Abstract: A method of manufacturing a microfluidic device, said method comprising placing a length of material in a liquid polymer, configuring the length of material to define the path of a microfluidic channel, curing or setting the polymer liquid to form a solid polymer around the configured length of material, and dissolving the configured length of material with a solvent to provide a microfluidic channel in the solid polymer.

Abstract: This invention provides devices, systems, and methods for performing point-of-care, analysis, including multiplexed analysis, of a biological fluid analyte, such as blood. The invention includes a cartridge for collecting the biological fluid analyte. The cartridge is configured to be inserted into an assay reader, in which one or more assay reactions may be performed. The assay reader is designed to read and report the results of the one or more assay reactions.

Abstract: The invention is directed towards an Aerodynamic Automated Biological Assay Device (“AABAD”) comprising an aerodynamic substrate having a microfluidic cassette and an electronic module, and a system and a method of deploying the same to detect biological agents and hazards suspended in an atmosphere. The AABAD may be in the form/shape of a maple seed/fruit to induce autorotation. A plurality of AABADs are dispersed into the atmosphere from an aircraft or drone. The AABADs rotate via centrifugal forces without motor or active propulsion system while descending to the ground, wherein during the descent, the AABADs microfluidic cassettes collect and process the air samples via a centrifugal force formed from the autorotation generated by the airborne carrier, and to analyze and transmits the results to a remote location.

Abstract: A microfluidic device, including a controllable shape-changing micropillar where a shape of the shape-changing micropillar is changed by a fluid.

Abstract: Methods for separating cells from a sample (e.g., separating fetal red blood cells from maternal blood) include introducing a sample including cells into one or more microfluidic channels. In one embodiment, the device includes at least two processing steps. For example, a mixture of cells is introduced into a microfluidic channel that selectively allows the passage of a desired type of cell, and the population of cells enriched in the desired type is then introduced into a second microfluidic channel that allows the passage of the desired cell to produce a population of cells further enriched in the desired type. The selection of cells is based on a property of the cells in the mixture, for example, size, shape, deformability, surface characteristics (e.g., cell surface receptors or antigens and membrane permeability), or intracellular properties (e.g., expression of a particular enzyme).

Abstract: A microfluidic device includes: a first microfluidic channel; a second microfluidic channel extending along the first microfluidic channel; and a first array of islands separating the first microfluidic channel from the second microfluidic channel, in which each island is separated from an adjacent island in the array by an opening that fluidly couples the first microfluidic channel to the second microfluidic channel, in which the first microfluidic channel, the second microfluidic channel, and the islands are arranged so that a fluidic resistance of the first microfluidic channel increases relative to a fluidic resistance of the second microfluidic channel along a longitudinal direction of the first microfluidic channel such that, during use of the microfluidic device, a portion of a fluid sample flowing through the first microfluidic channel passes through one or more of the openings between adjacent islands into the second microfluidic channel.

Abstract: A method and device for transfecting a cell to introduce an exogenous material into the cell. The method includes exposing the cell to a region of unsteady flow in the presence of an electric field to encourage introduction of the exogenous material into a cell without lysing the cell.

Abstract: The present invention features the use of lateral cavity acoustic transducers (LCATs) to apply mechanical stimuli on cells. LCATs utilize the generated acoustic microstreaming vortices to trap cells and apply tunable shear-induced cell deformation on them. The present invention may use such a portable, automated, and high throughput device for shear-induced cell transfection.

Abstract: A system and method for isolating and analyzing single cells, comprising: a substrate having a broad surface; a set of wells defined at the broad surface of the substrate, and a set of channels, defined by the wall, that fluidly couple each well to at least one adjacent well in the set of wells; and fluid delivery module defining an inlet and comprising a plate, removably coupled to the substrate, the plate defining a recessed region fluidly connected to the inlet and facing the broad surface of the substrate, the fluid delivery module comprising a cell capture mode.

Abstract: A device for collecting, transferring and/or conserving samples of biological material, comprising at least: a support body having at least a housing seating for a conserving element for samples, the housing seating being configured for enabling removably housing the conserving element for samples of biological material, the support body being configured for maintaining at least a conserving portion of the conserving element accessible for depositing a sample when the conserving element is housed in the housing seating; an operating portion, movable between a first closed position in which it is arranged in proximity of said housing seating and at least an open position in which it is arranged in a distanced position from the housing seating; and engaging portion configured for selectively and removably engaging a sampling element for samples, in particular an element for buccal sampling, to the support body and/or to the operating portion.

