Abstract: A valve flapper door return spring mechanism for an automotive HVAC housing is modified so as to compensate for tolerance variations, so that the door is held in a substantially rattle free return position regardless. One of a pair of resilient spring fingers sits in a V shaped notch created by the intersection of a pair of spring finger stop surfaces that are opposed in slope. The one spring finger can therefore continually seat itself into an equilibrium position at the bottom of the V, and always make solid contact.

Abstract: A fume hood exhaust terminal for controlling gas flow in an exhaust duct has an electrically driven linear actuator for angularly positioning a damper in the terminal. Drive circuitry employed in the preferred embodiment prevents the possibility of shorting out the actuator motor in the event of an input signal condition which would attempt to operate the motor in two directions simultaneously. The circuit also includes a power failure detection circuit which includes the capability of storing sufficient power to place the damper in a preferred position until power is restored to the exhaust terminal.

Abstract: A service valve for isolating the compressor of a chiller system from a flooded evaporator cooler that includes a suction pipe mounted in the top section of the evaporator that extends downwardly into the evaporator shell and a shut-off valve mounted inside the shell that is arranged to close against the bottom opening of the suction pipe. The valve is connected by linkage to a shaft that passes through the suction pipe outside the evaporator which when rotated, permits the valve to be opened and closed.

Abstract: A throttle valve is disposed in a handle of an air tool. The throttle valve includes a throttle trigger provided on the handle of the air tool, and a throttle pin which is fixed to the throttle trigger and adapted to axially move when the throttle trigger is operated. A valve stem having a head portion is coupled with the throttle pin. A valve bush is press-fit into a shoulder portion provided inside the handle on which the head portion of the valve stem rests. A spring is provided to urge the head portion of the valve stem to contact the valve bush and to allow the valve stem to tilt when the throttle pin axially moves. This structure makes it possible to provide airtightness between the shoulder portion and the head portion of the valve stem by a simplified machining. In addition, the airtightness can be maintained for a longer period of time compared to the case of using a washer made of Teflon.

Abstract: The present invention provides a high-performance, economical valve. In the valve, a valve element (4) is supported by a valve element support shaft (6) on an arm member (5) with a degree of freedom of turning, and the arm member (5) is supported by a valve element operating shaft (7) supported on a valve casing (1) at a position thereon spaced a distance apart from a position thereon at which the valve element support shaft (6) supports the valve element (4) on the arm member (5). One end par (4a) of the valve element (4) is biased constantly toward one end part (5a) of the arm member (5). When the valve is opened in a fully open state by applying external torque to the valve element operating shaft (7), the valve element (4) extends along the streamline of fluid flow to reduce head loss due to resistance exerted by the valve element (4) on fluid flow. The valve element (4) is brought into uniform, close contact with a sealing surface (3m) of a valve seat (3) to stop fluid flow.

Abstract: A valve for sealing a pipe opening with a seal plate movably attached to the pipe opening and a valve body fixed to the pipe opening. Moving the seal plate towards the pipe opening closes the valve, and moving the seal plate away from the pipe opening opens the valve. The valve body includes a plate stop to limit the movement of the seal plate relative to the pipe opening. For instance, the seal plate, when forced fully away from the pipe opening, is forced to define an oblique plane that is oblique to the plane of the pipe opening. A method of sealing and then unsealing a pipe opening incorporating such a seal plate is also included.

Abstract: A ball valve disclosed herein is low cost and offers a fast and reliable valve operation. Furthermore, the actuating force the ball valve requires, when it is shut off, is small. The ball valve is capable of fine adjustment of the flow. The ball valve comprises a valve casing defining a flow path of a fluid, a valve seat disposed in the midway of the flow path, a valve element which is in engagement with the valve seat or out of engagement with the valve seat, to shut off the flow path or to regulate the flow rate in the flow path, a control rod inserted into the valve casing and movable upward and downward, and a connecting rod, one end of which is rotatably supported at the inner end of the control rod, and the other end of which is connected to the valve element. The valve element comprises a communication path which communicates with both the upstream side of the flow path and the downstream side of the flow path and an on-off means for opening or closing the communication path.

Abstract: A throttle linkage system for synchronizing the movement between a plurality of throttle valves journaled in throttle bodies affixed to a common member that includes a link that has the same coefficient of thermal expansion as the member to which the throttle bodies are connected so as to avoid synchronization problems due to different thermal expansions. In addition, the linkage system is such that it accommodates manufacturing variations from the more remotely positioned throttle valves by providing a structure for permitting relative movement.

