Abstract: Side extension members and a front extension member, which extend inwardly horizontally to be bent downward at right angle are provided on side walls and a front wall in a washing tank to be positioned at a level lower by a predetermined distance than a top end of the washing tank. A rack rail is pivotally supported on the side extension members through shaft portions to be made turnable. The rack rail is formed with positioning portions. Restriction members are provided on the front extension member to extend inward corresponding to the positioning portions of the rack rail, and the positioning portions are adapted to be placed on the restriction members.

Abstract: A rotary nozzle device is described. The device includes plural rotatable hollow links which are mutually passable through, a pump for feeding a pressurized fluid into the hollow links, and at least one fluid injection port in at least one hollow link of the nozzle. Moreover, the fluid is injected from the injection port while the hollow link is rotated by the force of the fluid pressurized by the pump, and the motion of the injection port is set in chaotic state by adjusting a structural characteristic of the nozzle.

Abstract: A spinning wash nozzle assembly having a fluid brake pump within the rotating spinner housing. The fluid pump has a sump which is also within the rotating spinner housing such that centrifical forces acting on the fluid tend to separate the heavier fluid from any air within the sump. As a result, only the fluid is drawn into the pump as opposed to fluid and air. This avoids undesirable effects on the pump from air being drawn therein.

Abstract: A parts washer is disclosed. The parts washer includes a housing that has a washbasin defining an inner cavity and chargeable with a volume of fluid. A spray tube is rotatably positioned within the housing and has an axis of rotation. The spray tube is configured to define a volume of rotation as it rotates about its axis of rotation. A support structure configured to support parts to be washed is positioned within the housing and is substantially within the volume of rotation of the spray tube. The parts washer further includes a pump connected to the spray tube. The pump delivers fluid under pressure to the spray tube. The spray tube includes a plurality of outlets configured to direct fluid towards parts to be washed on the support structure and at least one outlet configured to direct fluid in a direction to cause fluid-propelled rotation of the spray tube about its axis of rotation.

Abstract: A nozzle that extends telescopically upward is used to elevate a wafer without contacting the wafer. The nozzle includes a stationary hollow cylinder, closed at its lower end and open at its upper end, within which a spool is disposed to slide vertically. In its lowest position the spool is spaced from the closed bottom of the cylinder, and purified water is supplied under pressure to the space. A passage extends vertically through the spool, and the water is discharged at the upper end of the spool from the passage. As a wafer is lowered toward the upper end of the spool, the wafer partially impedes the discharge, increasing the pressure in the space below the spool. The increased pressure drives the spool and the wafer upward, but the wafer never comes into contact with the wafer because the discharge of water creates a protective cushion between them.

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: A spraying nozzle assembly for a dishwasher which can widely spray a washing liquid toward utensils. The spraying nozzle assembly has an adapter fixedly connected to a washing liquid outlet of a pump, a rotary spray arm which is rotatably coupled to an upper portion of the adapter and receives a washing liquid from the pump through the adapter, a spraying nozzle for spraying the washing liquid introduced into the rotary spray arm toward utensils, and a spring assembly which is coupled to the spraying nozzle and allows the spraying nozzle to be moved in such a manner that the direction of the washing liquid being sprayed therefrom is varied. The spring assembly is coupled to a fixing shaft which is eccentrically disposed with respect to a rotating axis of the rotary spraying arm. The spraying nozzle assembly can spread the spraying range of the washing liquid being sprayed, so the utensils can be effectively washed and wasting of the washing liquid can be reduced.

Abstract: A water spray apparatus for a tableware washing machine is provided. The water spray apparatus sprays water to tableware in a tableware washing machine in which a washing space is formed for washing the contained tableware with the sprayed water. The water spray apparatus includes a water spray having a plurality of nozzles, for spraying water while rotating and moving in such a non-circular pattern that a rotational radius varies along the inner walls of the tableware washing machine body enclosing the washing space. The water spray apparatus can spray water to the corners which are dead zones when the rotary spray rotates and sprays water in the washing space. Thus, a washing effect of the tableware washing machine is enhanced and utility of the washing space is increased.

