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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 3249. Отображено 100.
09-01-2020 дата публикации

System and method for detecting position of a valve driven by a solenoid linear actuator

Номер: US20200011449A1
Автор: Aaron Hertzel Jagoda
Принадлежит: Eaton Intelligent Power Ltd

A valve assembly includes a valve moveable between an open position where hydraulic fluid flow is permitted and a closed position where hydraulic fluid flow is blocked. A controller includes a magnetometer adapted to measure a magnetic flux through at least a portion of a solenoid linear actuator that moves the valve. A magnetic flux value measured by the magnetometer corresponds to a linear position of the regulating member relative to the port.

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Номер записи: 1
17-01-2019 дата публикации

Servo governor by pwm

Номер: US20190017520A1
Автор: Shahin Fallahi
Принадлежит: Individual

A servo actuator is provided which may comprise a controller configured to control a plurality of solenoid valves based upon an output signal. The plurality of solenoid valves may be used to control the position of the object. For example, a set of solenoid valves, of the plurality of solenoid valves, may be configured to conduct fluid from a tank into a first chamber of the cylinder, conduct fluid from the tank into a second chamber of the cylinder, conduct fluid from the second chamber of the cylinder into a first solenoid valve and/or conduct fluid from the first chamber of the cylinder into the first solenoid valve. The first solenoid valve, of the plurality of solenoid valves, may be configured to conduct fluid from the set of solenoid valves into a vent valve based upon a pulse width modulation (PWM) signal received from the controller.

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Номер записи: 2
22-01-2015 дата публикации

VALVE ASSEMBLY HAVING DUAL FUNCTIONALITY FOR DIRECTIONAL CONTROL OF A PISTON ON A FLUID ACTUATED DEVICE

Номер: US20150020905A1
Автор: Strobel Lee Richard
Принадлежит: Dresser, Inc.

Embodiments of a directional valve assembly that provides a single device with functionality of a two-position design for automated operation and functionality of a three-position design for manual operation. The embodiments can include a housing with a piston chamber and a spool member that transits in the housing to regulate the flow of a working fluid to a cylinder. The embodiments can also have one or more pilot operators that regulate the flow of pilot air into the piston chamber to move the spool member between two positions, i.e., two open positions. The embodiments can also have a manual operator (e.g., a lever) that can move the spool to the open positions and to a closed position. In one embodiment, the spool member is configured to remain in either a first position, a second position, or a third position in the absence of an outside stimulus on the pilot operators. 1. A valve assembly , comprising:a housing with an inner chamber;a spool member disposed in the inner chamber, the spool member having a first position, a second position, and a third position disposed between the first position and the second position;a first operator configured to change the position of the spool element between the first position and the second position, the first operator comprising a first pilot operator and a second pilot operator, each having a first state and a second state; anda second operator configured to change the position of the spool element between the first position, the second position, and the third position,wherein the first pilot operator and the second pilot operator are configured to assume the first state in response to an electrical stimulus and to assume the second state in the absence of the electrical stimulus, andwherein the spool member is configured to remain in one of the first position, the second position, and the third position with the first pilot operator and the second pilot operator in the second state.2. The valve assembly of claim 1 , ...

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Номер записи: 3
29-01-2015 дата публикации

ELECTROMAGNETIC VALVE

Номер: US20150027573A1
Автор: KONDO Jiro, OCHIAI Masahiko
Принадлежит:

An oil control valve has a cup shaft and a plunger. The cup shaft and the plunger have a projection and a recess to provide a male-female joint. The male-female joint provides contact points which can reduce lateral offset and inclination. The projection and The recess provides two or more force transmitting points from the plunger to the cup shaft, when the projection and the recess are inclined with each other. The force transmitting points are located about the central axis of the spool in a distributed manner. 1. An electromagnetic valve comprising:a spool valve having a sleeve formed in a cylindrical shape extending along a central axis from a base end to a distal end, and a spool supported within a spool bore formed in the sleeve in a reciprocally movable manner;a shaft disposed axially next to the spool to come into contact with the base end of the spool; andan electromagnetic actuator having a stator core formed in a cylindrical shape and fixed on the base end of the sleeve, a cup guide formed in a bottomed cylindrical shape and disposed radial inside of the stator core, a movable core supported in a guide bore formed within the cup guide in a reciprocally movable manner and connected to the spool via the shaft in an integrally movable manner, and a coil excited by current to magnetize the movable core and the stator core, whereinthe shaft has a first stepped portion formed in a shape to provide a male-female joint, the first stepped portion being formed on a first end portion, which comes in contact with the movable core, and whereinthe movable core has a second stepped portion formed in a shape to provide the male-female joint with the first stepped portion, the second stepped portion being formed on a second end portion, which comes in contact with the shaft.2. The electromagnetic valve claimed in claim 1 , whereinone of the first stepped portion or the second stepped portion has a projection, and whereinthe other one of the first stepped portion or the ...

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Номер записи: 4
31-01-2019 дата публикации

SERVO-PNEUMATIC CONTROL SYSTEMS FOR SOFT ROBOTIC ACTUATORS

Номер: US20190030714A1
Автор: KNOPF Ryan, LESSING Joshua Aaron
Принадлежит:

Exemplary embodiments relate to the use of servo-pneumatic control systems for actuation and de-actuation of soft robotic actuators. Apparatuses and methods are disclosed for using a servo-pneumatic control system in fluid communication with the soft robotic actuator and configured to maintain a closed loop in which at least one of pressure, mass of fluid, or volume of fluid is controlled within the soft robotic actuator. The embodiments may be used to prevent deformation of grasped objects; detect grasping, collision, and releasing objects; and other operations with a rapid servo-pneumatic response. 1. An apparatus comprising:a soft robotic actuator; anda servo-pneumatic control system in fluid communication with the soft robotic actuator and configured to maintain a closed loop in which at least one of pressure, mass of fluid, or volume of fluid is controlled within the soft robotic actuator.2. The apparatus of claim 1 , wherein the servo-pneumatic control system comprises a servo-pneumatic valve supplied with positively pressurized inflation fluid claim 1 , the servo-pneumatic valve configured to direct the inflation fluid among at least one of a plurality of fluid flow paths in response to a control signal.3. The apparatus of claim 2 , wherein the valve is a 5/3 all ports blocked center spool valve.4. The apparatus of claim 2 , wherein the control signal is associated with a magnitude.5. The apparatus of claim 4 , wherein the magnitude is zero claim 4 , and in response to the control signal the valve is configured such that fluid is not exchanged into or out of an output of the control system.6. The apparatus of claim 4 , wherein the magnitude is a positive value claim 4 , and the valve is displaced proportional to the magnitude in a direction allowing positively pressurized inflation fluid to flow from an input of the control system toward an output of the control system.7. The apparatus of claim 4 , wherein the magnitude is a negative value claim 4 , and the ...

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Номер записи: 5
17-02-2022 дата публикации

Switching unit and pneumatic system

Номер: US20220049721A1
Автор: Matthew Oakley, Thomas Reitinger
Принадлежит: Berlin Heart GmbH

A switching unit may be provided for connecting a first pneumatic unit and a second pneumatic unit of a pneumatic system together. The switching unit comprises a main body having: a channel structure which extends through the main body; a first and a second inlet for introducing a pressure into the channel structure; a first and a second outlet for discharging at least some of the pressure from the channel structure; and a first and a second valve; wherein the first inlet can be brought into a pressure-exchange connection to the first outlet via a first channel by setting a first switch position of the first valve or to the second outlet via a second channel by setting a second switch position of the first valve, and wherein the second inlet can be brought into a pressure-exchange connection to the first outlet via a third channel by setting a first switch position of the second valve or to the second outlet via a fourth channel by setting a second switch position of the second valve.

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Номер записи: 6
31-01-2019 дата публикации

ELECTROMAGNETIC VALVE DEVICE, USE THEREOF, AND SYSTEM

Номер: US20190032799A1
Автор: Raff Viktor, Thode Oliver
Принадлежит: ETO MAGNETIC GMBH

An electromagnetic valve device having a fluid inlet port (), which is formed in a valve casing (), for a fluid to be switched, in particular pneumatic fluid, a working port (), which is realized in the valve casing, for the fluid and locking component(s) (), which are moveably guided in the valve casing along an axial direction and which are realized for interacting with a valve seat () formed in the valve casing and opening a fluid flow path between the fluid inlet port and the working port and which are moveably realized via fluid switched by means of electromagnetic positioning means (). 1110. An electromagnetic valve having a fluid inlet port () , which is formed in a valve casing () , for fluid to be switched ,{'b': '2', 'a working port (), which is formed in the valve casing, for the fluid,'}{'b': 14', '26', '32, 'and locking means (), which are movably guided in the valve casing along an axial direction and are formed for interacting with a valve seat () formed in the valve casing and opening a fluid flow path between the fluid inlet port and the working port and which are realized so as to be movable via a fluid switched by means of electromagnetic positioning means (),'}{'b': '36', 'an axially directed drive force of the drive means counteracting a return force acting on the locking means via spring means (),'}wherein{'b': '26', 'the valve seat () is formed axially bilaterally such that a first opening area is exposed in a first axial displacement position of the locking means relative to the valve casing and a second opening area, which is arranged opposite to the first opening area, is exposed in an opposing second axial displacement position,'}{'b': '50', 'figref': {'@idref': 'DRAWINGS', 'FIG. 1'}, 'and the module-like valve casing being used and received in a valve outer casing () having external ports, which align with the fluid inlet port as well as the working port, such that when the positioning means are not activated, the return force closes the ...

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Номер записи: 7
12-02-2015 дата публикации

Method and Control Device to Operate a Component of a Vehicle

Номер: US20150040549A1
Автор: Arnold Jorg, Schmidt Thilo, STEINHAUSER Klaus
Принадлежит:

Method for the operation of an assembly of a vehicle, whereas the assembly is transferable from an unactuated position into an actuated position by a pressure medium-actuated actuator, if two redundant pressure medium valves both occupy a pressure supply position, whereas, for the functional test of one of the redundant pressure medium valves, a first pressure medium valve is controlled in such a manner that the same occupies the pressure supply position, whereas a second pressure medium valve is controlled in such a manner that the same does not occupy the pressure supply position, and whereas if, upon this control of the two pressure medium valves at the pressure medium-actuated actuator or at the assembly to be operated by the pressure medium-actuated actuator, no reaction is detected, there is a closing at a proper second pressure medium valve, whereas if, despite this control of the two pressure medium valves at the pressure medium-actuated actuator or at the assembly to be operated by the pressure medium-actuated actuator, a reaction is detected, there is a closing at a defective second pressure medium valve. 1. Method for the operation of an assembly of a vehicle , whereas the assembly is transferable from an unactuated position into an actuated position by a pressure medium-actuated actuator , if two redundant pressure medium valves both occupy a pressure supply position , characterized in that , for the functional test of one of the redundant pressure medium valves , a first pressure medium valve is controlled in such a manner that the same occupies the pressure supply position , whereas a second pressure medium valve is controlled in such a manner that the same does not occupy the pressure supply position , and that if , upon this control of the two pressure medium valves at the pressure medium-actuated actuator or at the assembly to be operated by the pressure medium-actuated actuator , no reaction is detected , there is a closing at a proper second ...

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Номер записи: 8
07-02-2019 дата публикации

DEVICE FOR CONTROLLING THE OUTLET FLAP OF A BALER AND METHOD THEREOF

Номер: US20190037775A1
Автор: Humbert Clément, MERCIER JEAN-ALEXIS
Принадлежит:

A device for controlling an outlet flap of a baler in at least one manual and one automatic mode includes an outlet flap drive, a first and a second pressure line via which the outlet flap drive is selectively charged with pressure, a first pressure measuring means operatively connected to the first pressure line and, a second pressure measuring means operatively connected to the second pressure line. The first and second pressure measuring means determine a pressure in each respective pressure line. A distributor valve is connected to the first and second pressure lines downstream of the first and second pressure measuring means. The distributor valve is disposable in a first pass-through position, a second pass-through position, and a shut-off position. In an automatic mode, the distributor valve is disposed in a predetermined position dependent on a pressure difference between the pressures in the first and second pressure lines. 1. A device for controlling an outlet flap of a baler in at least one manual and one automatic mode , comprising:an outlet flap drive;a first and a second pressure line via which the outlet flap drive is selectively charged with pressure;a first pressure measuring means operatively connected to the first pressure line and a second pressure measuring means operatively connected to the second pressure line, the first and second pressure measuring means configured to determine a pressure in each respective pressure line; anda distributor valve connected to the first and second pressure lines downstream of the first and second pressure measuring means;wherein, the distributor valve comprises at least a first pass-through position, a second pass-through position, and a shut-off position;wherein, in the at least one automatic mode, the distributor valve is disposed in a predetermined position dependent on a pressure difference between the pressures in the first and second pressure lines.2. The device of claim 1 , wherein:in the first pass- ...

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Номер записи: 9
07-02-2019 дата публикации

FOUR-WAY CONTROL VALVE FOR PNEUMATIC CHARGING AND DISCHARGING OF WORKING VESSEL

Номер: US20190040878A1
Автор: Goldfarb Michael, Mell Dennis, Mell Ellen
Принадлежит: Nexmatic LLC

A control valve comprises a body. A diverter is disposed within the body. The diverter is movably positionable within the body such that the diverter can assume a first position, second position and third position. The body includes one or more exhaust ports, a supply port, a first outlet port and a second outlet port. The body and diverter are configured such that: when the diverter is in the first position, the supply port and first outlet port fluidly communicate and the one or snore exhaust ports and second outlet port are fluidly isolated; when the diverter is in the second position, the first outlet port and one of the one or more exhaust ports fluidly communicate and the supply port and second outlet port are fluidly isolated; and When the diverter is in the third position, the first outlet port and second outlet port fluidly communicate and the supply port and the one or more exhaust ports are fluidly isolated. 1. A valve for controlling the flow of a fluid , the valve comprising:a valve body and a flow diverter disposed within the valve body and movably positionable within the valve body such that the flow diverter can assume a first position, a second position and a third position;the valve body comprising a plurality of external ports, the plurality of external ports comprising a supply port, a first outlet port, and a second outlet port and one or more exhaust ports; a) when the flow diverter is in the first position, the supply port and the first outlet port are in fluid communication with each other and the one or more exhaust ports and second outlet port are in fluid isolation;', 'b) when the flow diverter is in the second position, the first outlet port and one of the one or more exhaust ports are in fluid communication with each other and the supply port and the second outlet port are in fluid isolation; and', 'c) when the flow diverter is in the third position, the first outlet port and the second outlet port are in fluid communication with each ...

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Номер записи: 10
07-02-2019 дата публикации

ELECTROPNEUMATIC VALVE ASSEMBLY

Номер: US20190040882A1
Автор: BILRA Manjeet, HALLER Daniel, HILDEBRANDT Benedikt, KIRN Michael, MOLNAR Györg, NEISS Sebastian, Schaible Jochen, SCHROBENHAUSER Max
Принадлежит:

An electropneumatic valve assembly comprises an electropneumatic pilot stage and a pneumatic power stage which is actuated by the pilot stage. Each pilot valve switches at least two power valves, and the valve assembly has a housing with an electrical signal input, with a compressed-air port, at least one vent port and at least one working outlet. The housing is layered with a pilot stage housing and a power stage housing connected along a substantially planar parting surface. At least one sealing element is between the pilot stage housing and power stage housing surrounding a control pressure region between the pilot stage housing and power stage housing. The control pressure region has two actuation regions for two power valves and has a duct-like connection with a defined flow cross section between the two actuation regions. An outlet of the associated pilot valve opens into the control pressure region. 1142. An electropneumatic valve group () , especially for actuation of a pneumatic working element () , comprising:{'b': 1', '2, 'an electropneumatic pilot stage with at least one pilot valve (P, P) and'}{'b': 1', '1', '2', '2, 'i': a', 'b', 'a', 'b, 'a pneumatic power stage, activated by the pilot stage, with at least two power valves (L, L, L, L),'}{'b': 1', '2', '1', '1', '2', '2', '1', '2, 'i': a', 'b', 'a', 'b, 'wherein each pilot valve (P, P) switches at least two power valves (L, L; L, L) coupled pneumatically with the pilot valve (P, P) and'}{'b': 1', '2', '7', '18', '20', '19', '21, 'wherein the valve group () is provided with a housing () having an electrical signal input (), a compressed-air port (), at least one vent port () and at least one working outlet (, ),'}{'b': 2', '3', '4, 'wherein the housing () has layered structure with at least one pilot-stage housing () and at least one power-stage housing () connected thereto along a substantially plane separating face (T),'}{'b': 1', '2', '1', '2', '3', '4', '3', '4', '1', '2', '1', '1', '2', '2', '1', ...

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Номер записи: 11
18-02-2016 дата публикации

Actuator system

Номер: US20160047478A1
Автор: Charles E. Reuter, Richard H. Bostiga
Принадлежит: Hamilton Sundstrand Corp

An actuator system having various features is disclosed. An actuator system may have a first and a second electrohydraulic servo valve. A control selector may connect one of the electrohydraulic servo valves to a cylinder and may isolate the other electrohydraulic servo valve to ameliorate leakage in response to a switching solenoid valve operating. In this manner, one electrohydraulic servo valve may be connected to a cylinder to operate the cylinder, and the other electrohydraulic servo valve may be isolated from the cylinder, for example, to provide a standby electrohydraulic servo valve.

