| Entries |
| Document | Title | Date |
|---|
| 20080229739 | Drive System Having a Common Control-Pressure Connection - The invention relates to a drive system ( | 09-25-2008 |
| 20080276606 | HYDRAULIC DRIVE SYSTEM WITH EXITING FROM PUMPING AND MOTORING - A hydraulic drive system for storing and releasing hydraulic fluid includes a high pressure storage device, a low pressure storage device, and a pump-motor operating at a range of pump-motor speeds for converting between hydraulic energy and mechanical energy. The pump-motor is disposed between the high pressure device and the low pressure device. In normal operation, the hydraulic drive system enters a motoring mode where hydraulic energy is released from the high pressure storage device and converted to mechanical energy using the pump-motor. It also enters a pumping mode where mechanical energy is converted into hydraulic energy. A neutral state exists where hydraulic energy is neither stored nor released from the high pressure storage device. An approach for exiting either the motoring mode or the pumping mode promotes efficiency within the hydraulic drive system. | 11-13-2008 |
| 20090007558 | Energy Storage - A system for performing work having a hydraulic circuit has a length of hose, a hydraulic fluid in the circuit in communication with the hose and with a hydraulic actuator for doing the work, and a mechanism for pressurizing the hydraulic circuit such that at least 50 foot pounds of energy is stored within the hose to perform the work. | 01-08-2009 |
| 20090019845 | Actuation system for a servo-assisted mechanical transmission with oil leakage recovery - An actuation system for a servo-assisted transmission; the actuation system is provided with: a hydraulic circuit comprising a reservoir containing a control fluid, a hydraulic accumulator containing the pressurized control fluid, and a pump which draws from the reservoir and feeds the hydraulic accumulator; at least a hydraulic actuator comprising at least one actuation chamber and a mobile piston which slides within the actuation chamber; a solenoid valve for connecting the actuation chamber of the hydraulic actuator to the hydraulic accumulator and to the reservoir; and a recirculation circuit, which departs from at least one environment bordering with the actuation chamber of the hydraulic actuator and ends in the reservoir. | 01-22-2009 |
| 20090025379 | SYSTEM FOR RECOVERING ENERGY FROM A HYDRAULIC LIFT - A hydraulic circuit that is capable of recovering even very small amounts of energy by magnifying the pressure of the return fluid such that an accumulator can be effectively charged to a suitable operating pressure. Pressurized fluid from the accumulator is then used to drive one or more hydraulic actuators. | 01-29-2009 |
| 20090064672 | COMPRESSED FLUID MOTOR - A compressed fluid motor has a plurality of cylinders with a piston and a piston rod. A main bearing is concentric with a crankpin and coupled to a shaft. Compressed fluid on the piston pushes on the main bearing via its corresponding piston rod. Bearing guide plates hold the one or more piston rod in place on the main bearing. A timing and control mechanism controls flow of compressible fluid to press on the piston and turn the shaft to perform work. | 03-12-2009 |
| 20090071139 | Excavator and a machine for material transfer - The invention relates to an excavator or to a machine for material transfer comprising an element movable via at least one hydraulic cylinder. In accordance with the invention, one or more hydraulic cylinders are additionally hinged to the element, with the additional hydraulic cylinder(s) being connected to one or more hydraulic accumulators. | 03-19-2009 |
| 20090100830 | Hydraulic drive system - The present invention relates to a hydraulic drive system for driving an apparatus, with a drive unit, a first and a second hydraulic displacement machine, with which the drive unit is connectable or connected for transmitting mechanical energy, and a third and a fourth hydraulic displacement machine, which are connectable or connected with the apparatus for transmitting mechanical energy, wherein the first hydraulic displacement machine is hydraulically connected or connectable with the third hydraulic displacement machine, and wherein a high-pressure accumulator is provided, which is hydraulically connected or connectable with the second and the fourth hydraulic displacement machine. | 04-23-2009 |
| 20090126360 | HYDRAULIC SYSTEM WITH ACCUMULATOR ASSIST - A system for operating a hydraulically actuated device that is provided on a vehicle includes a pump drive unit that is adapted to operate a hydraulic pump. The vehicle includes a drive train having a portion that engages the pump drive unit for operation. The system also includes an accumulator and a hydraulically actuated device. Lastly, the system includes a controller that causes the hydraulic pump to supply pressurized fluid to the hydraulically actuated device when a demand is requested by the user. The controller causes the hydraulic system to supply pressurized fluid to the hydraulically actuated device independent of whether the vehicle is moving or stationary. | 05-21-2009 |
| 20090165450 | HYDRAULIC SYSTEM - A ground engaging vehicle including a movable member, a hydraulically driven actuator, a hydraulic pump, a plurality of valves and at least one hydraulic conduit. The hydraulically driven actuator is coupled to the movable member and the actuator has a first chamber and a second chamber. The plurality of non-proportional valves include a first valve, a second valve, a third valve and a fourth valve. The at least one hydraulic conduit couples the pump with the first valve and the second valve. The first valve is in direct fluid communication with the first chamber. The second valve is in direct fluid communication with the second chamber. The third valve is in direct fluid communication with the first chamber and the fourth valve is in direct fluid communication with the second chamber. The first valve and the second valve each include an open position and a closed position. | 07-02-2009 |
| 20090173066 | HYDRAULIC BRAKE ENERGY REGENERATION SYSTEM FOR ELECTRIC ENERGY STORAGE AND VEHICLE DRIVE ASSIST - A hydraulic drive system for storing and releasing hydraulic fluid includes a high pressure storage device, a low pressure storage device, a pump operating at a range of pump speeds for converting between mechanical energy and hydraulic energy, and a motor operating at a range of motor speeds for converting between hydraulic energy and mechanical energy. The pump and motor are both fluidly connected to the high and low pressure storage devices. The hydraulic drive system further includes a control valve fluidly connected to the high pressure storage device, the pump and the motor, the control valve being operable to selectively distribute high pressure fluid between the pump, motor and high pressure storage device. | 07-09-2009 |
| 20090188249 | REGENERATION SYSTEM - A regeneration system for use in a vehicle having a reciprocating-piston engine. The regeneration system captures energy (e.g. braking energy), stores the energy, and subsequently uses the stored energy to generate motive power for the vehicle. The motive power can be generated in conjunction with motive power provided by the engine. The regeneration system comprises a variable displacement pump/motor that is connected to a connecting rod in each cylinder of the engine. The pump/motor comprises a fluid chamber, a primary piston mechanically coupled to the connecting rod and a slave piston coupled to the primary piston via resilient means. A control unit controls a plurality of valves to direct the exchange of pressurized hydraulic fluid between the pump/motor and a hydraulic accumulator in synchronous timing with the operation of the engine. | 07-30-2009 |
