| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Boom cylinder control circuit for construction machine | US14369535 | 2012-12-18 | US09651064B2 | 2017-05-16 | Won Sun Sohn |
| The present disclosure relates to a boom cylinder control circuit for a construction machine, and includes: a boom cylinder which has an ascending-side chamber and a descending-side chamber; a boom control unit which provides a working fluid to the boom cylinder; a boom operation part which is operated to drive the boom cylinder by providing a pilot working fluid to the boom control unit; a first floating valve which allows the descending-side chamber and the ascending-side chamber to selectively communicate with or be shut off from a first drain line; a second floating valve which is additionally provided in a flow path between the descending-side chamber, which is connected with the first drain line via the first floating valve, and the first drain line, allows the descending-side chamber to communicate with the first drain line, or shut off discharge of the working fluid from the descending-side chamber to the first drain line, and allows of a reverse flow; and a floating selection operation part which provides an operation signal so that the first floating valve and the second floating valve are switched in a direction in which the first floating valve and the second floating valve are communicated or shut off. | ||||||
| 162 | Hydraulic actuator | US14031845 | 2013-09-19 | US09528532B2 | 2016-12-27 | William Davis Simmons |
| A hydraulic actuator includes a hollow tube that has a first opening at a first end of the hollow tube and that has a second opening at a second end of the hollow tube. The hollow tube contains hydraulic fluid. A moveable magnet moves within hollow tube as a result of a magnetic field within the hollow tube. A magnetic field source located outside the hollow tube creates the magnetic field within the hollow tube. When the moveable magnet moves to the first end of the hollow tube, a first piston pushes hydraulic fluid out of the first opening. When the moveable magnet moves to the second end of the hollow tube a second piston pushes hydraulic fluid out of the second opening. | ||||||
| 163 | Hydraulic transmission circuit with multiple capacities | US13742511 | 2013-01-16 | US09512859B2 | 2016-12-06 | Clement Recoura; Guillaume Charrier |
| A hydraulic transmission circuit comprising three or four coupled hydraulic elementary motors, each elementary motor having a first and a second secondary enclosure. The circuit includes four distribution valves for which the respective outlet channels may be selectively connected to two main conduits for supplying fluid to and discharging fluid from the circuit. The outlet channels of the first and second valves are connected to at least one of the first secondary enclosures; those of the third and fourth valves are connected to at least one of the second secondary enclosures. Each of the elementary motors has a first secondary enclosure connected to a single valve from among the first or second valve and a second secondary enclosure connected to a single valve from among the third or fourth valve. The valve pairs thereby connected to said elementary motors respectively, are all distinct, two by two. | ||||||
| 164 | Work machine | US14239361 | 2012-12-11 | US09377034B2 | 2016-06-28 | Hiroshi Horii |
| Provided is a load sensing system for controlling a discharge pressure of the hydraulic pump so as to render a differential pressure obtained by subtracting a maximum load pressure among the hydraulic actuators from a discharge pressure of the hydraulic pump to be a constant pressure, and there are provided: a first load pressure flow passage which introduces load pressures of the hydraulic actuators to be outputted to a PLS transmission line which transmits the maximum load pressure among the hydraulic actuators at the time of activating the hydraulic actuators; and a second load pressure flow passage which is a flow path for introducing the load pressures of the hydraulic actuators to be outputted to the PLS transmission line during operation after activations of the hydraulic actuators, and wherein a flow rate of the pressure oil therein is reduced than that in the first load pressure flow passage. | ||||||
| 165 | Method for operating a hydraulic system and brake system | US14382831 | 2013-02-28 | US09321445B2 | 2016-04-26 | Harald Biller |