Abstract: A valve appropriate for both shut-off and flow regulation operations is disclosed here. The valve is easy to handle, suffers from low flow resistance in its fully opened state, and offers excellent choking performance. A variety of sizes of the valve can be manufactured in a low-cost manner. The valve comprises a valve seat disposed in the midway of flow passages, and a valve casing which houses the valve seat and the valve element inside. The valve seat has a tilt angle with respect to the direction of the flow of a fluid. The valve element comprises a planar plate as its substrate, and an elongated hole on the back portion of the planar plate. The valve element is held at an initial tilt angle, smaller than the tilt angle of the valve seat, with respect to the direction of the flow of the fluid. A control rod is operative so that the valve element increases its tilt angle from its initial tilt angle.

Abstract: An actuating device for a pivotable regulating flap in a motor vehicle rests against a stop formed on an air passage opening when closing the latter. The actuating device has an actuating member remote from the regulating flap and a connecting rod for converting the actuating stroke of the actuating member into a pivoting movement of the regulating flap. In order to obtain a self-adjusting actuating device without the necessity for readjustment operations, the connecting rod is of two-part configuration, and an elastically compressible connecting member with a prestressing force greater than the actuating force during the closing operation is secured between the two rod parts. The actuating stroke of the actuating member is sized to be larger than the control stroke of the regulating flap for its transfer into a closed position.

Abstract: An improved structure for pivotal fluid valves is disclosed wherein an elongated pivot arm is pivotally mounted through a flexible, resilient corrosion-resistant diaphragm that serves to support and balance the pivot arm and as a frictionless pivot support. One end of the pivot arm provides modulated restriction on an orifice inside the valve chamber to control the fluid flow. The opposite end of the pivot arm is linked to suitable motive power for actuating the pivot arm.

Abstract: A butterfly valve (30) in which an actuator (38) is secured to the plate (36). The actuator (38) is carried with the plate (36) when the latter moves. The plate (36) may be revolvable and translatable relative to the shaft (42). The actuator (38) may be used to open and adjust a pilot valve (94) secured to and carried with the plate (36), and to revolve or translate the plate (36) relative to the shaft (42) in order to vary hydrodynamic torque exerted on the plate (36).

Abstract: An improved toilet flapper valve (10) designed to directly replace either a conventional toilet flapper valve or tank ball valve. The valve (10) allows a toilet user to selectively determine the quantity of water used for a toilet flush by controlling the time that a toilet flush handle (38) is held in the depressed position. The water quantity used depends on whether liquid or solid waste is to be flushed. For liquid waste, a partial flush is used; for solid waste a full flush is recommended. The valve (10) consists of a resilient body having a cavity (12) located over the toilet tank drain (34). The cavity houses a weight (16) that fulfills two functions: it provides the weight necessary to make the valve non-buoyant and it produces under the area of the weight, a flat rigid section (18) that extends radially over and beyond the perimeter of the valve seat (36). This rigid section provides a positive seal without sagging which can produce unnoticed leaks.

Abstract: A valve assembly includes a seat and a valve member. The valve member is pivotally connected to and engageable with the seat to close a flow aperture. The valve member is resiliently yieldably urged into sealing engagement with the valve seat. To open the flow aperture, a portion of the valve member adjacent the pivotal connection to the seat is initially lifted from the seat, and then the valve member is rotated relative to the pivotal connection.

Abstract: The temperature sensitive apparatus controls fluid flow from one line to others and includes an elongated wire of a shaped memory wire that changes in length with changes in temperature extended into a valve housing for pivotally moving valve mechanism in the valve housing against the action of a spring from a fluid flow blocking position to a position permitting fluid flow upon heating the wire. The wire is connected to the valve mechanism and extends through a tube, both of which extend exterior of the valve housing with the major portion of the length of the wire being exterior thereof. The tube extends into a connecting member housing that is attached to the exterior of the valve housing and contains mechanism surrounding the tube to heat the wire. The tube is substantially thermally insulated from the interior of the valve housing. The heating mechanism may include a generator for an electric alternating field to induce a heating current in the wire, or an A.C.

Abstract: a balanced butterfly valve method and apparatus having a valve plate pivotally supported within a mounting body. The valve plate is capable of both rotational and translational movement in response to rotation of an input shaft. A spring is provided to resist translational movement of the valve plate. Differential gearing is used to convert rotational movement of the input shaft into rotational and translational movement of the valve plate depending on the relationship between the force exerted by the spring and the torque exerted on the valve plate by the fluid.

