Abstract: Disclosed is a water-supply valve of a washing machine in which the consumption of electric power can be minimized in opening and closing the valve to supply water into and block off the water supply into a washing tub of the washing machine. In the water-supply valve, an actuator rod is elevated against downward biasing force of a spring by a magnetic force of the first solenoid generated by applying an electric current thereto, and then is retained at its uppermost position by the attractive force of the permanent magnet. And, the actuator rod starts to be lowered by a magnetic force of the second solenoid generated by applying an electric current thereto, and is retained at its lowermost position by the downward biasing force of the spring.

Abstract: A bistable solenoid valve with an armature in the form of a movable core disposed within a core guide tube. The armature is resettable by a spring force with one single electromagnetic winding surrounding the tube. The movable core is mechanically coupled with a locking mechanism which is alternately engageable and releasable. A second locking member is longitudinally displaceable against a first member and, in its lifted position, is rotatable through a preset angle. The two locking members, as well as the spring and the movable core, are supported within the core guide tube and surrounded by the fluid medium. The core guide tube is open at one end facing the valve chamber and closed at the other end.

Abstract: Disclosed is a water-supply valve of a washing machine in which the consumption of electric power can be minimized in opening and closing the valve to supply water into and block off the water supply from a washing tub of the washing machine. In the water-supply valve, an actuator rod is elevated against downward biasing force of a spring by a magnetic force of the solenoid generated by applying a voltage thereto, and then is retained at its uppermost position by the engagement between protuberances protruded from the inner wall of the actuator chamber and circumferential strips formed on the actuator rod.

Abstract: The present invention pertains to a mixer valve with electronic control, which incorporates a group of valves (27) arranged in a housing (26) provided in the valve body axially to the coupling (22) which defines the water outlet duct towards the supply mouth. The group of valves consists of a diaphragm valve (30), which is made of an elastic material and essentially has the shape of a small bowl, arranged at the level of a valve seat (32) on the inside of the outlet duct (21), and the group consists of a stop valve (31) which is controlled by an electromagnet (29). The diaphragm valve (30) delimits an internal chamber (35), which communicates, from one component (A), with a mixed water supply duct (24), and from another component (B), with an outlet port (C) which is connected to the drain duct (21) and which is opened and closed by the stop valve.

Abstract: Disclosed is a water-supply valve of a washing machine in which the consumption of electric power can be minimized in opening and closing the valve to supply water into and block off the water supply from a washing tub of the washing machine. In the water-supply valve, an actuator rod is elevated against downward biasing force of a spring by a magnetic force of the solenoid generated by applying a voltage thereto, and then is retained at its uppermost position by a stopper. The stopper has a guide groove of an inverted-heart shape formed therein, which has four guide surfaces.

Abstract: This disclosure relates to a valve including a valve member having: a predetermined surface area on its inlet side exposed to the inlet pressure to produce a force tending to move the valve member to an open position; a larger surface area on its opposite, control side exposed to the inlet pressure to produce a larger force tending to move the valve member to its closed position; a passageway through the valve member; a restrictor orifice in the passageway; and a one-way valve in the passageway permitting fluid flow only from the inlet side to the control side of the valve member, to prevent unintentional opening of the valve member in the event of a drop in the inlet pressure followed by the resumption of the inlet pressure.

Abstract: A reaming pin (70) is provided in a control orifice (34) by which pressure from a main chamber (26) is communicated to a control chamber (36) so as to provide force to hold a main valve member in the form of a flexible diaphragm (12) against a valve seat (14) and thus prevent fluid from flowing from the main chamber (26) to an outlet orifice (32). The control orifice (34) is displaced from the center of the diaphragm (12), but the reaming pin is so provided as to cause the variation in the lateral spacing between the pin (70) and the control-orifice walls to be less than it would be if the reaming pin were a straight, inflexible member rigidly mounted perpendicularly to the plane of the valve seat (14). In one version, the pin (70) is mounted on the diaphragm (12) itself and thus moves laterally with it. In another version, the pin (70') is pivotably mounted on the valve body so as to permit such motion.

