Abstract: A dishwasher includes a cabinet and a wash system slidably mounted within the cabinet in such a manner that it may be withdrawn horizontally out of the cabinet for loading with dishes. The wash system includes an open top wash chamber having a floor and side walls adapted to accommodate dishes within which wash liquid is sprayed. Two rotating spray arms are mounted in the bottom of the chamber for producing a spray of wash liquid within the chamber. A wash pump for pressurizing wash liquid discharges into a manifold located on the floor of the chamber. The spray arms receive wash liquid from the manifold. A drain pump evacuates wash liquid from said chamber. A wash chamber closure is mounted in the top of the cabinet. The closure engages with the wash chamber opening to sealably close off the wash chamber on its retraction into the cabinet.

Abstract: A dishwasher includes a spray assembly positioned in the wash chamber of the dishwasher's tub. The spray assembly includes a pump outlet that rotates relative to the bottom wall of the tub. One end of a flexible hose is secured to the pump outlet. The other end of the pump outlet is secured a belt that advances around a number of pulleys. Water is sprayed from the flexible hose via a number of nozzles.

Abstract: A spray assembly for an automatic dishwasher is provided comprising a conduit system for receiving pressurized washing liquid, and an elongated spray arm including an upper surface and a lower surface. The spray arm includes a dividing wall between the upper surface and the lower surface. The spray arm includes a plurality of orifices formed in the upper surface and the lower surface for distributing the liquid throughout the dishwasher. The dividing wall and the upper surface define an upper interior compartment and the dividing wall and the lower surface define a lower interior compartment. The conduit includes a water feed system and a water diverting mechanism for selectively diverting water into the upper compartment, the lower compartment, or both the upper and the lower compartments.

Abstract: The present invention relates to a dishwasher, and more particularly to a dishwasher having multiple wash zones. The dishwasher has an interior tub configured to provide an interior wash chamber for washing dishes. It also has a spray arm assembly configured to spray a first flow of wash liquid over a portion of the interior tub thereby providing a first wash zone. A spray manifold fixed adjacent a lower dish rack provided within the wash chamber is configured to provide a second flow of wash liquid toward the lower dish rack, thereby providing a second wash zone.

Abstract: Disclosed is a dishwasher, which reduces a pressure loss generated from a valve device to converting a channel. The dishwasher includes a washing tub to wash dishes; a sump installed under the washing tub to store washing water; a pump assembly installed at one side of the sump to pump the washing water; upper and lower channels connected to the pump assembly; and upper and lower spray arms connected to the upper and lower channels to spray the washing water to the inside of the washing tub, and a valve device rotated around a rotary shaft parallel with the flowing direction of the washing water to selectively open the upper and lower channels is provided between the pump assembly and the upper and lower channels.

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: An improved nozzle assembly for a dishwasher is provided. The nozzle assembly includes first and second nozzles rotatably installed adjacent to corresponding first and second racks so as to selectively spray water in first and second directions. One of the nozzles includes a device for manually setting the spraying direction, including a fixed central piece and first and second nozzle sections. The fixed central piece is in communication with a water circulator, and supplies water to the first and second nozzle sections. An open end of each nozzle section is rotatably coupled to an open end of the fixed central piece, and the first and second nozzle sections may be rotated using a manual setting device so as to direct a spray of water in different directions.

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 dishwasher (60) spray nozzle (20) is arranged on an outer surface (34) of a spray system (22) for discharging a spray jet (28). The outlet opening of the spray nozzle (20) has a constriction (26, 40) in a central region of its longitudinal extent.

Abstract: A nozzle structure of a dish washer is provided. In the nozzle structure, a nozzle holder is provided, a gasket unit is mounted on an end of the nozzle holder and it includes at least one inlet port, a flap support unit is protruded from a front of the gasket unit, and a check valve flap is rotatably coupled to the flap support unit.

Abstract: A substrate cleaning device comprises a chamber for cleaning a substrate; a substrate support installed in the chamber providing a surface for supporting the substrate during cleaning thereof; at least one cleaning solution supply outlet for spraying a cleaning solution onto a surface of the substrate; a vibration force generator for supplying a vibratory action; a vibration force generating shaft which receives said vibratory action from the vibration force generator so that said vibration force generating shaft vibrates for agitating the cleaning solution on the substrate; and a vibration force distributor for preventing a vibration force from being concentrated on a portion of the substrate below the vibration force generating shaft.

