Abstract: An over-molded fluid control value for use in fluid delivery systems. An embodiment of the fluid control valve includes a rigid substrate having a opening defined therein, and a valve structure fabricated of an elastomeric material. The valve structure is over-molded over at least a portion of the rigid substrate and including a valve portion extending over the opening, the valve portion movable in response to a differential fluid pressure to allow fluid flow.

Abstract: The present invention relates generally to a non-return valve (10) comprising a valve body (12) and a valve membrane (14). The valve body (12) is generally tubular and includes an elongate passageway (16) having an inlet and an outlet defined at its opposing ends (18) and (20), respectively. The valve membrane (14) is in the form of a conical-shaped diaphragm formed integral with the tubular valve body (12). The diaphragm (14) is configured as a generally conical-shaped element having a collapsible opening or aperture (22) located at or adjacent its apex. The conical diaphragm (14) is oriented with its apex in a downstream flow direction. The resiliently flexible material from which the diaphragm (14) is constructed ensures that the diaphragm (14) in a collapsed condition obstructs or closes the aperture (22) to prevent fluid flowing in a reverse direction towards the inlet (18).

Abstract: The valve comprises a flexible resilient valve member which is positioned in a flexible fluid line in a fluid-tight relationship therewith. An actuating element, such as a ring-shaped member, surrounds the valve member, and an actuating coil is positioned adjacent the ring member. An electrical control signal energizes the coil in operation, producing a magnetic field which moves the actuating element to deform the valve member, opening the valve. Termination of the electrical signal permits the valve member to return to its normal closed position arrangement. A feedback control system is provided for the valve which includes providing pre-established limits on time and volume of fluid delivery. Determinations are successively made as to whether such limitations have been met, and the control valve is closed when one such limitation has been met.

Abstract: A collapsible dispensing system for flowable materials is disclosed. A conical one-way valve assembly of coaxially conforming parts is attached to a collapsible container. An enclosing sleeve seals an elastomeric sheath to a valve body. Flowable materials are dispensed under positive pressure without back flow of external gases and contaminants, even after repeated dispensing of container contents. This enables flowable materials that are susceptible to oxidation and contamination to be reformulated without antioxidants and/or preservatives. The collapsible multiple dose dispensing system maintains the integrity and sterility of flowable materials, thereby prolonging product use life. The system takes advantage of a conical design, allowing for quicker, easier and cheaper manufacturing and assembly.

Abstract: A large diameter check valve has an upstream inlet part mountable on a discharge end of a conduit, a downstream outlet part adapted to prevent backflow of fluid through the check valve, and a transition part located between the upstream inlet part and the downstream outlet part. A support is included in the check valve to prevent drooping of the check valve via a cantilever effect. A method for supporting a check valve is also disclosed.

Abstract: A hemostasis valve for sealing around elongate medical instruments inserted into the body. The valve has an elastomeric valve body adapted to be received with a rigid introducer housing and seal thereagainst. The valve body has a distal end and a proximal end, and a cavity opening at the proximal end to receive the medical instruments. A pair of duckbill walls extends in the distal direction and converges and meets at a slit opening. The slit opening has an H-shape that effectively seals around multiple sizes of medical instruments, from the smallest catheter to the largest bore catheters. The duckbill walls may be planar or curvilinear, and may be reinforced with one or more ribs extending outward therefrom.

Abstract: A vacuum demand valve for delivering a flowable material is disclosed. The valve has a housing having a proximal end, a distal end, an intermediate segment therebetween defining a passageway wherein the flowable substance can flow from the proximal end to the distal end. The housing can be a tubing. A valve member is located along the intermediate segment. The valve member has a closed condition wherein the flow of the flowable material from the proximal end to the distal end is stopped and an open condition wherein the flow of the flowable material from the proximal end to the distal end is unstopped. The valve member is biased in the closed condition and is responsive to a partial vacuum provided by the user through the passageway for placing the valve member in the open condition.

