Reciprocating

A well safety valve comprises: A tubing in a well and having a first side port through which well production fluid is flowable, B first means including a valving sleeve movable up and down between predetermined positions on the tubing to control flow of production fluid through said port, said means...     

A fluid control valve comprising a housing having at least two chambers separated by a wall. An opening is bored through the common wall of the two chambers and a tubular gate means sealably and slidably positioned in the bore so that it can move from one position where it seals off a first chamber to...     

A slide valve in which the valve member has an apertured interior partition extending in the direction of sliding movement of the valve member in a position intermediate a ported wall with which the valve member is engageable and a further wall of the housing containing a cavity, the surface areas of...     

A pressure reducer has a housing with an inlet and an outlet. A valve disc is located in the housing and a valve stem reciprocally and sealably moves in the valve disc with the outer end secured to a resilient diaphragm. The inner end of the valve stem extends into the inlet and is secured to a tubular...     

A refrigeration system has the system condenser exposed to the normal outdoor ambient temperature. The control means includes a single balanced expansion valve having a maximum port opening which is oversized as compared to that required only for normal summer operation, and the valve is actuated to...     

A shutoff and control slide includes a cylinder having at least one row of circumferentially spaced elongated openings, and a sliding sleeve mounted for axial displacement in the cylinder. Rings are sealed to the inner surface of the cylinder on opposite axial sides of each row of openings, and each...     

A valve device particularly adapted for remote electrical operation at very low power levels has actuator means which are located outside a valve body but which are operatively connected to a valve member within the body through a flexible diaphragm which seals the valve body without excessively restricting...     

This invention relates to a solenoid valve primarily intended for association with agricultural equipment and provides a balanced valve for controlling the spraying of fluids wherein the armature is separated from the fluid and which requires minimum electrical power for actuation because of a balanced...     

An enclosed hollow plug having a plurality of discretely located apertures, for an in-line valve cooperating with an opening for adjusting its area wherein the apertures are so sized and located that flow into and out of the hollow plug creates a pressure therein that varies for counterbalancing the...     

A flow control valve includes a valve body defining a main bore and a cross-drilled bore communicating therewith. A valve spool is reciprocable within the main bore and includes first and second lands connected by a reduced diameter connecting portion. The connecting portion has fixed relative thereto...     

An improved bi-directional pressure balanced valve includes a deflecting device at the axial opening in the closure disc to prevent an over balancing of the main valve disc assembly when fluid flow from the first flow passage impinges on the axial opening during closure of the valve. The preferred deflecting...     

A water spigot has a quickly attachable and detachable nozzle for sanitary, assembly and constructional purposes. The nozzle besides producing a uniform flow denys access to the valve element and its actuator thereby greatly minimizing possibility of contamination which otherwise exists by persons who...     

A flow control valve particularly useful for a vapor recovery system of a gasoline station. Gasoline and gasoline vapor flow through separate passages in the valve. A restriction (venturi) is provided in the gasoline passage so that a pressure differential will be produced in the passage as a function...     

A hydraulic valve has a non-heating, low-power electric control. A main valve is movable in a main valve body to interconnect and isolate pressure, tank or drain and cylinder passages. Pressure to operate the main valve is controlled by pilot poppet valves having passages joined to the pressure and tank...     

A fluid valve for use in a two handle faucet assembly has a housing, a sleeve within the housing, a stem positioned within the sleeve with a handle portion extending outside of the sleeve and housing, and a reciprocal piston. Rotation of the stem causes reciprocation of the piston. A grommet-type seal...     

A manually operable valve for controlling the displacement of a main pump in a hydrostatic transmission controls the quantity of fluid flow to the main pump for low speed operation of the transmission and controls the pressure of the fluid flowing to the main pump during periods of high speed operation...     

