Abstract: The invention is generally a system for washing off residual resin from objects which are three-dimensionally (3D) printed through a vat polymerization (VP) process. Exemplary systems may include a solvent receptacle, a wash reservoir in fluid communication with the solvent receptacle, and a controller configured to pump a solvent from the solvent receptacle to the wash reservoir for washing off residual resin from a 3D-printed object. Exemplary methods may include pumping a first solution of a plurality of solvent solutions from the solvent receptacle to the wash reservoir, dispersing the first solution onto the 3D-printed object, pumping the first solution from the wash reservoir to the solvent receptacle, pumping a second solution of the plurality of solvent solutions from the solvent receptacle to the wash reservoir, and dispersing the second solution onto the 3D-printed object.

Abstract: A rotary nozzle sprinkler includes a base assembly with a bearing, a stem mounted rotatably in the bearing, and an elbow coupled at a proximal end to and rotatable with the stem and including an elbow bend. A nozzle is secured to a distal end of the elbow, and a diffuser assembly including a brake mechanism is cooperable with the elbow. By positioning the nozzle downstream of the elbow, the sprinkler can achieve a greater throw radius.

Abstract: A swivel connector includes a rotor that is rotatably coupled with a housing stem. In some embodiments a bearing cup is rotatably coupled at one end with an exterior surface of the rotor and anchored at an opposite end with the housing stem. An O-ring seal is positioned between the housing stem and the exterior surface of the rotor. In other embodiments, the bearing cup is rotatably coupled at one end with an exterior surface of the housing stem and anchored at an opposite end with the rotor. In such embodiments an O-ring seal is positioned between the rotor and the exterior surface of the housing stem. A bearing assembly residing within a raceway that is defined by flat surfaces on each of: the rotor, the housing stem, and an interior bearing wall within the bearing cup.

Abstract: A sprinkler head includes a first housing carrying a center stem having an inlet at an upstream end and an outlet at a downstream end. A second housing is supported within the first housing and encloses a nozzle and a pressure regulator in axially-aligned relationship, defining a flowpath between the inlet and an orifice of the nozzle. The second housing is normally biased to a retracted position but is moveable to an extended position relative to the first housing and to the center stem. A surface of the pressure regulator cooperates with the outlet of the center stem as the second housing moves relative to the first housing to regulate pressure to the nozzle orifice.

Abstract: A water sprinkler includes a base, a timer mechanism having a timer inlet and a timer outlet, the timer mechanism being configured to operate in (i) a first mode in which fluid is allowed to pass between the timer inlet and the timer outlet, and (ii) a second mode in which fluid is prevented from passing between the timer inlet and the timer outlet, a motor having a motor inlet, a motor outlet, and a drive member, the motor configured to move the drive member in response to fluid passing from the motor inlet to the motor outlet, and a spray member coupled to the motor outlet, the spray member configured to move in response to movement of the drive member, wherein the base includes a first base retention structure and a second base retention structure.

Abstract: A fog or mist generating nozzle assembly produces a swirling fog pattern having a forward thrust component that permits an operator, stationed safely at a remote location relative to a fire source, to exercise directional control and positioning of a relatively large mist cloud on or about the fire source. The discharge nozzle includes a cylindrical bearing member and a cylindrical rotor member with multiple water discharge orifices that extend at a forward projection angle ? relative to the nozzle axis. A pair of fog producing nozzles are configured with counter-rotating rotors, producing counter-rotating clouds that merge along a common vortex. This generates a composite mist cloud having a magnified forward thrust component, enabling remote directional control of the mist cloud.

Abstract: A torch (1) for thermal spraying of surface coatings, of the type that comprises a head (3) and a bracket (2) for the head (3), in which the head (3) pivots relative to the bracket (2). The invention also relates to the coatings obtained using the torch, whether of polymer, metal or ceramic materials, on any substrate coated thereby, whether of polymer, metal or ceramic or composite materials. The invention is applicable to different types of thermal spray torches, using plasma spray, combustion spray, High Velocity Oxygen Fuel (HVOF), or Low Velocity processes.

Abstract: A wash arm retainer for a warewasher having at least one wash arm with a plurality of nozzles and being in fluid communication with an adapter for receiving a flow of fluid, includes a housing defining a through bore and having a first end and a second end, a cam surface formed in the housing and having a clamping position and a release position, and a cap rod slidably disposed in the through bore and provided with an actuator handle projecting from the rod and constructed and arranged for following the cam surface.