Abstract: A balanced-torque butterfly valve (40) incorporates a pivot mechanism (52) designed to provide for bimodal movement of the valve plate (42). The valve plate (42) has a cavity (54) formed therein to receive the pivot mechanism (52) and to accommodate translational movement of the valve plate relative to the mechanism. This eliminates fluid dynamic effects that would be produced if the mechanism were positioned in the flow path (44) and external to the valve plate (42). The pivot mechanism (52) comprises a center shaft (70) rotatable relative to the valve plate (42), and a carrier shaft (72) which is in fixed rotational relation to the valve plate (42) and extends through the mounting body (46). This permits both translational movement of the valve plate (42), and detection of its rotational position from a vantage point outside of the flow path (44).

Abstract: A butterfly valve method and apparatus (10) employing a variably positionable pivot shaft (30). The apparatus (10) comprises a duct (16), a valve plate (12), and a pivot shaft (30). Near closed rotational positions of the valve plate (12), the plate is pivotally supported by a support shaft (18) which is movably secured to the duct (16). Over a substantial range of open rotational positions, the valve plate (12) is pivotally supported by the pivot shaft (30), which is translationally movable relative to the valve plate (12) so that fluid-dynamic torque exerted on the plate can be altered. The method comprises the steps of rotationally moving the valve plate (12) away from the closed position whereby fluid-dynamic torque is increased, and translationally moving the pivot shaft (30) relative to the valve plate whereby the torque is then decreased.

Abstract: A method for exploiting the net torque exerted by a conveyed fluid on the valve plate of a butterfly valve to facilitate control of the valve, and a butterfly valve (40) adapted for use with the method are disclosed. The method employs translational movement of the valve plate to facilitate rotational movement of the same and to effect dynamic torque balancing. The butterfly valve (40) employs a differential gear (50) as a mechanical resolver to produce either rotational or translational components of movement depending on whether the net torque exerted by the fluid is sufficiently high to overcome impedance to translational movement.

Abstract: A method for opening a sealingly closed, balanced-torque butterfly valve, and apparatus adapted for use with the method. The butterfly valve (40) comprises a valve plate (42) having a peripherally disposed seal (162) seated in an annular recess (160). A flow passage (164, 166) is formed in the valve plate (42) and fluidically connects the recess (160) to the downstream-facing surface of the valve plate. A check valve (168) is disposed in the flow passage (164, 166) to alternately block or permit flow therethrough. Outwardly directed pressure exerted by high-pressure fluid on the seal (162) is relieved by opening the check valve (168) in reponse to a slight translational movement of the valve plate (42) relative to a rotatable shaft (72) which pivotally connects the valve plate to the duct (146).

Abstract: A throttle valve synchronizing mechanism for a plurality of throttle valves interconnected by a linkage system. The synchronizing system includes a pair of pivotally supported levers one of which is fixed for rotation with one of the throttle valve shafts and the other of which is connected to the linkage system. A locking screw arrangement holds the levers in adjusted positions and the locking screw rotates about an axis that is non-parallel to the axes of the levers.

Abstract: A kit and assembly for making an air volume damper for use in the ductwork of a heating and ventilating system. The kit includes a long rod with a single bend at one end to form an L-shaped member, a hinge bracket for being riveted to a damper plate and receiving and captivating the bent section of the rod, a plate for being riveted to the outside of a duct and receiving the rod end through it, and a spring lock or latch member for being pop riveted to the plate and including a spring metal V-shaped section which receives the rod through two holes, one on each leg of the V-shaped section, and secures the rod by spring pressure. Compressing the legs of the V-shaped section together loosens the grip on the rod and allows it to be moved longitudinally to adjust a damper blade.

Abstract: An improvement in a valving device used to dispense and control a high velocity stream of abrasive granular material intrained in a fluid stream. The valving device defines a gun configuration having a handle trigger and a movable valve element pivotally mounted to the trigger and a nozzle. The valve element is a resilient member that is advanced into sealing relation with the nozzle.

Abstract: A dust trap comprising a pair of coaxially mounted dust valves. Each valve has a valve seat and flapper plate and actuator shaft which coacts with the flapper plate to cause it to initially slide and then pivot as the valve opens.

