at the lower side of a holding poppet and relieves working oil when an overload is generated at the first path; and an orifice valve which is mounted at the lower side of the port relief valve, relieves the working oil which passes through the port relief valve when the boom control valve is neutral so as to relieve the working oil through an orifice, and discharges the working oil which passes through the port relief valve to a hydraulic tank at the time of conversion due to boom-up pilot signal pressure which is applied to the boom control valve. | ||||||
| 184 | VALVE DEVICE AND USE OF SUCH A VALVE DEVICE | US14442496 | 2013-11-13 | US20160273673A1 | 2016-09-22 | Peter Vincon |
| A valve device, comprising a valve tappet (18), which causes a controlled opening or blocking of a fluid flow channel (16) in an engagement position on a valve seat (22) and which can be brought from a starting position to the engagement position as a reaction to an application of pressure by means of a pressure fluid, wherein the pressure fluid is conveyed by electromagnetically driven pumping element (24) into a pressure chamber (44) associated with the valve tappet in such a way that the application of pressure for driving the valve tappet is accomplished by a plurality of pumping strokes of the pumping element, which has a conveying piston (26), in particular a reciprocating piston. | ||||||
| 185 | Latch Pin Assembly for Folding Wing Tip System | US14824858 | 2015-08-12 | US20160207608A1 | 2016-07-21 | Mark S. Good; Charles E. Jokisch |
| A folding wing tip system of an aircraft includes a latch pin actuator having a primary mechanical lock and a secondary hydraulic lock. The mechanical lock may include a lock cam movable between a lock position, in which the lock cam engages the latch pin, and an unlock position, in which the lock cam is disengaged from the latch pin, and a first lock actuator mechanically coupled to the lock cam and configured to provide a bias force pushing the lock cam toward the lock position. The hydraulic lock may be disposed in an unlatching hydraulic line and has an initial state, in which fluid flow through the unlatching hydraulic line is blocked thereby to hold the latch pin in the latched position, and an open state, in which fluid flow through the unlatching hydraulic line is permitted thereby to permit refraction of the latch pin to the unlatched position. | ||||||
| 186 | FLUID PRESSURE CONTROL APPARATUS | US14909753 | 2014-08-26 | US20160195111A1 | 2016-07-07 | Keiichi MATSUZAKI; Hideki MIYASHITA |
| A fluid pressure control apparatus includes a pilot control valve configured to control a pilot pressure guided from a pilot pump to the control valve and a load retaining mechanism installed in the main passage. The load retaining mechanism includes an operated check valve configured to permit a flow of the working fluid from the load-side pressure chamber to the control valve in accordance with a back pressure and a switch valve configured to switch an action of the operated check valve. The switch valve has a discharge position configured to discharge the working fluid in a back pressure chamber when the pilot pressure has been guided from the pilot control valve. When the switch valve is set to the discharge position, the working fluid in the back pressure chamber is discharged to a tank via a drain port of the pilot control valve. | ||||||
| 187 | Hydraulic valve device | US14057497 | 2013-10-18 | US09376787B2 | 2016-06-28 | Bo Andersson |
| A hydraulic valve device includes a first and a second engine port to a double acting hydraulic motor, a pump, a hand valve which has two open positions, wherein in the first open position the pump is fluidly connected to the first engine port and the tank is fluidly connected to the second engine port; and wherein in the second open position the pump is fluidly connected to the second engine port and the tank is fluidly connected to the first engine port, with a first nonreturn valve, arranged between the pump and second engine port. A piston which by way of the load pressure in the first engine port via a line governs the first nonreturn valve, and a second nonreturn valve arranged, as long as the hand valve is in its first open position, to connect the first engine port to the second engine port. | ||||||
| 188 | FLUID PRESSURE CONTROL DEVICE | US14384399 | 2013-03-25 | US20150096291A1 | 2015-04-09 | Tooru Takeuchi |
| A fluid pressure control device includes a switching valve that operates in conjunction with a control valve by a pilot pressure to switch an operation of an operated check valve. The switching valve includes a spool that moves according to the pilot pressure of a pilot chamber, and a piston that is accommodated in the pilot chamber and imparts a thrust force to the spool upon receiving the pilot pressure. The piston includes a first piston that is slidingly accommodated in the pilot chamber and is acted upon by the pilot pressure, and a second piston whose distal end faces the spool and is inserted into an accommodating hole formed in the first piston. A spherical protrusion is provided on a center of either one of a bottom surface of the accommodating hole of the first piston and a back surface of the second piston. | ||||||
| 189 | HYDRAULIC PRESSURE CONTROL DEVICE FOR SWING MOTOR FOR CONSTRUCTION MACHINERY | US14374820 | 2013-01-07 | US20150013318A1 | 2015-01-15 | Bongjin Lee; Hyunsik Lim; Yongho Tho; Kyungyong Shin |
