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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),...
US20140260235 EMERGENCY CYLINDER LOWERING CIRCUIT WITH REGENERATIVE HYDRAULICS AND BURST PROTECTION  
A safety system for bypassing counter balance valves of a catwalk hydraulic cylinder from a remote location in a safe and controlled manner. Oil from a base end of the hydraulic cylinder is routed...
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...
US20150059330 FLUID DELIVERY SYSTEM  
A fluid delivery system includes a first hydraulic circuit, and a second hydraulic circuit. The first hydraulic circuit includes a first hydraulic pump, and a first hydraulic motor. The first...
US20140345268 TRAVEL CONTROL SYSTEM FOR CONSTRUCTION MACHINERY  
A travel control system is disclosed for preventing off-course travel of equipment due to the overloading of a working piece such as a boom during a complex operation involving vehicle travel and...
US20080134674 Hydrostatic Drive with Rotational Speed Limitation  
The invention related to a hydrostatic drive comprising a hydraulic pump (3) which is driven by a drive machine (2) and pumps into at least one first working line(4), and a pressure line (18) in...
US20080190103 Hydrostatic Drive and Method of Braking a Hydrostatic Drive  
The invention relates to a hydrostatic drive (1) and to a method of braking a hydrostatic drive (1). In the hydrostatic drive (1), in a closed circuit a hydraulic pump (3) is connected by a first...
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...
US20080120974 INTEGRATED HYDROSTATIC TRANSMISSION FOR LEFT AND RIGHT WHEEL DRIVE  
A hydrostatic transmission mountable to a frame of a vehicle for driving a left side or right side drive wheel. A motor portion of the transmission can extend outwardly from the frame and a pump...
US20140360174 BOOM CYLINDER CONTROL CIRCUIT FOR CONSTRUCTION MACHINE  
The present disclosure relates to a boom cylinder control circuit for a construction machine, and includes: a boom cylinder which has an ascending-side chamber and a descending-side chamber; a...
US20150135697 DRIVING DEVICE FOR WORK MACHINE AND WORK MACHINE EQUIPPED THEREWITH  
There is provided a driving device for a work machine, having a closed hydraulic circuit system for driving cylinders with hydraulic pumps, the driving device making the speed of operation...
US20140137545 HYDRAULIC SYSTEM FOR PROVIDING AUXILIARY DRIVE TO A POWERTRAIN AND A HYDRAULIC CIRCUIT  
This disclosure is directed towards a hydraulic system for providing auxiliary drive to a powertrain (11) and a hydraulic circuit (12) by storing and releasing hydraulic fluid using an accumulator...
US20150082784 FLUSHING CIRCUIT FOR HYDRAULIC CYLINDER DRIVE CIRCUIT  
The present invention provides a flushing circuit for a hydraulic cylinder drive circuit, by which the flushing of the circuit is conducted while protecting precision apparatuses of a control...
US20080053083 Device for Use in a Vehicle  
A vehicle (1) utilizes a hydrostatic transmission arrangement (10, 11, 12, 13). This transmits drive force (F) from at least one first wheel (2) to at least one second wheel (3). The arrangement...
US20140174067 RAMPING SUBSYSTEM FOR A MACHINE WITH A DUAL PATH ELECTRONICALLY CONTROLLED HYDROSTATIC TRANSMISSION  
A ramping subsystem of a control system for a dual path electronically controlled hydrostatic transmission is used to modify the commanded rate of change of pump and motor acceleration,...
US20150075154 HYDRAULIC PRESSURE SUPPLY SYSTEM OF AUTOMATIC TRANSMISSION  
A hydraulic pressure supply system supplies hydraulic pressure generated at a hydraulic pump provided with first and second pump chambers formed therein to a high pressure portion and a low...
US20150075152 HYDRAULIC PRESSURE SUPPLY SYSTEM OF AUTOMATIC TRANSMISSION  
A hydraulic pressure supply system supplies hydraulic pressure generated at a hydraulic pump provided with first and second pump chambers formed therein to a high pressure portion and a low...
