Abstract: A pilot controlled pulse valve has a valve spool releasably held in both terminal positions by a latching device. The latching device comprise a permanent magnet holding the valve spool by magnetic force. To set the terminal or end position the permanent magnet has an abutment placed to the fore of it. In order to protect the permanent magnet against damage the abutment bears against the valve housing independently of the permanent magnet.

Abstract: A valve section that functions as a solenoid valve device that includes a pressure adjusting section that adjusts fluid pressure supplied from a fluid pressure source; a pump section that sucks and discharges working fluid in a reservoir; and a single solenoid section that drives the pressure adjusting section and the pump section.

Abstract: A composite valve includes a main valve unit that individually opens and closes a vacuum channel for applying vacuum pressure to a load and a pressure channel for supplying vacuum-breaking pressure fluid with two valves for vacuuming and pressurizing; a channel combining section that connects the vacuum channel and the pressure channel to the load via a combining port; and a pilot valve unit that opens and closes the valve members individually with two pilot valves. The main valve unit, the channel combining section, and the pilot valve unit have the same width, and connect to one another in line along the axis of the valve.

Abstract: The present invention includes fluid control systems employing compliant electroactive materials.

Abstract: To obtain a manifold type solenoid valve assembly in which an solenoid valve which is equipped with an output port and an solenoid valve which is equipped with no output port are mixed and mounted on a common manifold base. On a valve mounting part of the manifold base which has a plurality of the valve mounting parts of the same type, a first solenoid valve which is equipped with an output port for external piping connection is mounted and a second solenoid valve which is equipped with no output port is indirectly mounted through an intermediate block which is indirectly equipped with an output port for the second solenoid valve.

Abstract: A fluid pressure circuit that can, in either case where a first actuator that is fed from a first pump or a second actuator that is fed from a second pump is operated, by allowing feeding of the hydraulic fluid to a specific actuator from either the first or second pump, improve interlockability with the specific actuator. A control valve is incorporated with a plurality of first-group spools fed from a drive pump and a plurality of second-group spools fed from an idle pump. A solenoid selector valve unit switches a pilot line of a second-group tool controlling spool to a communicating state at the time of detection of a spool operation by a first pressure switch and switches a pilot line of a first-group tool controlling spool to a communicating state at the time of detection of a spool operation by a second pressure switch.

Abstract: A solenoid actuated pilot valve includes a pilot valve housing defining a pilot valve chamber and a solenoid. The solenoid includes and end cap connected to the pilot valve housing, a reciprocable plunger, and a piston having a shaft with a first end connected to and end of the plunger and a second end connected to a piston head. The end cap has a bore through which the shaft of the piston reciprocates and a first port separate from the bore. A first seal on a first side of the piston head is provided for sealing a first end of the first port. A second seal on a second side of the piston head is provided for sealing a first end of a second port in the pilot valve housing.

Abstract: A valve control unit that prevents a decline in interlocking operation performance when pilot pressure control of a plurality of pilot-operated control valves is carried out by proportional solenoid valves. First and second proportional solenoid valves include a Common Operation Table of lever operation amount/boom-up pilot pressure characteristics and are inputted with a common boom-up lever operation amount. A third proportional solenoid valve also includes the Operation Table and is inputted with a stick-in lever operation amount common to the fourth proportional solenoid valve. The fourth proportional solenoid valve includes an Operation Table of lever operation amount/stick-in pilot pressure characteristics different from that of the first, second, and third proportional solenoid valves and is inputted with the stick-in lever operation amount common to the third proportional solenoid valve.

Abstract: A proportional directional control valve having a linearly movable valve element, a magnetic assembly operatively connected to the valve element where the magnetic assembly provides a magnetic field responsive to the linear motion of the valve element, a linear Hall-effect sensor assembly configured to generate an electrical signal responsive to a change in the magnetic field, and a control system that controls the linear movement of the valve element in response to a comparison of the electrical signal and a command electrical input signal. The magnetic assembly includes a non-magnetic housing defining an axial passageway, first and second magnets disposed in the passageway, first and second magnetic pole pieces disposed be in the passageway between the first and second magnets, and a non-magnetic spacer disposed in the passageway between the first and second magnets and between the first and second magnetic pole pieces.

