Abstract: A dishwasher includes at least one adjustable-height basket to which an associated spray arm and its inlet tube are secured. The inlet tube is disposed horizontally and is connected by a coupling to a supply line secured to a side wall of a tub. An open connection fitting and two closed blind fittings protrude toward the inlet tube. The coupling has two openings into which the connecting fitting and one of the blind fittings respectively protrude. In order to provide a simple way of assuring the joining together of the coupling to the fittings, and to assure that pressure losses in the water supply to the spray arm connected to the coupling through the use of the supply and resultant worsening of the cleaning action are effectively avoided, regardless of how the basket is loaded, the coupling has an end oriented toward the supply line with a centering plate and downstream thereof a sealing plate having flexible sealing lips and being freely movable between a housing of the coupling and the centering plate.

Abstract: The instant invention is directed in general to dishwashers and, more specifically, to a non-symmetric heating element/spray-arm alignment within a dishwasher. In a first embodiment of the instant invention, a dishwasher having a washing phase and a drying phase, includes a spray-arm having a center point, rotatably attached within a dishwasher and a heating element having a center point positioned within the dishwasher, where the center point of the heating element and the center point of the spray-arm are offset such that the heating element and the spray-arm are non-symmetrically aligned and the spray-arm is exposed to the heating element in varying regions during drying phases.

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 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 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 spray assembly for a dishwasher includes a fluid pump and a spray tower. The spray tower includes a lower stationary member and an upper rotatable member and includes a fluid cavity therein. The rotatable member has at least one spray opening adjacent its upper end. A spray nozzle directs a stream of washing fluid upwardly into the spray tower and moves the stream of washing fluid in a circular pattern. The stream of water engages the upper rotatable member of the spray tower and the upper rotatable member rotates in response thereto. One form of the invention uses a deflecting surface on the rotatable member for causing rotational movement of the rotatable member and for causing precession of the rotatable member. Another modification of the present invention utilizes a pair of intermeshing gears for causing precession of the rotatable member.

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: 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 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: An integrated recycling system for dishwashing machine includes an impeller positioned within the sump of the dishwashing machine, an impeller housing enclosing the impeller within the sump, and a motor for rotating the impeller within the impeller housing whereby a flow of water is achieved from the sump to one or more spray arm assemblies of the dishwashing machine, the impeller housing being formed from a strip of sheet metal that is cut to the proper length and wound around the impeller, defining an arcuate-shaped peripheral wall portion of the impeller housing that is open on opposing sides, one side being closed by a plate member and the other side being closed by a wall of the sump on which the impeller housing is mounted.

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: This single portable single-cup washer comprises a container having a locking cover. A water driven elongated member has a plurality of water-spray nozzles there along and at its base radial blades defining radial water-spray nozzles, and water passages for the water-spray nozzles. The elongated member is rotatably mounted at its base, inside the container and has a water inlet joining the water passage for revolving that member. The container has at the bottom a water-outlet. A cup holder is mounted onto the container above and adjacent the radial blades, for receiving a cup upside down and a spring fasten to the locking cover to urge against the bottom of the cup and thereby the top of the cup is pressing against the cup holder and thereby frictionally holding the cup and counteracting the water against the cup.

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 is provided having a rotatable spray arm. The spray arm has a circular flange for rotatably mounting the spray arm to a hub. The flange has a varying vertical contour around the hub. Food particles that may become interposed between the flange and the hub can roll out from under the flange or can be broken down in size by an up and down action caused by the flange.

Abstract: A reversibly operated dual impeller pump which simultaneously pumps and filters wash liquid. The pump includes upper and lower assemblies. The upper assembly defines a recirculation impeller chamber and a filter chamber which are separated by a cylindrical wall. A recirculation impeller housed within the recirculation impeller chamber pumps wash liquid, a majority of the pumped wash liquid being directed toward one or more wash rotatably mounted arms while a portion of the pumped wash liquid is supplied to the filtration chamber via a hole in the cylindrical wall. A novel vane structure is provided to direct the pumped wash liquid from the recirculation impeller to the wash arm. The lower assembly includes a lower pump housing, a separator plate, and a macerator assembly. The macerator assembly includes a vertical cylindrical wall which spaces the macerator blade from a bottom of the lower pump housing to prevent damaging contact between heavy or settled material and the blade.

