Abstract: One or more techniques and/or systems are disclosed for a flap valve in a diaphragm pump. The flap valve includes a body and a self-centering hinge portion. A front portion of the body includes a front surface having a raised portion and a recessed portion. The front surface is configured to form a seal with a surface of the pump when the body is in a closed position, the surface of the pump being at an inlet or an outlet of a pumping chamber. The body is configured to allow a downstream flow of a fluid when the flap valve is in an open position. The self-centering hinge portion is operably connected to the body. The self-centering hinge portion has a dynamically changing longitudinal axis. The body is configured to simultaneously translate and rotate about the dynamically changing longitudinal axis to form the seal.

Abstract: Cleanout conduit valve installations may include at least one cleanout housing having a cleanout housing interior and configured for placement in the cleanout conduit hole with the at least one cleanout conduit extending into the cleanout housing interior. A cleanout housing opening may overlie the cleanout housing interior. An openable cleanout housing door may be disposed in the cleanout housing opening. At least one cleanout conduit valve assembly may be configured to be disposed in fluid communication with the at least one cleanout conduit in the cleanout housing interior of the at least one cleanout housing. The at least one cleanout conduit valve assembly may include a valve housing configured for mounting on the at least one cleanout conduit. A valve mount may be carried by the valve housing. A valve may include a valve arm pivotally carried by the valve mount. A valve stop may extend from the valve arm. A valve body may be carried by the valve arm. The valve body may have a sealing surface.

Abstract: A downspout end cover protects and closes a lower end of a rain gutter downspout assembly. The cover includes a body that forms a continuous hollow channel with the top and the bottom for passage of collected rainwater. The back of the body forms a first aperture sized to attach to an end of the downspout and the front forms a second aperture that emits collected rainwater. A door is rotatably attached to the front of the body at a top of the front of the body by a hinge and when closed, prevents entry of animals, insects or blown debris. A ledge provided behind the door, so that the door, when closed, rests against the ledge and does not protrude from the body, protecting the door and sealing the downspout end cover against entry of insects and preventing detachment of the door from the body.

Abstract: Cleanout conduit valve assemblies for a cleanout conduit may include a vertically oriented valve housing. The valve housing may include a valve inlet end configured to be disposed in fluid communication with the cleanout conduit and a valve discharge end opposite to and generally above the valve inlet end. The valve discharge end may be oriented within a valve discharge plane disposed at a discharge angle of greater than 0 degrees with respect to a horizontal plane. The valve discharge end may have an upper discharge opening side and a lower discharge opening side sloped downwardly from the upper discharge opening side. A valve body may be pivotally carried by the valve housing at the upper discharge opening side of the valve discharge end. Methods of preventing precipitation and runoff on a ground surface from entering a cleanout conduit connected to a sewer service line are also disclosed.

Abstract: A bypass valve for an exhaust-gas turbocharger has a valve flap seat formed at one end of a bypass duct and a valve flap. The valve flap has, at the outer edge of the its closing surface, a flap skirt which, in the closed state of the bypass valve, extends from the closing surface predominantly in the direction of the valve seat axis beyond the valve flap seat and at least over a part of the valve flap outer circumference, such that the flap skirt at least partially surrounds the valve seat outer circumference of the valve flap seat and, in an overlap region, engages over the valve flap seat by the skirt height.

Abstract: This valve device includes a body having passages and valve shaft holes, a valve shaft passed through the valve shaft holes in a rotatable manner, and butterfly valves. The butterfly valves include first contour parts and second contour parts forming outer contour parts that are smaller than the first contour parts. The first and second contour parts are fixed to the valve shaft in order to close off the passages at positions set apart from the valve shaft holes toward the downstream side (upstream side) of the passages, and are disposed flanking a straight line parallel to the valve shaft to form prescribed outer contour parts. The body includes first seal parts with which the first contour parts are brought into contact and second seal parts with which the second contour parts are brought into contact within the passages. Fluid leakage in a closed state can thereby be reliably prevented.

