Abstract: A quick connector having a check device includes an outer body, a locking member, an engaging ring, an inner body and an outer locking member. The inner body has a protrusion at one end thereof and an opening next to the protrusion. The protrusion is connected with a membrane member. The membrane member has a central through hole for insertion of the protrusion and a membrane sheet adapted to cover the opening. The membrane member provides a one-way function for air flow. When air flows reversely, the membrane member will cover the opening to provide a check function.

Abstract: A negative pressure wound therapy apparatus that can include a wound dressing, a fluid collection device, a vacuum pump comprising a pump motor, and tubing can be powered by auxiliary power sources such as high efficiency batteries, photovoltaic panels or cells, fuel cells, combustion generators, human powered generators, or other mechanical, electrical, or chemical power sources such as hand operated dynamos or wound springs, or any combination of the foregoing. Additionally, the apparatus can include a high efficiency pressure controller for controlling the output of the vacuum pump. In some embodiments, the pressure controller can control the pump without using a processor, and can have other features such as an intermittent delay function and an anti-stall mechanism to reduce the energy consumption of the apparatus.

Abstract: A sensor for use in a canister for fluid collection, the canister having a canister top and defining a fluid collection chamber. The sensor includes a first electrode and a second electrode. The first electrode includes a first portion and a second portion, wherein the first portion of the first electrode is supported by the canister top, and the second portion of the first electrode is configured to extend into the fluid collection chamber. The second electrode includes a first portion and a second portion, wherein the first portion of the second electrode is supported by the canister top, and the second portion of the second electrode is configured to extend into the fluid collection chamber. The sensor also includes an electric circuit configured to detect an electrical property associated with the first and second electrodes.

Abstract: An apparatus for preventing backflow of a fill valve in a water toilet. The apparatus includes a fill valve for permitting and stopping supply of washing water from a hydrant into a water tank, a fixing section fixing the fill valve to an overflow pipe, a float having a packing for opening or closing an opening/closing hole of the fill valve depending on a level of water contained in the water tank, and a backflow-preventing section disposed inside the fill valve. The backflow-preventing section permits washing water to be supplied from the hydrant into the water tank, and prevents washing water from flowing back toward the hydrant. The backflow-preventing section includes a backflow-preventing member mounted to a supply pipe of the fill valve, and an operation control valve seated on a fitting protrusion of the fill valve to control an operation of the backflow-preventing member.

Abstract: A check valve including a cylindrical valve well defining a chamber, a valve disk, a pin centrally connecting the valve well to the valve disk; the valve disk being axially symmetrically positioned with respect to the valve well. The valve disk forms a fluid seal with an annular rim of the valve well when a first pressure acting on the valve disk is greater that a opposing second pressure within the chamber. The check valve further includes a plurality of vanes disposed within the chamber, where the vanes prevent the valve disk from collapsing into the chamber due to an excessive first pressure on the valve disk.

Abstract: A compressing diaphragm pump having abnormal pressure preventing features for spray use has a hollow tubular air discharge assembly having a plunger body and compressed spring as well as an air passage pierced at the wall of the water exit port and an air discharge orifice pierced of the central top surface of the air discharge assembly for connecting with the plunger body. When air is mixed within the pressurized water, the resilient force of the compressed spring is bigger than the water pressure of the pressurized water. This allows the air mixed in the pressurized water to get into the air passage and pass the plunger opening of the plunger body via through pore, and is dispelled out of the upper hood via the air discharge orifice of the air discharge assembly.

Abstract: A damping valve arrangement for a vibration damper includes a damping valve body, which has at least one through-flow opening for the damping medium, and at least one valve disk which at least partly covers the through-flow openings under the influence of a closing force. The damping valve arrangement includes at least one spring element which has at least one supporting portion axially supported at another structural component part of the damping valve arrangement, and at least one spring portion disposed at a distance from the supporting portion and which introduces a spring force into the valve disk at least indirectly, wherein the spring force of the spring element is directed counter to the closing force acting on the valve disk, and wherein the spring force of the spring element is less than the closing force of the valve disk.

