| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 060484000 | Having plural energy outputs (e.g., plural motors, etc.) | 44 |
| 20080264054 | Integrated hystat having single input and independent output - A drivetrain for use in a mobile vehicle is disclosed. The drivetrain may have a housing, a first hydraulic pump connected to the housing, and a second hydraulic pump connected to the housing. The second hydraulic pump may be in axial alignment with the first hydraulic pump. The drivetrain may also have a first motor fluidly connected to the first hydraulic pump, and a second motor fluidly connected to the second hydraulic pump. The first and second motors may have an axial direction substantially perpendicular to the axial alignment of the first and second hydraulic pumps. | 10-30-2008 |
| 20090049833 | Hydraulic Transaxle - A hydraulic transaxle has an axle casing and a pair of hydraulic motors disposed in the axle casing. The hydraulic motors have respective motor shafts and respective moveable swash plates. An axis of tilt of each moveable swash plate is offset with respect to a longitudinal axis of the respective motor shaft, and the moveable swash plates are operatively engaged to a steering operation device. | 02-26-2009 |
| 20090056326 | Operating device - The objective of the present invention is to provide a device that accurately communicates a subtle variation of an operation side to an action side. Specifically, in the present invention, an operating device is provided to perform a lock release operation of an extension device. The operating device feeds oil to a valve chamber by pressing a piston. When the flow rate of the fed oil is excessive, the valve is pressed to an opening resisting a biasing force of a compressed spring, thereby a rapid increase in the oil supplied to the action section is suppressed. Further, the supplied oil is suppressed to a very small amount by the throttle section, thereby an increase in the operation amount on the action section side is suppressed while maintaining the supply of the oil. | 03-05-2009 |
| 20090158728 | Smart flow sharing system - A smart flow sharing system, useful in hydraulic systems having more than one hydraulically demanding equipment function wherein more than one of the hydraulically demanding functions are sometimes activated at the same time, has modified hydraulic passages and at least two fixed displacement pumps. The system automatically prioritizes hydraulic fluid flow so that when only one of two hydraulically demanding functions is activated by an operator, it receives the hydraulic fluid flow from both fixed displacement pumps, but when both hydraulically demanding functions are activated, one of the functions receives hydraulic fluid flow from the first fixed displacement pump, and the other function separately receives hydraulic fluid flow from the second fixed displacement pump. The smart flow sharing system accomplishes the foregoing without resorting to complex hydraulics or expensive additional components. An equipment operator advantageously achieves superior controllability and quicker movement of equipment functions using the invention. | 06-25-2009 |
| 20090266071 | Hydraulic Four-Wheel-Drive Working Vehicle - A hydraulic four-wheel-drive working vehicle includes a front/rear differential-lock switch valve. The front/rear differential-lock switch valve fluidly connects forward-movement high-pressure lines of the pair of main operation fluid lines, which are fluidly connected to a main hydraulic motor, and the pair of sub operation fluid lines, which are fluidly connected to a sub hydraulic motor, and also fluidly connects the forward-movement low-pressure lines of the pair of main operation fluid lines and the pair of sub operation fluid lines. The front/rear differential-lock switch valve is capable of taking a throttling fluid-connection state of fluidly connecting the corresponding lines in a state where a throttle is interposed therebetween and a full fluid-connection state of fluidly connecting the corresponding lines in a state where the throttle is not interposed therebetween. | 10-29-2009 |
| 20100011758 | HST Unit - An HST unit includes a first hydraulic motor unit for operatively driving one of a pair of driving wheels; a second hydraulic motor unit for operatively driving the other one of the pair of driving wheels; a hydraulic pump unit operatively connected to a driving power source, the hydraulic pump unit configuring a traveling hydrostatic transmission in cooperation with the first and second hydraulic motor units; and an attachment frame for supporting the first hydraulic motor unit, the second hydraulic motor unit and the hydraulic pump unit, the attachment frame being attachable to a vehicle frame. | 01-21-2010 |