Abstract: Single-door flap gates and double-door flap gates are disclosed. Flap gates of the inventive subject matter are coupled with a structural element by one or more linkages, where hinges that are coupled with the structural element allow flap gate doors to open when sufficient fluid build-up exists behind the doors to push the doors open. Hinges are mounted at an angle. Features to facilitate fluid drainage despite the flap gate doors being closed are also contemplated.

Abstract: An oilfield valve having a body defining a throughbore and configured for controlling flow through the throughbore, wherein the valve has a disc connected to the body and movable between an open position and a closed position, and further wherein the disc has a top surface and a bottom surface, and defines a perimeter, wherein the disc is composed of a composite material having a facesheet and a core material adhered to the facesheet.

Abstract: A backwater valve has a hollow valve body with an inlet defined by a vertical surface, an outlet, and a bottom. A pivoting valve member is pivotlly movable about a pivot axis between a normally open position along the bottom of the valve body and a closed, vertical position sealing the inlet. The valve member has a hinge and, the pivot axis being positioned at the hinge end. An overbalancing member carried by the valve member biases the float toward the closed position. The overbalancing member comprises at least one of a counterweight and a magnetic element. The overbalancing member is positioned at the hinge end and spaced from the pivot axis such that the overbalancing member is vertically above the piot axis when the valve member is in the open position and horizontally over from the pivot axis when the valve member is in the closed position.

Abstract: A check valve including a valve body and a flapper assembly, the valve body defining an inlet, an outlet, an interior cavity, and a port in the interior cavity; the flapper assembly movable between an open position, providing fluid communication between the inlet and outlet, and a closed position, isolating the inlet from the outlet, the flapper assembly including a resilient body and a spring assembly, the spring assembly configured to bias the flap portion of the resilient body towards the closed position, the spring assembly including a spring and a backing plate mounted on opposite surfaces of the resilient body and configured to increase the stiffness of the intermediate portion of the resilient body.

Abstract: A flow-limiting device comprises a stationary portion and a mobile valve comprising an orifice. The mobile valve is kept closed by a forced closure system that enables the mobile valve to limit the flow of a fluid passing through same and opens same to allow a larger flow to pass through when the upstream pressure of the fluid becomes higher than a predetermined value. The orifice of the flow-limiting device can be positioned at the bottom or the periphery of the mobile valve. The forced closing system can comprise at least one spring attached to the stationary portion at one end and to the mobile valve at the other end.

Abstract: A fuel tank plumbing structure includes a first pipe; a second pipe coaxially connected to the first pipe; a flexible locking piece having a protruding end displaced in a radial direction of one of the first pipe or the second pipe; a locking portion formed in another of the first pipe or the second pipe to engage the locking piece; and a lock member annularly formed and fitted externally onto the one of the first pipe or the second pipe, and including an escape groove portion and a control wall portion arranged adjacent to the escape groove. The lock member is displaced in an axis line direction of the one of the first pipe or the second pipe between a first position wherein the locking piece is displaced toward the escape groove portion, and a second position wherein the locking piece abuts against the control wall portion.

Abstract: A fuel system includes a fuel tank filler neck associated with a fuel tank. The fuel tank filler neck includes a fill tube for receiving a fuel-dispensing pump nozzle and a fuel conductor interconnecting an interior region of the fuel tank and a passageway formed in the fill tube.

Abstract: A flow-limiting device comprises a stationary portion and a mobile valve comprising an orifice. The mobile valve is kept closed by a forced closure system that enables the mobile valve to limit the flow of a fluid passing through same and opens same to allow a larger flow to pass through when the upstream pressure of the fluid becomes higher than a predetermined value. The orifice of the flow-limiting device can be positioned at the bottom or the periphery of the mobile valve. The forced closing system can comprise at least one spring attached to the stationary portion at one end and to the mobile valve at the other end.