Abstract: A rotating spray nozzle, comprising an elongate stem securable to a liquid-supply pipe, the stem defining a passageway therethrough for communicating a liquid from the supply pipe, the passageway communicating at least one inlet opening and at least one outlet opening defined in the stem; and a polymer nozzle body freely rotatably mounted on the stem for rotation about a nozzle axis, the nozzle body having an internal cavity in communication with the at least one outlet opening of the stem, and at least one nozzle defined through the nozzle body and communicating with the internal cavity, the at least one nozzle being offset from the nozzle axis to impart a driving couple to the nozzle body to cause rotation thereof when a liquid from the supply pipe is communicated through the at least one nozzle. The stem defines a longitudinal portion bounded at opposite ends thereof by integral annular shoulders having diameters greater than the longitudinal portion.

Abstract: The invention relates to a spray arm bearing (1) with a bearing element (2), for mounting a spray arm (20) and a flow-guide device (3), connected to the bearing element (2), whereby the bearing element (2) comprises a through opening for the passage of fluid. According to the invention, the base area (D2) of the flow-guide device (3) corresponds to the base area (D1) of the through opening or lies within the base area (D1) of the through opening.

Abstract: A rotating spray nozzle, comprising an elongate stem securable to a liquid-supply pipe, the stem defining a passageway therethrough for communicating a liquid from the supply pipe, the passageway communicating at least one inlet opening and at least one outlet opening defined in the stem; and a polymer nozzle body freely rotatably mounted on the stem for rotation about a nozzle axis, the nozzle body having an internal cavity in communication with the at least one outlet opening of the stem, and at least one nozzle defined through the nozzle body and communicating with the internal cavity, the at least one nozzle being offset from the nozzle axis to impart a driving couple to the nozzle body to cause rotation thereof when a liquid from the supply pipe is communicated through the at least one nozzle. The stem defines a longitudinal portion bounded at opposite ends thereof by integral annular shoulders having diameters greater than the longitudinal portion.

Abstract: A water distribution plate and diffuser plate assembly for distributing a stream emitted from a sprinkler nozzle includes: a nonrotatable shaft having one end attached to a sprinkler component and an opposite end supporting first and second plates in axially spaced relationship for rotation about the shaft independent of one another. The first plate is axially adjacent the nozzle and formed with plural water distribution grooves shaped and arranged to divide a single primary stream emitted from the nozzle into a plurality of secondary streams. The second plate is downstream of the first plate and formed with plural diffuser elements arranged to be struck by at least some of the secondary streams exiting the first plate. The speed of rotation of one or both plates is slowed by viscous damping.

Abstract: A spreading device (10) includes an injector (14) and a spreading tube (16) connected with the injector. The injector contains therein a viscous thermal medium material for being spread on a surface of a cooling device for electronic components. The spreading tube defines therein at least one outlet hole (164) for release of the thermal medium material contained in the injector. The spreading device further includes means formed on the spreading tube for evenly distributing the material released through the outlet hole of the spreading tube over an entire area of the surface to be applied with the thermal medium material.

Abstract: The invention relates to a spray arm bearing (1) with a bearing element (2), for mounting a spray arm (20) and a flow-guide device (3), connected to the bearing element (2), whereby the bearing element (2) comprises a through opening for the passage of fluid. According to the invention, the base area (D2) of the flow-guide device (3) corresponds to the base area (D1) of the through opening or lies within the base area (D1) of the through opening.

Abstract: An engine and high pressure pump are mounted onto a wheeled chassis. High pressure water is distributed to a rotating wand and nozzle assembly on the wheeled chassis so that as the chassis is moved along a linear path, high pressure water is sprayed onto an underlying surface to clean the surface. Optional diffusion plates may be used to prevent high pressure water from being sprayed directly onto the underlying surface in part of the rotational path defined by the wand and nozzle assembly.

Abstract: The present invention provides an improved water flow switching mechanism of a gear-type sprinkler, which addresses problems of typical gear-type sprinklers, such as invalid water switching and poor stability. The gear-type sprinkler includes a water inlet portion, a water outlet portion and accommodating space. A convex framework is additionally placed onto the accommodating space opposite the separate water outlets. Two lateral grooves are defined in the convex framework, each corresponding to a water outlet. So the pivotal portion of the rotary switching seat is assembled centrally into the convex framework. The rotary switching seat is provided with two opposite extension flanges. The extension flange may block the lateral groove of the convex framework in line with the swinging direction of the rotary switching seat. The water-stop area of rotary switching seat is greatly increased, thus ensuring the stability of the water flow switching state and improving performance of the sprinkler.