| 20100018200 | HYDROSTATIC TRANSMISSION DEVICE FOR A MOBILE MACHINE - Hydrostatic transmission apparatus for a vehicle having a front group of drive members and a rear group of drive members, a pump, a front motor and a rear motor contributing to driving respective ones of the front and rear groups of drive members; a first one of the motors and a second one of the motors connected to the first motor via a series duct also being connected to the main orifices of the pump, thereby constituting a closed transmission circuit; at least one pressure-limiting valve being interposed between the series duct and a low-pressure circuit, and being suitable for connecting the series duct to the low-pressure circuit while being controlled as a function of the high pressure of the pump. The pressure in the series duct is thus effectively limited to a pressure representative of the pressure necessary for driving the vehicle. | 01-28-2010 |
| 20100043423 | HYDROSTATIC TRANSMISSION DEVICE FOR A HEAVY VEHICLE - A hydrostatic transmission including a main pump, two main ducts serving respectfully as feed and as discharge for first and second hydraulic motors that serve to drive disposed one after the other. A bypass valve can take up a reduced-speed position in which the feed main orifices are connected to the discharge main duct, and an increased-speed position in which one of the motors is bypassed, the feed main orifice of the motor being connected to the discharge main duct via a bypass link, while the other main orifices continue to have their respective links. The apparatus further includes a constriction suitable for being activated to restrict the flow of fluid through the bypass link. | 02-25-2010 |
| 20100162696 | Hydraulic Drive Device for Large Hydraulic Excavator - [Problem] To provide a large hydraulic excavator permitting an easy change from a machine mode corresponding to a backhoe excavator to a machine mode corresponding to a loader excavator, and vice versa. | 07-01-2010 |
| 20100170241 | HYDRAULIC ACTUATOR AND JOINT DRIVING UNIT EMPLOYING THE SAME - There are provided a swash member and a first and second rotational members which are held on a base member through a universal joint mechanism and can rock about two axes out of three orthogonal axes including a center of the mechanism, a pump mechanism for transferring a low-pressure non-compressible fluid in a low-pressure pipe portion to a high-pressure pipe portion filled with a high-pressure non-compressible fluid being pressurized by a pressure accumulation mechanism, a control valve device which controls connection between both the pipe portions and a plurality of rocking-torque generation mechanisms which couple the base member and the swash member to each other and are driven by the fluids for generating a rocking torque to the swash member, and rocking-angle adjustment unit for changing a relative angle between the two rotational members. | 07-08-2010 |
| 20100192564 | HYDRAULIC CIRCUIT ADAPTED FOR COUPLING MOTORS - A hydraulic circuit including: at least one primary motor comprising at least first and second distinct sub-motors, the first sub-motor having a first main orifice, and the second sub-motor having a second main orifice; and at least one secondary motor; | 08-05-2010 |
| 20100199656 | Hydraulic Pump Unit - A hydraulic pump unit of variable displacement type is disposed away from a pair of hydraulic motor units which are capable of being independently arranged. The pump unit is fluidly-connected to the pair of hydraulic motor units so as to change the outputs of the pair of hydraulic motor units in both forward and reverse rotation directions. The pump unit includes a hydraulic pump body operatively rotated and driven by a driving source, a pump case surrounding the hydraulic pump body, a capacity adjusting mechanism for changing the capacity of the hydraulic pump body, and an actuator for operating the capacity adjusting mechanism. The actuator is controlled based on a manual operation signal corresponding to a manual operation amount. | 08-12-2010 |
| 20100205955 | HYDRAULIC CIRCUIT OF WINCH FOR CRANE - Second-gear blocking switching valves | 08-19-2010 |
| 20100236235 | HYDRAULIC FLUID COOLING SYSTEM FOR PAIR OF INTEGRATED HYDROSTATIC TRANSMISSIONS - A hydraulic fluid cooling system for a pair of integrated hydrostatic transmissions includes a common reservoir holding hydraulic fluid and having hydraulic lines connecting the common reservoir to each integrated hydrostatic transmission, a hydraulic fluid reservoir inside each integrated hydrostatic transmission, and a pump for pumping fluid from each transmission's hydraulic fluid reservoir to the other transmission. Hydraulic fluid lines link each transmission's hydraulic fluid reservoir to the other transmission. The system pumps hydraulic fluid from the sump or reservoir of each integrated hydrostatic transmission to the other transmission, providing the cooling capacity of a non-loaded transmission to cool hydraulic fluid for a fully loaded transmission. | 09-23-2010 |