Abstract: The present invention concerns a trickle valve assembly for supplying particulate material exiting the bottom of a separating cyclone, comprising a separating cyclone outlet conduit having a bottom end with an inclined valve seat and a pivotable valve plate assembly with a valve plate pivoting about a valve hinge and a counter-weight on the opposite side of said valve hinge, wherein the outlet conduit is provided with at least one gas inlet above the inclined valve seat which is in fluid communication with a supply of pressurised gas, such as a pressurised air supply.

Abstract: A gate assembly for use on a pipe, such as a culvert pipe. The assembly having an adjustable engagement band defining an opening. The opening having a nominal diameter sized to engage a culvert pipe. The diameter of the opening being adjustable by up to plus or minus 30 percent the nominal diameter.

Abstract: A non-return valve mechanism comprises a tubular member (1) having a substantially constant external diameter whereby the tubular member can be inserted into a pipe (5) from an open end thereof. A pivotable closure member (9) is provided at one end of the tubular member for closing the end of the tubular member, the closure member being adapted to be positioned externally of the pipe. At least one seal (3) extends around the external periphery of the tubular member for sealing with an internal surface of the pipe into which the tubular member is inserted.

Abstract: An intake pipe for intake gas of an internal combustion engine has an intake pipe channel and a flap unit with a flap shaft and a flap fixedly arranged on the flap shaft. The flap unit alternatingly opens or closes the intake pipe channel. A hollow insert body is disposed in the intake pipe channel, wherein the flap unit is arranged in the insert body and the flap is positioned in a hollow interior of the insert body. The insert body has opposite end faces and the opposite end faces are open. The flap shaft extends through opposite walls of the insert body in a radial direction relative to an insert body axis of the insert body. The insert body is rotatable on the flap shaft. A radial inner circumferential side of the insert body widens toward at least one of the open end faces.

Abstract: An exhaust gas apparatus of an internal combustion engine is capable of suppressing the sound pressure level from being increased by the air column resonance in the tail pipe. The exhaust gas apparatus being provided with an exhaust gas pipe at the downstream side of an internal combustion engine in the exhaust gas direction of an exhaust gas flow, the exhaust gas pipe having an upstream opening end at one end portion thereof and connected with a sound deadening device at the upstream side in the exhaust gas direction of the exhaust gas flow, and a downstream opening end at the other end portion thereof for exhausting the exhaust gas flow to the atmosphere.

Abstract: A method for closing a fuel tank includes providing a base sized to be received within an interior of a fuel tank filler neck, movably mounting a closure structure on the base, and securing a biasing mechanism to the base wherein the biasing mechanism biases the closure structure into a closed position on the base.

Abstract: With a device (1) for equalizing pressure surges in cases of possible dust or gas explosions in closed systems, such as silos, pipelines or the like, comprising a hinged cover (3) which can be pivoted on an outlet connection or a closing edge (2) and has a smooth outer surface (12) and comprising a deflecting plate (8) on the outlet connection or on the closing edge (2) for the cover (3) to strike against in the event of an explosion, it is intended to achieve not only cost-effective production but also in particular a significant weight saving of the hinged cover, quick changing of the cover in the case of damage, or quick fitting of the cover in the first instance, and an improvement in the protective effect of the system.

Abstract: A valve (10) is disclosed. The valve (10) has an inclined valve seat (14) defining a fluid aperture (18), and a valve head (20) for contact with the valve seat (14) for closure of the fluid aperture (18). A lever arm (22) is attached to the valve head (20). There are biasing means (32) operatively coupled to the lever (22) arm for urging the valve head (20) into contact with the valve seat (14), the biasing means (32) being arranged to provide decreased biasing on opening of the valve head (20) relative to the fluid aperture (18).

Abstract: A transport and storage container for fluids having a check valve that allows the contents of the storage container to be substantially completely emptied. A valve housing of the check valve has a valve face against which a valve flap rests against in its closed state.