Abstract: A bidirectional valve comprising a flexible member with an aperture formed therein. The flexible member reacts to differential pressure thereacross by deforming, thereby causing the inside surfaces of the aperture to separate and create a vent path. The bidirectional valve can be tuned to open the aperture in reaction to varied differential pressures thereacross, thereby allowing a fluid to pass through the aperture.

Abstract: An over-molded fluid control value for use in fluid delivery systems. An embodiment of the fluid control valve includes a rigid substrate having a opening defined therein, and a valve structure fabricated of an elastomeric material. The valve structure is over-molded over at least a portion of the rigid substrate and including a valve portion extending over the opening, the valve portion movable in response to a differential fluid pressure to allow fluid flow.

Abstract: A support mechanism for a tide gate valve having an internal cavity, wherein the support mechanism includes a support body receivable in the tide gate valve cavity to help prevent the tide gate valve from collapsing in on itself when subjected to backflow pressure. The support mechanism is positioned adjacent to a pipe end and can take the shape of a ring having legs or flanges, a cage, a partial or more than partial cone, or other suitable shape. Moreover, arms can extend from the ring to provide further support and orifices can be added to the support mechanism to increase or decrease flow characteristics.

Abstract: The present invention relates generally to a non-return valve (10) comprising a valve body (12) and a valve membrane (14). The valve body (12) is generally tubular and includes an elongate passageway (16) having an inlet and an outlet defined at its opposing ends (18) and (20), respectively. The valve membrane (14) is in the form of a conical-shaped diaphragm formed integral with the tubular valve body (12). The diaphragm (14) in configured as a generally conical-shaped element having a collapsible opening or aperture (22) located at or adjacent its apex. The conical diaphragm (14) is oriented with its apex in a downstream flow direction. The resiliently flexible material from which the diaphragm (14) is constructed ensures that the diaphragm (14) in a collapsed condition obstructs or closes the aperture (22) to prevent fluid flowing in a reverse direction towards the inlet (18).

Abstract: A carburetor for a small internal combustion engine has a manual priming fuel pump with a resilient valve for allowing fuel flow in a first direction and for preventing fuel flow in a second direction. The resilient valve is reinforced with longitudinally extending ribs to prevent recirculation of fuel through an outlet orifice of the valve in a running engine. The outlet orifice is defined by a distal end of a tubular portion of the valve press fitted and projecting into an outlet passage that communicates with a pump chamber defined by a resilient domed cap. The ribs project laterally outward from the tubular portion within the outlet passage. Integral with an opposite end of the resilient valve is a head which flexes outward to open an inlet passage which then communicates with the pump chamber.

Abstract: An improved one-way valve for use in breathing apparatus comprising a valve housing, a one-way valve disposed in the valve housing that is in sealing contact to the valve housing, and a flexible retainer ring. The flexible retainer ring allows the one-way valve to unseat a greater distance within the valve housing thereby allowing an increase in the amount of expiratory gas through an exhaust port of the valve housing and the flexible retainer ring also prevents the deformation and inversion of the one-way valve thereby maintaining the proper flow of both respiratory and expiratory gases.

Abstract: A check valve which tends to be free from clamp damage and has a satisfactory pressure loss balance even if being used with a gasohol.

Abstract: A check valve which tends to be free from clamp damage and has a satisfactory pressure loss balance even if being used with a gasohol. The check valve comprises a fluorosilicone rubber having: (A) a tear strength of not smaller than 150 N/cm; (B) an initial 100% tensile stress of not greater than 3.5 MPa; (C) a 100% tensile stress of 1.8 to 3.0 MPa after immersion in a gasohol; and (D) a volume swell of not greater than 35% after immersion in the gasohol.

Abstract: A combination valve including a metal sleeve and a valve body. The valve body is formed of a resilient material and insert bonded or vulcanized to the metal sleeve and includes a cylindrical elongated member defining a passageway therethrough and an annular umbrella portion integrally extending from the elongated member. The elongated member is disposed within the metal sleeve and has converging flexible lips. The metal sleeve includes a plurality of prongs at one end and the valve body includes a top surface. The prongs of the metal sleeve extend to the top surface of the valve body, whereby the valve can be press-fitted into location without damaging the valve body. Between the prongs of the metal sleeve are gaps which permit the molding material to flow from the umbrella portion to the elongated member during the molding of the combination valve.

