Motor-operated

A manually resettable valve comprises a valve body having a cylindrical portion with a wetted enclosure defined by an internal coaxial aperture within which a magnetically attractable plunger is slidable between two terminal positions establishing the states of the valve. A spring urges the plunger toward...     

A valve comprising a valve body having a chamber therein, a knife-edged valve seat in the chamber, and a knife edge in the chamber substantially circumscribing the valve seat. First and second passages are provided in the valve body leading to the chamber with the first passage terminating in a port...     

An all ports in body, solenoid operated valve assembly includes a valve body and a valve operator mounted on the body with an electromagnetic core featuring a center leg projecting axially beyond the solenoid coil. A plunger and seal assembly is mounted for reciprocation along a path of movement aligned...     

A bistable, electromagnetically-actuated valve has a closed chamber containing a moving armature with a valve orifice in each end of the closed chamber, one of which is formed by the end of a tube, a space around the tube forming the third fluid connection to the closed chamber. The armature has valve...     

A three way solenoid valve comprising a housing which contains a cylindrical cavity around which an electric coil is disposed. Two seats extend perpendicularly relative to the cavity axis and are arranged opposite one another. The seats communicate respectively with an inlet orifice and an outlet orifice....     

A solenoid operated 3-way, 2-position directional control valve for use in an antiskid regulation system includes an armature controlled by a solenoid and is firmly connected to a valve spool movable in a bore. The valve spool enables an outlet port to wheel brake cylinders to communicate with a fluid...     

A differential pressure control valve is solenoid operated on a controlled duty cycle to alternately open and close a pair of inlets to establish a desired outlet pressure. The valve member acts as a solenoid armature. It is of sandwich construction with a magnetically soft center section and a thin,...     

A four-way fluid flow control valve for selectively interconnecting opposite sides of a fluid motor with a source of fluid pressure and a low pressure return line for driving the motor in opposite directions. A clevis-like, bifurcated metering member has opposed, cup-shaped elements at its bifurcated...     

A valve including a ball vibrated by a solenoid operated spring biased plunger wherein the ball is moved against one end of each of inlet and exhaust ports alternately in a somewhat oversized cavity to control, for example, the pressures on respective opposite sides of a displacement adjustable piston...     

A solenoid-actuated four-way fluid control valve assembly has a body assembly mounting a pair of solenoids and defining two valve chambers each containing an axially elongated generally L-shaped plunger assembly and a pair of valve seats. Each plunger is spring biased to closing engagement with one of...     

A spool valve arrangement includes a housing having a flow-through passage formed with a fluid-admitting inlet and a pair of fluid-discharging outlets, and a pair of pressure-relief chambers each associated with a respective outlet for relieving pressure thereat. The arrangement further comprises a spool...     

A valve assembly comprises a valve carrier slidably received in a central bore of a valve body, a valve washer assembly mounted for movement with the carrier, the washer assembly including at least one spherically shaped contact surface for contacting an annular seat located between inlet and outlet...     

A solenoid operated valve has a valve body forming a chamber provided with a valve seat at its center. A fluid port communicating to an aperture formed in the center of said valve seat and another fluid port communicating to said valve chamber through a passage. An electromagnet body of a ring shaped...     

A solenoid actuated pilot valve for handling high pressure fluids wherein a single inlet and outlet shear seals are used on the gate which is mounted for movement on roller bearings to reduce frictional loads in moving the pilot valve gate in an unbalanced condition.

An electrically controlled valve is arranged to be mounted on a printed circuit without requiring any fasteners other than the terminals which provide electrical connections to the coil of a solenoid. The valve has three ports arranged to permit one of the ports to be selectively connected to either...     

Simple 2-way, 3-way and 4-way poppet valves employ thermo-electric operators in lieu of solenoid operators to shift poppet stem inside valve housing for a position change when operator is electrically energized thereby producing heat which creates high internal operator pressure by a working fluid housed...     