Abstract: One-way valve, especially low-pressure check valve, for use in the medical technology, having a housing consisting of an inlet half and an outlet half and having an inlet channel and an outlet channel with a diaphragm being positioned in a pressure space which is contacting an annular valve seat under pre-tension which is opening into the outlet channel. The pressure space is consisting of two pressure chambers. In the direction of flow before the closing mechanism formed by the valve seat and the diaphragm a second valve mechanism is provided which is opening in the same sense with the first closing mechanism at an over-pressure in the entry channel and which is closing at an over-pressure in the exit channel.

Abstract: The invention relates to a membrane valve, in particular for inhalation devices, comprising a planar membrane made of permanently flexible material, a frame, which has an air opening that is somewhat smaller than the membrane, at least one web, which connects the frame to a retainer that is arranged approximately at the center of the air opening, and a pin, the shaft of which extends through a fastening opening approximately at the center of the membrane and is located in a retaining opening in the retainer, wherein the membrane lies on the frame in the rest state and wherein the pin is spread to form a head, the distance of which to the membrane is small in comparison to the thickness of the membrane or which head lies on the membrane, and the diameter of the shaft near the head is greater than the diameter of the fastening opening,; and the diameter of the shaft at the free end of the shaft is approximately equal to the diameter of the fastening opening.

Abstract: A device for the in situ clearing of blockages in a tube includes a controller and a clearing member. The controller can have a housing and an actuator for generating repetitive motion. The clearing member can be releasably coupled to the controller and suitable for insertion in the tube. The tube can be at least partially disposed within a living being. The controller can be located external to the living being. The clearing member can have a first end releasably coupled to the actuator, at least one flexible section which permits axial displacement of the clearing member, and a second end suitable for repetitively engaging and disrupting the blockage. The flexible section permits the clearing member to repetitively engage and disrupt the blockage within one of a straight and a curved portion of the artificial tube.

Abstract: A device and method for the removal and disposal of transected hair from the body of a patient in an operating room or other sterile location. The hand-held device is single-use, latex-free, sterile-packaged, non-conductive, fully disposable and comprises a hollow handle with a projecting wand ending in an enlarged distal tip. The other end of the hollow handle opposite the enlarged distal tip is connected to a vacuum source, such as the one readily available in most operating rooms, via flexible tubing. When the wand and the enlarged distal tip are passed over transected hair, the hair is suctioned into the hand-held device. The hand-held device includes a particulate filter to prevent the suctioned hair from entering the vacuum system, one or more internal circumferential ribs to create a turbulent flow within the handle, a reservoir to collect transected hair, and venturi apertures to regulate the suction pressure.

Abstract: An inkjet printer has a backflow prevention valve disposed to bottom of subtanks to of the diaphragm pump unit mounted on a carriage, and causes ink passing through the backflow prevention valve to flow to the inkjet head side. A support orifice that supports an umbrella-shaped valve plug, a port formed at a position circumferentially eccentric to the center of the support orifice, and a fluid conduction channel extending from an edge of the port circumferentially around the support orifice are disposed to the valve plug seating surface of the backflow prevention valve. A discharge orifice that discharges ink to the inkjet head side is disposed in the outside wall of the valve plug seating surface, and the discharge orifice and port are formed on the same side of the center of the support orifice.

Abstract: A non-return valve includes a valve housing having at least one inlet, at least one outlet, a first valve seat and a second valve seat; and an at least partially flexible sealing member forceable into a scaling engagement with the first valve seat in response to a first differential pressure and forceable into a sealing engagement with the second valve seat in response to a second differential pressure.

Abstract: A non-return structure of water valve includes a valve body, two limiting elements, and two non-return elements. The valve body forms two inlets and two annular protrusions around the two inlets respectively. Each annular protrusion encloses a receiving room receiving one of the limiting elements. The limiting element defines a widened hole and a reduced hole, and a stepped portion is formed therebetween. The non-return element includes a blocking portion disposed in the widened hole and having an external diameter larger than the one of the reduced hole, and the blocking portion is resilient. Thereby, returning water is unable to separate the circumference of the blocking portion from the stepped portion to form gaps. Thus, the non-return structure of water valve is able to prevent water from flowing back.

