Abstract: A stop valve includes a valve body, a multi shot resilient control sleeve, O-ring and handle. The control sleeve is molded to the valve stem to create an integral but separately molded fluid control member. Inlet line pressure resiliently biases the side walls of the control sleeve and a circumferential sealing flap formed thereon into sealing engagement with the valve bore to prevent leakage. The control sleeve consists of a hard plastic cylinder and a flexible barrel member molded as one consistent piece by a multishot molding process. The O-ring also serves as a backup seal to prevent leakage to atmosphere. A valve handle is secured to the valve by either a screw or a snap protrusion.

Abstract: A plug valve is provided that may be lubricated while in service. The invention provides a high-pressure valve having a valve body containing a plug allowing bi-directional flow and moveable between an open and closed flow-through position. The valve permitting lubricating and sealing while in-service and in the closed or open position. The lubricating and/or sealing mechanism includes channels formed through the plug to a lubricant groove or grooves formed on the outside surface of the plug between the ends of the fluid conduit through the plug for directing lubricant to the plug-insert or plug-valve body interface when the plug is in the closed position and lubricant to the relief area formed by the insert when the plug is in the open position.

Abstract: Valve sealing assemblies and methods of sealing a valve engaging member to a valve body. A first seat member is fixedly disposed within a valve body pocket. Two seal rings are disposed between a valve pocket and a pocket insert and a seal ring is disposed between the pocket insert and a seat member to provide a downstream seal. A built-in lip on one of the seat members and an accommodating groove on the other seat member prevent debris from entering the space between the two seat members. A retainer ring on the exterior annular surface of pocket insert seat member retains the pocket insert within valve body. A retainer ring on the exterior annular surface of the seat member retains the seat member within the pocket insert.

Abstract: A plug valve and fluid control method according to which a cylindrical plug is provided in a bore of a body member and has a through passage formed therein. The plug is adapted to be rotated about its axis to move the passage between an open position in which it is in alignment with passages in the body member to permit fluid flow through the body member, and a closed position in which it is out of alignment with the passages to prevent the fluid flow.

Abstract: A new, unique combination of the tractrix valve and the tractrix stem seal is described as an improvement over the original patents issued. The plug and the stem seal are juxtaposed large end to large end. The stem seal functions as a fluid seal and as a journal bearing. The purpose of the tractrix valve is to prevent leaks through the seat of the valve and to the outside environment past the stem seal by use of long-term self-renewing tractrix surfaces that continue to mate after continued use.

Abstract: A pistol grip hose nozzle is disclosed which allows proportional water control in accordance with the position of a rotatable valve. The hose nozzle has a handgrip section with an inlet water passage and an outlet section with an outlet water passage. One end of the handgrip section is connectable with a hose. The other end of the inlet water passage ends in a valve seat with an aperture. The valve seat contains a valve having a flow control cylinder. The flow control cylinder has a non-circular opening which when aligned with the aperture allows water to flow to the outlet water passage. The flow control cylinder is attached to a control knob which allows a user to grip the hand grip portion and rotate the control knob and the flow control cylinder to vary the water flow. The non-circular opening allows the amount of water flow to the outlet water passage to be linearly proportional to the rotational position of the control knob.

Abstract: A stop valve for water pipes includes a body, and a valve block. The body has a through hole extending from one end to other, and a cylindrical holding hole on one side to communicate with the through hole. The valve block has a transverse hole, and is disposed in the cylindrical holding hole so that water can flow through the through hole when the valve block is open where the transverse hole is aligned with the through hole of the body. In addition, the valve block is formed with a cylindrical shape so that it can be stably held in position by means of those portions of the body that define the cylindrical holding hole to secure a tight contact of the valve block with a leak-prevention ring equipped around one inner end of the through hole.

Abstract: A medical stopcock is provided that is constructed and arranged to withstand high pressures and gamma irradiation. The stopcock generally includes a housing and a valve member. The valve member is trapped within the housing so that, when subjected to relatively high pressures, the valve member is unlikely to become separated from the housing. A handle member is attached to the valve member and allows the valve member to be rotated from open to closed positions. In some preferred embodiments, the handle member locks the valve member within the housing, when attached. All of the components are constructed of gamma-stable materials so that the stopcock may be sterilized, in its package, using gamma irradiation.