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: An apparatus for cleaning large, flat hard surfaces such as concrete parking lots, sidewalks and plazas is provided The apparatus receives hot pressurized water and sprays the water downwardly onto the surface to be cleaned through a rotating manifold of spray nozzles. The manifold is mounted within a pushable cart or chassis, similar to a lawnmower chassis, for rotational movement in a plane parallel with the surface to be cleaned. Nozzles of the spray manifold are tilted at an angle such that water sprayed from the nozzles provides an angular momentum to the manifold. The apparatus is also provided with a mechanism for raising or lowering the height of the nozzles above the surface and for setting a minimum selected height.

Abstract: An apparatus and method for removing a coating of undesirable material from a substrate of desired material by impacting the coating with narrowly focused streams of fluid discharged at high velocity from nozzle tips rotated rapidly by a nozzle head during linear, relative movement between the nozzle head and the coated substrate. The nozzle head may be rotated by a motor or self-actuated by tilting the tips out of the plane of the spin axis. The nozzle tips also may be canted radially to undercut and peel away the coating. The nozzle assembly may be continuously or intermittently actuated, fixedly or movably mounted, and used singularly or in plural array. Specific applications are described for descaling metal, cleaning electrolytic bath deposits from electrodes, and removing resinous materials from metal surfaces.

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: 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: 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: Apparatus for washing the disc portions of an electrical insulator includes first and second mating housing portions for positioning about the discs and fluid lines for delivering a cleansing fluid through the housing portions for cleaning the surface of the discs. The two mating housing portions preferably define a basin for collecting the cleansing fluid and facilitating removal of the cleansing fluid after use. A support assembly including a robotic arm positions the first and second mating housing portions about the discs of the electrical insulator for cleaning. A cleaning liquid such as water or freon or a cleaning gas such as air or steam is applied through the mating housing portions for cleaning the surface of the discs. Following the cleaning, a surface-enhancing material such as a silicone coating can be applied to the surface of the insulator for protection from future contamination and make the insulator more resistant to electrical or mechanical degradation.

Abstract: A nozzle head comprises an immovable housing provided with a pressure water connection, a nozzle support rotatable about an axis in the housing, a rotatable hollow shaft connected with the nozzle support and having a central opening, a sleeve arranged in the central opening of the hollow shaft and sealed relative to the latter, and a suction hood provided with a suction pipe and having an upper end mounted on the housing and a lower end having a seal to be supported on a surface to be cleaned.

Abstract: A sewer cleaning apparatus having a movable vehicle provided with a hose which is adapted to be fed into a sewer and provided with a nozzle having a back spray for transporting the hose along the sewer. The hose is mounted at its end opposite the nozzle on a reel mounted on the vehicle and the vehicle contains means for rotating the reel to wind the hose back onto the reel. A second hose is connected to the first hose and extends to a remote source of water pressure such as a second vehicle having a water reservoir and a high pressure pump.

Abstract: An improved rotary sprayer for an automatic dishwasher includes a pair of elongated hollow arms containing a plurality of nozzles and a pair of end nozzles for periodically and alternately opening and closing, respectively by rotation of rotation converting valve which is, in turn, driven by valve driving member whereby dishes held in the dish racks is uniformly cleaned by spraying the surface of the dishes with the cleaning water by the nozzles.

Abstract: A self-aligning water jet receiver for a rotary spray arm rotatable about an axis of rotation on a dishwasher dish rack in which the rotatable spray arm is mounted on the dish rack and is rotated by the reaction force of water exiting through spray nozzles in the spray arm. An upwardly projected water jet supplies the water to the hollow spray arm. In this invention the liquid jet is received in a jet receiver that is mounted on the spray arm along the axis of rotation and is shiftable laterally by the force of the jet on the receiver to align the receiver coaxially with the jet.

Abstract: An upper spray arm is mounted to the underside of the upper dish rack of a dishwasher and rotates in response to a jet of water supplied through the lower spray arm. The upper spray arm mounting is provided with a self-aligning bearing which includes a stationary mounting platform attached to the upper dish rack and a flanged, cylindrical bearing connected to the spray arm. An enlarged bore in the mounting platform accommodates the bearing cylinder and permits radial movement of the bearing cylinder relative to the platform. The bearing flange transmits thrust forces to the stationary platform and slides radially relative to the platform to the extent the platform bore is larger than the bearing cylinder. Impetus for radial movement of the bearing and spray arm is produced by a bell shaped receiver located on the underside of the spray arm.

