Abstract: The nozzle device having a plurality of spray orifices comprises a nozzle support rotatably mounted about a rotation axis and driveable by the reaction force of pressurized water issuing from the orifices. The nozzle device may be used with high operating pressures, high temperatures, corrosive environments and high-rotational speeds. The current embodiment is particularly designed for cleaning surfaces. A fluid-conducting swivel includes an acceleration nozzle, deceleration nozzle, and support assembly for holding the acceleration and deceleration nozzle with their flow passageways aligned, allowing rotation of one of the acceleration and deceleration nozzles, and maintaining a space between the adjacent ends of the nozzle. The acceleration nozzle includes an acceleration nozzle for accelerating the velocity of the fluid flow to such a velocity that the fluid creates a vena contracta, a substantially self-contained fluid jet.

Abstract: A swivel jet assembly 20 for a fluid distribution system delivers high pressure fluid from a pressurized fluid source to an object to be cleaned. A bearing housing 46 is removably affixed to a swivel body 32 having an inlet port 34 and a fluid transmission passageway 36 therethrough. A hollow shaft 40 has an upstream end positioned within the swivel body and a downstream end extending outward for engagement with a nozzle assembly 30. One or more nozzle jets 116, 118 are supported directly within a nozzle housing, and are angled for causing a torque in response to the high pressure discharged from the nozzle jets. A speed control device within the swivel housing includes a plurality of pins 58 each movable radially outward in response to centrifugal force for engagement with the swivel housing. The swivel is of the in line design, and a thrust bearing 66 is provided within the swivel housing upstream from the swivel speed control device.

Abstract: An animal-patterned sprinkling device includes a left and right animal-shaped housing halves, a water tube, several fitting washers, a fixing washer, upper and lower semispheric water discharging members and several sprinkling heads. At a top end and a bottom end of each of the animal-shaped housing halves are respectively formed two semicircular holes. Several posts and hollow cylindric columns are formed on inner faces of the left and right housing halves. The fitting washer and fixing washer are formed with rectangular teeth peripheries. The upper semispheric water discharging member has a central engaging tube which downwardly extends from a top end thereof. A lower end of the water discharging member is formed with four downward extending insertion plates. Four communicating tubes are disposed on a middle section of the engaging tube. Two eccentric stepped water discharging openings are formed at an upper end of the engaging tube.

Abstract: A swivel jet assembly 20 for a fluid distribution system delivers high pressure fluid from a pressurized fluid source to an object to be cleaned. A bearing housing 46 is removably affixed to a swivel body 32 having an inlet port 34 and a fluid transmission passageway 36 therethrough. A hollow shaft 40 has an upstream end positioned within the swivel body and a downstream end extending outward for engagement with a nozzle assembly 30. One or more nozzle jets 116, 118 are supported directly within a nozzle housing, and are angled for causing a torque in response to the high pressure discharged from the nozzle jets. A speed control device within the swivel housing includes a plurality of pins 58 each movable radially outward in response to centrifugal force for engagement with the swivel housing. The swivel is of the in line design, and a thrust bearing 66 is provided within the swivel housing upstream from the swivel speed control device.

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: The rotating liquid distributor includes a circular distributor housing with an upwardly open annular channel. The channel bottom has spaced outlet openings at an even mutual distance. A supply pipe for liquid under pressure is centrally mounted in the distributor housing and is connected to a vertical, rotatably mounted hollow rotor stem with an upper transveral hollow rotor arm. Downwardly slanted nozzles extend from the rotor arm, flush with the outlet openings to produce a turning moment through the supply of liquid under pressure. The downwardly slanted nozzle is surrounded by a screen with an upside down U-shaped cross section. The screen has sidewalls that extend down into the annular channel on each side of the downwardly slanted nozzle in order to catch liquid splashed. A transporting roller which fills out the cross section of the annular channel, is fastened by a draw bar to the rotor arm.