Abstract: A two-way cartridge valve for aggressive media has a replaceable module including a main valve seat, a diaphragm sealing member for the valve seat, and a pilot seat. In one embodiment, a leaf spring is employed to bias the diaphragm toward the open position for actuation under conditions of minimal pressure differential. In another embodiment a resilient support is provided for the diaphragm behind the region of engagement with the main seat.

Abstract: A valve assembly is disclosed which is adapted to fit existing valve bodies. A flexible diaphragm assembly positioned within the valve body seals against a cylindrical barrel of the valve body. A central tube positioned within the central barrel defines a bypass passage extending from an upper chamber above the flexible diaphragm assembly and communicating with a bypass orifice. A sealing mechanism operated by an automatic control mechanism is adapted to selectively seal the bypass orifice. The automatic control mechanism includes a proximity sensor.

Abstract: A household appliance, solenoid controlled, pilot actuated inlet water valve has a diaphragm insert with a bleed valve that substantially closes when a main valve is open to reduce water and contaminate flow through the bleed passage. The pilot valve outlet extension has openings to reduce vacuum drawn from the outlet into an actuation chamber thereby further reducing water flow through the bleed passage. The bleed passage is internally and externally configured to reduce contamination impairment. An anti-hammer rib or lip is placed on the pilot valve outlet extension upstream of a guide tip which provides less close-fitting surface that may be impaired by contaminates while still dampening valve closing to reduce valve noise and pipe hammer.

Abstract: A flush valve for use with toilet devices such as urinals and water closets includes a body having an inlet and an outlet. There is a valve seat between the inlet and outlet and a barrel connects the valve seat with the outlet. A diaphragm assembly is positioned within the flush valve and movable toward and away from a closing position on the valve seat to control the flow of water to the outlet. The diaphragm assembly includes a diaphragm peripherally clamped within the flush valve housing and a refill ring extending downstream from the diaphragm. The refill ring has a plurality of circumferentially disposed passages connecting the inlet and outlet when the diaphragm assembly is away from the valve seat. The size of the passages in the refill ring determines the volume of water flow during operation of the flush valve.

Abstract: A pressure-regulating valve system includes a valve body assembly having inlet, outlet and control chambers. A flow valve assembly includes a diaphragm gasket which movably mounts a valve member. The valve member is movable between a closed position, a full flow open position and two pressure-regulating positions intermediate its closed and full flow positions. A full flow bypass valve assembly selectively communicates the control chamber and the outlet chamber for relieving the fluid pressure in the control chamber whereby the flow valve moves to its full flow open position communicating the inlet and outlet chambers. A pressure regulating subsystem includes multiple pressure regulating modules each having a solenoid-actuated valve and a pressure adjustable valve. The pressure regulating modules are connected in parallel relationship to inlet and outlet manifolds which fluidically communicate with the control and outlet chambers respectively.

Abstract: A water powered sump pump has a control housing connected to a source of water under pressure and to a drain pipe located in a sump. An outlet pipe leads from the control housing to a suction generating assembly in communication with the drain pipe for entraining water from the sump for discharge elsewhere. A diaphragm closure normally closes a water passage in the housing and divides the housing into two chambers. A passageway through the diaphragm enables the pressure of water in the two chambers to be equalized. A bleed line communicates between one of the chambers and the sump. A valve responsive to the rise of water in the sump initiates the flow of water through the bleed line, thereby enabling lowering of the pressure in the chamber with which the bleed line communicates and enabling the pressure of water in the other chamber to unseat the diaphragm and open the passage.

Abstract: A flow modulating fluid control valve assembly utilizing a spring biased armature to directly operate a pilot passage in a main flow control valve. An electromagnetic coil assembly opens the valve by shifting the armature and its seal away from the pilot passage allowing the control valve to open and follow the armature until its seal again restricts the pilot passage and achieves a new force balance position for the control valve. Precise modulation is achieved by shaping the force vs. displacement curves for the electromagnetic assembly opening force acting on the armature and the same curve for the spring and other forces acting in a closing direction on the armature so they have substantially different slopes and intersect at a locus of points in the operating range of movement of the armature.