Abstract: A pipe element possessing a longitudinal axis (2) along which a rigid tubular part (3) and a flexible tubular part (4), together constituting a single piece, extend. The rigid part (3) has one end presenting a substantially radial connection surface (8) for connection to an end portion (11) of the flexible part (4), and an additional connection surface (10) on the radial connection surface (8) connecting to the end portion (11) of the flexible part (4), at least a part of the additional connection surface (10) extending substantially parallel to the longitudinal axis (2).

Abstract: The invention relates to a non return valve for an airbag of a vehicle passenger retention system, which is provided with a connection hose between two chambers of the airbag, wherein in the connector hose a fabric inlay is accommodated. The fabric inlay subdivides the connection hose into a flow passage between the first and the second chamber and a pressure chamber which is in connection with the second chamber. As soon as the internal pressure in the first chamber is greater than that in the second chamber the fabric inlay opens the flow passage. If on the contrary the internal pressure in the second chamber is greater than that in the first chamber the fabric inlay closes off the flow passage by means of the internal pressure which acts in the pressure chamber.

Abstract: A check valve having an upstream inlet part mountable on a discharge end of a conduit, a downstream outlet part adapted to prevent backflow of fluid through the check valve, and a transition part located between the upstream inlet part and the downstream outlet part. A longitudinal dimension of the downstream outlet part extending in a direction transverse to a direction of flow is at least approximately 1.57 times the diameter of the upstream inlet part.

Abstract: A head gasket which acts, when clamped between a head and a cylinder block of an internal combustion engine, to form a seal around at least one lubricant or hydraulic fluid passage which extends between the head and the block. The gasket also comprises a non-return valve which extends across said passage and allows flow of liquid in said passage towards the head but prevents flow of liquid in said passage towards the block.

Abstract: The invention in the simplest form is a dispenser valve with an increased flow capacity. The device is particularly suited for dispensing liquids, and has a plurality of individual thin and streamlined elevated standoffs that serve as the spring seat, lowering flow losses and providing a larger flow path area or particulate matter included in the liquid. In addition, the ball check valve chamber is funnel shaped, creating an efficient flow for the dispensing liquid regardless of the viscosity or particulate of the liquid. The unit increases discharge capacity, reduces clogging, improves efficiency, and allows the unit to dispense highly viscous and gritty materials.

Abstract: A water heater includes a spud connected to a tank wall and surrounding an opening in the tank wall. A support surface is provided in the spud, preferably by the tank wall, that supports a heat trap within the spud. A pipe is inserted into the spud and a portion of the heat trap is disposed between the end of the pipe and the support surface. The heat trap preferably includes and elongated portion that acts as a dielectric between the tank and the pipes.

Abstract: A valve device, in particular a window and lens cleaning device in motor vehicles, comprising a housing (1) with a duct (2) and at least one nozzle (3), and also a tubular connecting piece (4) for feeding a pressurized fluid, in particular a cleaning liquid, into the duct and to the nozzle. The connecting piece (4) is provided at its nozzle-side end with a nonreturn valve which blocks a return flow from the nozzle to the connecting piece wherein, the connecting piece (4) is open at its nozzle-side end. The nonreturn valve comprise an elastic shaped part (8) with a mouth which is normally closed and can be opened by the pressure of the cleaning liquid.

Abstract: The present invention relates to a non return valve which is provided by welding two lines in two flat upon each other lying film surfaces, which are then folded towards each other and after that they are joined together around the outer edges except the opening channel so that over pressure is formed when the container is filled completely or partly and then the non return valve starts to operate with safe sealing. The opening channel is formed between two against each other lying sections of film material, which sections extend from the outside of the container into it and are joined together right up to the opening channel.