Abstract: A dishwasher construction having a molded one piece tub with integrally molded reinforcing ribs on an outside surface of the tub, the reinforcing ribs being hollow members formed by gas injection molding. At least one of the reinforcing ribs can be fashioned as a hollow conduit for transferring water from a bottom mounted pump to a top mounted wash arm of the dishwasher, or from a drain pump to a drain outlet. By using hollow reinforcing members molded integrally with the tub, an external upper wash arm conduit is avoided which can have external leakage, and an internal upper wash arm conduit is avoided which tends to restrict the working space within the dishwasher and can trap food and be otherwise functional and unappealing to the consumer.

Abstract: A front-loading dishwasher includes at least one basket movable out of the machine toward the front. At least one spray arm is rotatably disposed below the basket, has spray nozzles aimed at the basket and is supported on a fluid supply line that extends from one wall of the machine and is connected to a recirculating pump. A portion of the fluid supply line protruding approximately horizontally into a tub in the region of the bottom of the basket ends in a 90.degree. elbow with an outlet stub pointing downward. The spray arm rests with two wall portions located at different horizontal levels on bearing points of the elbow, which creates a simple spray arm support, in which bearing friction is substantially avoided.

Abstract: An equipment for cleaning, etching and drying a semiconductor wafer is provided with a process chamber having a closed space of which temperature is capable of being heated and adjusted by a heater; a mesh arranged at the center part in the process chamber and supporting at least one semiconductor wafer to be cleaned; a plurality of spray nozzles arranged in line at the upper part in the process chamber; and a rotary discharge nozzle arranged at the lower part in the process chamber. The spray nozzles spray chemical and ultrapure water with nitrogen gas in mist state, and the rotary discharge nozzle blows out chemical and ultrapure water as jet stream by rotation of a first arm and second arms thereof.

Abstract: A bottle washing apparatus for effectively washing the inside of bottles that are coated with solid particulate residue. The apparatus includes a fixed portion that connects to a conventional faucet and an elongated closed ended hollow shaft that is provided with a plurality of small orifices. A second closed ended hollow shaft concentrically overlies the first shaft and is rotationally affixed thereto. The second shaft is provided with a plurality of smaller orifices that are tangential with the circumference of the shaft so that when water pressure is applied to the fixed portion, water passes through the orifices in the first shaft and then through the tangential orifices of the second shaft causing the second shaft to rotate at a high rate of speed while discharging the water in needle-like streams under high pressure.

Abstract: Disclosed is an apparatus for dispersing a washing water of a dishwasher comprising a dispersing nozzle arm rotatably connected to a pump which supplies the washing water, nozzle bodies rotating the dispersing nozzle arm and sliding along an outer circumference surface of the dispersing nozzle arm, and a guiding part which is installed on a bottom wall of the dishwasher, for sliding the nozzle bodies along the outer surface of the spraying nozzle arm. The dispersing nozzle arm is rotated by ejecting forces of washing water which is ejected from the nozzle bodies. The nozzle bodies move along a guide rail while sliding along the outer circumference surface of the spraying nozzle arm. Since the nozzle bodies slide on the outer surface of the spraying nozzle arm and evenly disperse the washing water to corners of a washing tank, and the dishwasher can effectively wash dishes, thereby preventing the waste of the washing water.

Abstract: A dishwasher having spray arm, motor and pump components configured and mounted so as to occupy very low height. In one form the complete wash system is arranged as a drawer which slides in and out of a cabinet. The cabinet opening is stiffened against racking forces by incorporating an inverse portal frame in the opening flange. A synchronous AC motor is used with the rotor running within the wash chamber driving a wash pump integrated with a rotating spray arm.

Abstract: A dishwasher includes a tub, lower and upper racks removably mounted within the tub, a first-level spray arm mounted in the tub above below the lower rack, a second-level spray arm mounted in the tub between the lower and upper racks and having an upwardly extending funnel, and a nozzle assembly mounted at the top of the tub above the upper rack. The nozzle assembly includes a downwardly directed spray nozzle axially aligned with the funnel, a third-level spray arm which encircles and rotates about the nozzle, and a retainer which is secured to the nozzle below the third-level spray arm and supports the third-level spray arm. The nozzle has a main body forming a central passage and a mounting flange integral with an upper end of the main body and forming transfer openings about the central passage.