Abstract: A portable negative pressure wound therapy system includes a dressing assembly for positioning over a wound to apply a negative pressure to the wound and a canister assembly. The canister assembly includes a control unit having a vacuum source and a controller and a collection canister in communication with the dressing assembly operable to receive fluid from the wound. The collection canister has a filter assembly having a filter and a passageway between the filter and a wall of the collection canister. The collection canister also includes a canister interface having a suction port, an inlet port, and a channel. The vacuum source draws air through the suction port from the channel which draws air from the passageway connected to the channel, the air in the passageway is drawn from the collection canister through the filter, and the air in the collection canister is drawn through the inlet port.

Abstract: A gas fuel supply apparatus includes: first and second mouthpiece attachment sections capable of detachably attaching thereto mouthpieces of first and second gas containers and provided in communication with each other; and first and second check valves provided in a communication passage, communicating between the mouthpiece attachment sections, in corresponding relation to the first and second gas containers. The first and second check valves prevent a gas fuel, let out from any one of the first and second gas containers, from flowing into the other of the gas containers.

Abstract: The air admittance vent (“AAV”) includes a cup shaped vent body and a vertically reciprocating valve element that seats against a valve seat that has two separate contact areas defined by an annular ridge and a conical face formed in the bottom of the vent body. When the valve element moves into its closed position, the pliable diaphragm of the valve element initially contacts the annular ridge, which forms a first part of the valve seat before moving fully into sealing contact with the conical face, which forms the second part of the valve seat. The contact with the annular ridge provides a first initial seal before the diaphragm nests into contact with the conical face to form a second seal with the valve seat.

Abstract: An inflating valve has a body and a valve disk. The body is hollow and has a passage defined through the body and a holding tab. The passage has an inner surface and a bottom opening defined in the bottom of the body. The holding tab is radially connected to the inner surface of the passage and has a holding hole defined through the holding tab. The valve disk is attached securely to the bottom of the body to close the bottom opening of the passage and has a holding rod formed on and protruding from the valve disk and engaging the holding hole in the holding tab. Accordingly, the valve disk can be automatically opened by the pressured air and automatically closed by the recoil force provided by the holding tab.

Abstract: A check valve, a retainer and a washer are secured to a valve body by inserting a pin therethrough and staking a distal end portion of the pin to form a staked portion. A restraining member is interposed between the washer and the staked portion. The fit clearance between the restraining member and the shank of the pin is set smaller than the fit clearance between the check valve, the retainer and the washer on the one hand and the shank of the pin on the other. Thus, when the distal end portion of the pin is staked, the deformation of the shank of the pin is restrained by the restraining member that defines a small clearance between the same and the pin. Therefore, it is possible to suppress the enlargement in diameter of a portion of the pin where the check valve is fitted and hence possible to prevent deformation of the check valve. Thus, stable valve characteristics can be obtained.

Abstract: An apparatus for facilitating fluid flow between an internal body structure and a device external to the body comprises a housing having proximal and distal chambers separated from one another by a wall and fluidly connected to proximal port and distal ports. The wall includes a valve selectively sealing first and second openings thereof and a canopy biased toward a sealing position sealingly surrounding the first opening. The bias of the canopy is set to define a first pressure differential at which the canopy is moved out of the sealing position to permit fluid transfer therepast in a first direction. A duck-bill stem extends through the second opening and includes a lumen extending therethrough with walls of the stem being biased toward a sealing position and configured so that, when a second pressure differential is applied at at least a second level, the first end opens to permit flow therepast.

Abstract: A self-sealing valve comprises a valve housing having a fluid conduit, a valve seat, a diaphragm and a support member. The valve housing is configured to pass fluid through the fluid conduit. The diaphragm provides a self-seal of the fluid conduit. The support member is configured to retain a portion of a diaphragm. The support member and diaphragm are configured to position the flexible diaphragm against the valve seat to seal the fluid conduit in a closed position of the self-sealing valve, and to facilitate movement of the diaphragm under a bias in a first direction away from the valve seat to an open position.