A double acting electromagnetic valve is composed of a tubular main body internally having a valve chamber, a pair of magnetic cores each having a concentric polar arrangement thereby to provide an E-shaped axial section, secured respectively on both sides of the main body, the cores being made of a...     

A valve comprising a valve body having a bore, a hollow plunger reciprocable within said bore and having radial ports to control flow of fluid under pressure between various valve body openings. Seals are disposed about the exterior surface of the plunger to seal against fluid flow longitudinally of...     

In the disclosed system a motor axially displaces a screw-threaded movable valve member by rotating it within an interiorly threaded collar. A sensor detects the movable valve member's axial position. An electrical feed-back circuit compares the sensor output with a reference value and drives the motor...     

An electromagnetic motor is provided with a samarium cobalt permanent magnet comprising a plurality of radially abutting segments. A combination of linear and non-linear springs with a force gradient larger than the magnetic force gradient facilitate motor operation in proportion to currents in electrical...     

A control mechanism for a hydraulically driven vehicle in which a control member is mounted and linked to forward and reverse actuating pedals such that when one of the directional pedals is depressed the control member body is maintained stationary and an operating shaft is rotated to generate a first...     

In a Solenoid Operated Pilot Valve, the solenoid plunger serves as a valving element blocking the flow of pilot fluid through orifices disposed at opposite ends of the plunger movement with the plunger being shifted in one direction under the influence of the solenoid coil to block the pilot fluid flow...     

A valve is operated between open and closed positions by respective solenoids. The valve is latched in each of the open and closed positions by a snap disc mounted in a position fixed relative to the plunger, and a pair of shoulders fixed relative to the valve body.

In a non-drip valve for a fluid flow line having a vacuum unit comprising supply chamber, a discharge chamber and a vacuum chamber connected to the discharge chamber to withdraw fluid therefrom when the forward flow is arrested, an improved control valve controlling the flow of fluid from a source to...     

In a carburetor, an electromagnet energized according to a pulse width modulated duty cycle has a stationary pole member which drives a pair of magnetically responsive valves--one or both being permanently magnetic--to control fuel flow through a main metering orifice and air flow through an idle air...     

A high capacity direct acting three-way bistable power operated valve is connected to control operation of an hydraulically operated magazine sprinkler control valve. The three-way bistable valve controls application of high pressure sea water and includes a slidable hollow valve spool having one end...     

In a spool-sleeve type change-over valve, the axial width of the intake passage is reduced relative to that of the discharge passage within a range in which the same cylinder response as attained by intake and discharge passages of the same axial width is retained.

A valve assembly for regulating the amount or pressure of hydraulic fluid supplied to a hydraulically operated machine system comprises a progressively movable valve member, especially a rectilinearly-moving valve spool controlling ports in a ported valve sleeve, a motive power unit, such as an electric...     

A four way valve assembly is provided which includes a main valve member operable by independent pilot valve actuation. The independent pilot operation means that the main valve stroke can be varied over a relatively wide range, enabling the valve to be produced in a number of sizes without requiring...     

In a pressure control device for applying modulated pressure to a servo chamber of a vacuum servomotor in response to an output signal from an electric control circuit, the control device includes a modulator valve for modulating pressure in the servo chamber, a solenoid winding to be energized by the...     

A solenoid-operated fluid control valve has an armature assembly which includes a reciprocally movable platelike magnetic valve member and a seal element loosely retained by the valve member and projecting therefrom. A magnetic core defines a fluid passageway and has a valve seating surface at its one...     

A valve for controlling the flow of a liquid under pressure and capable of flowing a maximum amount of liquid and still be shifted by a commercially available, industry standardly-accepted solenoid. My improved valve utilizes only four dynamic seals between the valve plunger and the bore through which...     

A three-way normally closed or open solenoid-actuated valve having the solenoid coil wound on a spool and therewith inserted uncoated through a side into a solenoid housing and in place encapsulated in an epoxy resin for protecting the coil and by wedging the spool against relative movement in the housing,...     

