Abstract: An apparatus for de-gelling a liquid mixture in accordance with the present invention includes a device interposed in the flow of the solution for agitating the solution, the agitation sufficient to substantially de-gel the solution. The device for agitating may include a valve which has a chattering motion on opening and closing to agitate the solution; a bead chamber containing closely packed beads through which the solution must pass to reach an outlet, or both the valve and bead chamber.

Abstract: In a fuel delivery system that includes a pump for supplying fuel under pressure from a supply to an internal combustion engine, a check valve is positioned between the pump and the engine for preventing back-flow of fuel from the engine to the pump. The valve has a flow passage with a central axis and a valve seat orientated away from the pump. A valve element is positioned within the passage for axial motion against a coil spring as a function of fuel pressure from the pump. The coil spring is captured in compression between the valve element and a guide positioned downstream of the valve element within the flow passage. A stem that extends axially from the valve element is slidably disposed in a central bore in the guide. An orifice couples the bore to the fluid flow passage. The guide and valve stem thereby not only restrain lateral motion of the valve element within the passage, but also form a piston/cylinder construction that cooperates with the orifice to dampen axial motion of the valve element.

Abstract: Resilient accommodation of vacuum brake booster check valves to vacuum source-generated pressure pulses tending to cause the valves to pulse open and close is accomplished by providing a resilient annular area in the check valve radially between its axial center and the area where it sealingly engages a valve seat when closed to inhibit valve pulsations and resulting valve noises generated by pulsations from the vacuum source.

Abstract: An adjustable pressure relief valve is disclosed comprising a valve body having an inlet and an outlet, a spherical valve seat associated with the inlet, a valve member having a mating spherical sealing surface configured to seal off the flow of fluids through the valve at the valve seat, a huddling chamber around the periphery of the mating spherical sealing surface, an adjustment screw supported in the valve body to allow rotational but not longitudinal movement of the adjustment screw with respect to the valve body, a compression member connected to the adjustment screw and mounted within the valve body which moves longitudinally with respect to the adjustment screw when the adjustment screw is rotated and a resilient member biased between the compression member and the valve member. In the preferred embodiment, the mating spherical sealing surface is provided by staking a spherical ball inside a cavity in the valve member, leaving portion of the ball exposed.

Abstract: An anti-fluttering valve construction includes a valve member with integral stem received in an oversize cylindrical bore in a guide which can give rise to fluttering of the valve member when it is unseated. To avoid fluttering, the guide at one or both ends of the bore is segmented and a spring surrounds the free ends of the segments to deform them inwardly to define a conically inwardly tapering portion of the bore which makes highly localized contact with the valve stem.

Abstract: An air valve for a baby bottle that fits in the side of the baby bottle. A valve is disposed interior of an air pressure-sensitive diaphragm to permit air to enter the bottle when liquid is removed.

Abstract: A value opening air flow control ring requires the poppet to travel a controlled distance off the poppet seat to obtain substantially unrestricted air flow, the restricted flow occurring during air flow pulsations which acts to inhibit valve pulsations and resulting valve noises generated by pulsations from the vacuum source. The control ring also causes directional air flow past the poppet, particularly in the early part of the valve opening sequence while the restricted flow is occurring, causing a side bias on the poppet which decreases as the poppet moves toward its fully open position, the side bias being substantially eliminated by the time the poppet reaches its fully open position. The side bias action is reversed in the valve closing movement from the fully open position. The side bias further inhibits valve pulsations which might otherwise occur as the valve tends to move from the closed position to the open position and vice versa in response to vacuum source air flow pulsations.

Abstract: A high flow vacuum check valve incorporates a plurality of rubber dampening feet located on the sealing bead side of the valve poppet. The feet extend axially slightly beyond the sealing surface of the sealing bead so as to have an axial compression interference, the feet first engaging the valve seat as the valve poppet moves from its open position toward its closed position, and then compressing as the valve poppet continues its movement until the valve is fully closed with the sealing bead in full sealing engagement with the valve seat. This interference compression causes the feet to perform as rate changing springs so long as they are compressed to any extent, dampening axial movements of the valve poppet, and also act as stabilizing members on the valve poppet in the lateral plane. The feet may also be constructed with tiers which also contribute to the stability of the valve poppet.