Abstract: An engine and high pressure pump are mounted onto a wheeled chassis. High pressure water is distributed to a rotating wand and nozzle assembly on the wheeled chassis so that as the chassis is moved along a linear path, high pressure water is sprayed onto an underlying surface to clean the surface. Optional diffusion plates may be used to prevent high pressure water from being sprayed directly onto the underlying surface in part of the rotational path defined by the wand and nozzle assembly.

Abstract: A wash arm retainer for a warewasher having at least one wash arm with a plurality of nozzles and being in fluid communication with an adapter for receiving a flow of fluid, includes a housing defining a through bore and having a first end and a second end, a cam surface formed in the housing and having a clamping position and a release position, and a cap rod slidably disposed in the through bore and provided with an actuator handle projecting from the rod and constructed and arranged for following the cam surface.

Abstract: An improved seal for use in fluid systems such as a water jet system includes an outer seal point that is very close to an inner seal point. By spacing these two seal points very close together, the force on the seal is greatly reduced compared to the prior art. In the disclosed embodiment, the outer seal point is on an angled forward face of the seal that abuts a back-up ring angled face. The inner seal point is between the seal and an internal shaft which rotates relative to a housing.

Abstract: An engine and high pressure pump are mounted onto a wheeled chassis. High pressure water is distributed to a rotating wand and nozzle assembly on the wheeled chassis so that as the chassis is moved along a linear path, high pressure water is sprayed onto an underlying surface to clean the surface. Optional diffusion plates may be used to prevent high pressure water from being sprayed directly onto the underlying surface in part of the rotational path defined by the wand and nozzle assembly.

Abstract: The water misting system includes a stationary member 3, 4 having a flow path therein for transmitting water, the rotary swivel 5 in fluid communication with the stationary member, and one or more conduits 6, 7 in communication with the stationary member and extending radially outward from the swivel. A misting nozzle 8, 9 is provided at an outer end of each respective conduit, and has a central nozzle axis angled with respect to a central axis of a respective conduit for discharging mist while producing a tangential thrust for rotating the one or more conduits and the misting nozzle about the stationary member. According to the method of the invention, angling of the central nozzle axis of each misting nozzle with respect to a central axis of the respective conduit produces the tangential thrust to rotate the conduits and thereby mist a large area.

Abstract: A nozzle for use in cleaning applications is provided. The nozzle has a rotatably supported nozzle body, on which one or more nozzle orifices are provided. The nozzle housing itself serves as the rotary drive, which is carried along by a fluid led into the housing with torque. In order to stabilize the drive action, at least one braking device is provided on the nozzle which generates a braking torque by fluid action, preferably through the recoil on a nozzle opening.

Abstract: A spraying head assembly for a massaging tub includes a housing, a cover, a water outlet valve seat, a water outlet valve cover, a vortex rotor, a bushing, a nozzle, an impulse rotor, and a motor. Thus, the water is pressurized by rotation of the helical blades of the vortex rotor and the helical plates of the water outlet valve seat to produce a strong water beam that is injected outward from the nozzle, thereby enhancing the massaging effect.

Abstract: A rotating spa jet has a body and a nozzle. The body has an upstream end, a downstream end and a flow path defined between the upstream end and the downstream end. The nozzle is disposed within the flow path proximate to the downstream end of the body. The nozzle is rotatable about a pin and is not supported in any way by ball bearings.

Abstract: A gearbox for a drive line irrigation system in which the input and output shafts of the gearbox are sealed with a compressed and sintered silicon and carbide face seal. The face seal is contained within the gearbox and compressed between a gearbox end cap and a shaft bearing, obviating the need for external loading by bellows or similar spring elements.

Abstract: A needle foot assembly for a dispensing system includes a needle nut, a rotatable bearing, a friction brake, and an end piece holding the needle foot. The needle foot assembly attaches the needle to a dispensing head of the dispensing system. Rotation of the bearing alters the orientation of the needle foot and needle. The needle foot is removeably attached to the end piece and can be adjusted with respect to height.

Abstract: A gun mount for a spray gun includes a rigid bracket that is installed on a rigid vertical support such as a gun mover. The bracket securely mounts the guns so as to reduce vibration and swaying during a spraying operation, even when the guns are being vertically moved by an oscillator. A position label or other suitable indicia is provided on the bracket so that the gun mount position can be recorded and thereby accurately repeated during subsequent installations. The bracket in one embodiment includes a series of vertical and horizontal mounting holes that permit a gun body to be installed at a desired vertical and horizontal orientation. A gun blow off arrangement is also provided for mounting associated pairs of air nozzles in position to blow powder from gun exterior surfaces. The associated pairs of air nozzles are mounted on a common bracket that can be selectively and slideably positioned on a channel support.

