Abstract: Embodiments of the invention relate to a first stage pressure reducing valve having a tubular plug, particularly for regulators of scuba breathing apparatus. According to embodiments of the invention, at least a portion of the outer surface of the valve has fins for heat exchange with the outside environment, designed to prevent or reduce the formation of ice caused by the temperature drop generated by gas expansion inside the valve.

Abstract: The present application is directed to a gas-generating apparatus and various pressure regulators or pressure-regulating valves. Hydrogen is generated within the gas-generating apparatus and is transported to a fuel cell. The transportation of a first fuel component to a second fuel component to generate of hydrogen occurs automatically depending on the pressure of a reaction chamber within the gas-generating apparatus. The pressure regulators and flow orifices are provided to regulate the hydrogen pressure and to minimize the fluctuation in pressure of the hydrogen received by the fuel cell. Connecting valves to connect the gas-generating apparatus to the fuel cell are also provided.

Abstract: A fluid-handling system that, in some embodiments, includes a poppet having a body, a magnet, and a mounting member configured to secure the magnet to the body is disclosed. Additionally, a method of forming a valve is disclosed.

Abstract: A breather valve comprises a valve body having a valve fluid passageway terminating in a valve seat. The valve body includes a pressure pallet guide and the valve seat has double lips. A pressure pallet having a size commensurate with the valve seat is mounted on the pressure pallet guide for limited motion towards and away from the valve seat. The pressure pallet has a sealing side oriented to face the valve seat. A flexible diaphragm extending inside the valve seat is secured to the sealing side of the pressure pallet outside the valve seat. A gap lies between the double lips of the valve seat. A liquid source is in fluid communication with the gap lying between the double lips of the valve seat. A liquid seal provides protection against freezing, gumming and leaking of the seal.

Abstract: A dispensing valve with admission pressure compensation and a safety device for maximum pressure limitation of the admission pressure. To accomplish the object, a deformation zone (18), which can be brought into contact with a support surface (14) by the admission pressure by admitting pressure in the direction of a reduction of the active area of the compensating diaphragm (10), is provided in the area of a compensating diaphragm (10).

Abstract: According to the invention, a non-rotatable lock sleeve 20 concentrically arranged on the valve seat 3 is provided with a non-circular outer contour onto which the unloader 22 is placed with its radial central section 28, which is correspondingly formed in a diametrically opposed manner to prevent said unloader from turning.

Abstract: A check ring is mounted around a shaft of a screw tip that is mounted on a front part of a screw, whereby a resin is prevented from flowing back from ahead of a conical portion toward the screw. Projections are provided on a front end surface of the check ring. In measurement, a rear end surface of the conical portion of the screw tip and respective end surfaces of the projections are brought into contact with one another, whereby gaps are created between the screw tip and respective root surfaces of teeth of the check ring. By doing this, resin passages can be secured around contact surfaces between the rear end surface of the screw tip and the respective end surfaces of the projections of the check ring.

Abstract: A valve assembly for use in winterizing a swimming pool closes to prevent pool water from entering into a pool pipe situated below the water line and opens to allow fluid or air to be pumped out of the pool pipes, including an adaptor having threads for attachment to a hose so the pipe contents may be pumped directly into the hose and out of the pool.

Abstract: A device for microfluidic control comprising a regulator that is moveable in a conduit where the regulator is a composite polymer formed from a composite mixture comprising a polymerizable precursor and a particulate filler.

Abstract: A check valve for a molding machine. The check valve has a stem portion and a ring portion movable along said stem portion between a melt channel open position and a melt channel closed position. A groove is formed in a forward face of the ring portion. The groove, in operation, receives melt to force an outer circumferential portion of the ring in a radial direction to provide a seal between the ring portion and a wall in the machine.

Abstract: A check valve includes a casing member, a tear-drop shaped ball member installed in the casing member, a latching member which is formed at an inner wall of the casing member and an airtight valve which is formed at an inner wall of the casing member. When forward flux occurs, the ball member is fixed at the latching members absolutely to circulate the forward flux stably. When backward flux occurs, the ball member is latched at the airtight member to close the casing member and thus, to suppress the backward flux.

