Abstract: A conveyor scraper for use in an apparatus for separating cake from liquid is disclosed. The apparatus comprises a reservoir for holding cake containing liquid and a continuous conveyor inclined upward from a surface of the liquid. A plurality of outward extending scrapers are movable with the conveyor and engage are inclined wall spaced below and parallel to the conveyor to move the cake along the wall. The scraper is pivotably mounted to the conveyor to permit the scraper to pivot upon encountering an obstruction to avoid stalling or otherwise damaging the conveyor. The scraper is biased into engagement with the inclined wall permitting movement of the scraper toward the wall as wear occurs.

Abstract: With a screen disposed in a flowing waterstream of sewage and other waste materials to intercept objects such as rags, plastic, wood, metal, fragments of masonry and the like, such objects are removed from the screen by a reciprocating mechanical rake to a point of disposal or further treatment. Elongated rods secured at one end to the rake are pivotally connected at the other end to a power driven endless chain for travel therewith towards and away from the screen with such chain and power supply being remotely located at a point free of contact with the waterstream.

Abstract: The present invention relates to an expansion and contraction system of a plurality of arms, and for example to an expansion and contraction system applicable to a rake arm of a dirt remover for discharging dust from the effluent of an aqueduct.

Abstract: An apparatus for separating pigment containing cake from a vehicle such as water is disclosed. The apparatus comprises a skimmer which includes a reservoir for containing the cake containing vehicle and a continuous conveyor belt inclined upward from a surface of the cake containing vehicle. In a preferred embodiment a plurality of upward extending walls are attached to the conveyor belt for skimming the cake from the vehicle. An inclined wall is disposed parallel to a space below the belt to slidingly engage the outward extending walls as they move therepast. A lower portion of the inclined wall is positioned over the reservoir, and an upper portion of the inclined wall extends outward from the reservoir, with the lower portion of the inclined wall perforated to allow vehicle to drain from the cake into the reservoir thus separating the cake and the vehicle. A discharge opening formed at an upper end of the inclined wall allows the separated cake to be discharged into a receptacle for collection.

Abstract: The specification discloses a bar screen in combination with apparatus adapted to clean the same by inserting a rake between the bar screen and moving the rake upward. The bar screen comprises a plurality of bar members each having a base component adapted for securement to the bed of the waste waterway and an upright component integrally attached to the base component to form an approximate "L" shaped bar member. The bar members are sized and spaced apart with the base component extending upstream to provide a protected area free of large debris for insertion of the rake means in preparation for the cleaning operation. Such a combination minimizes the possibility of rake damage and increases the cleaning efficiency of the unit.

Abstract: A weed screen and trash eliminator for irrigation systems utilizing open ditches or canals for transmission of water. A rigid frame supports a stationary screen having a planar surface. A front trough directs water within a ditch onto the upper screen surface, which is inclined slightly from its front edge to its rear edge. The water passes through the screen, leaving weeds and other debris on the upper screen surface. Endless conveyors continuously move a transverse bristle brush along working flights that span the length of the screen. The conveyors are powered continuously in a direction such that the brush moves along the screen from front to back. A recessed catch pan is fixed across the frame immediately adjacent the rear edge of the screen to receive materials swept from the screen by the brush.

Abstract: A mechanically raked bar screen, particularly for use in screening sewage, which comprises an array of screen bars in side-by-side, spaced-apart relationship, each bar being removably mounted on bar mountings and preferably so mounted that each bar can move towards or away from adjacent bars.

Abstract: The raking machine is designed with two telescopical tube members, forming the rake arm, and with block means in combination with a hydraulic cylinder, controlling its displacement in and out.The block means comprises block discs attached to the upper end of the outer part of the tube and a block disc displaceably attached to the upper end of the inner part of the tube and a wire running on these block discs.The angle of the raking machine and the trashrack is controlled by a hydraulic cylinder.

Abstract: The invention provides a device for automatic cleaning of trashracks. The device comprises a rake arm upheld by a support which is movable sideways in parallel with the trashrack. A wedge-shaped rake is pivotally mounted at the lower end of the rake arm, which by drive means is moved downwards and upwards along the trashrack, the rake thereby engaging the trashrack. During the downward movement the rake engages the trashrack only with its lower edge at which means are arranged striving to pivot the rake towards the trashrack. During the upward movement the rake is pressed against the trashrack with the whole end surface facing the trashrack.

Abstract: A screen disposed in an elongated sewage channel is cleaned by the movement f a screen comb along the vertically disposed, spaced apart bars of the screen from the bottom to the top. The screen comb is pivotally attached to the end of a rake arm which is formed of a single elongated element. The opposite end of the rake arm is pivotally attached to one end of a support arm (which support arm is pivotally attached at its opposite end to a fixed supporting structure). At a point along the length of the rake arm it is pivotally attached, by way of a laterally extending pin, to a single endless chain moving along a single guide track. Thus, the rake arm is supported in cantilever fashion from the guide track. A supporting roll around the laterally extending pin at a point supported by the guide track allows the pin (as well as the rake arm) to be moved by the endless chain along the guide track.

