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Patent Searching and Data


Matches 501 - 550 out of 33,109

Document Document Title
WO/2014/066627A1
A hydraulic vale controller that uses an existing pressure differential as some or all of the power source for valve operation. In a high pressure environment, such as downhole in an oil or gas well, the pressure differential between the...  
WO/2014/062142A1
The present invention relates to a system preventing the pressured oil leakage in a cylinder line enabling very low leakage rates without using the valve or the system, or without reducing the diametrical space between the housing and sp...  
WO/2014/061741A1
A work machine comprises a variable-capacity pump (2), an actuator (5) driven by oil discharged by the pump (2), an open-center actuator flow rate control valve (4) for controlling the rate at which hydraulic oil flows to the actuator (5...  
WO/2014/061472A1
The pump discharge flow rate of a bidirectional piston pump (31) is set to a reference pump discharge flow rate Qa if the operation state of a lifting/lowering cylinder (15) is in a no-load state, and is set to a small-flow-rate pump dis...  
WO/2014/061776A1
The purpose of the present invention is to provide a steering gear capable of transmitting the needed power to a rudder shaft, and a ship provided with said steering gear. This steering gear (100) rotates a rudder shaft (1) linked to the...  
WO/2014/061125A1
An electromagnetic switching valve (19), for which the maximum opening is set to be small, is disposed on piping (K1) between a lift cylinder (10) and a hydraulic pump motor (11). A pilot check valve (20), for which the maximum opening i...  
WO/2014/061499A1
An air cylinder device having a cylinder body and a piston rod which is moved in the forward and backward directions by the supply and discharge of pressurized air into and from the cylinder body, wherein the air cylinder device is provi...  
WO/2014/061507A1
In order to prevent the closing of a pressure compensation valve on a lower load-pressure side and thus to prevent a reduction in speed or stopping of the actuator on the lower load-pressure side when saturation occurs in a combined oper...  
WO/2014/061407A1
A hydraulic oil flow path has a first flow path and a second flow path. The first flow path connects a first pump port and a first chamber of a hydraulic cylinder. The second flow path connects a second pump port and a second chamber of ...  
WO/2014/056592A1
The invention relates to a valve block (10) comprising a plurality of main sliders (40), which are supplied in parallel with pressure fluid via a first and a second pump conduit (80; 81), the fluid stream, which flows in from the respect...  
WO/2014/057746A1
A cylinder drive device provided with: a first passage for communicating a first chamber of a cylinder and a first port of a pump; a second passage for communicating a tank with a second chamber of the cylinder; a third passage for commu...  
WO/2014/054983A1
A lift arrangement (2) for a working machine (1), comprising: a tool linkage comprising an arm (5) in one end pivotably connectable to a working machine and in an opposite end pivotably connectable to a tool (3); a first hydraulic actuat...  
WO/2014/055008A1
The invention relates to an operating cylinder (10) for a gearbox (4), comprising a cylinder housing (14) which is provided with first and second endwalls (16, 18) to form a space (20); a piston (22) which is provided with a piston rod (...  
WO/2014/054326A1
A hydraulic circuit for a construction machine controls the operation of hydraulic actuators. The hydraulic circuit is provided with: a detection means which detects the first drive pressure of pressurized oil supplied to one hydraulic a...  
WO/2014/053662A1
An energy storage system is described comprising a closed gas circuit which comprises an expansion chamber 2, a compression chamber 3 coupled to the expansion chamber, a compressor for compressing gas from the expansion chamber as it is ...  
WO/2014/052560A1
A plunger-style actuator assembly for use in a detent mechanism includes a guide post and an external plunger sleeve supported for sliding movement over the guide post. The external plunger sleeve rides along bearing surfaces that longit...  
WO/2014/051472A1
A hydraulic system for a work machine, comprising a first and a second hydraulic actuator: a first and a second hydraulic machine for providing hydraulic fluid to at least one of the first and the second actuator via a first and a second...  
WO/2014/045626A1
The manifold electromagnetic valve (10) comprises base assemblies (12a-12c), each of which is obtained from multiple base modules (11). Intermediate blocks (13, 14) abut the two sides of the base assembly (12a). On the valve-loading surf...  
WO/2014/045672A1
Provided is a drive device that is for a working machine, is provided by a hydraulic closed circuit system that drives a cylinder by means of a hydraulic pump, and causes the movement speed in both the extending and contracting direction...  
WO/2014/042182A1
This mixing drum drive apparatus is provided with: a hydraulic motor that rotatably drives a mixing drum; a hydraulic pump that is driven by the engine of a mixing truck, and supplies hydraulic fluid to the hydraulic motor; an auxiliary ...  
WO/2014/041710A1
A drift-prevention valve device provided, so as to be capable of reducing pressure loss even when the flow amount of oil is low, with: a main channel for connecting a pump port and an actuator port; a poppet for opening and closing the m...  
WO/2014/037090A1
The invention relates to a fluidic actuator comprising a drive element (2) that can be supplied with a pressure fluid and a two-stage proportional position controller (3) controlling the supply with pressure fluid to the drive element, s...  
WO/2014/037089A1
The invention relates to a controlled three-way proportional valve unit comprising: a valve assembly with two individual valves; an actuating device actuating the individual valves of the valve assembly; and a control unit (21) acting up...  
WO/2014/033496A1
In this invention, check valves (11), opportunely modified with position transducers(12), are used to sense the flow rate supplied to each consumer. An electronic control device (16) sets the inlet pressure and the opening of the spool i...  
WO/2014/034510A1
An actuator is provided with: a cylinder; a piston which is inserted into the cylinder in a slideable manner; a rod which is inserted into the cylinder and connected to the piston; a rod-side chamber and a piston-side chamber, which are ...  