Abstract: A soil separator and water distributor for a dishwasher having an annular screen facing into the dish compartment for screening wash water, and a rotating flush arm above the annular screen for flushing soil from an underside of the screen, and a separate wash water arm above the flush arm for spraying the dishes. The wash water arm can thus be flow separated from the flush water arm. Thus, the wash water arm can be operated intermittently while the flush water arm can be operated continuously.

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.

Abstract: A dish washing machine having upper and lower spray assemblies with separate spray arms and separate water supplies for washing and rinsing dishware. A spray base for each spray assembly segregates recycled wash water from clean incoming rinse water. A hollow drum mounted to each manifold has side discharge openings. A ball bearing assembly mounts the wash spray arms for rotation about the drums. A conduit for the rinse water extends through each drum and connects with a spindle on which the rinse spray arms are mounted for rotation. The upper and lower spray arm assemblies are interchangeable. The bearing assembly is uniquely constructed such that it is automatically flushed with clean rinse water during each cycle of operation.

Abstract: A dishwasher has a spray agitator (1) rotating about an axis (2) and fed with water under pressure so as to emit several water jets. A rotating pressure jet (10) periodically reverses the direction of rotation of the agitator (1). The dishes are washed efficiently even if a mechanical obstruction interferes with the agitator (1).

Abstract: The invention relates to a device for sealing the transitional region between a rotatably mounted spraying arm of a dishwashing machine and its stationary bearing member by means of a sealing element, which is disposed therebetween and is impinged by the rinsing water flowing therethrough. The sealing and sliding friction functions are separated through the inclusion of a slip ring in the transitional region and this achieves significant sealing with a long service life.

Abstract: A one-piece wash arm is provided for a dishwasher. The wash arm has an open channel through which water from a water supply hose is directed. The channel has opposite curved ends with discharge openings through which the water is sprayed onto objects to be washed in the dishwasher. The flow of water through the channel and the curved ends imparts rotation to the wash arm. In a preferred embodiment, the open channel is downwardly facing, and the water is substantially maintained in the channel due to the water pressure, velocity and surface tension. In an alternative embodiment, the open channel is directed upwardly.

Abstract: A dishwasher with a spray agitator (1) rotating about an axis (2) in alternating opposite directions due to the effect of two nozzles with opposite thrusts (6,7). The nozzles are alternately fed with water under pressure by means of a rotating shutter (13). The shutter is made to rotate by reduction gears (12,14) and a rotor (11) activated by a nozzle (8) provided inside the agitator (1). The dishes are washed efficiently even if a mechanical obstruction interferes with the agitator.

Abstract: Apparatus for washing objects. The apparatus comprises a frame supporting a housing dimensioned to receive various, irregularly shaped objects. A conveyor belt having exterior sections that extend beyond the housing entrance and exit, conveys objects through the housing as a first series of nozzles spray the objects with a cleaning solution, Then, the objects are washed by a pair of high speed rotating sprayer arms, mounted on the exterior sides of the housing, which direct pressurized water through circular cut out portions formed in the sides of the housing to the objects being conveyed through the housing. The objects are then rinsed by a second series of nozzles and subsequently exit the housing. The exterior sections of the conveyor belt are rotatable and are rotated toward the housing to form a compact configuration for transportation and storage.

Abstract: A food soil handing system for a dishwasher is provided. A main carrier arm has two driver arms rotatably mounted thereon. Each driver arm turns a driver gear engaged with a stationary ring gear. Rotation of the driver arms results in rotation of the main carrier arm, providing significant torque. The main carrier arm is disposed above a drain plate having perforations to drain wash water. A pair of resilient wipers are secured to the main carrier arm to wipe across the plate as the carrier arm rotates. The wipers mash soft food particles through the perforations. Hard items are either swept around or passed over by the wipers for later retrieval.

Abstract: The present invention provides a wash arm assembly for a dishwasher which includes a molded plastic wash arm and a stainless steel cover. The plastic wash arm has a top surface, lateral surfaces, and a bottom surface and the stainless steel cover wraps over the top surface of the plastic wash arm, around the lateral surfaces of the plastic wash arm, and over a portion of the bottom surface of the plastic spray arm to hold the cover on the spray arm. The top surface of the plastic wash arm defines a series of wash jets and the stainless steel cover defines openings aligned with the wash jets so that the metal cover does not interfere with the wash jets.