Abstract: An inflation nozzle structure of an infatable envelope. The inflatable envelope is formed by two envelope membranes the peripheries of which are adhered to each other. The inner membranes are adhered to an edge of the envelope membranes and inward extend from the edge. The two inner membranes are adhered to each other to define an air passage serving as the inflation nozzle. An isolating membrane is sandwiched between the inner membranes near an outer opening of the air passage. Two faces of the isolating membrane are formed by two kinds of membranes with different melting points. When thermally pressed, one face with lower melting point of the isolating membrane is thermally adhered to inner wall of the air passage, while the other face with higher melting point is not adhered. Therefore, when thermally pressing and forming the inflatable envelope and the inflation nozzle, the operation can be continued and speeded without complicated processing procedure.

Abstract: A valve device, in particular a window and lens cleaning device in motor vehicles, includes a housing (1) with a duct (2) and at least one nozzle (3), and also a tubular connecting piece (4) for feeding a pressurized fluid, in particular a cleaning liquid, into the duct and to the nozzle. The connecting piece (4) is provided at its nozzle-side end with a nonreturn valve which blocks a return flow from the nozzle to the connecting piece, wherein the connecting piece (4) is open at its nozzle-side end. The nonreturn valve comprises of an elastic shaped part (8) with a mouth which is normally closed and can be opened by the pressure of the cleaning liquid.

Abstract: A vacuum tank assembly has a low volume configuration so that it can be used in boats and recreational vehicles where space is at a premium. A stack of components, with a waste tank at the bottom, then a vacuum tank with directly connected vacuum pump, and one or more fresh water tanks, is located remote from a vacuum toilet, with a discharge from the toilet (below a vacuum-tight ball valve) connected to the vacuum tank, which is in turn connected to the vacuum pump, in turn connected to the waste tank. A submersible centrifugal pump may be provided mounted to a cap of the water tank, with an anti-siphon device associated with it. The vacuum tank is of high density polypropylene having flat walls, with no continuous flat surface more than 80 square inches. Lipless duckbill check valves are provided on opposite sides of the vacuum pump, the valves of elastomeric material having a ratio of the wall thickness to thickness of the sealing edges of about 1:1.

Abstract: A duckbill valve is provided which includes a hollow cylindrical elastomeric body with first and second ends. The first end has walls parabolically tapering to an elongate slit, the slit being surrounded by an upper and lower lip. The second end has a non-uniformly round (e.g. oval) outer wall terminating in an open mouth. When inserted into a perfectly round apertured fitting, the non-uniformly round outer walled elastomeric body is bowed to form-fit the round configuration thereby forcing shut the lips and slit. Upon increased air pressure within the elastomeric body, the slit is forced open. In a second embodiment, the inner wall of the second end may be non-uniformly (e.g. oval) round. Insertion of a round tubular fitting within the non-round inner wall of the elastomeric body also achieves a bowed form-fit configuration which forces shut the lips and slit.

Abstract: A duckbill valve is provided which includes a hollow cylindrical elastomeric body with first and second ends. The first end has walls parabolically tapering to an elongate slit, the slit being surrounded by an upper and lower lip. The second end has a non-uniformly round (e.g. oval) outer wall terminating in an open mouth. When inserted into a perfectly round apertured fitting, the non-uniformly round outer walled elastomeric body is bowed to form-fit the round configuration thereby forcing shut the lips and slit. Upon increased air pressure within the elastomeric body, the slit is forced open. In a second embodiment, the inner wall of the second end may be non-uniformly (e.g. oval) round. Insertion of a round tubular fitting within the non-round inner wall of the elastomeric body also achieves a bowed form-fit configuration which forces shut the lips and slit.

Abstract: Disclosed herein are check valve assemblies with enhanced back flow protection. There are at least two duckbilled check valves, each having an inlet at one end and an elastomeric bill formed at an opposite end, the bill having opposed lips and an outlet openable by a flexing of the lips apart. The bill of the first duckbill check valve is telescoped into and retained in the inlet of the second duckbilled check valve (e.g. by a jam fit or snap fit connection). These assemblies can be positioned in compact conduits such as those found in garden hose outlet nozzles.