Abstract: A vacuum fitting having a check valve for use in bagging composite parts prior to and curing the during process, in which the body of the vacuum fitting is formed from a single piece of material, and the check valve has no loose fitting parts is disclosed. The vacuum fitting has a one-piece body portion having a base flange, a central neck portion, and a top quick-connect fitting adapted for releasable connection to a conventional vacuum source. The check valve is disposed within the central neck portion with a snap ring.

Abstract: Embedded check-valve assembly (100, 600) for integration in a micro-fluidic system. The assembly can include a check-valve chamber (104, 604), an inlet port (106, 606) and an outlet port (108, 608) formed from at least one layer of liquid crystal polymer (LCP) film to form a substrate (102, 602). A plug (114, 614) is disposed within the check-valve chamber.

Abstract: The valve includes a supply portion, a delivery portion and an intermediate fluid chamber; a poppet member is positioned within the fluid chamber and is adapted to move within the chamber, the poppet including a conical seating surface and a rim portion, the rim portion having openings therethrough into the open interior of the poppet, allowing for forward fluid flow through the poppet. A delivery poppet seat and a supply poppet seat are defined at opposite ends of the fluid chamber. The delivery poppet seat is configured so that when the rim portion of the poppet contacts the delivery seat, fluid flow in the forward direction is permitted. The supply poppet seat is configured such that when the conical seating surface of the poppet member contacts the supply poppet seat, backflow through the valve is substantially prevented.

Abstract: A pressure relief valve has a housing fluidly connected to a pressurized system line carrying a system fluid. The housing carries a moveable piston and a valve member that both move between closed and open positions. The piston defines an upper chamber and a lower chamber within the housing. A pressurized fluid is supplied to the upper chamber to bias the piston toward the closed position. After the relief valve opens from excessive system pressure, the pressurized fluid is injected into the lower chamber to delay the return of the piston to the closed position. Initially, the fluid in the lower chamber flows through a check valve while the piston returns to the closed position. Then the fluid vent in the lower chamber vents from the lower chamber as the piston and valve member approach the closed position.

Abstract: A device for adjusting the degree of vacuum in an apparatus for collecting substances by suction, comprising a valve that is provided with an air flow port connected to the atmosphere at one end and to a chamber at the other end, the chamber being connected to a source of vacuum and to the apparatus, and the port comprising a flow control element that is adapted to be attracted into the closed position by the action of a permanent magnet supported in the body of the valve in an adjustable position.

Abstract: A valve comprising a housing having an inlet and spaced therefrom an outlet, a passageway extending between the inlet and the outlet, and a mechanism located in the passageway for controlling the flow of a fluid between the inlet and the outlet, the mechanism including a valve assembly movable between a first open position spaced from a co-operating valve seat and a second closed position at which the valve assembly sealingly engages the valve seat, in which the valve assembly is biased towards the second closed position using a magnet-operated mechanism.

Abstract: A valve assembly for use in winterizing a swimming pool has a plurality of flow apertures and opens to allow water to flow out of the swimming pool pipes and conduits through a valve flow conduit and the flow apertures and into the pool, and closes under the pressure of the water in the pool to prevent the water from flowing back through the flow apertures, thereby enabling one to empty the pipes and conduits without having to drain the pool.

Abstract: A check valve for micro electro mechanical structure devices (MEMS), and in particular pertains to a check valve which is adapted to be employed in connection with micro electro mechanical structure devices which are intended to be employed with supercritical fluids constituting working fluids. In a preferred embodiment, the check valve is equipped with a bypass channel including a freely moveable plug structure which, in the open position of the valve enables the ingress of supercritical fluids under high superatmospheric pressures, and subsequent to the filling of the system, let down to atmospheric pressure, causes the plug to be moved into a permanent valve-closed position.