Abstract: A process for cleaning pipelines and especially ventilation pipes and ducts in buildings, and includes a nozzle connected to a supply conduit through which a pressurized medium can flow. The arrangement includes a nozzle opening directed forward away from the supply conduit. The nozzle opening is in the form of a large continuous annular gap which extends along the periphery of the nozzle and is connected to the supply conduit and the source of a pressurized medium. The gap directs the medium toward the inner walls of the pipe or duct and effects a cleaning of the inner walls. The nozzle is moved into the pipe or duct by moving a rigid supply conduit.

Abstract: This invention relates to a supplementary washing device of a dish washer, which has an additional spraying device that provides a uniform spray of washing water to a wider area. The supplementary washing device of the dish washer includes spray arms formed in the washer tub for spraying water onto dirty dishes and a circular supplementary arm rotated by the washing water flowing out through static pressure influencing means, and a splashing means formed on the circular supplementary arm. The spraying means is a plurality of spiralled blades fixed to the underside of the supplementary arm, becoming lower as they extend to the circumference, or a combination of blades having different lengths and different curvatures of spiral for rotating the supplementary.

Abstract: A dishwasher comprising: a cleaning tank; a plurality of dish containers disposed vertically in the cleaning tank; cleaning means having a plurality of jetting openings for jetting cleaning water. The cleaning means comprises: a first arm nozzle disposed in a space below an upper dish container and rotating substantially horizontally; a second arm nozzle disposed in a space below a lower dish container and rotating substantially horizontally; and a third arm nozzle having a rotation axis eccentric in a predetermined distance from the rotation axis of the second arm nozzle and rotating on the second arm nozzle. The first arm nozzle jets cleaning water toward the upper dish container. The second and third arm nozzles jet cleaning water toward the lower dish container. The third arm nozzle eccentric from the rotation axis of the second arm nozzle jets cleaning water in a wide angle.

Abstract: A vacuum toilet system comprises a tank having a sewage inlet connection for entry of sewage into the tank, a level detector establishing a maximum filling level for the tank, and a spray nozzle assembly for distributing cleaning liquid inside the tank. The spray nozzle assembly comprises an axle member having a first end portion provided with a mechanism attaching the axle member to the tank and a second end portion defining a vertical axis of rotation. The axle member is hollow and defines a passage that extends from the first end portion of the axle member and debouches at an outlet at the second end portion thereof. The spray nozzle assembly comprises a spray head mounted on the second end portion of the axle member for rotation about the vertical axis of rotation.

Abstract: Disclosed is a washing nozzle by which tableware 5 positioned at blind spots in a rack 6 can be effectively washed without disturbing the tableware. In the washing nozzle A, a support part 22 is formed at a central position of the washing nozzle A and arm portions 23 are formed on both sides of the support part 22. Extended portions 24 are formed at each end of the arm portions 23. Further, jetting holes 29A having substantially the same size as those of jetting nozzles 27, 28 opened on the arm portions 23 are dispersedly opened over each entire area of the extended portions 24. Thereby, a quantity of the wash water jetted from the jetting holes 29A to the tableware 5 can be totally increased, while the jetting force of the wash water jetted from the jetting holes 29A does not become so strong. Therefore, the wash water can be uniformly jetted to the tableware 5 set in four corners of the rack 6 without occurrence the blind spots, and wash unevenness can be avoided.

Abstract: A dishwasher has a cleaning tank, a plurality of dish containers disposed vertically in the cleaning tank, and cleaning nozzles defining a plurality of jetting openings for jetting cleaning water. The cleaning nozzles include an upper arm nozzle disposed in a space below an upper dish container and rotating substantially horizontal, a first arm nozzle disposed in a space below a lower dish container and rotating substantially horizontal, and a second arm nozzle having a rotational axis spaced a predetermined distance from the rotational axis of the first arm nozzle and rotating on the first arm nozzle. The upper arm nozzle jets cleaning water toward the upper dish container. The first and second arm nozzles jet cleaning water toward the lower dish container. The second arm nozzle eccentric to the rotational axis of the first arm nozzle jets cleaning water over a wide angle.