A valve comprising a housing with an inlet and outlet and a chamber in between, a reciprocating gate mounted in a gate seat disposed within the chamber for opening and closing the valve, an upper bonnet for closing the chamber at one end and a lower bonnet for closing the chamber at the other end, the...     

A flow control valve particularly useful for a vapor recovery system of a gasoline station. Gasoline and gasoline vapor flow through separate passages in the valve. A restriction (venturi) is provided in the gasoline passage so that a pressure differential will be produced in the passage as a function...     

A valve device particularly adapted for remote electrical operation at very low power levels has actuator means which are located outside a valve body but which are operatively connected to a valve member within the body through a flexible diaphragm which seals the valve body without excessively restricting...     

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...     

Fluid flow control devices comprise a cylinder and a piston movable therein in accordance with the pressure at the outlet of the device. The piston rod is fixed to a regulating sleeve which moves with the piston to enlarge or restrict a passageway from the inlet to the outlet in accordance with the outlet...     

The present invention is directed to pulse dampener devices of the type employed to dampen pulses within hydraulic systems such as result from the use of pumps of the piston type. The device includes a pressure vessel having a movable partition therein, dividing the vessel into two chambers, each having...     

A fluid flow control valve to be interposed in the depending end portion of a large diameter casing projecting downwardly below the ocean thermocline and forming a cold water passageway for moving water to the surface. The valve includes a jacket surrounding the casing and spanning a transverse partition...     

A centrifugal pump includes a housing containing an impeller mounted on a shaft which is journaled for rotation within the housing. An inlet to the housing directs fluid from a supply to one end of the impeller and axially spaced first and second volute diffusers formed around the other end of the impeller...     

A safety valve for pneumatic tools, comprising first and second valve bodies which are movable relative to each other and which carry cooperating seat surfaces. The first valve body is of tubular shape and is displaceable between a closed and an opened position by means of a lever. The second valve body...     

A separate throttle within each of a pair of air inlet passages for an automobile internal combustion engine comprises a variable restriction diffuser designed for sonic velocity gas flow through its region of maximum restriction throughout substantially the entire operating range of the engine. The...     

A piston in a valve cylinder has an inlet port connected to a source of high-pressure fluid, opening onto a peripheral recess of its piston between two piston heads of like diameter, and an outlet port leading to a load, this outlet port being adjustably throttled by an edge of one of these piston heads...     

The throttle for the air inlet passage of an automobile internal combustion engine comprises a variable restriction diffuser within the passage and designed for sonic velocity gas flow through its region of maximum restriction throughout substantially the entire operating range of the engine. The diffuser...     

A double plug shuttle valve having a pair of valve plugs slideably mounted within a hollow body. A tubular actuator operatively connected to the valve plugs permits fluid communication between a central chamber and two end chambers to allow either balanced or unbalanced operation by proper selection...     

A gate valve operator having dual pistons, one having pilot pressure acting thereagainst thereby tending to open the valve, and one having line pressure acting thereagainst tending to close the valve. The line pressure piston's pressure surface area may be varied to compensate for wells having depleted...     

A slide valve comprising a housing in which a slide is movably guided between two oppositely facing, flat contact surfaces. Communication between fluid passages in the housing is accomplished by hollow formed passage means on the slide. Seal rings carried in grooves in the slide maintain sealing contact...     

A single-ported double-seated valve mechanism is a valve body means with an inlet and outlet communicated by a flow passage and a chamber for receiving valve trim. A bonnet is secured to the valve body means. Valve trim is fixedly secured to the bonnet and positioned within the chamber. The bonnet and...     

A valve of simplified construction, adapted to control fluid of high volume and pressure. The valve plunger is a hollow metal tube, that controls fluid flow by moving radial slots in its peripheral wall back and forth across a seal. The plunger is moved by an air or hydraulic cylinder which is connected...     

A pilot operated hydraulic holding valve includes a poppet valve member which is biased to close by the pressure generated by the load being held in direct proportion to the magnitude of that pressure, thereby eliminating the need for mechanical biasing means and reducing the pilot pressure required...     