Abstract: A method and apparatus for cleaning a surface using a high velocity stream or streams of cleaning fluid. The high velocity stream or streams issue from one or more nozzles that are moving at a high velocity relative to the surface to be cleaned. In a preferred embodiment, three nozzles are mounted to a common hub member with two of the nozzles directed at the carpet so that they tend to move the hub member in a first direction about the axis of rotation. The third nozzle is directed at the carpet so that it tends to move the hub member about the axis of rotation in a second direction opposite to the first. The first two nozzles determine the direction of rotation and the third nozzle is then moved relative to the surface so that the velocity imparted to the stream issuing from the third nozzle because of its motion adds to the existing velocity of the stream due to the high pressure alone of the source of the cleaning fluid. This embodiment has been found to work particularly well on carpets.

Abstract: A method and apparatus for cleaning surfaces using a high velocity stream or streams of cleaning fluid. The high velocity stream or streams issue from one or more nozzles that are moving at a high velocity relative to the surface to be cleaned and are directed at the surface at an inclined angle thereto. In one embodiment, the source of cleaning fluid is under a high pressure of about 200 to 700 pounds per square inch and the nozzles are moving in a direction so that the velocity imparted to the issuing stream by each moving nozzle adds to the already high velocity of the stream due to the high pressure alone of the source of cleaning fluid. In another embodiment, two nozzles are rotated at a high velocity about an axis perpendicular to the surface to be cleaned with each nozzle being directed at a different area of the surface and having a different flow rate, angle of inclination to the surface, spray pattern, and/or spraying arc.

Abstract: An arrangement for oscillating a rotating dishwasher spray arm about its longitudinal axis to direct the jet sprays at the dishware items at various differing angles including forward, reverse and vertical inclinations to increase coverage and to improve the jet spray washing action by reducing shadowing. The oscillation is produced by a drive gear and crank mechanism driven by a fixed reaction gear as the spray arm rotates. Jet reaction forces are utilized to rotate the spray arm and are related with respect to the axis of rotation of the spray arm so that the resultant torque causing rotation of the spray arm does not significantly vary as the spray arm is oscillated to insure the proper rotational speed of the spray arm. The frequency of oscillation relative to the frequency of rotation is selected to be such that a number of differing jet spray angles are produced for each rotational position of the spray arm in successive revolutions thereof to minimize shadowing effects.

Abstract: A dishwasher water distribution system with a lower wash arm assembly and an upper wash tower, the wash arm assembly including a rotatable wash arm releasably fastened to a unitary distributor structure, the entire wash arm assembly with its distributor being telescoped on a lower stationary water inlet component and rotated and lifted by water pressure to sealingly engage and rotate the wash tower, the wash arm assembly being guided in its vertical shift by a bearing rod about which the entire wash arm assembly, as well as the wash tower, rotates. The lower wash arm assembly can be lifted from the bearing pin and the wash arm can be removed from the distributor by releasing clips integral with the unitary distributor structure.

Abstract: A dishwasher has a unitary spray and deflector disc member in spaced relation with its wash chamber top wall of a diameter so as to extend a sufficient distance across the chamber to intercept upwardly directed sprays of water. A diametrical spray conduit is incorporated with the disc including inlet means for accepting water from a top wall feed line for flow into two radial discharge streams to maintain the conduit full of water while exiting spray port means at each end of the conduit cause rotation of the disc. The water entering the disc inlet means and exiting the spray port means imparts stability to the disc to reduce the sound level within the chamber caused by impinging sprays thereon.

Abstract: A dishwasher having improved structure for separating food soil and the like from dishwashing liquid. The soil separating structure is associated with a suction passage leading to a circulation pump of the dishwasher provided for effecting circulation of the dishwashing liquid from a lower sump portion of the dishwasher receptacle back to the dishwashing space for washing dishes and the like therein. The soil separator includes an accumulator wherein the soil is collected for subsequent discharge as desired and structure responsive to a swirling action in the suction passage for effecting a circulation of a portion of the dishwashing liquid between the suction passage and the accumulator. The structure is arranged to utilize the combined swirling and longitudinal movement of the dishwashing liquid in the suction passage for effecting the desired soil separation by centrifugal action. Discarding of the collected soil may be effected by a suitable drain pump connected to the accumulator.

Abstract: A dishwasher having improved structure for separating food soil and the like from the dishwashing liquid. The soil separating structure is associated with a suction passage leading to a circulation pump of the dishwasher provided for effecting circulation of the dishwashing liquid from a lower sump portion of the dishwasher receptacle back to the dishwashing space for washing dishes and the like therein. The soil separator includes an accumulator wherein the soil is collected for subsequent discharge as desired and structure responsive to a centrifugal action in the suction passage for effecting a circulation of a portion of the dishwashing liquid between the suction passage and the accumulator. The structure is arranged to utilize the combined swirling and longitudinal movement of the dishwashing liquid in the suction passage for effecting the desired soil separation by centrifugal action. The discharge of the collected soil may be effected by a suitable drain pump connected to the accumulator.