Abstract: An improved spinner bar for rotary surface cleaning machines includes an array of spray nozzles at each end of the bar. The nozzles in each array are adjustable. The outermost nozzle in each array is oriented at a different angle of inclination to the plane of rotation than the angle of the inner nozzles. The improved spinner bar results in a more uniform appearance in the cleaned surface, has a low noise level and reduces man-hours.

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: Water spraying systems for a dishwasher including water spraying devices for mounting on the ceiling, dish rack and a rotating spray arm of a dishwasher for effectively spraying water throughout the dishwasher cabinet. The device includes a housing on which a spinner is mounted that has an open trough and angled end for effectively spraying water and causing rotation of the spinner without clogging. The small size of the device allows placement in strategic locations for effective water spraying distribution and yet does not obstruct or reduce the placement of dishes, glasses, cups, utensils, pots, pans, etc. in the dish racks.

Abstract: A dish-cleaning appliance comprising a sink having a bowl defining a wash chamber with an open top for providing access to the wash chamber. A liquid recirculation system is provided for spraying liquid throughout the wash chamber. A drain conduit can be provided, alone or in combination with the recirculation system, for draining liquid from the wash chamber when the drain is closed. A fill control system is provided to ensure that the dishwashing cycle is not started with liquid in the wash chamber and that the sink drain is properly closed. One or more sensors can be provided for enabling the fill control system. The sensors can be located within the drain above the location where the drain is plugged.

Abstract: A device having at least one cleaning unit for cleaning installations, especially for the production and/or processing of food stuffs or pharmaceuticals is provided. The device may include a cleaning unit that is configured to move within the installation to be cleaned. The cleaning unit may also be provided with one or more nozzles with rotatable nozzle tips configured to rotate as cleaning agent flows through the nozzle tip.

Abstract: Dishwashing machine comprising a programme sequence control unit, at least two rotating spray arms, a circulation pump (3) capable of operating even intermittently, a distribution valve (10) arranged directly on the delivery-side section (6) of the pump (3) and having at least a first and a second outlet (11, 13) which communicate with a respective rotating spray arm. The shutter member (20) of the valve, in accordance with the flow direction of the liquor at the delivery side (6) of the pump, is adapted to selectively displace both between said first and second outlets (11, 13) and into an intermediate seat (15) situated between the same outlets. The duration of the pauses in the intermittent operation of the pump (3), as controlled by the programme sequence control unit, is correlated to the actual pressure at the inlet of the valve (10) by the action of means (21) provided to monitor the localized pressure of the liquor.

Abstract: A movement reversal device is used in a dishwasher. The dishwasher has a washing receptacle and a hydraulic assembly provided with at least two spraying devices impinging upon goods to be washed with a fluid transported via a circulating pump. The transported fluid flows through the movement reversal device that contains at least two outlets for feeding different spraying devices. The outlets are opened or closed by a positioning element such that one or several or all outlets are open or closed one after another and/or continuously. In order to better influence the course of the wash cycle and to obtain an optimal washing effect corresponding to the degree of dirtiness of the goods to be washed, the characteristics of the hydraulic assembly and the characteristics of the circulating pump are simultaneously or alternately changed by the movement reversal device.

Abstract: A dish-cleaning appliance comprising a sink having a bowl defining a wash chamber with an open top for providing access to the wash chamber. A liquid recirculation system is provided for spraying liquid throughout the wash chamber. A drain conduit can be provided, alone or in combination with the recirculation system, for draining liquid from the wash chamber when the drain is closed. A fill control system is provided to ensure that the dishwashing cycle is not started with liquid in the wash chamber and that the sink drain is properly closed. One or more sensors can be provided for enabling the fill control system. The sensors can be located within the drain above the location where the drain is plugged.

Abstract: A dishwasher includes a wash and rinse system that operates to dislodge soil particles that adhere to internal surfaces of a washing chamber. During wash and rinse cycles, the washing chamber is initially filled to a first level with washing fluid. The washing fluid is drawn into a wash system through operation of a pump, that causes the washing fluid in the washing chamber to fall to a second level, and directed to a spray arm that sprays jets of washing fluid onto the kitchenware. Thereafter, the wash system enters a pause period during which the washing fluid is caused to return to the first level in the washing chamber to loosen particles from walls of the chamber. After the pause period, the trajectory of the jets of washing fluid is varied to further clean the kitchenware and the internal surfaces of the washing chamber.