Abstract: A check valve made up of a substantially rigid portion and a substantially flexible membrane that is generally dome shaped. The substantially rigid portion includes one or more spokes that meet in the center of the rigid portion and one or more partial spokes extending part way to the center of the rigid portion. The dome shaped, substantially flexible membrane also includes one or more flexible spokes and one or more collapse zones. The completed check valve is made by connecting a center portion of the substantially rigid portion to a center portion of the dome shaped, substantially flexible membrane.

Abstract: A piston valve for improving the output efficiency of a diaphragm pump includes a central discharge base and a plurality of water inlet ports, wherein each of the discharge base and water inlet ports is provided with a top concave surface, and a plastic gasket is engaged with the concave surface of the water discharge base and a piston slice is engaged with the concave surface of each water inlet port so that a gap is defined between the gasket and its concave surface and a gap is also defined between each piston slice and its corresponding concave surface.

Abstract: A portable negative pressure wound therapy system includes a dressing assembly for positioning over a wound to apply a negative pressure to the wound and a canister assembly. The canister assembly includes a control unit having a vacuum source and a controller and a collection canister in communication with the dressing assembly operable to receive fluid from the wound. The collection canister has a filter assembly having a filter and a passageway between the filter and a wall of the collection canister. The collection canister also includes a canister interface having a suction port, an inlet port, and a channel. The vacuum source draws air through the suction port from the channel which draws air from the passageway connected to the channel, the air in the passageway is drawn from the collection canister through the filter, and the air in the collection canister is drawn through the inlet port.

Abstract: A check valve is housed in a valve chamber and includes a support portion and a flexible portion. The support portion extends along a principal axis thereof. The flexible portion is supported by the support portion in a manner extending from the principal axis. A diaphragm defines a lower wall of the valve chamber, and includes an inflow port for fluid at a position that is closed with the flexible portion when the flexible portion is displaced. A bottom plate defines an upper wall of the valve chamber, and faces the diaphragm with the flexible portion arranged therebetween. An uneven portion is provided in at least one of mutually facing areas of an upper principal surface, which is one of two principal surfaces of the flexible portion and faces the bottom plate, and a lower principal surface of the bottom plate, the uneven portion being partially uneven.

Abstract: A flow control apparatus 1 including a tubular outside member 4, a tubular inside member 10 placed in the outside member 4, and a valve member 20 is used. The inside member 10 includes a through-hole 14 passing through a side wall in a thickness direction and a contact portion 11 that is in contact with the outside member 4, which are arranged in that order in a direction from one opening 16 to the other opening 17. The valve member 20 is placed in the opening 17 of the inside member 10. The valve member 20 passes only a fluid supplied at a set pressure or higher in a direction from the one opening 16 to the other opening 17. The outside member 4 is formed so as to form a gap communicating with the through hole 14 between the outside member 4 and the contact portion 11 due to elastic deformation caused by an external force. The gap forms a flow path of a fluid in combination with the through-hole 14.

Abstract: An apparatus for cleansing and applying therapy or prophylaxis to wounds, in which irrigant fluid containing a physiologically active material from a reservoir connected to a conformable wound dressing and wound exudate from the dressing are recirculated by a device for moving fluid through a flow path which passes through the dressing and a means for fluid cleansing and back to the dressing. A biodegradable scaffold underlies the dressing on the wound bed to promote tissue growth. The cleansing means (which may be a single-phase, e.g. micro-filtration, system or a two-phase, e.g. dialytic system) removes materials deleterious to wound healing, and the cleansed fluid, still containing materials that are beneficial in promoting wound healing, is returned to the wound bed. The dressing, an assembly comprising the dressing and scaffold, and a method of treatment using the apparatus.