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...     

A low noise level valve for controlling high pressure fluid flow between an inlet and an outlet. The valve comprises a poppet movable along a given line with respect to a complementarily formed valve seat. The area between the poppet and valve seat comprises a series of spaced undulations which extend...     

A backflow prevention device is disclosed which includes a pressure differential relief valve. The relief valve includes a lift chamber functioning to accelerate opening of the valve to assure that the valve fully opens once it has partially opened. The relief valve also includes construction features...     

A valve for controlling fluid flow is disclosed in which a fluid outlet is controlled by two separate components, one being tubular in shape and located inside the other hollow component. Both the hollow and the tubular components may either be the valve body and closing element respectively, or vice-versa....     

A valve having a plunger with opposite end sections of equal diameter, a control section of lesser diameter and a valve member. One end section extends from the inlet chamber through a seal to the exterior of the valve, and the other end section extends from the outlet chamber through a seal to the exterior...     

A rapid response valve particularly suited for controlling a jet of fluid of variable duration, the valve having a chamber with a valve seat surrounding a valve orifice, a valve member within the chamber movable toward and away from the valve seat, the chamber having an inlet compartment and an outlet...     

This invention is a specific method for shaping the shank of a hydraulic control valve spool to alter the momentum exchange from high pressure fluid flowing across the spool so as to balance the various dynamic forces acting on the spool. The shank is shaped to turn the high velocity stream away from...     

A fast-acting reliable electrically operated normally opened or normally closed valve includes a piston which is spring-biased open and which is actuable by pressurized actuating fluid to drive a plug against a valve seat to terminate working fluid flow. Operating current is passed through stainless...     

In a refrigeration system for a substantially enclosed space and including a compressor, a condenser, an evaporator, conduit means connecting the said compressor, condenser and evaporator to form a cooling circuit, a hot gas by-pass conduit between the compressor and the evaporator, and means provided...     

Flow control apparatus is disclosed in which a closure element is reciprocated between flow controlling positions by means of a stem which is substantially counterbalanced with respect to forces on the stem due to the pressure of the fluid being controlled as well as ambient pressure conditions.

A spool valve including a valve body having a bore intercepted by at least two axially spaced ports and a spool reciprocally received within the bore and having two axially spaced lands separated by a groove, one side wall of the groove being adjacent one of the lands and defining a shoulder. At least...     

A valve for controlling fluid flow having a cavity divided into first and second chambers by a first bellows carrying a plunger which has one end extending into the valve outlet opening at one wall of the first chamber. A second bellows, co-axial with the first bellows, acts between the end of the plunger...     

A piston-like member slides within a valve body, with one end sealingly engageable against a valve seat communicating with an inlet port. The other end of the piston-like member forms a movable wall of an expansible chamber which, when it expands, moves the member toward valve closure. Preferably, both...     

A valve comprising a housing with an inlet and outlet and a chamber in between, a reciprocating gate mounted in a gate seat disposed within the chamber for opening and closing the valve, an upper bonnet for closing the chamber at one end and a lower bonnet for closing the chamber at the other end, the...     

A pressure-balanced three-way transfer valve for controlling fluid flow into one of two fluid lines includes a pair of cam actuated valves actuated by a single actuator to move a respective valve to an open and closed position. Pressure balancing of the valve rods is accomplished by a fluid passage through...     

A balanced stem gate valve incorporating a slab gate having hard friction resistant sealing face surfaces that cooperate with friction resistant seat assemblies to provide for low operating torque under high pressure conditions. Seat carrier rings are supported within the valve chamber and define seal...     

A gasoline vapor recovery system which includes a gasoline pump, a gasoline dispenser, a gasoline line with a flow sensor in it, and a gasoline vapor line with a pressure responsive valve in it which is operated by differential pressurefrom the flow sensor. The flow sensor is located in the gas dispenser...     