Abstract: A self-propelled cleaning device for a tube where it does not revolve along the inner circumferential wall of the tube used as a piping when desired, and further permitting such a device to revolve along the inner circumferential wall of tube as an occasion demands. The cleaning device for a tube comprises a nozzle supporting body including a main flow path in an axial direction, and for self propelling having ejection holes in an oblique direction communicating with the main flow path formed on the upstream side to which a hose is connected. The main flow path communicates with a liquid supply path formed on the secondary side of a bearing portion for supporting a tubular revolving body having ejection holes for an unbalanced force. A slide valve is internally provided on the secondary side of the nozzle supporting body and is constantly forced in a valve seat direction by a spring member.

Abstract: A new and improved lawn sprinkler apparatus includes a portable, nonrotating body assembly which includes an adaptor assembly for connecting to a water source. The body assembly includes an internal water flow path. A rotatable sprinkler head assembly receives water from the water flow path and dispenses water through a plurality of water nozzles supported by the rotatable sprinkler head assembly. A rotatable, water-tight connection assembly connects the rotatable sprinkler head assembly to the water flow path of the body assembly. A rotatable decorative assembly is connected to the body assembly. The decorative assembly includes a paddle wheel which is driven by water flowing in the water flow path. The body assembly simulates a helicopter body; the rotatable sprinkler head assembly simulates a main helicopter rotor; and the decorative assembly simulates a helicopter tail rotor.

Abstract: A high-pressure water spray gun is disclosed for use, for example, for fire-fighting. The spray gun has a cylindrical body for connection to a supply hose and a spray lead rotatable in the body by water issuing through pairs of jet nozzles around the barrel of the spray head. In each pair of nozzles, the axes of the nozzles are convergent and being closest to each other in a mixing region at, or just outside of, the outer surface of the barrel. At least one nozzle has a non-radial axis. The spray head may be normally housed in the body, being moved to an exposed working position by water pressure against a spring.

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: For removal of a painted surface (12), a rotating head (18) provided on a housing (10) is used, said rotating head (18) being provided with nozzles (19,20) which said nozzles (19,20) discharge high-energy jets (39) under high pressure towards the surface (12). The rotating head (18) is set into rotation by the recoil of the discharged high-energy jets. On the rotating head (18) an impeller (30) is secured constituting a centrifugal pump for the discharging of liquids in the housing (10).

Abstract: A process for applying particles to a geographic region. The process involves flying a balloon over the region. The balloon carries a nozzle with a pipe communicating the nozzle with a ground supply of air and a source of particles. A mixture of air and particles can be forced up the pipe to the nozzle. The particles are then discharged over the region according to a pre-determined pattern. The process permits the accurate measured application of fertilizers and the like to a forest region.

Abstract: A rotating spray nozzle has a nozzle mounting member, for attachment to a supply pipe. A nozzle body is rotatably mounted on the nozzle mounting member, and includes at least one, but preferably two, slot-shaped nozzles. Each slot-shaped nozzle generates a fan-shaped spray in a plane. Each nozzle is inclined to intersect the axis of the nozzle axis, to ensure thorough distribution of spray, on either side of the nozzle body, across the nozzle axis. The slot-shaped nozzles can be formed as slots in a unitary nozzle body.

Abstract: A method and apparatus for preventing formation of solids in a tank and for removing solids contained in the tank, a pipe assembly rigidly connected to the tank for conveying heated liquids to the interior of the tank, a rotatable jet assembly rotatably connected to the pipe assembly for receiving the heated liquids from the pipe assembly and spraying the heated liquids onto the bottom of the tank.

Abstract: A wash arm construction for a dishwasher includes an elongated wash arm having a hollow spray cavity contained therein. Within the spray cavity are one or more subcompartments which have inlet openings providing communication from the spray cavity into the subcompartment. A first group of these spray openings is in direct communication with the spray cavity, and a second group of openings is in direct communication with the subcompartments. The size of the openings to the subcompartments from the spray cavity cause a lower spray pressure to be achieved within the subcompartments than is achieved in the spray cavity.

Abstract: The invention relates to a nozzle for the generating of a rotating jet. It comprises, internally to a head (1) equipped with an outlet hole (2), a rotor (3) fed by the pressurized fluid, on which a nozzle-bearing body (8) is coaxially and solidly rotatably constrained. The nozzle-bearing body (8) bears, at its free end and coupled in a seating (11) arranged coaxially to the outlet hole (2), an outlet mouth (9) which belongs to a nozzle (10) whose axis is incident at a predetermined inclination to the rotation axis.