Abstract: A dishwasher includes a washing receptacle for items to be cleaned, a pump for liquid, a flow heater for liquid, a device for spraying items to be cleaned, a control device for wash cycles of the spraying device, and a device for providing steam having a separate steam dispenser and unit for producing a jet of steam supplied by the steam dispenser. The steam dispenser and the steam jet unit are disposed in the dishwasher in such a way that the steam jet unit always supplies steam to the same predetermined location in the washing receptacle specifically identified and configured for receiving particular items to be cleaned, e.g. particularly dirty items. An uncontrolled escape of steam from any section of the entire washing receptacle is prevented, thus improving the cleaning result with maximum usage of the steam and without also being dependent on activation of a separate steam washing cycle.

Abstract: A nozzle of a dishwasher reduces a space for installing a supplementary nozzle on a main nozzle by having first and second connectors coupled to be caught on each other between main and auxiliary nozzles. The nozzle assembly includes a main nozzle having a first coupling hole; an auxiliary nozzle, having a second coupling hole, for coupling with the main nozzle; a first interlocking device, having a first end, for coupling with the main nozzle at the first coupling hole, by being caught in the first coupling hole by the first end; and a second interlocking device, having a first end, for coupling with the auxiliary nozzle at the second coupling hole, by being caught in the second coupling hole by the first end and by having a second end to be caught on the first interlocking device.

Abstract: A water spray system for dishwasher with an upper dish rack and a lower dish rack, with each said dish rack being mounted for selective movement forwardly out the open front. A spray tube is rotatably mounted on the bottom of each lateral side portion of each said dish rack and has a plurality of spray outlets spaced along the tube and directed generally tangentially in the same direction for causing rotation of the tube. A water supply manifold extends up the rear wall of the dishwasher. A releasable water connection device and conduits mounted on each dish rack connect the manifold to the spray tubes for supplying the water from a pump. Spray spinners are centrally mounted below each dish rack. The spray tubes provide a thorough spray at the lateral sides that the spinners may not reach in a very wide dishwasher. Other rotating spray tube arrangements are also disclosed.

Abstract: A dishwashing machine containing spraying devices and at least one dish rack. The dishwashing machine has at least one dish rack having stationary spraying devices to optimally clean material stacked in the at least one rack and increase and optimize storage room in the dishwashing machine.

Abstract: A coatings removal head assembly for mounting on a self-propelled apparatus and for connection to one or more fluid supplies and one or more vacuum containment systems. A spring mounting assembly maintains a constant nozzle stand-off distance from a surface to be cleaned. A positively driven rotary spray bar assembly is employed to control the nozzle pass rate in conjunction with the movement of the self-propelled apparatus. A specifically configured exhaust is provided to enhance collection and containment of waste fluid and removed material.

Abstract: The invention has the objective of achieving high degree of hydraulic efficiency of the flow system—consisting of a circulation pump (1) and a water diverter (15)—in a dishwasher (2) with spray arms and with a circulation pump (1), having an impeller, a suction port (3) and at least one discharge port on the pump housing, with a water diverter (15) provided on the delivery side of the pump in order to generate a flow leading from an inlet to one of several selectable outlets associated with the spray arms, whereby the water diverter (15) has a blocking element (19) with at least one diaphragm opening (21) that can be positioned by a drive (20) in at least one outlet position.

Abstract: A nozzle assembly of a dishwasher enables injection holes of a top nozzle to selectively face a top or bottom rack to spray water toward the bottom rack when items to be washed are loaded on the bottom rack only. The nozzle assembly includes a first and second nozzles, rotatably installed adjacent first and second racks, respectively, for selectively spraying water in first and second directions. The first nozzle includes a device for manually setting the spraying direction. The first nozzle also includes a fixed central piece, communicating with a water circulator, having two open ends; and first and second nozzle sections, communicating with the fixed central piece and each having a closed end and an open end, the closed end of each nozzle section being rotatably coupled to one open end of the fixed central piece. The first and second nozzle sections are rotated using the manual setting device.

