Abstract: A drain valve device includes a base and a control unit removably disposed in the base. The control unit includes a valve and a resilient component positioned between the valve and the base. The drain valve device opens automatically as soon as water entering the base exceeds a predetermined level. The drain valve device shuts automatically as soon as water entering the base is less than a predetermined level. The drain valve device has advantages, namely simple structure, convenient of use, prevention of intrusion of odor and pests, easy to clean, and unlikely to get clogged.

Abstract: A movable valve for a valve assembly is described. The present valve comprises a plug attached to an immovable mounting flange by at least two non-resilient spider-like legs comprising first and second rigid leg segments that meet at hinging apexes positioned higher than the plug. The plug resists vertical displacement by virtue of the stiff leg segments having appropriately configured curvature and length. Actuation of the valve is through vertical displacement of the plug against the biasing forces, wherein displacement of the plug causes bowing of the legs without any stretching or change in the length of the leg segments.

Abstract: A siphon initiator that has a drive cylinder and an inner stopper. The stopper is held in a limited range of motion by a wire guard at one end and the formed end of the drive cylinder at the other end. The inner stopper seals the lower end of the drive cylinder during the siphoning. Both ends of the drive cylinder have hose fittings. In practice, after attaching the hoses, the user inserts one hose into the container holding the liquid. The other hose is inserted into the vessel to receive the liquid. The user then moves the drive cylinder back and forth a few times to initiate the flow of fluid. The motion alternatively seals the hose and opens it in rapid succession, causing the necessary vacuum within the draw hose to pull liquid from the container to begin the siphoning process.

Abstract: A check valve is provided for use with variable frequency drives and other applications. In one aspect, the check valve provides a poppet guided by a poppet guide in at least two locations to ensure stability between fully open and fully closed positions. In another aspect, the check valve includes a poppet guide adapted to receive a poppet in a stem receiving channel, the stem receiving channel including guide vanes engaging the poppet and auxilliary channels for self cleaning.

Abstract: A relief vent including a vent body having an opening configured to be in communication with the internal volume of a tank. The relief vent further includes a movable portion that is movable relative to the vent body. The movable portion or the vent body includes a base and a sealing member coupled thereto. At least part of the sealing member is elastically deformed to press at least a portion the sealing member against the base. The portion of the sealing member pressed against the base is positioned to sealingly engage the other one of the movable portion or the vent body.

Abstract: A two-way check/bypass valve is connected between the hot and cold water supply lines at hot and cold water faucets located most distantly from the water heater in a building. The valve establishes and maintains convective hot water circulation at a low flow rate from the heater to the most distant hot water faucet, through the cold water supply line, and back to the heater, during the period of time when the hot and cold water faucets are closed. When the hot water faucet is opened, hot water is nearly instantly available. Convective hot water circulation is stopped by the valve when either the hot or cold faucet is opened. The valve also prevents mixing of hot and cold water when either the hot or cold faucet is open and includes provision for dampening any water hammer effect.

Abstract: A diaphragm device for a check valves is provided. The diaphragm device comprises a diaphragm, adapted to cover at least one orifice, and an operation device, adapted to enable movement of the diaphragm substantially along a length axis of the orifice. The operation device comprises at least one first operation organ and at least one second operation organ. The first and second operation organ in turn each comprises a first portion, and a second portion. The first portion of the first operation organ is adapted to be connected to a check valve housing, and the second portion of the first operation organ is connected to the second portion of the second operation organ. Furthermore the first portion of the second operation organ is connected to the diaphragm and the second portion of the second operation organ is connected to the second portion of the first operation organ.

Abstract: A subsea pressure relief valve includes a water-filled nozzle fluidly connected to a hydrocarbon distribution manifold. A valve body is connected to the distribution manifold, with an outlet of the nozzle coincident with an interior water-filled chamber of the valve body. A first seal element is removably seated against the nozzle outlet and an arm is hinged to the body and configured to apply a force along a seal axis and bias the first seal element into sealing engagement with the nozzle outlet until hydrocarbon pressure exceeds a sealing pressure of the applied force and unseats the first seal element from the nozzle outlet such that excess hydrocarbons exit through an outlet of the valve body. A weight is disposed on the arm at a distance from the seal axis.

