Abstract:
A fluid filtering device comprising a housing having an open top and defining an interior chamber while an inlet and an outlet on the housing are open to the chamber. A filter bag is removably insertable into the chamber through the open top of the housing and to a filtering position in which the filter element is positioned in between the inlet and the outlet. A rim around the outer periphery of the filter bag engages an inwardly extending flange formed on the housing to secure the filter bag to the housing. A cover is movable with respect the housing between an open and a closed position so that in its closed position, the cover closes the open top of the housing. A tubular element is secured to the cover which engages the filter bag and pushes the filter bag away from the open top of the housing and to its filtering position as the cover is moved to its closed position. In the preferred form of the invention, a pressure responsive valve assembly bypasses fluid directly from the inlet and to the outlet when the filter bag is excessively clogged.
Abstract:
A high pressure liquid filter vessel fabricated of non-metallic materials and used for the filtering of liquid in a permanent installation provides for a simplified method of replacing the filter bag and includes a removable cover which displaces a relatively large volume of liquid. Removal of the cover from the filter housing reduces the liquid level within the housing to a level below the lip of the filter bag, making it easier to grab the lip thereof, and remove the bag without coming into contact with the liquid being filtered. The bracket used for retaining the cover on the filter housing prevents distortion thereof and makes the filter ideally suitable for high pressure filter applications where corrosive liquids are involved.
Abstract:
A closed filter container containing at least one filter cartridge mounted on a plate, whose periphery is clamped between the lid and rim of said container electrically isolating said cartridge and plate from the walls including the lid of the container as disclosed in applicant Harms' prior U.S. Pat. No. 3,720,322. Mounted between the plate and a wall of the container is at least one electrically conducting resilient finger which maintains electrical contact across the gasket which isolates the plate and cartridges regardless of the flexing of the plate due to variations of pressure inside the container. The plate also is provided with three handle members to facilitate removal of the plate and cartridges from the container. The three handle members also act as legs to stably support the plate and cartridges during replacement of the cartridges. Furthermore, these handles have improved configurations for both ease in handling and strengthening.
Abstract:
A filtering apparatus is described in which a filter assembly is encapsulated in a flexible, pliable, light weight shell and is removable as a unit from the filter housing without manually contacting filter media and/or liquid. The filter housing comprises a manifold and a cylindrical casing joined together to form a cavity for receiving the cartridge. The manifold further includes inlet and outlet conduits extending therethrough. The filter cartridge comprises a pair of cylindrical shells interconnected at their open ends, with the interior of the shells forming a cavity for receiving a filter assembly. The end plane of one of the cylindrical shells includes a pair of tubular extensions extending into the inlet and outlet conduits of the manifold. The two cartridge shells are made of plastic or other suitable material and are sufficiently flexible to bear against the side walls of the housing cavity during operation. In one embodiment, the mating ends of the cartridge shells are coupled by a telescoping connection and bonded. In another embodiment, the ends of the cartridge shells form mating annular flanges which are bonded together and further secured between two shoulders formed by the interconnecting housing members. The filter assembly preferably comprises a plurality of annular filter pads surrounding a perforated open ended sleeve and stacked between a pair of annular compression plates. To replace the encapsulated filter cartridge, the manifold and casing are separated and the used filter cartridge is removed as a unit. A new cartridge can be installed within the housing in a similar manner.
Abstract:
A fluid purification filter device which includes a filter casing for accommodating a disposable filter element. The filter casing is provided with a fluid impervious barrier which divides the interior thereof into at least two compartments. The filter element is symmetrically shaped, and is insertable from either end, into the filter casing and interlockingly engaged with the barrier, such that distinct portions of the filter element extend into each of the compartments and the resultant channelized flow is caused to pass through the several distinct portions of the filter element. A modified embodiment has an independent replacement filter cartridge insertable into the filter element.
Abstract:
Filter assembly in which filter element is installed through opening in side of housing, and a seal between an end of the filter element and the adjacent housing wall prevents fluid from bypassing the filter element.