Matches 1 - 47 out of 47


Match Document Document Title
US20140119867 ENERGY RECOVERY SYSTEM HAVING INTEGRATED BOOM/SWING CIRCUITS  
An energy recovery system for a machine is disclosed. The energy recovery system may have a boom circuit with at least a one linear actuator configured to move a work tool, and a boom accumulator...
US20150096290 HYDRAULIC SYSTEM  
A hydraulic system, preferably for actuating and engaging a mobile slurry pump, includes a primary circuit, actuating a first hydraulic consumer, which circuit has a hydraulic drive assembly...
US20140165549 HYDRAULIC SYSTEM HAVING MULTIPLE CLOSED LOOP CIRCUITS  
A hydraulic system is disclosed. The hydraulic system may have a first pump, a boom cylinder, and a first closed loop fluidly connecting the first pump to the boom cylinder. The hydraulic system...
US20150113970 HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINERY  
Disclosed is a hydraulic system for performing land preparation works by means of a simultaneous boom-up and arm-in operation. The hydraulic system according to the present invention includes: an...
US20120079821 EXCAVATOR DRIVE SYSTEM WITH BI STATE MOTOR TRANSFER SWITCHES  
An excavator drive system wherein one of a pair of propulsion motors shares one of a pair of inverter power sources with another of a pair of motors dedicated to crowd and hoist motions. A pair of...
US20120186243 HYDRAULIC SYSTEM HAVING AT LEAST ONE DRIVE MACHINE  
The invention relates to a hydraulic system having a pump and at least two working machines, in particular two working machines embodied as hydraulic cylinders. Each working machine is connected...
US20090057049 HYDRAULIC TRAVELING VEHICLE  
A hydraulic traveling vehicle includes a right-travel motor a left-travel motor, a hydraulic pump, a merging/diverging valve and a travel switching unit. The merging/diverging valve is configured...
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...
US20100083649 Configurable Hydraulic System  
A configurable hydraulic system facilitates a variety of oilfield cementing and other oilfield or related applications. The system employs a plurality of prime movers to drive a plurality of...
US20080289325 Traveling device for crawler type heavy equipment  
A traveling device for crawler type heavy equipment is provided, which can improve the manipulability by preventing an abrupt decrease/increase of a traveling speed of the equipment when a...
US20130111888 TORQUE OUTPUT CONTROL FOR SWING PUMP  
A hydraulic circuit including a hydraulic swing motor having a first port and a second port. A first motor conduit connected to the first port of the hydraulic swing motor, and a second motor...
US20090056325 HYDRAULIC FLOW CONTROL SYSTEM  
A hydraulic system for use in a work vehicle with a powered implement is disclosed. In one embodiment, the hydraulic system may include a first hydraulic circuit including a first hydraulic pump...
US20150246794 BOOM TELESCOPE SYNCHRONIZING & SEQUENCING CONTROL  
An extension boom system for heavy equipment having, the extension boom system including a first actuator mounted on a base, and connecting a second stage, a second actuator mounted on the second...
US20090000291 Arrangement and Method for Delivering Hydraulic Fluid in a Work Vehicle  
An arrangement for delivering hydraulic fluid to at least one hydraulic actuator of a work vehicle for moving a work implement and/or steering the vehicle includes at least two pumps which are...
US20090056324 Hydraulic control device of construction machinery  
A hydraulic control device of construction machinery having a main merging/diverging valve interposed in a connecting oil path connecting discharge oil paths of first and second hydraulic pumps in...
US20080229738 Hydraulic circuit to prevent bucket separation from bucket rest during traveling of heavy equipment  
A hydraulic circuit is provided, which can prevent the bucket from being separated from the bucket rest by preventing a change of stroke of a boom cylinder or an arm cylinder during long traveling...
US20120233996 SYSTEM FOR ALLOCATING FLUID FROM MULTIPLE PUMPS TO A PLURALITY OF HYDRAULIC FUNCTIONS ON A PRIORITY BASIS  
A valve assembly has a flow summation node coupled to a displacement control port of the first pump. Each valve in the assembly has a variable metering orifice controlling flow from an inlet to a...
US20110192155 Hydraulic Drive Device for Hydraulic Excavator  
The operability when performing a combined arm-crowd and bucket operation can be improved. A hydraulic drive device for a hydraulic excavator includes: a bucket directional control valve and a...
US20090183505 PARALLEL FLOW CRYOGENIC LIQUIFIED GAS EXPANDERS  
One or more cryogenic liquefied gas expanders are configured within one or more containment vessels with parallel flow through the expanders, where cryogenic fluid enters through a common inlet...
US20080236154 Hydraulic circuit for construction equipment  
A hydraulic circuit for construction equipment is disclosed, which can prevent an abrupt rotation of a swing device when a switching valve for the swing device is shifted in a state that switching...
US20140174064 HYDRAULIC CONTROL SYSTEM FOR SWING MOTOR  
A hydraulic control system for a machine is disclosed. The hydraulic control system includes a swing control valve coupled between the swing motor, the pump and the tank to selectively control a...
US20140174065 HYDRAULIC CONTROL SYSTEM FOR SWING MOTOR  
A hydraulic control system for a machine is disclosed. The hydraulic control system includes a swing control valve coupled between the swing motor, the pump and the tank to selectively control a...
US20120180472 Fixed/variable hybrid system  
A fixed/variable hybrid system has modified constant flow open center hydraulic valves (“fixed/variable valves”), including an open center core, spools, a power core, and a tank galley. A small...