A control valve for a high pressure hydraulic system with a piston slide ch can be moved from a neutral position into a first and, if desired, into a second control position, which makes it possible to effect a connection between a pump connection opening and at least one consumer device connection opening...     

A normally open, two stage solenoid actuated flow control valve having a pressure relief function, in which a poppet assembly comprising a spring biased poppet, a range spring and a spring adjusting screw, controls the communication of balancing fluid pressure to a primary valve member. The adjustment...     

A pressure insensitive, fail-safe subsea valve is disclosed. The valve is manipulator operable for deep water application and does not require conventional diving techniques to install, maintain or remove. The valve is pressure balanced by employing a hollow valve stem which equalizes the pressure on...     

The invention contemplates a valve having particular application to the control of flow and pressure within a sanitary-sewer system which includes independently pumped feeders at elevations below an intervening region of greater elevation. The valve, located at the downstream side of the region, of greater...     

A proportional type electromagnetic valve comprises a flow rate control valve secured to a movable core which moves a stroke in proportion to the input current, and a valve seat portion cooperative with the flow rate control valve to control the flow rate. In addition to a bias spring providing for urging...     

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 normally-open two stage float valve for use with a suction tube leading om a vehicle fuel tank. As the fuel tank begins to run dry it is desired that the float valve close off the tank to the suction force. The valve of this invention includes a float-operated pilot valve element that equalizes forces...     

A very fast acting valve capable of producing a very well-defined plug of gas suitable for filling a theta pinch vacuum vessel is given. The valve requires no springs, instead being stopped mainly by a nonlinear force. Thus, the valve is not subject to bouncing; and the ratio of the size of the valve...     

A control valve with balanced plug for fluid flow control having a cylindrical guide barrel provided with discharge ports, and a coaxial plug which slides in the plug. The plug is balanced through bores which cause the pressure to be the same on opposing faces of the plug and upstream and downstream...     

The valve of U.S. Pat. No. 3,774,877 in which have valve operating pistons are mounted in a tubular sleeve received in a bore in a two part valve body, one part containing the connection for P1 and the other part containing the connection for P2 and the valve port.

An electromagnetic valve actuator has two sets of exciting coils and movable cores and a rod having an end secured to the first movable core. The other end of the rod extends slidably through the second movable core which is connected to a valve member cooperative with a valve seat to control a fluid...     

Two identical check valve assemblies are connected in series with a zone between them. A differential control valve vents this zone to atmosphere whenever the downstream pressure approaches the upstream pressure within a predetermined magnitude. The action of the differential control valve is responsive...     

A solenoid operated valve is provided particularly constructed to decrease friction in the course of operation and thus of the hysteresis or actuating lag effect. The general construction utilizes a solenoid acting to maintain closure of a valve by pulling on an armature to which is integrally secured...     

A pilot operated relief valve for use on medium and high pressure vessels, conduits and the like. A two-stage, non-flowing valve (5) operates a main relief valve (7) of substantially greater capacity. Flow control elements provided by (35), (36), (38), and (39) associated with the first stage poppet...     

An electromagnetic flow control valve assembly includes a valve body having first and second ports and a valve member for controlling fluid communication between said first and second ports. An annular diaphragm is connected at its inner periphery to the valve member and at its outer periphery to the...     

A valve includes a sleeve having a water inlet and a water outlet. There is a stem movable within the sleeve to control the flow of water from the inlet to the outlet. A pressure member is positioned within the sleeve and coaxially arranged with the stem. The pressure member is fixed relative to the...     

In combination with a flow control valve assembly, an electromagnetic motor assembly includes a stationary core surrounded by a solenoid coil at its small diameter portion, a yoke member coaxially spaced from the stationary core and having an axial hole coaxial with the small diameter portion of the...     

