Matches 1 - 50 out of 74 1 2 >


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US20150252554 HYDRAULIC DRIVE SYSTEM FOR CONSTRUCTION MACHINE  
During boom-midair lowering operation in which a front work implement 130 can be turned under the self-weight of a boom 131, a hydraulic pump/motor 7 is operated as a motor to operate a...
US20150225929 SHOVEL  
A shovel may be provided with a main pump, hydraulic actuators including a swing hydraulic motor, a control valve that controls a flow of a working oil between the main pump and the hydraulic...
US20150020511 METHOD FOR ENERGY RECOVERY OF HYDRAULIC MOTOR  
A method to recover energy in a reversible hydraulic motor system during a motor reverse event is disclosed. A swashplate of a hydraulic motor is pivoted over a center position when the hydraulic...
US20130152565 HYDRAULIC SYSTEM HAVING ENERGY RECOVERY  
A hydraulic system for a machine is disclosed. The hydraulic system may have a pump configured to pressurize fluid, a swing motor driven by pressurized fluid to swing a body of the machine...
US20140245729 HYDRAULIC CONTROL DEVICE AND OPERATING MACHINE HAVING THE SAME  
A hydraulic control device includes: a recovery oil passage; a regenerative motor that rotates an output shaft of an engine in response to a supply of the hydraulic fluid and is driven to rotate...
US20150192148 HYDRAULIC CIRCUIT FOR WORKING MACHINE, COMPRISING ACCUMULATOR  
The present invention relates to a hydraulic circuit for a working machine including: a hydraulic actuator; and an accumulator for accumulating hydraulic energy which is discharged from the...
US20140373522 HYDRAULIC HYBRID SWING DRIVE SYSTEM FOR EXCAVATORS  
A swing drive system (11) for an excavator is provided which utilizes a prime mover (20) mechanically connected to a first hydraulic pump/motor (30) and a second hydraulic pump/motor (32)...
US20140026550 HYDRAULIC ENERGY RECOVERY SYSTEM  
A machine includes a hydraulic cylinder configured to raise and lower a boom of the machine, and an accumulator selectively fluidly connected to the hydraulic cylinder. The accumulator is...
US20140325975 SWING RELIEF ENERGY REGENERATION APPARATUS OF AN EXCAVATOR  
Disclosed is a swing relief energy regeneration apparatus in which working oil relieved into a hydraulic tank is stored in a pressure accumulator during swing and deceleration to recycle the...
US20140119868 ENERGY RECOVERY SYSTEM HAVING PEAK-SHAVING ACCUMULATOR  
An energy recovery system for a machine is disclosed. The energy recovery system may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, an actuator, and an...
US20130160436 ELECTRO-HYDRAULIC TRACTION SUPPORT  
A traction control system comprises a wheel hydraulic motor and pump assembly selectively connectable to a wheel for a vehicle to provide drive to the wheel. An electronic control unit is...
US20060075749 HYDRAULIC ENERGY INTENSIFIER  
Hydraulic circuits used to manipulate tools in, for example construction equipment, uses less power for a retraction of a hydraulic cylinder than for an extension of that cylinder. Provided is a...
US20130239559 HYDRAULIC HYBRID VEHICLE  
A pump motor of a hydraulic hybrid system also serves as a pump to supply hydraulic oil or lubricating oil to a power train, thus enabling elimination of an oil pump provided in the power train...
US20140060024 HYDRAULIC CONTROL SYSTEM HAVING SWING MOTOR RECOVERY  
A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, a swing motor, and at least one control valve configured to control fluid flow...
US20150082783 ENERGY REGENERATION TYPE FORKLIFT HYDRAULIC SYSTEM  
An energy regeneration type forklift hydraulic system is provided, which includes a first oil pump, a first electrical motor, a multiple directional control valve, a lifting oil cylinder, a...
US20140208728 Method and Hydraulic Control System Having Swing Motor Energy Recovery  
A hydraulic control system includes a swing control valve between a pump and a swing motor to control flow to/from the swing motor, and a selector valve between an accumulator and the swing motor...
US20150247509 MACHINE HAVING HYDRAULIC START ASSIST SYSTEM  
A hydraulic system is disclosed for assisting starting of a machine having an engine. The hydraulic system may include a work tool, a pump driven by the engine to pressurize fluid, and an actuator...