| 20090193801 | HYDRAULIC DRIVE SYSTEM - A hydraulic drive system for an actuator uses a pair of pressure compensated hydraulic machines to control flow to and from the drive chambers of the actuator by varying the controlled pressure of one of the machines. The machines are mechanically coupled to permit energy recovery and charge an accumulator to store supplies energy. The drive system may be combined with other services including a transmission for incorporation in a vehicle. The transmission uses a pressure compensated supply and torque control of the wheels. | 08-06-2009 |
| 20090241534 | ENERGY ACCUMULATOR UNIT - The invention relates to an energy storage unit for a hydrostatic-mechanical drive system ( | 10-01-2009 |
| 20090308065 | HYDRAULIC OUTPUT DRIVE SHAFT GENERATOR - The invention relates to a mobile machine having a traction drive and working hydraulics. The drive unit has a radial piston pump which is driven by a drive set and supplies working hydraulics. The radial piston pump is arranged on the axis of the output drive shaft of the drive set, between the drive set and a gearbox which is connected thereto via the output drive shaft. The drive set, the radial piston pump and the gearbox in this case form a compact drive unit. | 12-17-2009 |
| 20100000209 | Hydraulic control system in working machine ( as amended - A hydraulic control system in a working machine includes hydraulic cylinders that make a working part ascend and descend; a first main pump that suctions oil from an oil tank and discharges the oil; an accumulator that accumulates oil discharged from weight holding side oil chambers of the hydraulic cylinders when the working part descends; and a hybrid pump that suctions accumulated oil pressure in the accumulator and discharges the oil pressure. When the working part ascends, discharged oil from the hybrid pump is supplied to the weight holding side oil chambers of the hydraulic cylinders. When an insufficient supply flow from the hybrid pump to the hydraulic cylinders exists, a complementary flow corresponding to the insufficient supply flow is supplied from the first main pump to the weight holding side oil chambers of the hydraulic cylinders. | 01-07-2010 |
| 20100024410 | Hydraulic system having regeneration modulation - A hydraulic system for a machine is disclosed. The hydraulic system may have an actuator with a first chamber and a second chamber. The hydraulic system may also have a first valve, a second valve, a third valve, and an operator input device displaceable from a neutral position to generate a signal indicative of a desired movement of the actuator. The hydraulic system may further have a controller configured to open the first and third valves by amounts related to the signal to pass fluid, and open the second valve by an amount related to the signal to pass fluid when the signal indicates a desire for increased actuator velocity. The third valve may continue to open during opening of the second valve. | 02-04-2010 |
| 20100031647 | Hydraulic Circuit Device - A hydraulic circuit device for activating the at least one clamping die ( | 02-11-2010 |
| 20100050622 | Hydropneumatic accumulator with flexible porous filler - A hydropneumatic accumulator with a flexible porous filler intended for fluid power recuperation in hydraulic systems with a high level of pulsations includes a shell where a gas port and a fluid port are connected, respectively, with a gas reservoir and a fluid reservoir of variable volume separated by a movable separator. The flexible porous filler fills the gas reservoir so that the separator movement reducing the gas reservoir volume compresses said filler. The filler is connected with internal walls of the gas reservoir with the possibility of stretching the filler at the separator movement increasing the volume of the gas reservoir. The accumulator contains means of protection of the filler boundary layer against rupture made with the possibility of reducing local deformations of the boundary filler layer in case of jerks of the separator. Development of residual deformations of the filler during multiple recuperation cycles and destruction at non-uniform motion of the separator with strong jerks are prevented. | 03-04-2010 |
| 20100050623 | HOSELESS HYDRAULIC SYSTEM - A hoseless hydraulic system is provided which addresses certain safety and efficiency issues known in the art. The hydraulic system includes a shell, an accumulator disposed within the shell, a hydraulic pump at least partly disposed within the shell, and at least one hydraulic motor at least partly disposed within the shell. High pressure fluid communication conduits are substantially located within the shell. The only communication across the shell boundary is mechanical power in, mechanical power out, control signals in, and sensor signals out. | 03-04-2010 |
| 20100071357 | AUXILIARY PUMP SYSTEM FOR HYBRID POWERTRAINS - An auxiliary pump system for a hybrid powertrain includes a hydraulic accumulator, a hydraulic transformer, a plurality of control devices, a sump, and a plurality of fluid flow paths. The accumulator is charged by a high flow, high pressure hydraulic fluid by opening a first of the control devices and closing a second of the control devices. The accumulator is discharged by closing the first of the control devices and opening the second of the control devices. A high pressure, low flow hydraulic fluid is communicated from the accumulator to the hydraulic transformer. The hydraulic transformer converts the high pressure, low flow hydraulic fluid into a high flow, low pressure hydraulic fluid that is employed by systems within the hybrid powertrain. | 03-25-2010 |
| 20100229544 | Systems and Methods for Improving Drivetrain Efficiency for Compressed Gas Energy Storage - Generally, the invention relates to power generation and energy storage. In particular, to systems and methods for providing constant power from hydraulic inputs having widely-varying pressures. More particularly, the invention relates to hydraulic-pneumatic energy storage and recovery systems that include either a fixed or variable displacement hydraulic motor and control systems that allow a user to maintain constant power from the fixed or variable displacement hydraulic motor. | 09-16-2010 |
| 20100236231 | HYDRAULIC SUPPLY DEVICE OF AUTOMATIC TRANSMISSION - A hydraulic supply device of an automatic transmission, which supplies operating oil to the automatic transmission that is able to shift power from an engine and transmit the power to drive wheels of a vehicle by selectively engaging a plurality of frictional engagement devices using hydraulic pressure is disclosed. The hydraulic supply device includes: an accumulator that accumulates operating oil; a leaking flow compensation hydraulic pump that supplies the operating oil for compensating for a flow rate of the operating oil leaking in the automatic transmission to the automatic transmission by being driven by a power source different from the engine when the engine is automatically stopped; and a hydraulic supply control mechanism configured to supply the operating oil accumulated in the accumulator to a starting frictional engagement device that is one of the plurality of frictional engagement devices to be engaged at the time of starting the vehicle when the engine is restarted after the engine is automatically stopped. | 09-23-2010 |
| 20100236232 | Drive for a Hydraulic Excavator - The present invention relates to a drive for an excavator with a number of individual drives, such as a slewing gear drive, a hoist drive, a bucket drive and an arm drive, wherein for the slewing gear drive two reversible adjusting units are provided, which are at least coupled with an energy accumulator. | 09-23-2010 |
| 20100287923 | PRESSURE RESERVOIR, IN PARTICULAR FOR A HYDRAULIC UNIT OF A HYDRAULIC VEHICLE BRAKE SYSTEM WITH ELECTRONIC SLIP CONTROL - The invention relates to a pressure accumulator, especially for a hydraulic unit of a hydraulic vehicle braking system with electronic wheel slip regulation. Pressure accumulators having an accumulator piston acted on by a piston spring are known according to prior art. In order to save costs on parts for the piston spring and to save space in terms of the pressure accumulator, a piston spring having at least one first spring winding is used. According to the invention, the outer diameter of the first winding is smaller than the inner diameter of a second spring winding connected thereto. | 11-18-2010 |