| 20100257856 | Pump Unit And Hydrostatic Transmission - There is provided a pump unit configured to be capable of transmitting a rotational per from a driving power source which is operatively connected thereto to an actuator through a pair of hydraulic fluid lines. The pump unit includes: an input shaft; a hydraulic pump main body; a PTO shaft; a PTO clutch mechanism; and auxiliary pump main body; a suction line; a discharge line; a charge line; a PTO hydraulic fluid line; a pressure-reducing valve; and a resistance valve. The PTO hydraulic fluid line and the charge line are fluidly connected to the primary side and a secondary side of the pressure-reducing valve, respectively. | 10-14-2010 |
| 20100313557 | HYDRAULIC SYSTEM FOR CONSTRUCTION EQUIPMENT HAVING FLOAT FUNCTION - A hydraulic system for construction equipment having a float function is provided, which can perform ground leveling as making a boom descend due to its own weight without using hydraulic fluid that is discharged from a hydraulic pump. The hydraulic system for construction equipment having a float function includes first and second hydraulic pumps and a pilot pump, an operation lever, a float function switch which selects a float function, a main control valve installed in a discharge flow path of the first and second hydraulic pumps and including a boom spool controlling a start, step, and direction change of the boom cylinders, a solenoid valve shifted when the float function switch is turned on, a float valve installed in a flow path between the boom spool and the boom cylinders and shifted by pilot signal pressure to return the hydraulic fluid to a hydraulic tank, and a holding logic poppet mounted in the float valve to prevent an abrupt descending of the boom due to leakage of the hydraulic fluid through a flow path between the main control valve and the float valve during the operation of the boom cylinders. | 12-16-2010 |
| 20110005217 | BIDIRECTIONAL HYDRAULIC SYSTEM FOR OPERATING TABLE - A bidirectional hydraulic system for operating table is disclosed, which has a switch valve connecting a bidirectional hydraulic pumping device with movable units of an operating table. The switch valve is driven by a motor, and has a valve block defining at least three outbound valve positions on the valve block's top surface, which is parallel to the inside bottom of the base, which the valve block is attached to, and thereof for controlling oil inlet and oil outlet. The switch valve switches among the outbound valve positions for respectively forming oil passages between the bidirectional hydraulic pumping device and hydraulic cylinders of the movable units. | 01-13-2011 |
| 20110041490 | HYDRAULIC ENERGY ACCUMULATOR - Example energy storage systems ( | 02-24-2011 |
| 20110067393 | Aircraft emergency and backup secondary power apparatus - In combination, an aircraft and a rotatively combined electrical power/generator and hydraulic motor/pump configured to provide either hydraulic power from electrical power, or electrical power from hydraulic power, installed in said aircraft. | 03-24-2011 |
| 20110167812 | HYDRAULIC CONTROL SYSTEM FOR AN AUTOMATIC TRANSMISSION HAVING ELECTRONIC TRANSMISSION RANGE SELECTION WITH FAILURE MODE CONTROL - A hydraulic control system for a transmission includes a source of pressurized hydraulic fluid that communicates with an electronic transmission range selection (ETRS) subsystem. The ETRS subsystem includes an ETRS valve, a park mechanism, first and second mode valve assemblies, a latch valve assembly, and a plurality of solenoids. The ETRS subsystem is configured to provide desired operating conditions during a plurality of potential failure conditions. | 07-14-2011 |
| 20110277460 | Electrohydraulic Steering System - An electrohydraulic steering system, in particular for mobile working machines having a pressure medium supply system from which a first connection, which acts in a first steering direction, can be supplied via a first feed line, while a second connection, which acts in a second steering direction, can be supplied via a second feed line. In this case, the two feed lines and also a first return line from the first connection to a tank and a second return line from the second connection to the tank are controlled via in each case at least two parallel valves. Therefore, in the event of failure of one of the valves, the at least one valve which is connected in parallel can take over control of the corresponding feed lines or the corresponding return line. | 11-17-2011 |
