Abstract: A valve has a valve body having a passage including a hole in which gas flows, a valve seat surrounding a port of the hole. A valve disc is provided for closing the port of the hole, and an actuator is provided for operating the valve disc in a sine curve motion. The valve includes an inside heater for heating the valve disc.

Abstract: A valve comprises a valve body including a valve cavity with an inlet and an outlet. The valve body has a valve seat in the valve cavity. The valve seat has a flow passage disposed between the inlet and the outlet. A valve stem is movable in the valve cavity between an open position and a closed position. The valve stem includes a substantially rigid shaft and a resilient shell. The resilient shell is generally tubular, and is injection molded around a portion of the shaft. The resilient shell includes a sealing surface which is spaced from the valve seat with the valve stem in the open position and which is pressed against the valve seat to block the flow passage between the inlet and the outlet with the valve stem in the closed position. The resilient shell includes a spring cavity. A resilient spring hat has a spring seat. The resilient spring hat is disposed in the valve cavity with a press fit against an inner surface of the valve cavity to seal the valve cavity against leakage.

Abstract: A valve element with a disk-shaped leaf spring carrying a movable core in a solenoid valve to open/close a valve seat. The leaf spring includes an outer peripheral ring section, a hub section having a central hole and a plurality of radially arranged arm sections connected between the ring; section and hub section. A seal of elastic material extends along the outer peripheral, ring section of the leaf spring. The movable core has a cylindrical section and an end wall section having a through central hole. The cylindrical section has a stepped section on its outer periphery adapted to be held in contact with the leaf spring. A valve seal is formed on the end wall section through vulcanization and molding, and has a main body section on the outer surface of the end wall section, a small diameter section in said through hole and a holder section connected to the main body section by the small diameter section and inner surface of the end wall section.

Abstract: A valve element comprising a leaf spring carrying a moveable core to open and close a valve seat in a solenoid valve. The leaf spring includes an outer peripheral ring section, a hub section with a central hole, connection holes, and a plurality of radial arm sections. An outer peripheral seal is arranged along the outer peripheral ring section. A valve disk is fitted to the hub section with a valve seal to contact the valve seat. A movable core with a flange section is on the outer surface of the hub section. A holder ring is connected to the valve disk through the connection holes which secures the movable core to the leaf spring.

Abstract: Filling valve for dispensing metered quantities of a flow of medium, comprising: a valve housing with a flow passage which has an inlet and an outlet opening; an actuable valve body which is accommodated in the flow passage, for opening and closing the outlet opening; actuating means for moving the valve body to and fro between an open position and a closed position; in which the valve body comprises a transitional part having a substantially circular cross section, which transitional part transits into a pointed end part, the transitional part and the pointed end part merging smoothly into one another via a convexly curved part running into an adjoining concavely curved part.

Abstract: A plunger-style valve assembly for use in a launder system of a machine for casting parts made from molten aluminum or other metal comprises a valve body having a longitudinally-extending inlet passageway and a longitudinally-extending outlet passageway which communicate with one another through a valve port centered about a vertical axis. A raised circular valve seat defines the valve port, and a vertically-movable valve element is aligned with the valve port and the valve seat. The valve element has a resilient, heat-resistant sealing member secured to the lower end thereof. The valve element can be raised or lowered so that the resilient sealing member moves into and out of engagement with the raised valve seat, thereby controlling the flow of molten aluminum from the valve body inlet passageway to the valve body outlet passageway through the valve port.

Abstract: A valve body includes: a main body having a recess formed in a surface thereof facing a valve seat. A sealing member fills the recess of the main body. The sealing member is made of annealed nickel. The annealed nickel has a low hardness, so that the sealing member is slightly depressed by abutment thereof against the valve seat. The sealing member is then hardened by further application of stresses. Therefore, complete sealing between the sealing member and the valve seat can be achieved.

Abstract: A valve arrangement includes a valve housing and a closing element movably arranged within the housing. The housing has a cylindrical bore a lateral inlet opening, an axial outlet opening, and a valve seat arranged axially at a distance away from the inlet opening. The closing element includes a sealing section adapted to seat against a valve seat so as to block fluid flow through the outlet, and tapered portion which defines a rotationally symmetrical circumferential distribution space between itself and the bore.