Abstract: This invention relates to an improved ditch water cleaning apparatus characterized by a partially covered open ended frame for insertion in the ditch, an upwardly and rearwardly inclined screen at the upstream end of the frame effective to interrupt the flow of water within the ditch and screen the debris therefrom, a propeller-like brush journalled for rotation about an axis normal to the plane of the screen and so located relative thereto that each arm of the brush successively sweeps the surface of the latter and removes any debris therefrom onto the covered portion of the frame lying immediately therebehind, and brush drive means operatively connected to the brush. The unit also includes a novel comb to pick the debris from the brush bristles preparatory to its moving onto the screen.

Abstract: A pair of screens are arranged one behind the other and served by a common cleaning rake for the removal of the screenings from both screens in a single operating step.

Abstract: A water intake device comprising a substantially cylindrical rotatable screen adapted to be at least partially submerged in a body of water, means for rotating said screen, a water supply conduit communicating with the interior of said screen to receive water flowing through said screen, means for backwashing a section of said screen as said screen moves by said backwashing means so as to clear and/or remove objects or fish caught on the exterior surface of said screen and duct means associated with said backwashing means to provide or define a flow channel or path to guide and/or carry the objects or fish away from the influence or suction of the water entering said screen to said water supply conduit.

Abstract: The invention relates to a trashrack installation for liquid borne trash, the installation having trash collecting rack rods and a rack cleaner mechanism for cleaning the rack rods and which includes a toothed comb mounted on a tilting mechanism and pivotable between a cleaning position and a free position. The tilting mechanism is mounted pivotably on a carrier which can be moved by means of a conveyor mechanism along a guiding device, tilting of the tilting mechanism relative to the carrier being actuated by movement of the conveyor mechanism and the guiding device being arranged remote from the rack rods through which the liquid flows. The carrier includes a brake mechanism, the braking force of which is sufficient to prevent movement of the carrier under gravity, but which is insufficient to prevent the conveyor mechanism moving the carrier either in a direction for cleaning or in a return direction.

Abstract: An endless belt conveyor for collecting floating matter, particularly highly viscous oil lumps from the water surface is disclosed. The endless belt conveyor extends between a pair of pulleys, one of which being located above water level and the other pulley being located beneath water level, and comprises (1) a pair of driving bands located at widthwise ends of the conveyor, (2) a plurality of connection plates fixed to the driving bands at a given interval, (3) a plurality of projections provided outwardly on the upper surface of each connection plate, (4) a plurality of sleeves provided on the lower surface of each connection plate, and (5) a plurality of flexible ropes passing through the sleeves and extending between the pulleys.

Abstract: An apparatus and method are provided for handling the problem of crud formation in solvent extraction equipment. "Crud" is the name commonly given to the thick interfacial layer of semi-floatable material that accumulates and interferes with many solvent extraction operations.The apparatus disclosed is used in combination with mixer-settler equipment, and it includes a rotatable shaft, a blade mounted on the shaft, apparatus for moving the shaft and blade across a plane parallel to the surface of the liquid inside a rectangular settler vessel, equipment for rotating the blade and shaft about the shaft's longitudinal axis, and a locking device for locking the blade into an extended or retracted position.

Abstract: A cleaning method of an etched disc filter and the system therefor, in which a plurality of discs having grooved surfaces are assembled or piled one on top of another. This filter is used for removing cruds and the like in a nuclear plant. For separating cruds and the like from small flow passages provided between each two of the discs thus assembled, reverse cleaning is applied, with the discs relieved from an assembled or piled condition for providing clearances among the discs.

Abstract: A device for cleaning of a screen located in a water conduit is provided h a screen rake which has a screen comb at one end thereof, the screen rake being mounted and driven by a chain to be guided in a path such that the screen comb cleans the screen, deposits the screenings in a bin and returns to clean the screen again in a continuous and non-interrupted fashion. The path is formed by a number of connected angle bars which are curved in shape and which are placed between a number of chain wheels around which the chain is wrapped for movement thereover. The screen rake is pivotably connected at the end opposite to the screen comb to the end of a hinged support, the hinged support being pivoted around a stationary bearing and having a counterweight at the other end thereof.

Abstract: Apparatus for removing solid material from a flow of sewage or other liquid, the apparatus having a duct through which in use sewage will flow and two screens located in said duct adjacent to each other, one of said screens being arranged to receive solid material filtered from the sewage flow by the other screen and there being also provided a vertically reciprocable lifting plate which is adapted to collect solid material from said one screen and lift it to a position which is above the upper surface of the flow of sewage.

Abstract: A liquid expulsion device having a tank enclosing a flexible bladder containing liquid to be expelled and an insoluble gas. Prior to expulsion the combined liquid and gas volume remains constant so that during environmental changes the bladder is forced into intimate flush contact with the tank and is incapable of flexing and becoming ruptured. Liquid is expelled through a surface tension screen that blocks passage of the gas.