Abstract: A cup trip assembly is disclosed for use on bag-in-the-box and membrane type beverage containers of the type having an outlet nozzle with a manually operable dispensing valve carried at the end thereof. The cup trip assembly comprises a mounting collar adapted to releasably encircle and lock to the nozzle at a location adjacent the dispensing valve. A transversely extending operating member is pivotally carried by the mounting collar at a location axially outward of the nozzle. The operating member has operating fingers extending rearwardly therefrom for engagement with the dispensing valve for moving the valve to an open position when the operating member is rotated in a first direction and moving the valve to a closed position when the operating member is rotated in a second direction.

Abstract: This invention provides an apparatus for transmitting a driving force between two components. The apparatus utilizes a cover rotatably mounted in a housing such that, as a result of engagement between the cover and a first component, a rotation of the cover corresponds to a displacement of such first component. The first component drives a second component by means of an actuator.

Abstract: An improved pivot assembly operable on an air flow controlling disk, initially to move the disk from a closed position over a damper opening to an intermediate open position away from the opening and subsequently to pivot the disk to a fully open position normal to the opening. The assembly includes stationary support plates and carriage plates carrying the disk. The carriage plates are coupled to the support plates by a system including one axle member received in a bore in the carriage plates for movement with the carriage plates dictated by contact of the axle member with camming slots in the support plates. A piston rod to move the carriage plates relative to the support plates is coupled to the axle member.

Abstract: A quick-action valve is opened and closed by a quarter turn. Safe closing with high mechanical advantage is provided, while the valve member is removed completely from the path of the flow upon valve opening. The valve member is fixed to a valve arm, mounted for rotation on a shaft. The valve includes an auxiliary shaft around which an actuating arm with a roller fixed to it are turnable. The roller moves the valve arm, or an auxiliary arm connected to it, so that upon closing it rolls substantially tangentially on a camming surface, thus bringing about maximum force transmission. A few degrees after the dead center position, rotation of the actuating arm is limited by a stop, and self-holding takes place in the closed position. In a preferred version the roller runs in the groove on the valve arm or auxiliary arm.

Abstract: An actuating arrangement connected with throttle valves of suction pipes of an internal combustion engine which are to be actuated synchronously. The throttle valves include bearing shafts and cooperate by way of levers with a linkage of the actuating arrangement. For the compensation of tolerances of the actuating arrangement, especially angular tolerances of the throttle valves, yielding members are provided between the linkage and the bearing shafts, and a device stresses the throttle valves into the closed end positions.

Abstract: A culture bottle assembly has a container divided into two compartments by a flange. A closure and flexible septum seals the container from the outside environment. A frame inside the container is moveable between two positions. In one position the two compartments are sealed from each other, and in the second position fluid communication exists between the compartments. The frame has an elongated member and a skirt. The skirt engages the flange to form a seal. Downward force in the elongated member causes the skirt to flex. Cooperating means create a gap between the skirt and the flange when the skirt flexes. The flexible septum covers the elongated member thereby allowing force to be applied to the elongated member without opening the container. A solid media holder has trays for holding solid media in the upper compartment.

Abstract: A throttle valve with a separate flange, usable with a vacuum pump defining an inlet opening, and a controllable throttle assembly for varying a flow passage cross section of the inlet opening. The throttle assembly is disposed in the inlet opening and has a plurality of slats rotatable about respective longitudinal axes for varying their inclination and an actuating rod for turning the slats. The flange has a throughgoing bore through which the actuating rod passes. The slats have a substantially constant width and their longitudinal axes are oriented parallel to one another. The slats form a first and a second slat group, and a linkage connects the slats with one another for turning the slats of the first slat group and the slats of the second slat group in opposite directions. A chamber is situated externally of the inlet opening and communicates with the throughgoing bore. A pivotal lever articulated to the actuating rod is situated in the chamber and projects outwardly therefrom.

Abstract: This invention relates to a device comprising a sealing valve carried by a control arm inside a vessel and cooperating with a seat around an opening. The mechanism for operating the valve comprises a hollow rotary support housed about its axis of rotation X in a leaktight bearing on the wall of the vessel and connected to the other end of the control arm by means of a device permitting axial displacement of the valve in relation to its seat. In order to reduce the space required for the movements of the valve, the support of the valve operating mechanism is mounted in such a manner that its axis of rotation X forms an acute angle with the vertical axis of the opening of the vessel.