A fluid control valve fluidly connected between a source of fluid pressure and a fluid operated device for controlling the pressurization and depressurization of the fluid device. The control valve comprises an elongated housing having an inlet port and an outlet port formed at one axial end of the housing...     

A pneumatic valve is disclosed in which a slide or spool is longitudinally shiftable between two operative positions. The slide is positioned within a body chamber with substantial clearance, and is laterally located within such chamber by elastomeric seals. A balanced valve system is carried by the...     

A new and improved valve apparatus having an operating mechanism sealed in such a manner that the fluid pressure urging thereon produces offsetting or balancing forces to enhance ease of valve operation. To accomplish the force balancing, the flow closure means is continuously sealed to the valve housing...     

A fluid flow control valve has a body enclosing a transfer passageway whose bounding surface is profiled to provide streamline flow conditions. The passageway is constricted by means of a piston-like valve moving transverse to the direction of fluid flow. A profiled shield protects the valve from direct...     

A high force-gain valve including a housing having first and second openings therein, a fluid diverter fixed in position within the housing and aligned with the second opening, a translatable gate closely surrounding the diverter and having a sealing edge which in the closed position seats against the...     

An electromagnetic valve unit wherein a solenoid coil is assembled within a motor housing in surrounding relationship with a stationary core, a yoke member is fitted at its outer periphery to the corresponding fitting faces of the motor housing and a valve housing, a spring-loaded shaft is slidably supported...     

An improvement in ball-type check valve arrangements including a valve body in which is formed a fluid passageway and a valve chamber communicating through a valve seat in the chamber, a ball in the chamber seated in the valve seat, and a reciprocal retaining member having a head engaging the ball in...     

A multi stage valve (1) having a valve member actuating mechanism located on the wide side of the valve member; (2) having a valve member and seat equipped with plural steps of increasing diameter in an upstream direction; (3) wherein the steps are configured so that a straight line can extend between...     

A hydraulically actuated fast action gate valve for gating highly viscous uids in a salt water environment includes front and back plates having openings for connection to conduits containing the viscous fluid and a center plate having a slot for receiving a slidable gate that includes an optional check...     

Disclosed herein is a directional control valve used to control the interlocking, stop, acceleration, deceleration of an actuator and the acting direction thereof in hydraulic circuit. This directional control valve comprises slide valves of plate-type slidably inserted to a tank chamber within a casing;...     

An incrementally adjustable electronic expansion valve for precisely controlling refrigerant flow through the valve is disclosed. Basically, the expansion valve includes a stepper motor, a sleeve member, and an orifice assembly. The sleeve member is incrementally moved over a slot(s) in the orifice assembly...     

A piezo-type valve with piezo-elements as a valve actuator. The piezo-elements are interposed by two freely movable pistons. A pressure chamber is formed on the outer side of one of the pistons to limit its outward movement. Thus, the substantial part of the expansion of the piezo-elements is transmitted...     

A hydraulic control valve having a piezoelectric actuator comprises an expansible sleeve loosely received within a bore of the valve housing, with one end thereof being fixedly or stationarily mounted relative to the housing and the other end thereof being expansibly mounted within the bore. A slidable...     

A solenoid operated, direct acting, poppet style two-way valve wherein the fluid pressures on the valve member are completely balanced, a low power electrical signal is required to control its opening and the design features are such as to permit a valve of minimum size and which can be manufactured...     

A three-way solenoid valve uses a movable armature housed in a coaxial sleeve and having longitudinal fluid channels on its outer surface and a fluid sealing element on both ends. A first fluid sealing element on a first end of the armature is a resilient ring arranged to cooperate with an adjacent fluid...     

A flow-control valve assembly particularly useful in fire fighting apparatus comprising a contoured valve seat mounted axially within a valve body and a balanced tubular valve member reciprocably movable in the valve body coaxially with said valve seat for providing proportional flow control, manual...     