Abstract: A flexible, air-tight storage bag has an entrance opening for inserting an item to be stored into said bag with a releasably-closable seal across said entrance opening. A one-way valve assembly is installed in a surface of the bag and in fluid communication with the inside of the bag to allow air inside the bag to exit the bag. The valve has an outer portion with a conical or curved exterior surface having an apex and a plurality of exit holes adjacent the apex so a vacuum cleaner nozzle can be placed over the exit holes. The outer portion has a conical or curved surface with at least one ridge thereon or groove therein extending away from the apex and beyond the exit holes to reduce the suction. A circular flange in the valve is located so air passes through the flange. A flexible diaphragm is placed in the circular flange so the diaphragm abuts an edge of the flange to vary the flow of air.

Abstract: The embodiments of the present tracheostomy valves include a flexible diaphragm abutting a rib shaped substantially as a flat plate. Opposite the rib, the diaphragm abuts a boss and forms an uninterrupted seal therewith. As the tracheostomized patient inhales, the diaphragm bends about the rib, interrupting the seal and allowing air to flow smoothly into the valve. The features of the various embodiments contribute to a positive seal at all times except during inhalation, and low resistance to airflow through the valve during inhalation.

Abstract: An underwater breathing device, such as a snorkel, may include an exhalation valve. The exhalation valve is configured to produce positive end-expiratory pressure in the airway of a user of the underwater breathing device in order to reduce the overall work of underwater breathing. The exhalation valve includes a plate defining an exhalation port. The exhalation valve also includes a flexible membrane that is sealable against a surface of the plate and is sized and positioned to be capable of sealing the exhalation port. The flexible membrane is configured to have a sealed position in which the flexible membrane seals the exhalation port such that substantially no exhaled air escapes the snorkel. The flexible membrane is also configured to have an unsealed position in which exhaled air escapes the snorkel.

Abstract: A positive pressure one way medical valve contains an inlet (10), outlet (11), an internal flow path between the inlet and the outlet and a plunger (12) movable between a retraced sealing position, where backflow is reduced or prevented and an extended open position, where fluid can flow from the inlet to the outlet. The plunger is moved from the retraced to the extended position by insertion of a tip onto the inlet (10). A variable volume chamber (23) is defined partially by an elastomeric member (14) that is stretched, when plunger is in the extended position and reduced, when the plunger is in the retraced position so to increase or decrease the volume of the chamber respectively. A valve (50), which is movable between open and closed positions by the presence or absence of fluid passing through the inlet, immediately seals the flow pathway before the plunger is retraced.

Abstract: A self-sealing valve comprises a valve housing having a fluid conduit, a valve seat, a diaphragm and a support member. The valve housing is configured to pass fluid through the fluid conduit. The diaphragm provides a self-seal of the fluid conduit. The support member is configured to retain a portion of a diaphragm. The support member and diaphragm are configured to position the flexible diaphragm against the valve seat to seal the fluid conduit in a closed position of the self-sealing valve, and to facilitate movement of the diaphragm under a bias in a first direction away from the valve seat to an open position.

Abstract: Fluid release apparatus (26) for the release of fluid from the interior of a rotating and/or pressurized body (16;18;102;104), the apparatus comprising a core member (28) having a chamber wall (44) disposed thereabout so as to define an open chamber (30) about said core member. The apparatus further comprises a chamber closure (48) mounted about said core member (28), said closure being resiliently deformable between an at rest state in which the closure contacts the chamber wall (44) and an actuated state in which the closure is spaced there-from, wherein the chamber has an aperture (32;35;55) for receiving liquid phase fluid from the interior of said rotating body. Upon build up of sufficient liquid in said chamber (30) the closure (48) moves to said actuated state so as to release liquid from the interior of the body.

Abstract: The invention relates to a device for treating bladder emptying dysfunctions of a human, in which a catheter that can be inserted into the urethra is provided with a bladder emptying channel and with a balloon arrangement, which serves to seal the bladder and to hold the catheter inside the bladder lumen and which can be filled with a fluid. In addition, an automatically closing valve having an elastically held closure part is provided in a proximal end area of the catheter and is connected via a connecting channel filled with an actuating fluid to an actuating balloon placed at the distal end section of the catheter. Without the use of mechanical means, the closure part can be lead out of a sealing system solely due to a hydraulic action effected by the actuating balloon via the hydraulic pressure built up in the connecting channel at said proximal end section.