Abstract: A pressure relief valve in a cryopump is preceded by a filter element in a filter housing. The filter element is springloaded so that the filter element itself provides pressure relief with clogging of the filter. The housing may have a removable end cap. The filter is spring biased by a spring between the housing end cap and a filter end cap.

Abstract: A check valve with a shaped outlet port and interior fluid passage provides a valve with improved fluid flow characteristics.

Abstract: An adjustable pressure relief valve is disclosed comprising a valve body having an inlet and an outlet, a valve seat associated with the inlet, a valve member configured to seal off the flow of fluids through the valve at the valve seat, an adjustment screw supported in the valve body to allow rotational but not longitudinal movement of the adjustment screw with respect to the valve body, a compression member connected to the adjustment screw and mounted within the valve body which moves longitudinally with respect to the adjustment screw when the adjustment screw is rotated and a resilient member biased between the compression member and the valve member. In the preferred embodiments, a connection between the adjustment screw and the valve member aligns the valve member with the valve seat. Also, the adjustment screw provides an unchanging stop surface to limit the lift of the valve seat as well as inside diameter guiding to prevent buckling of a helical spring used as the resilient member.

Abstract: A manifold fitting for a compressed air tank having an elongate main body of hexagonal cross-section with first and second ends, the first end being of reduced circular cross-section, the body having an axial passage extending from the first end toward and terminating short of the second end. The first end is externally threaded for attachment of the fitting to a tank for communication with the tank via the passage. The body has a lateral opening extending inwardly from a one of its six faces to said passage and a pressure relief safety valve at the lateral opening in the body. A passage extends across the body and intersects the lateral opening.

Abstract: A pressure activated valve apparatus for axial in-line positioning within sanitary systems, such as steam lines for food processing, in which the entire apparatus, including the spring biasing and valve elements are positioned within the flowing media. The spring biasing element is protected from contact with the flowing media, through the use of a sealed fluid-dynamic cover so as to allow the passing media to flow over it with a minimum amount of resistance. The entire apparatus is connected to an incoming and an outgoing conduit so as to enable easy removal for replacement or maintenance purposes, with a minimum amount of cost and effort. A fluid-dynamic cover is fitted over portions of the valve assembly to isolate same from the fluid itself, while being removable to enable facilitated replacement or maintenance of the internal valve actuation parts.

Abstract: A plunger for a check valve and a method for constructing such a plunger. The preferred plunger has a shell of P.T.F.E. sealingly secured to a rigid, metal disk. The cavity between the shell and the disk is filled with a silicone rubber material which, together with the shell, provides a resiliency that enables the shell to conform to irregularities in its mating valve seat even when the seating pressure is low. The shell preferably has an outwardly bowed, tapered sidewall for providing a circumferential line contact with a frustoconical valve seat. In accordance with the method, the shell begins as a sheet that is hot molded around the pre-formed rubber silicone, and the outer edge of the shell is inserted into a groove in the disk to envelope the filler material. The outer diameter of the disk is reduced to sealingly capture the shell edge, thereby forming a unitary structure.

Abstract: A valve head of the pressure relief valve is urged into the closed (seated) position by a spring, assisted by a force derived from pressurized fluid which is situated in a chamber behind the valve head and which is admitted thereto from the upstream side of the valve seat through a chamber in the valve head. The chamber in the valve head is open toward the inlet port of the valve and is partly defined and surrounded by a skirt-like extension oriented transversely to the axis of the valve inlet port. The diameter of the chamber whose opening has a plane generally perpendicular to the direction of valve head motion, is at least as large as the diameter of the valve intake port. In the seated (closed) state the skirt-like extension reaches transversely into the inlet port at least as far as the axis of the inlet port and in the maximum open position the skirt-like extension is at the most just clear of the inlet port.

Abstract: A pressure relief valve in a cryopump is preceded by a filter element in a filter housing. The filter element is springloaded so that the filter element itself provides pressure relief with clogging of the filter. The housing may have a removable end cap. The filter is spring biased by a spring between the housing end cap and a filter end cap.

Abstract: Shutoff valve apparatus includes a spring-loaded piston with two guide portions disposed in bores and the piston includes a fluid passage extending through the piston and communicating with one of the bores in which a guide element is disposed. Any back pressure works with the bias of the spring to help seat the valve piston to prevent fluid from leaking past the valve. Positive pressure from the working fluid opens the valve.