Abstract: A system is provided for contamination free delivery and control of a flowable medium contained in an enclosed flow path or a container. The system is highly scalable in size and works even with viscous fluids which are difficult to flow. The device enables a flowable material to be formulated without anti-oxidants, preservatives or anti microbial agents. This provides the advantage of an enhanced therapeutic effect for many medications, especially those which are considered labile. The device also preserves the integrity and sterility of a flowable material contained in an enclosed flow path such as blood plasma, and is effective against microbial as well as viral challenges. The device can be used to maintain the carbonation of a carbonated flowable medium. The system provides a seat and reversibly deformable seal disposed in the flow path; wherein the seal and seat are moveable between a closed and open state upon the deformation of the seal.

Abstract: A squeeze-type container package that comprises a flexible resilient container body and a self-sealing closure assembly mounted to the mouth of the container body. The self-sealing closure assembly includes a dispensing valve of one-piece integrally molded elastic construction having an annular base, an internal wall portion that extends radially inwardly and axially from the base, and a mouth portion that includes a slit opening oriented diametrically of the annular base. Internal stresses within the wall portion bias the slit to the closed position. An annular lip that extends radially outwardly from the valve cooperates with an annular internal rib on the closure for venting the interior of the container body to atmosphere when the container body is released following dispensing of product.

Abstract: Disclosed herein are closures that are formed via an injection molding process with a thin breakable web. When they are first placed in a fluid conduit and exposed to line pressure the web will break open so as to thereby create a duckbilled type check valve. Thus, the closure can provide a seal during long-term storage prior to use. However, once used it functions as a check valve.

Abstract: A valve includes an inlet and outlet housing, a flexible one-way valve, and a collar. The flexible valve is locked between the housings. The collar is attached to the inlet housing and extends into the flexible valve. As fluid flows through the valve, the collar supports the flexible valve and prevents collapse due to back flow pressure.

Abstract: A pressure flushing system for use in a toilet tank includes a housing with a water inlet conduit, an air and water inlet assembly connected to the conduit and to the housing, and a water outlet for the housing. There is a flush valve within the housing for controlling flow of water from the inlet to the housing outlet. The air and water inlet assembly includes a chamber, with a water inlet connected to the chamber, and an outlet connected to the chamber. There is an air inlet accessible to air at atmospheric pressure and a passage between the air inlet and the chamber. A check valve is located in the passage, with the check valve opening in response to a venturi effect caused by water flow through the chamber to draw air into the chamber to mix with water flowing through the chamber and to the outlet. The check valve includes an elastomeric sleeve positioned within the passage and having normally closed flexible lips extending toward the chamber.

Abstract: A membrane-type inflation nozzle applicable to an inflatable envelope. A release sheet is disposed between two nozzle membranes at an opening of the nozzle. An adhesive material is disposed between inner membrane walls of the opening of the nozzle. One end of the release sheet is positioned between the adhesive material and the other membrane wall. The other end of the release sheet extends out of the opening. When inflating the envelope, the release sheet is torn away from the nozzle opening and then the envelope is fully inflated. Therefore, an internal pressure of the envelope makes the nozzle self-close. In addition, the adhesive material at the nozzle opening is able to adhere corresponding inner membrane walls to each other so as to achieve a more tightly air-sealing effect.

Abstract: An air diffuser system contains a manifold and a plurality of elastomeric "duckbilled" check valves. The manifold is constructed from a conduit material and can be arranged in many different configurations. The valves are made from an elastomeric material, such as rubber, preventing the valves from being clogged with sludge, sediment, or other debris commonly found in waste treatment water. Additionally, the valves can be bored with predetermined orifice sizes, allowing the volume and pressure of escaping air to be determined prior to installation. To make installation of the valves easier, various types of coupling devices may be used to attach the valves to the manifold. Examples of coupling devices include restrictive orifices, "Y"-shaped conduits, and nipple conduits. Multiple valves can also be fabricated on a common cuff prior to installation.