Abstract: A vacuum processing system may have a two-piece slit valve door, including a seal plate mounted on a mounting member, for closing the slit valve in a vacuum chamber. The seal plate, the piece that actually contacts the slit valve, may have a molded-in-place seal for making the contact and preventing metal-to-metal contact between the door and the valve. The seal may have a parabolic profile and be adhesively bonded within a groove in order to enhance its compressive and sealing capabilities. The seal plate may be removable for ease of service or replacement. Any particles generated by metal-to-metal contact between the seal plate and its mounting member may be captured by an O-ring statically sealed around the periphery between the two pieces.

Abstract: A valve gasket includes a main body portion formed of an elastomeric material having a high hardness durometer. The main body portion has recesses located on its opposite sides and at least one opening through the body connecting the recesses. The opposed recesses and the opening are filled with an elastomeric material having a hardness of a lesser durometer, softer than that of the main body portion. At least one of the filled recesses forms a sealing surface of the gasket. In a preferred embodiment both filled recesses form sealing surfaces, one to the seat and one to the stem. In one embodiment the gasket is generally ring-shaped in configuration and the opposed recesses are on opposite sides of the ring and each circumscribe the circumference of the ring.

Abstract: A copper alloy plumbing fixture containing interdispersed lead particles coated non-continuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, selectively and non-continuously coating the lead dispersoid particles on the water contact surface with bismuth, tin or copper.

Abstract: A valve seal system for passageway through a valve body emerging through a first generally flat and rigid surface, having a valve member including a resilient seal with generally flat exposed surface adapted to be brought into contact with the generally flat rigid surface, and having a generally circular, raised resilient ring portion extending from the generally flat exposed surface, the raised resilient ring portion adapted to be compressed against the generally flat rigid surface to seal the resilient seals against the generally flat rigid surface when said valve member is moved to a closed position by virtue of the raised resilient ring portion being compressed against the generally flat rigid surface.

Abstract: In an air duct selector, a supporting member has a grid shape, and is formed with four penetration holes. Since a film member is affixed to two fitting portions which are arranged on two ends of the supporting member, the film member is fixed on the supporting member. The supporting member and the film member are arranged in a duct to move in a vertical direction. When air flow is blown against the inside surface of the film member through the penetration holes 24a.about.24d, the film member is bent to swell against the film member, and presses against a peripheral portion of a cool air bypass opening portion to entirely cover the cool air bypass opening portion.

Abstract: A quick-coupling fitting for pipes comprises a female element and a male element that can be coupled together. The female element comprises parts that are fixed and parts that can slide between a closed position and an open position of a passage for fluids. The fixed parts comprise a stem having one end enlarged, and the slidable parts comprise a bush, coaxial with the stem, axially slidable and elastically urged towards the closed position. The bush defines with the stem a hollow space for the passage of the fluid. The bush is provided with a sharp-edged metal annular projection that, in the closed position, engages with a metal frustum-shaped surface of the enlarged end of the stem to provide a seal of said hollow space.

Abstract: The invention concerns a tap fitting in which the gap between the tap spindle and the spindle lead-in in the housing is sealed off by means of a bellows-type seal. The end of the seal nearest the housing is connected to a sleeve which is sealingly mounted in the housing.

Abstract: In a valve, in particular an expansion valve for refrigeration systems, at least the housing (2) and all nozzles (3, 4, 5) are deep-drawn parts of stainless steel having a carbon content of less than 0.05%. These parts are joined to one another by soldering. The steel has such a low content of carbon that despite being subjected to the effects of heat during soldering, it is practically insensitive to intercrystalline corrosion. This produces a visually attractive valve that is not harmful to the environment.

Abstract: A pressure regulator for the first reduction stage of a two-stage aqualung. The regulator includes an inlet passage connected to a supply of breathable gases at high pressure; an outlet passage for the gases leading to a second stage regulator; a valve between the inlet passage and the outlet passage; the valve including a valve seat provided with central a through passage and a guided shutoff element; a flexing chamber communicating by one end with the surronding environment and closed at the other end by an impermeable and elastically deformable diaphragm; a rod-like member in contact by one end with the diaphragm and extending with clearance by its other end through the central passage of the valve seat up to the shutoff element. The valve means comprising a planar valve seat, and a shutoff element the portion of which, cooperating with the valve seat, is hemispherical sectioned.

Abstract: A copper alloy plumbing fixture containing interdispersed lead particles coated noncontinuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, selectively and noncontinuously coating the lead dispersoid particles on the water contact surface with bismuth. Tin may be substituted for bismuth to obtain similar results.