Abstract: A fitting including a housing (2), a rotatable body (4) which is situated in the housing and which may advantageously be constructed in the form of a conical plug, a bushing (18) provided in the housing to floatingly mount and seal the rotatable body (4), a cover (14) connected to the housing (2), a shaft (12) coupled with the rotatable body (4) and extended out through the cover (14), and at least one sealing element (30, 44) associated with the shaft (12). The fitting is configured in such a way that the bushing (18), the at least one sealing element (30, 44), and the cover (14) can be positioned and mounted centrally and free from transverse forces in relation to the axis (10) of the floatingly mounted rotatable body (4).

Abstract: A rotary throttle valve having a first cylindrical bore for flow of air between an inlet and an outlet and a second cylindrical bore orthogonal to the first bore and being substantially the same diameter as the first bore. A flow modulator rotatably disposed in the second bore has first and second cylindrical portions disposed respectively on opposite sides of the first bore and separated by a central plate such that when the modulator is rotated to place the plate transverse to the first bore, the edges of the plate are fully engaged with the wall of the second bore and the valve is closed. As the modulator is rotated from the closed position to open the valve, the edges of the plate become progressively less engaged with the wall of the second bore, the edge of the open area following the juncture lines of the first and second bores.

Abstract: A shutoff valve that in open state provides unobstructed straight flow through of the carried media. Operating without any critical metal to metal contact by utilizing elastic seals. The valve can be easily disassembled and reassembled without the use of tools, and constructed with fully interchangeable, replaceable and autoclavable parts.

Abstract: Pulsating vibration air generation apparatus comprising a cylindrical casing having an air supply port connected with an air source and a wave transmission port provided at the circumferential surface thereof, and a drum type rotary valve constructed rotatably in the casing, wherein the air supply port is located where a circumferential surface of the rotary valve is positioned when the rotary valve is contained in the casing, the wave transmission port is located apart from where the circumferential surface of the rotary valve is positioned when the rotary valve is contained in the casing, the drum type rotary valve is comprised of a rotary support shaft at a center axis, one end of the rotary valve is opened, another end of the rotary valve is closed, at least one ventilation window is provided at the circumferential surface of the rotary valve, the rotary valve is contained in the casing in such a manner that the open end of the rotary valve faces to the wave transmission port of the casing, and the at lea

Abstract: A rotatable stopcock for a plug-type coupling with an angled piece for connecting fluid lines. The stopcock including a turning knob portion and an integrally formed hollow pin portion. The knob portion includes two opposing ring segments having detent catches that positively engage a flange ring formed on the coupling housing wall. The pin portion is dimensioned to be received into a contact hole of the plug-type coupling such that rotating the stopcock after insertion causes the hollow pin portion to regulate the fluid flow through the plug-type coupling.

Abstract: A plug valve and fluid control method according to which a cylindrical plug is provided in a bore of a body member and has a through passage formed therein. The plug is adapted to be rotated about its axis to move the passage between an open position in which it is in alignment with passages in the body member to permit fluid flow through the body member, and a closed position in which it is out of alignment with the passages to prevent the fluid flow.

Abstract: A fluid filtering device has a housing with a mounting mechanism disposed at the forward end and on the top surface of the housing. A fluid inlet is defined through the housing top surface, and at least one fluid outlet is defined through the housing bottom surface. A valve member is disposed within the housing between the fluid inlet and the fluid outlet. At least one filter is disposed longitudinally within a portion of the housing rearward of the mounting mechanism. The filter is in fluid communication with the fluid inlet and a fluid outlet and may be removable from the rear of the housing. An actuator extends from the forward end of the housing and is connected with the valve member through the housing. The actuator moves the valve member between a filtered and unfiltered position. In the filtered position, fluid is directed from the fluid inlet and through the rear portion of the housing containing the filter.

Abstract: Disclosed is a pin valve featuring a pin that extends less than the entire length of the valve body. As a result, the valve body bore which houses the pin does not extend through the entire body. The pin is held in place through one of several retaining devices disclosed, including a compression ring. The retaining device is placed about the pin and within the valve body.

Abstract: A rotary-body type throttle valve for a spark ignition internal combustion engine is disclosed. The valve includes a valve casing, an intake passage formed with a rotary-body recess portion, a valve element having a rotary-body shape which is rotatably fitted into the rotary-body recess portion of the valve casing, and a communication passage that permits an upstream intake passage and a downstream intake passage to communicate with each other is formed in the valve element. The upstream intake passage and the downstream intake passage sandwich the rotary-body recess portion of the valve casing. A through hole which is directed from the communication passage of the valve element in a direction intersecting a central axis of the communication passage and reaches only one of rotary outer surfaces of the valve element is formed in the valve element. This arrangement results in a reduced flow resistance by decreasing the size and number of vortices generated during partially opened states of the valve element.