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Номер записи: 12
03-03-2022 дата публикации

DRIVE SYSTEM OF SCRAPER CONVEYOR AND CONTROL METHOD

Номер: US20220063927A1
Автор: Cao Guohua, DAI Kaiyu, Jiang Fan, Li Wei, Li Xiang, LU Hao, Peng Yuxing, Shen Gang, Tang Yu, Zhou Gongbo, Zhu Zhencai
Принадлежит:

The present invention discloses a drive system of a scraper conveyor and a control method. The drive system includes a nose sprocket, a tail sprocket, a nose sprocket drive mechanism, and a tail sprocket drive mechanism, where the nose sprocket drive mechanism is a hydraulic motor I, and the tail sprocket drive mechanism is a hydraulic motor II; and a hydraulic system that drives the hydraulic motor I and a hydraulic system that drives the hydraulic motor II include same hydraulic elements, and both include a three-position four-way solenoid directional valve, a two-position two-way solenoid directional valve, a two-position three-way solenoid directional valve, an accumulator, and an oil supplement valve group. The present invention is applicable to rapid starting and stopping of the scraper conveyor in a heavy load status while adjusting chain tension in real time, thereby resolving a power imbalance problem in a dual-drive system, and has a simple structure and a long service life.

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Номер записи: 13
25-02-2021 дата публикации

Pneumatic trip valve

Номер: US20210054947A1
Автор: George Wang
Принадлежит: EASYTORK AUTOMATION CORP

A pneumatic trip valve that may include a valve structure, a switch plate air path and an internal check valve. In various aspects, the pneumatic trip valve may be connected to a valve positioner, an actuator, or a combination thereof to control the operation of a fluid process control valve. In operation, the Pneumatic trip valve acts to put the actuator in a preset fail-safe position when the actuator loses sufficient pressure or communication from a main air supply, stored pressurized air from an actuator air reservoir, and/or an external air reservoir.

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Номер записи: 14
23-02-2017 дата публикации

Spool valve with special metering configuration for hydraulic valve main control speed

Номер: US20170051836A1
Автор: Joshua Matthew Guarino
Принадлежит: Parker Hannifin Corp

A spool component for use in a spool valve has a cylindrical body including a first diameter portion and a second diameter portion, the first diameter portion having a diameter that is larger than a diameter of the second diameter portion. A metering notch is cut into the first diameter portion and extends toward the second diameter portion. The metering notch includes a first angle cut and a second angle cut that are sloped at different depth angles toward the first diameter portion. A spool valve assembly includes a housing defining a bore, and the spool component, which is moveable within the bore along a stroke distance comprising a metering band for metering a flow of fluid across the spool component. The metering notch provides precise metering of the flow of fluid across the spool component based on the different depth angles of the cuts in the metering notch.

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Номер записи: 15
01-03-2018 дата публикации

Reversible Flow Path Construction

Номер: US20180058043A1
Автор: Beckhusen Jordan R.
Принадлежит: CATERPILLAR INC.

A flow control manifold that routes pressurized fluid from one of a first fluid manifold connection and a second fluid manifold connection of the flow control manifold to an input of a work tool and directs return fluid from an outlet of the work tool to the other of the first and second fluid manifold connections not receiving pressurized fluid. 1. A flow control manifold for connecting a work tool to a work machine , comprising:a first fluid manifold connection and a second fluid manifold connection, the first and second fluid manifold connections in fluid communication with the work machine;an input configured to supply pressurized fluid from the work machine to the work tool and an outlet configured to receive return fluid from the work tool;a first passage fluidly connecting the first fluid manifold connection to the input and conveying pressurized fluid therethrough, the first passage comprising a first check valve that opens in the direction of the input;a second passage fluidly connecting the outlet to the second fluid manifold connection and conveying return fluid therethrough, the second passage comprising a second check valve that opens in the direction of the second fluid manifold connection;a third passage fluidly connecting the second fluid manifold connection to the input and conveying pressurized fluid therethrough, the third passage comprising a directional control valve that opens to permit fluid to flow through the third passage in response to the presence of the pressurized fluid in the third passage and comprising a third check valve that opens in the direction of the input; anda fourth passage fluidly connecting the outlet to the first fluid manifold connection and conveying return fluid therethrough, the fourth passage comprising a fourth check valve that opens in the direction of the first fluid manifold connection.2. The flow control manifold of claim 1 , wherein the first and third passages include a standard orifice adjacent the input.3. ...

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Номер записи: 16
02-03-2017 дата публикации

ELECTROMAGNETIC PROPORTIONAL CONTROL VALVE SYSTEM

Номер: US20170059057A1
Автор: Yamaji Kenpei
Принадлежит:

In an electromagnetic proportional control valve system, left and right position control apparatuses and are disposed on the both ends of a main spool in a three position proportional control valve and perform stroke control for the main spool. The left and right position control apparatus respectively comprise position feedback springs and , pilot control valves and , and proportional solenoids and . The pilot spool is moved, for operative control, in response to a compression force of a position feedback spring and an electromagnetic force of the proportional solenoid. In addition, the output pressure is applied to both ends of the pilot spool so that control is performed to generate output pressure with a negative characteristic against the electromagnetic force of the proportional solenoids. 1. An electromagnetic proportional control valve system configured to comprise a three position proportional control valve and left and right position control apparatuses which , provided on both ends of a main spool in the three position proportional control valve to perform stroke control for the main spool , respectively comprises a compressible position feedback spring which confronts with a main spool end , a pilot control valve disposed so as to confront to the position feedback spring in opposition to the main spool end across the position feedback spring , and a proportional solenoid providing electromagnetic expanding force applicable to an opposite end of pilot spool in the pilot control valve against the position feedback spring ,wherein the pilot spool is configured to be moved in response to compression force of the position feedback spring and electromagnetic force of the proportional solenoid in order to control the pilot control valve operatively, with its output pressure applied on the both ends of the pilot spool additionally, so that control is performed to generate the output pressure—with a negative characteristic against the electromagnetic force of the ...

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Номер записи: 17
20-02-2020 дата публикации

Electrohydraulic Counterbalance and Pressure Relief Valve

Номер: US20200056631A1
Автор: Pena Oscar, Zähe Bernd
Принадлежит:

An example valve includes a main stage, a pilot stage, and a solenoid actuator. The main stage includes a sleeve and a piston axially movable within the sleeve. The piston defines a cavity therein. The pilot stage includes a pilot pin received at, and axially movable in, the cavity of the piston, where the piston forms a pilot seat at which the pilot pin is seated when the valve is in a closed state. The solenoid actuator includes a solenoid coil, an armature, and a solenoid spring. The solenoid spring applies a biasing force in a distal direction on the pilot pin to seat the pilot pin at the pilot seat. Energizing the solenoid coil causes the armature to move in a proximal direction, thereby reducing the biasing force that the solenoid spring applies on the pilot pin. 1. A valve comprising:a plurality of ports comprising: a first port, a second port, and a pilot port;a piston axially movable within a sleeve, wherein the piston comprises a cavity therein, and wherein the sleeve comprises a piston seat at which the piston is seated when the valve is in a closed state;a pilot pin received at, and axially movable in, the cavity of the piston, wherein the piston forms a pilot seat at which the pilot pin is seated when the valve is in the closed state; anda solenoid actuator comprising a solenoid coil, an armature, and a solenoid spring, wherein the solenoid spring applies a biasing force on the pilot pin in a distal direction to seat the pilot pin at the pilot seat,wherein when pressurized fluid is received at the first port, the pressurized fluid applies a first force on the pilot pin in a proximal direction opposite the distal direction, and when a pilot pressure fluid signal is received through the pilot port, the pilot pressure fluid signal applies a second force on the pilot pin in the proximal direction, such that when the first force and the second force overcome the biasing force of the solenoid spring, the pilot pin moves axially in the proximal direction off ...

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Номер записи: 18
20-02-2020 дата публикации

HYDRAULIC CONTROL VALVE

Номер: US20200056635A1
Автор: Bialosky Evan D., Graham Scott C., JR. Richard F., Karsten Frank C., Lacey Daniel S., Sailer, Webel Roger A.
Принадлежит:

A new means of achieving a valve float position in a closed centered hydraulic control valve. The valve has a main spool position whereby pressure compensator load sense control pressure is drained to tank through the main spool. Secondly, a pin acts on the pressure compensator to prevent the main pump flow from reaching the main section spool. Finally, the new spool position adds a connection from the consumer to tank, enabling a float position. 1. A pressure compensated hydraulic control valve comprising:a pair of consumer workports for attachment to a hydraulic implement;a pump port for attachment to a variable displacement pump;a tank port for attachment to a hydraulic fluid tank; a neutral spool position in which the pressure compensated pump flow channel is blocked and the variable displacement pump load sense channel is connected to the tank channel,', 'a first power position connecting the pressure compensated pump flow channel to a first one of the pair of consumer workports, connecting the first one of the pair of consumer workports to the variable displacement pump load sense channel, and connecting a second one of the pair of consumer workports to the tank channel,', 'a second power position connecting the pressure compensated pump flow channel to the second one of the pair of consumer workports, connecting the second one of the pair of consumer workports to the variable displacement pump load sense channel, and connecting the first one of the pair of consumer workports to the tank channel, and', 'a fourth spool position connecting both of the pressure compensated pump flow channel and the tank channel to both of the pair of consumer workports, the fourth spool position further connecting the variable displacement pump load sense channel to the tank channel;, 'a main valve spool including passages to selectively connect a pressure compensated pump flow channel from the pump port, a tank channel to the tank port, a variable displacement pump load sense ...

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Номер записи: 19
17-03-2022 дата публикации

Failsafe valve for geared rotary actuator

Номер: US20220081103A1
Автор: Lowell Van Lund Larson, Robert Justin SIELAFF
Принадлежит: Moog Inc

A failsafe vale provides “Hole-In-The-Wall” failsafe functionality for thin-wing aircraft control surface actuation systems having a geared rotary actuator powered by a hydraulic rotary motor. The failsafe valve is associated with the hydraulic rotary motor and mechanically connected to the control surface, and enables the flight control surface to return to an aerodynamically neutral failsafe position if electrical control and/or hydraulic pressure is lost. When the failsafe valve receives a normal command pressure from the hydraulic system, the valve is inactive and the actuation system operates normally. However, if there is a loss of electrical command capacity to control hydraulic valves and/or a loss of hydraulic pressure, the failsafe valve is activated and connects one of the motor hydraulic control lines to the case return line for the motor if the control surface is away from its failsafe position. Consequently, the control surface will be hydraulically powered or aerodynamically ratcheted to its failsafe position in the failure event.

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Номер записи: 20
28-02-2019 дата публикации

DIRECT INPUT PILOT OPERATED SERVO VALVE

Номер: US20190063469A1
Автор: Kalbfeld Michael D., Otth Alfred W.
Принадлежит:

An electro hydraulic servo valve and a method of controlling pressure therein includes a first stage unit including a moveable direct drive valve, a second stage unit including a centering spring and a second stage spool valve that is fluidly connected to the moveable direct drive valve, and at least one pressure feedback fluid line fluidly connected to the first stage unit. The moveable direct drive valve selectively supplies fluid pressure to the second stage unit. Motion of the second stage unit is arrested using the centering spring and motion of the first stage unit is arrested when pressure is fed back to the first stage unit. A supply pressure or a return pressure is metered using the pressure feedback fluid line. 1. An electro hydraulic servo valve comprising:a first stage unit including a moveable direct drive valve;a second stage unit including a centering spring and a second stage spool valve that is fluidly connected to the moveable direct drive valve, wherein the moveable direct drive valve selectively supplies fluid pressure to the second stage unit, wherein motion of the second stage unit is arrested using the centering spring; andat least one pressure feedback fluid line fluidly connected to the first stage unit, wherein motion of the first stage unit is arrested when pressure is fed back to the first stage unit, and wherein a supply pressure or a return pressure is metered using the pressure feedback fluid line.2. The electro hydraulic servo valve according to claim 1 , wherein the at least one pressure feedback fluid line includes at least one control orifice claim 1 , whereby movement of the first stage unit is damped.3. The electro hydraulic servo valve according to claim 1 ,wherein the moveable direct drive valve includes a first first stage spool valve, a second first stage spool valve, and a motor that drives the first first stage spool valve and the second first stage spool valve,wherein the second stage spool valve has a first end and a ...

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Номер записи: 21
05-03-2020 дата публикации

System and method for spool fault detection of solenoid valves using electrical signature

Номер: US20200072892A1
Автор: Ananda PASALA, Anil GHEGADE, Marco BISON, Mayura Arun Madane, Nilesh SURASE, Prachi Zambare, Samuel Lazarus, Shruti ZAPDEKAR
Принадлежит: Eaton Intelligent Power Ltd

The present disclosure relates to a system for monitoring a solenoid operated valve including at least one coil and at least one spool. The system compares a normalized current signature and a normalized current signature comparator to determine a spool fault condition

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Номер записи: 22
26-03-2015 дата публикации

DIRECT DRIVE ROTARY VALVE

Номер: US20150083256A1
Автор: Weber Gregory Bruce
Принадлежит: Moog Inc.

A rotary valve comprises a bushing and a cylindrical spool rotatably received by the bushing. The rotary valve avoids redundant control edge pairs by having exactly one first supply edge pair (P-C1) for controlling a first fluid supply path, exactly one second supply edge pair (P-C2) for controlling a second fluid supply path, exactly one first return edge pair (C2-R1) for controlling a first fluid return path, and exactly one second return edge pair (C1-R2) for controlling a second fluid return path. A first angle between the first supply edge pair and the first return edge pair, and a second angle between the second supply edge pair and the second return edge pair, are each greater than or equal to 120 degrees and less than 180 degrees. Geometric simplicity is achieved by tolerating a limited degree of force imbalance in valve operation. 1. A rotary valve for metering fluid flow , the rotary valve comprising:a bushing including an axially extending cylindrical bore defining an inner wall of the bushing; anda cylindrical spool received by the cylindrical bore for rotation relative to the bushing about a central axis;the bushing and the spool being configured to provide a first fluid supply path, a second fluid supply path, a first fluid return path, and a second fluid return path;the bushing and the spool including respective edges defining a first supply edge pair (P-C1), wherein the respective edges of the first supply edge pair are angularly displaceable relative to one another to open and close the first fluid supply path;the bushing and the spool further including respective edges defining a second supply edge pair (P-C2), wherein the respective edges of the second supply edge pair are angularly displaceable relative to one another to open and close the second fluid supply path;the bushing and the spool further including respective edges defining a first return edge pair (C2-R1), wherein the respective edges of the first return edge pair are angularly ...

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Номер записи: 23
23-03-2017 дата публикации

Control Valve Compensation System

Номер: US20170082122A1
Автор: Rost Alvin Stanley
Принадлежит:

A Control Valve Compensation System for producing both a pre-compensated and a post-compensated load sensing hydraulic directional control valve module, wherein both configurations use the same components except for a sliding compensating component. The Control Valve Compensation System generally includes a hydraulic directional control valve housing which is adapted to be easily-interchangeable between a load sensing pre-compensated pressure configuration and a load sensing post-compensated pressure configuration by simply removing and replacing a different compensator assembly within the housing. The compensator assembly is adapted to direct oil flow through the housing while simultaneously providing compensation for the valve function. Directional valve assemblies may be provided, with the valve assemblies functioning to provide post-compensated functions, pre-compensated functions, and mixed pre- and post-compensated functions. These directional valve functions can be re-configured in the field by simply swapping the compensator assemblies to produce the desired functionality of the end-user at that particular time. 1. A control valve compensation system , comprising:a valve body comprising a plurality of internal flow passageways and a plurality of work ports;a selectable valve spool adjustably positioned within the valve body;a pre-compensation assembly removably positioned within the valve body, wherein the valve body is adapted to function as a pre-compensated valve when the pre-compensation assembly is positioned with the valve body; anda post-compensation assembly removably positioned within the valve body, wherein the valve body is adapted to function as a post-compensated valve when the post-compensation assembly is positioned with the valve body.2. The control valve compensation system of claim 1 , wherein the pre-compensation assembly is parallel with respect to the selectable valve spool when the pre-compensation assembly is positioned within the ...

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Номер записи: 24
25-03-2021 дата публикации

HYDRAULIC CONTROL VALVE UNIT

Номер: US20210088146A1
Автор: Meid Michael, Traut Sebastian
Принадлежит:

A hydraulic control valve unit includes an input port hydraulically coupled to a pump, a working port hydraulically coupled to the working load, and a return port connected to a hydraulic tank. The unit includes a control slide movable into different working positions in an axial direction for controlling a hydraulic flow between the hydraulic ports and a slide housing surrounding the control slide. The control slide includes a control segment which is delimited in the axial direction by a control edge, and cooperates with an axial housing segment of the slide housing for controlling a flow cross section for hydraulic flow at the control segment. The control slide is rotationally driven about an axis of rotation in a rotational direction. The control edge of the control segment or the housing segment cooperating with the control segment is designed such that the flow cross section has a different size depending on a rotational position of the control slide. 1. A hydraulic control valve unit configured to actuate a hydraulic working load , comprising:a plurality of hydraulic ports comprising an input port configured to be hydraulically coupled to a pump, a working port configured to be hydraulically coupled to the working load, and a return port configured to be connected to a hydraulic tank;a control slide movable into different working positions in an axial direction and in a rotational direction about an axis of rotation; anda slide housing with an inner diameter that surrounds the control slide such that the control slide is movable in the axial direction and in the rotational direction within the inner diameter of the slide housing to control hydraulic flow between the plurality of hydraulic ports;wherein the control slide comprises a first control segment which is delimited in the axial direction by a first control edge;wherein the slide housing comprises a first housing segment that cooperates with the first control segment to control a first flow cross ...