A vacuum servomotor comprises a cup-shaped casing having a bottom wall provided thereon with a vacuum nozzle for connection to a source of vacuum and an air nozzle in communication with the atmosphere, the casing being integrally formed with a cylindrical support structure extending inwardly from the...     

The electromagnetically operated sliding spool control valve particularly for use in connection with an automatic transmission system of a motor vehicle, comprises an armature of the electromagnet which is supported at one end of a plunger the other end of which is formed into a sliding spool. The spool...     

A bistable actuator comprising a magnetic member moveably mounted, in a housing of magnetic material, for movement between two positions. In each position such member is positively located adjacent a respective permanent magnet. Pole piece means is centrally located between the permanent magnets and...     

An electromagnetic valve for handling fluid media has a valve mechanism which includes at least one valve seat and a valve-closing member which cooperates with the valve seat or seats. The motion of the valve-closing member is controlled by linkage that is connected to the moving arm of an electromagnet,...     

The invention relates to a magnetic valve in which the electromagnet is housed in a chamber which is not infiltrated by the pressure medium to be controlled, and in which a rod coupling is effective between the armature of the electromagnet and the closure body of the valve inserted between a pressure...     

A mechanism for controlling the position of a movable member and for locking it in any desired position comprising a hydraulic displacement device movable with the member and a slide valve hydraulically connected to the displacement device to control flow of liquid to or from the device. The slide valve...     

A three-way, normally closed only, pilot valve for supplying pressurized pilot air to a fluid flow control valve, such as a four-way valve, a three-way valve, a two-way valve, or the like, for shifting the main spool valve of such valves. The pilot valve includes a valve body with a pressurized pilot...     

An armature of magnetizable material is mounted within a magnetic housing by means of a pair of Belleville springs so that the armature is movable along the central axis thereof between opposed pole pieces formed in the housing. A radially magnetized permanent magnet is positioned in the housing concentric...     

A magnetically actuated pilot valve for fluid control systems which can direct a fluid pressure for operating a device or it can connect said device to drain. The magnetically actuated pilot valve includes a top and bottom section with fluid pressure entering the top section, a connection to drain extending...     

The present invention is an electrically controlled valve (10) that includes an elongated valve body (38) with an axial passageway (48) disposed along the elongation axis (44) thereof. The valve body (38) has at least one inlet passageway (52) and at least one outlet passageway (56, 58) in fluid communication...     

The invention relates to a magnetic valve in which the electromagnet is housed in a chamber which is not infiltrated by the pressure medium to be controlled, and in which a rod coupling is effective between the armature of the electromagnet and the closure body of the valve inserted between a pressure...     

An electromagnetic valve assembly including a housing, a diaphragm member provided in the housing and defining first and second chambers therein, a first heat conducting plate member secured to the diaphragm member, a heat conductive output member secured to the first heat conductive plate member and...     

An electromagnetically controlled hydraulic servo-control valve includes a hydraulic slide activated by an electromagnet with a plunger. The distributed pressure hydraulically pushes the slide and the plunger toward each other. Constrictions in the hydraulic conduits attenuate oscillations. The plunger...     

A simple momentary contact diverter valve is operated directly by axially disposed solenoid operators at each end of an elongated valve housing having a bore passing therethrough to receive a valving spool therein in an operable relationship with said solenoid operators so as to enable spool shifting...     

A first member of a magnetic housing has a core with a central passage and contains an electrical coil, and a second member of the housing has a ball cavity which receives and guides a magnetic ball. A central conduit and peripheral conduits enter the cavity of the second member. When the coil is activated,...     

Universal momentary contact diverter valve is operated directly by axially disposed solenoid operators at each end of an elongated valve housing having a bore passing therethrough to receive a valving spool therein in an operable relationship with said solenoid operators so as to enable spool shifting...     