Abstract: A solenoid actuated pilot valve includes a pilot valve housing defining a pilot valve chamber and a solenoid. The solenoid includes and end cap connected to the pilot valve housing, a reciprocable plunger, and a piston having a shaft with a first end connected to and end of the plunger and a second end connected to a piston head. The end cap has a bore through which the shaft of the piston reciprocates and a first port separate from the bore. A first seal on a first side of the piston head is provided for sealing a first end of the first port. A second seal on a second side of the piston head is provided for sealing a first end of a second port in the pilot valve housing.

Abstract: The present invention is directed to a computer based control system for controlling hydraulic and electromechanical actuators on a power machine, such as a skid steer loader. The computer based control system is configured to implement a number of features to enhance certain operational aspects of the power machine.

Abstract: A control valve (18) for a device (1) to modify the timing of an internal combustion engine is provided. Here, a controlled rotation of the camshaft in reference to the crankshaft can be achieved via a hydraulic adjustment drive. A control valve (18) with operative connectors (A, B), a hydraulic connector (P), and at least one reservoir connector (T, T1, T2) controls the inflow of hydraulic fluid into and/or the outflow of hydraulic fluid out of the hydraulic adjustment drive. A filter (46) is arranged between the hydraulic connector (P) and the operative connectors (A, B).

Abstract: A seat member forms a bleed chamber between a spool and the seat member and has a bleed port communicated with a low pressure side. The spool is seatable against a seat of the seat member, which is formed around the bleed chamber, to disable substantial communication between the bleed chamber and a supply port, which supplies oil to the bleed chamber. An opening and closing valve plug is seatable against another seat of the seat member, which is formed around the bleed port, to close the bleed port. A push member is placed between the spool and the valve plug. When a solenoid actuator applies a drive force to the valve plug, the push member is driven by the valve plug to directly push the spool and thereby to lift the spool away from the seat of the seat member.

Abstract: A hydraulic control system for high flow applications in motor vehicles, in particular for active wheel suspensions and active steering arrangements, includes at least one passive high flow valve which is controlled hydraulically by at least one low flow valve.

Abstract: To obtain a directional control valve superior in workability and maintenanceability by mounting a pilot valve, a printed circuit board and the like on a top surface of a main valve section efficiently so that easy disassembly and assembly are achieved. A valve adapter is mounted on a top surface of a housing of a main valve section with first screws, pilot valves are mounted on the valve adapter with second screws, a printed circuit board is disposed above the pilot valves, and is electrically connected thereto, a protective cover for covering the valve adapter, the pilot valves, and the printed circuit board is mounted airtightly to the top surface of the housing with third screws, a pilot supply flow channel is formed between the valve adapter and the housing, and relay holes for bringing the pilot valves into communication with pilot flow channel ports are provided on the valve adapter.

Abstract: A hydraulic steering system for a work machine may include a first steering actuator having a first and a second chamber. In addition, the steering system may include a second steering actuator having a third and a fourth chamber. A multi-position directional valve may include at least one low power position and at least one high power position. The low power position may be configured to direct fluid only to the first chamber during a low power turn to extend the first steering actuator. The high power position may be configured to direct fluid to the first chamber and the third chamber during a high power turn to retract the second steering actuator.

Abstract: A spool type control valve is operated by an electrically driven pilot valve. A pilot piston is attached to the control spool. As an electrical actuator moves the pilot spool, a greater pressure is applied to one side of the pilot piston than the other side, which causes movement of the control spool. When the control spool reaches the desired position, its positional relationship to the pilot valve defines a pressure differential across the pilot piston which exerts a net force on the control spool that counterbalances a spring force acting on the control spool. This defines an equilibrium position at which the control spool remains until subsequent motion of the pilot spool occurs which alters the pressure differential across the pilot piston.

