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Matches 151 - 200 out of 3,126

Document Document Title
WO/2013/106690A1
Examples of automatic valve shutoff systems are described which may include an actuation device including an actuator and a valve attachment portion. The valve attachment portion may be configured for attachment with an existing valve in...  
WO/2013/103166A1
The present invention relates to a cylinder cushion device for a construction machine, in which damping pressure is released through a flow path inside a cushion plunger to reduce shock due to flow path throttling and the impact of abnor...  
WO/2012/082018A8
The invention relates to a hydraulic device (1) comprising a cylinder (2) and a piston (3) wherein the piston (3) is arranged to be able to move back and forth in the cylinder (2). The piston (3) comprises a piston rod (4) and a piston d...  
WO/2013/100509A1
The present invention relates to a pressure overshooting prevention system for an electronic hydraulic pump in a hydraulic system. A flow command is added (+) and a discharge flow rate is subtracted (-) to calculate a displacement flow r...  
WO/2013/098800A1
A valve positioner system (12) with zero bleed at steady state is disclosed. The system has a pilot valve (30), the operation of which is controlled by an electronic circuit (34) powered from a signaling and power connection of a positio...  
WO/2013/069374A1
A closed hydraulic circuit system (100) capable of driving a hydraulic cylinder (3) having a first port (3b) and a second port (3c) comprises: a hydraulic pump (1) which has a first pump port (1a) hydraulically connected to the first por...  
WO/2013/059773A1
A fluid flow control device includes a trim cartridge, a diaphragm assembly, and a control element. The trim cartridge defines a cartridge supply port and an upper planar surface. The cartridge supply port is disposed along a supply path...  
WO/2013/046630A1
A hydraulic pressure unit (10) is provided with a power module (53) for generating heat when electrified. This power module (53) is positioned on the bottom surface of a recess (35) in contact with hydraulic fluid in a tank (30). Therefo...  
WO/2013/035425A1
This construction machine is provided with: an engine (10) electronically controlled by a control apparatus (33); a hydraulic motor (24) for travelling which is driven by pressure oil discharged from a hydraulic pump (13); and a travel s...  
WO/2013/008964A1
Disclosed is an actuator damping control system for reducing shocks imparted to a hydraulic actuator caused by a change in load resulting from an abrupt manipulation of a boom or other working device. The hydraulic actuator damping contr...  
WO/2012/118564A3
The present disclosure relates to fault detection, isolation and reconfiguration schemes, architectures and methods for use in electrohydraulic actuation systems for construction equipment. In one embodiment, a supervisory controller ada...  
WO/2012/157510A1
This invention comprises: a rotary hydraulic motor (23) and a rotary electric motor (101) for driving an upper rotary body (2), which is the common object to be driven; a hydraulic pump (22) for supplying a pressurized oil to the rotary ...  
WO/2012/153880A1
The present invention relates to a hybrid excavator on which is mounted a hybrid actuator for quickly stopping a working device being operated at high speed during work such as pipe laying. The hybrid excavator on which the hybrid actuat...  
WO/2012/150753A1
An air lifting system with a piston locking means capable of locking the piston firmly at the position where the piston reached is disclosed. The air lifting system includes a piston locking means which can fix the piston, which is eleva...  
WO/2012/144665A1
Disclosed is a hydraulic circuit for controlling booms of construction equipment, wherein working oil which is relieved from a large chamber of a boom cylinder passes through an orifice so as to prevent the boom from lowering if an overl...  
WO/2012/128132A1
Hybrid construction machinery is provided with: a control device (80) that switches between hydraulic/electric complex rotation mode which drives the rotating body (20) with the total of the torque of the hydraulic motor (27) and an elec...  
WO/2012/128291A1
A mixer drum driving device provided with a mixer drum, a hydraulic motor, a hydraulic pump, an auxiliary hydraulic pump that supplies hydraulic oil to the hydraulic motor independently from the hydraulic pump to cause the mixing rotatio...  
WO/2012/087012A3
The present invention relates to a hydraulic system for a construction machine which uses an electric hydraulic pump, and more particularly, to a hydraulic system including an emergency control unit for temporarily operating the construc...  
WO/2012/118551A1
Methods and apparatus for bypassing a positioner in an active control loop are described. An example actuator assembly includes a pneumatic actuator (106) and a transfer station (104). The transfer station includes a body defining flow p...  
WO/2011/127153A4
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 varie...  
WO/2012/109558A1
A method of controlling a hydraulic circuit having a pump, a hydraulic actuator, and a control valve disposed between the pump and hydraulic actuator is disclosed. The method includes selectively placing the hydraulic circuit between a w...  
WO/2012/104046A1
The invention relates to a hydraulic actuating assembly for valves for controlling process fluid flows, comprising a valve that is operated by an actuator and that is pre-tensioned in the direction of a closing position. The actuator has...  
WO/2012/087012A2
The present invention relates to a hydraulic system for a construction machine which uses an electric hydraulic pump, and more particularly, to a hydraulic system including an emergency control unit for temporarily operating the construc...  
WO/2012/081197A1
Provided is an apparatus for controlling an elastic actuator drive mechanism, which determines abnormality of an output measuring means (8) by being provided with an abnormality determining means (49), which determines whether an output ...  
WO/2012/082018A1
The invention relates to a hydraulic device (1) comprising a cylinder (2) and a piston (3) wherein the piston (3) is arranged to be able to move back and forth in the cylinder (2). The piston (3) comprises a piston rod (4) and a piston d...  
