Abstract: A sewer cleaning device having an inlet nozzle assembly at one end for securing to a sewer jet and a sealed nozzle assembly oppositely disposed therefrom with water flowing from the sewer jet through each nozzle assembly and cables secured to a central housing between the nozzle assembly provides for a scraping and water jet action to clean a sewer pipe thoroughly.

Abstract: A method for the fluid treatment of semiconductor wafers includes a treatment vessel having opposed first and second ports, and means for holding wafers in a flow path therebetween. A flow segment comprising in sequence, a first vent, a first valve, an inlet, a second valve and a second vent extends between the first and the second port so as to constitute, together with the vessel, a closed fluid loop.Preferably, the first and second ports are top and bottom ports, with a flow path extending vertically therebetween. The loop is maintained hydraulically full, whereby filling the vessel with a treatment fluid at the inlet, flushes a preceding treatment fluid from the system. A sequence of treatment fluids of differing densities may be provided at the inlet, and a vent and a valve are controlled to fill the loop from the bottom, in the event the treatment fluid is denser than the preceding fluid, or from the top, in the event the fluid is lighter than the preceding fluid.

Abstract: A flushing and recharging system for an automotive engine includes a tee branch inserted in the coolant return hose from the cylinder block of an engine to the radiator, and which is employed to flush and recharge the cooling system with coolant fluid, provision being made for reversing the fluid flow through the return hose, the supply of scavening water optionally being a flow pulsating in pressure and velocity. The waste coolant scavenged from the cooling system is separated out to remove particulate matter and to separate petroleum products from the water base of the coolant fluid.

Abstract: Cleaning, activating and metallizing of bore holes in conductor boards is performed by supplying a liquid treatment medium in form a standing wave onto a lower side of the conductor board by a surge line which is formed as a nozzle arranged under a transporting path and substantially normal to a transporting direction of the horizontally guided conductor board.

Abstract: A method for cleaning keyboards having Hall-effect, plunger-type keys that comprises the steps of immersing the keyboard in a mild detergent bath, subjecting this bath to ultrasonic vibrations, removing the keyboard from this bath, rinsing the detergent solution from the keyboard, and drying the keyboard by immersing said keyboard in a fluorinated solvent or baking said keyboard in a low temperature oven.

Abstract: A method for cleaning the net bag for breeding enclosures, seines, and the like utilizes a rotatable driven drum, known per se, with an insert opening for the net bag and radial inward projecting ridges, as well as an inlet and outlet for washing and rinsing water. Said inlet for water continuously supplies water during the entire period of operation, and the outlet is continuously open during the entire period of operation. The inlet for water consists of axially directed openings or nozzles which may be arranged in a cross-shaped pattern with their point of intersection in the center of said drum. The outlet consists of a number of axial open slots in the drum shell. The water pressure in and the area of said inlet openings are adapted to the area of the outlets in such a manner that the drum is approximately free for water during operation. The height of each ridge constitutes at least 10% of the drum diameter.

Abstract: There is provided a method for cleaning corrugated filter elements by means of suction nozzles. The method comprises a corrugated filter element and at least one suction nozzle movable relative to the surface of the element. The specific parameters of the method are interrelated in accordance with a specially developed given formula.

Abstract: Contamination of wafers is reduced by an enclosed full-flow method and apparatus for the cleaning and other wet processing of semiconductor wafers. Process fluids flow sequentially and continuously past the wafers such that the processing does not require movement or operator handling of the wafers between processing steps. The vessel containing the wafers is hydraulically full during each process step. Wafers may be cleaned using a hot corrosive fluid, such as sulfuric acid; rinsed using high purity water at high flow rates; and dried using a drying fluid such an isopropanol. In addition, chemical reagents such as dilute hydrofluoric acid or hydrogen peroxide may be precisely mixed in situ and applied to the wafer surface for a precisely controlled period, by injecting concentrated reagent into rinse water purified by multipass filtration.

Abstract: A machine is provided for rinsing eating utensils and includes a rinse station wherein the utensils are finally rinsed to eliminate spotting thereon. The water used in the final rinse of the utensils is of high quality and contains less than 275 ppm of total dissolved solids. The high quality rinse water is collected in a tank having a heating element therein and pumped to the rinse station after being heated. After each rinse cycle, the water drains back into the tank where it is reheated and recirculated to rinse each additional group of utensils subsequently introduced into the second station until the level of total dissolved solids in the water exceeds 275 ppm.The method of rinsing eating utensils comprises moving the utensils through a rinse station where they are finally rinsed with a heated quantity of high quality water having less than 275 ppm of total dissolved solids.

Abstract: The invention relates to a method and a device of cleaning a soldering iron having melted solder attached thereto in which the method includes sticking the soldering iron into irregularly entangled strip elements which may be continuous, heatproof and elastic, and axially reciprocating the soldering iron in the entangled strip elements to scrape the melted solder off the soldering iron by means of the edges of the strip elements, whereby the scraped-off melted solder drops from the soldering iron as these are cooled and hardened by the strip elements.