Abstract: A household appliance, solenoid controlled, pilot actuated inlet water valve has a diaphragm insert with a bleed valve that substantially closes when a main valve is open to reduce water and contaminate flow through the bleed passage. The pilot valve outlet extension has openings to reduce vacuum drawn from the outlet into an actuation chamber thereby further reducing water flow through the bleed passage. The bleed passage is internally and externally configured to reduce contamination impairment. An anti-hammer rib or lip is placed on the pilot valve outlet extension upstream of a guide tip which provides less close-fitting surface that may be impaired by contaminates while still dampening valve closing to reduce valve noise and pipe hammer.

Abstract: The valve has a casing with inlet and outlet ports, and a valve opening bordered by a valve seat communicating the ports. A flexible diaphragm defines a control chamber and a pressure chamber on opposite sides thereof and moves between an open position clear of the seat, and a closed position against the seat. The valve seat is within the pressure chamber, and the diaphragm is normally urged closed. A flexible bellows extends between and is sealed to the diaphragm and the casing on a side of the diaphragm remote from the seat. The bellows provides a bellows chamber isolated from the control chamber to enclose an effective area of the diaphragm generally equal to the valve opening of the valve seat. The diaphragm has an orifice providing limited communication between the control and pressure chambers and having a size sufficient to reduce fluid flow between the chambers to reduce diaphragm speed and thus chances of hydraulic hammer.

Abstract: An improved solenoid actuated valve is provided of the type having a fluid pressure-operated diaphragm to move a valve head between open and closed positions. Fluid under pressure at a valve inlet is admitted through a diaphragm port to a control chamber for normally retaining the diaphragm and a valve head carried thereby in the closed position. A solenoid unit is actuatable to vent the control chamber to relieve pressure therein, whereby the fluid pressure at the valve inlet displaces the diaphragm to open the valve head. The opened valve head moves into close proximity with a flow control piston within the control chamber and cooperates therewith to meter fluid outflow from the control chamber in a manner maintaining a minimal or substantially zero pressure differential across the diaphragm. The position of the flow control piston is adjustable to variably select the open position of the valve head in accordance with a desired valve flow rate.

Abstract: A bypass orifice and filter for use in the diaphragm of a toilet room flush valve includes an orifice member adapted to be mounted in the flush valve diaphragm, and a filter element attached to the upstream side of the orifice member. The orifice member has a metering restriction to limit the flow of water therethrough and the filter element has a plurality of openings therein in communication with the orifice member metering restriction. The smallest dimension of the openings in the filter element are less than the smallest dimension of the metering restriction so that any particle in the water passing through the filter element will pass through the metering orifice. In some embodiments the orifice member and filter element are an integral unit.

Abstract: A servo valve controlled by a bistable solenoid valve and activated by the same fluid--liquid or gas--it controls the flow of. A disk is mounted on a differential piston that travels back and forth in the housing. A compression chamber at one end of the piston communicates with a fluid intake and, by way of a seat facing the disk, with a fluid outlet. The piston has an eccentric control bore extending through it. A control chamber at the other end of the piston communicates with the fluid outlet through a depressurization channel and with the compression chamber through the control bore. The solenoid valve has a chamber and seat and an armature that travels back and forth in a tube. The tube extends through a coil on the housing. A gasket is mounted on the end of the armature facing the solenoid valve's seat. The other end faces a head accommodated in the tube. A yoke surrounds both ends of the coil. The depressurization channel extends through the chamber and seat and can be closed off by the plug.

Abstract: A flow control device includes a housing with separate main flow and flow control (servo) passages between an inlet port and an exit port. A control chamber in the housing is in fluid communication with the servo passage. A flexible membrane forms a partition between the main flow passage and the control chamber. The servo passage includes a variable servo orifice upstream of the control chamber and a fixed orifice downstream of the chamber. When the servo valve is open to permit passage of fluid into the control chamber, the resultant pressure on the membrane maintains the main valve closed. The main valve opens in response to closing the servo valve. The fixed orifice has a profile sufficiently small to provide for an acceptable leak or continuous fluid flow through the device when the servo valve is open, and further provides for a soft start when the servo valve is closed to open the main valve.

Abstract: A lower power type, motor-controlled magnetic valve comprising a reversible motor, a speed reducing gear controlled by said reversible motor to move an external magnetic set into a first position in attracting an internal magnetic set or a second position in repulsing said internal magnetic set, causing a plunger to leave from or press against a valve flap, permitting said valve flap to open or close a discharging pipe.