| 20120023924 | VARIABLE HYDRAULIC SYSTEM - A hydraulic system is provided with a prime mover connected to a first fixed displacement pump having a maximum flow A, a hydraulic loop connected to a system of valves and actuators, a second fixed displacement pump having a maximum flow B in fluid communication with the loop, an electric machine operable as one of a motor and a generator connected to the second pump and electrically coupled to a battery, and a controller connected to the prime mover and the electric machine. The hydraulic loop is in fluid communication with the first pump with a first check valve. The second pump is arranged in parallel with the first pump. | 02-02-2012 |
| 20120060488 | HYDRAULIC ENERGY SOURCE FOR SUPPLYING A DOWNSTREAM HYDRAULIC SYSTEM WITH HYDRAULIC ENERGY - A hydraulic energy source for supplying a downstream hydraulic system with hydraulic energy. In particular, a hydraulic system for controlling and/or cooling a transmission preferably a dual clutch transmission. The hydraulic energy source enables a first partial volume flow which is produced at a comparatively high system pressure and which is used to supply an actuator of the hydraulic system and a second partial volume flow which is produced at a comparatively low cooling pressure and which is used to cool the hydraulic system, to be produced The hydraulic energy source has an electrically driveable first volume flow source which is used to produce the first partial volume flow and a second volume flow source which is used to produce the second partial volume flow. The second volume flow source is drivingly connected independently of an internal combustion engine. | 03-15-2012 |
| 20120073283 | HYDRAULIC CONTINUOUSLY VARIABLE TRANSMISSION STRUCTURE FOR AUTOMOBILE AND AUTOMOBILE HAVING THE SAME - The present invention provides a hydraulic continuously variable transmission structure for an automobile comprising an oil tank, a tee joint, a hydraulic pump, an automobile speed regulation valve, an astern valve and a hydraulic motor, wherein the oil tank, the hydraulic pump, the automobile speed regulation valve, the astern valve and the hydraulic motor are connected via oil pipes to form an integral hydraulic continuously variable transmission structure. An automobile adopting the hydraulic continuously variable transmission structure for an automobile is also provided. According to the present application, continuously variation of speed ratio may be achieved. | 03-29-2012 |
| 20120090311 | ACTUATING SYSTEM FOR A MOVABLE AIRCRAFT ENGINE NACELLE ELEMENT, SUCH AS A THRUST REVERSER COVER - This system for actuating at least one aircraft nacelle element comprises at least two actuators (A | 04-19-2012 |
| 20120216521 | METHODS OF CONTROLLLING HYDRAULIC MOTORS - A hydraulic control system includes a first motor, a second motor, a pump operatively associated with the first motor, a first coupling valve operatively associated with the second motor, first parallel valves operatively associated with the second motor, and a first switching valve operatively associated with the first coupling valve and the first parallel valves. The first switching valve is configured to switch the first coupling valve between a first coupling state and a second coupling state opposite the first coupling state and to switch the first parallel valves between a first parallel state and a second parallel state opposite the first parallel state. While the first parallel valves are in the first parallel state a portion of the output of the first motor drives the second motor while the first parallel valves are in the second parallel state, the output of the pump drives the second motor. | 08-30-2012 |
| 20120227393 | Modular Hydraulic Hybrid Drivetrain - A drive module for a hydraulic hybrid vehicle includes two variable displacement over-center bent-axis hydraulic pump/motors with respective yokes that reside and pivot within a common fluid-filled case. The cylinder barrel of each pump/motor is connected to high pressure through fluid-conducting yoke legs, and is connected to low pressure through the fluid-filled case, which is connected by a port to a low pressure source. As a drivetrain for a vehicle, one pump/motor acts primarily as a pump driven by an engine and the other pump/motor acts primarily as a motor to propel the vehicle. A removable support structure facilitates installation to a variety of vehicle chassis. | 09-13-2012 |
| 20120260647 | HYDRAULICALLY OPERATED SETTING DEVICE WITH A HYDRAULIC AGGREGATE AND A JOINING METHOD FOR CONNECTING AT LEAST TWO COMPONENTS - A hydraulically operated setting device with a hydraulic aggregate as well as a joining method for connecting at least two components with the help of the hydraulically operated setting device is described. The cycle times compared to conventional joining methods are reduced through the targeted use of volume flows of hydraulic fluid in the prestroke chamber and the return-stroke chamber of the piston in connection with the plunger and the hold-down device chamber in connection with the plunge piston and the hold-down device. | 10-18-2012 |