Abstract: In a solenoid valve 10, an annular oil groove 66 is formed at a portion corresponding to a spring chamber 56 on the external surface of a sleeve 19, a drain passage 68 is formed to make an upper part of the annular oil groove 66 communicate with the outside of an insertion bore 61, and a throttle hole 67 is provided at a lower part of the annular oil groove 66 for making the annular oil groove 66 communicate with the spring chamber 56. Since the annular oil groove 66 communicates with the outside of the insertion bore 61 at its upper part through the drain passage 68, it can be realized to store the operating oil to the height of the upper part of the annular oil groove 66, so that the operating oil can be reserved in the spring chamber 56 which communicates with the annular oil groove through the throttle hole 67. Further, the operating oil is supplied from a feedback port 48 next to the spring chamber 56 through a clearance between the spool valve 19 and a valve hole 18.

Abstract: A valve assembly comprising a valve body, a first movable pressure responsive element, and a second pressure responsive movable element, wherein the valve assembly further comprises a resilient biasing element and a movable third pressure responsive element, the resilient biasing element extending between the third pressure responsive element and the valve body and the third pressure responsive element being adapted to act on both the first and second pressure responsive elements to transmit the biasing force of the resilient biasing element to both the first and second pressure responsive elements.

Abstract: A valve accommodating hole (11), and each of a supply port (20), discharge ports (21 and 22), and output ports (23 and 24) connected to the valve accommodating hole are formed in a valve casing (15), and a valve shaft (12) is attached to the valve accommodating hole (11) so as to be reciprocable in the axial direction. Circular rubber elastic valve elements (51 and 52) are attached to the valve shaft (12) and used for switching between a communication state where either one of the elastic valve elements is spaced away from an inner peripheral sealing surface of the valve accommodating hole (11) such that the supply port (20) and the respective output port (23 or 24) communicate with each other and a shut-off state where either one of the elastic valve elements comes in contact with the inner peripheral sealing surface such that the communication is shut off.

Abstract: A control valve assembly includes a valve body having a valve opening, a first pressure passage, a second pressure passage, and a valve body land. A valve member is received in the valve opening for movement between an open position and a closed position. The valve member includes a first valve member land and a second valve member land. The first valve member land and the valve body land cooperate to define a first metering flow passage and a second metering flow passage. The first and second metering flow passages are configured to impart a hydrodynamic force on the valve member during fluid flow through the valve body, which biases the valve member toward the open position or the closed position.

Abstract: A control valve assembly includes a valve body having a valve opening, a first pressure passage, a second pressure passage, and a valve body land. A valve member is received in the valve opening for movement between an open position and a closed position. The valve member includes a first valve member land and a second valve member land. The first valve member land and the valve body land cooperate to define a first metering flow passage and a second metering flow passage. The first and second metering flow passages are configured to impart a hydrodynamic force on the valve member during fluid flow through the valve body, which biases the valve member toward the open position or the closed position.

Abstract: A controller for controlling a valve is disclosed including a manifold assembly, a valve position indicator and a trigger assembly. An operating media distribution system is disposed in the manifold assembly and an electronic control unit is disposed in the controller. The electronic control unit operates at least one electromagnetic valve to control operating media flow via the operating media distribution system to activate an actuator which opens or closes the valve. The trigger assembly includes a cylinder adapted to receive an actuator shaft and provide a self setting mechanism corresponding to the stroke length of the actuator shaft.

Abstract: A proportional pressure control valve which includes an electric first stage pilot having a single outlet port configured to provide a variable pressurized hydraulic fluid to the outlet port and at a pressure that is proportional to an electric input signal and which is variable between first and second values and further includes a second stage hydraulic valve which has a spool reciprocally moveable in a bore between first and second positions indicative of a full ON and a full OFF condition. A fluid isolation chamber is oriented in the bore and in a region between a control port and a tank port in the fluid pathway therebetween. The interior wall of the bore and the first and second diameter regions on the spool are configured to always provide a controlled volume fluid flow rate between the control port and the fluid isolation chamber.