Abstract: A method for manufacturing an improved air damper for a motor vehicle temperature control unit includes a first machining process for injection-molding a sealing section to be formed into a hollow shape. One end of the sealing section is simultaneously injected onto a lower surface of a base member. In a second machining process, the other end of the sealing section is slip-fitted onto the upper surface of the base member and mechanically affixed thereto. To this end, the sealing section preferably has openings which may be positioned over corresponding fixing pins extending from the upper surface of the base member. The fixing pins may then be folded down, for example, by heat welding to lock the fixing pins over the sealing section and thereby form a hollow member. The sealing section further includes a sealing lug for abutting a housing portion of the temperature control unit, such as an interior wall of an air duct.

Abstract: A blade for an isolator, in particular for a diverter or flap isolator, which comprises a plurality of plate arms (21) to be attached to an isolator shaft (31), and a pair of plates (22), preferably comprising an array of panels, attached to the plate arms (21) and separated by a gas space (23). The plates (22) are suitably provided with insulation (27) retained by cladding (28). The blade plates (22) will usually be provided with convolutions (24) to give them improved stiffness, and the blade plates will furthermore be welded or otherwise secured together by fastening means such as a series of short tubes (25) extending therebetween.

Abstract: A fire shutter comprises a plurality of substantially planar fire plate elements each having first and second opposite edges and supported so that they are adjacent to each other and turnable about respective parallel axes from a flow-through open position, in which gas-flow passages are formed between the plate elements, to a closed position, in which the first edge of one plate element of each pair of adjacent plate elements is close to the second edge of the other plate element of the pair and the fire plate elements together form a closed barrier.

Abstract: A self-sealing coupling comprising two coupling parts each having an obturating member which seals automatically when the coupling parts are disconnected, and a ring seal which mates in a fluid tight manner with the corresponding ring seal of the other coupling part when the coupling is engaged. One of the obturating members has a conical elastomeric face seal which is relaxed when the coupling is made and the two obturating members are displaced to one side of the mating ring seals for fluid flow. A tapering annular clearance is formed between the faces of the obturating members when the elastomeric face seal is in a natural relaxed state. The arrangement is such that the conical face seal is flattened by the thrust that reseats the two obturating members so that the tapering annular clearance between it and the flat face of the other obturating member is taken up and fluid between the obturating members is squeezed out to a location upstream of the ring seals.

Abstract: A unitized, rubber coated valve body for a dry barrel fire hydrant. The valve body is formed to have a hollow, tapered, substantially spherical, cast iron member having a hollow center, a threaded, upwardly facing hole for attachment to a control shaft or stem, a downwardly facing projection, and a rubber coating. The unitized body eliminates labor of assembly during service and maintenance operations. The rubber coating both provides a resilient valve face for effective sealing, and protects metal parts of the valve from corrosion arising from contact with water. The tapered body both distributes force evenly to the rubber valve face in the manner of a prior art metal disc, and enables water to flow therearound with minimized resistance, thereby maintaining head pressure at acceptable levels. The novel valve body satisfies both objectives while minimizing weight and requiring minimal material for fabrication. The body is formed with integral ears for slidably obstructing drain holes.

Abstract: A solenoid valve used in a brake fluid circuit of an anti-lock braking system of an automotive vehicle. The solenoid valve comprises a plunger which is axially movable upon energizing and de-energizing of an armature core located inside a solenoid coil. The plunger is formed of a sintered metal and formed at its tip end with a fitting groove. A spherical metal valve member is fixedly fitted in the fitting groove by caulking an outer peripheral wall surrounding the fitting groove. The valve member is brought into contact with a valve seat member formed with an oil passage through which oil is flowable, upon movement of the plunger toward the valve seat member.

Abstract: A fluid connection includes a valve which blocks flow into or out of the housing until a tube is fully received within the housing. The valve preferably has structure which is biased against the valve seat in the housing until the tube is moved into the housing. The valve seat is preferably in a plane which is perpendicular to the central axis of the housing. Further, the valve preferably has surfaces which guide fluid between the radially outer surface of the valve and the interior of the tube. In one embodiment, the valve includes a forward ring which contacts a tube and which has two ribs connected to the main valve body. The valve surface is preferably a conical surface spaced axially inwardly from the forward ring. Preferably, additional conical surfaces are disposed between the ribs and guide the fluid between the valve surface and the interior of the tube. In another embodiment, the valve may have an X or Y-shaped cross-sectional ribs which contact the tube.

