Abstract: A novel pressurized fluid delivery system which has a single fluid inlet block for each plunger of a pump assembly and with an individual fluid inlet manifold and an individual fluid discharge manifold coupled by a valve body assembly to the fluid cylinder block. The three individual units, the fluid inlet manifold, the fluid outlet or discharge manifold, and the fluid cylinder block, are small in size and weight when compared to the single large fluid cylinder block of the prior art and thus are much less expensive to manufacture and are easier to handle. The novel valve assembly is less expensive to manufacture, has a lower restriction to fluid flow than prior art comparable valves and requires less suction feed pressure than the prior art valves.

Abstract: A self-cleaning pressure relief valve has a spring-biased valve closure with an annular contact edge which makes contact with an o-ring to seal the valve. The annular contact edge is slightly larger in radius than the central radius of the o-ring so that changing pressure on the closure causes the contact edge to slide along the surface of the o-ring.

Abstract: A check valve for use in an oral inflation valve has an articulated connection between the valve head and valve stem. The valve stem has a trailing end in the form of a spherical ball and a socket carried by the valve head rotatably receives the ball so that the valve head may skew about an axis of articulation when the valve is open. The trailing end of the valve body is flat and the mating surface of the valve head is flat so that the head seats squarely on the seat when the valve is in repose. The flat trailing end of the valve body is coincident with the axis of articulation. In a second embodiment, the ball and socket are not spherical, but are of frusto-conical configuration to facilitate assembly of the device.

Abstract: A pumping apparatus comprises a piston/cylinder assembly mounted between two laterally spaced end cap sections attached to base means and including spring-loaded valve devices. A piston rod is movably supported in and extends outwardly from one of the end cap sections. A manually operated linkage mechanism effects axial longitudinal movement of the piston rod and a support mechanism maintains longitudinal axial alignment of the piston rod during its longitudinal axial movement. The longitudinal movement of the piston rod operates in concert with the spring-loaded valve devices to pump fluid manually when the pumping apparatus is positioned in any angular disposition with respect to the horizontal.

Abstract: A valve device comprises a vertical, tubular housing, a vertical valve member in the housing, and a coil-form compression spring encircling the member and urging it upwardly against a valve seat in the housing lower end. The member includes an upper, obturating portion and a lower, closure portion and its internal surface includes an upper annular part which diverges downwardly at a gradually increasing angle away from the location of the obturating portion in the valve closed condition. The internal surface includes a lower annular part converging downwardly at a substantial angle to the housing axis and situated directed radially outwards of the spring. Below the seat is an outlet mouth encircled by a rim, the closure part having a bottom lip at such clearance relative to the rim that, shortly before the closure part seals against the seat, the rim and the lip act shearingly upon liquid therebetween. The member includes three guiding fins in sliding contact with the internal surface.

Abstract: A liquid filter as disclosed which includes a housing in which a filtering media is disposed. A relief valve permits the liquid filtrate to bypass the media when the pressure differential across the media exceeds a predetermined level. The relief valve includes a valve member consisting of a valve disc from which four legs extend. The valve closure spring engages the legs to maintain the valve closed until the pressure differential attains a predetermined level. The legs are designed so that only two of the legs engage the spring during normal operation of the valve. Accordingly, the other two legs remain unstressed by the valve spring, but can engage the edge of the valve aperture in case of failure of one or both of the other legs to prevent the valve member from falling into the liquid filtrate, thus blocking the flow of liquid filtrate to the engine, causing catastrophic failure of the engine.

Abstract: In a check valve wherein a possible malfunction resides in a thread pipe end being seat too far into the valve housing in a position to make a contact with the movable head or poppet of the valve and thus undesirably close the valve, vanes are provided in certain locations on the head or poppet that will themselves to contact the pipe end under pressure conditions and provide flumes for the fluid to flow through, in spite of the condition stated.

Abstract: A pressure relief assembly arranged in the upper central region of a container for carrying liquids under pressure. The pressure relief assembly is provided in a hole in the container and includes a cylindrical housing having one end closed off and provided with an opening for a pressure relief valve. The pressure relief valve is mounted on a mounting plate which has a diameter greater than the hole provided in the bottom wall of the cylinder. A tube element is welded to the container about the opening to which the cylindrical housing of the pressure relief assembly is attached through the provision of a circumferential mounting flange. A cover may be provided over the cylindrical housing of the pressure relief assembly to protect the assembly from weather.