Abstract: Plastic electrophoresis separation chips are provided comprising a plurality of microfluidic channels and a detection window, where the detection window comprises a thin plastic; and the detection window comprises a detection region of each microfluidic channel. Such chips can be bonded to a support provided an aperture is provided in the support to allow detection of samples in the electrophoresis chip at the thin plastic detection window. Further, methods for electrophoretically separating and detecting a plurality of samples on the plastic electrophoresis separation chip are described.

Abstract: A powder gathering apparatus includes at least two rotating plates and a driving mechanism. The at least two rotating plates are disposed with respect to each other. Each of the rotating plates includes at least one spherical member. The at least one spherical member protrudes from the rotating plate. The driving mechanism drives at least one of the at least two rotating plates to move, such that the at least two rotating plates get close to or away from each other. The driving mechanism drives the at least two rotating plates to rotate.

Abstract: A locking device for a crusher rotor of a horizontal shaft impact crusher includes a locking-wedge having a first through bore, a screw element for driving the locking-wedge into a locking position between a rotor arm and the hammer element and for holding the locking-wedge in the locking position, thereby fixing the hammer element to the rotor disc, a locking nut for receiving the locking screw element, and a locking nut holder. The screw element is at least partly located in the first through bore and extends through the locking nut. The locking nut holder holds the locking nut in a manner that prevents the locking nut from rotating as the screw element is driven through the locking nut.

Abstract: A ball mill liner assembly and installation method thereof; the ball mill liner assembly comprises wear-resistant liners (1), installation modules (3) and self-fixing liners (2); the self-fixing liners are made of ductile materials such as carbon steel or low-carbon alloy steel; the wear-resistant liners are integrally made of ceramic material; self-fixing liners are installed between a plurality of wear-resistant liners, and installation modules made of low-carbon alloy steel are used adjacent to the self-fixing liners.

Abstract: An automatic paper shredder with a staple removing structure and a staple removing method using the same. The automatic paper shredder includes a shredder cover, a paper holding box, a shell, a paper holding plate, a paper inlet, a paper shredding component, a drive motor, a paper pick-up component, a paper pressing plate, a straight through-hole, a waste paper bin and a staple removing component. The automatic paper shredder removes a staple (or clip) on a stack of paper through cooperation with a paper shredding structure. Paper can be automatically picked up in batches. Meanwhile, damage caused by staples to the whole shredder is prevented, and thus, the whole shredder is protected in use and has a longer service life.

Abstract: A protection device for tools for cutters and shredders and the like, arranged on a tool-holder seat for a tool-holder rotor rotatable about the axis of the rotor, said tool being housed in a seat arranged on the tool-bolder rotor, and formed by a first surface arranged at the front in the cutting direction and a second surface onto which the tool is fixed with its opposite surface to the cutting direction, the tool having a body that has a front surface in the rotation direction of the rotor, and a rear surface opposing the front surface. The tool and/or the seat having lateral projections and a protection device is dismountable connected to the seat of the tool, laterally as a protection for the tool and the plates being arranged partially between the lateral projections, of the tool and/or the seat of the tool, and the tool-holder rotor.

Abstract: An apparatus for remediation of a copper and nickel co-contaminated soil includes a housing. A crushing device is arranged at the upper part of the inside of the housing. A stirring device is arranged below the crushing device. An anode electrode and a cathode electrode are provided at both ends of the inner bottom of the housing, respectively. In the present invention, the soil contaminated by copper and nickel is first poured from the top of the crushing device, and then crushed thoroughly under the action of the crushing device. The crushed soil facilitates the movement of copper and nickel metal ions therein toward the electrodes under the action of the anode electrode and the cathode electrode, thereby achieving optimal soil remediation.

Abstract: One or more techniques and/or systems are disclosed for producing beneficial re-use sand from foundry sand. Foundry sand can be collected from a mold making operation, and/or from the casting removal and cleaning process. The collected sand product can be cleaned and separated into a clay and carbon mixture, and a beneficial re-use sand. The collected sand product can be cleaned by mixing with water, and subjecting the resulting mix to a hydrocyclone at appropriate flow rates. The hydrocyclone can separate the mix into a carbon, clay and water mix for re-use, and a wet sand mix. Water can be separated from the wet sand and reused, and the resulting sand can be used as beneficial re-use sand.