Abstract: A check valve for deterring intrusion into drain pipes comprises a body member having at least a first orifice and configured to mount on a drain pipe wherein the drain pipe is adapted to promote fluid flow in a single direction. Pivotably mounted on said body member will be a valve member. The mounting arrangement will provide a closed position that substantially occludes the first orifice and a range of open positions when the valve member is pivoted to open in the flow direction. In addition, at least one additional orifice is provided in either the body member or the valve member to permit fluid flow irrespective of the position of the valve member.

Abstract: A non-return valve unit for insertion into a substantially horizontal waste water pipe comprises a horizontal tubular portion (10), and a flange (11) surrounding one end of the tubular portion and angled obliquely to the vertical such that the outer face of the flange, relative to the tubular portion, is directed upwardly. The flange mounts on the upper part of the outer face thereof a pivot (12) carrying a closure member (13) engageable with the outer face to close the tubular portion.

Abstract: A method and apparatus for drying and reducing the particle size of malleable material. Preferred embodiments of the invention include a drying apparatus for use with a malleable material, comprising a blower, an airlock feeder, a main line which contains an accelerator, a conditioning chamber, and a dehydration chamber, a polishing line which contains an accelerator, a conditioning chamber, and a dehydration chamber, and a squid line blower for providing pressurized heated air to the apparatus. An alternative preferred embodiment of the invention comprises a method of drying and size reducing malleable material.

Abstract: A flapper base provides a flapper base body with a hinge portion unitarily formed thereupon and a flapper seat surface formed within the flowbore of the body. The flapper base may be formed from a single section of tubular metallic stock. In a method of forming a base, the stock is gripped by a rotary clamp, and a five-axis milling machine is used to cut away portions of the stock section and to form the seat surface.

Abstract: A safety valve assembly comprises a valve body, a flapper mount, flapper and a hinge used to rotate the flapper in an opened or closed position. Torsional pins are mounted adjacent the flapper mount, each having ends which extend into the hinge and terminating adjacent each other at a location along the hinge. Torsional springs are circumferentially mounted around the torsional pins. Tabs extend from the torsional springs and contact an actuation member extending over the top of the flapper. As such, the torque created by the torsional springs is transferred to the actuation member via the tabs, thereby reducing the stress on the torsional springs.

Abstract: A backflow preventing apparatus for a scroll compressor is disclosed, in which a check valve is hinge-coupled to a valve seat, or is coupled to a valve seat so as to be elastically opened and closed. The check valve is opened and closed by a pressure difference and its own weight or elasticity, thereby having a quick response speed. The check valve prevents discharged refrigerant from backflowing, thus enhancing efficiency of the compressor. Further, since the check valve when opened is prevented from colliding with a valve housing by a valve stopping surface or a retainer, discharge noise from the compressor is reduced.

Abstract: A valve assembly disposed in a nozzle of a fuel-dispensing pump that, when in an open, operative position, freely allows fuel to flow therethrough. In a closed position, fuel is prevented from dripping from the end of the fuel-dispensing nozzle. A first embodiment provides a spherical or flat, spring-loaded one-way sealing element or check valve that is forced away from the dispensing end of the nozzle to allow fuel to flow therefrom. When fuel dispensing is complete, the check valve seals the nozzle. In a second embodiment, apertures in a cap are rotated between an open and a closed orientation to allow or block fuel passage depending upon their angular position. The valve assembly is press fitted into a conventional fuel-dispensing nozzle.

Abstract: A fuel check valve that includes: a pipe having a fuel outflow port; a valve element attached in an openable and closable manner to the fuel outflow port of the pipe, the valve element being normally urged by a spring in a closing direction; a support shaft disposed on one of the pipe and the valve element while a basal end portion thereof is fixed and a tip end portion thereof is made free, the support shaft functioning as a swing fulcrum for the valve element; and a bearing portion disposed on another one of the pipe and the valve element to swingably support the support shaft, the bearing portion including: a receiving hole into which the tip end portion of the support shaft is inserted; and an engaging groove with which a basal portion side of the support shaft is engaged.