| 20130067901 | HYDRAULIC TUBING SUPPORT STRUCTURE AND OPERATING MACHINE PROVIDED THEREWITH - A hydraulic tubing support that reduces noise transmitted to an operator due to pulsation of hydraulic oil in a junction tube. The hydraulic tubing support structure includes a pair of left and right remote control valves for generating pilot pressures for the plurality of hydraulic actuators in response to an input operation performed on each operating lever, pump-side tubes and tank-side tubes respectively extending from the respective remote control valves, a junction tube for allowing communication of the tubes guided to below a floor plate through a through hole and communication of the tubes guided to below the floor plate through a through hole, and a middle reinforcement beam extending in a right-and-left direction and fixed to the lower surface of the floor plate. The junction tube is fixed to the middle reinforcement beam in a non-contact state with the floor plate. | 03-21-2013 |
| 20130104535 | Pump displacement control mechanism | 05-02-2013 |
| 20130139498 | CONTROL APPARATUS FOR A FIRST TOOL AND A SECOND TOOL - A control apparatus for a first and a second tool ( | 06-06-2013 |
| 20130180237 | HYDRAULIC TRANSMISSION CIRCUIT WITH MULTIPLE CAPACITIES - 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. | 07-18-2013 |
| 20130219878 | AIRCRAFT ACTUATOR HYDRAULIC SYSTEM - A plurality of actuators ( | 08-29-2013 |
| 20130239561 | Hydraulic Transaxle - A hydraulic transaxle comprises a transaxle housing, an axle, a hydraulic pump, a hydraulic motor, a hydraulic circuit, and a pair of auxiliary pumps. The transaxle housing defines a fluid sump therein. The axle is supported by the transaxle housing. The hydraulic motor is disposed in the transaxle housing so as to drive the axle. The hydraulic pump is disposed in the transaxle housing so as to supply hydraulic fluid to the hydraulic motor. The hydraulic circuit is disposed in the transaxle housing so as to fluidly connect the hydraulic pump to the hydraulic motor. The pair of auxiliary pumps are disposed in the transaxle housing so as to supply fluid from the fluid sump to outside of the transaxle housing. | 09-19-2013 |
| 20130255245 | HYDRAULIC OIL CYLINDER, HYDRAULIC CUSHION SYSTEM, EXCAVATOR AND CONCRETE PUMP TRUCK - The present application discloses a hydraulic oil cylinder, of which a piston rod (3) is provided with at least two cushion collars ( | 10-03-2013 |
| 20130305702 | HYDROSTATIC DRIVE - A hydraulic additional drive includes a hydraulic or having working ports configured to be connected to a pump via a high pressure branch and a low pressure branch. The hydraulic motor further includes a purging port to which a feed pressure is configured to be applied to set a “free-wheel mode” while the working ports are connected to a tank. The pressure at the purging port is limited to a comparatively low value between the feed pressure and the tank pressure by a pre-charging valve integrated into the hydraulic motor. The pre-charging valve is arranged in a free-wheel duct which hydraulically connects the purging port to one of the working ports. | 11-21-2013 |
| 20140060035 | IMPLEMENT WITH REDUCED HYDRAULIC OIL EXCHANGE - A folding implement frame having seven sections in a use position and nine sections when folded. The frame design allows a frame having a width of greater than 27 meters to be folded into a transport position having a width of less than eight meters and a height of less than six meters. The hydraulic system transfers weight to the center frame section during folding and unfolding to enhance stability. The hydraulic system uses accumulators to minimize the amount of oil reduction in the tractor reservoir resulting from extension of the hydraulic cylinders of the implement. Implement raise and lower cycle times are minimized by a helper cylinder to lift the frame main section when the entire implement weight is on the main section and allowing a smaller cylinder to lift the frame main section in the use position for shorter cycle times to raise and lower the implement. | 03-06-2014 |
| 20150292617 | CONTROL MECHANISM FOR A CONTINUOUSLY VARIABLE TRANSMISSION - A control mechanism for a continuously variable transmission, the transmission having a mechanical branch and a hydrostatic branch, the hydrostatic branch having a variable displacement hydraulic pump which drives first and second variable displacement hydraulic motors, the control mechanism controlling an operating angle of the hydraulic pump and motors, the mechanism comprising: an actuator, a pump adjustment means, operable by the actuator, to vary the operating angle of the pump, characterised in that the mechanism further comprises: first and second motor adjustment means, the adjustment means being operable by the actuator to vary the operating angle of the first and second motors, respectively. | 10-15-2015 |