Abstract: An air cleaning system has a field charger comprising a plurality of bars comprising a conductive inner core and a non-conductive overmold, and a plurality of pins attached to the bars and extending out of the non-conductive overmold. The conductive inner core is molded over the plurality of pins, conductively connecting the pins, and the non-conductive overmold is molded over the conductive inner core. A method of manufacturing the field charger includes placing a plurality of metal pins in a mold, placing contact points in the mold, molding a conductive resin over at least a portion of the plurality of pins and contact points, molding an insulating resin over the inner core, plurality of pins, and contact points, wherein at least a portion of the pins and contact points extend from the non-conductive overmold, and mounting an earthplate to the conductive overmold.

Abstract: A dielectrophoresis-based in-droplet cell concentrator is disclosed herein. The concentrator can include a concentration microchannel having an input port and two or more outlet ports. The input port introduces cell-encapsulated droplets or particle-encapsulated droplets into the microchannel; a first outlet port receives droplets including most of the cells or particles and a second output port receives droplets including few cells or particles. The concentrator also can include a pair of electrodes. When voltage is applied, the electrodes will create an electric field across the microchannel. The concentrator adds new capabilities to droplet microfluidics operations, such as adjusting concentrations of cells in droplets, separating cells of different properties from inside droplets, and solution exchange.

Abstract: Fluid separation chambers are provided for rotation about an axis in a fluid processing system. The fluid separation chamber may be provided with first and second stages, with the first and second stages being positioned at different axial locations. In another embodiment, at least one of the stages may be provided with a non-uniform outer diameter about the rotational axis, which may define a generally spiral-shaped profile or a different profile for fractionating a fluid or fluid component. One or more of the stages may also have a varying outer diameter along the axis. The profile of the chamber may be provided by the chamber itself (in the case of rigid chambers) or by an associated fixture or centrifuge apparatus (in the case of flexible chambers).

Abstract: A method of supervising and controlling an E-line position in a centrifugal separator and a centrifugal separator include the E-line positon being continuously calculated based on inter alia, monitored density of light and heavy liquid phases, and monitored pressure at outlet side of light and/or heavy liquid outlet passages. First and/or second valves are controlled to control the E-line position, based on the supervised E-line position.

Abstract: A sanitary shower device including a shower body including a fluid inlet configuration, a jet disk and an interposed fluid guidance, wherein jet output elements of the jet disk each have a first and a second fluid input opening and discharge fluid supplied via the first fluid input openings as a first shower jet with a first jet pattern and fluid supplied via the second fluid input openings as a second shower jet with a second jet pattern differing from the first jet pattern, a fluid control device including a fluid outlet connection configuration and a user-operated fluid control unit, and a fluid conduit configuration for fluid coupling of the fluid inlet configuration to the fluid outlet connection configuration.

Abstract: A nozzle device and method for creating a fluid nucleation in situ, is disclosed. The nozzle has a housing having a hollow interior, an outer cylindrical wall, and inlet and an outlet, and a diffuser disposed in the cylindrical tube at a first end toward the inlet. The diffuser is configured to break bonds between adjoining fluid molecules and create a nucleation event. The nozzle further has a mesh framework disposed in the cylindrical tube and extending longitudinally within the tube in the nucleation zone, and is configured to manipulate the bonding and un-bonding of water molecules within a pressurized environment for the production of snow, clean water or both.

Abstract: A sprayer includes a spray gun and a hopper. An air source provides compressed air to the sprayer to both eject fluid from the spray gun as a spray and to pressurize the hopper. The spray gun includes an airflow controller for controlling the flow of the compressed air to a nozzle of the spray gun, a pressure regulator for regulating a pressure of the compressed air flowing to the hopper, and a relief valve between the pressure regulator and the hopper. The hopper receives the compressed air through a port in the hopper, and the compressed air assists the flow of material out of the hopper and into the spray gun.

Abstract: A remote trigger head for dispensing a liquid includes a rewindable tube (2) having a predefined length and a winder unit (70) for the automatic spring rewinding of the tube (2).

Abstract: Some embodiments are directed to a valve, including a rigid end piece that defines a center; a rod at the center of the end piece defining an axis; and a flap, wherein the flap is in one piece and has a flexible wall situated opposite a free end of the rod, the flexible wall is perforated by an orifice concentric with the end of the rod, the orifice has a contour substantially homothetic with that of the contour of the end of the rod in a plane perpendicular to the axis of the rod, the orifice has a surface below a projected surface of the end of the rod in the plane, the flap is connected to the end piece by a non-deformable fixed connection, and the flexible wall presses against the end of the rod at any point of its surface in contact with the end.