Abstract: A flapper valve for push-in snap-lock attachment to a spud to be welded to a fuel tank and attached to a flexible filler tube hose. The flapper has an annular flexible seal overmolded thereon, preferably of elastomeric material. The flapper has a pair of trunnions, one of which has an extension or spindle with a resilient member received thereover with one end of the resilient member slidably anchored to a post on the flapper to form a flapper subassembly. The opposite end of the resilient member is deflected to fit in a slot or groove in the body when the trunnions are snapped into a slot formed by at least one deflectable portion formed integrally on the exterior of the tubular valve body for pivoting the flapper. Deflector vanes are provided on the upstream side of the flapper to protect the seal from the end of a siphon hose.

Abstract: An exhaust gas control valve includes a valve seat, a valve plate having a first exhaust gas pressure receiving area corresponding to an opening area and a second exhaust gas pressure receiving area larger than the first area; and a spring for closing the valve. In a closed state, gas pressure during a low engine speed operation acts on only the first exhaust area for shutting the opening. In an intermediate state, the pressure during a the middle engine speed operation acts on the first and second areas for opening the opening but closing the valve by overlap of wall portions of the valve plate and the valve seat overlap. In an opening state, the pressure during a high engine speed operation acts on the first and second areas for forming a gap between the wall portions to pass the gas therethrough.

Abstract: A flange valve to deter entry of rodents and pests, insertable on existing devices, comprising a unidirectional swinging door attached on an inner wall of a frame, the door and the inner wall of the frame having a clearance between them of a dimension not allowing entry of rodents and pests. The design of the frame is catered to the desire of the user and may be a laterally protruding ring having a central circular opening and openings along the edges for the insertion of bolts or screws; a laterally protruding ring on one peripheral edge of an open cylindrical body; a cap having a flat top with a central circular opening and openings for the insertion of bolts and screws; a conduit; or a wax free toilet bowl gasket, a toilet flange or a wax ring used in the installation of toilet bowls.

Abstract: A fuel-transfer system is provided for a fuel system of a vehicle. The fuel-transfer system includes a filler neck and a fuel tank having top and bottom walls. The fuel-transfer system includes a tube and a fuel conductor. The fuel conductor includes a housing and a diverter valve positioned to lie in the housing. The diverter valve is configured to intercept and guide the tube through an outlet of the housing into a fuel tank.

Abstract: A flapper valve for push-in snap-lock attachment to a spud to be welded to a fuel tank and attached to a flexible filler tube hose. The flapper has an annular flexible seal overmolded thereon, preferably of elastomeric material. The flapper has a pair of trunnions, one of which has an extension or spindle with a torsion spring received thereover with one end of the torsion spring slidably anchored to a post on the flapper to form a flapper subassembly. The opposite end of the torsion spring is deflected to fit in a slot or groove in the body when the trunnions are snapped into slots formed by deflectable fingers formed integrally on the exterior of the tubular valve body for pivoting the flapper. Deflector vanes are provided on the upstream side of the flapper to protect the seal from the end of a siphon hose.

Abstract: A safety relief valve is provided for use in association with a liquid storage tank. The safety relief valve generally includes a valve base, a valve seal plate, a hinge mechanism and a lever mechanism. The valve seal plate is pivotally coupled to the valve base by the hinge mechanism which is adapted to allow pivotal movement of the valve seal plate between a closed position and an open position. The lever mechanism is pivotally coupled to the valve base and is adapted to control the pivotal movement of the valve seal plate. In one embodiment, the hinge mechanism includes an adjustment device adapted to adjust the valve opening set point. In another embodiment, the lever mechanism includes a rod pivotally coupled to the valve base and a guide rotatably coupled to the valve seal plate, with the rod being displaceable through the guide during pivotal displacement of the valve seal plate.