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Номер записи: 25
05-05-2022 дата публикации

HYDRAULIC BLOCK OF ELECTRONIC BRAKING DEVICE FOR VEHICLE

Номер: US20220135011A1
Автор: AHN Sung Ki
Принадлежит:

A hydraulic block of an electronic braking device for a vehicle includes a first input port and a second input port configured to receive a brake fluid from a main braking system, at least one oil chamber connected to one input port of the first input port and the second input port, a first output port and a second output port configured to discharge the brake fluid to a plurality of wheel brake apparatuses, a first inlet line configured to connect the first input port and the first output port to each other, and a second inlet line configured to connect the second input port and the second output port to each other, a first outlet line bifurcated from the first inlet line, a second outlet line bifurcated from the second inlet line, and a valve mounting unit mounted with a plurality of valves.

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Номер записи: 26
05-05-2022 дата публикации

Rotary servo valve

Номер: US20220136533A1
Автор: Andrew Collins, Martin Macdonald
Принадлежит: Domin Fluid Power Ltd

A rotary servo valve comprising a housing portion ( 105 ) defining a cylindrical cavity ( 107 ) and a first layer of ports. The rotary servo valve further comprises two opposing indented sides and two opposing sides having an increased radius relative to the indented sides, each side of increased radius extending between the two indented sides. The spool portion ( 103 ) is mounted for rotation relative to the cylindrical cavity ( 107 ), from a neutral position so as to prevent fluid flow through the valve, to an open position in which a fluid flow path is provided.

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Номер записи: 27
09-04-2015 дата публикации

HYDRAULIC DIRECTIONAL CONTROL VALVE

Номер: US20150096632A1
Автор: BRUESER CHRISTIAN, REMMELMANN ANDREAS
Принадлежит:

A hydraulic directional control valve for activating a hydraulic load, comprising a housing with a pump connection for connecting to a pressure source, a tank connection for connecting to a hydraulic fluid reservoir and a first and second working connection for connecting to the hydraulic load, and a first and a second valve slide, which are held in the housing so as to be linearly movable in a displacement direction. 1. A hydraulic directional control valve for activating a hydraulic load , comprising:a housing having a pump connection for connecting to a pressure source, a tank connection for connecting to a hydraulic reservoir, and a first and a second working connection for connecting to the hydraulic load;a first and a second valve slide, slidably received by the housing, the valve slides being movable linearly in a displacement direction in the housing in order to activate the pump connection, the tank connection and the working connection via control edges arranged on the valve slides; andan actuating member operatively connected with the first and the second valve slides in order to press the valve slide in the displacement direction relative to the housing.2. The hydraulic directional control valve of claim 1 , wherein:the first valve slide comprises two first control edges for activating the first working connection, and the second valve slide comprises two second control edges for activating the second working connection.3. The hydraulic directional control valve of claim 1 , wherein:the actuating member has a control cam arrangement for acting upon the valve slides.4. The hydraulic directional control valve of claim 3 , wherein:the valve slides are jointly displaceable by the control cam arrangement relative to the housing, and the position of the valve slides relative to one another in the displacement direction is adjustable.5. The hydraulic directional control valve of claim 3 , wherein:the control cam arrangement has a first and a second cam contour ...

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Номер записи: 28
12-05-2022 дата публикации

FLIGHT CONTROL SYSTEM COMPRISING A HYDRAULIC SERVO ACTUATOR

Номер: US20220144414A1
Автор: Gaile Anton, Roeben Tobias, Sauterleute Thomas
Принадлежит:

The disclosure relates to a flight control system comprising at least one hydraulic servo actuator, wherein the servo actuator includes a two-stage electrohydraulic servo valve, wherein the servo valve comprises a pilot stage in which the control current is translated into a hydraulic control pressure, and a power stage in which a valve slide is moved in response to the control pressure in order to adjust the throughflow direction and throughflow cross-section of the valve. The disclosure furthermore relates to an aircraft comprising such a flight control system. 1. A control system of an aircraft , wherein the system includes a control unit that is configured to generate a control current in response to a control signal , and wherein the system furthermore includes a hydraulic servo actuator for translating the control current into a movement of a control surface of the aircraft , wherein the servo actuator includes a two-stage electrohydraulic servo valve , wherein the servo valve comprises a pilot stage in which the control current is translated into a hydraulic control pressure , and comprises a power stage in which a valve slide is moved in response to the control pressure in order to adjust a throughflow direction and a throughflow cross-section of the valve ,whereinthe control unit is arranged on the aircraft decentrally and at a distance from a central flight control computer, and that the servo valve includes an electric feedback.2. The system according to claim 1 , wherein the servo valve has no mechanical feedback.3. The system according to claim 1 , wherein the system includes a sensor for determining a position of the valve slide claim 1 , which is signal-connected to the decentral control unit.4. The system according to claim 3 , wherein the sensor is a linear variable transducer (LVTD).5. The system according to claim 3 , wherein the decentral control unit is configured to generate the control current by taking account of a regulation component from ...

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Номер записи: 29
06-04-2017 дата публикации

ZONED MANIFOLD ASSEMBLY FOR SOLENOID VALVE CONTROL SYSTEM

Номер: US20170097102A1
Автор: Atkin Bradly Joe, De Carolis Enrico, Hundt Michael W.
Принадлежит:

A zoned fluid control system in a valve manifold system has a plurality of manifold blocks connected together and a plurality of control valves mounted to the manifold blocks with the control valves being electrically actuated and pilot pressure operated. The plurality of manifold blocks forms at least first and second separate pilot pressure passages of a respective first zone and second zone not connected to each other for supplying a respective first set and second set of control valves with independently controlled pilot pressure. A pilot supply valve selectively supplies pilot pressure and shuts off pilot pressure to the second pilot pressure passage without affecting the pilot pressure to the first pilot pressure passage thereby disabling the second set of control valves as a separate zone independent from the first set of control valves. 1. A valve manifold assembly having a plurality of manifold blocks connected together with valve stations on one surface of each manifold block , said valve manifold assembly comprising:a first pilot pressure supply being operably connectable to a first set of control valves that are electrically actuated;said first set of control valves being mounted to a first set of valve stations on said manifold blocks;a first pilot pressure passage being operably connectable to said first pilot pressure supply for supplying pilot pressure to said first set of valve stations of said valve manifold assembly;a second pilot pressure supply being operably connectable to a second set of control valves that are electrically actuated;said second set of control valves being mounted to a second set of valve stations on said manifold blocks; anda second pilot pressure passage being operably connectable to a pilot supply valve for selectively supplying zoned pilot pressure to said second set of valve stations of said valve manifold assembly such that said second set of control valves may be deactuated if pilot pressure is shut off thereto while ...

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Номер записи: 30
29-04-2021 дата публикации

Hydraulic valve and system

Номер: US20210121338A1
Автор: Chad C. Souke, Ross T. Lucas
Принадлежит: Stryker Corp

An apparatus includes a hydraulic circuit that is configured to selectively open fluid communication between one portion of the hydraulic circuit and another portion of the hydraulic circuit, such as a reservoir, based on the flow of the hydraulic fluid in the one portion. When the flow of hydraulic fluid exceeds a selected threshold in the one portion of the hydraulic circuit, the flow of fluid urges the opening of a hydraulic component of the hydraulic circuit to allow fluid communication between the one portion and the reservoir to discharge fluid from the one portion.

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Номер записи: 31
19-04-2018 дата публикации

SPOOL AND BODY ARCHITECTURES FOR THREE-POSITION DIRECTIONAL CONTROL VALVES

Номер: US20180106386A1
Автор: Goldfarb Michael, Mitchell Jason
Принадлежит:

A directional-control valve is typically comprised of a valve spool that slides linearly within a valve body. The valve body typically includes five internal ports, which are covered or exposed as the spool slides within the body. The typical five-internal-port architecture precludes certain combinations of port connectivity when the spool is in the center position. For example, when the spool is in the center position, providing connectivity between the actuator ports, while simultaneously providing fluid isolation of the supply and exhaust ports, is not directly achievable with a standard five-port architecture. This application describes three embodiments that enable the aforementioned port connectivity when the spool is in the center position. 18.-. (canceled)9. A directional-control valve comprising a valve spool within a valve body , wherein:the valve spool is configured to move within the valve body between a first position, a second position and a third position;the third valve spool position lies between the first and the second valve spool positions; five external ports arranged between a first end of the valve body and a second end of the valve body, comprising a first exhaust port, a first actuator port, an inlet port, a second actuator port, and a second exhaust port;', 'further comprising eight internal ports arranged between a first end of the valve body and a second end of the valve body, and wherein the eight internal ports are in fluid communication with the five external ports in the following order along the valve body: the first exhaust port, the first actuator port, the inlet port, the first actuator port, the second actuator port, the inlet port, the second actuator port and the second exhaust port., 'and wherein the valve body comprises10. The valve of claim 9 , where the second and fourth internal ports claim 9 , and the fifth and seventh internal ports claim 9 , respectively claim 9 , are in fluid communication.11. The valve of claim 10 , ...

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Номер записи: 32
02-04-2020 дата публикации

HYDRAULIC BRAKING SYSTEM AND METHOD

Номер: US20200101952A1
Автор: Arsenault Tyler, Mastrocola Naison E.
Принадлежит:

A braking system including a brake actuator, a control valve, a control assembly, and at least one pressure sensor. The control valve is disposed to direct hydraulic fluid to the brake actuator at a rate corresponding to a magnitude of a control signal. The control assembly includes a mixed-mode control system. The at least one pressure sensor is configured to measure a pressure of the hydraulic fluid to the brake actuator. The control assembly is configured to determine a position of the brake actuator. The mixed-mode control system is configured to determine a position command and a pressure command. The mixed-mode control system is configured to adjust the magnitude of the control signal based on at least one of the position command and the pressure command so as to reposition the brake actuator from a first position to a second position. 1. A method for mixed-mode logic control for a hydraulic braking system comprising:applying a control signal to a control valve and directing hydraulic fluid, with the control valve, to a brake actuator based on a magnitude of the control signal;measuring a pressure of the hydraulic fluid to the brake actuator;determining a position of the brake actuator;determining a position command and a pressure command based on the position of the brake actuator and the pressure, respectively; andadjusting the magnitude of the control signal based on at least one of the position command and the pressure command so as to reposition the brake actuator from a first position to a second position.2. The method of claim 1 , further comprising measuring a flow rate of the hydraulic fluid to the brake actuator.3. The method of claim 2 , wherein the position of the brake actuator is a flow-based position based on the flow rate of the hydraulic fluid.4. The method of claim 1 , wherein adjusting the magnitude of the control signal is based only on the position command as the brake actuator moves between a running clearance position and a zero torque ...

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Номер записи: 33
29-04-2021 дата публикации

Failsafe Electro-hydraulic Servo Valve

Номер: US20210123458A1
Автор: Loos Jordan Loren
Принадлежит: WOODWARD, INC.

The subject matter of this specification can be embodied in, among other things, a fluid valve assembly that includes a first fluid port, a second fluid port, a third fluid port, a valve spool configured to be positioned at a first position, a second position away from the first position, a third position away from the first position opposite the second valve position, the valve spool defining a first fluid duct configured to fluidly connect the first fluid port to the second fluid port in the first valve position, a second fluid duct configured to fluidly connect the first fluid port to the third fluid port in the second valve position, and a third fluid duct configured to fluidly connect the first fluid port to the second fluid port in the third valve position. 1. A fluid valve assembly comprising:a first fluid port;a second fluid port;a third fluid port; a first fluid duct configured to fluidly connect the first fluid port to the second fluid port in the first valve position;', 'a second fluid duct configured to fluidly connect the first fluid port to the third fluid port in the second valve position; and', 'a third fluid duct configured to fluidly connect the first fluid port to the second fluid port in the third valve position; and, 'a valve spool configured to be positioned at a first position, a second position away from the first position, a third position away from the first position opposite the second valve position, the valve spool definingan electrohydraulic valve comprising a torque motor configured to urge the valve spool into at least the first position and the second position.2. The fluid valve assembly of claim 1 , wherein the valve spool is further configured to be positioned at a fourth position in which the valve spool is configured to prevent fluid flow among the first fluid port claim 1 , the second fluid port claim 1 , and the third fluid port.3. (canceled)4. The fluid valve assembly of claim 1 , wherein the electrohydraulic valve is ...

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Номер записи: 34
11-04-2019 дата публикации

ZONED MANIFOLD ASSEMBLY FOR SOLENOID VALVE CONTROL SYSTEM

Номер: US20190107217A1
Автор: Atkin Bradly Joe, De Carolis Enrico, Hundt Michael W.
Принадлежит:

A zoned fluid control system in a valve manifold system has a plurality of manifold blocks connected together and a plurality of control valves mounted to the manifold blocks with the control valves being electrically actuated and pilot pressure operated. The plurality of manifold blocks forms at least first and second separate pilot pressure passages of a respective first zone and second zone not connected to each other for supplying a respective first set and second set of control valves with independently controlled pilot pressure. A pilot supply valve selectively supplies pilot pressure and shuts off pilot pressure to the second pilot pressure passage without affecting the pilot pressure to the first pilot pressure passage thereby disabling the second set of control valves as a separate zone independent from the first set of control valves. 1. A sandwich block for being interposed between a manifold block and a control valve that is solenoid actuated and pilot pressure operated; said sandwich block comprising:an inlet for receiving pilot pressure from a pilot supply valve external from said manifold block; andsaid inlet having a passage to an outlet operably connectable to said control valve such that said pilot supply valve can selectively supply pilot pressure to said control valve.2. A valve manifold block for zoned fluid control having a first zone and second zone between connected valve manifold blocks , said valve manifold block comprising:a plurality of fluid pathways therethrough, and ports forming a first and second valve station and controlled by respective first and second control valves operably mounted thereto;a circuit board passage passing therethrough from a first side to a second side of said manifold block;a pilot passage inlet port and a pilot passage outlet port on respective first and second sides, said pilot passage inlet port being part of said first zone and not in operable communication with said pilot passage outlet port which is part ...

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Номер записи: 35
26-04-2018 дата публикации

BOOM CONTROL WITH INTEGRATED VARIABLE RETURN METERING

Номер: US20180112684A1
Автор: Mahrenholz John R., Raszga Calin
Принадлежит:

A hydraulic boom control system for a forestry machine includes a pump for pressurizing a hydraulic fluid on a high pressure side, a reservoir for storing hydraulic fluid on a low pressure side, and a first hydraulic cylinder including a cap end and a rod end. The first hydraulic cylinder is configured to actuate the hoist of the boom. A second hydraulic cylinder includes a cap end and a rod end and is configured to actuate the stick of the boom. A first control valve is operable to control the first hydraulic cylinder. A second control valve is operable to control the second hydraulic cylinder. A variable return metering valve is fluidly connected to at least one of the first or second control valves. The variable return metering valve is operable to modulate shared hydraulic fluid flow between the first hydraulic cylinder and the second hydraulic cylinder. 1. A hydraulic boom control system for a forestry machine , the boom including a hoist and a stick , the hydraulic boom control system comprising:a pump for pressurizing a hydraulic fluid on a high pressure side of a hydraulic circuit;a reservoir for storing hydraulic fluid on a low pressure side of the hydraulic circuit;a first hydraulic cylinder including a cap end and a rod end, the first hydraulic cylinder configured to actuate the hoist;a second hydraulic cylinder including a cap end and a rod end, the second hydraulic cylinder configured to actuate the stick;a first control valve operable to control the first hydraulic cylinder;a second control valve operable to control the second hydraulic cylinder; anda variable control metering valve fluidly connected to at least one of the first or second control valves,wherein the variable control metering valve is operable to modulate shared hydraulic fluid flow between the first hydraulic cylinder and the second hydraulic cylinder.2. The hydraulic boom control system of claim 1 , wherein the variable control metering valve is a first variable control metering valve ...

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Номер записи: 36
07-05-2015 дата публикации

DEVICE FOR CONTROLLING THE MOVEMENT OF A HYDRAULIC CYLINDER, PARTICULARLY FOR HYDRAULIC MACHINES

Номер: US20150122114A1
Автор: Steinhilber Armin
Принадлежит:

A control device includes a valve, having a body connected to the first chamber of a cylinder via a first hydraulic connection and to the second chamber of the cylinder via a second hydraulic connection. The control device includes a first hydraulic duct connected to a first actuating-fluid source, and a second hydraulic duct connected to a second actuating-fluid source. The hydraulic ducts communicate with the body of the valve. The valve further includes a distribution device that is movable within the body of the valve, between a first position, in which the distribution device places the first hydraulic connection and the first hydraulic duct in fluid communication, and a second position, in which the distribution device places the second hydraulic connection and the second hydraulic duct in fluid communication. 1. A control device controlling the movement of a hydraulic cylinder , comprising a body forming a first chamber and a second chamber which are designed to receive an actuating fluid , said chambers being separated from one another by a piston able to move in the body in a first direction in which the volume of the first chamber increases while the volume of the second chamber decreases , and in a second direction in which the volume of the second chamber increases while the volume of the first chamber decreases , the control device comprising a valve comprising a body connected to the first chamber of the cylinder by a first hydraulic connection and to the second chamber of the cylinder by a second hydraulic connection , wherein the valve further includes a first hydraulic duct intended to be connected to a first source of actuating fluid , and a second hydraulic duct intended to be connected to a second source of actuating fluid , said hydraulic ducts being in communication with the body of the valve , said valve further comprising a distribution device able to move in the body of the valve between a first position in which the distribution device ...