Abstract: A valve assembly for use in winterizing a swimming pool closes to prevent pool water from entering into a pool pipe situated below the water line and opens to allow fluid or air to be pumped out of the pool pipes, including an adaptor having threads for attachment to a hose so the pipe contents may be pumped directly into the hose and out of the pool.

Abstract: A valve assembly for use in winterizing a swimming pool has a plurality of flow apertures and opens to allow water to flow out of the swimming pool pipes and conduits through a valve flow conduit and the flow apertures and into the pool, and closes under the pressure of the water in the pool to prevent the water from flowing back through the flow apertures, thereby enabling one to empty the pipes and conduits without having to drain the pool.

Abstract: A check valve for micro electro mechanical structure devices (MEMS), and in particular pertains to a check valve which is adapted to be employed in connection with micro electro mechanical structure devices which are intended to be employed with supercritical fluids constituting working fluids. In a preferred embodiment, the check valve is equipped with a bypass channel including a freely moveable plug structure which, in the open position of the valve enables the ingress of supercritical fluids under high superatmospheric pressures, and subsequent to the filling of the system, let down to atmospheric pressure, causes the plug to be moved into a permanent valve-closed position.

Abstract: A bottom discharge valve is located on the bottom of the pump barrel just above the standing valve. The externally threaded pin end of the standing valve threads into the lower internally threaded portion of the bottom discharge valve. The externally threaded or pin end of the bottom discharge valve is large enough to allow the plunger cage or the traveling valves to actually stroke into the hollow portion of the neck or pin end of the disclosed bottom discharge valve.

Abstract: A check valve assembly for a shock absorber includes a tapered valve seat and a polygonal check valve which includes a plurality of flat surfaces. Each pair of flat surfaces intersects at a linear engagement surface which slidably engage a cylindrical chamber. When the polygonal check valve is in an open position, fluid flows along the flat surfaces even though the linear engagement surfaces are essentially in contact with the cylindrical chamber. Lateral movement of the check valve is effectively eliminated which minimizes noise and vibration of the check valve assembly.

Abstract: A drainage valve tap assembly for connection of a branch line to a main line while simultaneously forming a freeze proof drain comprising a hollow body having a first end and a second end, a cutting tube attached to the first end of the body; a handle having a hollow interior, the handle attached to the second end of the body for rotating the body; and a resilient drain plug extending at least partially in the body for blocking off the flow of water therethrough under a water pressure and for allowing the draining of water therethrough and out of the drainage valve when the water pressure is cut-off.

Abstract: A fluid filter assembly includes a valve assembly having a plunger with openings defined therein. The plunger includes a sealing portion and a non-sealing portion. The sealing portion sealingly engages a valve seat, while the non-sealing portion includes an opening which leads to a central passage through the plunger, the opening and central passage cooperating to direct the flow of fluid through the plunger and an associated spring.

Abstract: A packing assembly, retrofit kit, and check valve with adjustable lift having a ball stop member having opposed first and second contact portions and at least two washers being provided in a stacking configuration. The stacking configuration is one selected from one in which all of the at least two washers are stacked against the first contact portion of the ball stop member, one in which all of the at least two washers are stacked against the second contact portion of the ball stop member, and one in which at least one of the at least two washers is stacked against the first contact portion of the ball stop member and at least one of the at least two washers is stacked against the second contact portion of the ball stop member. Preferably, the at least two washers are of different thicknesses with, more preferably, the thicknesses of the at least two washers being multiples of each other.

Abstract: A pressure (1) release valve is disclosed ideally for use on petrol tankers which can rollover in an accident. There is a requirement for such valves both to become sealed in the event of a rollover to prevent the escape of volatile and flammable fluid from within the tanker, and also to allow for the venting of gas above the fluid within the tanker under normal operating conditions. The valve comprises a movable plunger (24) and a fixed seat (32) which can move axially towards and away from each other to open and close the valve. One or other of valve seat and plunger is provided with magnetic inserts (23), while the alternate component is ferromagnetic so that magnetic attraction betwixt the two components acts to bias the valve towards a closed condition.