An electronic expansion valve comprising a stepping motor, motion conversion member for converting the rotational motion of the stepping motor to a screw motion, a valve pintle coupled to the motion conversion means to be rectilinearly displaced and having pistons at both ends of the valve pintle, of...     

A system for automatically levelling a vehicle, such as a recreational vehicle, relative to gravity includes a plurality of extensible jacks, preferably hydraulic, disposed at strategic positions on the bottom of the vehicle. A plurality of switches sense the downward tilting of the vehicle relative...     

A valve device for insertion in the fuel line of an internal combustion engine between the engine and the fuel pump therefor and adapted to impede the flow of fuel to the engine in response to a reduction in pressure in the lubricating oil system for the engine. The device is insensitive to variations...     

A refrigerant flow rate control device for the refrigeration cycle of an air conditioning system of an automotive vehicle which is driven by a vacuum actuator includes a communication passageway for equalizing pressures applied to opposite ends of a valve body. The valve body has an intermediate portion...     

The shut-off valve (1, 40, 85) comprises a valve housing (2) having at least two chambers (3, 4, 5) adjoining one another in axial direction. The chambers are communicating with one another through a passage bounded by a valve seat (6, 7). A valve body (15) is axially movable in the housing and co-operates...     

A control valve in which a surface of a valve seat closer to a valve body is formed so as to be flat. A valve head corresponding to an annularly formed fluid-communication passage is provided with an annular inner convex projection and an annular outer convex projection. These projections engage with...     

A self-closing connector in accordance with the invention comprises at least one duct, at least one end orifice, and a sliding valve plate for closing said orifice, the connector is essentially characterized by the fact that said orifice (11, 28, 29, 32) is delimited by at least two lines of sealing...     

An orifice controlled poppet valve includes a pilot poppet pressure balancing arrangement which prevents fluid leakage between the valve inlet and outlet. The pressure balancing arrangement includes a pin slidable in a passage in the main valve member, which passage extends between the inlet and a pilot...     

A split gate for a gate valve regulating fluid flow with reduced gate drag. The split gate comprises a plurality of members for sealing a flowway intersecting a valve chamber. A first member seats against a first portion of the flowway and has a pressure-balancing surface pressure-isolated from the first...     

A sanitary valve assembly for controlling the flow of hot and cold water, which includes at least two superimposed annular control elements arranged and constructed to provide at least two passgeways therethrough with a control lever operable coupled to one of the control elements for proportioning both...     

A fluid control valve apparatus comprises logic valve means including a valve housing, a first valve member defined in the valve housing, and an axially movable valve body arranged in the first valve chamber, with the valve body including opposite end portions and a conical surface portion brought into...     

A sealing ring device is provided for a fluid valve having a piston (2) reciprocating within a cylinder (1), wherein the piston (2) includes a valve cone (2c) adapted to contact a valve seat (11). In order to seal the inner space of the cylinder (1) located behind the piston (2) from an inlet/outlet...     

A system for automatically levelling a vehicle, such as a recreational vehicle, relative to gravity includes a plurality of extensible jacks, preferably hydraulic, disposed at strategic positions on the vehicle underside. Switches sense the downward tilting of the vehicle relative to gravity at the strategic...     

The piloted valve has three abutment surfaces for controlling the positions of the pilot lid and main lid. The abutment surfaces are disposed relative to each other so that the maximum stroke of the pilot lid relative to the casing is greater than the maximum stroke of the pilot lid relative to the main...     

A pulse-width-modulated solenoid valve has a body provided with an elongated chamber. The body has inlet and outlet openings communicating with the chamber, and has a seat surrounding the inlet opening and arranged to face into the chamber. An armature is mounted in the chamber for movement therealong...     

A fluid flow regulator including a servo valve assembly and a throttle valve assembly. The servo valve assembly includes a pair of double acting actuators, biased in one direction by an adjustable spring, contoured ports and piping passageways to the ports and to other chambers of the assembly. The actuators...