| The present disclosure relates to a hydraulic pressure control device for a swing motor for construction machinery, and more particularly, to a hydraulic pressure control device for a swing motor for construction machinery, which supplements working fluid in the swing motor when a turning operation of an upper body of construction machinery is performed and then stopped. The hydraulic pressure control device for the swing motor for construction machinery according to the present disclosure including the aforementioned configuration may rapidly secure the amount of makeup fluid required by the swing motor when the swing motor is stopped by directly receiving the working fluid discharged from the hydraulic pump P, thereby improving durability of equipment and preventing a cavitation phenomenon. | ||||||
| 190 | Proportional directional control valve, and hydraulic circuit and hydropneumatic suspension system having such a valve | US14187650 | 2014-02-24 | US20140245732A1 | 2014-09-04 | Wolfgang Bauer |
| The invention relates to a proportional directional control valve for controlling a hydraulic consumer, having a housing with a pressure port, a tank port, and first and second working ports. A control element is movably mounted in the housing. A single actuator is provided for moving the control element, which, in dependence on its position relative to the housing, enables different flow paths between the ports. The control element, starting from a first switching position in which both working ports are connected to the tank port, is movable by the actuator via a second switching position that follows the first switching position, to a third switching position that follows the second switching position. It is possible, by moving the control element from the first switching position into the third switching position, to successively disconnect the two working ports from the tank port and connect them to the pressure port. | ||||||
| 191 | HYDRAULIC VALVE DEVICE | US14057497 | 2013-10-18 | US20140053543A1 | 2014-02-27 | Bo ANDERSSON |
| A hydraulic valve device includes a first and a second engine port to a double acting hydraulic motor, a pump, a hand valve which has two open positions, wherein in the first open position the pump is fluidly connected to the first engine port and the tank is fluidly connected to the second engine port; and wherein in the second open position the pump is fluidly connected to the second engine port and the tank is fluidly connected to the first engine port, with a first nonreturn valve, arranged between the pump and second engine port. A piston which by way of the load pressure in the first engine port via a line governs the first nonreturn valve, and a second nonreturn valve arranged, as long as the hand valve is in its first open position, to connect the first engine port to the second engine port. | ||||||
| 192 | HYDRAULIC CIRCUIT FOR CONTROLLING BOOMS OF CONSTRUCTION EQUIPMENT | US14006116 | 2011-04-19 | US20140010688A1 | 2014-01-09 | Sung-Gon Kim |
| Disclosed is a hydraulic circuit for controlling booms of construction equipment, wherein working oil which is relieved from a large chamber of a boom cylinder passes through an orifice so as to prevent the boom from lowering if an overload is applied when the boom is not being operated. The hydraulic circuit for controlling booms of construction equipment includes: a boom cylinder which is connected to a hydraulic pump via a first path and a second path; a boom control valve which is mounted on the path between the hydraulic pump and the boom cylinder; a holding valve which is mounted between the boom control valve and the first path of the boom cylinder and prevents the natural lowering of a boom when the boom control valve is in a neutral position; a port relief valve which is mounted to the first path at the lower side of a holding poppet and relieves working oil when an overload is generated at the first path; and an orifice valve which is mounted at the lower side of the port relief valve, relieves the working oil which passes through the port relief valve when the boom control valve is neutral so as to relieve the working oil through an orifice, and discharges the working oil which passes through the port relief valve to a hydraulic tank at the time of conversion due to boom-up pilot signal pressure which is applied to the boom control valve. | ||||||
| 193 | Method and hydraulic control system for supplying pressure medium to at least one hydraulic consumer | US12665593 | 2008-06-20 | US08499552B2 | 2013-08-06 | Wolfgang Kauss; Matthieu Desbois-Renaudin |
| The invention relates to a hydraulic control arrangement and to a method for controlling a hydraulic consumer that comprises a pressure chamber on the input side and on the return side, said pressure chamber being connected to an adjusting pump or a tank via a valve device. The valve device is controlled by means of a control unit via which it can be adjusted in a regeneration mode, in which both pressure chambers are connected to the adjusting pump. According to the invention, the adjusting pump is pressure controlled, whereby in the regeneration mode, it is automatically switched to the normal operation in which the supply side of the pressure chamber is connected to the adjusting pump and the return side of the pressure chamber is connected to the tank when the pumping rate falls below the demand for the pressure medium. | ||||||
| 194 | Load holding for meterless control of actuators | US13088999 | 2011-04-18 | US20120260642A1 | 2012-10-18 | Patrick Opdenbosch; Joshua Dierking |
| First and second mechanical hydraulic valves are disposed between a pump and the cap side chamber of an actuator and the pump and the rod chamber of the pump. The first and second valves are actuated as a result of respective pressure differentials applied across the valves. A controller controls flow from a pump in response to a commanded motion to control movement of the actuator, and cause the valves to open. The valves are disposed in their no-flow positions when the pump is not operative, and when the hydraulic system of off or locked out to hold a load. | ||||||