Abstract: A low energy stepper motor driven fuel metering valve (FMV) that eliminates the need for a position sensor is provided. The stepper motor rotates a cam that replaces the flapper valve used in conventional systems. The cam rotation increases the gap between the cam and nozzle on one side of the cam and decreases the gap between the cam and nozzle on the other side. The gap differences affect the pressures on the spool piston ends, which forces the piston in the direction that will re-equalize the cam-nozzle gaps. As a result, the relatively low energy stepper motor controls the relatively high energy hydromechanical system via the dual cam-nozzle-orifice system. The cam is precision machined and assures stroke/degree gain accuracy. The hydraulic system assures the piston tracks the cam essentially perfectly except for the effects of piston stiction forces.

Abstract: To construct solenoid valves used as a solenoid assembly by assembling the solenoid valves in a group so that both collective wiring and individual wiring can be performed and the solenoid valves can be simultaneously cut off from a collective wiring power supply and an individual wiring power supply. An individually receiving connector for connecting an individual feeding connector, a switching member being able to be freely shifted between a first operational position where the connection of the individual feeding connector to the individual receiving connector is prohibited and a second operational position where the connection is allowed, and a switch operating in response to operation of the switching member are provided in a solenoid valve connected to a power supply by collective wiring.

Abstract: A regulator valve for controlling the pressure of fluid engaging a torque-transmitting mechanism in a transmission includes a valve body forming a valve bore of a plurality of passages. A spool valve slides within the valve body. A check valve selectively opens and closes one of the passages. A spring is disposed in the valve bore and biases the spool valve in one direction. The spool valve, check valve, spring, valve bore and passages are configured to control the pressure fluid provided to the torque-transmitting mechanism and a linearly increasing pressure until a first predetermined pressure is achieved and then at a second constant predetermined pressure greater than the first predetermined pressure, thus combining gradual clutch engagement during shifting with valve boost necessary for static capacity requirements. A method of controlling engagement of the torque-transmitting mechanism is also provided.

Abstract: A solenoid valve includes a main valve unit including a spool for switching a channel, and a solenoid operating unit for driving the spool, the main valve unit includes manual buttons capable of manually switching the spool, and a safety member movably disposed, and this safety member can be moved between a locking position for locking the manual buttons in an inoperative state by locking the safety member in the manual buttons and an unlocking position for unlocking the lock by disengaging the safety member from the manual buttons.

Abstract: A jet reflector servovalve includes a flexure tube and reflector that opposes a fluid nozzle and fluid receivers of the servovalve. During operation, the nozzle directs a pressurized fluid jet toward the reflector. The pressurized fluid travels within a second stage of the servovalve, toward the reflector. The reflector directs or reflects the fluid back toward the fluid receivers to adjust a position of a spool of the servovalve. The configuration of the reflector, the nozzle, and the receivers allows transmission of the pressurized fluid within the second stage of the servovalve and minimizes the necessity for multiple o-rings between the second stage of the servovalve and a torque motor of the servovalve, thereby reducing manufacturing costs of the servovalve.

Abstract: A multi-way valve has a housing with a stepped bore forming two piston guiding regions and a shoulder ring with two sealing shoulders. The housing also has a first, second and central transverse bores which are spaced along the cylindrical bore. A contact piston has a piston rod and sealing members secured thereon. The guide members are pressed fit onto opposite ends of the piston rod.

Abstract: A valve selected from the group consisting of a directional valve and a flow control valve has an inlet connection, an outlet connection, a slide that controls a fluid connection between the inlet connection and the outlet connection, the slide being configured so that it controls the fluid connection in at least two adjustable opening cross-sections that are spaced axially apart from each other and allow a partial flow to pass through.