Abstract: There is disclosed a vacuum assembly including a manifold housing having one port in fluid communication via a conduit with the suction side of a pump and wherein a user site is in fluid flow via a conduit with another port or the manifold housing and wherein a vacuum relief valve assembly is positioned within the manifold housing and includes a valve disc of a spring loaded valve disc assembly in line contact with a bevelled valve seat of a valve body of the vacuum relief valve assembly thereby defining a valve seat of line contact wherein the area downstream of the valve seat is greater than the area at the valve seat.

Abstract: An over-pressure relief valve to be positioned within an opening of a vessel, the relief valve having a valve member with a closed end which is positioned within the opening and which carries an O-ring adjacent to the closed end. The O-ring normally engages the vessel in a circumferential pattern surrounding the opening to seal the opening. The valve member further has a second end within the vessel and the second end is resiliently biased toward the interior of the vessel by a coil spring. The coil spring is trapped between a radial flange of the valve member, which is positioned at the second end thereof, and the inside of the vessel. An over-pressure condition within the vessel overcomes the effect of the coil spring and moves the valve member to break the sealing engagement between the O-ring and the vessel. An initial, limited degree of venting occurs through an annulus which is formed between the opening and the valve member.

Abstract: A safety system for automatically preventing over pressure in the interior of a pneumatically operated tool supplied from a source of compressed air includes a safety relief valve detachably connected between the tool and the compressed air source. The safety valve includes a hollow housing having a relief port therein and a resettable valve member is mounted in the housing and movable to open and close the relief port in response to the level of air pressure supplied from the source of compressed air. The housing includes an access opening opposite the relief port and a removable stop member is provided to normally close the access opening and limit the movement of the valve member in a direction inwardly of the housing. The access opening is dimensioned to permit easy insertion and removal of the valve member into and out of the housing.

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: Modular circulating and dead end color changers are made from synthetic materials inert to chlorinated hydrocarbon solvents. Universal supply and return manifolds have relatively smooth and uninterrupted walls defined, in part, by inlet and return valve surfaces, for easy solvent flow cleaning. Circulating high pressure color changers have improved actuators and circulating means including bypass lines for continuously recirculating both selected and non-selected paints. Valve sealing is enhanced by improved valves and pressure drop across each module is minimized by modular construction regardless of the number of modules used.

Abstract: The check valve employs a helical tension spring which is connected at one end to the valve lid on the axis of the valve lid and at the opposite end via a ring on the axis of the valve body. Wedge-shaped elements are provided in the lid to engage with an annular groove in the spring and similar wedge-shaped elements are provided in a hub of the ring to engage with the second end of the spring. A rubber member may also be inserted within the windings of the spring to reduce the flow cross section through the valve body.

Abstract: An improved method for using a membrane to separate gases provides for relieving the pressure on the permeate side of the membrane when the permeate pressure exceeds the feed pressure by a selected amount. Gas separation apparatus in general and, in particular, spiral wound membrane units are improved by providing for relief of such reversed pressure differentials. A suitable device for relieving the reversed pressure differential includes a body, a poppet movably mounted to the body and biased to a closed position until the selected pressure differential is reached, and a seal for preventing gas flow through the device when the poppet is closed.

Abstract: A valve to control abrasive fluids under high pressure has a plastic seat. A circular ridge peripherally formed on the valve cartridge sealingly engages the seat. A means is provided within the valve cartridge to support the seat axially and radially. The diameter and taper of the poppet match those of a mating recess in the seat.

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 valve plug (22, 22a, 22b) is biased inwardly by a spring (78, 78a, 78b) to close an opening (6, 6a, 6b) in a tank. A stem (32, 32a, 32b) extends axially inwardly from the plug (22, 22a, 22b). The stem (32, 32a, 32b) has an inner portion (36, 36a, 36b) which is mechanically interlocked with an outer portion (52, 52a, 52b) to directly transmit axial forces created by the spring (78, 78a, 78b). Fusible material (66, 66a, 66b) holds the stem portions (36, 36a, 36b, 52, 52a, 52b) in an interlocking position but carries only relatively small loads. The plug (22, 22a, 22b) and stem (32, 32a, 32b) move against the force of the spring (78, 78a, 78b) to relieve pressure. At elevated temperatures, the fusible material (66, 66a, 66b) melts to allow the stem portions (36, 36a, 36b, 52, 52a, 52b) to separate and the plug (22, 22a, 22b) and outer stem portion (52, 52a, 52b) to move away from the opening (6, 6a, 6b).