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Номер записи: 37
13-05-2021 дата публикации

PROCESS CONTROL DEVICE

Номер: US20210140450A1
Автор: Lechler Simon, Muller Axel, Spreitzenbarth Rainer
Принадлежит:

A process control device has an electropneumatic control unit which is used for activating a pneumatic actuating drive. The control unit has a fastening module by means of which it is fastened to a drive housing of the actuating drive. The control unit includes an interface plate which is separate from the fastening module, is mounted on a top side of the fastening module and is fluidically connected, through the fastening module, to the actuating drive. The control unit includes an electrically actuatable control valve device which is fixed to the fastening module by being mounted on the interface plate fixed to the fastening module. In this way, a process control device can be produced in an easily and variably configurable manner. 1. A process control device comprising an electropneumatic control unit which is designed to control a pneumatic actuating drive and which comprises a fastening module which has at a lower side a fastening interface which is designed for fastening to a drive housing of the actuating drive and which has an electrically actuatable control valve device which is fixed to the fastening module and which contains at least one control valve and which communicates with at least one drive channel extending through the fastening module fluid connection to the actuating drive , wherein the control unit has an interface plate which is separate from the fastening module and which is mounted on the fastening module at the upper side thereof facing away from the fastening interface and through which an interface plate fluid channel system extends which communicates with the at least one drive channel of the fastening module , wherein the interface plate at the upper side thereof facing away from the fastening module has a mechanical-pneumatic assembly interface on which the control valve device is mounted with simultaneous communication with the interface plate fluid channel system.2. The process control device according to claim 1 , wherein the ...

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Номер записи: 38
14-05-2015 дата публикации

TRAVEL CONTROL VALVE

Номер: US20150128583A1
Автор: FUJIWARA Takeshi
Принадлежит: KAYABA INDUSTRY CO., LTD.

A travel control valve includes a valve body and a spool. The valve body includes a first pump port connected on an upstream side from a drive control valve, a first connection port connected on a downstream side from the drive control valve, a second pump port connected to a second pump, and a second connection port connected to a second circuit system. The travel control valve can switch a communication opening between the first pump port and the first connection port to a large opening throttle position in which the communication opening remains smaller than that between the second pump port and the second connection port, and a small opening throttle position in which the communication opening remains smaller than that in the large opening throttle position. 1. A travel control valve used in a power shovel comprising:a first circuit system that is connected to at least one control valve for operating an actuator and connected to a drive control valve for controlling a fluid pressure motor for driving a wheel type travelling body on an uppermost stream;a first pump that is connected to the first circuit system and adapted to supply a working fluid;a second circuit system that is connected to at least one control valve for operating an actuator;a second pump that is connected to the second circuit system and adapted to supply a working fluid;a valve body; anda spool that is slidably arranged inside the valve body, whereinthe valve body includes:a first pump port that is connected to the first pump on an upstream side from the drive control valve;a first connection port that communicates with the first pump port and is connected on a downstream side from the drive control valve of the first circuit system;a second pump port that is connected to the second pump; anda second connection port that communicates with the second pump port and is connected to the second circuit system, whereina communication opening between the first pump port and the first connection port ...

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Номер записи: 39
04-05-2017 дата публикации

CONNECTING APPARATUS

Номер: US20170122344A1
Автор: BIWERSI Sascha Alexander, HETTIGER Marcus, STOENNER Christoph
Принадлежит:

The invention relates to a connecting apparatus, provided for fluid-conducting connection to at least one main component (), which component has a plurality of mutually adjacent fluid passage points (P′ P′ P′ P′n . . . P′x), said connecting apparatus having a main body (), which serves to control a fluid flow by means of at least one functional component (), such as a valve device; a plurality of further fluid passage points (P P P Pn . . . Px), which can be connected to each other in a fluid-conducting manner via the functional component () with assignable fluid passage points in the main component (); and at least one shut-off part, which shuts off the respective fluid passage point (P′ P′ P′n . . . P′x−1 in the main component () and/or in the main body, said fluid passage point remaining unaffected by the functional component (). Said connecting apparatus is characterised in that there is in each case a fluid-conducting connection line () inside the main body () between the further fluid passage points (P P P Pn . . . Px) and the functional component (), which fluid-conducting connection line can be shut off by a separate shut-off part, as long as the associated connection to the functional component () remains unused. 23032121632. The connection device according to claim 1 , characterized in that the connecting lines ( claim 1 , ) open outwardly from the main body () via the respective additional assignable fluid passage points P claim 1 , P claim 1 , P claim 1 , P. . . P claim 1 , and that the respective shut-off part () is insertable from the outside into the connecting line () claim 1 , preferably remaining there claim 1 , via the additional fluid passage points P claim 1 , P claim 1 , P claim 1 , P. . . P.316. The connection device according to claim 1 , characterized in that the respective shut-off part () is formed from a sealing plug claim 1 , preferably in the form of a ball expander.41210. The connection device according to claim 1 , characterized in ...

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Номер записи: 40
25-04-2019 дата публикации

VALVE APPARATUS FOR INFLUENCING A FLOW OF MEDIUM

Номер: US20190120260A1
Автор: BIWERSI Sascha Alexander
Принадлежит:

A valve apparatus for influencing a flow of medium between a supply port () and a pressure port (), having a valve device () which, in at least one closed position, blocks the connection between the supply port () and the pressure port () and which opens this connection in at least one opened position, in which the pressure port () is connected to at least one of two medium chambers () by a respective fluid channel (), of which one () consists of a fluid duct () in the valve slider (), is characterized in that the other fluid channel () has at least one further fluid duct () which is separate from the first fluid duct () and which, at least in one of the opened positions of the valve slider (), opens at one end () into the medium chamber () and which, in every displacement position of the valve slider (), is permanently connected at the other end () to the pressure port (). 1384010221860786280183840364628068642268706272481840223840828468922280944022. A valve device for influencing a media flow between a supply port () , to which a pressure supply source (P) can be connected , and a pressure port () , to which a hydraulic consumer (U) can be connected , having a valve device () , which has a valve spool () , which is guided in axial travel directions within a valve housing () and the opposite end faces ( , ) of which at least partially delimit two media chambers ( , ) within the valve housing () and which blocks the connection between the supply () and the pressure port () in at least one closed position and which releases that connection () in at least one of its open positions , in which the pressure port () is connected to at least one of two media chambers ( , ) via a relevant fluid guide () , one of which () is formed of a valve spool () located in the fluid duct () , one end () of which opens into a media chamber () and the other end () of which opens into a fluid chamber () in the valve housing () , which fluid chamber is separated from the pressure port () in ...

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Номер записи: 41
11-05-2017 дата публикации

DEVICE FOR CONTROLLING THE FLOW OF A FLUID WITH IN-BUILT PRESSURE THRESHOLD DETECTION

Номер: US20170130746A1
Автор: GOISQUE Boris Marie Frédéric, PEROTTO Stéphane Pascal, TAUPEAU Anthony Raymond Arthur
Принадлежит:

Valve with in-built pressure threshold detection, mounted in an engine block pipe, the valve comprising a body comprising an electrically insulating external element () and an electrically conducting internal element () bearing the obturator seat (), an obturator (), the valve also comprising an electrical terminal () connected to a detection system which, with the engine block () and the internal element (), forms an electric circuit, the internal element () being in permanent contact with the electrical terminal (), the internal element () sliding in the external element () such that, for a pressure below the threshold pressure, the internal element () is in electrical contact with the engine block, closing the electric circuit, and for a pressure equal to or greater than the threshold pressure, the internal element () is not in electrical contact with the engine block, breaking the electric circuit. 115-. (canceled)16. Device for controlling the flow of a fluid with in-built pressure threshold detection comprising flow interrupting and enabling means intended to be arranged in a pipe of a frame connecting a fluid source and an area to supply with fluid , said frame comprising at least one electrically conducting area , the flow interrupting and enabling means comprising a body bearing a first obturator seat , an obturator configured to cooperate in a leak tight manner with the first obturator seat , a first spring applying a return force on the obturator in the direction of the first obturator seat , said body comprising an internal element bearing the first obturator seat , said internal element being electrically conducting , said body also comprising an electrically insulating external element , which is electrically insulating , so as to be electrically insulated from at least the conducting area , the device also comprising an electrical connection intended to be connected to a detection system , said detection system forming , with at least the conducting ...

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Номер записи: 42
02-05-2019 дата публикации

Pressure-limiting unit for a pressure booster as well as a pressure booster for driving hydraulic tools

Номер: US20190128437A1
Автор: Heinz Enriquez, Martin Zurmühlen
Принадлежит: TKR Spezialwerkzeuge GmbH

A pressure-limiting unit for a pressure booster for driving hydraulic tools. The unit includes a pneumatic unit that is driven by gas or air pressure, a hydraulic unit connected to the pneumatic unit and having a hydraulic port for connecting the hydraulic tool to the hydraulic unit in a fluid-tight manner and a pressure-limiting valve for adjusting the hydraulic pressure. The unit includes a closing element pushed against a valve seat by a spring element and having a displaceable adjusting element for adjusting the spring force of the spring element. To provide a pressure-limiting unit and a pressure booster for driving hydraulic tools with a pressure-limiting unit, which offer the possibility of making a precise adjustment of the hydraulic pressure in a simple way, the pressure-limiting unit includes a position detection unit connected to the adjusting element to detect the axial position of the adjusting element, an evaluation unit for determining the set hydraulic pressure as a function of the axial position, and an output unit for displaying the set hydraulic pressure.

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Номер записи: 43
23-04-2020 дата публикации

FLOW RATE REGULATING VALVE AND FLUID CONTROL APPARATUS USING THE SAME

Номер: US20200124064A1
Автор: Dohi Ryousuke, KOBAYASHI Keigo, Nagao Masakazu, YAKUSHIJIN Tadayuki
Принадлежит:

To provide a flow rate regulating valve capable of detecting a state where a flow path is fully closed even when there is no lead wire or the like for detecting the state where the flow path is fully closed. A flow rate regulating valve is a fluid regulating valve including a valve body for opening and closing fluid flow paths provided in a body and includes an actuator unit for moving the valve body, and the actuator unit includes a drive motor, a slider moved by a rotation of the motor, a cylindrical body mounted on the slider, and a shaft interlocked with the cylindrical body and provided with the valve body fixed to a distal end thereof. The motor is a stepping servomotor, and has a pressing control function for moving the valve body in the closing direction at a continuous rated torque. 2. The flow rate regulating valve according to claim 1 , wherein the slider and the cylindrical body are unitized.3. The flow rate regulating valve according to claim 1 , wherein the motor further has a position control function for controlling a position by the closed loop based on the signal of the encoder claim 1 , and a speed control function for controlling the rotating speed of a rotary shaft of the motor claim 1 , andsetting of a predetermined opening is performed by the position control function and the speed control function.4. The flow rate regulating valve according to claim 1 , wherein torque abnormality of the motor is determined by the torque control function when detecting the closed position and when setting the predetermined opening.5. A fluid control apparatus comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a plurality of lines each having a flow rate regulating valve, an opening of which is set to a prescribed value, wherein each of the flow rate regulating valves of the plurality of lines corresponds to the flow rate regulating valve according to , and wherein an amount of operation of the motor of the each of the flow rate regulating valves is ...

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Номер записи: 44
23-04-2020 дата публикации

LOCALLY-ACTUATED PARTIAL STROKE TESTING SYSTEM

Номер: US20200124206A1
Автор: AlSahan Fawaz A.
Принадлежит: Saudi Arabian Oil Company

Embodiments of the present disclosure describe both mechanically-operated and electrically-operated, locally-actuated partial stroke testing devices and systems for testing operation of an emergency isolation valve. 1. A locally-actuated partial stroke testing device for testing a double acting emergency isolation valve , comprising:a mechanically-operated valve with a first vent port, a second vent port, a first working port, and a second working port, the first and second vent ports being operable to vent air from the mechanically-operated valve, and the first working port being coupled to a first flow control valve and the second working port being operable to regulate the air flow to a first solenoid valve coupled to the double acting emergency isolation valve;the first flow control valve operable to regulate the air flow to a second solenoid valve coupled to the double acting emergency isolation valve;a second flow control valve coupled to the first vent port of the mechanically-operated valve, the second flow control valve being operable to regulate air flow;an air supply line coupled to an input port of the mechanically-operated valve, the air supply line having an air filter regulator to filter and regulate air supplied to the input port;a 3/2 solenoid valve with a first port coupled via an first working line to a first working port of the mechanically-operated valve;a second working flow line coupled between a second port of the 3/2 solenoid valve and a first port of the double acting emergency isolation valve; anda valve position indicator to convey position of the double acting emergency isolation valve, the valve position indicator and the mechanically-operated valve being in visual proximity to a user.2. The device of claim 1 , wherein the mechanically-operated valve is a 3/2 manually-operated valve.3. The device of claim 1 , wherein the mechanically-operated valve is a 5/2 manually-operated valve.4. The device of claim 1 , wherein the first flow ...

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Номер записи: 45
25-05-2017 дата публикации

VALVE MODULAR SYSTEM

Номер: US20170146036A1
Автор: BOEHLER Andreas, PLOTKA Arkadiusz
Принадлежит:

A valve modular system, comprising individual block components ( to ), each of which has a plurality of emerging connection points on at least one part of the free end faces thereof, for the purpose of holding connection components, such as insert valves (), pressure balances, nozzle or screen inserts (), fluid lines, blind plugs (), pressure and temperature displays, hydraulic accumulators () and comparable fluid-influencing or fluid-evaluating or fluid-storing components, and which abut each other with the adjacent end faces () thereof in a longitudinal direction, in pairs, to form a longitudinal linkage and in this respect are connected at least partially to each other in a fluid-guiding manner, is characterised in that transversely to the longitudinal linkage at least one further block component () is placed on at least one of the other block components ( to ) to form a vertical linkage in a fluid-guiding manner. 11429354313159114549515914. The invention concerns a modular valve system comprised of individual block components ( to ) , each of which has a plurality of connection points that exit from at least one part of the free end faces thereof , for the purpose of accommodating attachment components such as insert valves ( , ) , pressure compensators , nozzle or orifice inserts () , fluid lines , blind plugs ( , ) , pressure and temperature gauges , hydraulic accumulators () and matchable fluid-influencing or fluid-evaluating or fluid-storing components , and which abut each other with their adjacent end faces () in pairs in a longitudinal direction to form a longitudinal chain , and in this respect are connected to each other at least partially in a fluid-conducting manner , characterised in that transverse to the longitudinal chain , at least one further block component ( , , , ) is placed , fluid-conducting , on top of at least one of the other block component ( to ) and thus forming a vertical chain.24549515914. Modular valve system according to claim 1 , ...

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Номер записи: 46
17-06-2021 дата публикации

Hydraulic system for working machine and control valve

Номер: US20210180618A1
Автор: Keigo HONDA, Yuji Fukuda
Принадлежит: Kubota Corp

A hydraulic system includes a hydraulic pump to output an operation fluid, first and second hydraulic devices to be operated by the operation fluid, first and second control valves to control the first and second hydraulic device, respectively, first and second communication tubes connecting the first hydraulic device to the first control valve, a supply fluid tube connecting the first control valve to the second control valve, the supply fluid tube being configured to supply the return fluid to the second control valve, first and second connection fluid tubes disposed on the first control valve, a discharge fluid tube connected to the first control valve, first and second branching fluid tubes branched from the first and second connection fluid tubes, respectively, first and second throttles disposed on the first and second branching fluid tubes, respectively, the second throttle being smaller than the first throttle.

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Номер записи: 47
01-06-2017 дата публикации

Hydraulic Valve

Номер: US20170152966A1
Автор: Jamie Philips, Reg RAVAL
Принадлежит: Claverham Ltd

An electrohydraulic spool valve, comprising: a spool, axially movable within a manifold; a position feedback system provided at a first end of the spool; and an end cap provided on said first end so as to form a first high pressure reservoir between the end cap and the first end of the spool. The end cap provided on the end of the spool partly defines the high pressure reservoir by containing the high pressure fluid in the vicinity of the spool end.

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Номер записи: 48
22-09-2022 дата публикации

Spool valve and hydraulic apparatus including the same

Номер: US20220299046A1
Автор: Minheuk KANG
Принадлежит: VOLVO CONSTRUCTION EQUIPMENT AB

A spool valve is provided. A valve housing has a pilot fluid passage, and a first portion and a second portion lengthwisely spaced apart from each other. A spool is movably inserted in the valve housing, and includes a plug able to enter the pilot fluid passage between the first portion and the second portion to change a flow area of the pilot fluid passage following movement of the spool. A hydraulic machine provides that when pilot fluid is supplied to the pilot fluid passage through the first portion, at least a portion of the supplied pilot fluid is provided to the holding valve through the second portion. The holding valve allows a flow of working fluid from the first chamber to the spool valve, and the spool moves to a third position to forward working fluid to the second chamber.