Abstract: Embodiments include a bottle and method for cleaning a grill. An exemplary method may be applied to grills having an upper grill and a lower grill. Methods can include providing a bottle having a dosing chamber with a first outlet, a reservoir chamber configured to store a solution and including a second outlet, and a sprayer for dispensing solution via the second outlet. The sprayer includes a spray head and a trigger that, when actuated, draws solution from the reservoir chamber and dispenses it by spraying the solution from the spray head. Methods can include filing the dosing chamber with a predetermined dose of solution from the reservoir chamber and dispensing the solution onto the lower grill from the first outlet, and dispensing the solution onto the upper grill by spraying the solution onto the upper grill from the second outlet.

Abstract: A dosing dispenser for dosing of at least one material component respectively received in a receiving compartment. In a dosing dispenser for the discharge of material components that has a double-walled structure of the pump unit, a ventilation path is provided leading from the outer environment to the receiving compartment through the pump unit.

Abstract: A cleaning apparatus for cleaning a nozzle of a liquid dispensing device is disclosed. The cleaning apparatus includes a base member supporting a receiving head including a receiving opening for receiving a portion of the nozzle to be cleaned, a gas inlet for receiving pressurized gas, and an outlet at the receiving head for applying pressurized gas to the nozzle for flushing the nozzle. The receiving opening can include a sealing edge for sealing the receiving head against the nozzle when the nozzle is received in the receiving opening. The cleaning apparatus can also include at least one of a discharge tube, a collection vessel and a filter element.

Abstract: A spray gun adapter establishes fluid communication between a fluid pump of a handheld airless spray gun and an applicator accessory. The adapter comprises an adapter body, a head attached to the adapter body, and a protrusion. The adapter body comprises an upper portion, a lower portion, a radial inlet located in a sidewall of the adapter body between the upper and lower portions, and an adapter bore having a first diameter in fluid communication with the radial inlet. The head attached to the adapter body is attached at the upper portion of the adapter body. The head comprises a cavity in fluid communication with the adapter bore and having a second diameter larger than the first diameter, an adapter outlet located in the upper portion of the adapter body and in fluid communication with the cavity, and a handle extending radially from the head. The protrusion extends radially from the adapter body between the upper portion and the lower portion of the adapter body.

Abstract: Described is a device (10) for applying an adhesive (C). The device (10) comprises at least one rotary gluing member (21, 31) designed to transfer to a mass of adhesive (C) towards a surface to be glued (S) and a plurality of rotating distributor members (51a-g) susceptible to being interposed, in operation, between the gluing members (21, 31) and the surface to be glued (S). The plurality of distributor members (51a-g) comprises a first portion of distributor members (51b, 51d, 51f) susceptible to make contact with the gluing member (21, 31) and a second portion of distributor members (51a, 51c, 51e, 51g) susceptible to remaining spaced from the gluing member (21, 31).

Abstract: Apparatus and method are described and useful for, among other things, providing a layer by layer coating of materials on a belt. A directional gas curtain producing element is used to provide a gas curtain blowing on the belt in an upstream direction that simultaneously meters liquid from the belt and dries the belt.

Abstract: The present disclosure provides a glue-saving mechanism, a glue gun handle, a glue gun and a use method thereof, and relates to the technical field of gluing tools, wherein the glue-saving mechanism is applicable to the glue gun and includes a body and a locking piece; a top end of the locking piece is connected with a rear end of the body, the locking piece is provided with a assembling hole for glue gun ejector rod penetrating the locking piece, and the angle between a front surface of the locking piece and the horizontal direction is greater than 0° and smaller than 90° when a length extension direction of a glue gun ejector rod in a working condition that the glue gun ejector rod is assembled to the glue gun is regarded as a horizontal direction; a guiding structure is provided on the body, and the guiding structure is used for guiding the body to slide forward and backward relative to a glue gun handle in a working condition that the glue-saving mechanism is assembled at a top end of the glue gun handle;

Abstract: An electronic component manufacturing method includes a blotting process of bringing a conductive paste applied to an end portion of each electronic component body held by a jig into contact with a surface of a surface plate. The blotting process includes simultaneous performance of a distance changing process of changing the distance between an end face of each electronic component body and the surface of the surface plate and a position changing process of changing a two-dimensional position where the end face of the electronic component body is projected on the surface of the surface plate in such a manner that the direction of the movement of two-dimensional position in parallel to the surface of the surface plate successively varies (e.g., along a circular path).