Abstract: The fluid valve assembly includes a hollow movable valve having an open-ended tubular fluid filter in the longitudinal bore of the valve and overlying transverse fluid discharge passages in the hollow valve to filter fluid before it flows through the transverse discharge passages from inside the valve. Downstream of the tubular fluid filter, the hollow valve includes one or more fluid metering passages which are moved relative to a valve seat to control a second flow of fluid from inside the valve. The increased fluid flow longitudinally in the valve bore when the valve is moved from the seat to effect the second fluid flow exerts a washing action on the tubular fuel filter to remove debris or foreign matter therefrom and carry same out through relatively large fluid passages not prone to clogging.

Abstract: A pressure regulator including high and low pressure chambers separated by a divider having an opening, a closing member biassed to a closing position for closing the opening with a biassing force according to a desired pressure differential between the chambers, and a damping device for damping the resulting force on the closing member. There is also disclosed a fluid drainage system having a suction chamber with a suction regulator, and various arrangements of diaphragms for measuring pressure differentials. An anti-spill device for the draining system is disclosed as well.

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 pumping system for containing and dispensing liquids, such as poisonous or hazardous chemicals and the like. The system has a spring-biased, manually-openable by pass valve incorporated therein which is selectively positionable in various positions without the user coming in contact with the poisonous or hazardous chemicals and the like.

Abstract: The disclosure is of a ball check valve comprising a valve body with a flow passageway completely through it. The flow passageway is counterbored at one end to form a conical seat and at the other end to form a radial shoulder. The valve member comprises an integral ball and stem of an elastomer. The stem is inserted through the valve passageway and stretched to function in the nature of a tension spring, with lateral extensions on the stem seated against the radial shoulder of the valve body.

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 pressure relief device (28) removably secured to a pressure vessel (10) has a valve closure (83) including an inner valve plate (84) and an outer cover (96) thereover. A spindle (68) is secured separately to valve plate (84) and cover (96), and springs (80, 82) positioned below a tapered plug (54) urges valve closure (83) to a closed position. An elastomeric O-ring (108) between plate (84) and cover (96) forms the primary seal and may be removed and replaced while valve plate (84) remains in a seated closed position.

Abstract: A valve device for use in filling cartons includes a tubular housing containing a valve member comprising a closure part co-operating with a valve seat at the lower extremity of the housing, and a driving part movably received with clearance in the housing. During the latter part of the opening movement of the valve member against a spring, the clearance increases smoothly and considerably, and the driving part reaches a force equilibrium position at which the clearance is considerable. Two grooves formed in the housing and the valve member immediately below the annulus of sealing bound an annular enclosed space for receiving liquid squeezed out downwardly at the valve seat.

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 liquid dispensing apparatus is provided having a container for storing the liquid to be dispensed, an anti-drip valve cartridge connected to the container and a needle element connected to the valve cartridge. A device is provided for pressurizing the container for the duration of a time interval and for depressurizing the container to atmospheric pressure, simultaneously, with the end of the time interval. The valve cartridge has an outlet portion which sealably connects an outlet opening thereof in registry with the bore of the needle element. A pressure activated poppet valve can be provided in the valve cartridge to seal the outlet opening upon the depressurization of the container. After depressurization, a volume of liquid is left in the needle element which exerts a pressure at the end of the needle element that is less than the incoming atmospheric pressure.

Abstract: A steam injection valve for continuously injecting steam into viscous food products such as relishes, sauces, jams and jellies which are continuously pumped through a steam injection zone. The valve has a sanitary irrotational, interlocking valve stem-valve sleeve construction without substantial internal crevices and which has very low maintenance and may be readily assembled and disassembled.

Abstract: A flow dividing valve wherein an outer sleeve (26) is maintained in a valve body (10) and has a primary flow valve seat (32). An inner valve sleeve (50) that is slidably maintained in outer sleeve (26) has an end face (51) that cooperates with the valve seat (32) to control primary flow. A valve spool (74) that is slidably maintained in inner valve sleeve (50) cooperates with a secondary flow valve seat (70) of inner valve sleeve (50) to control secondary flow.

Abstract: A tire valve having a molded tubular plastic insert having a conical seat and adjacent the seat integrally molded inward radial ribs engaging and guiding a valve pin. To the pin is secured a valve element adapted to sealingly engage the seat. The insert is bonded within a molded rubber body.