Abstract: An inventive valve member, and associated method of making, for use in a bag for holding a gas or liquid, the bag including a main body having a stem portion, the main body defining an interior space and formed from a front and back sheet sealed together about a peripheral edge. The stem defines an inlet aperture at a free end thereof. A valve member has a width dimension positioned in the stem for use in inflating the main body, the valve member including a flexible front layer and a flexible back layer. The front layer is adjacent to the front sheet, and the back layer is adjacent to the back sheet. Both the front and back layers define opposing elongated edges. The front and back layers are attached together along the elongated sides to form a seal. The valve member has an inlet end and an outlet end, the inlet end is adjacent to the inlet aperture, and the outlet end is positioned in communication with the interior chamber of the main body.

Abstract: An asymmetrical check valve has an inlet end, a transition part and an outlet end, with a pair of vertical lips facing one another. The lips may be flat or they may be curvilinear. The check valve is asymmetric about a horizontal longitudinal plane through the check valve. The bottoms of the transition part and outlet end may be aligned, with a major portion of the lips extending above the horizontal plane. It is thus possible to install conventional or wide bill check valves in installations with little or no clearance between the outlet end and ground level.

Abstract: A valve assembly for permitting fluid flow in a first direction and for preventing fluid flow in a second direction opposite to the first direction. The valve assembly includes an upper housing, a lower housing coupled to the upper housing to form a generally axially extending housing assembly, and a valve seating section defined within an inner peripheral portion of the lower housing. The valve seating section includes an axially extending inner peripheral surface and a transversely extending surface substantially normal to the axially extending inner peripheral surface. A valve member is seated within the valve seating section of said lower housing. The valve member includes a flange that extends from the valve member in a transverse direction and defines an axially oriented outer peripheral surface thereof.

Abstract: A dispensing valve for dispensing a liquid including a valve housing having a fluid inlet and a fluid outlet, an armature positioned in the housing, the armature being reciprocal between an open and closed position, a sealing disk fixedly secured to a sealing end of the armature for sealing engaging a valve seat positioned about the fluid outlet for providing selective fluid communication between the fluid inlet and the fluid outlet and a flow control device positioned in the fluid outlet for providing a substantially quiet and constant flow of liquid through the fluid outlet. The flow control device including a high pressure region and a low pressure region downstream of the high pressure region with the high pressure region of the flow control device including a flow control orifice having an inside diameter less than a diameter of the fluid outlet and the low pressure region of the flow control device intersects the high pressure region of the flow control device.

Abstract: The present invention relates to a self-sealing flexible plastic valve for a non-latex balloon, to a balloon incorporating such a valve, to a method of manufacturing such a valve, and to a method of manufacturing a balloon incorporating such a valve. The valve is made from two flexible plastic strips, bonded together along the side edges to define a valve passageway or tube, and having an open inlet end and an open outlet end. The inlet end of one or both valve strips flares or otherwise curls outwardly to facilitate opening of the valve to insert a gas supply mechanism to inflate the balloon.

Abstract: There is provided a self-sealing valve structure. The structure has a first sheet of thermoplastic material and a second sheet of thermoplastic material in face-to-face relationship with each other and are secured together along a portion of the longitudinal edges of the sheets and define a passageway therebetween. In one embodiment, the passageway has an air inlet end and an air outlet end. The air outlet end has at least a pair of air outlets located at each of the longitudinal edges of the valve and directing the incoming air through each of the longitudinal edges near the outlet end of said valve. The air outlets are formed by an air deflector blocking the end of the outlet which is preferably of a U-shape or a V-shape. In another embodiment, the passageway directs air through only one longitudinal edge of the valve.

Abstract: A urinal for men who cannot use a toilet or are otherwise incapacitated has a canister with a removable spout. A manual seal in the spout can be manipulated between open and closed positions by a trigger on the exterior of the spout, and locked into the open position by a releasable locking arm. A vertically-arranged opening in a dome seal attached to the spout helps prevent spillage in the event the urinal is knocked onto its side when the manual seal is locked open. The spout is attached to the canister by a releasable collar, and thus can be easily separated for cleaning.