Abstract: Two stage spool valves having, in a single assembly, a first stage spool and a second stage spool. The first stage spool may have a solenoid actuator with a return spring, with the second stage spool having either a hydraulic return or a spring return, or both. The solenoid actuator may be comprised of a stationary structure defining a magnetic flux path, including a stationary structure pole face, that together with a moveable structure, including a moveable structure pole face, define a substantially zero air gap magnetic circuit when the solenoid actuator is actuated, the pole faces of the stationary structure and the moveable structure each being defined in part by soft magnetic iron and in part by hardened steel, the hardened steel of the moveable structure contacting the hardened steel of the stationary structure and the soft magnetic iron of the moveable structure being face to face with the soft magnetic iron of the stationary structure when the solenoid actuator is actuated.

Abstract: A coupling solenoid valve having a main valve unit and a solenoid operating unit, of which both side faces in the valve-width direction correspond to a first coupling face and a second coupling face for coupling another solenoid valve, wherein a binding member is movably attached to the main unit, this binding member is provided with an engaging hook protruding on the first coupling face side, a hook-engaging portion is formed on the second coupling face side of the main valve unit, and the hook is engaged with the engaging portion of the adjacent solenoid valve, thereby coupling the adjacent solenoid valves so as to be mutually connected.

Abstract: A coupling solenoid valve, of which both side faces in the valve-width direction are coupling faces for coupling another solenoid valve, including a main valve unit for switching a fluid channel using a spool, and a solenoid operating unit for driving the spool, wherein a housing of the main valve unit is divided into plurality of blocks, a valve hole for accommodating the spool is formed in a center block, a bottom block is made up of a synthetic resin, plurality of coupling communication holes are formed in this bottom block, and also a connection tube is formed in an integrated manner.

Abstract: A valve island that has vented non-active areas is disclosed. The valve island has a plurality of active gas passageways that are coupled together between components. At the junction between the different components the active fluid passageways are surrounded by a sealing surface. The sealing surface essentially surrounds some non-active areas. The non-active areas are vented to the outside air through one or more passageways. The non-active areas may be recessed from the sealing surface.

Abstract: A device is disclosed for controlling a variable displacement compressor. The device comprises a microvalve operated control valve. A microvalve device for controlling fluid flow and a micro spool valve for use as a microvalve are also disclosed.

Abstract: A multiway valve has valve housing and at least one pilot valve arranged in it. The principal valve housing possesses an integral principal housing part wherein at least the control section of a valve spool is arranged. The pilot valve possesses a head piece which is mounted on an assembly interface formed directly on the principal housing part. This assembly interface is furthermore provided with a pilot valve seat, which is an integral component of the principal housing part.

Abstract: A valve island that has a pilot fluid passageway located on the side of the sub-base is disclosed. The pilot fluid passageway is formed into one side of the sub-base and couples the front end of the sub-base with the back end of the sub-base. A gasket or sealing device may be used to help form a seal around the pilot fluid passageway when the sub-base is joined to a mating part.

Abstract: A linear motor is provided including a stator having at least one electromagnetic coil and a rotor having at least one permanent magnet. The rotor is movable toward at least a first position when least one electromagnetic coil is energized and solely magnetically biased to a neutral position when the at least one electromagnetic coil is de-energized.

Abstract: The present invention is directed to a computer based control system for controlling hydraulic and electromechanical actuators on a power machine, such as a skid steer loader. The computer based control system is configured to implement a number of features to enhance certain operational aspects of the power machine.

Abstract: A solenoid spool valve includes a spool valve, a spring, and an electromagnetic actuator. The spool valve has a generally cylindrical sleeve provided with a fluid input port and a fluid output port and a spool supported in the sleeve for axial displacement to switch between said input and output ports. The spring abuts a first working face of said spool to energize said spool in a first axial direction. The electromagnetic actuator provides an axial drive force to a second working face of said spool in a second axial direction that is substantially opposite to said first axial direction. The first and second working faces are disposed axially inside of both axial end portions of a bearing, respectively, for slidably supporting said spool in said sleeve.

Abstract: A first housing member and a second housing member are divided by a dividing surface including a center axis of a valve hole. Connecting holes are formed in joint surfaces of the respective housing members at locations of the joint surfaces opposed to each other. Connecting pins are inserted into the connecting holes, the connecting holes and the connecting pins are fixed to each other through solder, thereby integrally connecting the first housing member and the second housing member to each other to form a housing.

