Abstract: An improved eccentric, rotary plug valve able to control fluid flow in a conduit having a plug assembly including a plug, having a spherical seating surface adjustably fastened to a hub element by a stud, a seat ring retained within a valve housing, a valve shaft engaging said hub element within the valve housing and further engaging suitable actuating means fastened to the exterior of said valve housing and having reciprocating stem motion, an elastically, deformable crank capable of locking on to said shaft and able to convert said reciprocating actuator motion into rotary shaft motion; said stud being threadingly engaged within said hub element and capable of permitting alteration of the geometric location of the center of the spherical seating surface of the plug to match it exactly with that of the seat ring in order to affect tight shut-off regardless of machining tolerances within the housing, hub, or plug, and where the geometry between plug or hub element and the housing interior is very streamlined.

Abstract: A poppet valve assembly is provided. The preferred poppet valve assembly comprises a valve seat, valve head member and actuation arrangement. In the preferred embodiment, the valve head member comprises a flexible seal member and backing member, oriented such that the flexible seal member is positioned between the valve seat and the backing member. In use, the backing member is driven toward the valve seat, trapping the flexible seal member therebetween. The seal member engages the valve seat and is simultaneously deflected backward toward the backing member, which limits deformation of the seal member.

Abstract: A fluid pressure relief system and method for a pressure vessel or tank (10) having a normal vent (16) with a first pilot operated safety valve (18) and an emergency vent (62) having a second pilot operated safety valve (25). A vapor recovery line (20) is connected to relief valve (18) and collected at a vapor storage container (21). A manway (22) on the pressure vessel (10) shown in FIG. 2 defines the emergency vent (62) and a main valve member (66) has a counterweight (74) thereon to urge main valve member (66) to a seated closed position on nozzle (60). The first pilot operated safety valve (18) for the normal vent (16) is shown in FIG. 7 and has a T-shaped body (142) with a main relief valve member (172) at one end of the body (142) mounted for movement in a generally horizontal direction and controlled by a diaphragm (176) at an opposite end of the body (142).

Abstract: The pressure reducing regulator includes a balanced valve arrangement, a sensor being resiliently urged toward a valve seat. A sensor insert is mounted by the sensor for axial movement therewith, the insert mounting the valve stem for movement therewtih between an open and a closed position and limited swivel movement relative thereto to form a more positive fluid seal with the valve seat. The valve stem extends through the valve seat. When the pressure decreases in the variable pressure chamber that is axially between the valve seat and the sensor, the sensor, and accordingly the valve stem is resiliently moved to its open position to allow fluid flow thereinto from the regulator inlet. A relatively weak spring and the inlet pressure in the pressure chamber act to result in the valve stem being moved to its closed position against the above mentioned resilient urging when the outlet pressure is at its desired level.

Abstract: A valve disc and drive shaft assembly wherein the end of the drive shaft seats in a blind bore at the periphery of the valve disc. The end of the shaft or the base of the bore is formed with a tang, extending perpendicularly to the plane of the disc, seating in an elongated recess in the base of the bore or end of the shaft respectively.

Abstract: A fuel pressure regulator with a flexible diaphragm defining in part first and second chambers in a housing and moving a ball valve in the first chamber to open and closed positions to regulate pressure of fuel discharged from the first chamber through an outlet having a seat on which the ball is received when the valve is closed. A cage carried by the diaphragm cooperates with a carrier member or disc fixed to the ball to provide a lost motion coupling between the diaphragm and the ball valve. This coupling permits movement within predetermined limits of the diaphragm generally axially, radially and pivotally relative to the ball while it remains on its seat and upon further generally axial movement of the diaphragm open and partially closes the ball valve to regulate and maintain substantially constant the pressure of fuel discharged from the chamber over substantially the full range of the rate at which the fuel is discharged.