Abstract: An apparatus incorporating a normally-closed check valve mounted on the inlet end of a vapor withdrawal conduit and located in the upper vapor portion of a partially filled pressurized LP gas tank on a recreational vehicle or the like. The outlet end of the vapor withdrawal conduit extends to a point lower and exterior to the volatile liquid container and is connected to a control valve to stop the flow of fluid. As the control valve is opened to allow fluid to pass. Then the pressure in the vapor withdrawal conduit drops. The check valve opens and allows gases from the volatile liquid container to pass down the tube. After the control valve is closed, the pressure in the vapor withdrawal conduit increases till it equals the pressure in the container. The check valve closes and stops the flow of fluid.When the apparatus is used in a movable mode, such as on a vehicle, the check valve is closed, preventing the volatile liquid contained in the container from being splashed into the vapor withdrawal conduit.

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: A relief valve with a low hysteresis closing curve with a fixed seat and a spring-biased poppet which is guided for longitudinal movement by an axial guide sleeve and aligns with its seat by pivoting about a fixed point through a small angle of rotation.

Abstract: A pressure relief device for use on a liquid filled vessel, such as a power transformer having a coolant oil enclosed, which device includes a clamp arranged on the device so that the pressure relief function of the device is negated until the clamp is removed.

Abstract: A snap-on, easily removable, fluid shut off valve (with pipe and interlocking member) that is useful as a low cost, primary turn off valve for domestic and commercial fluid fixtures and is quickly installed by manual snap-on between the inlet fluid supply and the supply pipe to conventional fixtures such as faucets or the like. The valve comprises a rigid housing having an inlet chamber and an outlet chamber, and a cross-over passage separating the first and second chambers that houses a moveable ball or poppet valve member that is held in the cross-over chamber by a spring retainer. A mechanical plunger or cam device (operable from the exterior of the housing) is disposed within the outlet chamber for contacting and pushing the ball or poppet valve member against the spring retainer, away from the valve seat, to open the valve.

Abstract: A safety pressure relief device for a refrigerated liquified gas storage vessel having a large diameter valve seat mounted on the vessel, a valve closure movably mounted to engage the valve seat to close flow therethrough and to move away from the valve seat to relieve pressure in the vessel, a spindle extending through the seat and guided by a spider spanning the seat, a spring within the vessel biasing the valve closure toward the seat and means of preselected strength retaining the valve closure on the seat unitl a preselected maximum desired fluid pressure is reached within the vessel at which time such retaining means fails and valve closure moves to open position to provide large area relief of fluid pressure from the vessel.

Abstract: This invention concerns a non-return valve having a directional injector, comprising a body provided with a valve seat.

Abstract: An in-line filter element is disposed within a tubular valve spool which shifts to either meter or shut-off fluid flow through the valve in response to a preselected pressure differential across the valve and element which is some value below a value which could result in damage to the filter element.

Abstract: A valve apparatus is integrally molded from an elastomeric material so as to form a valve seating portion including a valve opening, a valve member and connective strands extending from the valve seating portion to the valve member. The valve member is initially molded on one side of the valve opening, and a portion of the valve member is passed through the opening to the other side thereof. The connective strands are stretched while passing a portion of the valve member through the opening so as to create a bias on the valve member which tends to seat the valve member on the other side of the opening.

Abstract: A guide for a poppet in a check valve includes an annular, cylindrical rim and a guide hub concentric therewith. At least one web extends radially from the guide hub to the rim. The outer periphery of the rim includes at least one projection defined at a position angularly spaced from the web. The projection is engaged by the inner periphery of the check valve such that the guide is held within the check valve, with a stem on the poppet extending through the guide hub. The guide hub includes at least one lug to engage the stem to prevent rotation of the stem relative to the check valve. The guide is formed of a smooth bearing material, and the rim thereof is capable of flexing, in the area where the projections are provided.

Abstract: An anti-reflux device comprising, a drainage receptacle having a chamber and a wall defining a lumen communicating with the chamber. The receptacle has an annular valve seat facing away from the lumen. The device has an elastic valve element having an elongated stem, and a disc connected to one end of the stem and having an upper surface normally sealingly engaging against the seat. The valve element has a retaining member for retaining the other end of the stem to the wall with the disc biased against the seat and with the retaining member defining an opening to permit passage of liquid therethrough.

Abstract: There is disclosed an improved check valve for operation under light pressure, as in the oral inflation of inflatable articles. The valve has a valve body and a valve element reciprocable therein, the valve element having a body which carries an annular sealing means cooperating with and selectively sealing an axially outwardly converging valve seat having the shape of part of a sphere. The valve body and the valve element are substantially shorter than those of the prior art over which it is an improvement; the means for guiding the forward or outer end of the valve element remote from the valve seat and the sealing means has pronounced clearance with respect to the axial passage through the valve body, thereby permitting appreciable tipping of the valve element relative to the valve body, the sealing means effecting a seal with the valve seat in any position of the valve element in which it may be tipped relative to the valve body.