Abstract: An air compressor having a pair of coacting rotors, useful as a supercharger for an engine, has a throttle plate in the compressed-air discharge port of its airend. The plate is carried by a shaft which is journalled in the airend housing. An air bypass channel is formed in the housing, The channel being in communication with the air-end air inlet. A pair of apertures formed in the housing open onto both the channel and the rotors, and flapper valves, pivotably mounted in the channel, monitor the apertures. Spring steel limbs, fixed to the throttle plate shaft engage and disengage the valves, to close and open the apertures, respectively, as the shaft is rotated to open and close the compressed-air discharge port, respectively again, by means of the throttle plate.

Abstract: The end of a damper wire control cable 17 is provided with spaced anchor rings 33. During assembly a notched anchor plate 32 on a mounting bracket 24 or an anchor tab 35 on a cable clamp 21 is engaged in a groove 34 between the rings to firmly fix the cable end and prevent any longitudinal movement thereof, thus ensuring the full opening and closing of the damper. Some embodiments also enable the precise axial positioning or adjustment of the cable end during assembly.

Abstract: A valve actuator for controlling and sensing the rotational position of a valve member includes a positional indicator for sensing the angular position of an actuator shaft, the positional indicator shaft being inductively coupled to a positional indicator circuit. A rotor/stator assembly is provided with a stator such that rotational positions may be sensed as the positional indicator shaft turns through angles which exceed 90.degree..

Abstract: A constant airflow control apparatus is connected to an air duct of an air conditioning system to keep the flow rate of air fed from the air duct constant. The apparatus comprises a rectangular pressure receiving plate slidably mounted on a guide shaft extending in one direction inside a passage of a housing. The plate extends substantially at right angles to the central axis of the housing so as to block part of the cross section of the passage. The apparatus further comprises a coil spring for urging the plate against the flow of the air, and two swinging plates swingably attached to two opposite side edges of the pressure receiving plate, individually. The swinging plates are adapted to change the cross-section area of an air passage defined between the swinging plates and the inner surface of the housing in a mode represented by a quadratic curve in accordance with a rectilinear change of the pressure of the air.

Abstract: A device molding a link member interconnecting an actuator to arms fixed onto valve shafts of rotary valves arranged in gas passages. The link member includes a control rod connected to the actuator and a plurality of plate springs which extend from the control rod and are outwardly bent. The outer ends of the plate springs are pivotally connected to the tips of corresponding arms.

Abstract: A pivotal slide valve for the temperature-dependent regulation of the through flow of a cooling medium, in which for avoiding friction losses, a slight gap is provided between the sealing surface of the pivotal slide valve member and the sealing surface of the housing. For achieving a complete tightness, the pivotal slide valve member is pressed against the sealing surface of the housing when the cooling medium is cold. This is achieved by a corresponding construction of the valve parts between the temperature-dependent working element and the pivotal slide valve member.

Abstract: An air induction system for an automotive air-conditioner has an air switching housing connected to the suction opening of a blower casing. The housing is provided with a fresh outdoor air induction opening formed in the top wall opposing the suction opening, and a recirculated indoor air induction opening formed in a side wall adjacent to the top wall. An air-switching door is provided for selectively opening and closing the outdoor air induction opening and the indoor air opening. The air-switching door is foldable substantially at its mid portion so that, when the door closes the indoor air induction opening, it is folded to provide a small effective area, while, when it closes the outdoor air induction opening, it is extended to provide a large effective area. The system further has auxiliary indoor air induction openings formed in other side walls and an accordion-type shutter for selectively closing and opening the auxiliary indoor air induction opening.

Abstract: A faucet valve comprised of a valve body having a valve seat onto which is adapted to movably and freely rest a disc-shaped valve plug. An operant shaft having a central cam surface is journalled within the valve body, being arranged with the cam surface lying adjacent to the valve plug so that rotating or sliding the shaft causes the plug to tip off the valve seat. The plug is held in closed position solely by upstream pressure. A novel check valve is also disclosed for replacement of the standard washer in a faucet and for use with a "speedway" connection according to another embodiment. The faucet valve is adapted to be fixed to the spout of a tap assembly having hot and cold water, in combination with the check valve, the latter preventing backflow between the two faucet conduits in the event of a pressure differential. The faucet valve may be used independently as may the check valves.

Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine includes a valve means operable to control the spillage of fuel from a high pressure pump. The valve means includes first and second valve elements connected by a pivotal beam carried on a pivot movable in the direction of valve closure when an actuator is energized. The first valve element is biased by a spring to the open position and through the beam the second valve element is held in the closed position by the pressure developed by the pump and the second valve element is urged to the open position by the pressure but can be held closed against the pressure by the actuator. When the actuator is de-energized the second valve element is urged open by the pressure to lower the pressure and the spring then opens the first valve element and closes the second valve element.