Abstract: A laminar flow control valve having a unitary housing, wherein the valve housing is coupled to a housing for an electrically powered solenoid device. The poppet is loosely secured to the valve stem by use of a magnet, which permits lateral movement between the poppet and the valve stem. In the preferred embodiment, a hemispherical poppet is mounted to the stem of the operating mechanism by a magnet which is fixedly secured to the stem, permitting lateral movement of the poppet to ensure self-alignment with the valve seat upon closing of the valve. An alternative embodiment utilizes conical surfaces of the valve seat and poppet.

Abstract: There are provided a valve which is opened by an improved two-step motion, a valve which operates positively without leakage of fluid even when the difference in pressure between inlet and outlet of the valve is very small, and an improvement of a solenoid valve using those valves.The present invention relates to small-sized opening/closing valve and solenoid valve capable of being operated by very small force and electric power using a dry cell or the like, and is suitable to a solenoid valve for automatic opening/closing control which is used in city gas appliances, etc.

Abstract: A housing having an inlet and outlet and seal ring sealably positioned in each of the inlet and outlet and movable longitudinally. A ball valve element positioned in the housing between the seal rings and having a tubular member rotatable on trunnions. A movable seat ring is connected to opposite sides of the tubular member by fastening means inside of the seat ring and the ring is removable through an openable closure flange.

Abstract: A two-stage reduction valve for gaseous fluids consists of a high-pressure assembly with a high-pressure diaphragm (10) actuating a valve member disposed in the throat of a gas cylinder and of a low-pressure assembly with a likewise diaphragm-operated valve member (21) positioned in a gas duct (18) extending from the high-pressure assembly. A closing rod (30) connected with an operating handle (41) is restrictedly displaceably connected with a diaphragm spindle (14) firmly connected with the high-pressure diaphragm (10) and has at its upper end an essentially cylindrical bore (43) to displaceably receive the lower end of the closing rod (30).

Abstract: An improved pilot valve is disclosed having a flow path from the inlet to the sense cavity via the valve spindle. An articulated disk is provided at the bottom of the valve spindle and is secured thereto by a hollow screw. Such articulated disk can adjust itself to the valve seat below to provide sealing of the valve to the seat in cases where the valve spindle is not perfectly axially aligned with the seat. A spacer between the upper and lower diaphragms is provided for maintenance of proper effective areas of such diaphragms and for prevention of resistance to valve stem motion.

Abstract: A control spear serves to close and to controllably open a valve passage in a passage for conducting a dust-containing gas at temperatures of about 400.degree. to 1200.degree. C. The control spear comprises a shaft and a frustoconical head which cooperates with the valve passage. The shaft is movably mounted on the head and is preferably resiliently biased against the shaft.

Abstract: A check valve for use in an oral inflation valve has an articulated connection between the valve head and valve stem. The valve stem has a trailing end in the form of a spherical ball and a socket carried by the valve head rotatably receives the ball so that the valve head may skew about an axis of articulation when the valve is open. The trailing end of the valve body is flat and the mating surface of the valve head is flat so that the head seats squarely on the seat when the valve is in repose. The flat trailing end of the valve body is coincident with the axis of articulation. In a second embodiment, the ball and socket are not spherical, but are of frusto-conical configuration to facilitate assembly of the device.

Abstract: A laminar flow control valve has a valve housing with an inlet and an outlet, an orifice plate, a poppet, an operating mechanism such as an electrically powered proportional solenoid, and a mechanism for realigning the poppet and orifice plate to maintain selected surfaces of those components in substantially parallel relation. The gaseous flow is throttled between respective parallel surfaces of the orifice plate and poppet such that the volumetric flow rate is linearly proportional to the pressure differential across the parallel surfaces. The poppet is mounted to a stem of the operating mechanism so as to be free to move in more than one plane relative to the orifice plate. In the embodiment illustrated, the poppet is free to swivel so that the metering surfaces "self-align" each time the valves close. The preferred embodiment of the invention utilizes a flat orifice plate and poppet. The poppet is attached to a stem of the operating mechanism by mechanical means.