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Номер записи: 49
14-06-2018 дата публикации

VALVE, IN PARTICULAR PROPORTIONAL PRESSURE REGULATING VALVE

Номер: US20180163889A1
Автор: Bruck Peter, SCHNEIDER Gerd
Принадлежит: HYDAC FLUIDTECHNIK GMBH

A valve, in particular proportional pressure regulating valve, having a spring-loaded valve piston () which is guided in longitudinally displaceable fashion, in a manner actuated by an energizable actuating magnet (), within a valve housing () and which, in a manner dependent on the displacement position thereof, produces or shuts off again a fluid-conducting connection between a pump port (P) and a working port (A) and between said working port (A) and a tank port (T) in the valve housing, wherein those face sides of the valve piston () which are situated opposite one another are permanently acted on by the pressure of the tank port (T), and wherein the valve piston () has a regulation surface () which is active in terms of pressure and which is connectable in fluid-conducting fashion to the working port (A) for the generation of the regulation pressure (P), and having a ring-shaped chamber () in the valve housing (), into which ring-shaped chamber the working port (A) opens in a radial or axial direction, characterized in that, on the valve piston (), at the location of the transition between the ring-shaped chamber () and the opening-in point of the working port (A), the regulation surface () which is active in terms of pressure is designed such that, in the deenergized state of the actuating magnet (), a maximum regulation pressure (P) can be generated by virtue of a respective settled state between the force of a compression spring () of the spring-loaded valve piston () and the regulation pressure (P) prevailing at the regulation surface () of the valve piston () taking effect. 110141210104442104410421430104410. A valve , in particular a proportional pressure regulating valve , having a spring-loaded valve piston () which is guided in a longitudinally displaceable manner and in a manner actuated by an energizable actuating magnet () within a valve housing () and which , dependent on its displacement position , establishes or shuts off again a fluid-conducting ...

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Номер записи: 50
25-06-2015 дата публикации

Controlled three-way proportional valve unit

Номер: US20150177740A1
Автор: Daniel Haller, Jochen Schaible, Max Schrobenhauser
Принадлежит: HOERBIGER AUTOMATISIERUNGSTECHNIK HOLDING GMBH

The invention relates to a controlled three-way proportional valve unit comprising: a valve assembly with two individual valves; an actuating device actuating valves of the valve assembly; and a control unit acting upon the actuating device and having a control signal input, the valves of the valve assembly being designed as poppet valves arranged on opposite sides and having counter-rotatable valve spindles. The valve spindles are prestressed relative each other in opposite directions by a prestressing element such that, when the actuating unit is inactive, a first poppet valve is open and the second poppet valve is closed. The actuating device comprises an actuator common to both poppet valves, acts upon the two valve spindles and changes the position of the valve spindles counter to the effect of the prestressing element.

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Номер записи: 51
21-06-2018 дата публикации

BRAKE HYDRAULIC PRESSURE CONTROLLER AND METHOD FOR MANUFACTURING BRAKE HYDRAULIC PRESSURE CONTROLLER

Номер: US20180170333A1
Автор: Ogawa Takashi, Sagayama Kosaku
Принадлежит:

A purpose is to obtain a brake hydraulic pressure controller and a method for manufacturing a brake hydraulic pressure controller that realize suppression of manufacturing cost and downsizing of the brake hydraulic pressure controller and simplification of a manufacturing process. 1. A brake hydraulic pressure controller comprising:a base body formed with a channel configured to conduct a hydraulic fluid;plural hydraulic pressure regulating valves provided in the channel; andplural drive coils respectively provided in the plural hydraulic pressure regulating valves and driving the hydraulic pressure regulating valves, whereinone end section that forms one end side of each of the drive coils is adhered to an adhesion surface section that forms a contour of the base body via a first adhesive member.2. The brake hydraulic pressure controller according to comprising:a coil casing for accommodating the plural drive coils, whereina first surface section that forms a contour of the coil casing is adhered to the adhesive surface section of the base body via a second adhesive member.3. The brake hydraulic pressure controller according to claim 2 , wherein the first adhesive member and the second adhesive member are continuously formed.4. The brake hydraulic pressure controller according to wherein the first adhesive member and the second adhesive member are adhesive members of a same material.5. The brake hydraulic pressure controller according to claim 2 , whereinthe coil casing has a second surface section that is formed to oppose the first surface section,the drive coil has the other end section that forms the other end side of the drive coil, andthe second surface section of the coil casing is formed with a holding projection that is provided in a projected manner on the first surface section side and abuts against the other end sections of the drive coil.6. The brake hydraulic pressure controller according to claim 5 , wherein the holding projection is formed on a ...

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Номер записи: 52
21-06-2018 дата публикации

ENERGY RECOVERY SYSTEM AND METHOD FOR HYDRAULIC TOOL

Номер: US20180172039A1
Автор: Du Hongliu, ROBEY Joseph R.
Принадлежит: CATERPILLAR INC.

An energy recovery system includes cylinders that articulate a hydraulic tool in a pump mode to provide potential energy and in a motor mode to recover the potential energy. The energy recovery system includes a tank that stores a hydraulic fluid for the cylinders and an open circuit variable displacement pump that circulates the hydraulic fluid in the pump mode from the tank to the cylinders and in the motor mode from the cylinders to the tank. The open circuit variable displacement pump includes a swashplate articulable between a positive position and a negative position. In the positive position, the hydraulic fluid circulates in the pump mode and in the negative position the hydraulic fluid circulates in the motor mode. The open circuit variable displacement pump includes an actuator that articulates the swashplate and a bias system that maintains the swashplate in a positive position when the hydraulic fluid is not in circulation. 1. An energy recovery system for a hydraulic tool comprising:a control interface configured to receive inputs corresponding to a prescribed motion for the hydraulic tool; cylinders configured to receive and release a hydraulic fluid;', 'a tank configured to store the hydraulic fluid; and', 'a swashplate articulable between a positive position and a negative position, wherein', 'an open circuit variable displacement pump configured to circulate the hydraulic fluid from the tank to the cylinders in the pump mode and circulate the hydraulic fluid from the cylinders to the tank in the motor mode, the open circuit variable displacement pump including, 'in the positive position the hydraulic fluid circulates in the pump mode and in the negative position the hydraulic fluid circulates in the motor mode,', 'an actuator configured to articulate the swashplate; and', 'a bias system configured to maintain the swashplate in a positive position when the hydraulic fluid is not in circulation; and, 'a hydraulic circuit configured to articulate the ...

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Номер записи: 53
06-06-2019 дата публикации

Hydraulic fluid device

Номер: US20190170167A1
Автор: Tsukasa ODAKA
Принадлежит: SMC Corp

A hydraulic fluid cylinder is equipped with a cylinder tube, a piston unit, and a piston rod. The piston unit has a piston body provided with a gasket-mounting groove. A gasket member is mounted in the gasket mounting groove. The gasket member has a gasket body provided with a magnet-mounting groove exhibiting groove depth in the axial direction of the piston unit, and also has a magnet mounted in the magnet-mounting groove.

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Номер записи: 54
08-07-2021 дата публикации

Flow Control Valve with Load-Sense Signal Generation

Номер: US20210207725A1
Автор: Zähe Bernd
Принадлежит:

An example valve includes a first port fluidly coupled to a source of fluid, a second port fluidly coupled to an actuator, a third port fluidly coupled to a reservoir, and a fourth port configured to export a load-sense (LS) fluid signal. The valve can operate in: a neutral state, wherein fluid is allowed to flow from the second port to the third port, while the first port and the fourth port are blocked; a first actuated state, wherein fluid flow is throttled from the second port to the third port, while the first port and the fourth port remain blocked; or a second actuated state, wherein fluid flow from the second port to the third port is blocked, while fluid flow is allowed from the first port to the second port and from the second port to the fourth port. 1. A valve comprising:a plurality of ports comprising: (i) a first port configured to be fluidly coupled to a source of fluid, (ii) a second port configured to be fluidly coupled to an actuator, (iii) a third port configured to be fluidly coupled to a reservoir, and (iv) a fourth port configured to export a load-sense (LS) fluid signal from the valve;a main spool having (i) a distal end configured to be subjected to a first fluid force applied by fluid from the first port, and (ii) a proximal end; andat least one spring configured to apply a biasing force on the main spool, wherein the at least one spring is disposed in a spring chamber, wherein the proximal end of the main spool is configured to be subjected to a second fluid force applied by fluid in the spring chamber, such that an axial position of the main spool is determined by a force balance between the first fluid force, the second fluid force, and the biasing force,wherein the valve is configured to operate in one of three states: (i) a neutral state, wherein the main spool allows fluid flow from the second port to the third port, while the first port and the fourth port are blocked, (ii) a first actuated state, wherein the main spool moves to a ...

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Номер записи: 55
08-07-2021 дата публикации

REDUNDANT VEHICLE CONTROL SYSTEMS

Номер: US20210207735A1
Автор: Arguelles Oscar R., Chen-Zion Ori Dov, Stone William Ernest, Williams Mark
Принадлежит: WOODWARD, INC.

Embodiments of the disclosure include a redundant control system for a vehicle. The redundant control system includes first and second actuator pistons mechanically coupled to one another and disposed in respective first and second fluid chambers. The first and second actuator pistons are movable by first and second primary stages. One of the primary stages includes a bypass valve with a pilot valve actuatable in response to movement of the first actuator piston. 112.-. (canceled)13. A method of operating a redundant control system of a vehicle , the control system comprising one or more actuator housings and a plurality of actuator pistons coupled to the one or more actuator housings , each of the actuator pistons mechanically coupled to one another and a common output device , the method comprising: 'driving a first actuator piston of the plurality of actuator pistons to move relative to at least one of the one or more actuator housings with a first primary stage of a plurality of primary stages, the first primary stage functioning independent of any other primary stage; and', 'in a flight-operation mode of the control system,'} driving the first actuator piston to move relative to at least one of the one or more actuator housings with an auxiliary stage;', 'driving a bypass valve and a servo valve of a second primary stage to move in response to driving the first actuator piston to move; and', 'detecting movement of the bypass valve and the servo valve of the second primary stage., 'in a ground-operation mode of the control system,'}14. The method of claim 13 , further comprising claim 13 , in the flight-operation mode claim 13 , operating one or more other primary stages in a passive state.15. The method of claim 13 , wherein the first primary stage comprises a bypass valve claim 13 , and further comprising claim 13 , in the flight-operation mode claim 13 ,actuating the bypass valve of the first primary stage to an active state; andactuating the bypass valve of ...

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Номер записи: 56
30-06-2016 дата публикации

HYDRAULIC ENERGY RECOVERY SYSTEM

Номер: US20160186785A1
Автор: Erkkilä Mikko
Принадлежит:

The invention relates to a hydraulic energy recovery system () having an output drive unit (), which can be actuated by a drive unit (), and by which a hydraulic motor-pump unit () can be driven which, in at least one energy feed position, supplies an energy storage device () and/or working hydraulics () with fluid; and which, in a recuperation position, discharges fluid under pressure from the energy storage device () at least to the working hydraulics () and/or is used to actuate the output drive unit (). 1103203102202104204. A hydraulic energy recovery system having an output drive unit ( , ) , which may be actuated by a driver unit ( , ) , and by means of which a hydraulic motor pump unit ( , ) may be driven , which{'b': 106', '206', '107', '207, 'in at least one energy feed position, supplies an energy storage device (, ) and/or working hydraulics (, ) with fluid; and'}{'b': 106', '206', '107', '207', '103', '203, 'in a recuperation position, discharges fluid under pressure from the energy storage device (, ) to at least the working hydraulics (, ) and/or uses it to actuate the output drive unit (, ).'}2210203204210211207211213204. The energy recovery system according to claim 1 , characterized in that a hydraulic supply pump () may be driven by the output drive unit () parallel to the motor-pump unit () claim 1 , wherein the supply pump () claim 1 , on the output side () thereof claim 1 , supplies the working hydraulics () and is connected via this output side () to a supply connection () of the motor-pump unit ().3210207. The energy recovery system according to claim 2 , characterized in that the supply pump () is a load sensing pump claim 2 , which may be controlled by the working hydraulics ().4210204210204. The energy recovery system according to claim 2 , characterized in that in the case of a larger delivery volume of the supply pump () claim 2 , as compared to a displacement of the motor-pump unit () claim 2 , the higher output pressure of the supply ...

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Номер записи: 57
28-06-2018 дата публикации

HYDRAULIC SYSTEM FOR WORKING MACHINE

Номер: US20180179736A1
Автор: FUKUDA Yuji
Принадлежит: KUBOTA CORPORATION

A hydraulic system for a working machine includes a first hydraulic apparatus to be activated by the operation fluid, a second hydraulic apparatus being configured to be activated by the operation fluid, a first operation valve to control the operation fluid to be supplied to the first hydraulic apparatus, a second operation valve to control the operation fluid to be supplied to the second hydraulic apparatus, a first fluid tube connecting the first operation valve to the first hydraulic apparatus, a second fluid tube connecting the first operation valve to the second hydraulic apparatus, a third fluid tube connecting the first fluid tube to the second fluid tube, and an outputting fluid tube connected to any one of the first operation valve and the second operation valve and configured to output the operation fluid supplied from any one of the first fluid tube and the second fluid tube. 1. A hydraulic system for a working machine , comprising:a hydraulic pump to output an operation fluid;a first hydraulic apparatus to be activated by the operation fluid;a second hydraulic apparatus other than the first hydraulic apparatus, the second hydraulic apparatus being configured to be activated by the operation fluid;a first operation valve to control the operation fluid to be supplied to the first hydraulic apparatus;a second operation valve to control the operation fluid to be supplied to the second hydraulic apparatus;a first fluid tube connecting the first operation valve to the first hydraulic apparatus;a second fluid tube connecting the first operation valve to the second hydraulic apparatus;a third fluid tube connecting the first fluid tube to the second fluid tube; andan outputting fluid tube connected to any one of the first operation valve and the second operation valve and configured to output the operation fluid supplied from any one of the first fluid tube and the second fluid tube.2. The hydraulic system for the working machine according to claim 1 , ...

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Номер записи: 58
28-06-2018 дата публикации

CLOSED LOOP AND/OR OPEN LOOP CONTROL METHOD FOR AN ELECTROPNEUMATIC FIELD DEVICE

Номер: US20180180069A1
Автор: Wagner-Stuerz David
Принадлежит: Samson Aktiengesellschaft

In a closed loop control method for an electropneumatic field device, an electronic target value input of a command variable corresponding to a target value of a control center is received by the open loop and/or closed loop control electronics, an electronic output for a manipulating variable to pilot the electropneumatic converter is generated by the open loop and/or closed loop control electronics; and, in a predetermined operating condition of the field device, the manipulating variable is determined by a closed loop control algorithm based on the command variable and on another controlled variable different from an actual control member position measurement value. 1. A closed loop control method for an electropneumatic field device including a pneumatic actuating drive configured to operate a control member , an electropneumatic converter configured to generate a pneumatic manipulating variable signal for the pneumatic actuating drive , and open loop and/or closed loop control electronics , the method comprising:receiving, by the open loop and/or closed loop control electronics, an electronic target value input of a command variable corresponding to a target value of a control center;generating, by the open loop and/or closed loop control electronics, an electronic output for a manipulating variable to pilot the electropneumatic converter; andin a predetermined operating condition of the field device, determining the manipulating variable by a closed loop control algorithm based on the command variable and on another controlled variable different from an actual control member position measurement value.2. The closed loop control method according to claim 1 , wherein claim 1 , in the predetermined operating condition claim 1 , the manipulating variable is determined by the closed loop control algorithm based on the command variable claim 1 , and based on a controlled variable related to an actuating pressure claim 1 , a position measurement value regarding a ...

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Номер записи: 59
13-06-2019 дата публикации

SERVO VALVE

Номер: US20190178265A1
Автор: INOUE Kaname, Ishikawa Masayuki, Ito Satoru, SAKASHITA Junji, YAJIMA Hisashi
Принадлежит: SMC Corporation

A servo valve is provided with a first elastic portion, a second elastic portion, and a connecting portion. The first elastic portion extends in an X direction inside a valve body and has a first elastic force exerted on a movable element toward an X2 direction. The second elastic portion extends in the X direction inside the valve body and has a second elastic force exerted on the movable element toward an X1 direction. 1. A servo valve comprising a tubular body including a plurality of ports formed therein; a movable element disposed inside the body in an axial direction of the body; and a drive unit connected to the body in the axial direction and configured to slide the movable element in the axial direction to thereby switch connections of flow passages between the ports; the servo valve further comprising:a first elastic portion extending in the axial direction inside the body and having a first elastic force to press the movable element toward the drive unit side in the axial direction;a second elastic portion extending in the axial direction inside the body and having a second elastic force to press the movable element in a direction away from the drive unit along the axial direction; anda connecting portion connected to at least the second elastic portion inside the body, wherein at a neutral position of the movable element at which driving of the drive unit is stopped, the connecting portion abuts against a portion of the body that faces the drive unit and a portion of the movable element that faces the drive unit.2. The servo valve according to claim 1 , wherein:one end of the first elastic portion is fixed to the drive unit side of the movable element;one end of the second elastic portion is fixed to the drive unit side of the body; andanother end of the first elastic portion and another end of the second elastic portion are connected to the connecting portion.3. The servo valve according to claim 2 , wherein:the drive unit includes a tubular body ...

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Номер записи: 60
29-06-2017 дата публикации

Hydraulic drive system for operation table

Номер: US20170184136A1
Автор: Qiangquan DENG
Принадлежит: Nanjing Mindray Bio Medical Electronics Co Ltd

A hydraulic drive system includes an oil supply device, an oil return device and a hydraulic cylinder circuit component. The circuit component includes a hydraulic cylinder, a first and a second two-position two-way electromagnetic directional valves. The cylinder includes a first chamber and a second chamber that has a piston rod. A first port of the first valve connects with the first chamber and a first port of the second valve connects with the second chamber. When the oil supply device connects to a second port of the first valve and a second port of the second valve connects to the oil return device, the piston rod is extended outwards. When the oil supply device connects to the second port of the second valve and the second port of the first valve connects to the oil return device, the piston rod is retracted.