Abstract: An automatic domestic dish washing machine has a chamber for the items to be washed and a pump to pressurize the washing fluid. A spray arm includes elongated top and bottom walls encompassing an elongated passageway to receive the pressurized fluid. A spray device has an elongated body with a passageway and an exit opening at each end of the passageway. A hollow support shaft extends perpendicular to the body and includes a passageway communicating with the body passageway. The shaft is mounted in the spray arm with lateral openings in the shaft communicating with the passageway in the arm so that fluid flows through the arm, shaft and body and sprays out through the exit openings. The lower portion of the shaft is cylindrical and extends through an opening in the bottom wall of the arm.

Abstract: A dishwasher has a pump mounted in the lower end of the tub to have outlet tube extending upward above the bottom of the tub. A wire rack has a fixed tower mounted on the rack with a rotatable spray tower journalled inside. A rotatable spray arm is mounted on the outlet of the pump and is moveable vertically into and out of engagement with the rotatable spray tower, with a spray arm having a downwardly extending collar carrying a seal that slides vertically on the outlet tube, while the wash arm rotates about the seal.

Abstract: A water spraying device for a tableware washer. The water spraying device comprises a rotatable frame, a water spraying arm rotatably supported by the frame and turned along with the frame, a water guide member for guiding the water to the spraying arm. The fixed shaft is mounted on the water guide member such that it vertically penetrates the support frame and exposes its top end to bile outside of the support frame. The support member is fixedly mounted on the top end of the shaft. The guider having a guide slot is fixedly mounted on the spraying arm. The connecting rod is movably placed on the support frame and levered by a hinge pin of the support frame, thus to convert a turning motion of the support frame into an opposed directional rotating motion of the spraying arm and to change the direction of the water spraying holes of the arm.

Abstract: An arrangement is provided for cleaning pipelines and especially ventilation pipes and ducts in buildings, and includes a nozzle connected to a supply conduit through which a pressurized medium can flow. The arrangement includes a nozzle opening directed back toward the supply conduit. The nozzle opening is in the form of a large continuous annular gap which extends along the periphery of the nozzle and is connected to the supply conduit and the source of a pressurized medium. The gap directs the medium toward the inner walls of the pipe or duct and effects a cleaning of the inner walls. The nozzle is moved into the pipe or duct as a result of reaction forces generated from discharge of the pressurized medium through the nozzle opening.

Abstract: The present invention provides a wash arm for a dishwasher which includes first and second openings which simultaneously propel the wash arm and rinse or back-flush filtered debris from a filter. The filter includes a settling chamber and a mesh screen, the mesh screen defining a portion of the top surface of the settling chamber and including inner and outer surfaces. Wash water flows through the mesh screen from the inner surface to the outer surface, causing filtered debris to be retained or trapped on the inner surface of the filter. The openings in the wash arm are downwardly and outwardly directed, and supply rinsing jets of wash water which impinge upon the outer surface of the filter and rinse retained debris from the inner surface thereof. The rinsed debris is thereafter held and suspended within the settling chamber until the dishwasher is drained. The pair of openings are radially displaced first and second distances from a center of the wash arm.

Abstract: An inlet construction is provided which is particularly useful in a spray arm for a dishwasher. The inlet is formed of a circular opening in a bottom wall of the spray arm and a flat plate positioned within the hollow arm, above the opening and generally perpendicular to the direction of the liquid jet directed at the underside of the arm. The plate is held in place by being pressed against a plurality of spacers formed on the bottom wall of the arm by resilient fingers positioned adjacent to each of the spacers. The liquid jet strikes the plate and the liquid is forced radially outwardly into the arms of the spray arm to be ejected from openings in the spray arm.

Abstract: A portable ground water sampling apparatus has a submersible pump or other water sampling apparatus attached through a hose to a hydraulically driven spool mounted on a boom attached to the bed of a truck or trailer. The hydraulically operated boom enables the operator to place the pump over the well and lower the pump into the well from the spool. A second spool also mounted on the boom operates a cable attached to a discrete liquid sampler or appliance of operator's choice for lowering into the well to take water samples or collect data. A decontamination apparatus is also attached to the boom and washes the hose and cable to remove contaminants therefrom. The contaminated wash fluid is removed to a holding tank for later disposal at a safe site. Hydraulically driven level-wind mechanisms are attached to each spool. A washer is provided for high or low pressure washing of bailers or other devices used to sample well water.