| 20100293934 | HYDROSTATIC DRIVE WITH BRAKING ENERGY RECOVERY - The invention relates to a hydrostatic drive ( | 11-25-2010 |
| 20110146257 | HIGH TORQUE OUTPUT DRIVE SYSTEM - A high torque output drive system includes a fluid tank that stores a fluid, an array of weighted members disposed in series such that leading and trailing subarrays thereof are respectively placed along left and right running routes in the fluid tank, upper and lower direction reversing guide units respectively defining upper and lower guide routes each of which interconnects the left and right running routes, a fluid pump operable to move the fluid such that levels of the fluid in left and right columnar regions of the fluid tank are variable to result in generation of a buoyant force for lessening the weight of the trailing subarray so as to induce synchronized downward and upward movements of the leading and trailing subarrays, and a force-output shaft coupled to the weighted members by a gear train unit and revolvable to provide a high torque for a desired end use. | 06-23-2011 |
| 20110197573 | DEVICE FOR COMPENSATING FOR HYDRAULIC EFFECTIVE PRESSURES - The invention relates to a device for compensating for hydraulic effective pressures in a hydraulic accumulator ( | 08-18-2011 |
| 20110197574 | HYDRAULIC TRANSMISSION SYSTEM HAVING A MAIN PUMP THAT CAN BE ACTUATED CONTINUOUSLY - A hydraulic transmission system for a vehicle, the system including:
| 08-18-2011 |
| 20110197575 | HYDRAULIC TRANSMISSION APPARATUS MAKING QUICK POSITIVE CLUTCHING/DECLUTCHING POSSIBLE - Hydraulic transmission apparatus including a pressurized fluid source and at least one hydraulic motor fed by said pressurized fluid source. The motor has two motor ducts for feed/discharge, and one casing duct. The motor can be operated in assisted mode, in which it generates torque or in unassisted mode in which it does not generate any torque and its pistons are maintained in the retracted position under the effect of the pressure in the casing duct. The apparatus further includes an accumulator suitable for feeding:
| 08-18-2011 |
| 20110197576 | HYDRAULIC CONTROL SYSTEM IN WORKING MACHINE - A hydraulic control system that includes a controller that controls the accumulator flow rate control valve and a discharge flow rate of the hydraulic pump, wherein the controller: determines a minimum value among an operation demand flow rate to be demanded by an operation amount of hydraulic actuator operating members, a pump flow rate to be determined by a discharge pressure of the hydraulic pump under a constant horsepower control and a maximum flow rate of the hydraulic pump such that the determined minimum value is an actuator supply flow rate to be supplied to the plurality of hydraulic actuators, and controls the discharge flow rate and the accumulator flow rate so as to supply the actuator supply flow rate corresponding to a total flow rate of the discharge flow rate and the accumulator flow rate. | 08-18-2011 |
| 20110209470 | TRANSMISSION HYDRAULIC CONTROL SYSTEM HAVING A PUMP BYPASS VALVE - A system for providing pressurized hydraulic fluid in a transmission of a motor vehicle includes a pump for providing pressurized hydraulic fluid having an inlet port and an outlet port. A bypass valve includes an inlet port in communication with the outlet port of the pump, a first outlet port in communication with the inlet port of the pump, and a second outlet port. The inlet port of the bypass valve is in communication with the second outlet port of the bypass valve when the bypass valve is in a first position and the inlet port of the bypass valve is in communication with the first outlet port of the bypass valve when the bypass valve is in a second position. A control device and accumulator are operatively associated with the bypass valve. | 09-01-2011 |
| 20110239639 | ENERGY STORAGE DEVICE, ACTUATOR AND METHOD - An energy storage device a first member and a second member that is slidably engaged with the first member. There are at least two seals that slidably seal the first member to the second member and define a cavity therebetween that varies in volume with relative movement between the first member and the second member. The first member is biased toward the second member in a direction that resisted increases in volume of the cavity. | 10-06-2011 |
| 20110302913 | Hydrostatic System Having A Hydropneumatic Accumulator - A hydrostatic system includes a hydropneumatic accumulator which is connected via a hydraulic resistance to a compensating volume. Means are provided in the hydrostatic system for measuring a pressure prevailing on that side of the hydraulic resistance which faces towards the compensating volume. A volume flow restricting device may be actuated if the pressure prevailing there exceeds a limit value. | 12-15-2011 |
| 20120017580 | COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE - A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control. | 01-26-2012 |
| 20120036844 | PNEUMATIC SYSTEM WITH ONE OR MORE PISTON-CYLINDER ARRANGEMENTS - The present invention encompasses a pneumatic system with a pressure source adapted for generating a medium under pneumatic pressure, a control valve coordinated with the pressure source, via a first conduit, a piston-cylinder arrangement or a “motor”, whose working chamber is coordinated, via a second conduit, with said control valve and whose low-pressure or return chamber is coordinated, via a third conduit, with one side of a coupling arrangement whose other side is coordinated, via a fourth conduit, with said pressure source. Said coupling arrangement is in the form of a unit coordinated with the piston-cylinder arrangement but discrete or separated from the piston-cylinder arrangement. Within said unit and extending between connections associated with the unit there is disposed at least one direct or indirect coupling-in of a high pressure regulator and a low-pressure regulator. | 02-16-2012 |
| 20120042643 | METHOD AND APPARATUS FOR STORING MECHANICAL ENERGY BY QUASI-ISOTHERMAL EXPANSION AND COMPRESSION OF A GAS - A system for energy storage, in particular for mechanical energy, including a system for quasi-isothermal compression of a gas via a hydraulic fluid. The mechanical energy stored is then released by quasi-isothermal expansion of the gas. The system is also configured to store electrical energy, in particular from intermittent sources such as photovoltaic or wind energy. The storage of excess electrical energy can also be considered for use during consumption peaks. | 02-23-2012 |
| 20120055148 | MAGNETIC MOTOR AND AUTOMOBILE - A magnetic motor automobile carries a magnetic motor and star rotor compressor to pack high-pressure input air into its on-board storage tanks. The compressor and storage tanks deliver the high-pressure working air and operational flows to several stages of compressors that boost the pressures during driving to very high-pressure, then ultra high-pressure, then super high-pressure, and finally to extremely high-pressure. A pneumatic torque converter uses jets of the extremely high-pressure to turn an input shaft of a transmission and differential. These, in turn, drive the powered wheels of a car. | 03-08-2012 |
| 20120102937 | Systems and Methods for Pre-Heating Compressed Air in Advanced Adiabatic Compressed Air Energy Storage Systems - Systems and methods provide for capturing heat energy in a power generation system. The system includes: a first compressor configured to exhaust a first compressed, heated air flow; a heat exchanger connected to the first compressor and configured to receive the first compressed, heated air flow and configured to transfer heat energy from the first compressed, heated air flow to an oil; at least one pump connected to the heat exchanger and configured to pump the heated oil in a closed-loop system from the heat exchanger to an insulated storage tank; a second compressor connected to the heat exchanger and configured to exhaust a second compressed, heated air flow; and an energy storage unit connected to the second compressor and configured to store heat energy from the second compressed, heated air flow. | 05-03-2012 |