Abstract: A hot melt foam adhesive system including a gear pump wherein gas is mixed under pressure into the molten adhesive and is driven into solution with the adhesive. The gas is supplied to the pump via a one-way check valve operative to prevent the back flow of molten adhesive to a gas flow control valve, regulator, and gauge. The check valve is positioned above the level of the pump so that molten adhesive cannot flow by gravity into the check valve. The check valve is so constructed that it is biased into a closed position by a spring on the gas side of the valve so that adhesive cannot collect around and foul the spring of the valve.

Abstract: A combined dispensing and safety valve for use in syphons for foamed cream has a housing which constitutes a cover for the bottle of the syphon and receives a tiltable or reciprocable valving element of the dispensing valve. This valving element has an axial passage for the reciprocable valving element of the safety valve which opens when the pressure in the bottle reaches a preselected threshold value. The axial passage has a smaller-diameter section for the shank and a larger-diameter section for the head of the valve element of the safety valve. The seat for the valving element of the safety valve can be defined by a detachable cup of the valving element of the dispensing valve or by the surface surrounding the smaller-diameter section of the axial passage. The valving element of the safety valve is biased to its operative position by a coil spring which is installed in the larger-diameter section of the axial passage.

Abstract: A valve mechanism especially suited for use in the inlet and outlet conduits of a hot water heater system comprises a pair of cup shaped metallic members positioned within the respective conduit in telescopic relationship to each other with a coil spring concentrically disposed between the outer cylindrical surface of the inner cup shaped member and the inner cylindrical surface of the outer cup shaped member. An annular flange formed integrally with the inner cup shaped member is clamped between two casing members forming the valve body at the intersection of the two casing members and a screw bolt extends longitudinally and centrally within the valving cavity with the screw bolt clampingly secured at its upstream end to the end wall of the outer cup shaped member and carrying a washer at its downstream end which coacts with the end wall of the inner cup shaped member to open and close the valve.

Abstract: A relief valve adapted for use with either a liquid or gaseous flow stream and comprising a body having a cage member secured thereto and housing all of the working elements of the valve, the cage member being readily removable from and engagable with the body for converting the valve from liquid to gas installations and also removable from the body without disturbing the installation of the valve in a flow line, fluid containing vessel, or the like.

Abstract: In a plunger-type oil well pipe float valve assembly permitting well fluid flow in a downward direction by a valve stem supported valve seating and unseating on a valve seat, the valve stem reciprocates in a stationary valve stem guide sleeve which supports one end portion of a coiled expansion spring surrounding the valve stem and seated at its other end on a spring retainer adjacent the valve which normally biases the valve closed. Extensions are formed on the confronting end surfaces of the spring retainer and valve stem guide sleeve for interdigitated engagement when fluid flow in a downward direction biases the valve open for preventing fluid stream induced angular rotation of the valve and its stem relative to the valve stem guide sleeve.

Abstract: A differential fluid pressure indicator including a bypass valve which provides an indication that the filter is in the bypass condition. The bypass valve includes a differential area piston which includes at the outlet port thereof a restriction orifice adapted to insure a predetermined stroke of the poppet in the bypass valve, thereby to insure actuation of the indicator.

Abstract: The present invention provides a fluid handling device which operates as a combination check valve and fluid flow meter. The device includes a housing having an inlet and outlet and a fluid passageway formed therebetween. The housing forms a valve seat in series with the fluid passageway while a valve member movable between an open and closed position cooperates with the valve seat to open and close the fluid passageway. A tapered surface on the valve member forms a variable area opening at the valve seat which increases in area as the valve member moves from its closed and towards its open position while a compression spring urges the valve member towards its closed position. An indicator needle is mechanically connected to the valve member and reduces an exteriorly visible signal of the position of the valve member which, in turn, is representative of the fluid flow rate through the device.

Abstract: The invention relates to a stop which is locked in position a bore of an operative device as well as to a device provided with at least one such stop. The stop is adapted for use particularly with, but not exclusively, with a safety valve. The stop includes a skirt adapted to be received in a bore and having at one end (29) by which it is connected to a centering dish (26), a diameter which adjusts itself practically without play in the bore (30) designed to receive the stop. At a second free end (31) the skirt has a diameter prior to positioning in the bore which is larger than that of the bore (30) intended to receive the stop so that, during the assembly, the skirt is compressed by the walls of the bore and thereafter, by reaction, it is forcibly pressed against the walls of the bore (30).