Abstract: There is mentioned a process and an arrangement for cleaning of pipelines, and especially ventilation pipes and ventilation ducts in buildings, by means of a largely spherical cleaning means (1) which is connected via a supply conduit (2) with a source of pressure medium, and which exhibits a nozzle opening in the form of a largely continuous annular gap (6) which extends along the periphery of the cleaning means (1) and which is connected to the supply conduit (2) and the source of pressure medium. The medium is made to discharge through the annular gap (6) in order partly to clean inner walls of the line, and partly, as a result of the forces of reaction from the discharging medium, to make the cleaning means (1) move into the pipeline. The cleaning means (1) is brought into contact with an inner wall of the line in that a reduced pressure is established between the cleaning means (1) and the inner wall and it is made to move around about the cross-section of the line by twisting of the supply conduit.

Abstract: Lacquer coatings are stripped from a large surface, e.g. aircraft and vehicle body surfaces, and the surface is simultaneously cleaned by a spraying device that carries at least three spraying units, each with at least one, preferably two, spray heads arranged in a row. Two outer spraying units flank one central spraying unit. The spraying device is secured to a free end of an outrigger arm on a mobile carriage, by a wrist mechanism, by a rod linkage, and by a mounting member (20a) tiltable by the rod linkage. The central spraying unit is directly secured to the tiltable mounting member while the two outer spraying units are secured by lazy tongues operable to track the contour of the large surface.

Abstract: A cleaning apparatus having a pan-shaped housing used to clean surfaces. Mounted on the top of the housing is a spinner assembly having a body containing a longitudinal passage. A tubular shaft rotatably mounted in the passage carries tubular arms located within the housing. The fluid flows from the hollow shaft into the arms and is discharged through nozzles having orifices mounted on the ends of the arms. The shaft has a head located in a chamber at one end of the passage. The diameter of the head is larger than the diameter of the passage and is dynamically balanced by the flow of fluid under pressure through the passage and chamber into the hollow shaft. The rotating shaft is laterally stabilized with a cylindrical boss attached to a cap threaded on the body. Alternatively, the upper end of the shaft has a cylindrical projection rotatably mounted in a recess in the cap to eliminate lateral movement and vibration of the shaft.

Abstract: A dishwasher includes a washing compartment defined in a cabinet for containing tableware and reserving a predetermined amount of wash liquid on the bottom, a wash pump sucking the wash liquid reserved in the washing compartment and feeding the liquid, a spray nozzle mounted in the washing compartment so as to be vertically moved, to receive the wash liquid fed from the wash pump and to spray the wash liquid to the tableware, and feed liquid pressure changing means for changing a pressure of the wash liquid fed to the spray nozzle during washing the tableware with the wash liquid sprayed from the spray nozzle so that the wash liquid pressure is increased and decreased at a plurality of times, thereby reciprocally driving the spray nozzle vertically at a plurality of times.

Abstract: Dishwashing machine comprising a wash tub (3) in which is housed a removable basket (5) supporting a rotary spray arm (7) supplied by a nozzle (10) with a water jet extending throughout an air gap to be conveyed into a diffuser (11) connected with the spray arm. The detergent dispenser (1) comprises a cup-shaped element (20) adapted to contain the detergent and mounted on the basket (5) above the spray arm (7) and adjacent to the diffuser (11) so as to receive from above part of the water suspended in the wash tub. The cup-shaped element is arranged around the intake of the diffuser (11), by which it is driven into rotation through friction gear means (22) and to which it is connected through a central hole (21) for delivering the detergent.It improves utilization of the detergent and prevents it from clotting.

Abstract: A dishwasher with a wash tub (4) with a removable rack (3) under which there is inserted a rotor (8) which is designed to be fed through a connection duct with rotating hydraulic joint extending upward from the bottom of the tub. The bottom of the rack (3) has several crosspieces (18), at least one of which has an angular, downward bend at the center (19), axially aligned with the rotor (8) and adjacent to it when the rack is in place in the tub (4) to limit the upward movement of the rotor (8).