Abstract: A replacement apparatus (50) for converting a manual flush mechanism to automatic operation includes a partition base (76) secured to a replacement cap (68) that forms two spaced-apart openings (96 and 98). A valve operator (58) is so mounted on the replacement cap (68) as to form with the upper surface of the replacement cap (68) a chamber (100) with which both of the openings (96 and 98) communicate. The partition base (76) separates a pilot chamber (26) from a relief chamber (94) that the partition base (76) and replacement cap (68) form. A replacement pilot valve member (102) controlled by the valve operator (58) in turn controls flow through the passage that comprises the openings (96 and 98) and the common chamber (100) with which they communicate. It thereby controls flow between the pilot chamber (26) and the relief chamber (94). The partition base (76) includes a wall (86 ) that is flexible so as to permit a main valve diaphragm (24) to flex.

Abstract: Diaphragm valve with an elastic diaphragm, which is penetrated by at least one balance hole, braced sealingly on the side of the rim by a valve cover, and which closes a pressure vessel and can be moved by setting the pressure on both sides between the valve cover and the mouthpiece of an exhaust pipe; in the closed state said diaphragm valves abuts the mouthpiece sealingly and in the opened state is bent due to the excess pressure on its side toward the valve cover facing away from the valve cover, wherein in the opened state a hole, opposite the diaphragm, in the valve cover is opened by a control valve and is closed in the closed state so that the pressure in the pressure vessel acts on one side of the diaphragm only when the control valve is open and lifts said diaphragm from the moutpiece.

Abstract: A fluid flow control valve has a resilient diaphragm that engages a valve seat. A line contact is formed between the diaphragm and the valve seat at or closely adjacent the outer diameter of the valve seat. This enhances the ability of the valve to seal under low fluid pressures. The diaphragm is reinforced by a plastic reinforcing member which is formed separately from the diaphragm. The reinforcing member and the diaphragm are inserted together in a press fit, and barbed posts on the reinforcing member hold the two together.

Abstract: An automatically operating valve for regulating water flow, especially a mixing valve for automatically mixing hot water and cold water to obtain a mixed water of a desired temperature is characterized by employing piezoelectric actuators for operating valve bodies thereof. Due to such a construction, the valve can not only fully close or open but also carries out the fine flow amount control by regulating the opening rate or angle of the valve body. Especially in case the automatically operating valve is a mixing valve, the mixing ratio of hot water and cold water can be accurately regulated so that the mixed water of a desired temperature can be always automatically obtained.

Abstract: An assembly is provided for the prevention of scalding in showers and other such installations. The assembly includes a valve assembly within a mixed water supply line and a temperature sensitive element for controlling the operation of the valve assembly. The valve assembly is preferably designed to allow some leakage when in the closed position.

Abstract: An improved solenoid actuated, fluid control valve includes a diaphragm which is fluid actuated. Inlet pressure through a restricted orifice into a chamber on one side of the diaphragm acts against the diaphragm and causes closure of the valve, when the solenoid actuated valve in the passage from the chamber to exhaust is operated. When the solenoid or pilot operated exhaust is actuated, then the chamber is depressurized and the fluid flow valve opens.

Abstract: A pilot controlled diaphragm shut-off valve (13) includes a cushion body (22) disposed in a pilot pressure chamber (20). The cushion body (22)operates to gradually allow the build up of pressure in the pilot pressure chamber (20) as water enters through a pilot orifice (21a) into the pilot pressure chamber (20). Such gradual pressure build up in the pilot pressure chamber (20) allows a gradual closing velocity of the shut-off diaphragm valve (13) and thereby eliminates the water hammer phenomena. An actuating diaphragm (32) is provided for opening and closing a pilot valve (24). Alternatively, a float (43) may be employed for opening and closing the pilot valve (24). Either the actuating diaphragm (32) or the float (43) is linked to a stem (23) and lever (26) mechanism, or alternatively to a magnetic linkage (40, 41, 42a).