In an electromagnetically operated valve unit, a stationary core and a spring loaded moving-core are coaxially arranged within an axial bore extending across a lateral plate member of magnetic material, and a U-shaped yoke member of magnetic material has a head portion engaged with the stationary core...     

This invention is an electrically controlled single stage hydraulic valve in which the valve spool is moved along the valve sleeve by a small force motor. The valve has spool to sleeve centering devices on the periphery of the spool which reduce friction between the spool and the sleeve by automatically...     

A solenoid valve for opening and closing a fluid passage formed therein by the movement of a movable core in which a coil is wound around a resin bobbin and a stator core is fixed at one end portion of a center hole of the bobbin. A magnetic path plate having a ring-shaped portion and a flanged portion...     

A solenoid valve having a valve body and a magnetic head with a chamber arranged between a pair of magnetic cores. A movable armature is provided in the chamber and has a sealing member movable therewith between open and closed positions relative to a passageway through one of the magnet cores. A spring...     

A position indicating valve is disclosed and includes a housing, a valve port through the housing, and a valve member mounted on the housing for movement toward and away from the valve port. An electrically conductive valve seat is disposed about the valve port, and an electrically conductive valve seal...     

A magnetically actuated pilot valve for fluid control systems which can direct a fluid pressure for operating a device or it can connect said device to drain. The magnetically actuated pilot valve includes a top and bottom section with fluid pressure entering the top section, a connection to drain extending...     

A rotary valve, and more particularly a rotary directional control valve having a rotatable valve member operable by a two-stage operating lever providing a relatively long lever arm and an intermediate shorter lever arm. Solenoid-actuated actuator members are movable along a line for engagement with...     

This invention relates to force motors that are used in single stage hydraulic valves that are responsive to electrical input signals. The inertia of the force motor is reduced by having only a small portion of the force motor move. By reducing the mass of the moving parts of the force motor the force...     

An electromagnetic diesel fuel injector of the type that is continuously supplied with pressurized fuel and having a pressure actuated injection nozzle at one end thereof is provided with a solenoid actuated spool valve means that is operative to selectively effect communication of the injection nozzle...     

A magnetically actuated pilot valve for fluid control systems which can direct a fluid pressure for operating a device or it can connect said device to drain. The magnetically actuated pilot valve includes a top and bottom section with fluid pressure entering the top section, a connection to drain extending...     

A hydraulic control system for use in machine tools, construction machines, hoists and the like, with a driven unit the hydraulic circuit of which is controlled by one or more electromagnetically positioned slide valves, and with an arrangement for automatically regulating the velocity of the hydraulic...     

An electro-hydraulic control valve comprises a central body in which is formed a bore located within which is a valve member. At least the end portions of the valve member are formed from magnetizable material. The body carries solenoid devices disposed at the opposite ends of the bore so that when the...     

A magnetic flux-shifting or magnetic latch valve includes a first flux path including a first permanent magnet having a large coercive force so that its polarity cannot readily be altered. It further includes a second flux path including a second permanent magnet having a small coercive force so that...     

A three-way normally closed only, pilot air valve for supplying pressurized pilot air to a directional flow control air valve, such as a four-way valve, a three-way valve, a two-way valve or the like, for shifting the main valve spool of such valves. The valve includes a valve body having a pilot air...     

A solenoid-operated pneumatic valve in which the air vent tube has a nut threaded onto the one end thereof. A first sealing portion of the nut engages the solenoid valve body and a second sealing portion engages the air vent tube to prevent the entry of dirt and moisture into the area of the magnetic...     

Apparatus for subjecting a test specimen to vibrational forces has a base, a first preselected massmounted for reciprocal movement relative to the base and a second preselected mass elastically coupled to the first mass to produce a resonant condition at a preselected frequency of reciprocal movement.

A direct drive type servo motor in which a spool is driven directly by a force motor, the force of the force motor being balanced by the reactional force generated by a resilient member to stabilize the position of the spool to control the flow of working fluid. The resilient member is constituted by...     