Abstract: An inversion-resistant check valve or tide gate valve has a sleeve bounding a longitudinally extending, flow-through passage for fluids. The sleeve has an intermediate region and an upstream fluid inlet end region mountable on a discharge end of a conduit which is elongated along a longitudinal first axis of symmetry. The sleeve also has a downstream fluid outlet end region comprised of two or more thin and flexible lips which are opposed to each other and which are pre-formed to define a bill which is curvilinear. The lips are thinner and more flexible than the intermediate region. The curvilinear bill ensures sealing of the thinner, more flexible lips, allows easier opening of the valve, and reduces the likelihood of gapping in the lips. Unwanted backflow through the check valve is thereby prevented.

Abstract: A value device for connecting a container filled with a flowable material to an applicator device for dispensing the flowable material comprises a unitary, essentially cup-shaped housing 1 having an axially extending flow passage 9 in the base thereof. A valve seat 50 is formed around the inner end of the flow passage 9, radially inwardly of the axially extending wall 8 of the housing 1. A unitary, essentially cylindrical valve member 2 is received in the open end of the cup-shaped housing 1. This has an axially extending flow passage 16 therein in axial alignment with the flow passage 9 in the up-shaped housing 2. A valve disc 14 is positioned over the inner end of the flow passage 16, but spaced therefrom. The valve member 2 is axially displaceable relative to the housing 1 upon rotational movement of the housing 1 so as to effect engagement of the valve disc 14 with the valve seat 50 to close the flow passage 9 in the housing 1 and disengagement to open the flow passage 9 in the housing 1.

Abstract: An inversion-resistant check valve or tide gate valve which comprises a sleeve bounding in a longitudinally-extending flow-through passage for fluids. The sleeve has an upstream fluid inlet end region mountable on a discharge end of a conduit which is elongated along a longitudinal axis of symmetry. The sleeve also has a downstream fluid outlet end region comprised of two or more lips which are opposed to each other and symmetrically arranged relative to the axis, wherein the lips extend a defined length along the axis, the defined length being within the range of about 1:1.5 to 1:9 times the diameter of the conduit.

Abstract: A temperature sensing apparatus (10) adapted for sensing the temperature of a food item or the environment in an oven includes a body (12) which encloses a chamber (38). The chamber houses an indicator (22) which is viewed through a frangible glass pane (34). Slight amounts of water vapor that infiltrate into the chamber during washing are vented when the apparatus is placed in a high temperature environment. A resilient member (70) having a lip portion (74) is normally in abutting relation with an outer case wall surface (48). When pressure builds in the chamber during heating due to rapid expansion of the water vapor, the pressure applied through an opening (40) acts against the lip portion of the resilient member. When the pressure rises to a sufficient level, it deforms the lip portion away from the adjacent wall surface whereby pressure is relieved to atmosphere. The pressure in the chamber is relieved before it reaches a level that may fracture the frangible glass pane or cause other damage.

Abstract: A check valve provides a one-way fluid passage from without to within a fluid bladder formed by a pair of plastic sheets sealed together about their periphery. The check valve is formed by a pair of superimposed films of thermoplastic material, generally equal in length, thermally bonded together at predetermined areas to define the fluid passage throughout the length of the valve. The inlet end of the valve has a V-shape edge with the apex pointing in a direction opposite the one-way fluid flow. Each of the films, adjacent the V-shape edge of inlet end, is sealed to one of the outer sheets where the valve enters the bladder by a seal line of similar V-shape. Each of the films has a high-gloss, cohesive inner surface and a matted, non-cohesive outer surface.

Abstract: To the housing part of a backflow-preventer for a sanitary device there is fastened an outer sleeve, made from elastomeric material, exhibiting a sleeve section which is distanced from the housing part. The outer sleeve embraces an inner sleeve which is fixedly supported to the housing and includes a supporting section, which is dimensioned such that the inner sleeve, when acted on by water flowing in the direction of flow, cannot fold inward. The sleeve section bears, under pretensioning, against the supporting section and is expanded by the pressure of the water so as to clear an opening between the sleeve section and the inner sleeve. If the water current is interrupted, the outer sleeve immediately bears again against the inner sleeve. The end sections of the inner and outer sleeves are configured like a sealing lip. The backflow-preventer prevents water from flowing back, even under the least underpressure on the feed side. Moreover, it is not sensitive to foreign bodies.