Abstract: In a power-operated valve in which the pressure of a working fluid is used to control the opening and closing of the valve member in dependence on the condition of an integral power-operated bleed valve, a compensation passage being formed in the valve member to permit working fluid to close the valve when the bleed valve is closed, the compensation passage is formed in that area of the valve member which is bounded by the valve seating and which also defines the cross-sectional area of the inlet chamber, whereby the closing force on the valve member is proportional to the area of the valve housing, thus enhancing the sensitivity of the valve. In a preferred embodiment, a filter is incorporated in the valve member to filter the working fluid to the compensation passage without filtering the bulk of fluid passing through the valve.

Abstract: A solenoid operated flush valve has a main flush valve body including water inlet and outlet means. The main flush valve body includes generally horizontally extending nipple means which is in fluid communication with the water inlet and outlet means. A flow control means is removably mounted within the nipple means and includes valve insert means and solenoid means in cooperative engagement with the valve insert means. The valve insert means includes first and second ends and a side. The valve insert means includes a first passageway extending axially between the first and second ends thereof and a second passageway extending between one of the first and second ends and the side of the valve insert means. The second passageway is in fluid communication with the water outlet means through the side of the valve insert means. Means cooperate with the solenoid means for selectively blocking the second passageway to thereby regulate the flow of water flushing through the flush valve.

Abstract: The pilot type controlled electromagnetic valve system in accordance with the present invention is opened and closed principally by means of automatic remote control.The controlled valve system comprises a main valve F; a pilot valve G for opening and closing the main valve F by means of the fluid pressure on the primary side; a latching solenoid H for opening and closing the pilot valve G; and a solenoid drive control unit I for driving the solenoid H by supplying a discharge current from a capacitor to the solenoid. A pulse discharge current is supplied to the solenoid H from the capacitor C only when the pilot valve G is opened or closed, and no excitation current is supplied continuously through the coil of the solenoid. As a result, the power source battery can be reduced in size, and therefore virtually no accidents take place in the controlled valve system due to no heat generation in the coil.

Abstract: A tubular membrane-tight flow valve features a waisted support body for the membrane which seals against an annular sealing surface at the waist of the support body. This special shape of the support body is effective in avoiding closing hammer. In the preferred embodiment the membrane is made fractionally longer than the waisted support body and this results in extremely quiet operation of the valve.

Abstract: An assembly is provided for the prevention of scalding in showers and other such installations. The assembly includes a valve assembly within a mixed water supply line and a temperature sensitive element for controlling the operation of the valve assembly. The valve assembly is preferably designed to allow some leakage when in the closed position.

Abstract: A faucet has a body with a hollow inner cavity and a spout which opens into the inner cavity. A valve assembly is located within the inner cavity to control the flow of water from a source into the spout. The valve assembly comprises a housing with an inlet chamber which opens into a ring-shaped channel, an outlet chamber having an opening centrally located with respect to the ring of the channel, and a diaphragm to selectively close the communication of the inlet and outlet chambers. A solenoid includes a plunger that is biased by a spring against the diaphragm and an electromagnetic coil to pull the plunger away from the diaphragm. A proximity sensor is included to detect the presence of an object adjacent the faucet and energize the coil. A safeguard alarm mechanism is provided to deenergize the coil after a given interval if the object continues to be detected and thereafter periodically briefly energize the solenoid until the object is removed.

Abstract: An improved valve includes an inlet, an outlet and a valve seat. A flexible diaphragm assembly seals against the valve seat. A bleed assembly extends into a pressure chamber located above the diaphragm for bleeding fluid pressure out of the chamber, thereby opening the valve. The bleed assembly includes a hollow tube inserted into a plastic plunger seat that is carried on the cap of the valve beneath the plunger of an actuating solenoid. Such a bleed assembly does not need a bleed tube having a precisely controlled length, and is not sensitive to flexure of the cap.

Abstract: A volute chamber having an inflow port is provided at the inlet of an extraction hole of a diaphragm valve. The volute chamber is formed with a lid in a hollow portion of a synthetic resin material member of the diaphragm member. The volute chamber is formed with a cap as volute chamber forming piece at the lower portion of the synthetic resin material member. A small projection is formed at the inlet of the extraction hole and protrudes in the volute chamber. A rib having an inflow port is formed partially at the outer surface of the cap. The spinning speed of the water in the volute chamber and the fluid circulation resistance in the volute chamber become large. The water supply to a back pressure chamber reduces and the closing speed of the diaphragm valve decreases. The water hammering action in the water inlet valve can be mitigated due to the rapid closing operation of the diaphragm valve.