Abstract: A pressure relief valve has a valve disc with a valve stem extending through a valve opening and an annular sealing washer disposed between the disc and a valve seat about the valve opening operated by a limitedly flexible, spring loaded, longitudinally ribbed, holding element with a conically tapering central aperture through a central hub thereof through which the valve stem extends to dispose an enlarged valve stem head behind a hub shoulder.

Abstract: A back flow preventing device is disclosed which prevents the reverse flow of water from a point of use into a water supply system. The device has a casing with coaxially aligned inlet and outlet openings, and containing coaxially aligned inlet and outlet check valves. The coaxial alignment of the inlet and outlet openings, and of the inlet and outlet check valves serves to minimize the pressure drop through the device. Between the inlet and outlet check valves is a diaphragm actuated relief valve which opens to drain the passage between the check valves if they should malfunction or if there is a drop in the supply line pressure sufficient to cause actual or potential reverse flow back toward the supply line. The internally-located inlet and outlet check valves are each removably secured in place by internally-located retaining rings.

Abstract: A fluid pressure relief valve provides automatic venting of a high pressure source to an area of lower pressure in response to pressure build-up of the source. The valve includes a valve body in which a recess is provided, a passage providing communication between one end of the recess and the source. A poppet is oriented for movement with respect to the recess and includes a sealing element adapted to close the other end of the recess by sealing engagement with the valve body. A spring urges the poppet toward sealing engagement. The poppet has ports proximate the sealing element which are covered when the sealing engagement is maintained but are uncovered progressively with movement of the poppet out of sealing engagement. If the source pressure exceeds a predetermined threshold level, the poppet is driven increasingly away from the sealing engagement with increase in pressure of the source for progressively uncovering the ports in response to dynamic impact upon the poppet by fluid flow through the valve.

Abstract: A system for filling and emptying a fluid storage tank includes an air pressure source 11, a vent valve 12, and a fill valve 14. The vent valve 12 includes first and second housing portions 23 and 24 and a main valve member 18. A coil spring 20 acts between the second housing portion 24 and a valve stem 19 to close the main valve member 18 and to bias the housing portions 23 and 24 together. A piston 21 cooperates with the second housing portion 24 to define an expansible chamber 39, and air pressure from the source 11 enters the chamber 39 to move the piston 21 and open the main valve member 18. A secondary valve member 40 isolates the fill valve 14 from the air pressure source 11 until the main valve member 18 is opened, and then communicates air pressure to the fill valve 14 to open the fill valve 14 and permit filling or emptying the tank.

Abstract: A valve structure for cleaning purposes extends at least with part of its housing through a hole in a wall to be cleaned. Outlet nozzles in the housing extend so as to direct a cleaning medium substantially in parallel to or at a slight angle relative to the surface to be cleaned. The nozzles are so arranged that substantially a circle is covered by the resulting flow pattern. A valve closure is normally biassed into a nozzle closing position and may be lifted off the valve seat by the pressure of the cleaning medium flowing through the valve structure.

Abstract: A poppet located in the opening of an annular seat member for use in a body for forming a check valve. The poppet has a resilient seal for engaging a seat formed in the seat member for forming a seal therebetween and which also prevents removal of the poppet from the opening of the seat member. A spring normally urges the poppet in a direction to urge the seal against the seat. The poppet has ribs slidably located in slots formed in the seat member to prevent rotation of the poppet to minimize spring failure. The poppet and seat assembly can be located in the body in either direction to allow the check valve to be used for different purposes. Safety stops are provided in the body for the poppet to prevent shearing of the seal in the event of use in excessive pressure conditions.

Abstract: A catalyst spray nozzle for injecting a finely atomized spray of liquid catalyst into a high pressure chemical reactor such as an autoclave reaction vessel for polymerizing ethylene into polyethylene. The liquid catalyst is fed under pressure to the discharge end of a passageway in the spray nozzle. A cylindrical valve member is positioned in a cylindrical compartment disposed adjacent to and coaxially with the discharge end of the passageway, and is biased against the discharge end by a spring coaxially positioned in the compartment. The spring biased valve element prevents liquid catalyst from passing through the nozzle until a given backpressure on the catalyst is established. When the given backpressure is reached, the pressure biases the valve member away from the passageway and the catalyst is forced through at least one discharge orifice under sufficient pressure to cause it to be sprayed in a finely atomized state into the reactor.