Abstract: A pivot flow joint for high-pressure fluid-flow devices of the type including a rotating flow member connected to a non-rotating flow member. The pivot flow joint includes first and second axially-aligned seal bushings secured to the non-rotating and rotating flow members, respectively, the first and second seal bushings having opposed adjoining contact surfaces. The seal bushings are biased toward one another for sealing engagement at such contact surfaces. Certain preferred embodiments involve spring-biasing the seal bushings toward one another and/or use of the high-pressure fluid to exert axial pressure for that purpose. The two seal bushings, which are preferably ceramic and of identical size and shape, carry out the sealing function of the pivot flow joint in the transition between the non-rotating and the rotating members of such joint.

Abstract: A spa jet for delivering water from an upstream source of water under pressure to the interior of a spa, the spa jet having a housing with an inlet tube communicating with the source of water and a chamber wall defining a generally cup shaped chamber. A retaining ring is connected to and inside of the chamber wall. A form having an annular upstream portion is fixed against axial movement between the chamber wall the retaining ring. The form has a downstream portion extending from the annular portion in the form of a shaft aligned with the axis. The spa jet also has a rotor with a generally cylindrical body concentric with the axis, the body having a bearing surface extending around the shaft which supports the body for rotating. At least one nozzle passage extends through the rotor which collects water from the inlet tube and directs the water as a water jet into the spa at an angle sufficient to impart a turning moment to the rotor about the axis.

Abstract: A mid-level spray-arm assembly for a dishwasher includes a bracket for mounting a spray-arm hub to an upper rack of the machine, and a bearing coupling extending between the hub and the bracket. The bearing coupling forms a first bearing surface for rotation of the bearing coupling relative to the bracket, and a second bearing surface for rotation of the spray-arm relative to the bearing coupling. Thus, redundant bearing surfaces are provided that facilitate a more even wearing of the bearing surfaces and allow rotation of the spray-arm even when one of the bearing surfaces fails.

Abstract: A mechanism that steers a high energy density output(s) in a shaking motion other than a rotating motion that when translated across a surface evenly affects the surface. One application can be used as an end effector. A pivot on the mechanism induces an angular motion that eliminates the tops and bottoms of the pattern produced by the shaking motion. As a waterjet stripping mechanism which may be an end effector, a nozzle or output manifold with one or more orifices or outputs is attached to a non-rotating tube eccentrically mounted within a rotating tube that shakes the nozzle or output manifold so as to direct the stream of water to the target in a skewed circular pattern.

Abstract: A dishwasher spray arm hub assembly includes a hub having a first central bore extending therethrough and a conduit feed extending therefrom. The conduit feed is in flow communication with the central bore and a venturi insert is disposed in the hub central bore. The venturi insert also includes a second central bore extending therethrough. The first bore and the second bore together form a fluid bypass channel in flow communication with the conduit feed. Therefore, a lower spray arm assembly and a spray arm conduit for upper spray arm assemblies may be simultaneously fed through the hub assembly.

Abstract: A cleaning device for a jet pump nozzle in a nuclear reactor. The cleaning device includes a tubing section having a first end, a second end and a mid-section between the first end and the second end, a pole adapter coupled to the tubing section at the mid-section, and a hydrolaze head assembly coupled to the first end.

Abstract: A rotating bearing assembly for a sprinkler coupled to a pipe segment is disclosed. The bearing assembly has a stem which permits fluid flow. The stem has a bottom open end with a collar and a top open end which is connected to a cap. The cap allows connection to a sprinkler head which rotates from water pressure through the pipe segment. The stem conduit rotates in relation to a sleeve which is frictionally fitted within the pipe segment. A plurality of washers is located between the collar and the bottom of the sleeve to provide a water seal under high pressure conditions. Another group of washers is located between the top of the sleeve and the cap to provide additional sealing under low pressure conditions.

Abstract: A wind-driven decorative feature mounted inside the rotating head of an upright, standpipe-type sprinkler. The wind-driven device is mounted inside the sprinkler head for rotation independent of the rotation of the spray tubing portion of the sprinkler head, and is generally located in the region bounded by the rotation of the sprinkler head itself and the spray pattern emitted by the sprinkler head.