A valve respirator device for use both on human and on animal patients. The device comprises a housing having an inport, an outport and an exhaust port. The outport is connected to the patient's respiratory system, the inport is connected to a source of air and the exhaust port is open to the surrounding...     

An electromagnetic switching valve wherein an appropriate relation is set for the resilient forces between a spring for actuating a valve body that closes or releases the passage of fluid and a spring for actuating a movable core that is incorporated with the valve body and moved by electromagnetic operation...     

A variable displacement pump control system comprising a variable displacement pump having a movable element for controlling pump displacement, a hydraulic motor for moving the movable element, and a transducer for producing an electric signal corresponding to the actual position of the movable element....     

A servovalve apparatus comprising a servovalve and a force motor operatively connected to a valve element of the servovalve for driving the valve element. The force motor includes an annular magnet, and first and second members cooperating with each other to define therebetween an annular gap concentric...     

A pressure control valve construction comprising a valve body having an inlet port adapted for connection to a pressure source, a pair of working ports adapted for connection to respective loads, and a pair of outlet ports connected to a reservoir. A control spool is movably mounted in a bore in the...     

A pressure control valve arrangement includes a control slide valve body which is slidably accommodated in a central bore of a valve housing. The control slide valve body is acted upon at one of its axial sides by the controlled pressure, and at its other axial side by a tappet of a proportional electromagnet....     

A pressure reducing valve comprises a valve housing having an axial bore coupled to a fluid operated load device, and first and second transversely extending control bores coupled to a supply tank and a fluid pressure source, respectively. A control slide is axially shiftable in the axial bore and has...     

A shear valve includes vent, supply and regulated ports, with the latter two including coaxial connection means.

An electrovalve includes two interlockable parts, one rigidly connected to a core, and the other carrying a single valve member. Two identical superimposable parts receive the two interlockable parts. The two superimposable parts have seats for the valve member and provide channels for connecting ports...     

A three-way valve assembly having a reciprocable valve plunger movably controlled by a solenoid. The valve housing has an elastomeric orifice member seated thereon, which orifice member controls flow of pressure fluid from a source. The valve plunger has an enlarged nondeformable valve surface thereon...     

A solenoid valve has a housing in which is disposed a coil, a sleeve valve and a plurality of hydraulic fluid passages. The passages are formed in a cylindrical core which is integral with and extends axially from an end wall of the housing. The sleeve valve is slidably mounted on the core and has a...     

The invention relates to a magnetic valve for a refrigeration plant. The valve is of the type having a magnetic coil with a plug member of magnetic material projecting into a central bore thereof. The yoke has parallel limbs. A housing block member is mounted in fixed relation to the coil and in spaced...     

The solenoid valve has an exciter coil formed with a central passage which at one end guides a plunger or armature of a permanently magnetic material which is polarized in the direction of its axial movement. At the other end of the passage there is provided a tubular core of a magnetically soft material...     

A valve assembly with a bank or row of switching valves has a base plate of u-like cross section with two flanges and a web therebetween. Within one of the flanges there is a common supply duct and in the other there is a common air outlet duct for the valves placed on the plate. The housings of the...     

A three-port, two-position electrohydraulic valve has an elongated valve member reciprocatably guided in a bore of the valve housing only by two sealing rings of small friction and including only two further sealing rings cooperating with sealing edges respectively provided on the valve member and the...     

Miniaturized valves having fast response time and characterized by low power requirements and minimal fluid consumption. A main valve member, which is movable and determines the state of the valve, is responsive to the state of a control member which may be a solenoid operated pilot valve.

An electromagnetic valve including an electromagnetic unit having a magnetic core, a coil bobbin arranged around the core, an electromagnetic coil wound around the bobbin, a stationary yoke and a first valve seat formed in a flange of the coil bobbin and a valve unit having a movable yoke, a valve stopper...     

