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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...
US20120145486 HYDRAULIC APPARATUS  
The invention relates to a hydraulic apparatus comprising a hydraulic pump (30) which is connectable to a hydraulic fluid tank, an electric motor (2) as a drive means for the hydraulic pump (30),...
US20130028695 HYDRAULIC CIRCUIT AND WORKING MACHINE INCLUDING THE SAME  
A working machine hydraulic circuit, including: a hydraulic motor; a pilot pressure system configured to supply hydraulic fluid at a pilot pressure to one or more components of the working...
US20110072811 ENGINE DRIVEN LIFT GATE POWER SYSTEM  
A power system for a lift gate is provided. The power system includes an actuator system including an actuator for a lift gate, and a lift gate engine coupled to the actuator system. The lift gate...
US20140075928 HYDRAULIC CONTROL MANIFOLD ASSEMBLY  
A hydraulic manifold assembly for hydraulic equipment is provided. The hydraulic manifold assembly includes a hydraulic manifold. The hydraulic manifold includes at least four control valves...
US20130111892 MIXER DRUM DRIVING DEVICE  
A mixer drum driving device includes a hydraulic motor that rotates a mixer drum, a first hydraulic pump that is driven by an engine to be capable of supplying working oil to the hydraulic motor,...
US20140318113 CUSHIONED SWING CIRCUIT  
A cushioned swing circuit provides the reduction of oscillation common in the operation of heavy equipment such as with boom members. The circuit utilizes a transfer of high pressure fluid flow...
US20110225962 Variable Speed Hydraulic Pump Apparatus and Method  
An embodiment in accordance with the present invention provides a hydraulic pump including a first motor running at a fixed speed, a reservoir for fluid and a first pump operatively coupled to the...
US20150240450 SHOVEL  
A shovel may be provided with a swing hydraulic motor, a relief valve provided on the swing hydraulic motor, and an accumulator part that supplies to the swing hydraulic motor a working oil having...
US20120304636 HYDRAULIC FAN CIRCUIT  
A hydraulic fan circuit includes a primary pump, a motor fluidly connected to the primary pump, and a fan operably connected to and driven by the motor. The circuit also includes a supply passage...
US20140190158 HYDRAULIC CIRCUIT, AND COMBINATION VALVE USED IN SAME HYDRAULIC CIRCUIT  
A composite valve is used in a hydraulic circuit. The composite valve is interposed between a stack valve and a hydraulic power supplier and between the stack valve and a multifunction valve...
US20120131913 HYDRAULIC SWING-CONTROLLING APPARATUS OF WORK MACHINE  
In a work machine including a hydraulic pump (1), a swing motor (2), and swing relief valves (3a and 3b), the amount of the swing operation (P1) related to the swing motion of the swing motor (2)...
US20120324877 SYSTEM FOR DRIVING A BOOM OF A HYBRID EXCAVATOR AND A CONTROL METHOD THEREOF  
Disclosed are a system for driving a boom of a hybrid excavator, and a method for controlling same. The disclosed system comprises: an electric motor operating by means of a motor or generator; a...
US20150197915 Boom Cylinder Dig Flow Regeneration  
A hydraulic system and methods for conserving energy in such system is disclosed. The hydraulic system includes a hydraulic actuator having a head end, a rod end and a piston disposed...
US20130227941 PRESSURE INTENSIFIER FOR DISCHARGING FLUID AT CONSTANT FLOW RATE  
A pressure intensifier for ejecting fluid at a constant flow rate includes a hydraulic pump, a hydraulic motor, a supply channel, a first control unit, and a second control unit. The hydraulic...
US20120124988 HYDRAULIC FAN CIRCUIT HAVING ENERGY RECOVERY  
A hydraulic fan circuit is disclosed. The hydraulic fan circuit may have a primary pump, a motor, a fan connected to and driven by the motor, and a flywheel connected to and driven by one of the...
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...
US20130291531 HYBRID EXCAVATOR BOOM ACTUATING SYSTEM AND METHOD FOR CONTROLLING SAME  
The present disclosure relates to a hybrid excavator boom actuating system and to a method for controlling the same. The boom actuating system comprises: an electric motor serving as a motor or a...
US20120285565 Spring Brake Valve  
Methods and valve arrangements for controlling the flow of pressurized air from a tractor to a trailer reservoir and to a trailer spring brake chamber. In one exemplary embodiment, pressurized air...
US20130067900 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...
US20130000293 HYDRAULIC SYSTEMS UTILIZING COMBINATION OPEN- AND CLOSED-LOOP PUMP SYSTEMS  
A pump system includes a closed-loop fluid circuit and an open-loop fluid circuit. The closed-loop fluid circuit includes a motor for rotating a first component connected to the closed-loop fluid...
US20130036728 PUMP SUCTION CHARGING SYSTEM  
Disclosed are hydraulic pump systems and pump suction charging systems which reduce or eliminate cavitation in the systems, as well as methods of operating the same and work machines including 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...
US20120067039 INDUSTRIAL MACHINE  
A three-dimensional measuring machine (industrial machine) includes an air supplier supplying air; a drive mechanism driven by the air supplied from the air supplier; an electromagnetic valve...
US20140123640 CONSTRUCTION MACHINE  
A construction machine including: a swivel motor; a working attachment having a boom, a boom cylinder, an arm and an arm cylinder; a hydraulic actuator circuit having a first circuit including the...