Abstract: A thermally responsive slam shut valve assembly includes a generally tubular body member having an internal valve seat at one end, a spider member connected to the other end of the body member, a cup shaped valve inside the body member, a valve stem connected to the valve and extending through a central opening in the spider member, a coil spring surrounding the stem between the valve and the spider member, and fusible means surrounding the stem outside the body member for preventing the valve from moving into sealing contact with the valve seat until the temperature of the fusible means goes above a predetermined threshold.

Abstract: A safety valve has movable and immovable valve elements, and a friction unit arranged therebetween for damping vibrations, wherein the friction unit has a plurality of friction members movable radially relative to a valve axis, a pressing member arranged to move the friction members so that their friction surfaces are pressed against a friction countersurface of a movable valve element of the movable valve means and for abutment against a stationary abutment member at their side facing toward a valve closing member, and a pretensioned auxiliary spring acting upon the friction members at their side facing away from the valve closing member and in a valve closing direction, wherein the auxiliary spring has such force and such a smaller resistance that in the event of seizing of the friction members with the movable valve element, the auxiliary spring is compressed within a predetermined opening pressure which does not considerably exceed a response pressure over approximately a valve stroke.

Abstract: A fluid of lower density is dispersed in a jet of a fluid of higher density, by imposing on the jet of higher density a curved trajectory. Where the pressure is the highest, that is, where the wall that establishes the curved trajectory has its largest radius of curvature, the fluid of lower density is introduced, preferably under pressure. The apparatus can be embodied as a tuyere which is a figure of rotation, when only a relatively small proportion of lower density fluid is to be introduced. When the proportion of lower density fluid is greater, however, then the device can be embodied as a duct of quadrangular section wrapped in a helix with narrow slots for the introduction of the fluid of lower density formed in its outer wall.

Abstract: An insulator device which couples a metallic gas delivery tube to a line leading to a detector device which requires cooling gas for operation. The insulator device of the present invention comprises a molded dielectric insulator, molded about two separated metallic end components, each of the metallic components including a nut portion to allow the insulator to be connected, on one hand to the detector device line, and on the other hand to the metallic gas delivery tube. The two metallic components are separated by a gap in order to provide the necessary electrical isolation between the two metallic end components. One metallic end component includes a built-in check valve which permits gas to flow only in the desired direction while preventing gas flow in the opposite direction.

Abstract: This invention relates to a valve assembly for a pressure-cooker in accordance with the preamble of claim 1.

Abstract: A panel mounted control valve including a housing having a bore with a valve seat formed in the bore. An axially and rotatably movable actuating member which has a valve member thereon is mounted in the bore for movement therein. A nut member is threadably mounted on an end portion of the actuating member and moves axially to compress or decompress a spring which biases the valve member to closed position. A slot is formed in the housing and the walls of the slot are located adjacent opposed flat portions on the nut member to prevent the nut member from rotating but permitting it to move axially.

Abstract: Diverter valve for preventing blow-outs in oil wells during the early stages of drilling. The diverter valve has a simplified construction which reduces maintenance problems during use in the field.

Abstract: A cartridge valve in which parts made separable for convenience of manufacture and for a use of different materials within the same assembly are interconnected for unitary installation and removal.

Abstract: An exhalation valve for inhalation therapy includes a base member provided with an exhalation port encircled by a valve seat for a valve closure disc, the center of which is connected to the inner end of a pin extending outwardly away from the disc and slidably mounted in a sleeve spaced from the disc. The sleeve is held rigidly by a support connected with the base member. A number of Constant-Force Compression coil springs extend between the sleeve and disc and are bowed outwardly away from the pin. The ends of the springs are connected with the sleeve and closure disc to urge the disc toward the valve seat. The springs exert a substantially constant pressure against the disc as it is moved outwardly away from the valve seat by air flowing out through the valve port.