WO/2012/076178A1
Disclosed is a fail-safe fluidic actuation system (1) having a safety position, comprising a control element (2) having at least one first and one second chamber (3, 4); having a working circuit (5) with a motor/pump device (6), wherein ...  
WO/2012/070392A1
A hydraulic cylinder system (1) comprises: cylinders (3a, 3b); valves (4a, 4b) respectively provided to the cylinders (3a, 3b) and adjusting the amount of operating liquid supplied into and discharged from the cylinders (3a, 3b); drive s...  
WO/2012/067276A1
Disclosed is a hydraulic cylinder with a variable cushion orifice, wherein the size of an orifice hole, which is provided for cushioning so as to reduce a shock generated at a stroke end of a cylinder rod, may be simply controlled from t...  
WO/2011/141086A3
The invention relates to a hydraulic valve for exposing the supply pressure line of a hydraulic load supplied by a normal pressure source to a substitute pressure source. The invention should further develop the hydraulic valve so that t...  
WO/2012/062404A1
The invention relates to two variants of a safety circuit for valves actuated hydraulically via a positioning cylinder. In the first variant, the positioning cylinder (2, 202) can be hydraulically or pneumatically depressurized in an eme...  
WO/2012/053534A1
Provided is a work vehicle that enables malfunction of a hydraulic actuator and malfunction of the operating lever device to be prevented. In a backhoe (1), a control unit (84e) is configured so as to display a switching position (P) in ...  
WO/2012/046677A1
Provided is a hybrid construction machine capable of promptly stopping a revolving body by means of the stopping control of a normal construction machine even when, for some reason, the revolving body moves contrary to the expectation of...  
WO/2012/007739A3
An adjustable pilot - actuated valve (230) is provided. The adjustable pilot - actuated valve (230) comprises a housing (331) forming a valve chamber (332), a first piston chamber (338), and a second piston chamber (340). The adjustable ...  
WO/2012/030003A1
Disclosed is a hydraulic circuit that supplements and uses a hydraulic fluid of a hydraulic pump for a cooling fan and a hydraulic fluid of a main hydraulic pump as a hydraulic power unit of RCV to supply a signal pressure to a control v...  
WO/2011/127153A3
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 varie...  
WO/2012/023229A1
A device is provided to detect clogging of a filter (6) provided onto a construction machinery. This device can maintain a high detection accuracy under normal temperatures while ensuring the required frequency of detection even when col...  
WO/2011/145585A1
Provided is a hybrid construction machine such that an electric motor is used to drive a swing body, and that even if, for some reason, there arises a situation where the torque of the motor cannot be generated, satisfactory work can be ...  
WO/2011/142447A1
The disclosed rotating parking brake control device obviates the need for an operator to operate an emergency-stop switch. A hybrid controller, to which a brake is connected, drives/controls an upper rotating body by outputting a drive/c...  
WO/2011/112209A1
A double valve (110) includes a first unitary valve (111) assembly and a second unitary valve assembly (112). Each unitary valve assembly includes a first outlet port (188a, 189b), a second outlet port (189a, 188b), and a spool (180, 181...  
WO/2010/149446A3
The invention relates to a control circuit for a pneumatic or hydraulic actuator (1), particularly a pneumatic or hydraulic actuating cylinder of a vehicle transmission, comprising a plurality of valves (2, 3, 4, 5), wherein depending on...  
WO/2011/099214A1
Disclosed is a hydraulic excavator attachment control device comprising a hydraulic circuit that is provided with a hydraulic pump (3); a plurality of actuators including the actuator for a breaker (110) which is an attachment; and a plu...  
WO/2011/081722A1
Apparatus to increase a force of an actuator having an override apparatus are described herein. An example fluid control system includes a first fluid control apparatus to fluidly couple a control fluid supply source to a control actuato...  
WO/2011/019644A3
An actuator and counterbalance system including a nonmobile carrier; a mobile carrier, mobile relative to the non mobile carrier; and a counterbalance system in operable communication with the mobile carrier and configured to counterbala...  
WO/2011/050144A1
A method for controlling a safety feature for a hydraulic machine (10) is provided. The method includes detecting when at least control valve (48, 58, 60, 62) for a controller (36, 38, 40, 42) of an implement (12) for the hydraulic machi...  
WO/2011/037287A1
The present invention relates to a fail safety actuator. The fail safety actuator according to the present invention includes: a driver for supplying a driving force; a moving member for moving to a position or returning to an original p...  
WO/2011/032364A1
A safety control double valve for a power-off protection press includes a double valve(56,96,100), a safety valve(55), a pneumatic-electric signal converter(57) and a detection control driving circuit(9). The connection way of the ...  
WO/2011/018152A1
The invention relates to a control valve device (1), comprising two main valves (HV1, HV2), each of which can be actuated by a pilot valve (VV1, VV2) so that they can be switched into a working position in which they cause a pneumatic pr...  
WO/2011/019644A2
An actuator and counterbalance system including a nonmobile carrier; a mobile carrier, mobile relative to the non mobile carrier; and a counterbalance system in operable communication with the mobile carrier and configured to counterbala...  
WO/2011/003506A1
The invention relates to a controller for a secure electro-hydraulic axis (2) comprising a valve block (10), which has a first and a second working connection (Y2, Y1) for a hydraulic load (2) that has two supply connections (X1, X2) and...  
WO/2010/149446A2
The invention relates to a control circuit for a pneumatic or hydraulic actuator (1), particularly a pneumatic or hydraulic actuating cylinder of a vehicle transmission, comprising a plurality of valves (2, 3, 4, 5), wherein depending on...  

Matches 151 - 200 out of 3,126