Abstract: The present invention discloses a sink mounted dishwasher having a closure mechanism (41, 140) in the drain (15) of the sink (2). An hydraulic control system (FIG. 6) for such a dishwasher is also disclosed together with an hydraulically operated liquid detergent dispenser (47, FIG. 7). The preferred form of hydraulic fluid is liquid rinse aid. Two forms of spray arm (28, 128) are also disclosed, each with a structure (20) which enables the spray arm to be removably and rotatably mounted within the sink.

Abstract: In a reversible motor pumping system of a dishwasher, the reversible electrical motor has a drag shaft on which are mounted the impellers of a circulation pump and a discharge pump. The discharge pump is provided in a hydraulic discharge circuit so as to force fluid from the dishwasher after having washed the objects in the dishwasher. The discharge pump includes a lateral wall defining a chamber of a substantially circular section in which the impeller of the discharge pump is housed. An aspiration inlet is open to the chamber and communicates with the interior of the dishwasher while a delivery outlet is open to the chamber at a location spaced from the aspiration inlet such that a portion of the lateral wall defining the chamber extends between the aspiration inlet and the discharge outlet. This portion of the lateral wall constitutes a tooth of the discharge pump having a reduced inner diameter. At least one air intake is open to the chamber at the tooth of the discharge pump.

Abstract: The present invention is directed to a two chamber dishwasher pump wherein the pumping noise associated with recirculation is substantially lowered by reducing the intake area to the recirculation impeller thereby interrupting air pockets formed in the fluid while recirculating. In addition the noise associated with fluid drainage is minimized by an aperture between the drain chamber inlet and the drain outlet which allows fluid to flow from the inlet to the outlet thereby interrupting air pockets in the drain line which create the noise. In addition, fluid flows through the aperture in an opposite direction to that described above in order to relieve excessive pressure in the drain line during recirculation.

Abstract: A cleaning device for a tube of this invention comprises a nozzle supporting body fixedly attached to the insertion end portion of a cleaning hose adapted to be inserted into the tube in order to allow the cleaning device to be self-propelled and to allow a nozzle to be easily guided along the inner peripheral wall of the tube, the nozzle supported by the nozzle supporting body and having a first injection hole directed toward the inner wall of the tube, and an elongated nozzle guide member one end portion of which is fixedly to the nozzle, wherein second injection holes are formed in an oblique direction at the tubular portion of the nozzle supporting body so as to permit the cleaning device to be self-propelled.

Abstract: A surface cleaning device utilizing a pressurized flow of cleaning fluid from opposite ends of a rotatable shaft disposed under a generally cylindrical shallow housing, said nozzles being disposed at transverse angles to the elongate axis of said rotatable shaft such that the thrust created by discharge of cleaning fluid therefrom causes rotation of said rotatable shaft and thus cleaning action on a surface to be cleaned. In operation, the pressurized flow of cleaning fluid is passed through a swivel connection associated with the housing and into the rotating arm/nozzle apparatus. The cleaning fluid discharging from the discharge nozzles creates a thrust, and the angle of inclination of the discharge port of the nozzles relative to vertical creates a thrust and hence self-rotating motion to the nozzle/rotating arm apparatus.

Abstract: An apparatus for cleaning an annulus (13) formed between two generally concentric pipes (11, 12) includes a cleaning head (14) carried by feed tubes (15, 16) which position the head (14) at selected vertical positions within the annulus (13). The feed tubes (15, 16) carry fluid under pressure to the head (14). A valve (40) controls which of the feed tubes (15, 16) is receiving fluid under pressure. When valve (40) provides fluid through the tube (16), fluid is emitted through nozzles (18, 22, 25) in the head (14) to move the head (14) in one direction around the annulus (13) and clean the annulus (13). When valve (40) alternatingly provides fluid through the tube (15), fluid is emitted through nozzles (31, 32, 33) in the head (14) to move the head (14) in an opposite direction around the annulus (13). The head (14) may be simultaneously moved vertically within the annulus (13).