Abstract: The invention is directed to a plug valve comprising a body which includes an inlet port, an outlet port and a cavity that is connected between the inlet and outlet ports; first and second seal segments which are mounted in the cavity and which each comprise a through bore that is coaxial with the inlet and outlet ports; the through bores and the inlet and outlet ports defining a flow passage through the body; a plug member which is rotatably positioned between the first and second seal segments and which includes a hole that extends transversely therethrough; the plug member being rotatable between an open position in which the hole is aligned with the flow passage and a closed position in which the hole is offset from the flow passage; and at least a first booster spring which is positioned between the first seal segment and the body to bias the first seal segment against the plug member.

Abstract: When a piston unit and a valve unit employed in a recording head of an ink-jet recording apparatus were manufactured by a conventional method, comprising parts for these unit were separately formed and assembled, which required considerable man-hours for the assembly and measures to prevent contamination by foreign particles during the assembly. The present invention is carried out to solve these problems and provides units at less expensive cost. In order to attain above-mentioned objectives the units are formed out of mutually insoluble materials with other parts by an insert molding or a multi-color molding. By employing forming materials with different molding shrinkage rate, desired gas-tightness of the units are attained by keeping moving performances of the units almost intact. In addition a rubber or an elastomer is employed as a material for a part which requires a gas-tightness and flexibility.

Abstract: A hand grip structure of the pistol nozzle comprises an upper grip member, a lower grip member, a center tube, a control knob, and a protective cover. The center tube is enclosed by the upper grip member and the lower grip member and is provided with a channel, a water-admitting port and a water-discharging port. The channel is provided in the midsegment with a control cell in which the control knob is disposed such that a push button of the control knob is jutted out of the upper grip member. The control knob is provided with an arresting block. The protective cover is fastened with the lower grip member to soothe the hand. The rate of water flow in the channel is regulated by the control knob.

Abstract: A sleeve valve device for fluid flow between a hydrocarbon reservoir and a well in the hydrocarbon reservoir comprises a fixed outer sleeve (1) and an inner sleeve (2) which is rotatable in order to bring apertures (3, 4) in the outer sleeve and the inner sleeve into and out of correspondence with each other, for adjustment of the fluid flow through the apertures. The inner sleeve comprises at least one external bulb (5) with a surface (6) which, in an unassembled, unloaded condition of the outer sleeve (1) and the inner sleeve (2), is at a distance (11) from the inner sleeve's centre line (9) which is greater than the outer sleeve's internal radius (r2).

Abstract: A valve assembly including a main body defining a central axis and a gate. The gate includes a curved surface relative to the central axis and the gate is disposed within the main body. The gate is rotatable about an axis of rotation running along the length of the gate. The valve assembly also includes an actuation assembly for rotating the gate about the axis of rotation between a first position where said valve is open and a second position where said valve is closed.

Abstract: A rotary stop cock is formed so that in a first selected position it can separate a plurality of compartments, in a second selected position can allow for the flow of material from one or more upstream compartments into a downstream compartment, while also allowing air to vent from the downstream compartment through the stop cock and out to the atmosphere, and in another selected position can allow for the flow of material from what was the downstream compartment to what was the one or more upstream components without venting any of the compartments.

Abstract: The invention relates to a rotatable stopcock inserted into a male coupling (2) having a 90° offset connecting piece (3) for connecting to fluid lines. A contact hole (6) for receiving a female pin (8), which is connected to the stopcock (1) and which is provided with a continuous hole (9) having a 90° angle curve for connecting the coupling housing (5) to the connecting piece (3), is situated along the straight extension of the male coupling (2), and the end of the said female pin is connected to a turning knob (7) while forming one piece. In order to be able to securely fix the stopcock (1) to the coupling housing (5) after insertion into the contact hole (6), the housing wall (10) comprises a peripheral flange ring (11) on the contact hole (6). For the same purpose, two ring segments (13) located opposite one another are shaped onto the front wall (12) of the turning knob (7).