Abstract: A ball-type sealing device is disclosed for preventing fluid flow out of an orifice wherein the sealing ball is mounted in a body member so as to have both radial or transverse and axial degrees of freedom. The sealing ball, which has a diameter greater than that of the orifice, is mounted in a chamber defined by the body member such that a portion of the ball extends through an aperture in the end of the chamber to the exterior of the body member. The sealing ball is positioned by a pushrod slidably extending into an elongated hole defined by the body member such that one end of the pushrod, having a first contact surface S.sub.1, is in contact with the sealing ball. The opposite end of the pushrod is associated with a second contact surface S.sub.2 which has an area smaller than the contact surface S.sub.1.

Abstract: A control valve, in which a valve body opening and closing a valve mouth is driven by a strain force of a piezostack, characterized in that an upper fixed portion of said piezostack is supported by a ring-like tapered surface or a spherical surface and a lower movable portion of the piezostack is combined with a valve body through a spherical bearing.The strain output can be surely transmitted to said valve body by holding the piezostack so that no movement other than a strain resulting from the application of voltage may be produced.

Abstract: A water injection valve for use in a well bore having a cylindrical valve body with an axial water passage, a cylinder slidably mounted therein with an upstream control shoulder, lateral fluid ports in the cylinder upstream of the seal between the cylinder and the valve body and an open downstream end which restricts fluid flow when the cylinder impinges upon a conical valve seat. The cylinder is adjustably biased away from the valve seat by a spring and permits fluid flow no greater than a predetermined maximum rate despite increases in pressure differential across the valve.

Abstract: A medical vacuum regulator (10) with a vacuum regulation chamber (20, 34) connected with a supply of unregulated vacuum (26) through a regulation control valve seat opening (24A) controlled by means of a valve head (28, 28A) at one end of a valve stem (30) extending through a valve stem guide (32) and coupled at its opposite end to a movable wall (36, 38) of the regulation chamber (20, 34) is provided with an antibinding valve stem connector assembly (12) comprising a ball and socket connector (46, 48) respectively coupled to the valve stem (30) and the movable wall (36, 38) to enable relative movement between the valve stem guide (32) and valve stem (30).

Abstract: In known injection valves having a spherical valve closing member, it is difficult to center the valves. In the novel injection valve, self-centering is precisely achieved. In a valve having a spherical valve closing member on which a restoring spring is supported and which is located facing the end of the core of an electromagnet, it is proposed that a centering ring of soft magnetic material be disposed between the spherical valve closing member and the core end face. The injection valve is particularly well suited for fuel injection systems in internal combustion engines.

Abstract: A fuel pressure regulator valve of the type commonly used in automobile fuel injection systems. The invention relates to improved retention of the valve element within the mount that is carried by the diaphragm assembly. The valve element is a truncated sphere and the retention is by means of a circular washer that fits into a circular recess formed in the mount around the cavity that contains the sphere. The truncated circular face of the sphere protrudes through the washer so that it can coact with the valve seat. The inside diameter of the washer is closely controlled and this controls the allowable travel of the sphere within the cavity. The washer is retained on the mount by crimping the edge of the circular recess over the outside diameter of the washer.

Abstract: A brake booster having a brake valve disposed inside a booster piston, the brake valve comprises a valve bushing including a valve seat and a slide that is pressed by a spring against the valve seat of the valve bushing. The slide is supported with play at a great distance from the valve seat, so that it can be pivoted slightly around the vicinity of its bearing. The pivotability of the slide facilitates its centering in the valve seat, so that the valve closes dependably even in the presence of bearing tolerances or valve seat tolerances. Seals required for sealing off the slide have an elastic behavior, and are disposed in the vicinity of the bearing. As a result, reliable sealing is assured despite the pivotability of the slide.