Abstract: A garden-type water sprayer includes a figure configured as an animal and defining a stationary body part and at least one movable body part. A drive is mounted on the figure and adapted for fluid communication with a water supply under pressure, the drive directing a water spray against the at least one movable body part to move the same.

Abstract: A fluid jet cleaning system, particularly adapted for household use, comprises an elongated flexible hose coupled at one end through a quick-operating on-off valve to a source of pressurized water and whose other end contains a jet nozzle assembly including a head having an ejector opening for discharging a high velocity jet stream for dislodging collected debris and a rotatable spinner sleeve containing tangential openings for emitting additional jet streams that rotate and that flush the debris and provide a secondary cleansing of the drain wall 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 rotating nozzle for a high pressure water blasting system comprising a rotating body mounted on a fixed shaft having a high pressure water passage therein and adapted to discharge a stream of high velocity water through a nozzle opening in said body that is inclined relative to the longitudinal axis of the rotating body to direct the discharge from the nozzle in a circular path when the body is rotated.

Abstract: A pulsating nozzle which includes a rotating head driven by reaction forces of high pressure water passing through outlets disposed at an angle to a plane normal to the axis about which the head rotates and through a plurality of spaced passages extending partially circumferentially with respect to such axis.

Abstract: A shower head is arranged to include a cylindrical skirt having an internal groove rotatably receiving a plate, wherein the plate includes angulated apertures directed therethrough to effect rotation of the plate relative to the shower head when pressurized fluid is directed through the plate.

Abstract: A rotating head mounts a nozzle which creates cavitation in a pressurized fluid such that a surface may be quickly and efficiently cleaned. The rotation of the nozzle ensures a relatively wide cleaning path. The cavitation allows cleaning using only the pressurized fluid jet without any necessary abrasives, while still fully utilizing high rotational speeds. A preferred cavitating jet nozzle is also disclosed for producing cavitation in the pressurized fluid. The cavitating jet nozzle includes a pin received at a central position which lowers the pressure of the pressurized fluid such that cavitation bubbles form in the fluid. The pin is self-centering within the nozzle since it is free floating relative to a securing member which retains the pin in the nozzle. In addition, the pin preferably has an end face upstream of an outlet portion of the nozzle.

Abstract: A rinse nozzle for an aircraft waste tank includes a tubular member mountable at one end in an opening in the waste tank for receiving cleaning solution through said one end to the interior of the tubular member. The other end of the tubular member extends into the tank and is closed to prevent the exit of cleaning solution out that end. The tubular member has a midsection with a reduced radius and a plurality of first openings circumferentially spaced apart around the midsection. An annular collar is rotatably disposed about the midsection of the tubular member and includes a plurality of second openings disposed thereabout, at least some of which extend outwardly and rearwardly of the direction of rotation of the annular collar to thereby cause the collar to rotate as cleaning solution flows from the tubular member out the first openings against the collar and then out the second openings.

Abstract: The cleaning nozzle of the invention is intended to clean the parts to be cleaned by the cleaning water, by feeding cleaning water into the cylinder tube, pushing out the injection nozzle from the mounting surface by the pressure of the cleaning water, and injecting cleaning water while rotating at the same time. Next, when the feed of cleaning water is stopped, the injection nozzle stops injecting cleaning water, and is simultaneously retracted into the housing, thereby closing the mounting part by the poppet valve.

Abstract: A water sprinkler is disclosed having a rotatable water driven nozzle member and a stationary spout for simultaneously discharging a twirling stream of water from the nozzle member and a pulsating stream from the spout. A chamber is provided within which a pulsating valve is rotatably mounted about its hollow stub shaft. The shaft is secured to the nozzle member for rotation therewith, and allows passage of water from a water inlet through the nozzle member. The stub shaft of the pulsating valve further has a laterally extending segmented plate for intermittently opening and closing the spout for allowing a pulsating stream of water to pass therethrough. The water sprinkler is further provided with one or more water outlets connectable to a hose or spray forming nozzle. A rotary valve is provided for selectively connecting the water inlet to a selected one of the chamber and water outlets. The outer housing of the water sprinkler is formed to simulate a colorful fire hydrant.