Abstract: A precision vacuum melting and casting furnace with a melting chamber containing a melting device. A casting chamber is positioned below the melting chamber. The casting chamber can be raised, lowered, and swung out to the side. The casting chamber communicates with the melting chamber through a valve chamber, which contains a vacuum valve. The valve chamber accommodates a lift platform for raising the mold up under the melting device. The casting chamber has a lifting mechanism, and the vacuum valve has an activating rod. In order to essentially simplify precise alignment of the different movable parts and to convert an existing conventional casting furnace into a furnace in accordance with the present invention, a hollow vertical shaft is attached to the valve chamber. The rod that activates the vacuum valve extends vacuum-tight through the shaft. A sleeve that guides the casting chamber is positioned at the outer surface of the shaft.

Abstract: In a motion transmitting mechanism comprising a linearly moveable member (3) operating to and from an end stop, a compressible spring (9) is arranged between the linearly moveable member (5) and a supporting surface (10), whereby the spring is compressed when the member (5) approaches the end position and gives a force on the member (5) directed away from the supporting surface when the member is in its end position.

Abstract: The control device comprises at least one control ring to which one end of n elbow lever is articulated. The vane pivot of alternating vanes is fixed at the intersection of the arms of the elbow levers. The other end of each elbow lever is connected by a rod to the end of a straight lever, the other end of which is fixed to the pivot of an adjacent vane. The circumferential movement of the ring causes the pivots of the adjacent vanes to pivot in opposite directions. Two other embodiments have two rings.

Abstract: An arrangement is described for pivoting a flap (5) relative to an air duct (1), as used for example in a vehicle heating and ventilation system. A first actuating element (7a) is connected by film hinge (8) to a base plate (4) on the duct, and a second actuating element (7b) is connected by film hinge (9) to the flap (5). The actuating elements (7a) and (7b) are further hinged to each other along a film hinge (10). Movement of the actuating elements 7a, 7b for example by means of a Bowden cable (12) rotates the closure flap (5) about its film hinge (6).

Abstract: An air discharge installation for supplying air into the interior space of a vehicle, in which an air regulating element connected with an actuating device is arranged in a housing within the area of an air inlet opening. To provide an installation which requires a small structural space combined with good and reliable functioning and which further enables a metered control of the air space, the air regulating element includes at least two valve sections pivotally connected with each other which are adapted to be moved from a folded-together, open position in which the two valve sections are disposed one above the other, into an unfolded closing position by way of intermediate positions.

Abstract: A hand-operated dispensing nozzle control valve particularly suited for metered delivery of fuel. The control valve includes a poppet and actuator to initially tilt the poppet on its seat. The actuator arrangement greatly improves controllability as measured by a substantial decrease in required operating force and a reduction in the minimum quantity of liquid which can be dispensed.

Abstract: The delivery of charge material to the hearth of a pressurized blast furnace under the influence of gravity is accomplished without the necessity of changing the direction of material flow at a point exterior of the furnace. The rate of flow of the charge material, which moves in a vertical stream, is controlled by a metering device including a pair of overlapping register elements which define a variable size aperture which remains generally symmetrical with respect to the stream axis.

Abstract: A fluid dispensing nozzle for gasoline or the like includes a valve seat, a poppet valve for controlling flow through the valve seat, a spring urging the poppet valve closed, a valve stem extending into the poppet valve, a handle engaging the valve stem for manually urging the poppet valve away from its seat and a high-level shut-off means for disabling the handle. The poppet valve assembly is constructed to lift one side of the poppet when the handle is initially lifted.

Abstract: An anti-syphon, frost-proof hydrant including a lower body having a fluid inlet, and a fluid outlet defined therein, with a valve seat provided within the outlet where standpipe enclosure member is provided and adapted to be secured to the lower body around the valve seat, to provide a fluid conduit, having and outlet end connected to an upper body having a fluid inlet communicating with the standpipe outlet and a fluid outlet, a valve operator carried by the upper body including a stem member extending downwardly through the upper member and the standpipe and adapted to carry a valve member on the end thereof disposed in aligned relation with the valve seat so the valve member outlet is open and closed by movement of the stem member and where an anti-syphon drain port is provided in the lower body member and adapted to receive an anti-syphon drain device including an enclosure defining a chamber, and adapted to be received in the port, where valve seat means are disposed within the chamber with valve means o