Abstract: A brake valve for brake boosters in which a slide is guided in a sheath that is supported in rounded fashion at one end face, such that the slide, along with the sheath, is pivotable and can center itself, with a bezel formed onto its end face, in the valve seat of a valve bushing. The slide and valve bushing form a valve in which the closing behavior is improved considerably by the automatic centering of the slide in the valve seat.

Abstract: A pressure balance type solenoid controlled valve suitable for use under contaminated environments. The valve comprises a body, a solenoid mounted in the body, an armature mounted in the body movably by the solenoid and a poppet valve connected to the armature. The body has a sleeve loosely fitted thereto and a fluid passage formed therein. The poppet valve is provided with a seat portion for switching the fluid passage formed at a front end thereof. The poppet valve is pivotally connected to the armature at a rear end thereof. The poppet valve has an outer diameter substantially equal to a diameter of the seat portion at an intermediate portion between the front end and the rear end. The intermediate portion is slidably inserted into the sleeve. The poppet valve has a passage formed therein for equalizing pressures applied to sides of the sleeve.

Abstract: A valve body comprises a first sealing seat and a second seat opposite the first. The valve element is selectively controlled so that, in addition to the position in which a bearing surface thereof rests on the first seat to ensure tightness of the device and of the circuit on which it is mounted, the valve element can be placed in a median position between the two seats, so as to provide a maximum flowing section between the valve element and the valve body for draining the circuit. In intermediate positions, another bearing surface of the valve element works in cooperation with the second seat, the valve element being held in a position selected between the first median position and a resting position on the second seat, thus limiting the flowing section between the valve element and the second seat to control the discharge of the circuit.

Abstract: A valve wherein the housing has an internal seat having a sealing face which surrounds a seat area that is inclined with reference to the axis of a stem for the valving element. The sealing face is tapered and forms part of a conical surface. In order to ensure that the valving element is pressed against the sealing face, the line of action of the force which is applied by the stem is eccentric to the axis of the conical surface.

Abstract: A vacuum regulator valve unit has a valve body and a coil assembly that define a chamber. The valve body has an air inlet passage opening into the chamber. A washer overlies the valve body within the chamber and has an air inlet port aligned with the passage and a valve seat surrounding the port. The coil assembly supports a shaft projecting into the chamber. A valve member is mounted loosely on the shaft within the chamber and slides on the shaft into and out of engagement with the valve seat in response to energization and deenergization of the coil. The valve body has a peripheral annular ledge that cambers the washer to assure full engagement of the washer with the valve body at the perimeter of the port. The shaft has an undercut taper that articulates the valve member to allow the valve member to align with the valve set and thereby assure full engagement of the valve member with the valve seat.

Abstract: A relief valve for low pressure operation includes a valve body having an enlarged cylindrical bore in alignment with an inlet port and defining a valve chamber. An outlet opens laterally from the valve chamber at a location spaced from the inlet port. An insert member is received in the bore and defines an axially facing raised seat circumferentially about the inlet port at a location closely adjacent the outlet port. A poppet valve with a truncated conical configuration and a maximum outer diameter only slightly less than the inner diameter of the enlarged bore is mounted for engaging the seat and blocking flow through the inlet. A biased stem extends into the valve chamber in axial alignment with the seat insert. The stem has a cylindrical end portion which is received in a cylindrical opening formed axially into the poppet valve on the end thereof opposite the seat insert.

Abstract: A mechanism wherein a poppet for opening and closing a valve seat which is disposed on the internal peripheral surface of a body has the outside diameter on the side opposite the valve seat made slightly smaller than the outside diameter on the side of the valve seat. An abutment portion of poppet is formed as a convergent tapered surface, and when the valve is closed, the poppet is slidably moved in an aligning direction with respect to the body.