Abstract: There is disclosed herein a bulk container valve for use with a bulk container having a tubular spout. The valve comprises a one piece plastic housing having an interior chamber connecting a front port to a rear port. The housing includes a rear fitting about the rear port for connection to the spout, in use, and a front fitting about the front port. A one piece plastic cylindrical valve element is rotationally supported in the interior chamber of the housing for movement between a valve open position and a valve closed position. The valve element includes a handle for selective rotation of the valve element. A collar secures the valve element to the housing to maintain the valve in assembled condition.

Abstract: A stopcock controlling ducts in medical endoscopes passing flux media, comprising a housing made of a hard material and rotatably receiving a conical plug in a conical seat crossed by a duct, said housing subtending in the direction of the axis of rotation and beyond the larger opening of the conical seat a bearing collar which supports a rotary body that is rotatable about the axis of rotation, said rotary body being fitted outside said housing with a handle and being rotationally coupled with the plug and axially displaceable and being biased by a-spring relative to said plug and further being fitted with a radially elastic detent device which in the assembled state of said stopcock is configured inside the housing, said rotary body by means of said detent device acting in locking manner against the spring action on said bearing collar, characterized in that the rotary body is fitted with prefabricated rupture site which following deliberate rupture shall expose the snap-in device.

Abstract: The invention is directed to a plug valve comprising a body which includes an inlet port, an outlet port and a cavity that is connected between the inlet and outlet ports; first and second seal segments which are mounted in the cavity and which each comprise a through bore that is coaxial with the inlet and outlet ports; the through bores and the inlet and outlet ports defining a flow passage through the body; a plug member which is rotatably positioned between the first and second seal segments and which includes a hole that extends transversely therethrough; the plug member being rotatable between an open position in which the hole is aligned with the flow passage and a closed position in which the hole is offset from the flow passage; and at least a first booster spring which is positioned between the first seal segment and the body to bias the first seal segment against the plug member.

Abstract: The preferred embodiment comprising a truncated cone valve plug, or a truncated cone with curved sides as in the tractrix valve is described. A step is fabricated into the large end of the valve plug. A secondary seal, called a Veri-Seal, is placed on the large end of the valve plug on the step at an intermediate location between the outer diameter of the plug and the stem. Pressure forces acting downward on the step on the top of the valve plug balance the pressure forces acting upward in the channel through the valve plug. By placing the Veri-Seal at this intermediate location on the top of the plug, the spring force can be minimized and the resulting torque to open and close the valve is consequently reduced.

Abstract: A new, unique combination of the Tractrix Valve and the Tractrix Stem Seal is described as an improvement over the original patents issued. The plug and the stem seal are juxtaposed large end to large end. The stem seal functions as a fluid seal and as a journal bearing. The purpose of the Tractrix Valve is to prevent leaks through the seat of the valve and to the outside environment past the stem seal by use of long-term self-renewing tractrix surfaces that continue to mate after continued use.

Abstract: There is disclosed herein a bulk container valve for use with a bulk container having a tubular spout. The valve comprises a one piece plastic housing having an interior chamber connecting a front port to a rear port. The housing includes a rear fitting about the rear port for connection to the spout, in use, and a front fitting about the front port. A one piece plastic cylindrical valve element is rotationally supported in the interior chamber of the housing for movement between a valve open position and a valve closed position. The valve element includes a handle for selective rotation of the valve element. A collar secures the valve element to the housing to maintain the valve in assembled condition.

Abstract: A valve member for use in a medical manifold valve assembly, wherein the valve member comprises a valve stem having a handle formed thereon for rotating the valve stem within the bore of a manifold. The valve stem has at least one pathway therethrough that can be aligned with channels through the manifold to allow fluid to flow through the valve stem pathway. The valve stem comprises at least two grooves circumscribing the valve stem, one groove above and one groove below each pathway opening. These grooves are preferably fitted or molded with a flexible material to form seals. The diameter of the valve stem above and below the area between the grooves is less than the diameter of the valve stem between the grooves such that the valve stem wall above and below the area between the grooves does not contact the bore wall.

Abstract: An improved plug valve assembly having polymerically encapsulated seats and a machined inner surface is provided. The valve assembly comprises a valve body having an internal chamber, a plug disposed within the internal chamber and seat members supporting and sealing the plug. The seat members comprise a support frame which is completely encapsulated in a polymeric material. The process for encapsulating the seats includes providing a mold having, among other features, pins which position the support frame to provide for even application of the polymeric material to the support frame.