US20130213023 HYDRAULIC SYSTEM HAVING LOW-SPEED OPERATING MODE  
A hydraulic system is disclosed for use with a machine. The hydraulic system may have a tank, a motor with a fluid inlet and a fluid outlet, and a pump configured to draw fluid from the tank and...
US20130312402 HYDRAULIC SYSTEM FOR WORK MACHINE  
Provided is a hydraulic system for a work machine, which can ensure low temperature responsiveness of remote control valves that perform pilot operations of pilot operated directional control...
US20130133972 SYSTEM AND METHOD FOR CONTROLLING HYDRAULIC SYSTEM BASED ON TEMPERATURE  
A hydraulic system includes a hydraulic transmission including a hydraulic pump configured to be coupled to a prime mover, a hydraulic motor configured to be coupled to an output shaft, and fluid...
US20120144819 HYBRID WORKING MACHINE  
A hybrid working machine includes an engine, an assist motor configured to assist the engine, a hydraulic pump driven by the engine, an electric power accumulating unit configured to feed the...
US20090293470 Over-Loading Prevention Device of Construction Machinery  
In an over-loading prevention device including a hydraulic pump, a control valve, and a control lever, a discharge-quantity control unit performs constant-torque control which decreases a...
US20090282824 CONCRETE AGITATING DRUM DRIVING DEVICE  
A concrete agitating drum (1) is driven by a hydraulic motor (81). A connection switch-over valve (20) is arranged to have a function to regulate a flow cross-sectional area of pressurized working...
US20140157774 COMPRESSOR BYPASS TURBINE-GENERATOR  
Embodiments for a turbine-generator position in a compressor bypass flow path are presented. In one example, a method for an engine having a compressor comprises generating energy via a...
US20140260223 System And Method For Controlling Pump Performance In A Transmission  
The present disclosure provides a hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a...
US20150152900 CONTROL SYSTEM FOR CONSTRUCTION MACHINE  
A control system for a construction machine includes: a boom cylinder; a boom switching valve; a fluid pressure motor adapted to drive a motor generator by being rotated by means of a return fluid...
US20150135694 Gearbox Hydraulic Circuit  
A gearbox hydraulic circuit includes a hydraulic pump connected to a fluid reservoir to generate a flow of pressurised fluid. A pressure circuit connected to the hydraulic pump conveys the flow of...
US20120324875 OPTIMIZED SYSTEM RESPONSE WITH MULTIPLE COMMANDS  
A method and system for operating a machine having first and second movable elements, first and second hydromechanical movers for moving the first and second movable elements, respectively, and...
US20140083092 HYDRAULIC CIRCUIT FOR CONSTRUCTION EQUIPMENT  
A hydraulic circuit for construction equipment is provided, which supplements hydraulic fluid of a hydraulic pump for a cooling fan and hydraulic fluid of a main hydraulic pump and uses the...
US20120312007 CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE  
A control system for construction machine includes a pair of first and second main pumps which are variable-displacement pumps, first and second circuit systems connected to the first and second...
US20130291527 Hydraulic Power Control System and Method  
A method and apparatus for controlling a hydraulic power system that includes a hydraulic motor and a hydraulic pump configured to supply hydraulic fluid to the hydraulic motor is provided. A...
US20130167521 INDUSTRIAL VEHICLE  
A forklift (1) according to the present invention includes: an engine (7); a hydraulically-operated device for cargo handling (2); a pump for cargo handling (5) that is driven by the engine (7);...
US20140124299 ELECTRO-HYDRAULIC ACTUATOR (EHA) FOR PALLET TRUCK  
An improvement to the component based hydraulic systems is an integrated electro-hydraulic actuator (EHA) that contains all components necessary to achieve power up, gravity return actuation of a...
US20110154815 SWING MOTOR CONTROL METHOD IN OPEN CENTER TYPE HYDRAULIC SYSTEM FOR EXCAVATOR  
A swing motor control method in an open center type hydraulic system for a hydraulic excavator is provided, which can adjust the speed of a swing motor so that a swing device and a working device...
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...
US20140366518 HYDRAULIC SYSTEM OF CONSTRUCTION MACHINE  
The present disclosure relates to a hydraulic system of a construction machine. The hydraulic system of the construction machine includes: an electronic proportional pressure reducing valve...
US20130318959 Hydraulic Circuits with Energy Conservation Features for Overrunning Load Conditions  
A hydraulic system is disclosed that includes a hydraulic actuator having a head end, a rod end and a piston disposed therebetween. The system also includes a pump configured to supply fluid to...
US20090235658 INERTIAL BODY DRIVE SYSTEM  
A pressure selector valve (13) is provided between a hydraulic motor (1) and a directional control valve (5) to connect one of the main conduits (4A), (4B) on a high pressure side to a high...
US20110289912 ELECTRO-HYDRAULIC ACTUATOR  
An electro-hydraulic actuator (EHA) includes a hydraulic circuit having a plurality of pressure compensated flow control valves for allowing a maximum flow rate through the fluid conduits...
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...
US20120204548 Cold Start Valve  
Parasitic hydraulic loading on an engine is significantly reduced during cold starts by using an unloader valve to divert the flow of hydraulic fluid from a hydraulic pump to a hydraulic actuator,...
US20130081382 REGENERATION CONFIGURATION FOR CLOSED-LOOP HYDRAULIC SYSTEMS  
A hydraulic system is disclosed. The hydraulic system may have a pump, and a hydraulic actuator having a first chamber and a second chamber. The hydraulic system may also have a first pump passage...

Matches 1 - 50 out of 232 1 2 3 4 5 >