Abstract: A dishwasher includes a pump assembly which functions to chop all fluid entrained soil prior to directing fluid to upper and lower wash arms. A flow conduit leading to the upper wash arm is provided with a sampling port which directs a percentage of the fluid flow into a filter chamber having one or more fine mesh filter screens that open into the dishwasher tub basin. The filter chamber receives washing fluid through a sampling port that interconnects with the flow conduit. The filter chamber can be fluidly connected to a drain based on the position of a valve which opens when washing fluid recirculation ceases.

Abstract: The present invention relates to a washing device for a baby bottle. According to the present invention, it is possible to automatically wash a bottle body, a nipple and a nipple cap of the baby bottle, and to dry and sterilize the baby bottle after washing thereof. Further, the baby bottle can be used in a convenient and sanitary manner since the baby bottle can be washed with only water, even outdoors. Furthermore, thc baby bottle can be washed stably since there is provided a fixture capable of holding a bottle body or a nipple cap of the baby bottle to prevent them from being moved when the baby bottle is washed by injecting a washing liquid under high pressure. Since nozzle tube for injecting the washing liquid toward upper, middle and lower portions of the bottle body accommodated in a baby bottle washing chamber is integrally formed, the nozzle tube can be installed in a simple manner.

Abstract: A dish-cleaning appliance comprising a sink having a bowl defining a wash chamber with an open top for providing access to the wash chamber. A liquid recirculation system is provided for spraying liquid onto the dish rack to effect the cleaning of any dishes along the rack. A basket with a sprayer is disposed within the wash chamber. A self-aligning coupling fluidly connects a liquid conduit to the sprayer when the basket is seated.

Abstract: The invention is a spray arm hub/head for a high-temperature, automatic ware washer. The hub/head sub-assembly of the invention is mounted to the inlet water line via a double ball-bearing coupling that is independent of the hub. The substantially non-enclosed ball-bearing coupling enables the hub/head sub-assembly to rotate freely within the washer. Also, the hub/head sub-assembly has ports and clamps for removably receiving spray arm sub-assemblies. This way, the spray arms may be quickly and easily removed for repair and replacement. In addition, because the ball-bearing mount is not enclosed within the hub/head assembly, the bearing is readily accessible for cleaning and maintenance and is also easily removable for repair or replacement.

Abstract: An assembly for rotating and axially directing a high pressure spray hose and spray head to clean residue from the bores of thermal transfer tubes. The assembly includes a number of modular subassemblies that are concentrically aligned and mounted to rotate in synchrony and direct a high-pressure water hose and spray head. An air controlled operator control gun directs spray pressure and hose movement. A hose cleaning subassembly washes and/or brushes and cleans the hose exterior with a low-pressure spray. A hose drive assembly controls hose rotation and axial hose movement via biased pinch wheels that abut the hose. An eccentric linkage and spring tensioners coupled to the pinch wheels release and re-engage the wheels to the hose at a preset pressure. A layering arm stacks the hose in uniform layers at a hose reel. The diameter of the reel hub can adjusted relative to an outer cage.

Abstract: A fluid delivery device for delivering fluid to the backside of a substrate while minimizing waste. The device includes an inner cylindrical tube having a top opening and a bottom opening. An upper cap overlying a top portion of the inner cylindrical tube is included. The upper cap is moveably disposed over the inner cylindrical tube. The upper cap includes a top with at least one hole defined therein. The top includes a sidewall extending therefrom. A system and a method for reducing an amount of a cleaning chemistry applied to a backside of a wafer during a cleaning operation are also provided.

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 system for rinsing and cleaning a wafer carrier and a semiconductor wafer mounted thereon during a polishing process is provided. The system comprises a head spray assembly that includes a spray nozzle and a spray cavity. At least a part of the head spray assembly is moveably positionable between a park position and a spray position. The spray position is proximate to the wafer carrier such that liquid discharged from the spray nozzle is in liquid communication with the wafer carrier and the semiconductor wafer. The liquid as well as the materials rinsed from the wafer carrier and semiconductor wafer may be retained in the spray cavity and channeled out of the head spray assembly.