| 20120240566 | HYDRAULIC CONTROLLER - A hydraulic controller includes: an accumulator connected to a main oil passage; a pressure storage use oil passage which branches off from the main oil passage and leads to the accumulator; an inlet port; a priority port; and a bypass port. The hydraulic controller includes a priority valve configured such that, at the time of storing pressure in the accumulator, of pressure oil that flows into the inlet port, the pressure oil at a flow rate for storing of pressure in the accumulator, which is a preset flow rate, flows out of the priority port, and the pressure oil at a surplus flow rate, which is a flow rate obtained by subtracting the flow rate for storing of pressure from the flow rate of the pressure oil flowing into the input port, flows out of the bypass port. | 09-27-2012 |
| 20120260644 | ENGINE AUGMENTATION OF HYDRAULIC CONTROL SYSTEM - A power distribution system includes a prime mover and a hydraulic drive system. The hydraulic drive system includes an accumulator to store energy and supplement that available from the prime mover. A control monitors torque imposed on the prime mover and utilises energy stored in the accumulator to offload the prime mover when its operating conditions are to be changed. Effecting a change under reduced load conditions mitigates inefficient operation of the prime mover. | 10-18-2012 |
| 20120266590 | BROAD PRESSURE AND FREQUENCY RANGE ACCUMULATOR - A method and apparatus for reducing undesirable pressure fluctuations over predetermined pressure and frequency ranges in a working fluid system, facilitating maintenance of appropriate levels of stored energy in the fluid system. Embodiments may be employed within a fluid system to dampen pressure fluctuations over an adequately large pressure range, for example in a resonant vibratory system. In such systems, pressures vary dramatically depending on whether resonance is achieved. An apparatus comprises a pressure vessel having a self equilibrating flexible piston device. The piston separates a gas volume from a fluid volume exposed to the system flow. The piston translates within the pressure vessel to equilibrate the gas and fluid pressures. A flexible portion of the piston deflects at high frequency and adequate volume to reduce undesirable pressure fluctuations. The flexible portion translates force via its outer periphery to a ring portion which translates within the pressure vessel. | 10-25-2012 |
| 20120312005 | Self-Pumping Hydropneumatic Piston-Cylinder Unit With Adjustable Level Position - Self-pumping hydropneumatic piston-cylinder unit comprising a working cylinder in which a piston rod with a piston is guided so as to be axially movable, wherein the working cylinder carries a hollow pump rod aligned in the longitudinal axis of the piston-cylinder unit, wherein a radial control bore in the pump rod cooperates with a pump sleeve on the piston rod side, wherein the pump rod and the pump sleeve are connected to a fluid reservoir and form a pumping device by which a determined level position is automatically adjusted, wherein the pump sleeve is controllable by an actuator to adjust the determined level position, characterized in that the axial position of the pump sleeve relative to the control bore is adjustable by means of the actuator. | 12-13-2012 |
| 20120324880 | ELECTRIC-HYDRAULIC HYBRID DRIVER - The present invention provides an apparatus for electrically and hydraulically driving a hydraulic cylinder, including a hydraulic pump rotatable in opposite directions, an electric motor for driving the hydraulic pump, a reservoir tank containing hydraulic fluid therein, and a servo-valve. The hydraulic cylinder makes fluid-communication at a head-sided hydraulic chamber with a first port of the hydraulic pump, and makes fluid-communication at a rod-sided hydraulic chamber with a second port of the hydraulic pump. The servo-valve allows ones of the head-sided hydraulic chamber and the rod-sided hydraulic chamber to make fluid-communication to the reservoir tank in accordance with a direction in which the hydraulic pump rotates, and varies a degree at which one of the head-sided hydraulic chamber and the rod-sided hydraulic chamber makes fluid-communication with the reservoir tank, to a designated degree. | 12-27-2012 |
| 20130008154 | Vehicle Having an Automatic Transmission and an Automatic Engine Start/Stop System - A vehicle has an internal combustion engine, an automatic transmission with an electrohydraulic transmission control unit, a transmission oil pump driven by the engine, and an electronic engine start and stop system. The start and stop systems switches off the internal combustion engine in operating phases, in which the vehicle is temporarily stopped, if predefined operating parameters are present, and starts the internal combustion engine if a restart signal is present. A purely mechanical pressure accumulator device provides stored hydraulic pressure to the electrohydraulic transmission control unit in a time period following the starting of the internal combustion engine, in which time period, the transmission oil pump is still building-up pressure. | 01-10-2013 |
| 20130067900 | POWER GENERATING APPARATUS OF RENEWABLE ENERGY TYPE - A power generating apparatus includes a rotating shaft, a hydraulic pump driven by the rotating shaft, a hydraulic motor driven by pressurized oil supplied from the hydraulic pump, and a generator coupled to the hydraulic motor. Each of the hydraulic pump and motor includes working chambers each defined by a cylinder and a piston, a high pressure manifold and a low pressure manifold. Each of the high and low pressure manifolds includes branch channels connected to the working chambers and a merging channel connected to a high or low pressure oil line. The branch channels are equipped with high or low pressures valves, joined together and merged into the merging channel. | 03-21-2013 |
| 20130086898 | BRAKE DEVICE OF ELECTRO-HYDRAULIC BRAKE SYSTEM FOR VEHICLES - Disclosed herein is a brake device of an electro-hydraulic brake system for vehicles which provides hydraulic braking force to transmit stable pedal feel and provides regenerative braking for fuel efficiency improvement. The brake device includes an actuator unit including a master cylinder, a housing including a boosting chamber and a simulation chamber, an input rod, a reservoir connected to the upper portion of the master cylinder and storing oil, a simulator connected to the simulation chamber and a pedal displacement sensor sensing displacement of the pedal, and a hydraulic control unit. The hydraulic control unit includes an accumulator, a pump sucking oil from the reservoir and discharging the oil to the accumulator, a motor, a first control valve, a second control valve, a third control valve, pressure sensors sensing the pressures of the accumulator, the boosting chamber and the simulation chamber, and an electronic control unit (ECU). | 04-11-2013 |
| 20130098022 | CONTROL DEVICE FOR A HYDRAULIC PUMP OF CONSTRUCTION MACHINERY - A negative control type hydraulic pump control device mounted on a construction machine such as an excavator is provided. The hydraulic pump control device includes an accumulator storing a control signal pressure, a solenoid valve supplying any one of the signal pressure from the accumulator and a negative signal pressure to the regulator when a solenoid valve is shifted in accordance with applying of the control signal, and an operation lever locking unit turning ON/OFF the control signal applied to the solenoid valve in accordance with a driver's operation, wherein an inclination angle of a swash plate of a hydraulic pump is maintained with a minimum capacity by compensating for the negative signal pressure caused by hydraulic fluid supplied from the accumulator through shifting of the solenoid valve when an engine starts. | 04-25-2013 |