Abstract: An intake relief valve comprises a bronze sectional gate positioned within the valve chamber adjacent to an outlet section of the valve. A quick attachment coupler of the valve connects the outlet section typically to a pumper fire truck, and a hose from a hydrant or draft source connects to an opposite inlet section of the valve. When the valve is closed and the hose is disconnected from the valve with the valve connected to the pumper fire truck, there is no water remaining in the valve chamber. Any residual water is released by a pit drainage outlet on the bottom wall of the valve. Not having water stored in the valve eliminates corrosion problems within the valve, when the valve is connected to the pumper fire truck.

Abstract: A multi-shot, injection molded valve has at least two independent elements which are rotatably and non-detachably connected together. The valve includes a stationary housing and a pitcock rotatably mounted therein. The stationary housing is molded in a first shot with at least one inlet projecting from one side of the housing and at least one outlet projecting from another side of the housing. The housing has a substantially cylindrical upper portion defining a first bearing surface, and a substantially cylindrical lower portion defining a second bearing surface, the upper and lower portions being divided by a substantially cylindrical rib. The pitcock is molded in a second shot with an external grip portion, an upper cylindrical segment beneath the grip portion and a lower cylindrical segment separated from the upper cylindrical segment by a substantially cylindrical undercut which is engageable with the rib on the housing.

Abstract: An element for controlling the fluid flow rate through a fluid valve. The element may include a generally spherical metal housing encasing a cylindrical ceramic insert. The element may also include a cone-shaped metal housing encasing a cylindrical ceramic insert. The cylindrical ceramic insert defines a fluid passageway through the element. The element further includes a coupling mechanism disposed on the metal housing configured for securing a metal actuation shaft to the element. The coupling mechanism provides a high-strength element-to-shaft connection between the metal actuation shaft and a metal portion of the element. The present invention also encompasses a method of manufacturing the element.

Abstract: A rotary plug valve is disclosed in a preferred embodiment that has two telescoping seat assemblies that fit into respective recesses provided in the valve body surrounding a passageway through the plug valve. A valve chamber is formed in the valve body into which the rotary plug may be positioned to control flow through the valve by rotation thereof. In a preferred embodiment, the telescoping seat assemblies provide an upstream and a downstream seal with the rotary plug. The telescoping seat assemblies preferably function differently when in the open and closed position so that both assemblies expand when in the open position whereas in the closed position one assembly expands and one is compressed. A line pressure surface is provided to provide a force against the plug seal seat element. The plug seal seat element and plug mate with a curved surface and the contact stress varies depending on the location along the curved surface.

Abstract: An air intake assembly for internal combustion engines, in which a throttle valve unit is inserted into a casing molded in one piece with an air inlet leading to an air filter of the engine. The casing and the throttle valve unit have complementary tapered portions which are sealed when the throttle valve unit is inserted into the casing. An opening in the casing is surrounded by O-ring seals which seal a bore in the throttle valve unit extending to a valve secured to a rotatable shaft.

Abstract: An on/off valve for a paintball gun comprises a valve body. The valve body includes a gas inlet to receive a gas from a compressed gas source and a gas outlet to transmit the gas to the paintball gun The valve body also contains a plug cavity for receivingly engaging a plug. The plug includes a flow aperture for transmitting the gas from the inlet aperture to the outlet aperture. An actuator controls the plug position and, hence, a supply of gas through the flow aperture. An o-ring is seated within an exit port of the gas inlet in contact with the valve body and the plug. In operation, the gas has a pressure that exerts a force on the o-ring to maintain it in a sealing engagement with the plug. Movement of the actuator between an “oi” position and an “off” position opens and closes the on/off valve. In an open position, the flow aperture is positioned in communication with the inlet aperture and permits a flow of gas from the inlet aperture to the outlet aperture.

Abstract: A one-way spring tensioned flapper is located at one end of a valve housing to control the direction of flow. A rotatable plug at a second end can be partially opened to control the flow rate through the valve. A top mounted handle controls movement of the rotatable plug 90.degree. in either direction from a longitudinal line between a first and second opening to the valve. A rubber seal on each side of the flapper and the rotatable plug prevents leakage in the closed position.

Abstract: A throttle valve assembly is provided, including a throttle valve housing having a bore therethrough and a throttle valve plug assembly. The throttle valve plug assembly includes a shaft rotatably mounted on the throttle valve housing and a throttle valve plug having a concave cut-out portion. The throttle valve plug is mounted on the shaft within the throttle valve housing and substantially perpendicular to the bore. The throttle valve plug has at least two fully open positions and a closed position.