US20150044007 HYDRAULIC CONTROL DEVICE AND CONSTRUCTION MACHINE PROVIDED WITH SAME  
A hydraulic control device that reduces the loss of the power of a pump in combined operation of boom lowering and arm pushing. A controller performs single control of increasing capacity of a...
US20150196953 INJECTION APPARATUS  
In an injection apparatus, a first cylinder and second cylinder for driving an injection cylinder connected to an injection plunger are connected in parallel with each other with respect to the...
US20150240455 Hydraulic Driving System for Construction Machine  
Control valves 100f, 100g, and 100h that reduce flow passage areas of parallel hydraulic fluid lines 41f, 41g, and 41h respectively when operating devices 34a, 34b for traveling are operated, are...
US20100043421 METHOD FOR OPERATING A HYDRAULIC SYSTEM, AND HYDRAULIC SYSTEM  
A method for operating a hydraulic system having at least one supply device, in particular a hydraulic pump (39)), which supplies different hydraulic consumers is characterized in that a...
US20100037603 HYDRALIC TWO-CIRCUIT SYSTEM AND INTERCONNECTING VALVE SYSTEM  
A hydraulic two-circuit system (2, 4) for activating consumers (A1, B1; A2, B2; A3, B3) of a mobile unit, for example a track-laying unit, and an interconnecting valve arrangement (38), which is...
US20130042602 Power Train For a Hybrid Vehicle  
The invention relates to a power train for a hybrid vehicle, comprising two hydraulic machines (20, 22) including variable displacement, both of which are connected to a hydraulic pressure...
US20120240565 SHIFT CYLINDER, DRIVE DEVICE, WORK MACHINE AS WELL AS METHOD FOR OPERATING A WORK MACHINE  
The invention relates to a shift cylinder including a cylinder element having a working space, a first and a second piston received in the working space displaceably relatively to it, by which the...
US20150219127 HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINERY  
A hydraulic system for a construction machine is provided, which enables a user to set or release a preferential function when an excavation work or leveling work using an excavator is performed....
US20150089935 CONTROL VALVE APPARATUS OF POWER SHOVEL  
A control valve apparatus includes a second-working-actuator acceleration control valve connected to a first working control valve in parallel. The second-working-actuator acceleration control...
US20080302097 Hydraulic Unit  
The invention relates to a hydraulic group comprising a reservoir (28) for oil, in which a multiple piston pump (60) is arranged. The individual pumps (61) are cyclically driven by an eccentric...
US20110283691 MULTIPLE FLUID PUMP COMBINATION CIRCUIT  
A method of combining outputs of a plurality of fluid pumps includes receiving an input signal from an input device. The input signal is adapted to control a function of a work vehicle. An...
US20090071141 HYDRAULIC CIRCUIT FOR HEAVY EQUIPMENT  
A hydraulic circuit for heavy equipment is provided, which can prevent signal pressure exceeding a predetermined pressure from being formed in a pilot signal path provided in a switching valve to...
US20110258996 SYSTEM AND METHODS FOR OPTIMIZING EFFICIENCY OF A HYDRAULICALLY ACTUATED SYSTEM  
Systems and methods for efficiently operating a hydraulically actuated device/system are described herein. For example, systems and methods for efficiently operating a gas compression and...
US20170175782 Construction Machinery  
The Construction machinery includes at least two actuators, a main pump that generates hydraulic energy for driving the actuators, control valves disposed between the main pump and the actuators,...
US20160160883 HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE  
A hydraulic circuit for a construction machine is disclosed, which can prevent a loss of pressure during a combined work. The hydraulic circuit includes a variable displacement hydraulic pump, at...
US20160115974 HYDRAULIC DRIVE SYSTEM FOR CONSTRUCTION MACHINE  
To cope with a variety of flow rate balance required of two actuators flexibly in combined operations driving two actuators of high maximum demanded flow rates at the same time while suppressing...
US20160084278 HYDRAULIC DRIVE WITH RAPID STROKE AND LOAD STROKE  
A hydraulic drive including a first differential cylinder that includes a first and a second pressure chamber and a first piston that separates the first from the second pressure chamber and...
US20150377258 Hydraulic Drive System for Construction Machine  
In addition to a main pump 102 having two delivery ports 102a and 102b and performing the load sensing control, two subsidiary pumps 202 and 302 for the load sensing control for respectively...
US20150368879 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...
US20150354603 HYBRID CONSTRUCTION MACHINE  
This invention provides a hybrid construction machine including a swing structure, a hydraulic pump, a hydraulic swing motor driving the swing structure using hydraulic fluid from the hydraulic...
US20150345518 DEVICE FOR VARYING THE VOLUMES OF A FIRST HYDRAULIC MACHINE AND A SECOND HYDRAULIC MACHINE  
A device for varying the swept volumes of first and second hydraulic machines, whose swept volumes depends upon pivoting positions of adjustable axes thereof which can be connected to one another...
US20150330059 LIQUID-PRESSURE DRIVE SYSTEM AND CONSTRUCTION MACHINE INCLUDING SAME  
In a hydraulic drive system, hydraulic oil discharged from an actuator pump is supplied to an actuator via an actuator drive circuit. In the hydraulic drive system, the hydraulic oil discharged...
US20150315768 CONSTRUCTION MACHINE WITH FLOATING FUNCTION  
Disclosed is a construction machine with a floating function for performing soil preparation or the like for flattening the ground or the like using a dozer blade. The construction machine with a...
US20150275939 HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE  
A hydraulic circuit changeable between a state of executing a regeneration action and a state of stopping the regeneration action. The hydraulic circuit includes hydraulic pumps; a plurality of...

Matches 1 - 47 out of 47