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Номер записи: 61
07-07-2016 дата публикации

Pressure retaining valve

Номер: US20160195114A1
Автор: Gerd Schneider, Markus Bill
Принадлежит: HYDAC FLUIDTECHNIK GMBH

A load-holding valve ( 1 ) having at least one main control piston ( 39 ) which is guided longitudinally displaceably in a single-piece or multiple-piece valve housing ( 29 ) and a non-return piston ( 43 ), wherein, in switching positions, in the form of a load-holding position a fluid-conducting connection between at least two connection points ( 37, 21 ) is shut off by means of the two pistons ( 39, 43 ), of which connection points ( 37, 21 ) one ( 37 ) serves to feed or discharge media and the other ( 21 ) leads to a hydraulic consumer, in the form of a load-raising position the two pistons ( 43 ) move relative to one another into a release position, in which the connection between the medium feed ( 37 ) and the consumer is established, and in the form of a load-reducing position the two pistons ( 39, 43 ) assume a predefinable spacing from one another in such a way that the connection between the medium discharge ( 37 ) and the consumer is established, is characterized in that there is a monitoring device ( 75 ) which determines the individual switching positions of said pistons ( 39, 43 ), in order to ensure reliable functioning of the load-holding valve ( 1 ).

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Номер записи: 62
23-07-2015 дата публикации

HYDRAULIC CONTROL VALVE FOR CONSTRUCTION MACHINERY

Номер: US20150204360A1
Автор: Ku Bon-Seuk
Принадлежит: VOLVO CONSTRUCTION EQUIPMENT AB

The present invention relates to a hydraulic control valve for construction machinery that is used to maintain secondary pilot pressure which is formed proportionally to the switching of a switching device so as to be equal to or below a setting pressure of a pilot pump. The hydraulic control valve of the present invention includes: a port of the pilot pump into which the pilot pressure flows; a tank port to which the pilot pressure is drained; a valve body at which a secondary pilot pressure port that selectively communicates with the port of the pilot pump and the tank port is formed; the switching device that is pivotally mounted on the valve body; a pilot control valve that is linked through pressurization of the switching device and has a spool which forms the secondary pilot pressure proportional to the amount of switching of the switching device by communicating the port of the pilot pump and the secondary pilot pressure port with each other during the switching; a valve spring that elastically supports the spool so as to communicate the secondary pilot pressure port and the tank port with each other; and a check poppet that is disposed in an openable and closable manner at a pilot passage whose inlet side communicates with the secondary pilot pressure port and whose outlet side communicates with the port of the pilot pump. 1. A hydraulic control valve for a construction machine , comprising:a valve body including a port Pi for a pilot pump, through which a pilot pressure is introduced, a tank port T through which the pilot pressure is drained, and a secondary pilot pressure port C configured to selectively fluidically communicate with the port Pi for the pilot pump or the tank port T;a shifting device rotatably mounted on the valve body;a rod configured to be shifted in cooperation with the shifting device when the shifting device is pressedly rotated ;a pilot control valve including a spool that configured to be shifted in response to the shifting of the ...

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Номер записи: 63
12-07-2018 дата публикации

Combination valve and bidirectional flow control valve using the same

Номер: US20180195627A1
Автор: Toru Takeuchi
Принадлежит: KYB Corp

A combination valve built in a main valve of a solenoid valve includes: a first communication passage having a first port and a second port; a second communication passage branching from the first communication passage and having a third port; a first valve body provided in the first communication passage and configured to permit only the flow of working oil from the first port to the third port; and a second valve body provided in the first communication passage and configured to permit only the flow of working oil from the first port to the second port. The first valve body is located upstream relative to the second valve body.

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Номер записи: 64
29-07-2021 дата публикации

HYDRAULIC BRAKING SYSTEM AND METHOD

Номер: US20210229644A1
Автор: Arsenault Tyler, Mastrocola Naison E.
Принадлежит:

A braking system including a brake actuator, a control valve, a control assembly, and at least one pressure sensor. The control valve is disposed to direct hydraulic fluid to the brake actuator at a rate corresponding to a magnitude of a control signal. The control assembly includes a mixed-mode control system. The at least one pressure sensor is configured to measure a pressure of the hydraulic fluid to the brake actuator. The control assembly is configured to determine a position of the brake actuator. The mixed-mode control system is configured to determine a position command and a pressure command. The mixed-mode control system is configured to adjust the magnitude of the control signal based on at least one of the position command and the pressure command so as to reposition the brake actuator from a first position to a second position. 1. A braking system comprising:a brake actuator;a control valve disposed to direct hydraulic fluid to the brake actuator at a rate corresponding to a magnitude of a control signal;at least one pressure sensor disposed between the control valve and the brake actuator and configured to measure a pressure of the hydraulic fluid supplied to the brake actuator; anda mixed-mode control system configured to determine a position of the brake actuator, the mixed-mode control system further configured to determine a position command and a pressure command based on the position of the brake actuator and the pressure, respectively, and to adjust the magnitude of the control signal based on both of the position command and the pressure command so as to reposition the brake actuator from a first position to a second position.2. The braking system of claim 1 , further comprising at least one flow detector configured to measure a flow rate of the hydraulic fluid supplied to the brake actuator.3. The braking system of claim 2 , wherein the position of the brake actuator is a flow-based position based on the flow rate of the hydraulic fluid ...

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Номер записи: 65
18-06-2020 дата публикации

Stick control system in construction machine

Номер: US20200190770A1
Автор: Hideki Nakajima
Принадлежит: CATERPILLAR SARL

To achieve the improvement of recovery efficiency from a rod end oil chamber to a head end oil chamber during extending operation of a stick cylinder, and at the same time, to prevent an operation speed of the stick cylinder from being impaired when recovery is impossible., as well as to achieve the reduction of the number of parts, in a construction machine equipped with a stick. It is configured such that a first region Y1 at which a discharge valve passage 14g is opened while being throttled and a second region Y2 at which the discharge valve passage 14g is wider opened than at the first region Y1 are provided, in an operating position of a stick control valve 14 during extending operation of the stick cylinder, and if recovery from the rod end oil chamber 9b to the head end oil chamber 9a during extending operation of the stick cylinder 9 is possible, the stick control valve 14 is caused to be positioned at the first region Y1, and if the recovery is impossible, positioned at the region Y2.

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Номер записи: 66
27-06-2019 дата публикации

Pneumatic control valve manifold

Номер: US20190195246A1
Автор: Jeffrey Simmonds, Matthew Neff, Michael Jamison
Принадлежит: MAC Valves Inc

A pneumatic control valve manifold assembly including a modular manifold segment with first and second valve receiving bores, inlet and exhaust cavities, and fluid passageways. The modular manifold segment has a mating face and a back-side face. The fluid passageways are arranged in fluid communication with the first and second valve receiving bores, are open to the modular manifold segment mating face, and have multiple configurations. The modular manifold segment mating face includes an abutment surface surrounding the fluid passageways that has a plurality of shapes depending upon the configuration of the fluid passageways. The modular manifold segment back-side face includes a plurality of sealing ribs arranged in a pattern that universally mates with each of the different shapes of the abutment surface such that multiple modular manifold segments with different fluid passageways can be stacked next to each other.

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Номер записи: 67
19-07-2018 дата публикации

HYDRAULIC DRIVE DEVICE AND METHOD FOR CONTROLLING THE SAME

Номер: US20180202467A1
Автор: Eguchi Toru, FUJIWARA Hideto, Kanei Naofumi, Nishida Yoshiharu
Принадлежит: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

Provided is a hydraulic drive device, wherein the hydraulic drive device is provided with: a cylinder (); a rod (); a piston (); a hydraulic pump (); a tank (); a valve () that can be switched between a positive state of connecting the hydraulic pump () and a head chamber () and connecting a rod chamber () and the tank (), and a negative state of connecting the hydraulic pump () and the rod chamber () and connecting the head chamber () and the tank (); and a confluence channel () at which, when the valve () is in the positive state, at least a portion of hydraulic oil going from the rod chamber () to the tank () is merged into hydraulic oil going from the hydraulic pump () to the head chamber (). 1. A hydraulic drive device , comprising:a cylinder;a rod expandable and contractible with respect to the cylinder;a piston which is connected to the rod and divides the cylinder internally into a rod chamber and a head chamber;a hydraulic pump which delivers a hydraulic oil to the cylinder;a tank which stores the hydraulic oil flown from the cylinder;a valve switchable between a positive state in which the hydraulic pump and the head chamber are connected to each other and the rod chamber and the tank are connected to each other and a negative state in which the hydraulic pump and the rod chamber are connected to each other and the head chamber and the tank are connected to each other;a merging flow passage which allows at least a portion of the hydraulic oil from the rod chamber toward the tank to be merged into the hydraulic oil from the hydraulic pump toward the head chamber when the valve is in the positive state; anda control unit which calculates an opening degree command value for determining an opening degree of the valve and transmits the opening degree command value to the valve,wherein the control unit includes:a determination portion which determines whether or not an inflow condition which indicates that the hydraulic oil flows into the head chamber through ...

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Номер записи: 68
05-08-2021 дата публикации

Valve device

Номер: US20210239139A1
Автор: Hiroaki Fujiwara, Hiroshi Itoh, Noboru Ito
Принадлежит: Kawasaki Jukogyo KK

A valve device that changes the direction of flow of a hydraulic fluid supplied to and discharged from a cylinder mechanism to actuate the cylinder mechanism, the valve device including: a control valve including a main spool axially movable between different positions; a lock valve including a plunger and a pressure chamber; and a selector valve including a selector spool operable in conjunction with the main spool to axially move between different positions, the selector spool being located adjacent to the main spool and having an axis crossing an axis of the main spool.

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Номер записи: 69
03-08-2017 дата публикации

Integrated Valve for a Legged Robot

Номер: US20170219106A1
Автор: Hansen Malik, Komsta Jan, Saunders John Aaron
Принадлежит:

An example valve includes: a sleeve having a plurality of sleeve openings; a first conduit configured to be in hydraulic communication with a first chamber, where a first pressure sensor is disposed in the first conduit and configured to measure a pressure level of fluid in the first chamber; a second conduit configured to be in hydraulic communication with a second chamber, where a second pressure sensor is disposed in the second conduit and configured to measure a pressure level of fluid in the second chamber; a spool rotatable within the sleeve, wherein the spool includes a plurality of spool openings respectively corresponding to the plurality of sleeve openings; a rotary actuator coupled to the spool and configured to rotate the spool within the sleeve in clockwise and counter-clockwise directions; and a controller configured to cause the spool to rotate to one of a plurality of rotary positions. 1. A rotary valve comprising:a sleeve having a plurality of sleeve openings, wherein the plurality of sleeve openings include at least: a first opening configured to communicate fluid to and from a high pressure fluid source, a second opening configured to communicate fluid to and from a low pressure fluid reservoir, a third opening configured to communicate fluid to and from a first chamber of a hydraulic actuator, and a fourth opening configured to communicate fluid to and from a second chamber of the hydraulic actuator;a first conduit configured to be in hydraulic communication with the first chamber, wherein a first pressure sensor is disposed in the first conduit and configured to measure a pressure level of fluid in the first chamber;a second conduit configured to be in hydraulic communication with the second chamber, wherein a second pressure sensor is disposed in the second conduit and configured to measure a pressure level of fluid in the second chamber;a spool rotatable within the sleeve, wherein the spool includes a plurality of spool openings respectively ...

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Номер записи: 70
02-07-2020 дата публикации

FLUID CONTROL DEVICE

Номер: US20200208656A1
Автор: HORIGUCHI Hiroshi, IMAI Kazuya, Yasuda Tadahiro
Принадлежит:

There is provided a fluid control device that enables accurate control of a fluid flowing through a flow path. This fluid control device includes a block body having an internal flow path, a resistor provided within the flow path, a first pressure sensor upstream of the resistor, a second pressure sensor downstream of the resistor, and fluid control valves that control the fluid based on detection values from the pressure sensors. The block body further has an internal housing portion forming a portion of the flow path and housing the resistor. Additionally, a downstream-side flow path downstream of the housing portion has a base end connected to a downstream-side area through which flows the fluid that has already passed through the resistor. Moreover, the second pressure sensor is connected to the downstream-side area or to a vicinity of the base end. 1. A fluid control device comprising:a block body having an internal flow path through which a fluid flows;a resistor that is provided within the flow path and through which the fluid passes;a first pressure sensor that detects a pressure on an upstream side of the resistor;a second pressure sensor that detects a pressure on a downstream side of the resistor; anda fluid control valve that controls the fluid based on detection values from the first pressure sensor and the second pressure sensor, whereinthe block body further comprises an internal housing portion that forms a portion of the flow path and that houses the resistor, anda downstream-side flow path which forms the downstream side of the flow path from the housing portion has a base end that is connected to a downstream-side area through which flows the fluid that has already passed through the resistor in the housing portion, andthe second pressure sensor is connected to the downstream-side area of the housing portion or to a vicinity of the base end of the downstream-side flow path.2. The fluid control device according to claim 1 , wherein the block body ...

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Номер записи: 71
12-08-2021 дата публикации

Electro-Hydraulic Servovalve Control with Input

Номер: US20210246915A1
Автор: Haack Bryan R., Kulkarni Sharwari
Принадлежит: WOODWARD, INC.

The subject matter of this specification can be embodied in, among other things, a controller apparatus that includes a digital controller configured to provide a digital position signal based on a setpoint and a differential analog feedback signal, and a converter circuit configured to provide a differential analog electrohydraulic servo valve position control signal based on the digital position signal, and provide the differential analog feedback signal based on the differential analog electrohydraulic servo valve position control signal. 1. A controller apparatus , comprising:a digital controller configured to provide a digital position signal based on a setpoint and a differential analog feedback signal; anda converter circuit configured to provide a differential analog electrohydraulic servo valve position control signal based on the digital position signal, and provide the differential analog feedback signal based on the differential analog electrohydraulic servo valve position control signal.2. The controller apparatus of claim 1 , wherein the digital controller is further configured receive an electrohydraulic servo valve spool position signal claim 1 , and the digital position signal is further based on the electrohydraulic servo valve spool position signal.3. The controller apparatus of claim 2 , wherein the electrohydraulic servo valve spool position signal is based on a linear position of a spool of an electrohydraulic servo valve.4. The controller apparatus of claim 2 , wherein the electrohydraulic servo valve spool position signal is a linear variable differential transformer signal.5. The controller apparatus of claim 1 , wherein the digital controller is further configured receive an output position signal claim 1 , and the digital position signal is further based on the output position signal.6. The controller apparatus of claim 5 , wherein the output position signal is based on a position of an actuator.7. The controller apparatus of claim 6 , ...

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Номер записи: 72
11-08-2016 дата публикации

Valve device and hydraulic system

Номер: US20160230780A1
Автор: Maxim Reichert, Wolfgang Schneider
Принадлежит: HYDAC Engineering AG

The invention relates to a valve device ( 200 ) comprising at least one tank pressure port ( 218 ), a first pressure port ( 212 ), a second pressure port ( 214 ), and a pressure shut-off valve ( 224 ), which is switched between the individual ports ( 212, 214, 218 ), and which has at least two valve components ( 226, 228 ). Upon reaching a predefinable pressure cut-off value, the first pressure port ( 212 ) can be connected to the tank pressure port ( 218 ) by means of the first valve component ( 226 ). In the event of the fluid pressure being higher at the second pressure port ( 214 ) than at the first pressure port ( 212 ), the second pressure port ( 214 ) can be separated from the first pressure port ( 212 ) by means of the second valve component ( 228 ). The invention is characterized in that both valve components ( 226, 228 ) are combined to form a tradable structural unit, and in that for this purpose, both valve components ( 226, 228 ) are integrated in a common valve housing ( 230 ), preferably making direct contact. The invention further relates to a hydraulic system having such a valve device.

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Номер записи: 73
19-08-2021 дата публикации

Hydraulic control system and method with electro-proportional pressure valve and integral check

Номер: US20210254638A1
Автор: Travis Schmidt, Valeriy Kazak
Принадлежит: Hydraforce Inc

A hydraulic control assembly includes means for holding pressure in a cylinder to inhibit boom or arm drop of a machine in the event that a hose between the cylinder and a main control valve (MCV) ruptures. The pressure holding means of the hydraulic control assembly include a hydraulic valve and a parts-in-body check assembly both configured for insertion into a valve cavity defined by a valve body. The hydraulic valve comprises a proportional piloted valve that controls pressure.

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Номер записи: 74
18-08-2016 дата публикации

Hydraulic driving device

Номер: US20160238043A1
Автор: Shinobu Naitou, Takuya Miyata
Принадлежит: KOMATSU LTD

A hydraulic driving device includes: a hydraulic motor configured to operate by flushing oil from a hydraulic pump through a high pressure oil passage and a low pressure oil passage; a low pressure selective valve configured to operate in accordance with differential pressure between the high pressure oil passage and the low pressure oil passage, and to discharge the oil in the low pressure oil passage inside a motor case; a tank oil passage configured to connect the inside of the motor case with an oil tank; and a choke throttle provided to the low pressure selective valve or to an oil passage lower than the low pressure selective valve.