Abstract: A complete dishwasher and sink assembly, including equipment usually installed separately, forms a unit that can be inserted in a cut-out in a countertop, and supported and secured in position at a peripheral flange. The connections to the associated utilities are positioned for maximum convenience to standard locations. A sink is pivotally mounted to provide a cover for the dishwasher chamber, and stiffener-deflector arrangements are provided to assure that the interior spray does not produce leakage out to the countertop through ventilation passages at the peripheral flange. Spray is applied to racks of dishes, preferably from rotating spray heads mounted on a movable carrier, with the supply of water to the spray heads being conducted via the hollow interior of the carrier and also the hollow interior of a sequence of interconnected links. The rotatable spray heads are also hollow, with molded projections forming directional jet orifices.

Abstract: An apparatus for selectively modifying the vertical height of an upwardly extending tower structure for an automatic dishwashing appliance. The tower structure is provided with a bearing surface adapted to receive a collar having an upper end on which a rotatable spray arm may be mounted. As selected by the operator of the dishwashing appliance, the vertical height of the collar may be modified such that the upper spray arm is positioned in an upper or a lower position.

Abstract: A square base with upright side walls and a flat top wall defining a large circular opening has an upstanding ring spaced concentrically around the opening. A cylindrical hood open at the bottom fits within the ring and is pivotally connected to the top of the base. A pair of fluid pressure operated cylinders with piston rods are connected to opposite sides of the base and the hood to swing the hood about its pivot to open position above the base. A work supporting grid is supported within the base below the ring. A tank is connected to one side wall of the base, and an inclined collector plate located in the base below the grid drains to a hole opening to the top of the tank. Liquid delivery couplings connected to the top of the hood and the top of the collector plate centrally thereof with fixed cylindrical outlet housings projecting toward the inside of the hood have receiving connections on their ends located outwardly of the hood and plate.

Abstract: Method and apparatus for washing dishes allowing independent control of washing liquid flow to upper and lower baskets. A valve allows selective reduction of liquid flow to an upper washing arm and/or by-passing liquid so that it does not flow through the washing arm nozzles.

Abstract: A tank cleaning device, wherein a supply tube delivers cleaning fluid into a flushing head rotatable about the tube axis and then into the nozzle of a nozzle unit mounted in the flushing head for rotation about an axis perpendicular to the tube axis, comprises a hydraulic brake cylinder coupled to the nozzle unit for variably controlling the rotational speed thereof in dependence on the rotational position of the nozzle unit. A crank couples the brake cylinder (or piston) to the shaft on which the nozzle unit is rotated for oscillating the cylinder (or piston). A mechanism couples the piston (or cylinder) to the flushing head for rotating the flushing head about the supply tube axis upon oscillation of the cylinder (or piston).

Abstract: Dishwasher pumping and filtering system provides for recirculation of filtered liquid in the form of either washing solution or rinse water, coupled with outside water-jet impingement flushing of filtered food particles from the filtering system and down a drain at the end of a washing or rinsing period while draining the liquid from the dishwasher.

Abstract: A dishwasher having a washing chamber with upper and lower dishracks disposed therein and having associated therewith upper and lower spray devices supplied with washing liquid respectively by first and second pumping devices. The first and second pumping devices are commonly mounted in a sump of the washing chamber and driven by a single unidirectional motor. The pumping devices are positioned in axial relation to one another with the lower or first pumping device supplying washing liquid at a lesser pressure to the upper spray device and the upper or second pumping device supplying washing liquid at a higher pressure to the lower spray device.

Abstract: A dishwasher has upper and lower spray arms, a telescoping spray tower and a filtering system which includes a frusto-conical screen cage, the outside of which connects to a dishwasher sump by way of a tangential channel including a drain opening therefrom. The inside of the cage connects to the inlet of a double outlet, centrifugal, recirculation pump. Particulates are filtered from recirculating dishwashing fluid on the outside of the screen as the fluid swirls around the cage in a clockwise direction. The tangential approach of the fluid sets up centrifugal forces as an aid in removing filtered particulates from the outside of the screen. A backwash spray rotates in a counterclockwise direction on the inside of the cage to keep the particulates from sticking to the screen. The pump volute is divided into two predetermined volumes rotated with respect to one another to produce two distinct cutoff points and outlets.