Abstract: A valve assembly is disclosed having a valve body with dual valve seats and movable valve member located in the valve body having dual sealing surfaces to bear against the two value seats. One of the valve seats has a sharp-edged configuration which is contacted by a generally frusto-conical sealing surface on a movable primary valve member to crush or break any foreign material in the fluid flow stream. The conical sealing surface and the sharp-edged valve seat also act as a seal to block the fluid flow passageway. A secondary valve member is attached to the primary valve member and has a second sealing surface configured to engage the second valve seat of the valve body. The second valve seat and the second sealing surface may be annular and each have a partially, spherical, cross-sectional configuration. The secondary valve member is connected to the primary valve member such that they may move relatively to each other along their axis of movement.

Abstract: An improved valve of the flapper plate type is disclosed, the valve comprising at least one flexible member for connecting the flapper plate and the arm actuating the flapper. The flexible member absorbs impact energy and allows restricted three dimensional movement of the flapper plate. The seals for the flapper plate and the seat comprise electrically conductive sealing materials.

Abstract: A non-refillable valve for a pressure container which includes a housing with a central passageway, which has a lower portion that is narrower than its middle portion which in turn is narrower than its upper portion. A side port is present in the lower region of the middle portion and an outlet nozzle is attached to the side port. The lower end of the housing is adapted to sealingly engage the pressure to provide communication therebetween. The valve stem is rotatably positioned in the upper portion of the central passageway. The internal end of the valve stem extends into the middle portion of the central passageway and has a longitudinal central bore present part way through the body portion. A resilient valve sealing member has a body portion and an upper flange that extends upwardly and outwardly from the body. A vertical post is positioned in the middle of the top surface of the upper flange and slidingly and rotatably engages the central bore on the bottom of the valve stem.

Abstract: A fluid connection includes a valve which blocks flow into or out of the housing until a tube is fully received within the housing. The valve preferably has structure which is biased against the valve seat in the housing until the tube is moved into the housing. The valve seat is preferably in a plane which is perpendicular to the central axis of the housing. Further, the valve preferably has surfaces which guide fluid between the radially outer surface of the valve and the interior of the tube. In one embodiment, the valve includes a forward ring which contacts a tube and which has two ribs connected to the main valve body. The valve surface is preferably a conical surface spaced axially inwardly from the forward ring. Preferably, additional conical surfaces are disposed between the ribs and guide the fluid between the valve surface and the interior of the tube. In another embodiment, the valve may have an X or Y-shaped cross-sectional ribs which contact the tube.

Abstract: A stop valve assembly comprises two closure members one for stopping substantive gas or liquid flow and the other to prevent leakage along a spindle section 33. Each member possesses a closure element in the form of a rigid disc-like member (9 or 34) of accurately predetermined thickness lying in a recess (1 or 3) formed round the end opening of a duct or around the spindle section and having exactly the same depth as the thickness of the disc. Over the disc outer surface 11, and the end face around the recess is located a flat annular deformable seal member (14, 64); this can be secured at in relation to the disc member, so as to travel with the disc member 9 as a stop valve, or can be secured against the said face around the recess so as to define an antileakage spindle seal. Since no deformed seal is used and since no packing is used in the screw spindle mechanism, high actuating force is unnecessary.

Abstract: A ball valve includes a hollow ball provided with beehive-shaped reinforcing portion in the hollow ball for enhancing a strength of the hollow ball durable of compression, impact or any external force acting upon the ball for increasing a diameter of the ball but decreasing its weight, thereby being beneficial for making ball valves with larger sizes.

Abstract: A metal valve stem is attached to a ceramic valve plug. An elongated metal screw member has an expandable section securely wedged into a cavity in the plug as the attached screw/ceramic plug are threadably tightened on the valve stem. A first pre-wedging step presses an expander on the screw to fully bend the expander inside the ceramic cavity. The second wedging step during tightening of the screw/plug on the stem ensures uniform loading of the expander on the ceramic cavity surfaces.

Abstract: A fluid flow control valve is provided with a seal comprising a thin metallic film backed by a resiliently deformable body. The seal is mounted on a closure part which may be either the valve stem or the valve seat. The thin film and deformable body are deformed so as to conform to the surface the metallic film seals against as the valve is closed. As the valve is opened, the deformable body returns to its initial state thus returning the thin film to its initial state.