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Номер записи: 75
16-07-2020 дата публикации

SYSTEMS AND METHODS FOR SELECTIVE ENABLEMENT OF HYDRAULIC OPERATION

Номер: US20200224681A1
Автор: HRODEY Kyle
Принадлежит:

A hydraulic system is provided. The hydraulic system includes a pump, a load sense conduit, a tank conduit, a function workport, and a function control valve. The hydraulic system further includes a function poppet valve arranged between the function workport and the function control valve and having a function poppet vent passage, and a system control valve arranged downstream of the function control valve. The system control valve is biased into a first position where fluid communication between the function poppet vent passage and the tank conduit is prevented and fluid communication between the load sense conduit and the tank conduit is provided. The system control valve is selectively movable to a second position where fluid communication between the function poppet vent passage and the tank conduit is allowed and fluid communication between the load sense conduit and the tank conduit is prevented. 1. A hydraulic system comprising:a pump;a load sense conduit;a tank conduit in fluid communication with a tank;a hydraulic function including a function workport;a function control valve configured to selectively provide fluid communication between the function workport and either the pump or the tank conduit;a function poppet valve arranged between the function workport and the function control valve and including a function poppet vent passage; anda system control valve arranged downstream of the function control valve, wherein the system control valve is biased into a first position where fluid communication between the function poppet vent passage and the tank conduit is prevented and fluid communication between the load sense conduit and the tank conduit is provided, and wherein the system control valve is selectively movable to a second position where fluid communication between the function poppet vent passage and the tank conduit is allowed and fluid communication between the load sense conduit and the tank conduit is prevented.2. The hydraulic system of ...

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Номер записи: 76
26-08-2021 дата публикации

PNEUMATIC VALVE POSITIONER WITH FEEDBACK CONTROLLED FLOW BOOSTER

Номер: US20210262582A1
Автор: Beatty Kenneth L., Forman Douglas G., Haines Bradford B., Nelson Michael P., Price Mitchell L., Woolf Darin Kent, Yost Michael P.
Принадлежит: FLOWSERVE MANAGEMENT COMPANY

A pneumatically controlled flow booster includes a booster valve plug position sensor that enables control of the flow booster in a feedback loop, for example by a pneumatic valve positioner, thereby providing accurate, high speed, high flow control of both small and large actuator adjustments. Embodiments can accurately control a surge suppression valve over extended valve adjustment ranges and can fully open a surge suppression valve during a trip. The flow booster valve can include a spool and sleeve valve and/or a poppet valve. Embodiments provide bimodal flow boosting, whereby the output flow is less dependent on the valve plug position in a first position range, and more strongly dependent on the valve plug position in a second range. 1. A flow booster valve comprising:a first pneumatic control inlet configured to receive a first pneumatic control gas having a first pneumatic control pressure;a booster valve plug having a variable position within the flow booster valve, wherein a first longitudinal force is applied to the booster valve plug that is proportional to the first pneumatic control pressure;a first flow inlet in gas communication with a first flow outlet, a first gas flow from the first flow inlet to the first flow outlet being variable according to the position of the booster valve plug within the flow booster valve; anda valve plug position sensor configured to provide a sensor output that is indicative of the position of the booster valve plug within the booster valve.2. The flow booster valve of claim 1 , wherein a plug range over which the position of the booster valve plug is variable within the flow booster valve comprises a first position subrange and a second position subrange claim 1 , and wherein the first primary gas flow is more strongly dependent on the position of the booster valve plug when the booster valve plug is within the second position subrange as compared to when the booster valve plug is within the first position subrange.3. ...

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Номер записи: 77
25-08-2016 дата публикации

HYDRAULIC CONTROL APPARATUS

Номер: US20160245400A1
Автор: KOBAYASHI Shogo, Mukai Tomoaki, YOSHIDA Shunsuke
Принадлежит: HONDA MOTOR CO., LTD.

A check valve includes a check valve body and a check valve member. The check valve body includes a check valve outlet port and a check valve oil path. The check valve member is movable in the check valve oil path to move in a first direction in which the check valve member is pushed by hydraulic fluid due to hydraulic pressure from a hydraulic pump. A switching valve includes a switching valve body. The switching valve body includes a switching valve inlet port connected to the check valve outlet port and a receiving surface facing the check valve outlet port. The check valve member contacts the receiving surface after the hydraulic pump starts providing hydraulic pressure. The switching valve body is supported by a valve body via a first O-ring and a second O-ring such that the switching valve body is movable in the first direction. 1. A hydraulic control apparatus for an automatic transmission comprising:an engine on which idle-stop control is performed in a predetermined running state;a hydraulic pump that is driven by the engine;an accumulator that stores hydraulic pressure that is to be applied to a hydraulic actuator for the automatic transmission connected to the engine;a first oil passage through which hydraulic pressure from the hydraulic pump is applied to the accumulator;a check valve that is placed in the first oil passage and opened only in a direction in which the hydraulic pressure from the hydraulic pump is applied to the accumulator;a switching valve that is placed between the check valve and the accumulator in the first oil passage and allows the hydraulic pressure from the accumulator to be applied to a second oil passage connected to the hydraulic actuator; anda valve body in which at least the accumulator, the check valve, and the switching valve are accommodated,wherein the switching valve and the check valve are placed such that an axis of a sleeve of the switching valve is perpendicular to an axis of a sleeve of the check valve,wherein the ...

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Номер записи: 78
24-08-2017 дата публикации

Jet Pipe Arrangement For A Servo Valve

Номер: US20170241449A1
Автор: WIKTORKO Lukasz
Принадлежит:

A jet pipe arrangement for a servo valve, the jet pipe arrangement including a jet pipe, at least two receivers in operable communication with the jet pipe. The jet pip arrangement further includes an electromagnet in direct magnetic communication with the jet pipe such that, in use, the jet pipe is movable in response to changes in a magnetic field created by the electromagnet to distribute flow from the jet pipe asymmetrically between the at least two receivers. 1. A jet pipe arrangement for a servo valve , said jet pipe arrangement comprising:a jet pipe;at least two receivers in operable communication with the jet pipe; andan electromagnet in direct magnetic communication with the jet pipe such that, in use, the jet pipe is movable in response to changes in a magnetic field created by the electromagnet to distribute flow from the jet pipe asymmetrically between the at least two receivers.2. The jet pipe arrangement of claim 1 , wherein the jet pipe arrangement has no armature.3. The jet pipe arrangement of claim 1 , wherein the electromagnet is in direct magnetic communication with a first end of the jet pipe.4. The jet pipe arrangement of claim 1 , wherein the electromagnet is in direct magnetic communication with a second end of the jet pipe.5. The jet pipe arrangement of claim 1 , wherein the electromagnet is in direct communication with a section between a first end and a second end of the jet pipe.6. The jet pipe arrangement of claim 1 , wherein the jet pipe has a coating on its outer surface claim 1 , wherein the coating has magnetic properties.7. The jet pipe arrangement of claim 6 , wherein the coating is iron oxide nanoparticles.8. The jet pipe arrangement of claim 1 , wherein the jet pipe includes neodymium magnets positioned on its outer surface.9. A servo valve claim 1 , said servo valve comprising:the jet pipe arrangement of any preceding claim;a spool located between a first chamber and a second chamber, wherein the spool is movable between the ...

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Номер записи: 79
08-08-2019 дата публикации

Integrated Valve for a Legged Robot

Номер: US20190242482A1
Автор: Hansen Malik, Komsta Jan, Saunders John Aaron
Принадлежит: Boston Dynamics, Inc.

An example valve includes: a sleeve having a plurality of sleeve openings; a first conduit configured to be in hydraulic communication with a first chamber, where a first pressure sensor is disposed in the first conduit and configured to measure a pressure level of fluid in the first chamber; a second conduit configured to be in hydraulic communication with a second chamber, where a second pressure sensor is disposed in the second conduit and configured to measure a pressure level of fluid in the second chamber; a spool rotatable within the sleeve, wherein the spool includes a plurality of spool openings respectively corresponding to the plurality of sleeve openings; a rotary actuator coupled to the spool and configured to rotate the spool within the sleeve in clockwise and counter-clockwise directions; and a controller configured to cause the spool to rotate to one of a plurality of rotary positions. 1. A robot comprising:at least one movable member;a hydraulic actuator coupled to the movable member and configured to control motion of the movable member; and a sleeve having a plurality of sleeve openings, wherein the plurality of sleeve openings include at least a first opening configured to communicate fluid to and from a high pressure fluid source, a second opening configured to communicate fluid to and from a low pressure fluid reservoir, a third opening configured to communicate fluid to and from a first chamber of the hydraulic actuator, and a fourth opening configured to communicate fluid to and from a second chamber of the hydraulic actuator;', 'a first conduit configured to be in hydraulic communication with the first chamber, wherein a first pressure sensor is disposed in the first conduit and configured to measure a pressure level of fluid in the first chamber;', 'a second conduit configured to be in hydraulic communication with the second chamber, wherein a second pressure sensor is disposed in the second conduit and configured to measure a pressure ...

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Номер записи: 80
27-11-2014 дата публикации

FLUID VALVE ARRANGEMENT COMPRISING A BISTABLE FLUID VALVE

Номер: US20140345267A1
Автор: Rammer Raphael, Storm Stefan
Принадлежит:

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 pressure pulse generator being provided for valve switchover in the feed line for switching over a feed line and a return line between two flow lines, and the fluid valve comprising a reversing unit which has two chambers which are separated from one another by a bistable surface element, the two chambers being connected to the two flow lines and the bistable surface element being operatively coupled to the valve body in order to actuate it. As a result, a bistable fluid valve is provided which can be reversed by way of pressure pulses or pressure flanks and otherwise has no energy requirement. 1. Fluid valve arrangement having a bistable fluid valve for two fluid lines with a valve body which can be moved into two positions for two switching states , characterized in that a pressure pulse generator is provided for valve switchover in the feed line for switching over a fluid feed line and a fluid return line between two flow lines , and the fluid valve comprises a reversing unit which has two chambers which are separated from one another by a bistable surface element , the two chambers being connected to the two flow lines and the bistable surface element being operatively coupled to the valve body in order to actuate it.2. 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 , characterized in that the fluid valve comprises a reversing unit which has two chambers which are separated from one another by a bistable surface element , one of the chambers communicating directly with the fluid line , whereas the other chamber is connected via a pressure changing member to the fluid line and the bistable surface element is operatively coupled to the valve body in order to ...

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Номер записи: 81
07-09-2017 дата публикации

A three-position booster valve mechanism having a piston-cylinder control system which connects centrally in between supply and exhaust valves to an operating member

Номер: US20170254424A1
Автор: Henk Bakker
Принадлежит: Asco Controls Bv

A three-position booster valve mechanism includes an operating member for moving a supply and exhaust valve. A piston-cylinder control system is provided for moving the operating member between a first position in which the supply and exhaust valve are closed, a second position in which the supply valve is open and the exhaust valve is closed, and a third position in which the supply valve is closed and the exhaust valve is open. A pilot port is provided for moving the operating member in between the first, second and third positions in dependence of a pilot pressure. The piston-cylinder control system connects to the operating member at a central point of application in between the supply and exhaust valve. The operating member extends in opposing directions from the central point of application towards the supply and exhaust valve.

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Номер записи: 82
15-08-2019 дата публикации

DISCHARGE PRESSURE SCALE AND LIFTING-LOWERING DEVICE HAVING A DISCHARGE PRESSURE SCALE OF THIS TYPE

Номер: US20190249693A1
Автор: Bill Markus, HESS Maximilian Felix, HILZENDEGEN Philipp
Принадлежит:

The invention relates to a discharge pressure scale () consisting of at least one valve housing () having at least three fluid connection points in the form of a functional connector (A), a return flow connector (T) and a control connector (), wherein a valve piston () is guided such that it moves longitudinally against the effect of an energy accumulator (), moving from a respective opening or regulating position, against a valve seat (), into a closed position, wherein the control () and return flow connectors (T) are separated from one another, characterised in that the fluid pressure present at the control connector () can be guided onto a pressure-active surface (A*) of the valve piston () by means of a pressure compensation device () in such a way that it moves into its respective opening or regulating position in a pressure-compensated manner due to the force of the energy accumulator (). 130412852429428281527042. A discharge pressure maintenance-type component () , consisting of at least one valve housing () having at least three fluid connection ports in the form of a user port (A) , a return port (T) and a control port () , in which a valve piston () longitudinally movably guided against the action of an energy storage device () , travels , starting from an individual opening or control position , against a valve seat () into a closed position , in which the control port () and the return port (T) are separated from each other , characterized in that the fluid pressure existing at the control port () is routed to a pressure-effective surface (A*) of the valve piston () by means of a pressure compensation device () such that the former reaches its respective opening or control positions in a pressure-balanced manner solely due to the force of the energy storage device ().2949241524196. The discharge pressure maintenance-type component according to claim 1 , characterized in that the valve seat () having an inclined seat () on the valve housing () forms a ...

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Номер записи: 83
29-08-2019 дата публикации

MULTI-WAY VALVE AS WELL AS ACTUATOR COMPRISING SUCH A MULTI-WAY VALVE

Номер: US20190264586A1
Автор: CARLSON Urban, Höglund Anders
Принадлежит:

A multi-way valve includes a control pressure channel, first and second control fluid channels, a valve body in the first and second control fluid channels, and an electrically controlled device having a drive member and an armature. The armature moves back and forth by the drive member between inactive and active positions. Movement of the armature from the inactive to the active position displaces the valve body arrangement to an active position, closing the first and opening the second control fluid channel is open. The electrically controlled device includes a drive body connected to the armature and a first spring member between the armature and the drive body. The valve body arrangement is biased towards the inactive position by a second spring member. The armature in the inactive position is biased towards the active position by a third spring member. Also disclosed is an actuator including the valve. 116-. (canceled)18208. The multi-way valve according to claim 17 , wherein the third spring member () is preloaded when the armature () is located in the active position.1920. The multi-way valve according to claim 17 , wherein the third spring member () is a conical helical spring.201720. The multi-way valve according to claim 17 , wherein the second spring member () exerts a greater spring force than the third spring member ().211917. The multi-way valve according to claim 17 , wherein the first spring member () exerts a greater spring force than the second spring member ().2211981012119108aaaaaa. The multi-way valve according to claim 17 , wherein an internal rubber damper () is arranged at the interface between an internal brim () of the armature () and an internal stop surface () arranged in the first control fluid channel () claim 17 , wherein said internal rubber damper () is compressed between the internal brim () and the internal stop surface () when the armature () is in the active position.231198106119108bbbbbb. The multi-way valve according to claim ...

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Номер записи: 84
05-10-2017 дата публикации

Construction machine

Номер: US20170284064A1
Автор: Kiwamu Takahashi, Kouji Ishikawa, Masatoshi Hoshino, Seiji Hijikata, Yasutaka Tsuruga
Принадлежит: HITACHI CONSTRUCTION MACHINERY CO LTD

The construction machine includes: a control valve that switchingly supplies hydraulic fluid from a hydraulic pump to a hydraulic actuator; a control valve drive device that supplies pilot secondary hydraulic fluid to the control valve in accordance with an operation of an operation lever device; a pilot hydraulic pump that supplies pilot primary hydraulic fluid to the control valve drive device; a pressure accumulation device that recovers return hydraulic fluid returned from the hydraulic actuator. The construction machine further includes: a check valve provided in a line between the pilot hydraulic pump and the control valve drive device; a pressure reducing valve that supplied the hydraulic fluid accumulated in the pressure accumulation device; a flow rate reduction device; and a controller that controls the flow rate reduction device in accordance with the pressure in the line between the check valve and the control valve drive device.

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Номер записи: 85
04-10-2018 дата публикации

Pneumatic valve arrangement

Номер: US20180283409A1
Автор: Stefan Kolbenschlag
Принадлежит: SAMSON AG

A pneumatic valve arrangement for a pneumatically operated field device, such as a control device, of a processing plant, such as a chemical plant, a foodstuff processing plant, a power plant or the like is disclosed. The valve arrangement may include an air supply conduit for receiving pressurized air from a source of pressurized air, a control air conduit for aerating and venting a pneumatic actor of the field device, and a venting conduit for discharging pressurized air to a pressure sink, such as the atmosphere; a venting valve for opening and/or closing the venting conduit and an aerating valve for opening and/or closing the air supply conduit; and a pivotable carrier lever for common actuation of the aerating valve and of the venting valve, wherein the carrier lever holds the venting valve in its closed position while it opens the aerating valve from its closed position.

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Номер записи: 86
20-10-2016 дата публикации

Double-loop control system with single hydraulic motor

Номер: US20160305455A1
Автор: Gao Youshan, Hao Huimin, Huang Jiahai, Quan Long, Yang Jing
Принадлежит:

A double-loop control system with a single hydraulic motor relates to a technical field of hydraulic transmission control, including a hydraulic motor (), a positive control loop (), a negative control loop (), a hydraulic pump (), an accumulator (), and an oil tank, wherein the hydraulic motor () adopts a unique thrust structure with four inlet/outlet ports; the positive control loop () and the negative control loop () independently control the hydraulic motor (), wherein the positive control loop () and the negative control loop () drive together or only one drives; or braking kinetic energy and potential energy of loads are stored in the accumulator () for energy recovery. The present invention uses only one hydraulic motor for satisfying different work conditions and different load driving requirements with advantages such as simple structure, high system reliability and high energy efficiency. 1123451. A double-loop control system with a single hydraulic motor , comprising: a hydraulic motor () , a positive control loop () , a negative control loop () , a hydraulic pump () , an accumulator () , and an oil tank (T) , wherein a first oil port (A) , a second oil port (B) , a third oil port (C) , and a fourth oil door (D) are provided on the hydraulic motor ();{'b': 2', '2', '1', '2', '1', '4', '4', '2', '4, 'wherein the positive control loop () comprises a first working oil port (E) and a second working oil port (F), which respectively suctions oil through a positive control loop inlet port (E′) and returns the oil through a positive control loop outlet port (F′); the first working oil port (E) of the positive control loop () connects with the first oil port (A) of the hydraulic motor (), the second working oil port (F) of the positive control loop () connects with the second oil port (B) of the hydraulic motor (), the positive control loop inlet port (E′) connects with an outlet port of the hydraulic pump (), and the positive control loop outlet port (F′) ...