Abstract: A check valve for a fuel pump of a vehicle includes a retainer adapted to be disposed in an outlet member of the fuel pump. The check valve also includes a valve seat adapted to be disposed in the outlet member and spaced from the retainer. The check valve includes a valve member disposed in the outlet member between the retainer and the valve seat. The valve member has a closed position to engage the valve seat to prevent fuel from flowing through the outlet member and an open position to allow fuel to flow through the outlet member. The check valve further includes a magnet cooperating with the valve member for generating a magnetic force on the valve member to maintain a contact force between the valve member and the valve seat when the valve member is in the closed position.

Abstract: A check valve for micro electro mechanical structure devices (MEMS), and in particular pertains to a check valve which is adapted to be employed in connection with micro electro mechanical structure devices which are intended to be employed with supercritical fluids constituting working fluids. In a preferred embodiment, the check valve is equipped with a bypass channel including a freely moveable plug structure which, in the open position of the valve enables the ingress of supercritical fluids under high superatmospheric pressures, and subsequent to the filling of the system, let down to atmospheric pressure, causes the plug to be moved into a permanent valve-closed position.

Abstract: A compressor assembly includes a shell which defines a discharge chamber. A discharge valve assembly is attached to the shell in communication with the discharge chamber. The discharge valve assembly includes a stamped or coined valve seat, a drawn tubular element and a stamped valve member. The stamping, drawing and coining operations used to manufacture the discharge valve assembly significantly reduce the manufacturing costs for the discharge valve assembly.

Abstract: A pressure relief valve has a main valve body, a fluid inlet passageway, a fluid outlet passageway, and a piston contained within the main body. The piston has a piston head, slidingly and sealingly engaged within a pressurized cavity in the main valve body. The piston head's principal face, having a given surface area, is exposed to a pressurized gas in the cavity. A piston stem, connected to the piston head, is in sliding communication with a packoff assembly and has an exposed face whose surface area is smaller than the piston head's principal face. The piston stem's exposed face is in communication with the pressurized gas or fluids to be regulated. In operation, a gas or fluid pressurized to a predetermined value in the pressurized cavity acts against the piston head, forcing one or more ports in the piston stem sidewall to be sealed from the fluid outlet passageway.

Abstract: A sliding ring non-return valve primarily for use with an injection molding machine utilizes a frame having cut therein one or more longitudinal grooves. Material flows around the outer edge of a flange surface, into an inlet area, and through the longitudinal grooves in the frame's outer surface before entering an accumulation volume. A ring, dimensioned to fit slidably around the frame, blocks material flow into the grooves while in an upstream position and allows material to pass through the grooves while in a downstream position. In an alternative embodiment, the non-return valve utilizes a frame that surrounds a central passage accessed by inlets. The outlet passage is located downstream of said inlet and connects the central passage with an accumulation volume. A ring is dimensioned to slidably fit around the frame. A flange surface limits the ring's upstream travel, while grooves in the flange surface throttle, or limit, material flow into the inlet area.

Abstract: A compressor assembly includes a shell which defines a discharge chamber. A discharge valve assembly is attached to the shell in communication with the discharge chamber. The discharge valve assembly includes a stamped or coined valve seat, a drawn tubular element and a stamped valve member. The stamping, drawing and coining operations used to manufacture the discharge valve assembly significantly reduce the manufacturing costs for the discharge valve assembly.

Abstract: A sight glass filter and check valve apparatus for use in a fluid line. The apparatus includes a housing, first and second couplers connected to the housing, a sight glass assembly, a filter assembly, and a check valve assembly. The housing includes a pair of coordinated apertures. Each of the couplers includes a first end and a second end with the first ends threadedly received by the housing and the second ends connected to the fluid line. The sight glass assembly is disposed within the housing in alignment with the apertures. The filter assembly is disposed between the housing and the first coupler. The check valve assembly is disposed between the housing and the second coupler.