Abstract: A push-button operated valve having an optional metering control for regulating the open state of the valve includes optional pneumatic actuation in response to a source of either pressure or vacuum while retaining the metering capability. A plurality of diaphragms, responsive to either mechanically induced or pneumatically induced forces, relocate a magnet for magnetically opening the valve to permit fluid flow therethrough and for controlling closure of the valve in response to the presence of the metering control, which metering control has an adjustable response period.

Abstract: A control valve which includes a main body, a stop valve, a spring-loaded control rod, a support rod and a corresponding shaft, a lid with a fixing element on it, a guide rod and a float cylinder. The float cylinder is restrained only to mover vertically on the guide rod. The stop valve moves vertically in a valve chamber on the upper end of the main body under the influence of water pressure. As water is flushed from the reservoir, the float descends along with the water level and causes the control rod to allow water flow from the upper part of the valve chamber, so that water can flow into the reservoir.

Abstract: The invention relates to flush valves in which an external operating handle is eliminated. An electronic sensor, solenoid valve and a solenoid contained within a single unit to operate a flush valve are provided which is either built into the flush valve or can be retrofitted to a conventional flush valve with an external operating handle. The solenoid valve can also be controlled by external means separate and apart from the infra-red sensor mechanism.

Abstract: A valve controlled by the same medium it handles and released by a preferably electromagnetically activated control valve. Contaminants in the medium that clog up the control bore in servocontrolled valves that employ a differential piston, a relief bore that can be closed off with a control valve, and a control bore that connect a pressure connection with a control space prevent the valve from closing. A mechanism that is especially simple in design is proposed to constantly keep the control bore clean during operation. The control space accommodates a wire spring that rest against the differential piston and against the valve housing and extends through the control bore. The motion of the piston is accompanied by a relative motion between the control bore and the spring that results in a constant cleaning action. The valve is especially practical in water lines and has the advantage of constant self-cleaning on the part of the control bore.

Abstract: A sanitary control back pressure diaphragm valve employed in a sanitary control system wherein the sanitary valve controls the pressure applied to a fluid in a sanitary contained system, which valve comprises: a valve body having an upper and lower valve member defining a generally conical fluid passageway and a valve seat, the members adapted to move between an open position and a closed position; a diaphragm support between the upper and lower members and a resilient diaphragm on the members on the diaphragm support to provide a seal between the upper and lower members and to provide for relative movement of said valve members between the open and closed valve position, the upper and lower valve members defining a generally conical valve passageway between the valve members, and the valve including a pressurized air inlet to provide controlled air pressure of one member; a sanitary fluid inlet extending in a straight line at an angle into the fluid passageway and a sanitary fluid outlet for the discharge of

Abstract: A flow control valve in which a moisture expansible body (18) is adapted to close a bleed valve (24) shutting off a bleed from an inlet chamber (2) through a by-pass (12) to the underside of a thrust plate (9) operatively coupled by a rod (9) to a valve member (26) arranged to close communication between the inlet (2) and an outlet (4) chamber. On absorption of moisture, the body (18) expands to drive thrust rod (21) downwards to close the bleed valve (24) whereby pressure under the thrust plate (9) is relieved and inlet water pressure closes valve member (26) to cut off discharge. On drying the body (18) shrinks relieving thrust rod pressure on the valve (24) which opens under inlet pressure and pressure liquid is bled through passages (25) and the by-pass (12) to drive the thrust plate (9) upwards to open valve member (26) and allow liquid flow from the inlet (2) to the outlet (4) chamber and to discharge (5).

Abstract: A two-port solenoid valve of the pilot-assisted type that is designed to function even when there is no pressure difference between the primary and secondary control passages. A pilot valve actuated by the armature of a solenoid opens and closes a pilot discharge passage, with the armature being also adapted to open the main valve that is connected thereto by means of a lifting spring. The pilot discharge passage immovably provided in the valve housing is intended for suppressing the vibration of the main valve in closing. The pilot valve thart comes in and out of contact with the pilot valve seat at one end of the pilot discharge passage is spring-thrusted in the closing direction and attached to the armature.