| A method for operating a hydraulic system with a plurality of consumers an electrically controllable pressure supply device and an electrically actuable inlet valve, per consumer, which inlet valve is arranged between the pressure supply device and the consumer, wherein a pressure/volume relationship is predefined or determined for each consumer, wherein each consumer is assigned to a first group or a second group of consumers, wherein the first group of consumers includes at least one consumer, and wherein, in order to set predefined consumer-specific setpoint pressures, the first group of consumers is connected via the respectively opened inlet valve to the pressure supply device, and the inlet valves of the consumers of the second group are closed, wherein the inlet valve of a single, selected consumer of the second group is opened while being regulated to build up a pressure, and a brake system for motor vehicles. | ||||||
| 166 | Hydrostatic drive | US13666205 | 2012-11-01 | US09266420B2 | 2016-02-23 | Iain Edward |
| A hydrostatic drive includes a hydraulic pump configured to drive at least two hydraulic motors. The hydraulic motors each include an inlet side and an outlet side. The hydraulic motors are each connected on the inlet side to a respective outlet of a flow divider, which is arranged downstream of the hydraulic pump. The hydraulic motors are each connected on the outlet side to a respective inlet of a flow divider, which is arranged upstream of the hydraulic pump. | ||||||
| 167 | Multi-wheel drive system and method of control | US14198745 | 2014-03-06 | US09062767B1 | 2015-06-23 | Todd R. Ekonen |
| A multi-wheel drive system for a vehicle and a method of control. The system may include first and second inlet valves that may control the flow of fluid to a gerotor pump that may actuate a clutch to provide torque to a wheel set. | ||||||
| 168 | HYDRAULIC HYBRID SWING DRIVE SYSTEM FOR EXCAVATORS | US14370795 | 2013-01-04 | US20140373522A1 | 2014-12-25 | Jeff Cullman; Hao Zhang; Richard D. Kimpel; Zhesheng Jiang; Raymond Collett; Bogdan Kozul |
| A swing drive system (11) for an excavator is provided which utilizes a prime mover (20) mechanically connected to a first hydraulic pump/motor (30) and a second hydraulic pump/motor (32) mechanically connected to a swing mechanism (70). The system includes a hydraulic circuit (31) connecting a hydraulic fluid reservoir (42), a hydraulic accumulator (40), the first hydraulic pump/motor (30), and the second hydraulic pump/motor (32). The system is operable in one mode where the second hydraulic pump/motor acts as a pump to retard movement of the swing mechanism and pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator. The system is operable in another mode where the pressurized fluid from the hydraulic accumulator is used to assist the prime mover in driving hydraulic consumers (62,64,66), including the swing mechanism. | ||||||
| 169 | Hydraulic system | US13278935 | 2011-10-21 | US08893490B2 | 2014-11-25 | Michael L. Knussman; Brad A. Edler; Patrick Opdenbosch |
| A method of controlling a hydraulic system includes providing fluid to a first actuator with a first pump via a first closed-loop circuit of a machine, and providing fluid to a second actuator with a second pump via a second closed-loop circuit of the machine. The method also includes providing fluid to a third actuator with a third pump via a third closed-loop circuit of the machine, and providing fluid to a fourth actuator with a fourth pump via a fourth closed-loop circuit of the machine. The method further includes forming a combined flow of fluid including fluid from the first circuit and fluid from at least one of the second, third, and fourth circuits, and directing the combined flow to the first actuator while providing fluid to the actuator of the at least one of the second, third, and fourth circuits. | ||||||
| 170 | Hydraulic wheel drive system with selectively actuated motor | US13573263 | 2012-09-06 | US08813487B1 | 2014-08-26 | Keith M. Mears; James E. Smith; Brad A. Meyerholtz |
| A hydraulic circuit for a vehicle includes a first loop that includes, in serial order, a first hydraulic pump, a first hydraulic line, a hydraulic motor and a second hydraulic line. A second hydraulic pump and a third valve control low pressure fluid from the second pump to the hydraulic motor casing. The low pressure fluid through the third valve maintains the motor pistons retracted when the motor is not being used. For actuating the motor, the third valve is actuated for disconnecting the second pump and relieving pressure from the motor casing. Low pressure is then provided to the first and second lines for extending the motor pistons. The first and second valves are then actuated for isolating the first and second lines from one another, and the first pump is used to power the motor. The first, second and third valves are advantageously solenoid cartridge valves. | ||||||
| 171 | WORK MACHINE | US14239361 | 2012-12-11 | US20140208734A1 | 2014-07-31 | Hiroshi Horii |