Abstract: A nozzle assembly used for assisting in the diagnosis of cylinder condition. The nozzle assembly emits oil normal to the axis of the assembly about a 360 degree arc such that the cyclinder walls are more completely wetted with oil prior to diagnostic tests occuring such as leakage or flow rate and compression checks. A spinning nozzle provides enhanced oil emission.

Abstract: Spray nozzle for high pressure cleaning. The spray nozzle comprises a stationary body having an inlet portion and a tubular stem or outlet portion, which has therein a bore and a counterbore, respectively; a plurality of laterally extending ports extending from the counterbore to the exterior of the stem portion for discharge of high pressure water; a rotor having aligned tubular end portions defining a bore and a central rib portion of enlarged diameter having an annular channel or reservoir for water therein, and a plurality of orifices extending from said annular channel so configured as to cause self-rotation of the rotor; and an end cap and a machine screw to hold the rotor in place and restrain it from axial movement. Flow restrictors slow down the speed at which the rotor rotates by momentarily obstructing the discharge of water from the ports in the stem portion as the flow restrictors cross the discharge paths.

Abstract: To render residues such as thickened sludge and sedimented crude oil or refinery products which collect at the bottom of a tank into pumpable flowable condition, crude oil is taken from an upward region of the tank, pumped upwardly to a suction pump (609)-pressure pump (605) unit (610) located, for example, on top of a floating roof of the tank, the pressurized crude oil taken from the top portion of the tank being reintroduced through a preferably rotating liquefaction lance (13) to a region in the vicinity of the sedimented sludge. The pressure is converted into hydrodynamic energy. Preferably, a plurality of such lances are used, arranged with respect to each other to form eddies or vorteces, to establish flow patterns within the tank, thereby liquefying the sludge or residues and rendering them into pumpable flowable condition for removal from the tank.

Abstract: A method and apparatus for cleaning the interior of ductwork or similar conduit from within, the apparatus comprising a small, pneumatically powered and controlled carriage of a size maneuverable inside the duct, with nozzle means provided for directing cleaning and disinfecting fluids, under pressure, at the walls of the duct, to execute a method of cleaning and disinfecting.

Abstract: A nozzle head comprises a plurality of nozzles, a nozzle carrier rotatable about an axis and driveable by a reaction of a pressurized water discharged from the nozzles, a stationary housing, a hollow shaft extending through the housing and having a central passage, a sleeve extending through the central passage of the hollow shaft, the sleeve forming a supply conduit and extending to the region of the nozzle carrier. The sleeve has a free end which is closed and a transverse opening which opens into the supply conduit, the nozzle carrier having a plurality of passages extending from the transverse opening to the nozzles for supplying pressurized water, and the nozzles being arranged so that water jets discharged from the nozzles are interrupted into edge regions of a jet curve parallel to a displacement direction of the nozzle head relative to an object.

Abstract: A combination ornament in the form of a flower and a sprinkler head is provided. The flower is made up of petals and is swingably supported on the sprinkler head. A piston in the sprinkler head is actuated by a water supply which moves the piston upward to move the petals downward out of line with the sprinkler head. A spring is provided in the sprinkler head for forcing the piston downward when the water supply is shut off, for moving the piston and the petals to a closed position.

Abstract: Lawn sprinklers and related devices receive a fluid under pressure and convert its potential energy to kinetic energy; and their spreading range depends on the kinetic energy of the issuing jets. The object of present invention is a device of this class in which, however, the energy of a fluid from a single source is internally so redistributed, through pressure exchange, that different jets are made to issue from it at different kinetic energy levels, thereby making it possible for the sprinkling or spreading to cover a considerably wider area (for any given source pressure) and to do so more evenly.