Abstract: A coupling assembly includes a female unit and a male unit which is removably connected with the female unit. A valve unit is located in the female unit and includes a core with two flexible disks on two ends thereof. A flange extends radially outward from a lower end of the core and is rested on a support frame in the female unit. The core extends through a through hole in a lower end of sleeve in the female unit. A plurality of paths are defined through the lower end of the sleeve so that by shifting the core to let either of two flexible disks to seal the paths in one direction, the direction of fluid flow can be controlled. The movement of the core is made by moving the sleeve.

Abstract: A pneumatically operated device. The pneumatically operated device comprises a movable member disposed within a housing. The movable member is operable to control operation of the device. Pressurized air is directed to a first side of the movable member to drive the movable member in a first direction to operate the device. The pneumatically operated device comprises a check valve disposed through an opening in the housing to enable air to vent from a second side of the movable member. The check valve may comprise a flexible cover extending over the opening and biased against the housing to form a seal.

Abstract: An apparatus for cleansing and applying therapy or prophylaxis to wounds, in which irrigant fluid containing a physiologically active material from a reservoir connected to a conformable wound dressing and wound exudate from the dressing are recirculated by a device for moving fluid through a flow path which passes through the dressing and a means for fluid cleansing and back to the dressing. A biodegradable scaffold underlies the dressing on the wound bed to promote tissue growth. The cleansing means (which may be a single-phase, e.g. micro-filtration, system or a two-phase, e.g. dialytic system) removes materials deleterious to wound healing, and the cleansed fluid, still containing materials that are beneficial in promoting wound healing, is returned to the wound bed. The dressing, an assembly comprising the dressing and scaffold, and a method of treatment using the apparatus.

Abstract: An anti-reflux drainage device includes an elongated member defining a lumen, and a valve disposed along the elongated member. The valve can include one or more lumens in fluid connection with the lumen of the elongated member, a socket, a shaft disposed in the socket, and a stopper connected to the shaft that occludes the second lumen when exposed to retrograde pressure. Another such device includes an elongated member and a ball valve. The ball valve can include a seat and a shoulder defined by the elongated member, and a ball disposed in the elongated member between the seat and shoulder that occludes lumen when exposed to retrograde pressure.

Abstract: A oneway valve for an automatically inflatable air cushion includes a valve body having an air inlet port and an air outlet port, a valve seat mounted in the valve body and formed with a plurality of conducting holes connected to the air inlet port and the air outlet port, and a valve stem movably mounted in the air inlet port and movable to seal the conducting holes. Thus, the oneway valve prevents the air from leaking from the air cushion during the inflation process and prevents the air from entering the air cushion during the deflation process, so that the air cushion is inflated and deflated completely and exactly.

Abstract: An irrigation pipe with a plurality of connector elements adapted for attachment of lateral branches thereto, where the connector elements are integrally fitted to the pipe's wall during the manufacture. Connector elements may be fitted open and be adapted for closing after manufacture if not intended for use, or may be fitted closed and be adapted for opening after manufacture to enable the attachment. A method of production of such irrigation pipe from a strip of flexible weldable or bondable material includes fitting integrally the connector elements to predetermined locations on the strip, with or without punching the strip; bending or twisting the strip so as to juxtapose or overlap lateral edges thereof; and welding or bonding integrally the edges so as to obtain a closed pipe section.

Abstract: A process for remanufacturing valve bodies such as fuel injector valve bodies includes receiving a salvaged valve body having a first segment, a second segment and a middle segment which includes a valve seat and a guide bore for a valve therein. The process further includes removing material of the valve body where the valve seat and the guide bore are disposed, and positioning an insert within the valve body in place of the removed material. A new valve seat and a new guide bore are then machined in the insert, including locating for machining the new valve seat and new guide bore on a timing face of the valve body.