Abstract: A rotor is provided for use in combination with a stator and sleeve to function as a valve attached to an actuator. The rotor is comprised of a rotor body containing the drive section with the necessary elements to turn the rotor within the stator and sleeve, and a rotor stem with parts to act with complementary parts on the sleeve to form variable orifices that function as the valve. The rotor body is connected to the rotor stem by a flexible joint which includes a contoured surface to compensate for misalignments in the system.

Abstract: A special control valve plug is disclosed. It includes the integral combination (1) of a spherical radiused or ball type seating surface and (2) a conically tapered flow control tip. When the valve is closed, the spherical radiused plug seating surface provides a positive fluid seal. When the valve is open, the tapered tip provides precise proportionate and continuously variable control of fluid flow.

Abstract: An improved valve assembly is provided for dispensing liquid from bulk containers. The valve assembly includes a tubular housing defining a cylindrical chamber open at its ends. The housing is connected with an opening in the liner of the container to afford fluid communication between interior of the liner and the chamber. The valve assembly includes a valve shaft having end portions rotatably connected with the housing and a cylindrical body portion extending transversely across the chamber. The shaft body portion contains a slot extending between the end portions for receiving a generally circular butterfly valve disc. The disc has a maximum diameter corresponding with the diameter of the chamber and a minimum diameter corresponding with the length of the slot. An O-ring is connected with the outer edge of the disc. When the valve shaft is rotated to an open position, the disc is arranged longitudinally of the chamber to permit the flow of liquid from the container through the chamber.

Abstract: A swivel bellows assembly designed to be mounted within a valve housing to provide self-alignment with a valve opening. The bellows assembly comprises a mounting element having a central opening surrounded by a depending, contoured skirt, or wall, a bellows unit having a central contoured well which receives said skirt or wall, and a retainer disc or cup which confines said skirt or wall within said well to permit relative angular adjustment of the bellows unit.

Abstract: A rotor is provided for use in combination with a valve and sleeve to function as a valve attached to an actuator. The rotor is comprised of a rotor body containing the drive section with the necessary elements to turn the rotor within the sleeve, and a rotor stem with ports to coact with complementary ports in the sleeve to form variable orifices to control fluid flow, and a flexible means for connecting the rotor stem to the rotor body.

Abstract: A magnetic valve for use with vacuum which has an improved junction between the stem and the valve disk which prevents detritus from impairing the seal of the valve. The valve has a magnetic drive coil outside a vacuum tight casing and an armature within the casing to which a valve stem is connected. A junction between the valve stem and the valve disk includes a head on one of the two components and a beaded margin enveloping the head on the other of the two components. An annular gasket is disposed between the head and the beaded margin.

Abstract: An inverted bellows valve has a two-piece stem interconnecting the valve and actuator for reciprocating axial movement of the stem tip. Tapered surfaces are advantageously utilized between cooperating elements for self-centering the valve assembly. An annular gland disposed along the exterior of the valve stem has concentric inner and outer O-rings which permit the stem to float and compensate for misalignment. A wobble collar is also disposed in abutting engagement with the stem to compensate for uneven spring forces which could otherwise cock the stem. The bellows subassembly is removable in one piece to facilitate maintenance and replacement.

Abstract: A pressure regulator having a housing with a chamber disposed therein. A diaphragm is sealingly connected around the inner periphery of the housing for dividing the chamber into two parts. A first port is fluidly connected to a first part of the chamber and is adapted to be attached to a fuel return line. A second port is fluidly connected to the first part of the chamber and is adapted to be fluidly attached to a fuel rail having fuel injectors attached thereto. A third port is fluidly connected to the second part of the chamber and is adapted to be fluidly connected to an intake manifold of an internal combustion engine. A resilient flat washer is attached around the outer periphery thereof to the housing, adjacent to the first part. An elongated valve member is disposed in the first part of the chamber and has one end thereof adapted to be selectively and sealingly received within the opening in the washer.