Abstract: The self-rotating nozzle has a hollow shaft adapted for connection to a source of pressurized fluid. A body has an axial bore upon a central axis secured over one end of the shaft and has a counterbore. The shank with an end portion extends from the body into which the counterbore extends with the counterbore terminating in a pair of radial ports. A head bears against the body and is journaled upon the shank. A fastener upon the end portion retains the head against axial movement in one direction relative to the body. A fluid pressure chamber acts upon the head in the other direction.

Abstract: This invention relates to a device for the delivery of a fluid to be frozen in equipment for the formation of ice cubes, which includes a rod spraying the fluid on an evaporator and drive means for rotating the rod which are activated by the same fluid to be frozen.

Abstract: A system which has a body (20) with internal pasageways and a hollow connecting sleeve (24) attached thereto. A hollow union (32) is rotatably retained on the sleeve (24) and a gasket (30) provides a seal therebetween. A pair of adjustable arm stops (34) attach to the union (32) confining the rotational movement. A nozzle (36) is joined to the body (20) with an arm (42) distending parallel with the nozzle (36) and a pivotal member (44) extends upwardly therefrom. A plate (46) is swivelly mounted on the member (44) with means to limit the pivotal movement connected to the arm (42). The fluid from the nozzle (36) impinges on the plate producing unequal torque on opposed sides of the plate (46) as it pivots upon the member (44) causing the entire arm (42) to axially advance. In the reversing embodiment a torque differential and flow impingement upon the stop (34) combine energy functions and reversers.

Abstract: The spray device comprises a central support and supply element bearing a rotational body for rotation about a central axis. At least one nozzle element is attached at the front surface of the rotational body at the outlet side of the spray device. The axis of the nozzle element is offset both to the central axis and to the direction of rotation of the rotational body. The rotational body is closely surrounded by a jacket.

Abstract: A method and device for spraying agricultural crops where a liquid, for example a fungi-insecticide, growth regulating substance or fertilizer, is atomized in a conical or flat spray plane (24), wherein the spray mantle (24) is partially interrupted so obtaining an asymmetrical spray picture whereby an accurate and even concentration can be achieved. An atomizing body (9) is rotatabe around a stationary part (1) formed as a hollow cylinder, whereby a groove (14) connecting with the cylinder space (3) is formed in the surface of the cylinder (1) over a circumferential portion, onto which ducts (12, 13) are arranged in the rotation atomizing body (9) in each case connect resulting in that a very even cone mantle with a vertical angle of 150.degree. can be achieved so that the atomized liquid strikes the field produce on the underside of the leaves.

Abstract: A swirl jet nozzle as a hydraulic work tool is to be capable of operating reliably as a structurally simple tool, with smooth outer surfaces as far as possible, requiring neither bearings nor seals, so that it is also suitable for cleaning clogged, narrow tubular parts, in particular pipes, with a high-pressure medium and for drilling holes in soft materials. This is achieved by a sleeve-shaped rotor (1), arranged directly above a tapered neck (5) of a stator (2), being provided, which is supported on the stator side on a face (7) of an extended region (8) of the stator (2), preferably via a washer (6) of plastic or the like pushed over the neck (5) of the stator (2), and is axially secured by means of at least one pin (11) engaging tangentially into a circular groove (9) in the neck (5) and borne in a cross bore (10) in the rotor (1).

Abstract: An apparatus and method for raising liquids from one level to a higher level by means of a centrifugal pump operating in air for minimum drag, is described. A sealed tank is half filled with liquid and the remaining space is subjected to an externally applied pressure, thereby raising the liquid in a tank exit tube to a height determined solely by the pressure in the tank. Further liquid is introduced into the tank, against the pressure therein, by means of a rotating inlet tube provided with a plurality of radially extending exit tubes which rotate about a vertical axis in the air space above the liquid in the tank. The inlet tube is rotated by means of an electric or other power source located either internally or externally of the tank.

Abstract: A method of forming a spray nozzle along a fluid conduit includes forming a hole into a length of tubing and then providing a countersink for the hole. A portion of the tubing is then depressed inwardly along an imaginary line along the tubing outer surface that is parallel to the central tube axis and that passes over the hole. An apparatus for carrying out the method is also disclosed.