US20090229902 REGENERATIVE SUSPENSION WITH ACCUMULATOR SYSTEMS AND METHODS  
In exemplary embodiments, a regenerative suspension system replaces or complements a standard shock absorber on a vehicle. A pump attaches via a hose to a central accumulator cylinder that is...
US20070175209 Hydraulic system having in-sump energy recovery device  
A hydraulic energy recovery device for a hydraulic system is disclosed. The hydraulic energy recovery device has a first impeller configured to receive a flow of pressurized liquid, and a second...
US20120240567 HYDRAULIC TRANSMISSION DEVICE ALLOWING ENERGY RECOVERY  
An hydraulic transmission device (10,110) comprising an hydraulic motor (16, 18), an hydraulic pump (20), a fluid accumulator (22). The device has an accumulator-driven mode, an energy-recovery...
US20140090367 POWER REGENERATION DEVICE FOR OPERATING MACHINE  
A power regeneration device for an operating machine has a hydraulic cylinder and a return line through which fluid returning to a tank flows when the hydraulic cylinder contracts. The return line...
US20140174069 HYDRAULIC CONTROL SYSTEM HAVING SWING MOTOR ENERGY RECOVERY  
A hydraulic control system for a machine is disclosed. The hydraulic control system may have a tank, a pump, a swing motor having a first chamber and a second chamber, and at least one control...
US20150204356 Hydrostatic Drive System  
A hydrostatic drive system (1) with a hydrostatic pump (3) driven by a drive motor (2) and connected in a closed circuit with a hydrostatic motor (4). The hydrostatic motor (4) is connected with a...
US20110219761 Integral accumulator/reservoir system  
An integral accumulator/reservoir system including a low pressure vessel having a low-pressure vessel wall defining a low-pressure vessel cavity; a high-pressure accumulator having a high-pressure...
US20140318115 SYSTEM FOR IMPROVING THE ENERGY EFFICIENCY IN HYDRAULIC SYSTEMS, PISTON ACCUMULATOR AND PRESSURE ACCUMULATOR PROVIDED FOR SUCH A SYSTEM  
The invention relates to a system for improving the energy efficiency in hydraulic systems, comprising an actuator (49) which, in an operating state, operates as a consumer of hydraulic energy...
US20090217653 Control system for recovering swing motor kinetic energy  
This disclosure relates to a hydraulic system and method that converts the kinetic energy generated by the operation of a swing motor into hydraulic potential energy and reuses the hydraulic...
US20090151345 BRAKE SYSTEM FOR VEHICLE HAVING REGENERATIVE BRAKING FUNCTION  
A brake system of a vehicle with a regenerative braking function, such as a hybrid electric vehicle. A regenerative braking hydraulic pressure line connects a master cylinder with a wheel...
US20130118159 HYDROSTATIC HYDRAULIC HYBRID SYSTEM  
A hybrid drive system in a vehicle includes a prime mover, a starting device connected to the prime mover, and a transmission having a transmission input shaft connected to the starting device. A...
US20140283509 POWER REGENERATION DEVICE FOR WORKING MACHINE AND WORKING MACHINE  
In a lowering operation of a boom, the amount of operation of a control lever is detected by a pressure sensor and input to a controller. Based on the input operation amount, the controller...
US20130111890 HYDRAULIC START/STOP SYSTEM  
A start/stop arrangement in a fluid system comprising a controllable pump unit for supplying fluid pressure to at least one implement; a prime mover connected to a transmission device arranged to...
US20100300085 DRIVE SYSTEM  
The invention relates to a drive system (1) having a travel drive, a working hydraulic system (3) and a device for hydrostatic braking (4). The device for hydrostatic braking has a first...
US20100170237 Hydraulic Circuit For A Regenerative Drive Assembly  
An assembly (10) forming part of a regenerative drive system for a motor lorry. The motor lorry has a driven train that is operatively associated with the assembly (10) so as to cause operation of...
US20090077837 WORK MACHINE  
A boom control circuit for controlling hydraulic fluid fed to a boom cylinder is provided separately and independently from a travel/stick/bucket control circuit, which serves to control hydraulic...