| 20130098023 | ENERGY RECOVERY CONTROL CIRCUIT AND WORK MACHINE - An energy recovery control circuit is provided with an energy recovery system for recovering energy of a work equipment. The energy recovery control circuit includes an recovery control valve block in which a plurality of valves that constitute the energy recovery system are incorporated. The recovery control valve block includes a main spool, in which a plurality of control characteristics concerning recovery of energy are consolidated. | 04-25-2013 |
| 20130104534 | ENERGY HARVESTING PASSIVE AND ACTIVE SUSPENSION | 05-02-2013 |
| 20130125539 | HYDRAULIC CONTROL DEVICE FOR WORKING VEHICLE - A boom control valve and a pulsation absorption control valve are provided in the halfway point of a center bypass line. The pulsation absorption control valve is arranged in a position downstream of the boom control valve. The pulsation absorption control valve is switched to a blockade position and a communication position by a pilot pressure from a remote control valve. The pulsation absorption control valve is constituted such that one main line out of a pair of main lines is communicated with or blocked off from an accumulator via one communication line and the other main line is communicated with or blocked off from the side of a tank via the other communication line. The accumulator is operated as a dynamic damper at the traveling of a vehicle. This arrangement enables the construction of the communication line to be simplified, thus improving operability at assembling. | 05-23-2013 |
| 20130125540 | APPARATUS, METHOD AND COMPUTER PROGRAM PRODUCT FOR MOVING CARGO, AND A KIT AND METHOD FOR UPGRADING AN APPARATUS FOR MOVING CARGO - There is provided an apparatus, method, computer program product, and a kit and method for upgrading, an apparatus for moving cargo. A bus for transmission of electrical energy, at least one load connected to the bus, said at least one load configured to transform electrical energy from the bus into movement of a cargo with respect to the apparatus energy transforming means configured to transform energy between electrical energy of the bus and potential energy of a hydraulic accumulator, wherein the apparatus is configured to store electrical energy from the bus as potential energy to the hydraulic accumulator and to supply the potential energy stored in the hydraulic accumulator as electrical energy to the at least one load. | 05-23-2013 |
| 20130139495 | TRANSMISSION HYDRAULIC CONTROL SYSTEM HAVING AN ACCUMULATOR - A hydraulic control system for actuating at least one torque transmitting device in a transmission includes a sump, a pump in communication with the sump, and an accumulator. A first control device and a second control device control the communication of hydraulic fluid between the pump, the accumulator, and the torque transmitting device. | 06-06-2013 |
| 20130139496 | TRANSMISSION HYDRAULIC CONTROL SYSTEM HAVING AN ACCUMULATOR - A hydraulic control system for actuating at least one torque transmitting device in a transmission includes a sump, a pump in communication with the sump, and an accumulator. A first control device and a second control device control the communication of hydraulic fluid between the pump, the accumulator, and the torque transmitting device. | 06-06-2013 |
| 20130139497 | TRANSMISSION HYDRAULIC CONTROL SYSTEM HAVING AN ACCUMULATOR - A hydraulic control system for actuating at least one torque transmitting device in a transmission includes a sump, a pump in communication with the sump, and an accumulator. A first control device and a second control device control the communication of hydraulic fluid between the pump, the accumulator, and the torque transmitting device. | 06-06-2013 |
| 20130145756 | SYSTEM AND METHOD FOR DETERMINING ACCUMULATOR FILL - A method for determining whether an accumulator is filled to a predetermined level with a hydraulic fluid includes commanding a current to a solenoid, providing pressurized hydraulic fluid to the accumulator, setting a timer to an initial value, incrementing the timer, determining if the timer is greater than a timer threshold value, measuring a current to the solenoid if the timer is greater than the timer threshold value, calculating a modified current as a function of the measured current, the timer value, and the commanded current, comparing the modified current to a threshold, and determining that the accumulator is filled to the predetermined level if the modified current is greater than the threshold. | 06-13-2013 |
| 20130145757 | HYDRAULIC CONTROL SYSTEM - A hydraulic control system comprises: a regulator valve, which regulates a fluid pressure established by an oil pump to an operating pressure required in a control circuit; a signal pressure establishing valve, which applies a signal pressure to the regulator valve to determine a level of the fluid pressure to be established by the regulator valve; and an accumulator, which accumulates the operating pressure to be applied to the control circuit. The hydraulic control system is characterized by: an accumulator control valve, which is arranged between the accumulator and the control circuit, and which is adapted to connect the accumulator with the control circuit when opened, and to disconnect the accumulator from the control circuit when closed; and a signal pressure feeding passage, which delivers the signal pressure established by the signal pressure establishing valve to a signal pressure port of the accumulator control valve thereby actuating the accumulator control valve in accordance with the signal pressure. | 06-13-2013 |
| 20130152571 | VALVE ACTIVATION IN COMPRESSED-GAS ENERGY STORAGE AND RECOVERY SYSTEMS - In various embodiments, valve efficiency and reliability are enhanced via use of hydraulic or magnetic valve actuation, valves configured for increased actuation speed, and/or valves controlled to reduce collision forces during actuation. | 06-20-2013 |
| 20130152572 | VALVE ACTIVATION IN COMPRESSED-GAS ENERGY STORAGE AND RECOVERY SYSTEMS - In various embodiments, valve efficiency and reliability are enhanced via use of hydraulic or magnetic valve actuation, valves configured for increased actuation speed, and/or valves controlled to reduce collision forces during actuation. | 06-20-2013 |
| 20130160440 | Hydraulic System with Pilot Circuit Power Reclamation - A hydraulic system includes a fluid source, a metering valve, an actuator, and a power reclamation assembly. The metering valve includes a standby position, and an actuation position different than the standby position. The metering valve fluidly connects the actuator to the fluid source when in the actuation position. The metering valve fluidly connects the power reclamation assembly to the fluid source when the metering valve is in the standby position. | 06-27-2013 |
| 20130192217 | Hydraulic drive - The invention relates to engineering hydraulics, in particular to hydraulic drives with closed working fluid circulation system used, for example, in mechanical engineering, shipbuilding, machine-tool and aircraft building. The hydraulic drive with closed working fluid circulation system contains a hydraulic accumulator ( | 08-01-2013 |
| 20130213028 | OIL HYDRAULIC SYSTEM FOR MOVING A GATE - An oil-hydraulic system for moving a gate, comprises a double-acting oil-hydraulic cylinder ( | 08-22-2013 |
| 20130213029 | HYDRAULIC SERVO-CONTROL OF A SERVO-CONTROLLED GEARBOX - A hydraulic servo-control of a servo-controlled gearbox comprises hydraulic actuators defining chambers, a storing tank containing control fluid used by the actuators at room pressure, a hydraulic accumulator containing control fluid under pressure, a motor pump drawing the fluid from the tank and feeding it under pressure to the accumulator, and solenoid valves selectively connecting the chambers to the tank and accumulator. The accumulator includes an outer housing defining an inner cylindrical surface defining a first diameter, a piston arranged and axially slidable and mobile inside the housing and defining there a first variable-volume chamber for a gas and second variable-volume chamber for the fluid under pressure, and a limit stopper arranged at an open end of the housing, acting as a striker for the piston, and having an annular circlip defining an opening and overall second diameter approximating by excess the first diameter of the surface of the housing. | 08-22-2013 |