Abstract: A one-way fluid valve member (10) to be mounted on a valve (12) body having a valve opening (18) surrounded by a valve seat (16). The valve member (10) includes,: a valve closure part (14) to be movably mounted on the body (12) for movement relative thereto between a first position engaging the seat (16) to prevent movement of fluid through the opening (18) in a predetermined direction, and a second position spaced from the seat (16) to allow fluid to pass through the opening (18) in a direction opposite the predetermined direction; and wherein the valve closure part (14) has a convex surface to engage the seat (16) so as to project into the opening (18).

Abstract: A gas tight shut-off valve for a material charging or discharging lock includes a valve closing element that is movable relative to a valve a seat, between a first position which the valve closing element and the annular valve seat can be axially pressed together, and a second position in which the valve closing element is located laterally of the discharge opening in the valve seat. A soft sealing element is associated either with the annular valve seat or with the valve closing element. The valve further includes a heat protecting element which is movable between a first position in which it covers the soft sealing element when the valve closing element is in its second position, and a second position in which it uncovers the soft sealing element.

Abstract: A support member 10 having a tubular portion 11 is joined at an end portion of a muffler pipe 1. The support member 10 forms a flange 12 as a valve seat and a support bracket 14. The support bracket 14 has a valve disk 20 supported rotatably via a hinge axis 15. The valve disk 20 has an outer peripheral portion 12 as a contact surface with the valve seat, and a weight 30 is welded to a bead portion 23 with an inner portion thereof projecting to the back face. A spring is wound around the hinge axis, with one end 18 engaging a back face of the valve wall 21 for the valve disk, the other end engaging a support bracket. The resonance frequency is decreased by the weight, thereby preventing the beat sound from arising in a normal range of the engine speed. The weight is welded to the bead portion, thereby not causing the outer peripheral portion 23 as the contact surface to be distorted.

Abstract: A valve seat structure is secured to an outlet end of a passing pipe installed in an exhaust muffler. The valve seat structure includes a flat seat surface portion which extends around the outlet end of the passing pipe. A valve plate structure is pivotally connected to the valve seat structure. The valve plate structure includes a valve plate portion and a flat sealing portion which forms a peripheral part of the valve plate portion. The valve plate structure has a close position wherein the valve plate portion closes the outlet end of the passing pipe having the flat sealing portion entirely pressed against the flat seat surface of the valve seat structure and an open position wherein the valve plate portion opens the outlet end of the passing pipe having the flat sealing portion separated from the flat seat surface. A biasing structure biases the valve plate structure to assume the close position.

Abstract: A valve for a control muffler includes: a valve element which is swingably journaled on a support shaft 5 supported by shaft holes 41a of a pair of first shaft supporting portions 41 inside the support shaft 5; bushes 6 which are respectively interposed between the support shaft 5 and a pair of second shaft supporting portions 33 that are disposed on the valve element to pivotally support the support shaft 5; and a coil spring which urges the valve element in a valve closing direction. In the valve, a welding rising portion 41b which protrudes in the axial direction is disposed on an outer opening edge of the shaft hole 41a of each of the pair of first shaft supporting portions 41, and the support shaft 5 is welded to tip ends of the welding rising portion 41b.

Abstract: An exhaust valve assembly for controlling the flow of exhaust comprising a hollow elongated member, desirably in the form of an exhaust pipe or component thereof, having an open end, a flap associated with the open end and a spring having two ends. The flap is pivotable between a first position to close the open end and a second position to open the open end, and is adapted to pivot toward the second position when the exhaust gas within the elongated member achieves a predetermined pressure. One end of the spring is associated with the flap and the other end of the spring is associated with the elongated member along the length of the elongated member. The spring biases the flap toward the first position. The spring desirably extends generally parallel to a longitudinal axis of the elongated member when the flap is in the first position. The flap desirably includes a lateral edge having a hook and the one end of the spring is mounted to the hook.