Abstract: A pilot-operated diaphragm valve in which the diaphragm seats on a valve seat having an unconstricted flow annulus therearound, and support regions are provided on the valve seat and on the valve body for support of the diaphragm when in closed position. The support region on the valve seat further performs important sealing functions, as does a sealing lip disposed radially-inwardly of the sealing and support region of the valve seat. To stabilize the diaphragm at various partially and fully open positions, and to augment sealing action when the valve is closed, a spring-pressed poppet is disposed above the diaphragm and is guided by a valve stem and bearing. A peripheral region of the poppet bears a certain relationship to the sealing portions of the valve seat.

Abstract: In an exhaust emission control system for an automotive internal combustion engine, an air control valve assembly either directs air flow provided by an engine driven air pump to the engine exhaust ports or to an exhaust system catalytic converter, or diverts the air flow away from the exhaust system. The air control valve assembly has a single diaphragm with three independent diaphragm valve elements, each operated by the air pump discharge pressure.

Abstract: Pleated paper barrier type air filter elements are cleaned by a reverse air jet cleaning system which includes one or more specifically shaped cleaning air valves in which a plurality of jet nozzles or orifices are arranged in a predetermined pattern to provide a totally enveloping air jet which is discharged into a flow tube immediately downstream of the clean air flow chamber of a generally tubular filter element. The jet pattern provides a temporary pressure seal within the flow tube and entrains a substantial amount of ambient air into the reverse flow jet to thoroughly flush elements to clean dust cake from the exterior surfaces thereof. The multiple jet arrangement reduces the overall space occupied by the reverse jet cleaning system and provides a larger mass flow of cleaning air. Multiple jet orifice valves may be configured in virtually any geometric shape to provide a desired jet pattern.

Abstract: A valve acting as a gate valve or as a cock, whose body is divided into two chambers that communicate respectively with the inlet and the outlet. A fixed tubular sealing element is arranged therein, which consists of a flexible sleeve that, when in its swollen configuration, seals the holes of a riddled hollow cylinder in which it is housed, said sleeve acting thus on the flow from the first chamber to the second one through said holes. A third chamber is obtained within said tubular sealing element, a small part of the total flow passing through said chamber; thus, by the regulation of the flow rate of said mirror flow, by means of a stem valve assembly, the automatic regulation is corresondingly obtained of the main flow passing to the outside part of said sleeve, so that the regulation is obtained of the whole fluid stream.

Abstract: A pressure regulating solenoid valve is disclosed which comprises a valve body having a flow path therethrough having an inlet and an outlet. The valve body has a main valve seat within the flow path, and a main valve member mounted within the valve body for movement between an open position, in which the main valve member is clear of the main valve seat for the primary flow of fluid between the inlet and outlet, and a closed position in which the main valve member engages the main valve seat so as to block the primary flow of fluid through the main valve seat. A spring biased combination throttling valve/check valve is interposed within the flow path between the upstream and downstream sides of the main valve seat so as to permit a secondary flow of fluid from the inlet to the outlet of the valve housing when the main valve is closed and when the pressure differential of the flow through this secondary valve seat is above a predetermined value.

Abstract: A rolling diaphragm regulator valve is affixed in a globe type valve body and includes a non-stretchable fabric reinforced liner for covering and uncovering, by rolling action in response to changes in pressure in a control chamber, a plurality of slots in a baffle positioned between the valve body inlet and outlet. An axially movable spring-biased nose cone, mounted behind the diaphragm, provides a surface over which the diaphragm is draped for controlling substantially all movement of the diaphragm. A travel indicator is operable by movement of the nose cone to provide a visual indication of the position of the valve.

Abstract: An improved pulse-jet air cleaner (10) includes an aspirator (32) with a tube (34) extending between a point in the tank (12) where moisture tends to collect, and a point in predetermined spaced relationship adjacent the tank outlet (20) where the airflow is of high velocity and low pressure upon actuation of the pulse valve (24) so that any moisture is automatically discharged through the valve and nozzle (26) on a substantially continuous basis without operator attention or interruption of operation of the air cleaner system.