Abstract: An automatically regulated constant-pressure fire-fighting nozzle having a pressure-responsive baffle element for adjusting the size of the discharge orifice in response to supply pressure changes. An upstream-directed baffle extension in opposition to the direction of fluid flow for creating a low-pressure zone adjacent said baffle element in response to high supply volume to modulate the effective displacement force acting on the orifice-regulating baffle element. The extension also serving to adjustably restrict the fluid flow passage to said orifice in response to pressure-induced displacement of said baffle element.

Abstract: A vacuum breaker for use on a moving tank for allowing atmospheric air to enter the tank to relieve a reduced pressure condition in the tank. The vacuum breaker has a light-weight closure assembly including a closure member of relatively large area. The closure assembly is normally held closed by permanent magnets. The magnets and the light-weight construction of the closure assembly substantially prevent the vacuum breaker from opening due to vibration of the moving tank. However, the vacuum breaker opens readily in response to a relatively slight reduced pressure in the tank because of the large area of the closure member. The permanent magnets are shielded from undesirable proximity of ferrous objects to prevent the magnets from being drained. The vacuum breaker may be opened manually to test for a positive pressure condition in the tank.

Abstract: A check valve having a predominantly cylindrical housing, a sealing diaphragm comprising a thin, tubular slip and at one extremity a radially outwardly extending fastening flange, said flange being clamped between an uninterrupted inner shoulder in the housing and an annular locking member of a synthetic resin, having an outer surface being at least partly tapering, said locking member being enclosed between the fastening flange and an inwardly projecting protuberance of the housing, and a rotation symmetrical closing member being axially displaceable between a closing position sealing on the slip and an opened position away from said slip.When assembling the component parts of this check valve the diaphragm is first installed and thereafter the locking member is forced in position by an axial movement only.

Abstract: A unique relief valve is provided for use with a fluid system and comprises a reducing bushing having a throughbore. The bushing is externally threaded for connection with a standard fluid connector and, similarly, is internally threaded around its throughbore for connection to a further fluid connector in the fluid system. A valve seat having a fluid passageway is secured to the bushing while a valve member cooperates with the valve seat and is movable between open positions and a closed position. In its closed position, the valve member closes the fluid passageway on the valve seat and thus prevents fluid flow through the reducing bushing while, conversely, with the valve member in its open positions, fluid communication is established through the reducing bushing throughbore. A helical spring abuts against the valve member at one end and, at its other end, against a spring seat and urges the valve member towards its closed position.

Abstract: A fluid pressure operated clutch which transmits torque from an engine output shaft to a transmission input shaft, including a rotatable flywheel connected to the output shaft, an adapter connected to the flywheel for rotation with the flywheel, the adapter having a first annular plate with a fluid passage near the inner periphery of the plate, and a centrifugal piston which defines with the adapter a fluid chamber supporting a rotatable torus of hydraulic fluid. The piston has a second annular plate, slideable with respect to the first plate, and a second fluid passage near the outer periphery of the second plate. The first and second plates, at their inner peripheries, provide a controlled clearance to vary the rate of hydraulic fluid into the first fluid chamber as the second plate slides.

Abstract: A power steering gear having a piston nut fed with pressure fluid from a source through a rotary valve. The construction includes a special one-way valve assembly in the high pressure port which is formed by a plunger which seats into the end of the steel tube of the power steering hose. The plunger tube and external O-ring provides for improved sealing of the power steering gear to prevent external leaks and to provide for improved control of flow into the housing from the source and to block flow from the housing into the high pressure port so that road excited vibrations are not fed back to the vehicle handwheel.

Abstract: A first and second check valve operated independently in a conduit section and having first and second valve stems on a common axis with first and second valve seats and cooperating normally disposed valve plates with the valve stems inclined away from the direction of flow, the second valve seat being larger than the first valve seat and the lowermost level of the second valve seat is at least below the lowermost level of the lift of the first valve plate with a single removable cover on the conduit section for securing the check valve in position.

Abstract: A liquid discharge nozzle having a pressure-responsive movable baffle element overlying the discharge opening and displaceable by fluid pressure in opposition to spring-loading. An open-ended cylinder houses a piston out of the path of liquid discharge flow, which piston presents a pressure surface in opposition to the pressure responsive surface of the baffle to modulate the effective action of the spring as the discharge volume increases.