Abstract: An exhaust valve assembly for controlling the flow of exhaust comprising a hollow elongated member, desirably in the form of an exhaust pipe or component thereof, having an open end, a flap associated with the open end and a spring having two ends. The flap is pivotable between a first position to close the open end and a second position to open the open end, and is adapted to pivot toward the second position when the exhaust gas within the elongated member achieves a predetermined pressure. One end of the spring is associated with the flap and the other end of the spring is associated with the elongated member along the length of the elongated member. The spring biases the flap toward the first position. The spring desirably extends generally parallel to a longitudinal axis of the elongated member when the flap is in the first position. The flap desirably includes a lateral edge having a hook and the one end of the spring is mounted to the hook.

Abstract: A system for covering drain pipe outlets, particularly, as they exit a building. The system includes a band that is tightened around the exterior of a pipe as it protrudes through the side of a building. Attached to the band is a hinged cover which is sized to entirely cover the pipe and hidden hinge. The cover may be covered with material to match or complement the building exterior surfacing, such as paint or stucco. In addition, the band portion may also include one or more restictors, such as bars, to prevent unauthorized access or debris from entering the pipe. The system provides for multiple size covers and bands for a wide variety of pipe sizes.

Abstract: A valve seat structure is secured to an outlet end of a passing pipe installed in an exhaust muffler. The valve seat structure includes a flat seat surface portion which extends around the outlet end of the passing pipe. A valve plate structure is pivotally connected to the valve seat structure. The valve plate structure includes a valve plate portion and a flat sealing portion which forms a peripheral part of the valve plate portion. The valve plate structure has a close position wherein the valve plate portion closes the outlet end of the passing pipe having the flat sealing portion entirely pressed against the flat seat surface of the valve seat structure and an open position wherein the valve plate portion opens the outlet end of the passing pipe having the flat sealing portion separated from the flat seat surface. A biasing structure biases the valve plate structure to assume the close position.

Abstract: A scroll compressor has a check valve plate assembly with a reinforcing device to increase the strength of the check valve plate. The check valve plate is stamped from a relatively thin steel reed material. Notched areas are provided during stamping to enable the formation of rolled laterally spaced pins which provide an axis along which the check valve plate may pivot. The reinforcing device is in the form of a slot rolled pin, a spiral rolled pin, or a solid pin, fitted within a bore formed by the rolled laterally spaced pins of the check valve plate. The notched areas of the check valve plate are weakened due to the reduction of the local cross sectional area of the laterally spaced pins. Insertion of the reinforcing device significantly reduces the incidence of cracking that occurs at the notched areas of the check valve plate.

Abstract: A back flow preventing valve is formed of a valve main body and a valve member. The valve main body includes a fluid inlet at one side, a fluid outlet at the other side having a valve seat at an end surface thereof, a flange extending outwardly from an outer periphery thereof and located between the fluid inlet and outlet, and a bent portion situated inside the valve main body near the fluid outlet for changing a flowing direction of a fluid flowing through the valve main body. The area of the fluid outlet is greater than that of the fluid inlet. The valve member is pivotally connected to the valve main body and urged toward the valve seat. The valve member is opened when a fluid entering from the fluid inlet is ejected from the fluid outlet, and closed when the fluid does not flow from the fluid inlet to the fluid outlet.

Abstract: A one-piece check valve is provided for a fuel filler pipe connected to a vehicle fuel tank to provide a fuel filling passage communicated to the fuel tank. The check valve comprises a thin sheet of material shaped to comprise a mounting portion, a flapper valve and an intermediate connecting portion that connects the flapper valve and the mounting portion with the connecting portion being contoured so as to normally impart a spring bias to the flapper valve to close off the fuel filling passage. An elastomeric seal is fastened on the flapper valve or on the fill pipe in a manner to provide a liquid fuel and vapor tight seal when the flapper valve is in a closed position relative to the fuel filling passage. The flapper valve is opened when fuel is introduced into the fuel filler pipe to permit fueling of said tank.