The invention concerns a solenoid valve with three ways and three positions, having a general construction with symmetry of revolution about an axis (1) and incorporating a magnetic armature (4) which is movable in translation along this axis under the action of an electromagnetic coil (3) and of a return...     

An electrically controlled valve using a piezoelectric strip as an actuator can be constructed so as to include a valve body having separate pressure and return chambers connected by two different load passages. These load passages are connected to service ports used to connect a load to the valve. These...     

A pressure controller has a magnetic coil and a magnetic armature arranged in a housing, a control piston movable in a distributor housing and actuatable by the armature, and a shaft supporting the armature and having two ends facing towards and away from the control piston, where the end facing away...     

A magnetic flux-shifting or magnetic latch valve includes a first flux path including a first permanent magnet having a large coercive force so that its polarity cannot readily be altered. It further includes a second flux path including a second permanent magnet having a small coercive force so that...     

In one form of the present invention, a plurality of serovalves are connected to a common manifold. The manifold transmits fluid pressure from the servovalves to a modulator piston which controls the fluid pressure applied to a hydraulic actuator piston. The servovalves are designed such that, if the...     

A control valve assembly 10 having a pair of axially opposed seats 54, 56 is disclosed. A poppet 66 is disposed in a control chamber 58 between the seats. The poppet is movable between the seats to establish an average pressure in the control chamber. The poppet is an integral portion of an armature...     

The pressure response of a pressure control valve is adjusted by a solenoid valve of which the solenoid is connected to an electrical three point control device. A programmed signal and an actual signal derived from a transformer of the control pressure valve are fed to the input of the three point control...     

A direct-acting servo valve wherein a spool is directly driven by a force motor including a coiled first bobbin located in a first magnetic circuit composed of a first yoke and a first magnet mounted on the yoke includes a second magnetic circuit composed of a second yoke and a second magnet located...     

A high performance pinch tube valve for accurate, reliable, high speed and precise control of relatively low viscosity fluids. The valve is particularly adapted for use in apparatus for controlled pattern dyeing of textile material, such as carpet, with liquid dye streams. The valve includes a valve...     

A pressure-reducing valve is secured to a proportional magnet by resiliently connecting the valve sleeve of the valve receiving the piston to the housing of the proportional magnet, thus avoiding possible deformations of the valve sleeve resulting from mounting. Furthermore, the operational safety of...     

In a miniature solenoid valve having a valve casing with a valve chest and a plurality of flow passages in communication with said valve chest formed therein; a valve body movably received in said valve chest for controlling the communication between the valve chest and said passages; and a solenoid...     

A solenoid valve comprising a housing including a first transverse wall, a first axial extension extending from the transverse wall, and an integral peripheral wall extending axially in the opposite direction from the periphery of the transverse wall. A center pole member includes a pole extending axially...     

The invention relates to a pneumatic setting device having oppositely operable magnetic valves for alternately pressurizing and exhausting expansible chambers formed by one or more diaphragms to which a reciprocatable setting element is attached. In this construction a return spring may be omitted.

A solenoid valve having an exciter coil is formed with a central passage for guiding an armature of a permanently magnetic material which is polarized in the direction of its axial movement. At the other end of the passage there is provided a tubular core of a magnetically soft material which acts as...     

A multiple-position solenoid-operated control valve having a valving member in the form of a spool fitted in a valve body so that it is normally held at its normal position by a first spring and slidably movable at least to two or more operated positions on one side of the normal position. The spool...     

A two-stage hydraulic solenoid valve for controlling the application or release of hydraulic pressure to components of a steam turbine control system. The valve includes a primary hydraulic circuit in which a floating poppet operates between first and second valving positions to connect the valve's outlet...     

A pulse width modulated solenoid valve having a housing and includes a pole member including a pole piece extending axially inwardly of the housing, and a transverse wall extending radially outwardly into engagement with a peripheral wall. The pole piece has an axial opening therethrough and defines...