Abstract: A system and process for removing hazardous or toxic particulate materials from surfaces includes all components necessary for safe removal of the material in a van body that can be moved easily from one site to another. The system includes mechanism for sealing of selected areas, with tubing connecting the selected sealed areas to a separator chamber in the van body. Air pressure is lowered within the sealed enclosed area and airflow is maintained through the tube to the separator chamber. Fluidic carrier jets may also be directed within the tube toward the separator chamber. Particulate materials can be removed from the surface within the enclosure and deposited into the tube where it flows in an air and fluid carrier stream to the separator chamber. There, larger particulates are allowed to drop into a collection tank. Remaining particulate materials are filtered by a high efficiency particulate absolute filter until the air is safe to be discharged into the atmosphere.

Abstract: Metal leads are prepared for solder dipping by first exposing the leads to a fifty percent solution of sulfuric acid. The leads are then rinsed using city water and exposed to solution consisting of fifty percent sulfuric acid, twenty-five percent nitric acid and twenty-five percent deionized water. The leads are then rinsed sequentially in city water and deionized water. Finally, excess water is removed from the leads.

Abstract: A method utilizing a portable hydraulic apparatus for cleaning the hydrocarbon contaminated sludge deposit of an oil storage tank with a fluidizing agent, the tank having a floor, a side wall and a passageway through the side wall positioned adjacent the floor of the tank, comprises a frame having a central portion and first and second end portions. The frame is configured and dimensioned to pass through the passageway. A pair of independently movable endless chain belts are position on opposite sides of the frame for selectively moving the frame within the oil storage tank to selected locations. A hydraulic line coupled to the central portion of the frame discharges the fluidizing agent onto an adjacent first portion of the sludge deposit so as to form a pool of sludge and fluidizing agent. A suction pump is positioned on the central portion of the frame for drawing up the pool of sludge and fluidizing agent.

Abstract: An ice/snow scraping apparatus and method characterized by an edge-illuminated, light transmitting scraping blade which provides illumination for the interior and scraping edge of a blade, thereby illuminating at least a portion of an area to be scraped from the blade illumination phenomena.

Abstract: A method for removing excess solder from a printed circuit board is practiced by mixing a quantity of ceramic beads with an oil to form a fluidized bed mixture. The fluidized bed mixture is heated to a temperature above the melting point of a solder on the printed circuit board. A surface of the printed circuit board to be cleaned is placed in contact with the heated fluidized bed and agitated against the bed to remove excess solder.

Abstract: A powder coating booth has a bottom surface on which powder is collected and from which the powder should be removed. Two scrapers are supported on a transport device which move them together. Each scraper is movable from its respective end of the booth toward a central collection region. Since the scrapers are moved simultaneously, one is moving toward the collection region while the other is moving away. As a scraper moves toward the central collection region, it scrapes powder from the surface and delivers it to the collection region. Each scraper swings into an operating, surface scraping position as it moves from its respective end of the booth toward the collection region, and swings into an upraised, non-scraping position, as each moves from the collection region back to the end region. A cable with scraper engaging flights on it is movable for engaging the scrapers and for moving and for swinging them.

Abstract: The spaces into which the vessel is divided by means of horizontal perforated partions are successively cleaned from top to bottom. Firstly the uppermost space is cleaned: the cover of the access to the space is removed, through the access a high-pressure lance is equipped with a spray head comprising a body rotatable about the lance axis and spray arms rotatably mounted on said body and liquid is sprayed with a pressure lying between 35 and 50 MPa. Then the middle space is cleaned: the cover of the access to the space is removed, through the access a high-pressure lance is equipped with a fixed spray head provided with spray openings directed in various directions and liquid is sprayed with a pressure lying between 50 to 70 MPa. Finally the lowermost space is cleaned in the same way as the uppermost space. The cleaning liquid is discharged through the outlet in the vessel bottom.

Abstract: A method of removing a gasket seal from a window glazing panel which includes immersing the panel and seal in non-volatile fluid. The glass and/or fluid is heated to soften the seal prior to removing the seal from the panel.

Abstract: Cold trap for purifying liquid sodium containing impurities of the type comprising, in a sealed enclosure cooled by a cooling fluid flowing in contact with its outer surface, in the upper part an economizer for lowering the temperature of the hot sodium and ensuring its introduction into the trap, and in the lower part the actual trap containing a filter plug, kept at its cold point temperature, wherein the enclosure is annular, the filter plug being located in the space between two concentric cylindrical ferrules.

Abstract: A method is described for blast cleaning paint and other adhesive coatings from composite surfaces formed of a reinforced matrix material. A special soft media is used at a relatively low pressure to prevent damage to the soft composite material. The preferred method calls for the use of a media having a Mohs scale hardness number of 3.0 or less. The media is pressurized to approximately 40 p.s.i. and directed at the composite surface to be cleaned. A method of optimizing the cleaning action is also described.