Abstract: A fluid flow regulating device comprising a housing defining an inlet, an outlet orifice, and a fluid flow passage therein between the inlet and the outlet orifice, a movable piston in the housing having an upstream surface and a downstream surface exposed to fluid flowing through the passage, means for providing a drop in pressure between the upstream surface and the downstream surface as a function of fluid flow rate through the device, and a closure member that is connected to the movable piston and has an externally curved surface that is movable between positions adjacent to and in front of the outlet orifice as the piston moves in response to changes in the magnitude of the drop in pressure.

Abstract: An extremely accurate and reliable fluid pressure sensor for monitoring process pressure and sensing when predetermined pressure set points or limits have been reached. A Bourdon tube with a pivotally moving lever end responds to the process pressure. When the process pressure is within the desired pressure range, a fluid operated block and bleed relay is operated to provide a first pressure level at its outlet. As the preset pressure point is reached, the relay is operated to provide a change in the outlet pressure level for actuating suitable safety units. A pivoting beam responds to pivoting movement of the Bourdon tube lever arm about the pressure set points and effectively amplifiers or increases such movement to rapidly operate the relay. Snap-acting cap means with a self-aligning disc cap a nozzle port in the relay in response to pivoting beam movement.

Abstract: An improved pin actuated valve wherein the pins are split to separate the actuation function from the alignment function of the pins.

Abstract: An electromagnetically actuatable valve is proposed, which serves in particular to inject fuel into the intake tube of internal combustion engines having fuel injection systems. The fuel injection valve includes a valve housing, a core having a magnetic coil and an armature, which is guided by a guide diaphragm and is firmly connected to a bearing tube. Protruding into the bearing tube is a spherical pivot segment of a valve member, which is on the one hand partially surrounded and engaged by a pan-shaped segment of the bearing tube and on the other hand is axially fixed by means of a retainer ring. Joined to the pivot segment is an elongation segment, on the other end of which a spherical sealing segment is secured, and which is further radially guided by means of a guide ring and thereby cooperates with a valve seat in a nozzle body. Since the pivot segment is pivotably supported in the bearing tube, shear forces at the armature have no effect on the sealing segment.

Abstract: Filling and discharging valve for inflatable hollow bodies, particularly dinghies, comprising a valve housing having a radial flange adapted to be attached to the inflatable body and a valve seat facing the interior of the inflatable body, the valve seat co-operating with a plate-like valve member. A spring is located within the valve housing and biasing the valve member towards the closed position thereof. Holding means hold the valve member in the opened position. A dead center spring above the valve member includes a dead center spring which is secured to the circumference of the valve housing. The dead center spring holding the valve member in its close position above the dead center and holds the valve member in its opened position below the dead center.

Abstract: A reversing valve construction having a housing provided with a chamber carrying a movable valve member therein that controls ports of a valve seat of the housing through the relative position of a cavity of the valve member relative to the ports, the ports comprising first, second and third ports disposed in spaced apart and straight line relation and the cavity bridging the first and second ports while exposing the chamber to the third port when the valve member is in one position thereof and bridging the second and third ports while exposing the chamber to the first port when the valve member is in another position thereof. The valve member carries a flexible annular sealing member that is disposed between an annular surface of the valve member and the valve seat and surrounds the cavity to seal the cavity to the valve seat while permitting sliding movement therebetween.

Abstract: A valve for sealing off pressurized fluid for an extended period comprises, a body defining a passageway, a closure member in said passageway for closing off the latter against fluid flow, a pivotally mounted arm for maintaining the closure member in its passageway closing off condition, and a catch for releasably retaining the arm in the valve closed position. In one arrangement, the closure member includes a diaphragm which extends across and divides the passageway and is arranged to burst under a sufficient pressure differential, the arm carrying a backing plate which, in its valve closed position is superimpositioned against one face of the diaphragm to prevent it from bursting.