US20150075151 HYDRAULIC PRESSURE SUPPLY SYSTEM OF AUTOMATIC TRANSMISSION  
A hydraulic pressure supply system supplies hydraulic pressure generated at a hydraulic pump provided with first and second pump chambers formed therein to a high pressure portion and a low...
US20120060487 WORKING MACHINE  
In the working machine, first and second pilot flow paths are directly or indirectly connected to to a tank flow path (52). A first restrictor is disposed between the first pilot flow path and the...
US20150040555 HYDRAULIC DRIVE  
In a hydraulic drive of a tool, a piston is adapted to be acted upon by a pump via a pressure limiting seat valve and a parallel switching seat valve of a valve arrangement. A restriction is...
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...
US20060026955 Pressure-medium-actuated actuation device, in particular for a vehicle steering apparatus  
A pressure-medium-actuated actuation device, in particular for a vehicle steering apparatus, comprises a double-acting actuator (12) with two active regions (24, 26) acting essentially in...
US20080257142 Hydraulic Pressure Control Apparatus and Hydraulic Circuit  
A supply passage 32, a discharge passage 33, an actuator passage 34, and a spool bore 36 are defined in a housing 31. The spool bore 36 accommodates a spool 35 and communicates with the supply...
US20150068200 HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE AND CONTROL DEVICE FOR SAME  
A hydraulic circuit for a construction machine including a center bypass passage including a group of directional control valves arranged in tandem; and a bleed-off valve arranged in the center...
US20140033698 METERLESS HYDRAULIC SYSTEM HAVING FORCE MODULATION  
A hydraulic system is disclosed. The hydraulic system may have a pump configured to draw low-pressure fluid from one of a first and a second passage, and discharge fluid at an elevated pressure...
US20080016862 Hydraulic Switching Arrangement, Particularly for the Drive of Concrete Spreader Masts  
The invention relates to a hydraulic circuit arrangement, in particular for the drive of concrete distributor masts. The circuit arrangement comprises at least one hydraulic load (34, 35, . . . ),...
US20080104955 Bidirectional hydraulic transformer  
A hydraulic transformer is disclosed. The hydraulic transformer may have a housing, and a first pumping mechanism disposed within the housing and rotated in a first direction by fluid pressure....
US20150135701 FLUID PUMP FOR A LINEAR ACTUATOR  
A fluid pump for a linear actuator is provided. The pump causes a rod in the actuator to extend or retract by controlling the flow of fluid to and from portions of a fluid chamber on either side...
US20150075153 HYDRAULIC PRESSURE SUPPLY SYSTEM OF AUTOMATIC TRANSMISSION  
A hydraulic pressure supply system supplies hydraulic pressure generated at a hydraulic pump having two pump chambers to a low pressure portion and a high pressure portion and performs mode...
US20110277459 Hydrostatic Drive  
A hydrostatic drive, in particular a fan drive, with a variable displacement pump is configured to drive at least one hydraulic motor. The variable displacement pump is activated via a pressure...
US20140325971 Hydromechanical Power Management of Fixed Displacement Boost Pumps  
A hydraulic apparatus and a method of controlling the hydraulic apparatus are disclosed. The hydraulic apparatus includes a first pump having a first fixed displacement, a second pump having a...
US20130047599 METERLESS HYDRAULIC SYSTEM HAVING LOAD-HOLDING BYPASS  
A hydraulic system is disclosed. The hydraulic system may have a pump, a hydraulic actuator, and first and second passages fluidly connecting the pump to the hydraulic actuator in a closed-loop....
US20100170240 HYDRAULIC RESERVOIR PRESSURE RELIEF MECHANISM  
An exemplary hydraulic reservoir includes a reservoir tank having an interior cavity for retaining a fluid and an aperture fluidly connecting the interior cavity to an exterior region of the...