Abstract: A valve mechanism (3) includes a valve seat member (31) having a guiding portion (319); a valve member (32) having a valve body (321), a guiding shaft (322), and a supporting shaft (323); and a sub-valve member (33) having a sub-valve body (331) and a connecting portion (332). The valve body (321) and the sub-valve body (331) ascend together by pressing the fluid-storing portion (11); and the valve body (321) travels to an open position and the sub-valve body (331) travels to a detached position. In this state, when a pressure applied to the fluid-storing portion (11) is removed, the valve body (321) and the sub-valve body (331) descend together; and after the sub-valve body (331) travels to a contact position, the valve body (321) travels to a closed position.

Abstract: A fluid priming pump in combination with a reed valve for the control of incoming and exiting fluid flow is disclosed. The fluid priming pump includes a pump body and a movable plunger with the reed valve positioned adjacent the pump body. Two embodiments of the reed valve are disclosed, including an integral design where the unitary valve panel is insert molded with the valve body. In the second embodiment, the unitary reed valve is based on co-injection molding technology. Each reed valve design comprises only two component parts and becomes operable without the need for any additional mechanical components or fasteners. Pressure forces created by the fluid priming pump govern the opening and closing of valve panel portions for controlling the incoming and exiting fluid flow through the fluid priming pump.

Abstract: A flow valve having sealing member having a first condition for engaging a housing to prevent back flow and a platform for obstructing a flow passage through the flow valve with the platform supporting the sealing member in an out-of-the-way condition to allow fluid to flow through the flow valve.

Abstract: The invention relates to a fluid control value, such as an umbrella valve (40), to be inserted in a valve housing (140), said valve comprising a sealing element (44) having a sealing surface and projecting in a radial direction for sealing one or more fluid openings (145) in said valve housing, which sealing element is responsive to fluid pressure to open and close to control the fluid flow through the fluid openings. The sealing element is provided with at least one recess (47) on the surface of the sealing element such that at least one sealing end (45) is defined on the sealing element extending between the recess and the periphery of the sealing element, said sealing end carrying the sealing surface. The fluid control valve according to the invention is an excellent pressure relieve valve allowing a large flow at a high opening pressure.

Abstract: A one-way fluid valve may include a valve base having a central portion with a post and an outer portion having a seat, a diaphragm having a central portion with an opening for receiving the post of the valve base, the diaphragm having a diameter of at least about 1.375 inches, and a cover having a retainer for securing the diaphragm to the valve base at the central portion of the valve base.

Abstract: A yard hydrant having a valve body with a drain port and a check valve mounted adjacent to the drain port to allow water to flow from the hydrant through the drain port to the ground and prevent ground water from flowing into the hydrant through the drain port and contaminating the water source.

Abstract: A valve comprising an inlet port, an outlet port, an exhaust port and a diaphragm disposed between the inlet and exhaust ports which is moveable, in response to air pressure within the valve, between a first position in which it seals the exhaust port and a second position in which the exhaust port is open, there being one or more projections associated with the exhaust port on which the diaphragm is able to rest in its first position.

Abstract: A one-way, self-actuating, and springless check valve for high purity fluid handling system and components, including pumps and fluid passageways, includes fixed, but resilient, deformable valve member that cooperates with a valve seat to stop fluid flow in one direction and to bend away from the valve seat when fluid pressure exceeds a predetermined level. The check valve is deployed in a high purity metering pump.

Abstract: A one-way valve allows air to be drawn from a collapsible, flexible, airtight bag using a vacuum source. When the vacuum source is removed, the one-way valve prevents air from re-entering the bag. The valve assembly comprises a base, a valve element supported by the base, and a cap fitted onto an end of the base that is disposed in the exterior of the bag. The base comprises a flange that is disposed in the interior of the bag and is joined to a peripheral area surrounding a hole in one wall of the bag. One surface of the flange has a series of concentric heat-concentrating circular beads for speeding up the conduction heat sealing operation by which the valve assembly is attached to the bag. The valve cap is provided with a circular wall that presses the diaphragm of the valve element against a circular bead on an annular seat formed on the base for supporting the valve element.