| 195 | Hydraulic control apparatus | US11667054 | 2005-11-08 | US08042451B2 | 2011-10-25 | Takeharu Matsuzaki; Shigeto Nakajima |
| A hydraulic control apparatus 1 includes a switch valve 11, an adjustment valve 12, and a valve control device 13. The adjustment valve 12 has a fluid chamber 15, a valve body 14, and a back pressure chamber 17. A restrictor is formed between the valve body 14 and a wall defining the fluid chamber 15 and connects the cylinder line 32 to the switch valve line 33. The opening degree of the restrictor changes in correspondence with movement of the valve body 14. When the switch valve 11 is located at a neutral position or a supply position, the valve control device 13 applies the fluid pressure in the cylinder line 32 to the back pressure chamber 17. When the switch valve 11 is located at a drainage position, the valve control device 13 applies a pilot pressure lower than the fluid pressure in the cylinder line 32 to the back pressure chamber 17. | ||||||
| 196 | Device for piloting by means of a substantially incompressible fluid | US12929060 | 2010-12-28 | US20110162744A1 | 2011-07-07 | Graziano Levoni; Imer Iori |
| A device for piloting by means of a substantially incompressible fluid, comprising a two-way flow control valve which operates along a piloting line and has at least one first port and one second port, which are adapted to be connected, respectively, to elements for supplying a substantially incompressible fluid under pressure and to a fluid-operated element to be piloted by the piloting line and choke elements arranged in parallel to the flow control valve along a bypass duct which is closed in a loop on the piloting line, the flow control valve being actuated for closing by the pressure at the second port, the calibration pressure value at which the flow control valve closes being at most equal to the actuation pressure value of the element to be piloted. | ||||||
| 197 | HYDRAULIC VALVE DEVICE | US12733705 | 2008-09-17 | US20100206413A1 | 2010-08-19 | Winfried Rüb |
| The invention relates to a hydraulic valve device, especially in the form of at least one load sensing valve, comprising a valve housing (10), a control slide (12) arranged in a longitudinally mobile manner and used to control a fluid connection arrangement (14) comprising a plurality of connection points, at least one control pressure line (PST), and at least one supply pressure line (Y). At least for a load sensing connection (LS), a pocket-type channel (18) is arranged between the valve housing (10) and the control slide (12), for a control pressure line (PST) and a supply pressure line (Y), and this enables the already available ring channel of the load sensing message chain to also be used on an axial point of the control slide axle of, thereby reducing cost and space. | ||||||
| 198 | Fluid Pressure Drive Unit and Snow Removal Unit | US12604401 | 2009-10-23 | US20100101120A1 | 2010-04-29 | Osamu Sato; Yoshitake Sakai; Shiro Nishioka |
| There is provided a fluid pressure drive unit that can fulfill a position holding function stably even when an external force acts during the time when the position is held, the unit being used, for example, for the right and left angle adjustment of a snow plow blade. There is provided a first excessive load relief valve 6 for letting a working fluid escape from a bottom-side pipe line 10a, which connects the bottom-side port of a single-rod double acting cylinder 2 to the bottom side of an operate check valve 4, to a rod-side pipe line 10b, which connects the rod-side port of the single-rod double acting cylinder 2 to the rod side of the operate check valve 4, and there is provided a second excessive load relief valve 7 for letting the working fluid escape from the rod-side pipe line 10b to a tank 3. Also, there is provided a negative pressure preventing check valve 8 for allowing the working fluid to flow into the bottom-side pipeline 10a from the tank 3. | ||||||
| 199 | VALVE BLEED SYSTEM | US12256190 | 2008-10-22 | US20100096576A1 | 2010-04-22 | Mark Sommer; Phil Roe; Derek Eagles; Paul Seeber |
| A valve control unit is connected to a control valve and automatically moves a valve spool first and second bleed positions. The control unit prevents valve bleed if the control valve is in its extend or retract position under command of the operator. The control unit prevents a valve bleed if a temperature of oil in the reservoir is not less than a reference temperature. The control unit prevents a valve bleed if a speed of the vehicle is less than a reference speed. The control unit automatically returns the spool to its neutral position from the first and second bleed positions. | ||||||
| 200 | Control device for a work device comprising a scoop held on an extension arm | US10538697 | 2003-12-08 | US07607381B2 | 2009-10-27 | Wolfgang Kauss; Frederic Lamarche |
| On a work appliance, an extension arm is held rotatably, and a scoop is held rotatably on the extension arm. Actuation of the extension arm and of the scoop is by means of hydraulic cylinders. Each cylinder is assigned a valve which controls the flow of pressure medium from a pump to the cylinder and from the latter to the tank. A rotational movement of the extension arm is accomplished with the top edge of the scoop maintaining its angular position when the extension arm is being raised or lowered. Valves which control the flow of pressure medium to the cylinders are activated with the ratio of the pressure medium quantities supplied to the cylinders being kept at a constant value independently of the size of the control signal controlling the flow of pressure medium to a cylinder for the actuation of the extension arm. | ||||||
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