| Provided is a load sensing system for controlling a discharge pressure of the hydraulic pump so as to render a differential pressure obtained by subtracting a maximum load pressure among the hydraulic actuators from a discharge pressure of the hydraulic pump to be a constant pressure, and there are provided: a first load pressure flow passage which introduces load pressures of the hydraulic actuators to be outputted to a PLS transmission line which transmits the maximum load pressure among the hydraulic actuators at the time of activating the hydraulic actuators; and a second load pressure flow passage which is a flow path for introducing the load pressures of the hydraulic actuators to be outputted to the PLS transmission line during operation after activations of the hydraulic actuators, and wherein a flow rate of the pressure oil therein is reduced than that in the first load pressure flow passage. | ||||||
| 172 | MULTIPLE FUNCTION HYDRAULIC SYSTEM WITH A VARIABLE DISPLACEMENT PUMP AND A HYDROSTATIC PUMP-MOTOR | US14004783 | 2012-03-15 | US20140060032A1 | 2014-03-06 | Joseph L. Pfaff; Eric P. Hamkins |
| A hydraulic system includes a first pump and a plurality of valves that control fluid flow from the first pump to several actuators. Variable source orifices in the control valves are connected in parallel between the first pump and a node, and variable bypass orifices in the control valves are connected in series between the node and a tank. Pressure at the node controls displacement of the first pump. Each control valve also has a metering orifice for varying fluid flow between the node and one of the actuators. A hydrostatic pump-motor, coupled between two ports of a given actuator, is driven in a motoring mode by fluid exiting one of those ports. In a pumping mode, the hydrostatic pump-motor forces lower pressure fluid exhausting from one port into the other port of the given actuator. | ||||||
| 173 | INDEPENDENT BLADE CONTROL SYSTEM WITH HYDRAULIC CYCLIC CONTROL | US13565597 | 2012-08-02 | US20140034779A1 | 2014-02-06 | Carlos A. Fenny |
| According to one embodiment, a radial fluid device includes a cylinder block having a plurality of radially extending cylinders, a plurality of pistons, and a cam disposed about the plurality of radially extending cylinders. A first linear control is coupled to the cam and operable to reposition the cam along a first axis. A second linear control is coupled to the cam and operable to reposition the cam along a second axis. A third linear control is coupled to the cam and operable to resist movement of the cam along a third axis. | ||||||
| 174 | Hydrostatic Drive | US13666205 | 2012-11-01 | US20130111893A1 | 2013-05-09 | Iain Edward |
| A hydrostatic drive includes a hydraulic pump configured to drive at least two hydraulic motors. The hydraulic motors each include an inlet side and an outlet side. The hydraulic motors are each connected on the inlet side to a respective outlet of a flow divider, which is arranged downstream of the hydraulic pump. The hydraulic motors are each connected on the outlet side to a respective inlet of a flow divider, which is arranged upstream of the hydraulic pump. | ||||||
| 175 | Hydraulic System | US13278935 | 2011-10-21 | US20130098017A1 | 2013-04-25 | Michael L. Knussman; Brad A. Edler; Patrick Opdenbosh |
| A method of controlling a hydraulic system includes providing fluid to a first actuator with a first pump via a first closed-loop circuit of a machine, and providing fluid to a second actuator with a second pump via a second closed-loop circuit of the machine. The method also includes providing fluid to a third actuator with a third pump via a third closed-loop circuit of the machine, and providing fluid to a fourth actuator with a fourth pump via a fourth closed-loop circuit of the machine. The method further includes forming a combined flow of fluid including fluid from the first circuit and fluid from at least one of the second, third, and fourth circuits, and directing the combined flow to the first actuator while providing fluid to the actuator of the at least one of the second, third, and fourth circuits. | ||||||
| 176 | Closed-Loop Hydraulic System Having Priority-Based Sharing | US13278479 | 2011-10-21 | US20130098010A1 | 2013-04-25 | Brad A. Edler; Jeffrey L. Kuehn; Jeremy T. Peterson; Michael T. Verkuilen |
| A hydraulic system is disclosed having first, second, and third pumps. The hydraulic system may also have a first actuator connected to the first pump in closed-loop manner, a second actuator connected to the second pump in closed-loop manner, and a third actuator. The hydraulic system may further have a selector valve associated with the third pump, and a first switching valve associated with the third pump and the third actuator. The first switching valve may be movable between a first position at which the third pump is connected to the third actuator in a closed-loop manner to move the third actuator in a first direction, a second position at which the third pump is connected to the third actuator in a closed-loop manner to move the third actuator in a second direction, and a third position at which the third pump is connected to the selector valve. | ||||||