Abstract: The device relates to a method for the cleaning of animal stalls, which have a number of spaces that are to be cleaned by means of an automatic clean device. The method is characterized by the steps of (a) positioning the device in a parking position, in which the device can reach into and clean a first space, (b) cleaning of the first space through manual controlling of the device, (c) the repetition of steps (a) and (b) until all the spaces in the premises which are to be cleaned have been cleaned by the device, programming the device with the movements which were performed during the above-mentioned steps, by means of signals representing these movements which are supplied to a control unit, through registering the movements performed by storage of the steps in a memory which is provided in a control unit which is part of the device, and the use of the contents of the memory during the next cleaning of the same animal stall as a program for the control unit for the automatic controlling of the device.

Abstract: A spa jet for delivering water from an upstream source of water under pressure to the interior of a spa, the spa jet having a housing with an inlet tube communicating with the source of water and a chamber wall defining a generally cup shaped chamber. A retaining ring is connected to and inside of the chamber wall. A form having an annular upstream portion is fixed against axial movement between the chamber wall the retaining ring. The form has a downstream portion extending from the annular portion in the form of a shaft aligned with the axis. The spa jet also has a rotor with a generally cylindrical body concentric with the axis, the body having a bearing surface extending around the shaft which supports the body for rotating. At least one nozzle passage extends through the rotor which collects water from the inlet tube and directs the water as a water jet into the spa at an angle sufficient to impart a turning moment to the rotor about the axis.

Abstract: A sprayer. An annular tube is installed at a water outlet of a water main tube. The annular tube is installed with spraying holes. The annular tube is formed with at least one annular tube. The surface of the annular tube is installed with spraying holes. In one embodiment, a first annular tube rotates around the water main tube. Another annular tube rotates around the first annular tube so that water beams from the spraying holes to present a changeable three dimensional effect.

Abstract: A nozzle body and assembly for delivering atomized fuel to a combustion chamber. The nozzle body is rotatably mounted onto a substrate. One or more curvilinear fuel delivery channels are in flow communication with an internal fuel distribution cavity formed in the nozzle body. Passage of pressurized fuel through the nozzle body causes the nozzle body to rotate. Components of the nozzle assembly are formed of silicon carbide having surfaces etched by deep reactive ion etching utilizing MEMS technology. A fuel premix chamber is carried on the substrate in flow communication with a supply passage in the nozzle body.

Abstract: A hydrodynamic stirring device which dissolves, mixes or puts back into suspension or into a “sol” in a primary liquid phase, a deposited sediment which is contained in a tank and covered by the primary liquid phase. The stirring device includes a suction device, including at least one pumps to remove liquid from the primary liquid phase in the tank, and an injector connected to a discharge side of the suction device. The injector is equipped for reinjecting the liquid into the tank, towards the deposited sediment, in the form of at least one jet having a predefined pressure and flow rate. The injector further includes at least one tube which bears at an end portion thereof, a self-rotating lance. The lance a hollow cylindrical stator which is open at both of its end portions. At a first of its end portions to the injector tube. At a second of its end portions, the stator is connected to a nozzle bearing rotor which is rotatably mounted on the stator.

Abstract: An adapter for rotatably connecting a sprinkler head to a water-transporting standpipe having a cylindrical upper end. The adapter includes three parts: a cup-like base adapted to rest on the upper end of the standpipe in sealed fashion, a male stem adapted to rotatably and scalingly seat in the cup-like base, and an oversleeve adapted to fit over the stem and the base and to be locked to the upper end of the standpipe by threaded connection such that a portion of the male stem protrudes from the oversleeve to be secured to the sprinkler head for rotation therewith. The adapter is sealed at several points internally to positively prevent water leaks, and is easily disassembled for replacement, repair, or cleaning, by hand or with simple hand tools, since no permanent connection is required between the adapter, the standpipe, and the sprinkler head.

Abstract: A swivel lawn sprinkler includes a mounting rack for mounting, a water tube vertically connected to the mounting rack by a hose connector and adapted to receive water from a water source through the hose connector, a pipe connector fastened to the top end of the water tube, the pipe connector having a collar of oval profile disposed around the periphery thereof, and a swivel sprinkler head coupled to the pipe connector and forced to rotate on the pipe connector upon passing of water from the water tube, the swivel sprinkler head having a figured frame, and two wings coupled to figured frame and forced by the periphery of the collar of oval profile to move up and down upon rotary motion of the swivel sprinkler head on the pipe connector.