Abstract: A compressor comprises a cylinder assembly forming a compression space. A compressing member is movable disposed in the compression space for compressing fluid therein. A discharge port communicates with the compression space for discharging compressed fluid. A valve is mounted on the cylinder assembly for sliding movement across the discharge port between a first position blocking the discharge port, and a second position unblocking the discharge port. A valve mover in the form of a plate spring is connected to the valve and communicates with pressure in the compression space. In response to a pressure build-up in the compression space, the plate spring is elastically deformed to slide the valve from the first position to the second position for unblocking the discharge port.

Abstract: A one-way flow valve quick connector is used in automotive fuel tank filler systems to interconnect the fuel filler tube with the fuel tank without the use of tools or special equipment. The quick connector includes a check valve to establish a substantially hermetic seal between the tank and the environment at all times to prevent the escape of liquid fuel during the refueling process as well as the escape of toxic vapors. A bypass vent operates during the refueling process to draw any vapors escaping from the tank or entering through the fuel fill tube inlet, filtering and returning them to the fuel tank.

Abstract: A check valve is described which employs a magnetic biasing component, disposed external to the valve body, to exert force on a poppet, at least a portion of which is ferrous. In a "normal" mode of operation, the poppet is urged against the inlet end surface of the cavity by the basing component, and moves away from the inlet end surface of the cavity to permit fluid flow from an inlet port to an outlet (downstream) port once a differential cracking pressure is achieved. In a "bidirectional" or "purge" mode of operation, the biasing component is positioned adjacent the outlet end of the valve body to retain the poppet in an open position, away from the inlet end surface of the cavity. The bi-directional capability of the disclosed check valve is beneficial for welded installation and cyclic purging of systems, and allows for a full vacuum to be achieved because the effect of cracking pressure is eliminated.

Abstract: A breather valve has a valve body having a fluid passageway terminating in a valve seat, and a pressure pallet having a size commensurate with the valve seat. The pressure pallet has a sealing side oriented to face the valve seat, and is mounted for limited motion towards and away from the valve seat. A flexible diaphragm is secured to the sealing side of the pressure pallet circumferentially outside the valve seat, preferably around an outer periphery of the valve seat. The flexible diaphragm is separated from the sealing side between the first and second circumferences to create an annular cushion over the valve seat. The flexible diaphragm is fluid impervious outside of the valve seat and fluid pervious inside the valve seat.

Abstract: A compressed natural gas charging system includes a gas charging passageway whose one end is capable of being connected to a compressed natural gas supply device capable of supplying a compressed natural gas and whose other end opens into a gas vessel, and a one-way valve incorporated in the gas charging passageway to permit the compressed natural gas to flow from the one end of the gas charging passage through the one-way valve toward the other end. In the compressed natural gas charging system, a constriction is provided in the gas charging passageway downstream of the one-way valve and has a constriction degree larger than that of the one-way valve. Thus, it is possible to prevent an excessive temperature drop due to the adiabatic expansion of the compressed natural gas from occurring across the one-way valve and to rapidly charge the compressed natural gas, and it is unnecessary to use an expensive material for a part of or constituting the one-way valve.

Abstract: My invention is a gravity check valve 20 that will have a relatively low back flow of liquid when the sealing seat 2 is positioned above the porous seat 8 and the direction of back flow of liquid is opposite to the direction of the force of gravity 18.

Abstract: A pump has an extruded metal housing surrounding a square internal chamber accommodating a piston assembly with square pistons. An eccentric member and block assembly associated with a driven shaft reciprocates the piston assembly to pump fluid. The flow of fluid into and out of the pumping chamber is controlled with intake and exhaust valves incorporated into plates mounted on opposite ends of the housing.