Abstract: A water spray system for dishwasher with an upper dish rack and a lower dish rack, with each said dish rack being mounted for selective movement forwardly out the open front. A spray tube is rotatably mounted on the bottom of each lateral side portion of each said dish rack and has a plurality of spray outlets spaced along the tube and directed generally tangentially in the same direction for causing rotation of the tube. A water supply manifold extends up the rear wall of the dishwasher. A releasable water connection device and conduits mounted on each dish rack connect the manifold to the spray tubes for supplying the water from a pump. Spray spinners are centrally mounted below each dish rack. The spray tubes provide a thorough spray at the lateral sides that the spinners may not reach in a very wide dishwasher. Other rotating spray tube arrangements are also disclosed.

Abstract: A drawer dishwasher includes a drawer which is movable from a closed to an open position. A lid is separate from the drawer and is adapted to seal over the top of the drawer when the drawer is in its closed position and to move upwardly and away from the drawer in response to movement of the drawer from its closed to its open position. Recirculation plumbing and draining plumbing are connected to the drawer dishwasher and lead to a remote pump and reservoir for receiving drained fluid from the drawer and for recirculating drained fluid back into the spray assembly within the drawer.

Abstract: Disclosed is a composition of about 20 to about 80 wt % benzotrifluoride and about 20 to about 80 wt % trichloroethylene. Up to about 1 wt % of a stabilizer for the trichloroethylene can be included in the composition.

Abstract: A denture wash for more thoroughly and easily cleaning dentures. The denture wash includes a lower assembly comprising a bottom wall, four walls, a plurality of nozzles, a first central nozzle, and a pump, a upper unit assembly comprising a lid, four walls, a plurality of nozzles, and a second central nozzle, and a denture holding assembly.

Abstract: A nozzle structure for a dish washer for washing tableware with washing water and rinsing water jetted from nozzle arranged in a washing tank. The nozzle structure comprising a shaft arranged on the nozzle, a nozzle mount provided in the washing tank and formed with a mount hole, which permits removable insertion of the shaft, and a coming-off preventing means for detachably preventing the shaft inserted into the mount hole of the nozzle mount from coming off.

Abstract: A dishwasher having a tub which includes a bottom sump and a side wall wherein a first dishware rack is supported within the tub and a second dishware rack is supported within the tub above the first dishware rack. A pump is provided for drawing wash liquid from the sump for pumping wash liquid through a pump outlet. A hub member is attached to the spray arm and extends downwardly from the spray arm. The hub member includes a bearing flange surface. A cap member which is connectable to the pump outlet has an annular bearing surface arranged between the bearing flange surface and the spray arm. The cap member is connectable to a housing wall provided about the pump outlet without the use of fasteners such that the spray arm may be readily connected to the pump outlet. The cap member is further provided with a discharge conduit. A supply line extends from the discharge conduit and is secured to the tub.

Abstract: A washing device or rinsing device for a dish washer comprises a washing arm or rinsing arm (14) and an axis which rotatably supports the washing arm or rinsing arm (14). The washing arm or rinsing arm (14) comprises a first chamber (36) and a second chamber (33) separate from the first chamber. The first chamber (36) and the second chamber (38) each have at least one inlet aperture (40, 50) and at least one outlet aperture (48, 48a, 22) for washing liquid or rinsing liquid. The at least one outlet aperture (22) of the second chamber (38) is designed as a corner spray nozzle and liquid can be applied thereto only in defined rotary positions of the washing arm or rinsing arm (14) on the axis (16).

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 parts washer is disclosed. The parts washer includes a housing that has a washbasin or wash chamber 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 toward 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 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 dishwasher including a third level washing apparatus which is low cost and effective in spraying water over the upper rack of the dishwasher is described. More particularly, and in one embodiment, the dishwasher includes a rotatable arm mounted in the dishwasher tub below the lower rack for providing first level washing, and a retractable tower secured to, and rotatable with, the rotatable arm and positioned to extend through the lower rack when fully extended. The retractable tower provides second level washing. The dishwasher also includes a third level wash apparatus having a base secured to the upper rack and an elongate body extending from the base. A water passage extends through the base and elongate body. In one embodiment, a spray member is spaced from an open outlet end of the elongate body, and at least one support member extends from the elongate body to the spray member for supporting the spray member at an elevation above the upper rack.

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: 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.