Abstract: A gravity-activated valve for use in supplying an uninterrupted supply of fluid is disclosed. The valve includes a housing having an outlet, an inlet positioned below the outlet, and a sleeve disposed within the housing. The valve also includes a buoyant piston disposed within the sleeve, which is adapted to move between an open position and a closed position. The piston is positioned above the outlet when the piston is in the open position to allow fluid flow through the outlet and positioned proximate the outlet in the closed position to prevent fluid flow through the outlet. The piston is in the open position when the fluid level exceeds a predetermined fluid level and in the closed position when the fluid level is at or below the predetermined fluid level. The valve further includes a plurality of gaskets, which are adapted to create a seal between the piston and the sleeve.

Abstract: An ejector is provided for an induction system in a vibratory system generating vibration, including a dust ejector for an air induction system of an internal combustion engine. An ejection valve is provided by an inertial mass inertially activated and driven by the vibration to discharge contaminant from the induction system.

Abstract: A check valve includes a valve body defining an internal chamber and a valve seat disposed within the internal chamber adjacent to one of the first and second ends of the valve body. A poppet is mounted for linear movement along a poppet axis within the internal chamber between the first and second ends of the valve body and has a predetermined cross-sectional shape in a direction transverse to the poppet axis, a peripheral rim defining a movement guiding surface, a frustoconical surface provided in one axial end of the poppet and oriented in a direction toward the one end of the valve body, a sealing bead disposed on the frustoconical surface, and a predetermined plurality of passages formed in a predetermined pattern through at least one of the peripheral rim and the frustoconical surface in open communication with an opposed axial end of the poppet.

Abstract: A system and method for controlling and monitoring operation of a valve are disclosed. The system includes an actuator and a switch that, upon being actuated, provides a control signal to the actuator designed to cause the valve to change from a first state to a second state. The system further includes a sensor positioned downstream of the valve, an indicator, and a detection device coupled at least indirectly to the switch, the sensor and the indicator. When not detecting a sensor failure, the detection device allows the indicator to indicate that the valve has changed its state in response to the switch being actuated when the sensor indicates that the valve has so changed. Upon detecting a sensor failure, the detection device prevents the indicator from indicating that the valve has changed its state in response to the switch being actuated.

Abstract: A fluid bearing mechanism using a one-way valve with such a simple structure that high processing accuracy is not required. A one-way valve 6 includes a valve base 7; an abutting portion 11 protruding inwardly, formed with a small communication hole 12 in a center thereof; a moveable element 8 which is moveable inside the valve base 7 in an axial direction; and a retaining body 9 for retaining the moveable element 8 between the abutting portion 11 and itself inside the valve base 7. The retaining body 9 includes ventilation grooves 8b, 9c for communicating an inside with an outside of the valve base 7. When the piston 2 is moved toward the compressing direction, the moveable element 8 is shifted toward the inside of the piston 2 due to the inner pressure of the cylinder 1 and its inertial force, thus opening the small communication hole 12.

Abstract: A check valve (4) controlled by differential pressure, preferably in form of a disk valve, having a closing element (5) that impacts a valve seat (8) with a force by means of an elastic (resilient) element, preferably a closing spring (6). The closing element (5) is provided with an additional mass (11), which is larger in its amount than the mass of the closing element (5) itself to dampen the closing shock in a manner whereby the closing element (5) does not rebound even once or several times and also to dampen the opening shock of a valve of this type as a matter of course.

Abstract: A relief valve assembly for pressure cookers in which the valve port is controlled by a predetermined weight. A skirt portion forming part of the mass of the weight surrounds the valve port so forming a chamber. The skirt portion has an opening in it such that gas entering the chamber from the pressure cooker via the valve port can escape to the atmosphere in a predetemined direction, e.g. away from a hand grip portion.