WO/2014/026934A1
The present invention provides a four-state fluid cylinder (150) which may be operated by using only two direct solenoids. A special field of application of the presented four- state cylinder (150) may be automotive gearboxes with four r...  
WO/2014/027576A1
This actuator is provided with: an expansion/contraction body; a tank; a first opening/closing valve provided to a first passage connecting a rod-side chamber and a piston-side chamber; a second opening/closing valve provided to a second...  
WO/2014/027585A1
This actuator is provided with: a cylinder; a piston inserted into the cylinder so as to be capable of sliding freely; a rod which is inserted into the cylinder, and which is connected to the piston; a rod-side chamber and a piston-side ...  
WO/2014/027621A1
A switching valve for switching between the supply and discharge of operating fluid to and from a cylinder is provided with: a spool mounted in the valve body in a slidable manner; one cylinder port connecting to a piston-side chamber; t...  
WO/2014/024521A1
The circuit has: a directional control valve group including a plurality of directional control valves arranged in tandem on a center bypass passage; and a bleed-off valve arranged on the center bypass passage downstream from the directi...  
WO/2014/024129A2
A supply device of a fluid substance (200) comprises a pneumatic cylinder (211) and a movable dividing wall ( 215 ) located in the pneumatic cylinder (211), which is arranged to separate hermetically the pneumatic cylinder (211) in a fir...  
WO/2014/024129A3
A supply device of a fluid substance (200) comprises a pneumatic cylinder (211) and a movable dividing wall ( 215 ) located in the pneumatic cylinder (211), which is arranged to separate hermetically the pneumatic cylinder (211) in a fir...  
WO/2014/021015A1
A hydraulic drive device performs load sensing control using a pump device, which has two discharge ports and the discharge flow rate of which is controlled by a single pump control device. The hydraulic control device is configured so t...  
WO/2014/017685A1
Disclosed is a hydraulic system capable of reducing the discharge flow rate of a hydraulic pump during the operation of a relief valve in the hydraulic system having the relief valve. The hydraulic system for a construction machine accor...  
WO/2014/017401A1
A steering device for a ship is provided with: first and second electric motors; first and second liquid pumps which are configured to be connected to and driven by the first and second electric motors, respectively, and which are each p...  
WO/2014/017475A1
[Problem] To provide a hydraulic drive circuit that, in a hydraulic drive system widely used in construction machines, industrial apparatuses such as presses, and the like, can achieve high responsiveness, high precision, and high effici...  
WO/2014/013852A1
A hydraulic cylinder (14) lowers a working machine as a consequence of operation oil being discharged from a first chamber (14c) and the operation oil being supplied to a second chamber (14d). An operation oil flow path (15) has a first ...  
WO/2014/010222A1
This tilt angle control device (1) has pressure sensors (51-56), and the pressure sensors (51-56) output to a control unit (60) a pressure command signal that is in accordance with the amount of operation. The control unit (60) outputs a...  
WO/2014/006950A1
A hydraulic circuit for a construction machine is provided with center bypass passages, to which pressurized oil discharged from hydraulic pumps is individually supplied. The hydraulic circuit for a construction machine is provided with:...  
WO/2014/001043A1
A hydraulic drive having a brake valve is disclosed, wherein the pressure acting on the brake valve in the opening direction is limited via a pressure-limiting valve. The latter can be set, for example, in dependence on the rotational sp...  
WO/2014/000858A1
In a machine press with a lower and an upper tool support, a closed hydraulic drive system acts upon the upper tool support. This system has at least one hydraulic drive unit (1), which for its part comprises at least one hydraulic cylin...  
WO/2014/005060A8
A power transfer unit includes a differential gear set (120), first and second pump/motors (220, 240), an electric motor/generator (260), and first and second hydraulic circuits (320,340). The differential gear set (120) includes a first...  
WO/2014/004243A1
The present disclosure relates to isolation and reconfiguration schemes, architectures and methods for use in aircraft hydraulic systems (100). The main hydraulic system (104) of each hydraulic section (102a, 102b) of the aircraft hydrau...  
WO/2014/000386A1
Disclosed is a control method for a hydraulic system. The hydraulic system comprises a variable delivery pump (1) and a plurality of actuating mechanisms (2) driven by the variable delivery pump (1), wherein each of said plurality of act...  
WO/2014/000378A1
A concrete pumping device, and a travel control apparatus and method for a series oil cylinder. The travel control apparatus for a series oil cylinder comprises: a first position detection unit (30) mounted on a first oil cylinder (10) a...  
WO/2014/005060A1
A power transfer unit includes a differential gear set (120), first and second pump/motors (220,240), an electric motor/generator (260), and first and second hydraulic circuits (320,340). The differential gear set includes a first input/...  
WO/2013/189566A1
The invention relates to a hydraulic adjusting device, in particular for use in a power plant, in particular a wind power plant, which has an adjusting function for a working operation and for a special operation. To this end, a double-a...  
WO/2013/190726A1
A work machine, comprising a load sensing system to control the discharge pressure of a hydraulic pump (P1) so that the differential pressure, which is obtained by subtracting the maximum load pressure of a plurality of hydraulic actuato...  
WO/2013/187092A1
A construction-machinery hydraulic circuit having a directional-control-valve group comprising a plurality of directional control valves positioned in tandem in a center bypass channel of the construction machinery, a bleed-off valve pos...  
WO/2013/187091A1
A construction-machinery hydraulic circuit having a directional-control-valve group comprising a plurality of directional control valves positioned in tandem in a center bypass channel of the construction machinery, and a bleed-off valve...  

Matches 501 - 550 out of 33,109