Abstract: A device for applying UV radiation to substrates in a field of application. The device includes: a radiation source, which emits both UV radiation and visible light and infrared radiation in a spatial angle; and a radiation-selective deflecting mirror, which mostly reflects the UV radiation and mostly transmits the VIS and IR radiation. The deflecting mirror includes at least two flat mirror strips, which are tilted with respect to each other.

Abstract: A paint trencher includes a main body, an abrasive body, and a handle. The main body includes a top panel, a bottom panel, and a support. The abrasive body, preferably a beveled-elongated body, is adjacently mounted to the support in order to cut into the wall. The handle is mounted to the top panel so that applied pressure of the main body can be transferred into the abrasive body thus cutting a trench into the wall. A felt pad is perimetrically attached around the bottom panel so that the surrounding wall area of the trench can be protected from unnecessary scratches.

Abstract: An ultrasonic probe includes: an acoustic element that generates an ultrasonic wave and detects the ultrasonic wave; a support that supports the acoustic element on a side opposite to a test object side; and a heat dissipation material disposed on a side of the support opposite to the acoustic element, wherein an attenuation/thermal conduction material made of an attenuating material containing a thermally conductive material is disposed in contact with the heat dissipation material.

Abstract: An apparatus that generates vibrational motion is disclosed. The apparatus includes a first mass, a second mass, a drive system, and a control system. The first mass is eccentrically mounted on, and configured to rotate about, a first shaft. The second mass is eccentrically mounted on, and configured to rotate about, a second shaft, with first and second shafts sharing a common axis. The drive system imparts rotational motion to first and second shafts, and the control system controls rotational frequencies, directions, and initial angles of the first and second masses. Linear, elliptical, or circular vibratory motion of the apparatus may be induced by controlling such rotational properties of the first and second masses. The apparatus may include a measurement device that measures angular position and/or velocity of the first and second masses. The control system may control the vibrational motion based on measurements taken by the measurement device.

Abstract: Disclosed embodiments include a removable support structure for a vibratory screening machine. The removable support structure is a single structure including one or more of plastic, metal, and composite materials and may be configured to provide mechanical support to one or more screening assemblies of the vibratory screening machine. The removable support structure may further be configured to be removably fastened to the vibratory screening machine. The removable support structure may be a single thermoplastic injection molded piece or may be a single injection molded piece that includes nylon, carbon, and graphite. The removable support structure may have a concave shape that is configured to mechanically support a screening assembly held under compression or may have a convex shape that is configured to mechanically support a screening assembly held under tension. A disclosed wear protective covering, made of a flexible material, provides wear protection to the removable support structure.

Abstract: A method of installing a vibratory shaker screen in a vibratory shaker, including placing a first end of the vibratory shaker screen in a retainer, wherein the retainer is a component of the vibratory shaker; pivoting a second end of the vibratory shaker screen toward a screen installation position on the vibratory shaker, deflecting a tab on one of the vibratory shaker screen and the vibratory shaker through contact of the vibratory shaker screen to another retainer of the vibratory shaker, and connecting the vibratory shaker screen to the vibratory shaker, where the tab fixedly connects the vibratory shaker screen to the vibratory shaker.

Abstract: Disclosed herein is a particle separation apparatus. The particle separation apparatus includes: a bioreactor; a first flow path through which the sludge is discharged from the bioreactor; a first filter including a first mesh separating the granular microorganisms contained in the sludge according to size; a second flow path into which an effluent having passed through the first filter flows; a third flow path connected to the second flow path to discharge the effluent outside; a fourth flow path connected to one side of the second flow path and mounted on a surface of the first filter connected to a surface of the first filter with the second flow path mounted thereon; a fifth flow path through which the effluent having been discharged from the fourth flow path and passed through the first filter flows into the bioreactor; and a first pump creating a flow of the effluent.