Abstract: Solenoid valve employing a loosely mounted rubber insert in a confining recess of the plunger for sealing an inlet port during closed condition of the valve. In case of adherence at the sealing surface of the inlet port with the rubber insert, initial acceleration of the plunger establishes an inertia impact to effectively break the bond, even at extremely low temperature.

Abstract: This invention relates to a shutoff mechanism, in particular in the form of a hinged safety-valve for large gas ducts, which contains a plate-shaped shutoff body which can be pressed against a seat on the housing. To guarantee a reliable and secure shutoff of large gas lines, the shutoff mechanism, together with an additional cover, forms a gas-tight chamber closed off from the two chambers of the gas line. The pressure in this chamber is monitored and is different from the pressures in the two chambers of the gas line.

Abstract: An isolator including a combined blade and flap arm assembly in which two opposed side members (22) of a blade frame (31) are extended (22a) to attach to an operating shaft (21) to act as the load-bearing members of the system, the frame being completed by two opposed side members (23) oriented parallel to the shaft. Preferably insulation (37) is provided on one side only of a blade plate (33) attached in a flexible manner to a cross-sectionally generally channel-shaped blade frame by being either welded or bolted to at least one strip (34 or 34a, 34b, or 41, 42) welded to the frame. The blade designed in accordance with the present invention will accept differential expansion due to operational conditions while retaining the lightest possible construction.

Abstract: Friction patches 7 are fixed on the metal core 1 of a shutter of a disc valve. The core comprises at least one seating 3 intended to accommodate a friction patch 7 provided with deformable fingers 8 which permit its accurate positioning on the core and its mechanical attachment on the disc via an injection elastomer 2.

Abstract: Grooves 6 having a length larger than the diameter of shaft 2 are formed in both surfaces of throttle valve 3 between mounting screws 4 and the inner circumferential wall of throttle body 1, perpendicular to the shaft axis, to capture any excess adhesive applied to the screws and migrating outwardly therefrom.

Abstract: A backflow-preventing valve for use in a screw head of a screw injection-molding machine which has an annular shape and comprises a ceramic member is disclosed and a metallic member. At least a surface portion of a backflow-preventing valve which is brought into contact with a material to be injected and a screw groove or a valve seat is constituted by a ceramic material.

Abstract: A pipe coupling comprising a cylindrical body having a fluid passage and a valve for opening and closing the fluid passage, in which the valve has a head portion and a cylinder portion, both made of chemicals-resistant polymers, and the cylinder portion has a plurality of holes penetrating the cylinder wall in the diametrical directions, the holes being formed alternately in the positions shifted in the circumferential direction and the axial direction of the cylinder portion, resulting in that the cylinder portion has elasticity in the axial direction.

Abstract: In a disc-type stop valve, a valve disc located at the lower end of a rotatable valve stem takes the form of a solid cylindrical metal member having an annular groove formed around the periphery of its lower surface in which an annular resiliently deformable plastic seal ring is disposed. The seal ring is held in place by a smaller-diameter circular metal retainer plate which is secured by bolts against the lower surface of the valve disc and against the underside of seal ring. When the valve is closed, a circumferential lower edge of the seal ring bears against a conically-shaped annular metal valve seat surface in the valve body. A large-diameter resilient compressible conventional O-ring is disposed in an annular space defined by the rear side of the retainer plate, the annular inner edge of the seal ring and a chamfered edge along the intersection of the lower surface and the side edge of the valve disc.

Abstract: A seal, especially for a valve, comprises a substantially rigid support member 10, an abutment envelope 22 made from polytetrafluoroethylene (PTFE) defining a volume between it and the support member, and a resiliently deformable, compressed, rubber sealing member 18 positioned in the volume.The PTFE envelope 22 is relatively chemically inert and allows the seal to be used in chemically harsh environments, the rubber sealing member 18 provides the necessary resilience and the rigid support member produces positive sealing.In a preferred embodiment, the sealing member 18, the abutment envelope 22 and the support member 10 are annular.

Abstract: A valve stroke adjustment locking mechanism comprising a valve seat having an axially extending bore therethrough and a seating surface. A valve operator is provided having an elongated member which is extended through the axial bore and is reciprocatable between a first open position and a second closed position. The elongated member includes a threaded end portion which extends from the valve seat for accommodating a valve assembly which is provided with a top portion forming a sealing face and a bottom portion having a central opening adapted to receive the threaded end portion of the elongated member. A closed end nut threadingly engages the threaded end portion of the elongated member and contacts the valve assembly for positioning the sealing surface a predetermined spacing from the seating surface.