Abstract: A high pressure poppet-type regulating valve for controlling fluids that have been pressurized up to approximately 20,000 psi (1,400 kg/cm.sup.2). In the preferred embodiment the disclosed gas-dampened valve includes a stainless steel tapered poppet which is slidably positioned within a bore of a stainless steel valve body having an integral tapered valve seat. A portion of the poppet has at least one tapered section having a preselected taper angle. The valve seat has a preselected taper as well. Preferably the tapered section of has a taper angle that is up to approximately 10% larger the taper angle of the valve seat to reduce erosion of the poppet and seat thereby allowing the poppet to be made of stainless steel in lieu of a more wear resistant material. The valve body of the preferred embodiment further includes opposed discharge ports for minimizing pressure imbalances thereby reducing cavitation-induced damage to the valve.

Abstract: A flow limiting throttle element for restricting the flow of a fluid guided in a delivery line, including a pressure-tight housing having a first bore hole portion, a second bore hole portion adjoining the first bore hole portion and two coaxially arranged working connections. A substantially cylindrical piston is arranged in the first bore hole portion of the housing so as to be freely axially displaceable therein, the first bore hole portion having a length that is at least 50% of the piston length. Overflow ducts are arranged in an outer surface area of the piston and the second bore hole portion of the housing has a cylindrical recess which communicates with the overflow ducts and transits into a first one of the working connections. The first working connection having an inner diameter smaller than that of the second bore hole portion.

Abstract: A diaphragm- and spring-less check valve for gaseous media comprising an inlet housing (41) having a sealing edge (51), an outlet housing (11) and a closure body (30) disposed in between the housings, which is guided so as to be axially (14) movable and capable of being impressed bilaterally in any desired position and/or state of the valve, wherein the closure body (30) is moveable exclusively on the basis of a differential pressure between inlet (41) and outlet housing (11) in the blocking position against the sealing edge (51) and in the through-put position the sealing edge (51).

Abstract: A magnetically operated check valve is disclosed having, in one aspect, a valve body and a movable poppet disposed therein, a magnet attracting the poppet to hold the valve shut until the force of fluid flow through the valve overcomes the magnetic attraction and moves the poppet to an unseated, open position; the poppet and magnet configured and disposed to trap magnetically attracted particulate and prevent it from flowing to a valve seating region.

Abstract: An apparatus is disclosed for an improved one-way valve comprising a base for mounting in a chamber with a valve surface engaging with a sealing surface to close an input aperture of the chamber. A flexible web is interposed between the base and the valve surface for resiliently biasing the valve surface into engagement with the sealing surface thereby closing the input aperture. When a fluid pressure from the input aperture exceeds the resilient bias of the flexible web, the valve surface is displaced from the sealing surface for opening the input aperture to permit the flow of the liquid from the input aperture through the chamber into an output aperture. Upon a sufficient fluid pressure within the chamber, the valve surface engages with the sealing surface for closing the input aperture to inhibit the flow of fluid from the chamber into the input aperture.

Abstract: A portable suction system is provided for use with collection chambers for pleural drainage devices and for autotransfusion systems. The portable suction system comprises a small container having an inlet port for connection with a collection chamber or autotransfusion bag and an outlet port for connection with a suction source. The container includes a one-way valve system to prevent air from passing into the collection chamber or auto-transfusion bag and further includes a suction regulator and indicator to visually indicate the suction level.

Abstract: A shut-off valve for use in a filtration system with a filter element having a tubular coupling member at one end arranged so that when the filter is installed in the system the coupling element extends into a tubular housing to displace a spool to thereby permit flow through the filter element, the spool being returned by a compression spring to a closed position within the housing to shut off flow when the filter element is removed, the tubular housing having a pair of spaced apart internal sealing faces and the spool having a matching pair of spaced apart sealing surfaces that close against each other when the spool is in the closed position to thereby prevent flow through the valve. The valve is arranged in such a way that when in the closed position fluid pressure applied to the valve exerts force on the spool to urge it more tightly into the closed position.

Abstract: A scroll type hermetic compressor is disclosed which incorporates an improved disc type check valve in the discharge conduit exiting from the compressor shell. The check valve operates to prevent return of high pressure refrigerant which may cause reverse movement of the orbiting scroll upon shut down of the compressor.