Abstract: A mechanical screen employs at least one filter chamber which includes a chassis in the form of a frame and a filter panel disposed transversely in the opening of the chassis and appropriately attached to it. Clipping elements between the filter panel and the chassis are used to attach the filter panel to the chassis. The filter panel, the uprights of the chassis and its longitudinal members are preferably made from materials inert to corrosion. Applications include chain filters.

Abstract: A filter includes, in a filter body, a filter unit in the general form of a wheel with, for local contraflow circulation of a cleaning fluid through its filter element, a circulation unit to which a pipe is connected. The pipe is an inlet pipe of the cleaning fluid and, on the other side of the filter unit to the circulation unit there is locally interposed in the filter body an interceptor plate, with, connected laterally to the filter body, between the filter element of the filter unit and the interceptor plate, a pipe which is an outlet pipe for the cleaning fluid. Applications include heat exchangers in which solid cleaning elements circulate, for retaining and recycling the latter.

Abstract: A recovery device comprising a sleeve (21) arranged in the outlet (15S) of a heat exchanger (10) and containing a filter assembly (24) capable of retaining solid cleaning materials (18) circulating through the heat exchanger. The filter assembly (24) comprises a rotary member (25) with a filter panel (26) and two interconnected pipes (27S, 27E) arranged on either side of the rotary member (25) in connection with the relative rotation thereof, as well as a circulation assembly for locally generating a counter-flow through the filter panel (26) of the rotary member (25) opposite the pipes (27S, 27E). The device is particularly useful in tubular heat exchangers used in condensers.

Abstract: A water intake comprises a common frame and assembled thereto and-forming therewith an integral self-contained unit a pump adapted to be immersed and a trash rake and an associated grid on the suction side of the pump and/or a filter on the discharge side of the pump.

Abstract: A filter panel comprises a plurality of substantially coplanar openings. It incorporates a two-dimensional array of parallel elongate passages. Each passage delimits a respective one of the openings. The array is substantially coplanar with the openings and the passages are substantially perpendicular to the array. Each opening is convergent from an interior profile both from the inlet and outlet side of the panel.

Abstract: A filter that can be inserted into a pressurized pipe comprises a filter body designed to be connected to each of two consecutive section of the pipe. Inside the filter body is a generally circular filter member which is rotatable about an axis of the filter body, into which it projects cantilever-fashion. A rim on the filter member carries a rack meshing with a drive wheel. A suction unit on the upstream side of the filter member and disposed along a radius of the filter member is connected to a take-off pipe.

Abstract: A filter without moving parts comprises a filter body adapted to be fitted in the flow direction into a conduit conveying a fluid to be filtered. A filter screen has a frustoconical outer filter wall with at least part of its larger diameter end inside the filter body. A collection space inside the filter body surrounds the filter screen. At least one offtake conduit is connected to this collection space. An inner filter wall of the filter screen extends at least partly into the outer filter wall from its smaller diameter end. A back wall intersects the inner filter wall and a further collection space is delimited by the inner filter wall and this back wall at the end of this inner filter wall farthest removed from the smaller diameter end of the outer filter wall. A further, separate offtake conduit is connected to the further collection space and passes substantially radially through the inner filter wall and the outer filter wall of the filter screen.

Abstract: Industrial water filter comprising a filter housing comprising a sidewall and opposed endwalls, a radial inlet and an axial outlet. A stationary filter is disposed operatively between the inlet and outlet and generally eccentrically relative to the inlet axis so as to produce a sweeping flow pattern along the screen. The interior space between the screen and housing is divided diametrically along an axial plane of the filter housing into two separate channels each of which runs along the screen to a debris recovery zone diametrically opposite the inlet. At the inlet end the interior space is divided by a streamlined flow divider and at the debris recovery end by a separator member which is either a flat plate or a streamlined member. A stiffening web may be joined to the endwalls across an axial plane of the screen. A partition may divide the interior space perpendicularly to the outlet axis into two compartments.

Abstract: An industrial water intake comprising a screen for screening water and a spray nozzle for detaching deposited debris from the screen and entraining it into a debris recovery channel on the other side of the screen from the spray nozzle. A cylindrical rotary member comprising a roller is arranged along the adjacent longitudinal edge of the debris recover channel. The rotary member rotates in a direction tending to carry debris falling on or coming in contact with the longitudinal edge into the channel to prevent the build up of debris thereon. The rotary member extends above and is disposed inwardly of the longitudinal edge relative to the debris recovery channel. The rotary member is usable on recovery channels for band screens, drum screens or even bar screens associated with trash rakes.

Abstract: A trash rake is disclosed for cleaning the bars of a water intake bar screen. A carriage carrying a pan is mounted for movement parallel to the bar screen. Along the transverse edge of the pan proximate to the screen is a rake member whose teeth are received between adjacent bars during one direction of displacement of the carriage. A watertight recovery gutter for collecting foreign bodies, including living creatures, is arranged in continuity with the rake member and maintains the foreign bodies in water during the ascent of the pan. Preferably, the recovery gutter has a trapezoidal cross section and a transverse wall portion running directly into the rake member which makes an angle of at least 30.degree. with a horizontal plane when the rake member engages the bar screen.

Abstract: A filter particularly for use with industrial waters includes a substantially cylindrical filter housing an inlet pipe inclined on its axis and an axial outlet pipe. A fixed strainer is arranged in the filter housing and communicates with the outlet pipe. Inside the strainer is a substantially conical deflector having a nose which is directed towards the outlet pipe. At least one fin, and, in practice, at least one longer fin and at least one shorter fin extends radially between the deflector and the strainer.

Abstract: A water intake for example for taking cooling water for industrial installations from a river, a lake or the sea, has a sieve with a filter element and a recovery channel associated with the filter element for collecting and saving elements of the biomass which become stuck to the filter element. Electrodes are associated with the recovery channel 25 and are designed to induce an electrical field, at right angles to the recovery channel in the water to be tapped, so as to compel fish either to swim by themselves in the direction of this recovery channel or to allow themselves to be carried towards the recovery channel by a reverse water current induced at right angles thereto.

Abstract: A filter for filtering water, e.g. seawater, for industrial use, in condensers for steam turbines, for example, comprising a spiral housing having a strainer or filter member and having an inlet inclined with respect to the housing and an outlet generally in alignment with the strainer or filter member which is preferably cylindrical. The inlet and spiral shaped housing combine to provide a sweeping water flow pattern along the periphery of the strainer or filter member. A partition is disposed parallel to the axis of the strainer or filter member between the strainer or filter member and the spiral housing, remote from the inlet relative to the flow of water around the strainer or filter member. Solids are collected in an area defined by the partition and parts of the strainer or filter member and spiral housing immediately upstream thereof. Solids may be continuously or intermittently discharged from the solids collecting area.