| 20130232963 | DIGITAL HYDRAULIC TRANSFORMER AND METHOD FOR RECOVERING ENERGY AND LEVELING HYDRAULIC SYSTEM LOADS - A hydraulic system that includes a rotating group with a plurality of fluid chambers and a plurality of valve sets that valve a corresponding one of the fluid chambers is disclosed. The hydraulic system may function as a hydraulic transformer. The hydraulic system may transfer energy between a high pressure fluid supply (e.g., from a pump), an accumulator, a hydraulic component (e.g., a hydraulic cylinder, a hydraulic motor, and/or a hydraulic pump-motor), and/or an input/output shaft. The hydraulic system may include a single rotating group with a common axis. Each of the valve sets may include a first valve that fluidly connects to the pump, a second valve that fluidly connects to a tank, a third valve that fluidly connects to the accumulator, and a fourth valve that fluidly connects to the hydraulic component. The valves may have a valving period set to less than half or one-third of a rotational period of the rotating group. The valves may have a frequency of greater than 100 Hertz and may be digitally controlled. | 09-12-2013 |
| 20130269331 | COMPRESSED GAS ENERGY STORAGE SYSTEM - An apparatus comprises an expander comprising a member moveable within a chamber in response to an expanding gas. A linkage is in communication with the member and configured to transmit out of the chamber, a power of the expanding gas. An element effects gas-liquid heat exchange with the expanding gas. The apparatus is configurable in a first mode of operation in which the member moves in response to the expanding gas as a result of combustion within the chamber, and in a second mode of operation in which the member moves in response to the expanding gas in an absence of combustion within the chamber. Also disclosed is a turbomachine where working fluid and plenum are rotated together, reducing losses from velocity shear. Further disclosed is a turbine comprising a nozzle on a rotatable member, where linear velocity of expanding gas from the nozzle substantially matches member rotational velocity. | 10-17-2013 |
| 20130298544 | CONSTRUCTION MACHINE HAVING REVOLVING STRUCTURE - To provide a hybrid type construction machine in which work can be kept on even if the amount of electricity stored in an electric storage device is out of an appropriate value. | 11-14-2013 |
| 20130305701 | HYDRAULIC CIRCUIT AND CONTROL SYSTEM THEREFOR - A hydraulic circuit and a hydraulic control system for preventing fluid leakage and power loss resulting from jamming of contaminants. A first circuit section has an accumulator for storing hydraulic pressure, and a control valve for controlling a passage for delivering fluid from the accumulator to an actuator. Fluid discharged from an oil pump is delivered continuously to a second circuit section. A first filter is disposed on a passage for delivering the fluid from the oil pump to the accumulator for the purpose of removing contaminants finer than those in the fluid to be delivered to the second circuit section from the fluid to be delivered to the accumulator. | 11-21-2013 |
| 20130318955 | ELECTRO-HYDRAULIC SYSTEM FOR RECOVERING AND REUSING POTENTIAL ENERGY - A hydraulic system includes a hydraulic actuator, a pump configured to supply fluid to the hydraulic actuator, and a first accumulator fluidly connected to the hydraulic actuator. The first accumulator is configured to store fluid received from the hydraulic actuator. The hydraulic system also includes a motor drivingly connected to the pump and fluidly connected to the first accumulator. The motor is configured to receive the stored fluid from the first accumulator to drive the pump. The hydraulic system further includes a first discharge valve fluidly connected between the first accumulator and the hydraulic actuator. The first discharge valve is configured to supply the stored fluid from the first accumulator to the hydraulic actuator without the stored fluid from the first accumulator circulating through the pump. | 12-05-2013 |
| 20130327029 | ENERGY STORAGE AND GENERATION SYSTEMS AND METHODS USING COUPLED CYLINDER ASSEMBLIES - In various embodiments, cylinder assemblies are coupled in series pneumatically, thereby reducing a range of force produced by or acting on the cylinder assemblies during expansion or compression of a gas. | 12-12-2013 |
| 20130327030 | APPARATUS FOR RECOVERING ENERGY - Hydraulic apparatus for recovering energy, said apparatus comprising a hydraulic motor, and a high-pressure fluid source and a low-pressure fluid source. The apparatus has: an energy consumption mode, in which the fluid is transferred from the high-pressure fluid source to the low-pressure fluid source while driving the motor in rotation; and an energy accumulation mode, in which, by the action of the motor operating as a pump, the fluid is transferred from the low-pressure source to the high-pressure fluid source. The apparatus further comprises a pressure reducer disposed on a duct interconnecting the two fluid sources. In energy accumulation mode, if the level of the low-pressure source is tending to become excessively low, the reducer opens, enabling fluid to reach the low-pressure fluid source via the first duct. | 12-12-2013 |
| 20130340421 | DEVICE FOR TRANSFERRING A HYDRAULIC WORKING PRESSURE IN A PRESSURE FLUID FOR ACTUATING HYDRAULIC UNITS OF DEEP-SEA SYSTEMS - The invention relates to a device for transferring a hydraulic working pressure in a pressure fluid for pressure actuating hydraulic units of deep sea systems, in particular deepwater wells, wherein a first pressure chamber ( | 12-26-2013 |
| 20140033696 | CONTROL DEVICE FOR HYDROSTATIC DRIVES - The invention concerns a hydrostatic drive with a closed hydraulic fluid circuit comprising a hydraulic motor and a variable displacement pump. A feed pump feeds hydraulic fluid under pressure. A control device regulates pressure to a double-sided servo control unit comprising a control piston in a double-sided control cylinder so that the control piston can open a feed line for hydraulic fluid to one side while opening a discharge line on the other. The control device comprises an actuator at the cylinder by means of which force can be exerted onto the piston. A preload element exerts force onto the piston. The pressure generated by the variable displacement pump returns via a return line such that force is exerted in the direction of the piston, if inactive, the piston is maintained by the preload element and the pressure of the variable displacement pump. | 02-06-2014 |
| 20140053542 | HYDRAULIC SERVO-CONTROL OF A SERVO-CONTROLLED GEARBOX - A hydraulic servo-control of a servo-controlled gearbox comprises hydraulic actuators defining chambers, a storing tank containing control fluid used by the actuators at room pressure, a hydraulic accumulator containing control fluid under pressure, a motor pump drawing the fluid from the tank and feeding it under pressure to the accumulator and solenoid valves selectively connecting the chambers to the tank and accumulator. The accumulator includes an outer housing, a piston arranged and axially slidable and mobile inside the housing and defining there a first variable-volume chamber for a gas and second variable-volume chamber for the fluid under pressure, and a limit stopper arranged at an open end of the housing, acting as a striker for the piston, and having an annular circlip and a perforated plate operatively interposed between the circlip and piston. | 02-27-2014 |