Abstract: A swivel lawn sprinkler includes a mounting rack for mounting, a water tube vertically connected to the mounting rack by a hose connector and adapted to receive water from a water source through the hose connector, a pipe connector fastened to the top end of the water tube, the pipe connector, a swivel sprinkler head coupled to the pipe connector and forced to rotate on the pipe connector by water pressure when sprinkling, and a slide coupled to swivel sprinkler head and forced to move two ornaments alternatively up and down and to oscillate symmetrical pairs of wings up and down upon rotary motion of the spray tube.

Abstract: A nozzle for use in cleaning applications is provided. The nozzle has a rotatably supported nozzle body, on which one or more nozzle orifices are provided. The nozzle housing itself serves as the rotary drive, which is carried along by a fluid led into the housing with torque. In order to stabilize the drive action, at least one braking device is provided on the nozzle which generates a braking torque by fluid action, preferably through the recoil on a nozzle opening.

Abstract: A lawn sprinkler and bearing therefore is provided. The lawn sprinkler has first and second rotatable sprinkler elements supported on a support stand. The bearing allows the sprinkler elements to rotate in opposite directions to evenly distribute fluid over an area to be irrigated.

Abstract: A counter-rotating sewer cleaning nozzle to provide improved efficient cleaning of interior surfaces of sewer lines. The counter-rotating sewer cleaning nozzle is comprised of a hose connector on one end and nose cone on the opposite end and retaining between them counter-rotating sleeves fitting over a cylindrical conduit. Each of the sleeves has spray jets in communication with a passageway connecting the cylindrical conduit to the hose connector for receiving water at high pressure from a high-pressure hose or pipe. The jets in the counter-rotating sleeves are at an oblique angle to the radius of the sleeves and the cylindrical conduit. The spray jets are angled in opposite directions in the forward and rear rotatable sleeves to provide counter rotation.

Abstract: A batch type dish washing machine having spray assemblies supported for rotation on special bearings. Each spray assembly has a spray base through which a pedestal extends to provide a rotational axis. A rotary hub has a bearing compartment which houses a bearing having opposing races and balls located in an annular track between the races. The bearing races are captured between a pair of collars secured to the pedestal by a thumb screw. Water is applied to the dishware by spray arms which extend radially from the hub.

Abstract: The invention provides a connector for a rotatable lawn sprinkler mounted on a cylindrical stand pipe, and comprises two cylindrical members arranged co-axially with respect to the longitudinal axis of the stand pipe. A cylindrical sleeve, as the female member of the connector, has an open-ended longitudinal bore and terminates at one end with an outwardly extending annular shoulder seated on the marginal wall of the stand pipe and is secured thereto. A cylindrical stem, as the male member of the connector, having an open-ended longitudinal bore and terminates near one end with an outwardly extending annular collar is co-axially disposed and slidably engagable with the sleeve so as to be freely rotatable in the bore of the sleeve. The annular collar of the stem is supportably engaged with the annular shoulder of the sleeve. The upper section of the stem is adaptable for secure engagement with the rotatable lawn sprinkler.

Abstract: A discharge jet assembly for spas including a rear wall fitting, an orifice cap closing the rear wall fitting, and a jet body rotatably mounted within the wall fitting. The rear wall fitting includes a cylindrical central cavity and a vertically disposed air orifice opening into the central cavity. A rear portion of the jet body defines a cylindrical mixing chamber fed by a horizontal cylindrical water inlet and by an air inlet channel formed in the outer circumference of the jet body. The air inlet channel is positioned so as to rotate into and out of communication with the air orifice of the rear wall fitting. The jet body further includes structure for interacting with a stop on the orifice cap so as to appropriately limit rotation of the jet body air inlet channel with respect to the air orifice. An arced continuous seal containment groove and integrally mounted seal surrounds the air inlet channel so as to provide an airtight seal between the rear wall fitting and the jet body.

Abstract: A spray-arm assembly comprises a convergent base section having a bell mouth, a throat section, and a cylindrical housing that extends axially along the periphery of the throat section, a lower cylindrical conduit section and an upper cylindrical conduit section, and a divergent diffuser section having an entry area and an exit area. In one embodiment of the instant invention, a drainage groove is disposed within the diffuser section in order to facilitate the drainage of excess water from the spray-arm assembly once a washing or rinsing phase of operation is completed. In another embodiment of the instant invention, at least one drainage notch is formed at the mouth of the divergent diffuser section in order to create a drainage passage between the divergent section and the convergent base section.