| 20150330416 | FLUID PRESSURE CONTROL DEVICE FOR POWER SHOVEL - A fluid pressure control device for a power shovel includes: a first switching valve configured to permit or prohibit communication between a first pump and a first cylinder; a second switching valve configured to permit or prohibit communication between a second pump and a second cylinder; a third pump configured to allow to supply working fluid to the first cylinder and the second cylinder; a first junction control valve configured to permit or prohibit communication between the third pump and the first cylinder or the second cylinder; and a communication control valve configured to prohibit communication between the third pump and the first cylinder to guide the working fluid discharged by the third pump to the second cylinder by controlling the first junction control valve in a case where the second pump is communicated with the second cylinder by the second switching valve regardless of whether or not the first pump is communicated with the first cylinder by the first switching valve. | 11-19-2015 |
| 20160047400 | Pipe Tool Positioning System - A pipe tool positioning system for efficiently inserting, positioning, and orienting a tool for use within a pipe. The pipe tool positioning system generally includes a sleeve with a receiver opening adapted to receive and removably retain a tool such as a grinder or the like. The sleeve includes radially-offset bladders extending outwardly from its outer surface. Each of the bladders may be individually inflated and/or deflated to aid in positioning of the tool within a pipe. A control unit may be provided with controllers for individually controlling each of the bladders. A camera may also be included adjacent to the sleeve to feed a display included with the control unit. By utilizing the present invention, various tools may efficiently be inserted and positioned for use within a pipe. | 02-18-2016 |
| 20160069358 | HYDRAULIC MOTOR DRIVE DEVICE - The hydraulic motor drive device uses a radial hydraulic motor to drive a hydraulic pump for pumping pressure oil to form hydraulic energy and also uses the radial hydraulic motor to be configured as hydraulic energy for driving an executing element of a configuration load; a cylinder liner of the radial hydraulic motor is eccentrically and fixedly connected to the set circumference of a motor spindle of which the left end is supported by a tapered roller bearing fixedly connected in a motor left end cover of a left under-chassis and of which the right end is supported by a tapered roller bearing fixedly connected in a motor right end cover of a right under-chassis, so as to drive the motor spindle to rotate and operate; because hinge bars accept the transfer force by an engagement point and the force transferring direction is the direction of transferring the oil pressure configured according to the system need, namely that the direction from pushing a plunger in the cylinder liner by the oil pressure to pushing a roller by an outer hinge bar and the tangential component force direction of the force of a motor curved guide rail on the roller are consonant with the rotating and operating direction of the motor spindle, simultaneous working is achieved for driving the power system load; and the connection mode of the motor spindle of the radial hydraulic motor for driving the configuration equipment is internal connection, and can also be made into external connection of output shaft according to the configuration need. | 03-10-2016 |
| 20160131163 | Hydrostatic Drive For Variable Speed Operation of Rotational Equipment - A hydrostatic drive, to operate rotational industrial equipment such as a fan, a pump, a compressor, a conveyor or other drive used in industrial settings. The invention utilizes one or more variable displacement pump(s) configured to drive one or more fixed displacement hydraulic motor(s), or utilizing one or more fixed displacement pump(s) configured to drive one or more variable displacement hydraulic motor(s) or utilizing one or more variable displacement pump(s) configured to drive one or more variable displacement hydraulic motor(s). The pump(s) is powered by a fixed speed or variable speed motor or engine, most likely a fixed speed electric motor. The motor operates the rotational equipment with the purpose of process control, efficiency, and/or energy conservation. | 05-12-2016 |
| 20160177977 | PATIENT SUPPORT APPARATUS WITH HYDRAULIC CONTROL SYSTEM | 06-23-2016 |
| 20170234334 | Hydraulic Drive System for Work Machine | 08-17-2017 |