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Номер записи: 87
10-09-2020 дата публикации

INDUSTRIAL APPARATUS COMPRISING A PNEUMATIC CONTROL VALVE

Номер: US20200284272A1
Автор: Abraham Lionel
Принадлежит:

This industrial apparatus () comprises a pneumatic system (), a first mechanical device () and a second mechanical device (). The pneumatic system () includes: a first pneumatic actuator () for commanding the first mechanical device (), a second pneumatic actuator () for commanding the second mechanical device (), a pneumatic control valve () switchable between several states to command of the first and second actuators (). The control valve () comprises an actuation portion (), movable in translation between: a resting position, corresponding to a first state (), a first pushed position, corresponding to a second state (S), and a second pushed position, corresponding to a third state (S). The first pushed position corresponds to an intermediary position between the resting position and the second pushed position. 1. An industrial apparatus comprising a pneumatic system , a first mechanical device and a second mechanical device , the pneumatic system including:a first pneumatic actuator configured to command the first mechanical device; a second pneumatic actuator configured to command the second mechanical device; anda pneumatic control valve switchable between several states to command the first and second pneumatic actuators;wherein the pneumatic control valve comprises an actuation portion, movable in translation between:a resting position, corresponding to a first state;a first pushed position, corresponding to a second state; anda second pushed position, corresponding to a third state; and wherein the first pushed position corresponds to an intermediary position between the resting position and the second pushed position.2. The industrial apparatus of claim 1 , wherein the pneumatic control valve is adapted to selectively activate or inactivate the first and second pneumatic actuators depending on the selected state claim 1 , respectively claim 1 , by connecting at least one of the first or second pneumatic actuators with a compressed gas source of the ...

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Номер записи: 88
18-10-2018 дата публикации

Contamination Resistant Poppet Valve

Номер: US20180299019A1
Автор: Adam Virkler, Brent Dietrich, Daniel John Nosek, John Foundoulis, Terry Bailey, Troy Gilchrist Wojick
Принадлежит: GE Energy Control Solutions LLC

A multi-way poppet valve and methods for using the same are provided. In one embodiment, the poppet valve includes a manifold and a poppet assembly including an inner poppet and an outer poppet defining one or more lands. The poppet assembly can dimensioned for receipt within a bore of the manifold and configured to move longitudinally within the manifold. The inner poppet and the outer poppet can also be formed in two separate pieces that are capable of moving with respect to one another. This design can allow the lands of the poppet assembly to form fluid-tight seals (e.g., metal-metal, metal-gasket, etc.) with the manifold. In this manner, the poppet valve can move longitudinally between open and closed positions where the fluid-tight seals respectively allow or inhibit fluid flow between selected ports of the valve.

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Номер записи: 89
18-10-2018 дата публикации

VALVE, IN PARTICULAR A 4/2-WAY SLIDE VALVE

Номер: US20180299025A1
Автор: Bruck Peter, GRILL Martin, HILZENDEGEN Philipp
Принадлежит:

The invention relates to a valve, in particular a 4/2-way slide valve (), comprising a valve piston (), which is guided in a longitudinally movable manner in a valve housing (), for selectively connecting and disconnecting fluid connections in the valve housing (), such as a pressure supply connection (P), a tank connection (T), and two utility connections (A, B), and comprising a magnetic system (), to which current can be supplied, for controlling the valve piston (), characterized in that, when no current is supplied to the magnetic system (), the control pressure at one of the utility connections (A, B) can be set, in particular limited, by means of a control device () arranged in the valve housing. 1606725254967496270798088. A valve , in particular a 4/2-way-way slide valve () , having a longitudinally movable , guided valve piston () in a valve housing () for selectively connecting and disconnecting fluid ports in the valve housing () , such as a pressure-supply port (P) , a reservoir port (T) and two utility ports (A , B) and having an energizable magnet system () for actuating the valve piston () , characterized in that in the de-energized state of the magnet system () a control device ( , , , , ) arranged in the valve housing can be used to set , in particular limit , the control pressure at one of the utility ports (A , B).2806270676773. The valve according to claim 1 , characterized in that the control device passes the fluid pressure present on one utility port (B) on to a control pressure chamber () for the purpose of actuating a pressure-detecting piston ( claim 1 , ) claim 1 , in operative connection with the valve piston () claim 1 , permitting traversing movements of the valve piston () to control the fluid flow between the pressure-supply port (P) and this one utility port (B) against the action of an energy storage means claim 1 , such as a compression spring ().3627069256267717249. The valve according to claim 1 , characterized in that the ...

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Номер записи: 90
17-09-2020 дата публикации

Method to automatically detect parameter for pressure dynamics control

Номер: US20200291970A1
Автор: Meng Wang, Michael Berne Rannow
Принадлежит: Eaton Intelligent Power Ltd

Systems and methods for auto-commissioning first and second valve assemblies associated with an actuator in an electro-hydraulic system are disclosed. In one method, a controller performs an automatic test protocol to determine a bulk modulus over fluid volume parameter used by the controller to control the valve assemblies. In one aspect, the test protocol can include pressurizing each side of the actuator to two different pressures with one of the first and second valve assemblies and blocking the other side of the actuator with the other of the first and second valve assemblies. The bulk modulus over fluid volume parameter for each valve assembly can be calculated based on recorded fluid pressures at the actuator and consumed flow at the first and second valve assemblies.

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Номер записи: 91
17-09-2020 дата публикации

Spool valve device and spool valve

Номер: US20200292100A1
Автор: Hideki Tanaka, Keita Morikawa, Kenjirou HARA, Masahiro Yamada, Yukito Imamura
Принадлежит: Kawasaki Jukogyo KK

A spool valve device includes: a housing with channels; a spool moving to change channel connection statuses; an electric actuator including an electric motor and linear-motion conversion mechanism, the motor rotating an output shaft by torque corresponding to a drive current supplied to the motor, the mechanism converting rotational output shaft movement into straight movement and applying thrust corresponding to the torque to the spool to change position; a biasing member applying biasing force to the spool against the actuator thrust; an angle detector detecting an motor output shaft angular position; a driving portion driving the motor by controlling drive current flow supplied to the motor based on a position command input and the angular position detected by the angle detector; and an abnormality determining portion calculating the spool position based on the detected angular position and determine presence or absence of operation spool abnormality.

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Номер записи: 92
26-10-2017 дата публикации

ENERGY SAVING DIRECTIONAL-CONTROL VALVES FOR PROVIDING INPUT-OUTPUT COMPATIBILITY WITH STANDARD NON-ENERGY SAVING DIRECTIONAL-CONTROL VALVES

Номер: US20170306990A1
Автор: Goldfarb Michael
Принадлежит: Nexmatix LLC

An energy saving directional-control valves (2-position and 3-position) are configured with standard manual override functionality and with the same steady-state input-output behavior as each respective standard/non-energy saving directional-control valve. This allows a standard non-energy saving valve to be replaced with an energy saving valve without reconfiguring the external electrical and manual override command logic. 1. A pilot-operated directional-control valve comprising:a valve body;at least four fluid ports;a valve spool;a first pilot cylinder;a second pilot cylinder;a first biasing member;a second biasing member;a normally-depressurized pilot solenoid valve;a normally-pressurized pilot solenoid valve, wherein:the at least four fluid ports, valve spool, the first pilot cylinder and the second pilot cylinder are disposed within the valve body;the valve spool is moved to a first position when the first pilot cylinder is pressurized and the second pilot cylinder is de-pressurized;the valve spool is moved to a second position when the second pilot cylinder is pressurized and the first pilot cylinder is de-pressurized;the valve spool is moved to a third position by the first and second biasing members when the first and second pilot cylinders are de-pressurized;the normally-depressurized pilot solenoid controls pressure to the first pilot cylinder;the normally-pressurized pilot solenoid controls the pressure to the second pilot cylinder; andthe first pilot cylinder has a first diameter and the second pilot cylinder has a second diameter and second diameter is smaller than the first diameter.2. The pilot-operated directional-control valve of wherein the second diameter is at least 5 percent smaller than the first diameter.3. The pilot-operated directional-control valve of wherein the second diameter is at least 10 percent smaller than the first diameter.4. The pilot-operated directional-control valve of wherein the second diameter is at least 20 percent smaller ...

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Номер записи: 93
19-11-2015 дата публикации

Line pressure valve to selectively control distribution of pressurized fluid

Номер: US20150330519A1
Автор: Adam C. Maurer, Darren Firth, Jerry J. Brittan, Melissa M. Koenig, Robert J. Kanda
Принадлежит: Eaton Corp

A line pressure valve includes a valve housing having a central cavity and a plurality of inlet and outlet ports, and a spool positioned within the central cavity and axially displaceable therein, the spool having a plurality of radial cutouts that fluidly connect respective inlet and outlet ports based on an axial position of the spool with respect to the valve housing. First and second pumps are fluidly connectable and disconnectable respectively to and from the fluid circuit based on the axial position of the spool via the inlet and outlet ports.

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Номер записи: 94
10-10-2019 дата публикации

Hydraulic switch

Номер: US20190309867A1
Автор: Vincent Edwards
Принадлежит: Individual

The present invention relates to a hydraulic switch arrangement and a fluid switch for incorporating into a hydraulic switch arrangement that may be included in a hydraulic circuit for inhibiting flow of hydraulic fluid through a hydraulic circuit in the event of movement of an apparatus or platform from a stable to an unstable condition. Such platforms or apparatus may include for example, cranes, excavators, teletrucks and forklift trucks and roll over incidents of such machinery is common leading to numerous fatalities. Aspects of the present invention ensure fast switching in the event of a transfer from a stable to an unstable condition.

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Номер записи: 95
01-10-2020 дата публикации

Pilot Device for a Directional Valve without Internal Cable Connections

Номер: US20200309162A1
Автор: Beck Matthias, Dissoubray Carl, Hegedus-Fuchs Gergely Laszlo, Keyl Christoph, Knapper Steffen, Nemes Benjamin, Pozsega Peter, Reibert Jan-Peter
Принадлежит:

A pilot device for a hydraulic directional valve includes a displacement sensor, a pilot valve, an actuating device, a coil assembly, and a circuit board. The displacement sensor has a sensor axis and the pilot valve has a valve axis. The valve axis and the sensor axis are arranged substantially parallel to one another so as to lie in a reference plane. The actuating device and the coil assembly are arranged adjacent to one another. The circuit board is arranged parallel to the reference plane. In each case, to establish an electrical contact, the coil assembly, the actuating device, and an electrical plug connection are either soldered directly to the circuit board or are in breakable electrical contact with a respectively associated, rigid contact assembly. The contact assembly is soldered directly to the circuit board. 1. A pilot device for a hydraulic directional valve , comprising:a housing configured to be mounted externally on the directional valve via a mounting surface, the housing equipped with an electrical plug connection that is accessible from the outside;a pilot valve received within the housing and configured as a cartridge valve having a valve axis, the pilot valve including an electromagnetic actuating device;a displacement sensor received within the housing, the displacement sensor including a soft iron core, which, in the region of the mounting surface, is coupled for movement to a control spool of the displacement valve so that it is linearly movable along a sensor axis;an electronic circuit board received within the housing;a fluid feed, a fluid return, a first control connection, and a second control connection (i) arranged on the housing in the region of the mounting surface and (ii) fluidically connected to the pilot valve; andat least two coils arranged around the soft iron core, the at least two coils combined to form a coil assembly,wherein the valve axis and the sensor axis are arranged substantially parallel to one another so that they ...

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Номер записи: 96
16-11-2017 дата публикации

Valve Arrangement

Номер: US20170328383A1
Автор: Neef Bodo
Принадлежит:

A valve arrangement for a fluidic supply of a fluid load, with several main valves designed for influencing fluid flows at the fluid ports, and with electrically controllable pilot valves designed for fluidic control of the main valves. A base body is assigned a connection plate lying opposite a connection face and having a fluid passage which leads into an operating port for the connection of a fluid load wherein, between the connection face and the connection plate there is provided a separate passage body which has at least one connection passage for a fluidically communicating link between at least one of the fluid ports and the operating port, and at least one connecting conduit for a fluidic coupling of at least two fluid ports. 156. A valve arrangement for a fluidic supply of a fluid load , with several main valves which are connected , with fluidic communication , to respectively assigned fluid ports and which are designed for influencing fluid flows at the fluid ports , wherein the fluid ports are located at least partly on a connection face of a base body , and with electrically controllable pilot valves ( , ) which are designed for fluidic control of the main valves , wherein the base body is assigned a connection plate lying opposite the connection face and through which runs a fluid passage which leads into an operating port for the connection of a fluid load wherein , between the connection face and the connection plate there is provided a separate passage body which has at least one connection passage for a fluidically communicating link between at least one of the fluid ports and the operating port , and at least one connecting conduit for a fluidic coupling of at least two fluid ports.2. The valve arrangement according to claim 1 , wherein at least one main valve and/or at least one pilot valve have or has a preset preferred position.3. The valve arrangement according to claim 1 , wherein claim 1 , in the connection plate claim 1 , a further fluid ...

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Номер записи: 97
17-10-2019 дата публикации

Actuator arrangement

Номер: US20190316605A1
Автор: Artem Beger
Принадлежит: Festo SE and Co KG

An actuator arrangement, having a drive for providing a rotational movement about an axis of rotation and which includes an actuator housing whose outer surface extends with a curved profiling along the axis of rotation and which delimits a working space, in which a working element is rotatably accommodated, which includes a drive shaft which penetrates a front surface of the actuator housing, wherein the actuator housing is penetrated by a working port, which is designed for a connection of the working space with a valve arrangement, and with a valve arrangement, which is designed for a provision of a fluid flow at the working port and which includes a valve module, which is accommodated in a valve shaft of a valve housing and which has a fluid port, wherein the valve housing extends with a profiling in the form of a circular ring section along the axis of rotation.

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Номер записи: 98
17-10-2019 дата публикации

Aircraft Hydraulic System With A Dual Spool Valve And Methods Of Use

Номер: US20190316606A1
Автор: Fox Michael Thomas, Howell Eric Anton, Roach Jeffrey M.
Принадлежит:

A dual spool valve and methods of controlling hydraulic fluid that is moved to a hydraulic actuator of an aircraft. The dual spool valve may include first and second manifolds that each includes a movable spool. Multiple ports are positioned in each of the manifolds. The movable spools are positionable within their respective manifolds to control the movement of the hydraulic fluid that is supplied to and removed from the hydraulic actuator. 1. A valve to direct hydraulic fluid to a hydraulic actuator in an aircraft , the valve comprising:a first port to receive hydraulic fluid from a supply line;a second port to discharge hydraulic fluid to a return line;first and second valve sections each comprising a manifold, a first line fluidly connected to the first port, a second line fluidly connected to the second port, and a third line fluidly connected to the actuator and with the manifold of the first valve section being spaced away from the manifold of the second valve section;a first spool positioned in the first manifold and a second spool positioned in the second manifold, each of the first and second spools movable to prevent the flow of hydraulic fluid when aligned with one of the first and second lines;each of the first and second spools independently positionable within the respective first and second manifolds between a first position aligned with just one of the first and second lines, and a second position aligned with just the other of the first and second lines, and with the first and second spools spaced away from the third lines in each of the first and second positions to allow hydraulic fluid to flow into and out of the actuator.2. The valve of claim 1 , wherein each of the first and second spools comprises a first block and a second block that are spaced apart along a shaft and with the first blocks aligned with one of the first and second lines in the first position and with the second blocks aligned with the other of the first and second lines in ...

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Номер записи: 99
17-10-2019 дата публикации

Aircraft Hydraulic System With A Dual Spool Valve And Methods Of Use

Номер: US20190316607A1
Автор: Fox Michael Thomas, Howell Eric Anton, Roach Jeffrey M.
Принадлежит:

A dual spool valve and methods of controlling hydraulic fluid that is moved to a hydraulic actuator of an aircraft. The dual spool valve may include ports to receive and discharge hydraulic fluid. The dual spool valve may also include first and second valve sections that are selectively positionable to control the flow of hydraulic fluid into and out of the actuator. One position provides for hydraulic fluid to move through closure lines. Method of controlling the dual spool valve may provide for selectively positioning the valve sections to control the flow of hydraulic fluid, and to position the valve sections to move hydraulic fluid through a closure line during certain circumstances. 1. A dual spool valve to direct hydraulic fluid to a hydraulic actuator in an aircraft , the dual spool valve comprising:a first port to receive hydraulic fluid from a first supply line;a second port to discharge hydraulic fluid to a return line;a third port to receive hydraulic fluid from a second supply line; a first manifold with a supply port, a return port, and an actuator port;', 'a first closure line that extends between the third port and the actuator; and', 'a first spool movable within the first manifold between a first position to allow hydraulic fluid to flow through the first valve section to and from the actuator through just the supply port, a second position to allow hydraulic fluid to flow through the first valve section to and from the actuator through just the return port, and a third position to allow hydraulic fluid to flow through the first valve section to and from the actuator through just the first closure line;, 'a first valve section comprising a second manifold with a supply port, a return port, and an actuator port;', 'a second closure line that extends between the third port and the actuator; and', 'a second spool movable within the second manifold between a first position to allow hydraulic fluid to flow through the second valve section to and from the ...

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Номер записи: 100