US20140373519 ELECTRO-HYDRAULIC SYSTEM WITH FLOAT FUNCTION  
A method of controlling a float function of a cylinder 25 having a first side and a second side includes connecting the second side of the cylinder to a reservoir 15; connecting the first side of...
US20140331664 SLEWING TYPE WORKING MACHINE  
Provided is a slewing-type working machine capable of reducing back pressure generated during slewing. The slewing-type working machine includes: a base carrier; an upper slewing body; a hydraulic...
US20150059331 HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE AND CONTROL DEVICE THEREFOR  
A hydraulic circuit for a construction machine including a direction control valve group including direction control valves provided in tandem to a center bypass passage, a bleed-off valve...
US20100122528 Hydraulic system having regeneration and supplemental flow  
A hydraulic system for a machine is disclosed. The hydraulic system may have a pump, a tank, a first actuator with a head-end and a rod-end, and a first valve arrangement configured to control...
US20110088385 Fluid pressure actuator unit  
A fluid pressure cylinder (3) is connected to a discharge port (24) of a fluid pressure pump (2). A suction port (25) of the fluid pressure pump (2) is connected to a tank (10) via a suction...
US20140366521 HYDRAULIC DRIVE SYSTEM  
A hydraulic drive system includes a pump, a steering actuator, a loading/unloading apparatus actuator, a drive device, a relief valve, and an input unit. The drive device: flows hydraulic oil from...
US20140174066 CONTROL SYSTEM FOR A MACHINE WITH A DUAL PATH ELECTRONICALLY CONTROLLED HYDROSTATIC TRANSMISSION  
A control system for a machine with a dual path electronically controlled hydrostatic transmission is used to achieve a desired performance and a desired operator feel while performing all of the...
US20140366520 Fluid Controller with Load Sense and Flow Amplification  
A fluid controller includes a valve housing having an inlet port, a return port, first and second control ports and a load sense port. The fluid controller further includes a fluid meter in...
US20140345267 FLUID VALVE ARRANGEMENT COMPRISING A BISTABLE FLUID VALVE  
The invention relates to a fluid valve arrangement having a bistable fluid valve for at least one fluid line with a valve body which can be moved into two positions for two switching states, a...
US20110302915 HYDRAULIC PRESSURE CONTROL DEVICE  
A hydraulic pressure control device including a valve for generating a circulating pressure to a hydraulic power transmission chamber in which power is transmitted between an input- and output...
US20070175210 Control and adjustment system for a lifting and tilting mechanism of a working tool in a mobile machine  
The invention relates to a control and adjustment system for a lifting mechanism (100) of a loading blade (6) in a mobile machine tool. Said lifting mechanism is made up of at least one first and...
US20090282825 Actuator Control Device  
In an actuator control device that controls an expansion/contraction operation of a hydraulic cylinder, when a main spool 52 is switched to a discharge position for discharging working fluid in...
US20130145926 ELECTROHYDRAULIC CONTROL DEVICE  
An electrohydraulic control device and a method for actuating such an electrohydraulic control device include a hydraulic consumer having an actuator element and a pressure medium source that is...
US20120324874 INDEPENDENT SUPPLY AND EXHAUST METERING WITHIN A VALVE CASTING  
The present disclosure provides a hydraulic system for controlling a load. The system includes a housing defining an inlet, a first port, and a second port. The system further includes a spool...
US20170023032 LOOP-FLUSHING-SYSTEM FOR HYDROSTATIC APPARATUS  
A hydraulic loop-flushing device (50) for a hydrostatic apparatus (1) comprising a valve housing (8) having a cylindrical valve bore (9) with a high pressure inlet (5 or 6), a low pressure inlet...
US20150376870 Hydraulic Apparatus Based on Confluence Control Mode  
A hydraulic apparatus based on a confluence control mode includes a load sensing unit provided with first and second reversing valves, and a throttle governing unit provided with a fourth...
US20150330414 VELOCITY CONTROL FOR HYDRAULIC CONTROL 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. The capacity of one of the machines...

Matches 1 - 50 out of 51 1 2 >