US20080282700 Compressed working fluid supply system for an expansion engine  
A compressed working fluid supply system including a power source, a liquefier in communication with the power source and a refrigerant, a circulator in communication with the power source and the...
US20150165887 Hydrostatic Drive With Energy Storage  
A hydrostatic drive has a hydrostatic pump (3) driven by a drive motor (2) and connected in a closed circuit with a hydrostatic motor (4). The closed circuit is formed by a first hydraulic...
US20120180470 HYDRAULIC SYSTEM FOR ENERGY REGENERATION IN A WORK MACHINE SUCH AS A WHEEL LOADER  
A hydraulic system is adapted to recover potential and kinetic energy of a work attachment of a work machine. A valve arrangement may configure the hydraulic system in various modes. The hydraulic...
US20120192553 ENERGY-EFFICIENT HYDRAULIC DRIVE FOR THE LINEAR MOVEMENT OF A MASS  
Hydraulically driven arrangement for the linear movement of a mass body consisting of two double acting cylinders coupled in parallel, whereby one operating cylinder is a control cylinder for...
US20130219875 HYDRAULIC ENERGY RECOVERY SYSTEM WITH DUAL-POWERED AUXILIARY HYDRAULICS  
A power transfer system for a vehicle that comprises a an internal combustion engine, one or more drive wheels, and power transfer apparatus transfers power from the prime mover to the wheels for...
US20110271669 HYBRID CONSTRUCTION MACHINE  
A hybrid construction machine includes a control valve provided in a flow passage that connects an actuator to a regenerative hydraulic motor, an opening of which is controlled by a pilot pressure...
US20080250781 Method of Controlling a Hydrostatic Drive  
The invention relates to a method of controlling a hydrostatic drive (1). Said hydrostatic drive (1) comprises a hydraulic pump (3) and a hydraulic engine (7). Said hydrostatic drive (1) also...
US20100018195 Piece of Working Equipment  
The present invention relates to a piece of working equipment, in particular to an excavator or to a machine for the transfer of material, having an element movable via at least one working...
US20130061588 METHOD AND APPARATUS FOR RECOVERING INERTIAL ENERGY  
A hydraulic system adapted to recover inertial energy is disclosed. The hydraulic system includes a pump, a variable displacement pump/motor having an input/output shaft, an accumulator, and a...
US20080295507 Drive Having an Energy Recovery and Retarder Function  
The invention relates to a drive with an energy recovery and retarder function. The drive (1) comprises a hydrostatic piston engine (12) which is connected to an accumulator (16) for storing...
US20140325974 HYDRAULIC HYBRID SYSTEM FOR ROTATORY APPLICATIONS  
A hydraulic hybrid system for rotatory applications having an actuator (49, 91) in the form of a motor pump unit (91), which is coupled to a rotatory-operating device (94), such as a traction...
US20130061587 SYSTEM AND METHOD FOR RECOVERING ENERGY AND LEVELING HYDRAULIC SYSTEM LOADS  
A hydraulic system including an accumulator and a hydraulic transformer is disclosed. The hydraulic transformer includes first and second variable displacement pump/motor units mounted on a...
US20100307146 Pressure Accumulator, in Particular Pulsation Damper  
A pressure accumulator, in particular a pulsation damper, having an accumulator homing (1) which defines a longitudinal axis (3) and has an inflow opening (15), and an outflow opening (17) for a...
US20150152889 SYSTEM FOR IMPROVING THE ENERGY EFFICIENCY IN HYDRAULIC SYSTEMS  
The invention relates to a system for improving the energy efficiency in hydraulic systems, comprising at least one working cylinder (58) which, in an operating state, operates as a consumer of...
US20090173066 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...
US20090120084 Hydraulic Unit  
Hydraulic unit, in particular for lifting and lowering loads in stacking trucks having at least one working cylinder (10), the piston/rod unit (12) of which is guided movably in a housing (22)...
US20100276221 ENERGY STORAGE SYSTEM FOR A HYBRID VEHICLE  
An energy storage system for a hybrid vehicle, with an internal combustion engine having an output shaft, includes a reservoir containing working fluid, a reversible pump/motor in fluid...

Matches 1 - 50 out of 74 1 2 >