Abstract: A parcel or packet sorting installation comprising a bin conveyor having bins (4) that are designed to convey the parcels in series in a certain conveying direction over a plurality of sorting outlets, and a parcel injector designed to inject one parcel per bin, said sorting conveyor being designed to sort the parcels into the sorting outlets from the bins as a function of sorting information affixed to each of the parcels. Each bin comprises two side walls (9) and a floor (10) mounted to pivot between the two side walls, and a flap (11) mounted to pivot at an upstream end of the floor relative to the conveying direction.

Abstract: The present technology relates to various cleaning compositions and their methods of use in industrial facilities such as ethanol and biofuel producing vessels. Cleaning compositions according to the present technology may be Generally Recognized As Safe (GRAS) as designated by the U.S. Food and Drug Administration (FDA). The cleaning compositions of the present technology may effectively remove biofilm buildup and/or spent grain residue from industrial fermentation vessels and associated apparatus. Various embodiments of the cleaning composition may comprise various surfactants, chelators, acids, bases, and/or defoamers. Some embodiments of the cleaning composition may comprise a gluconate, a glucoside, a strong acid or base, and/or a defoamer.

Abstract: A first SPM, prepared by mixing sulfuric acid and hydrogen peroxide water at a first mixing ratio, is supplied to a substrate. A second SPM, prepared by mixing the sulfuric acid and the hydrogen peroxide water at a second mixing ratio greater than the first mixing ratio, is supplied to the substrate after the supply of the first SPM is stopped. The first SPM expelled from the substrate flows into a drain piping. The second SPM expelled from the substrate flows into a recovery piping. SPM is prepared by mixing the hydrogen peroxide water with sulfuric acid contained in the second SPM guided by the recovery piping.

Abstract: An ultrasonic cleaning equipment (1) according to the present invention includes a treatment tank (10) that stores a cleaning liquid that cleans an object to be cleaned and in which the object to be cleaned is immersed; an ultrasonic application mechanism (20) that applies ultrasonic waves to the cleaning liquid retained in an interior of the treatment tank; and a curved surface member (30) that is located in a range defined by an angle of inclination from a perpendicular direction in an end portion of a vibrating surface of the ultrasonic application mechanism to an outside with respect to the vibrating surface and that is held on a wall surface and/or a bottom surface of the treatment tank.

Abstract: A positive air pressure system resists debris accumulation on an active surface and comprises a frustum-shaped shroud with a baffle plate therein dividing the shroud into baffles, including a positive pressure chamber and a passive back pressure chamber interconnected through an orifice in the baffle plate. An inlet opening is formed in the shroud and in fluid communication with the proximal baffle and a positive pressure air source and to receive air through the inlet opening from the positive pressure air source and create a high-pressure region, greater than a pressure region in the passive back pressure chamber, and in front of the active surface and to expel air out of the positive pressure chamber and into the passive back pressure chamber through the orifice in the baffle plate.

Abstract: A way of using narrowband irradiation to de-ice or release ice from a surface is provided. The methodology can be applied to a range of different types of de-icing from windshield de-icing to aircraft wing de-icing to releasing ice from the ice tray of an ice making machine. While there are many different specific applications, the concept and methodologies taught remain similar across all of them.

Abstract: A laser cleaning apparatus and a laser cleaning method are furnished, for switching the wavelengths of laser beams furnished by a single laser module using a wavelength switching module and cleaning a test piece using the laser beams having wavelengths and energy suitable for manufacturing needs. The laser cleaning method includes: creating a laser beam; switching the wavelength output by the laser based on process requirements; propagating the laser beam via an optical path propagating module for laser cleaning the test piece; and removing debris. A transfer platform allows movements of the laser beams with respect to the test piece to achieve cleaning of the entire test piece. A control module controls the wavelength switching unit, the laser beam regulating module, and the transfer platform. Total laser cleaning with improved laser cleaning quality is achieved by using these laser beams with the appropriate wavelengths and energy.

Abstract: A nozzle for water jet equipment and a method of use thereof. The nozzle has a body including a base with a shaft extending outwardly therefrom. The shaft is inserted through a bore of a sleeve that rotatable about the shaft. The base and shaft define a bore therein. At least one opening is defined in the shaft and one or more grooves are milled into the shaft's exterior surface. Each opening places the body's bore in fluid communication with one of the grooves and the sleeve's bore. Water flowing through the body's bore will flow through each opening, into the associated groove and into a space between the shaft and sleeve. The grooves create turbulence in water in this space and thereby reduce leakage from the nozzle. The shaft terminates in a conical section usable as a battering ram to break up blockages in pipes during cleaning operations.