| 177 | SYSTEM FOR ALLOCATING FLUID FROM MULTIPLE PUMPS TO A PLURALITY OF HYDRAULIC FUNCTIONS ON A PRIORITY BASIS | US13420851 | 2012-03-15 | US20120233996A1 | 2012-09-20 | Corey K. Quinnell; Joseph L. Pfaff; Jonathan M. Starkey; Eric P. Hamkins |
| A valve assembly has a flow summation node coupled to a displacement control port of the first pump. Each valve in the assembly has a variable metering orifice controlling flow from an inlet to a hydraulic actuator and has a variable source orifice conveying fluid from a supply conduit to a flow summation node. The source orifice enlarges as the metering orifice shrinks. Each valve includes a variable bypass orifice and the bypass orifices of all the control valves are connected in series forming a bypass passage between a bypass node and a tank. The bypass node is coupled to the flow summation node and receives fluid from a second pump. At each valve, a source check valve conveys fluid from the supply conduit to the inlet and a bypass supply check valve conveys fluid from the bypass passage to the inlet. | ||||||
| 178 | Fluid transmission | US12065203 | 2006-09-04 | US08220260B2 | 2012-07-17 | Martin Russell Harris |
| A fluid transmission that employs a fluid to transmit a force, comprising a conduit for the fluid made from heat shrink polymer tubing, wherein at least a portion of the heat shrink polymer tubing is shrunken, whereby the force can be transmitted by the fluid from a first or proximal end of the conduit to a second or distal end of the conduit. Also, an actuator and methods for manufacturing the transmission and actuator. | ||||||
| 179 | Device for controlling the steering of a commercial vehicle, and vehicle comprising one such device | US11917696 | 2005-06-14 | US08061469B2 | 2011-11-22 | Gilles Florean |
| The disclosed device controls the steering of a commercial vehicle and comprises front wheels that can be oriented according to a first turning angle by a first actuator, rear wheels oriented according to a second turning angle by a second actuator, and a power circuit with a pressurized fluid source and power components that transmit hydraulic power to the actuators. The power components are controllable to configure the power circuit according to coupling modes between the front and rear wheels. The device includes a control circuit containing a power source and control components that are electrically controlled by an electrical control unit and transmit hydraulic commands relating to one of the determined coupling modes to the power components. The control components are hydraulically connected such that in the event of a fault in the electrical control, the commands permanently maintain the power circuit in the current coupling mode. | ||||||
| 180 | Control and adjustment system for a lifting and tilting mechanism of a working tool in a mobile machine | US10564690 | 2004-05-19 | US20070175210A1 | 2007-08-02 | Jochen Beck; Dieter Roth; Ulrich Heinz |
| The invention relates to a control and adjustment system for a lifting mechanism (100) of a loading blade (6) in a mobile machine tool. Said lifting mechanism is made up of at least one first and second blade cylinder (1, 2), at least one first and second lifting cylinder (61, 62) and one first and second hydropump (15, 75) which can be adjusted with regard to the pump volume. The adjusting pistons (3, 5) which can be displaced in the first and second blade cylinders (1, 2), respectively, separate both blade cylinders (1, 2) into two adjusting pressure chambers (7 and 8, 9 and 10). The adjusting pistons (63, 65) which can be displaced in the two lifting cylinders (61, 62) respectively separate the two lifting cylinders (61, 62) into the two adjusting pressure chambers (67 and 68, 69 and 70) in an analogous manner. In a first closed hydraulic circuit, a first and the second connection (14, 17) of the first hydropump (15) is, respectively made to the piston side of the piston pressure chamber (7, 9) of one blade cylinder (1, 2) and to the piston rod side of the adjusting pressure chamber (10, 8) of the other blade cylinder (2, 1). The first and second connection (74, 77) of the second hydropump (75) is respectively made in a second closed hydraulic circuit to a piston side adjusting pressure chamber (70, 67) of a lifting cylinder (62, 61) and to the piston rod side of the adjusting pressure chamber (68, 69) of the other lifting cylinder (61, 62). | ||||||
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