| 20140060030 | HYDRAULIC ACCUMULATOR HEALTH MONITOR - A system and method to diagnose the operational health of a hydraulic accumulator are provided. The system can include a hydraulic accumulator selectively coupled to a hydraulic actuator, such as a swing motor. The accumulator can be charged by movement of the actuator. A pressure sensor can be associated with the accumulator to determine an accumulator pressure. A controller can be connected to the pressure sensor. The controller can determine a charge curve based on a relationship between an actuator operational parameter associated with the actuator movement and the accumulator pressure. The controller can compare the charge curve to a previously defined charge curve or range to determine an error between the charge curve and the previously defined charge curve or range. The degree of the error can be associated with the operational health of the accumulator, and if too large, the operator may be notified of the status. | 03-06-2014 |
| 20140102089 | VALVE OF A STORAGE DEVICE HAVING A SPRING ELEMENT - A valve of an accumulator device, which is formed by an accumulator cylinder and an accumulator piston guided therein, includes a valve sealing body. The valve sealing body is configured to selectively open and close a valve opening at a valve seat. The valve also includes an opening mechanism configured to selectively raise the valve sealing body from the valve seat. The opening mechanism is held by a spring element, and the spring element is formed by a punched and bent part. | 04-17-2014 |
| 20140208733 | Hydrostatic Power Unit To Start An Internal Combustion Engine - A variable displacement hydrostatic power unit ( | 07-31-2014 |
| 20140216023 | PRESSURE ACCUMULATOR - The fixed or variable displacement hydraulic motor-pump ( | 08-07-2014 |
| 20140245728 | Hydraulic Drive System for Work Vehicle - The aim of the present invention lies in providing a hydraulic drive system for a working vehicle, in which pressure oil can be supplied to an accumulator when a working device is raised, and in which, when the working device is held in a raised state, except during loaded travel, lowering of the working device caused by leakage of pressure oil inside a bottom chamber of a hydraulic cylinder into a hydraulic oil tank through a gap in a control valve can be reliably prevented. When a working device ( | 09-04-2014 |
| 20140250878 | ACTUATOR WITH EFFICIENT ENERGY ACCUMULATION - An actuator having efficient energy accumulation with plurality of varying diameter compression springs, pre-compressed with individual or with collective telescopic arrangement. The energy accumulation system requires lesser accommodating volume and is advantageous due to being “buckle” free. | 09-11-2014 |
| 20140260231 | "Substance Dispensing System" - A substance dispensing system that includes a hydraulic drive system is disclosed. The hydraulic drive system includes a hydraulic valve having a variable pressure setting, the hydraulic valve operable between a closed position in which a hydraulic pump moves hydraulic fluid to a hydraulic cylinder and an open position in which the hydraulic pump moves the hydraulic fluid to a hydraulic reservoir. The substance dispensing system of the present disclosure provides a system that recirculates hydraulic fluid in a hydraulic drive system instead of recirculating a substance back to a container via a pump. The substance dispensing system of the present disclosure allows for precise, accurate, and instantaneous control of an external force in a substance dispensing system. | 09-18-2014 |
| 20140260232 | METHODS AND SYSTEMS FOR FLOW SHARING IN A HYDRAULIC TRANSFORMER SYSTEM WITH MULTIPLE PUMPS - To achieve flow demands for high flow services, a hydraulic system shares a flow between a hydraulic transformer and one or more hydraulic pumps. The hydraulic transformer is in selective fluid communication with the pumps and actuates a first load. A second load is driven by an actuator in selective fluid communication with the pumps and the hydraulic transformer. The hydraulic system includes a controller to reduce dynamic responses in the system by causing flow sharing between the hydraulic transformer and a directional flow control valve. | 09-18-2014 |
| 20140338319 | HYDRAULIC HYBRID SAFETY SYSTEM - A hydraulic hybrid safety system is provided. The hydraulic hybrid safety system is part of a hydraulic hybrid system that has an over-center bent-axis rotary pump/motor with a yoke, the yoke having a zero yoke angle and a plurality of non-zero yoke angles. The safety system includes a spring that is operable to move the yoke to the zero yoke angle when the hydraulic hybrid system loses electrical power. | 11-20-2014 |
| 20150047333 | HYDRAULIC ARRANGEMENT FOR SUPPLYING A CONSUMER - A hydraulic arrangement for supplying a consumer or actuator includes a first supply device that has at least one pump with an adjustable delivery volume. The hydraulic arrangement further includes a second supply device that is connected in parallel to the first supply device. The second supply device includes a loadable accumulator and a digitally regulated switching valve arrangement. | 02-19-2015 |
| 20150059326 | INTERNALLY DRAINED HYDRAULIC MOTOR - A hydraulic motor that can be operated in both directions, the hydraulic motor comprising two two-way hydraulic ports each of which can be connected, selectively depending on the direction of rotation in which the motor is to be actuated, either to a source of pressurized liquid or to a device for collecting the liquid at a lower pressure, the hydraulic motor comprising a drain port communicating with an interior space of the motor case, which comprises:
| 03-05-2015 |
| 20150068199 | APPARATUS UTILIZING BUOYANCY FORCES AND METHOD FOR USING SAME - An apparatus has a tank with an open top, a tank wall, and a closed bottom. A first ringwall extends from the bottom such that a first annular space is defined by the first ringwall and the tank wall, and a second annular space is defined by the first ringwall. A second ringwall extends in the second annular space and defines a third annular space between the first ringwall and the second ringwall and further defines a cylindrical space. A conduit extends into the cylindrical space. A pod disposed into the cylindrical space has a closed chamber and a displacement chamber. An inner riser disposed in the third annular space has an open bottom, and an outer riser is disposed in the first annular space and has a closed top, a wall, and an open bottom. | 03-12-2015 |
| 20150337914 | HYDRAULIC SUPPLY APPARATUS - A hydraulic supply apparatus for an automatic or automated transmission of a motor vehicle includes a high-pressure circuit which has a pressure accumulator and is supplied through the use of a high-pressure pump, a low-pressure circuit which is supplied through the use of a low-pressure pump, wherein the high-pressure pump and the low-pressure pump are driven by a common drive unit, and a valve which is provided downstream of the high-pressure pump. The valve has three switching positions, wherein a supply to the high-pressure circuit by the high-pressure pump is possible in the first switching position, and the output end of the high-pressure pump is connected to a reservoir or to the input end of the high-pressure pump in the second switching position. The high-pressure circuit is connected to the reservoir in the third switching position of the valve. | 11-26-2015 |
| 20150361998 | HYDRAULIC SYSTEM WITH ENERGY RECOVERY - A hydraulic system for recovering hydraulic energy, the hydraulic system made of at least: a first actuator for generating hydraulic energy and providing fluid under pressure; a tank line for receiving the fluid under pressure drained from the first actuator; a second actuator driven by the fluid under pressure drained from the first actuator; a recovery line for supplying the fluid under pressure drained from the first actuator. The system further includes a pressure compensating valve which controls flow of fluid in the tank line and maintains a fluid pressure differential across a first directional control valve. The first pressure compensating valve is provided with a first fluid pressure sensing line in communication with the recovery line and a second fluid pressure sensing line in communication with the first actuator. | 12-17-2015 |