Abstract: A fluid control valve used in a flow controller has an actuator for controlling the spacing of a valve seat that cooperates with a surface surrounding an orifice in a valve body. The actuator is modulated to regulate the spacing of the seat from the valve body orifice to control flow through the orifice, and to create a seal when desired. The valve seat has a thin metallic sealing disc, compatible with the fluid being controlled that is supported with a fluid, preferably a substantially incompressible fluid, such as a silicon oil, so the disc can conform to surface irregularities and misalignments of the mating surface. The fluid filling will displace or compress to permit the sealing disc to conform to the seat and effect a seal at relatively low valve forces.

Abstract: A molded hopper tee for a hopper truck, tank trailer or the like is disclosed as having a first generally vertically directed hollow pipe section including a laterally outwardly directed flange at an upper end thereof for attachment to the bottom of a hopper and a second hollow pipe section extending generally transversely to the first hollow pipe section and extending beyond the first hollow pipe section on opposite sides thereof and terminating in opposite free ends for attachment to pipeline tubing at a discharge location. Bulk granular material particles can be pneumatically unloaded from the hopper and routed first through the vertically and horizontally directed hollow pipe sections, and then into the pipeline tubing. Opposite free ends of the second hollow pipe section include at least one circumferentially extending metal reinforcing element molded in-situ within and adjacent each free end.

Abstract: A chamber for use in vacuum plants, particularly for treating or storing workpieces or other objects and/or for passing workpieces or other objects therethrough. At least one wall of the chamber has at least one opening through which the workpieces or objects can be introduced or removed. The opening can be closed by means of a closing member including a sealing member which acts together with a sealing surface. The sealing surface is arranged within the chamber laterally of the opening. A circumferentially closed sealing member arranged on the closing member rests against the sealing surface in the closed position of the closing member. The sealing surface has imaginary straight generatrices which extend parallel to the axis of the opening of the chamber. The sealing surface has at least two sealing surface portion which are lateraly offset from each other relative to the axis of the opening and which are connected to each other at opposite locations.

Abstract: The present invention relates to a two-piece valve system for bodies to be filled with gaseous media, liquids, in particular for products for the rubber industry, provided with a valve body embedded in a rubber socket and a valve stem connectable with a thread to the valve body. The characteristic feature of the invention is that the valve body (4) is embedded in its full height in the rubber socket (5), on the inner wall of the throughbore (3) of the valve body (4) a connecting thread (2) is formed, while the outer wall of the valve stem (9) is also provided with a connecting thread (7) and in the inside of the valve body (4) and the threaded end of the valve stem (9) seats (8) are formed for receiving the O-ring (1).

Abstract: A valve element for use in a high pressure pump, the valve element having a body portion with a top side and a bottom side, a guide means attached to and projecting away from the bottom side of the body portion and an insert secured to the top side of the body portion, the insert having a second guide which projects away from the top side of the body portion and an annularly extending flange which defines an annularly extending sealing surface, the insert being formed of a generally non-metallic material having a specific gravity less than the specific gravity of the material forming the body portion and the guide means projecting from the bottom side of the body portion.

Abstract: A quick connect fluid coupling having a female part and a male part which is insertable into the female part to thereby establish the fluid connection between the coupling parts. A metal spring retainer in the female part engages an outwardly extending flange on the male part upon insertion into the female part to lock the coupling parts together. In addition, a shut off valve member is contained within the female part and is movable between a closed position and an open position. In the closed position, a seal ring in the female part sealingly engages a central cylindrical portion of the valve member and blocks fluid flow through the female part. Conversely, upon insertion of the male part into the female part, the male part moves the valve member to its open position and enables fluid flow through the fluid coupling parts. Simultaneously, the seal ring engages the outer periphery of the male part and fluidly seals the male and female parts together.

Abstract: A valve body made of a rubbery elastic material comprising a securing portion which is held by a securing member, and a lip portion which extends from the securing portion and which abuts against a portion to be sealed, which portion to be sealed opposes the securing member.The valve body has an annular recess formed in the base of the lip portion on the side which faces the securing portion or on the side which is opposite to a tip portion thereof. The valve body is so constituted that the gap which starts from the securing portion to the edge of the lip portion is formed on the reverse side of the lip portion when the annular recess is disposed around the lip portion on the side facing the securing portion.