Abstract: A dishwashing machine including upper and lower dish supporting racks and a liquid wash spray assembly having a rotating arm for spraying water upwardly on the lower dish load and an extendable top wash tube which sprays liquid at an intermediate level between the upper and lower dish supporting racks in the machine. A liquid diverting system provides means for automatically alternating the flow of water between the rotating spray arm and the extendable top spray tower. Water is directed continuously to a jet port on the spray arm which insures that the arm will continue to rotate independent of the liquid diverting system when the water is diverted to the top spray tower. The spray arm and tower each deliver effective water flow on an alternating basis while the overall flow rate and the total water consumption is reduced.

Abstract: A nozzle for injecting fuel into a combustion zone including a stationary nozzle body having a main fuel passage therethrough connected to a source of fuel under pressure, an auto-rotating tip disposed on the nozzle body for rotation about a main axis of the latter, a fuel distribution cavity between the tip and the nozzle body connected to the main fuel passage and filled with pressurized fuel, and a plurality of fuel passages in the tip exposed to pressurized fuel in the distribution cavity. Each of the fuel passages is disposed in a plane perpendicular to the main axis and is slanted relative to one of a corresponding plurality of radii emanating from the main axis so that jets of fuel issuing from the fuel passages develop reaction forces on the tip having components tangent to a circle about the main axis which reaction forces spin the tip to disperse fuel in the combustion zone in a volume of revolution about the main axis.

Abstract: The spin blast tool includes a housing having a tubular member rotatably disposed on bearings in the housing. A nozzle is mounted on one end of the tubular member and the other end of the tubular member is connected to a pressurized air and sand source. That end of the tubular member adjacent the presurized air and sand source includes a counterbore for receiving a tungsten carbide throat insert. The throat insert has an inner diameter which is smaller than the inner diameter of the tubular member. The insert has an annular radial flange juxtaposed with the end of the pressurized air and sand source. A polyurethane seal washer circumscribes the throat insert and is housed between the radial flange and the end of the tubular member. A wafer spring section is compressed between the outboard surface of the radial flange and the end of the pressurized air and sand conduit. The wafer spring section provides constant pressure on the throat insert as the throat insert wears.

Abstract: A rotary spray arm structure for a dishwasher or the like rotatable about an axis of rotation, the spray arm structure having an entrance passage coinciding with the axis of rotation for receiving a pressurized column of liquid, the entrance passage opening to a hollow interior of the spray arm, and a plurality of nozzles spaced along each hollow arm of the spray arm means with each nozzle having an entrance end at the hollow interior and an exit end for discharging the liquid, the hollow interior in each arm constricting from adjacent the axis of rotation to adjacent the outer end of each arm and liquid supply ramp means leading from the hollow interior of each arm to the inner entrance end of each nozzle with each ramp comprising a groove angled outwardly toward its nozzle.

Abstract: A water propelled hover toy (10) comprises a circular body (24) with a fluid supply chamber (36) affixed thereto. The body (24) is rotatably secured at an inlet port to the supply chamber (36) to a launch tube (12), which is connected to a water line by means of tubing (14). The sections of tubing (12, 14) are preferably coupled together by means of a rotary connection (22). In each of the embodiments, the body (24) is preferably configured to generate lift during rotation.

Abstract: A fluid jet device for removing foreign matter from a pool of liquid comprising a hollow substantially cylindrical housing including a housing channel formed therein, an elongated rotatably member including a convoluted spiral formed on the outer surface thereof disposed within the housing channel and a coupling device to rotatably mount the elongated rotatably member to permit fluid to pass rapidly through the convoluted spiral to cause a rotation of the elongated member continuously changing the direction of the fluid exiting the fluid jet device.

Abstract: A hollow elongated spray arm for transmitting washing liquid from a conduit leading from the pump, the arm having one or more radially extending projections having a plurality of spray orifices therein. The projections include a guide disposed adjacent at least one of the orifices for orienting relatively long slender foreign objects suspended in the washing liquid to insure that such objects can pass through the orifice for later automatic or manual removal from the machine. The orifice is preferably located at the terminus of at least one of the radial projections such that it intersects the end portion thereof.