| 20150368879 | Combined Hydraulic Implement and Propulsion Circuit with Hybrid Energy Capture and Reuse - An integrated implement actuation and propulsion system for a machine is provided. The system may include: an implement circuit including a first pump and at least one hydraulic implement; a propulsion circuit including a second pump; a hydraulic motor; a brake valve; a back pressure valve; and a combiner valve connected to both the implement circuit and the propulsion circuit, the combiner valve being configured to effect selective fluid communication between the implement circuit and the propulsion circuit. | 12-24-2015 |
| 20150377344 | HYDRAULIC PRESSURE SUPPLY APPARATUS - It is configured to have a first hydraulic pump connected to a drive source, a second hydraulic pump connected to a rotor of the first hydraulic pump, a first regulator valve that regulates pressure of the hydraulic oil discharged from the first hydraulic pump to a third oil passage that connects a discharge port of the first hydraulic pump and a hydraulic actuator, a fourth oil passage that connects the second hydraulic pump and a lubrication system of the hydraulic actuator, a second regulator valve that regulates pressure of the hydraulic oil discharged from the first regulator valve to a pressure lower than a line pressure, and an one-way valve that is installed in a second oil passage connecting the second hydraulic pump and a reservoir and permits supply of hydraulic oil from the reservoir only to the second hydraulic pump. | 12-31-2015 |
| 20160010663 | HYDRAULIC HYBRID SWING DRIVE SYSTEM FOR EXCAVATORS | 01-14-2016 |
| 20160032945 | HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE - The present disclosure relates to a hydraulic system for a construction machine, and more particularly, to a hydraulic system for a construction machine including a plurality of actuators, in which each of the actuators includes a pump/motor, is operated under a control of a corresponding pump/motor, and stores working oil in an accumulator or receives the working oil supplemented from the accumulator in accordance with a difference between a flow rate entering the actuator and a flow rate discharged from the actuator. | 02-04-2016 |
| 20160053781 | HYDRAULIC SYSTEM WITH SUPPRESSOR UNIT - A hydraulic system with a suppressor unit is provided. The hydraulic system includes a reservoir and a hydraulic pump. The hydraulic pump supplies the fluid at a predefined pressure. The hydraulic system includes a hydraulic actuator connected to the hydraulic pump. The hydraulic system also includes a suppressor unit disposed between the hydraulic pump and the hydraulic actuator. The suppressor includes a housing member and a resilient member. The housing member includes a wall member having an inner wall surface and an outer wall surface. The resilient member is disposed within the wall member. The resilient member includes a body having an inner surface and an outer surface. The inner surface defines a passage for fluid flow therethrough. The outer surface includes at least one protrusion having an end surface. The end surface abuts to the inner wall surface of the housing member. | 02-25-2016 |
| 20160053782 | STORAGE AND DELIVERY OF SUPPLEMENTAL POWER - A power train and related vehicle are described for storage and delivery of supplemental power. A power conversion device may receive power from an engine or other component of a vehicle and may provide power to an energy storage device. A supplemental power device may receive power from the energy storage device and provide power to a supplemental power coupling via a one-way power transfer device. The supplemental power coupling may provide the power from the supplemental power device, as received via the one-way power transfer device, to a crank shaft or other component of the vehicle. | 02-25-2016 |
| 20160061233 | ELECTRIC HYDRAULIC ACTUATOR - There is set forth herein an actuator having a housing and a piston assembly. The piston assembly can have a piston and a piston rod extending from the piston. In one embodiment, the housing can receive the piston and a portion of the piston rod. The piston assembly can define a piston assembly interior and a fluid reservoir can be located within the piston assembly interior. A chamber region within the interior of the housing can be separated by the piston assembly to define a piston side chamber and rod side chamber. The piston assembly can be moveable so that respective volumes of each of the piston side chamber and the rod side chamber are variable. For operation of the actuator by movement of the piston assembly within the interior of the housing, fluid can be moved between the reservoir and the chamber region. | 03-03-2016 |
| 20160061235 | HYBRID CONSTRUCTION MACHINE - A hybrid construction machine detects the voltage of each cell that forms a battery, calculates a difference voltage between the detected voltage and a predetermined upper-limit working voltage, selects the lower one of the calculated difference voltage and a stored difference voltage, corrects an upper-limit working charging rate to decrease as the selected difference voltage decreases, and controls charging of the battery, based on the corrected upper-limit working charging rate. | 03-03-2016 |
| 20160091000 | DEVICE FOR THE STORAGE AND GENERATION OF POWER | 03-31-2016 |
| 20160123308 | GRAVITATIONAL ENERGY SYSTEM - A gravitational energy system for generating gravity-driven hydraulic pressure for residential and commercial energy use is provided. The gravitational energy system may be a hydraulic fluid-filled circulatory system providing a storage tank, a mass-lifting tank, a hydraulic accumulator tank and at least one hydraulic motor positioned in a descending gravitational hierarchy, respectively. The hydraulic accumulator tank may pressurize a hydraulic fluid by a predetermined mass moving from a receiving position to a pressurizing position, wherein the predetermine mass is moved to the receiving position by being operably engaged with the mass-lifting tank. The gravitational energy system may include a control circuitry configured to control the flow of the hydraulic fluid through the circulatory system by operating electronically interconnected sensors and conduit valves. | 05-05-2016 |
| 20160138711 | Booster Device Comprising A Hydraulic Motor Driving A Booster Pump - A booster device for a hydraulic circuit comprising a high-pressure circuit ( | 05-19-2016 |
| 20160153473 | SHOVEL | 06-02-2016 |
| 20160168822 | HYDRAULIC HYBRID SWING DRIVE SYSTEM FOR EXCAVATORS | 06-16-2016 |
| 20160186785 | HYDRAULIC ENERGY RECOVERY SYSTEM - The invention relates to a hydraulic energy recovery system ( | 06-30-2016 |
| 20160252179 | HYDRAULIC SYSTEM FOR TRANSMISSION ASSEMBLY | 09-01-2016 |
| 20180023701 | HYDRAULIC PRESSURE SUPPLY SYSTEM OF DUAL CLUTCH TRANSMISSION FOR VEHICLE | 01-25-2018 |
| 20220136535 | Hydraulic Circuit including Hydraulic Decompression Energy Reclamation - A hydraulic circuit includes a prime mover that is configured to generate an oscillating flow of hydraulic fluid, and an actuator that is driven by the prime mover and configured to provide oscillating motion and to be connected to a load in each direction of the motion. The hydraulic circuit also includes a reclamation device that is disposed in the hydraulic circuit between the prime mover and the actuator. The reclamation device captures and stores a portion of hydraulic fluid displaced from the actuator during a transition between opposed motions, where the portion of hydraulic fluid corresponds to an amount of hydraulic fluid equal to a volume of fluid required to compensate for compression of fluid within the hydraulic circuit due to system pressure and load pressure. The stored fluid is used by the circuit in a subsequent motion. | 05-05-2022 |
