Abstract: The instant invention relates to an improved filtering device adapted to eliminate any risk of clogging of the filtering material. The invention provides a filtering device for treating any effluents, which comprises a plurality of filtering walls arranged successively between a chamber containing the effluent to be filtered and a chamber containing the filtered effluent, each filtering wall being constituted by spacedly justaposed strips having a trapezoidal section with the large base of the trapezoid located on the inlet face of the filtering wall, said strips being separated from each other, on the inlet face of the filtering wall, by intervals of equal widths forming slots which define effluent inlet areas, the sum of said inlet areas constituting the total inlet area of a filtering wall, and the total inlet area of the upstream wall being less than the total inlet area of the adjacent downstream wall.

Abstract: In the fluid circulation system of a transmission having a prespecified minimum operating temperature and a minimum fluid flow requirement for operation at the minimum operating temperature, a transmission fluid filter comprising a housing having a fluid inlet and outlet, and a filter element supported in the housing. The filter element is a composite assembly of a fine filtering medium such as a phenolic resin-impregnated felt having an opening therein, and a coarse filtering media such as polyester mesh secured over the opening so as to provide through the respective media parallel continuous fluid flow paths. The surface area ratio of coarse to fine filter media is the minimum ratio sufficient to permit minimum flow through the coarse filtering media at the prespecified minimum operating temperature.

Abstract: A skimming net for cleaning floating debris from the surface of a pool includes the use of a frame attachable to a side portion of the pool and extending outwardly and into the liquid within the pool. A net is slidably positionable over the frame, while the frame may be tilted at a plurality of different angles so as to selectively position the net in a manner which allows a collection of debris as the liquid in the pool flows through the net. A quick disconnect assembly is provided for facilitating a removal of the frame and its net from the pool so that the debris may be removed from the net as desired.

Abstract: An intank fuel filter of flexible woven plastic cloth having spacer means comprising protuberances secured to at least one of the flexible walls and projecting toward the opposite wall to hold the walls against collapse blocking fuelflow. The protuberances may extend completely through the flexible wall to provide external spacers to hold the filter away from the fuel tank wall. Tensioning of certain filters herein with a stiffly resilient rib structure (within opposed plastic cloth filter walls sealed at their marginal edges) against a bottom wall of the fuel tank permits fuel intake even if fuel is low and such bottom wall bows away from the fuel pump.

Abstract: Apparatus for the cross-flow filtration of liquids or gases, such apparatus having disc-shaped filter elements which are located concentrically around a filtrate collecting pipe and within a tubular jacket, and an inlet and outlet pipe extending parallel to the filtrate collecting pipe, each inlet and outlet pipe having an aperture between each filter element to ensure that the liquid to be filtered is supplied tangentially thereby assuming a helical flow across the filter elements. The filter elements are provided on both sides with a microporous membrane and are provided with a supporting layer having sealed passages in order to supply the filtrate to the central collecting pipe.

Abstract: An ion selective semipermeable membrane such as is used in electrodialysis cell assemblies is fabricated with an unreacted border region of a polymer film which is heat sealable to itself and to other materials of similar composition. Within the border region are sealed two flow port connections to pass ionic process liquid across the face of the membrane. The border regions of one membrane are heat seal bonded at the edge to the border regions of a subsequent membrane in a sequence to form an electrodialysis cell assembly accordion bellows like in configuration. The flow ports communicate with the compartments so formed. Membranes produced by chlorosulfonation of polyethylene are especially suitable for heat sealing.

Abstract: A filter element is provided for use with a pressure disc filter. The inventive filter element includes a metal plate having a concave surface. A washer is provided for mounting the metal plate within a pressure disc filter while orienting the concave surface so that it faces upwardly within the pressure disc filter. A clamping ring is provided for holding a filter material above the concave surface. The inventive concept also includes a synthetic resin shield composed of one or more parts and fastened to the concave surface of the metal plate so as to protect this surface of the metal plate against contact with corrosive substances.

Abstract: A consumer rebuildable filter cartridge for mounting in a fluid filter chamber in a fluid flow path includes inner and outer perforated tubular members mounted coaxially on a fixed end cap to form an annular chamber. A filter element of pleated sheet filter material is formed in a tubular construction and fitted into the annular space defined between the inner and outer tubular members and is sealed at each end by suitable resilient seal washers, compressed between the fixed end cap and a movable end cap. The inner and outer tubular members forms support structure for supporting the tubular paper filter element and permits the removal and replacement of such filter elements.

Abstract: An improved gasket means for suspending a filter element from a venturi air nozzle in a dust collector. The gasket means is an annular member of elastomeric material and has an annular recess in the inner side wall in which is received the flared bottom lip of the venturi air nozzle. The annular recess is disposed between first and second rim portions. The annular member has an inside diameter at the second rim portion greater than the inside diameter at the second rim portion. The gasket means includes a structure for securing a filter element to the annular member.

Abstract: A filter apparatus comprises a tank, a pump and pump motor assembly, a filter assembly, and an inlet/outlet hose, which are modular elements easily assembled for use and disassembled for cleaning. The pump and pump motor assembly is detachably mounted to the tank by flanges including alignment pins and releasably connecting means. The filter assembly and inlet/outlet hose are attached to the pump and pump motor assembly by quick disconnect fittings which include heat insulating actuator rings. The filter assembly includes a filter intake pipe having a filter shoe mounted transversely thereto, a plenum grid which fits over the filter intake pipe and is detachably secured to the filter shoe, and a filter bag which fits over the plenum grid and is clamped between the plenum grid and filter shoe to effect a filter bag seal. The filter assembly is provided with a heat insulating handle to facilitate removing it when hot for filter bag replacement.