Abstract: The pressure-vacuum vent is adapted to communicate an internal storage chamber with atmosphere at predetermined pressure and vacuum conditions. The vent includes a poppet valve member that moves upwardly within a body to vent the chamber to atmosphere when the pressure build up in the chamber reaches a predetermined level. A non-deforming mass is supported on the upper wall of the valve member for preventing the member from moving upwardly until the predetermined pressure build up in the storage chamber is reached. A hood assembly overfits the body and includes external and internal hoods. The internal hood is contained within the upper open end of the vent and includes an internal cavity facing upwardly to receive rain and other foreign matter. The external hood includes a sidewall that flares outwardly from an upper opening in vertical alignment with the cavity in the internal hood to a lower end overlying the sidewall of the vent body.

Abstract: A siphon for transferring fluid from a container to either another container at lower elevation or to a disposal area. The siphon includes a tube having an improved one way check valve which valve is inserted into the first container and, by merely shaking the tube up and down, fluid flows by gravity into the second container or disposal area. The valve includes a valve housing having a throughbore with one end of the housing coupled to the tube and the other end mating with an internal movable cup-shaped element to thereby prevent fluid flow past the element when seated in the other end of the valve housing while permitting fluid flow through the valve housing and into the tube when the element moves away from its seating position.

Abstract: The device comprises a steam-escape duct (1) terminated by a valve-seat (3, 4). A shut-off surface (71, 72), realized in a cap (65) at the bottom of an axial cavity (8) slidably mounted on the duct (1), rests, in the service conditions, on the seat (3, 4). The cap (65) is weighted such that its center of gravity is located below the seat (3, 4). The axial cavity (8) is connected to the outside by two eccentric vents (70) causing the cap (65) to rotate by reaction of the steam which traverses them as soon as the cooking-pressure is reached.The device comprises an element (73) permanently attached to the cap (65) and manually displaceable between two positions each of which determines a different lifting pressure for the cap (65) in relation to the duct (1).Use for permitting easy adaptation of the cooking pressure to the kind of food.

Abstract: Apparatus is provided for admixing a relatively small quantity of one fluid with a larger quantity of another fluid in a proportion which remains relatively constant over a wide range of demand flow rates for the mixed fluids. The apparatus comprises a body having an inlet cavity and an outlet chamber in fluid communication therewith through an annular port. A disc-like valving member is mounted for displacement vertically in the chamber into elevations which depend on the rate at which a primary fluid flows through the annular port. A reservoir for a secondary fluid has an upwardly-open orifice and is located interiorly of the annular port. The valving member has a central tapered plug which depends into the reservoir-orifice, and the valving member is weighted so as to be biased downwardly by a constant pressure into a normally-closed position blocking fluid flow through the annular port.

Abstract: A liquid fuel filler cap provided with a valve assembly in a channel extending through said cap said valve assembly comprising means defining at least part of a channel, a valve seat in said channel, a valve member adapted to co-operate with said valve seat to seal said channel, and means to bias said valve member into engagement with said seat, said biasing means comprising a pivoted member comprising a first portion which is adapted to move said valve member, and a second portion, and means for engaging with said second portion and for imparting a turning moment to said pivoted member which is greater than and in the opposite sense to the turning moment imparted to the pivoted member by said valve member alone when the valve member moves away from the valve seat, said first portion and said second portion being on opposite sides of the point of pivotal support of said pivoted member.

Abstract: An exhaust valve, in pressure cooker lids, comprises a vertical tube on which a suitable weight is applied provided with several steam exhaust points which is provided on its free edge with an external thread where the weight is screwed, leaving a free internal space forming a chamber into which the exhaust holes for the steam open, and having on the upper part, a coaxial projection which may penetrate into the internal part of the exhaust or exit tube of the valve.