Abstract: A coupling solenoid valve having a main valve unit and a solenoid operating unit, of which both side faces in the valve-width direction correspond to a first coupling face and a second coupling face for coupling another solenoid valve, wherein pilot valves are detachably attached to the top and bottom faces of a center base extending from an adapter block, electroconductive fittings for electrically connecting between coil terminals and board terminals of each pilot valve, and folding-type elastic terminal portions are provided on both ends, these elastic terminal portions are flexibly in contact with the coil terminals and the board terminals from the side-face direction.

Abstract: A two stage solenoid control valve is described. The control valve opens and closes using a single source of pressurized fluid. This source of pressurized fluid may be transmitted through the solenoid control valve and on to a downstream valve such as a bleed valve in a gas turbine engine.

Abstract: The invention relates to a control valve (10) for controlling the pressure and flow of hydraulic oil from or to the working connections (A, B) of a consumer. The pressure and the pressure flow are controlled by means of at least one sliding piston which can be actuated by at least one drive mechanism and which can be displaced in a slider hole and in co-operating annular channels. The invention is characterized in that the annular channels are symmetrically arranged, whereby a tank connection annular channel is arranged in the symmetrical centre point on a symmetrical axis. Annular channels associated with the working connections (A, B), pump-pressure annular channels, load-sensing annular channels and end-chamber annular channels are arranged behind each other on both sides. According to the invention, the latter can be connected to other channels.

Abstract: A small sized and structurally simple capacity controller having a wide control range of a compressor with variable capacity adds a differential pressure to an inhalation pressure on an arbitrary level by a piston valve body actuated by a solenoid and by the inhalation pressure. The differential pressure is transmitted into a capacity variation mechanism of the compressor in order to change the capacity of the compressor.

Abstract: Valve base module comprises a tank core passage extending within a plane containing a longitudinal axis, said plane oriented in non-perpendicular relation to a surface of said valve housing comprising at least a P, T, A, and B port and standard mounting holes for mounting said valve base module to at least one of a sub-plate or bar manifold. The plane is disposed at an offset angle ? relative to a second plane to permit one or more of at least P, T, A, and B ports to connect a first surface to an opposing second surface of the valve housing to form one or more of at least P?, T?, A?, and B? ports that permit the following additional modules to be mounted thereto: pilot control PCM, thermal insulating TIM, power supply PSM, pressure reducing PRM, diagnostic DM, load sense LSM, position feedback sensor PFSM, and manual override MOM.

Abstract: A valve block assembly includes a cartridge block and a plurality of modular pilot valve operated poppet valve assemblies. The cartridge block has a plurality of bores therein dimensioned and configured for receiving respective modular pilot valve operated poppet valve assemblies. The cartridge block has a first side and each of the bores extend from the first side into the cartridge block. Each of the modular pilot valve operated poppet valve assemblies having a supply air port, an operating air out port and an exhaust passage and each of the modular pilot valve operated poppet valve assemblies are accessible for installation and removal from the cartridge block from the first side.

Abstract: A valve actuator control monitors engine valve trajectory, lift and seating velocity and varies the timing of internal feedback control channels to correct for engine valve positioning errors to achieve precise engine valve lift, closing timing and desired seating velocity.

Abstract: A control solenoid and valve includes a valve bodying having a magnetic assembly, hydraulic assembly, and a pressure regulation member. The magnetic assembly and pressure regulation member are formed respectively on offset axes preferably substantially parallel to one another. The hydraulic assembly exchanges forces created by the magnetic assembly and pressure regulation member. This design accomplishes a more compact arrangement. The pressure regulation member includes longitudinal cavity within the valve body situated on its corresponding axis. Within this cavity, a spool valve reciprocates relative to fluid pressure interacting with the spool valve and forces generated by the magnetic assembly. To accurately sense pressure of the fluid within this cavity and acting on the spool valve, a pressure sensor is positioned at an end of the longitudinal cavity bounded by an end of the spool valve.