Abstract: A pressure relief valve for attachment to a tank, such as used on an electrical transformer, which valve will release excessive gas pressure developed in the tank because of transformer malfunction. The valve has a cap which uncovers a signal indicating portion of the valve when the valve is unseated during a pressure release operation. The cap remains in signal uncovered position, after the valve resets, to warn maintenance personnel that the tank has had an excessive pressure condition.

Abstract: A pressure regulating valve is disclosed as including a valve seat having a flat working surface and a central inlet bore extending perpendicularly from the flat working surface through the seat. A valve disc having a flat circular working surface, the diameter of which is at least three times as large as the diameter of the inlet bore, is positioned against the seat in a coaxial relationship with the inlet bore to provide a large annular area of contact with the flat seat surface. The disc is biased toward the seat by an assembly including a spring within a spring housing, a piston, reciprocally engaged in the innermost end of the spring housing, and a ball bearing received in opposed recesses in the seat and disc. When subjected to high pressure bypass flow through the valve seat inlet bore, the disc is forced from the seat and attains a stable, parallel orientation relative to the seat under the influence of the bypass flow.

Abstract: A backflow prevention device is disclosed which includes a spring operated check valve and a shielding member for protection of the spring from transverse fluid flow disturbances. The shielding member is preferably cylindrical in shape and surrounds the spring longitudinally about 40% to 90% of the extended spring length.

Abstract: A refrigerant flow control assembly for metering the flow of refrigerant, under low load and normal operating conditions, from the high pressure side to the low pressure side of refrigeration machine. The assembly includes a valve plate defining a circular port for the flow of refrigerant therethrough. A valve plug is provided having a conical surface at one end for communication with the circular port, and a stem at the other end. A valve plug support is operatively connected to the valve plate for mounting thereon the valve plug for slidable movement between a closed position and an open position along a line coincident with the axis of the valve plug, which line is perpendicular to and intersects the plane of the circular port at its center.

Abstract: A check valve comprises a housing defining a valve seat thereon and a valve member reciprocally mounted in the housing to normally engage the seat for blocking fluid flow therepast. Two pairs of split retaining members are mounted in axially spaced relationship on a stem of the valve member and are expanded axially thereon by a compression coil spring for biasing the valve member to its closed position. A stop member is secured on an end of the stem of the valve member to prevent movement of one pair of the retaining members therepast. A slot is formed axially through the stop member and extends partially in the stem of the valve member to expose an end of the spring.

Abstract: A fuel injection nozzle for engines or the like, including a nozzle barrel and device for delivering fuel to the interior of the barrel. A fuel delivery port is disposed on one end of the barrel and a poppet valve seat is located on the end of the barrel concentric with the port. A poppet valve is seatable against the valve seat to close the port and a valve stem extends through the port into the barrel and has the poppet valve mounted on one end. The port serves as a guide for the stem for reciprocating movement of the stem within the barrel and there are provided a plurality of angularly spaced, longitudinal grooves in at least the valve stem.

Abstract: An improved relief valve of the type responsive to a predetermined thermal and/or pressure condition. The valve includes a valve body having an inlet, an outlet, an internal passage interconnecting the two, a valve seat about the passage and an opening coaxial with the valve seat, a poppet valve within the body, including a stem extending towards the opening and having a pressure responsive surface directed toward the inlet side of the valve seat, a closure disposed within the opening and having a central aperture slidably and sealingly receiving the stem, the closure being formed of a thin, relatively ductile material and having an outwardly extending lip frictionally captured by the body about the opening and sealingly engaging the body thereabout, the closure further including an annular convex ridge inwardly of the lip and within the body and a central pedestal directed oppositely of the ridge.

Abstract: A pressure-relief valve device has a housing with bores for admitting and discharging pressure fluid. The fluid admitted to the housing passes via a hollow member or sleeve to a valve inlet. The sleeve has at its upper end a chamfered seating surface for engaging with a sealing surface of a valve member and these surfaces form the valve. The valve member has a head with the sealing surface at its periphery and a stem which is guided within the sleeve. The stem is axially and circumferentially grooved to allow pressure fluid to pass through the housing to flush dirt away from the valve inlet even while the valve is closed. Opposed spring forces bias the surfaces of the valve together and a stop member limits the movement of the sleeve. The spring or springs acting on the valve member engage on a support member and this support member engages via a punctiform contact with a thrust piece.