Abstract: The invention relates to a disassemblable cock with which a plug rotatable in the cock housing is releasably latched with the housing. The plug can be moved by tension or pressure from a working position into an intermediate position in which the sealing surfaces of the plug and of the cock housing are located out of bearing yet the plug remains connected to the housing (FIG. 1).

Abstract: A plug or gate valve including two seats shaped as cylindrical segments and having a first continuous seal surrounding the flow passage and at least one satellite seal outside the first seal to reduce the area upon which pressure acts to force the segment toward the plug or gate.

Abstract: A spool valve and cooperating housing with a particular shape. A portion of the housing has a relatively thin sidewall and it includes an integrally formed stub cylindrical wall portion. A cooperating cylindrical force-applying element is present which deforms the thin wall portion into snug sealing contact with the portion of the valve spool lying adjacent thereto.

Abstract: A two-way valve 10 for pipelines comprises a valve housing 12 with connection pieces 14 and a valve body 16 that is arranged in the valve housing an actuated via an adjusting lever 42. The valve body has a flow-through bore that forms a tubular flow-through channel for a fluid with the connection pieces 14 in the open position of the valve. The valve body 16 comprises a cylindrical sealing surface that forms a fluid-tight, close fit with a cylindrical inner wall of the valve housing 12.

Abstract: A composite sealing unit for sealing between moving parts in a valve is disclosed. The sealing unit has a sealing portion that interfaces with the moving parts and is adapted to isolate a reinforcing portion from media within the valve. The reinforcing portion, which can be encapsulated within the sealing unit, is operative to enhance the resiliency of the sealing unit.

Abstract: An inner periphery of a housing 1 supports a rotary shaft rotatably via a pair of bearings 3, and a valve body 5 which is secured to the rotary shaft 4 changes at least one opening area of an intake port 19 and an outlet port 14 formed in the inner periphery. A biasing member 25 biases the bearings in a one-way direction. Therefore, the valve body 5 is moved or biased by the biasing member to the inner periphery of the collar 2 via the bearings, thereby decreasing leakage in the valve when closing. Therefore, even if difference of the thermal expansion coefficient between the housing 1 and the valve body 5 is significant, the leakage can be decreased, thus increasing variety of the material choice. In addition, even if the difference of the thermal expansion coefficient between the housing 1 and the ball bearings is significant, the bearings may not become loose due to expansion of the collar 2, therefore the housing may be selected from various kinds of material including resinous material.

Abstract: A valve plug in which excess metal has been removed, leaving only the necessary surfaces for providing sealing and a flow passage. The invention abandons the truncated cone shape of the prior art for a non-conical shape; the only portions of the plug which extend toward the surface of the valve body are those necessary to provide sealing contact. The plug uses a pipe-shaped flow conduit having a cross-sectional dimension to match the size of the valve body seat around the flow ports in the valve body. The flow conduit has walls of substantially uniform thickness, such that the exterior surface of the conduit is spaced from the interior surface of the valve body, except at the ends of the conduit. In two embodiments, arcuate plates extend laterally from the sides of the flow conduit; the plates prevent the passage of fluid through the valve body when rotated into position adjacent the flow ports. A cavity is defined between the plates and the exterior surface of the flow conduit.

Abstract: A plug valve of the type including a valve disc supported by a yoke, includes adjustable members interposed between the yoke and the valve disc permitting adjustment of the valve disc relative to the yoke.

Abstract: A stopcock comprises a hollow barrel which receives in a rotatable manner a co-operating tap. A section of the tap is formed with holes which allow communication between selected hollow spigots extending from the barrel. A further section of the tap of larger diameter than the section is formed with indents which engage with detents formed on a large diameter section of the barrel to provide a positive indication when the tap is rotated within the hollow barrel to one or more selected positions.

Abstract: Coupler/diverter has housing with an aerator at the bottom and an inner barrel having rotary valving stem serving to distribute supply water, brine and overflow from RO filter. Depending on the setting, the stem permits flow through the housing to issue in the usual aerated stream. At this setting it also shuts off all other flow for decoupling. In diverting setting it sends supply to filter, shuttles return brine flush to the outside of the housing and lets reservoir overflow pass through the aerator. In a working setting the stem also can control volume of brine return to a varying degree to optimize the operation of the RO filter.