Abstract: In a bellows-actuated thermostatic steam trap (A) having a bellows (41) carrying a valve member (45) of a valve (45/22) for opening and closing the trap, the bellows is disposed between connections (20/21 and 30/31) which are identical to one another so as to be selectively connectable in a steam flow line with the valve (45/22) disposed either downstream of, or upstream of, the bellows (41). The trap includes a metal housing (11/12), the mass of which constitutes at least 70% of the mass of the trap. The trap operates, when connected with the valve disposed downstream of the bellows, in a first mode in which, in normal operation, the trap discharges condensate at a temperature close to saturated steam temperature. When connected with the valve disposed upstream of the bellows, the valve operates in a second mode in which in normal operation condensate is discharged at a temperature significantly below steam temperature.

Abstract: A pressure control valve which serves to control a determined medium pressure. The pressure control valve includes a medium chamber with an inlet opening and an outlet opening for the medium to be controlled, separated by a membrane from a spring chamber with a valve spring. On the membrane, a valve member is floatingly disposed via a ball-shaped support member, which acts together with a valve seat. The outlet opening is disposed upstream of the valve seat in such a manner, that during a medium pressure to be controlled the valve member lies upstream of the outlet opening and together with the latter controls the flow of the medium to the valve seat, while during a medium pressure below the valve member descends with throttling action to a greater or lesser degree into the outlet opening and blocks the valve seat at a predetermined lower medium pressure.

Abstract: A rotary valve assembly for use in regulating the flow of molten material includes a stator member having therethrough a flow opening and adapted to be fixed to a source of molten material with the flow opening communicating with such source. The stator member has therein a rotor-receiving opening interrupting the flow opening and defined by a conical bearing surface. A frusto-conical shaped rotor member extends into the rotor-receiving opening, and the rotor member has an outer surface complementary to the bearing surface of the stator member. The rotor member has extending laterally therethrough a flow opening which, upon rotation of the rotor member with respect to the stator member, may be moved into and out of alignment with the flow opening of the stator member. A power driven device is provided to rotate the rotor member with respect to the stator member, thereby to selectively regulate the relative degree of alignment of the flow openings.

Abstract: An improved valve-strainer body or housing is disclosed wherein a single structure is adapted for use as both a valve housing for globe valves, gate valves, check valves and the like, and also utilized as a casing for a strainer. The housing is sized such that the single housing may be utilized in differing sized pipeline systems from approximately 1/4 inch IPS to 1 inch IPS. The invention also discloses superior means of using the valve body casing in connection with not only threaded pipe systems, but also brazed pipe systems and welded pipe systems. Finally, improvements in the valve assembly structure is also disclosed.

Abstract: A relief valve (10) incorporating a poppet assembly (14) having a metallic sealing disc (46) in engagement with an annular valve seat (34). The disc is acted on by a ball (44) received within a recess formed in the end of the poppet stem (36). The disc and the ball are retained in free-floating relationship with the stem by means of a cylindrical retainer (40), which allows the ball to center itself over the disc and valve seat and thus effectively apply the closing force at a point at the center of the disc. The point application of the closing force causes the disc to flex a finite amount, which causes the disc to contact the inner edge only of the annular valve seat, thus approximating an ideal knife-edge engagement between the valve seal and the seat.

Abstract: A valve assembly is provided for controlling the recirculation of exhaust gases in an internal combustion engine. The assembly includes a fixed body portion having an exhaust inlet and an exhaust outlet port and a moveable transducer portion. A diaphragm is attached to the body and transducer portions to define a vacuum chamber and an atmospheric chamber in the body portion and a second atmospheric or air bleed chamber and an exhaust chamber in the transducer portion. Passages integrally formed in the diaphragm at its point of attachment to the transducer portion provide fluid communication between the two atmospheric chambers. Valve means are provided between the transducer atmospheric chamber and the vacuum chamber and between the exhaust inlet and outlet ports.

Abstract: An electrically operated control valve adapted to fit within a bore of a cooperating apparatus. The valve including an interchangeable stator and lower body member. The valve further includes a valve means having a swingable self-aligning valve closure element.