A filtration device that includes: a filtration filter having a first main surface that captures a filtration target object contained in a liquid and a second main surface that faces the first main surface; and a housing that holds the filtration filter, and defines a liquid inflow path that faces the first main surface and a liquid discharge path that faces the second main surface, the housing including a tubular portion that extends in a direction away from the second main surface of the filtration filter and defines the liquid discharge path, and a flange portion that extends from an outer peripheral surface of the tubular portion, and the flange portion includes a vent hole extending away from the outer peripheral surface of the tubular portion.

A filtration device that includes: a filtration filter having a first main surface that captures a filtration target object contained in a liquid and a second main surface that faces the first main surface; and a housing that holds the filtration filter, and defines a liquid inflow path that faces the first main surface and a liquid discharge path that faces the second main surface, the housing including a tubular portion that extends in a direction away from the second main surface of the filtration filter and defines the liquid discharge path, and a flange portion that extends from an outer peripheral surface of the tubular portion, and the flange portion includes a vent hole extending away from the outer peripheral surface of the tubular portion.

A filter holder for holding an open ended filter having an open proximal end and an open distal end in an operative position on a swimming pool cleaner having a pipe stub for receiving one open end of the filter is shown and described. The filter holder includes a cap for covering one open end of the filter, a coupler configured to cooperate with and engage the pipe stub, and a spanning connector configured to span and connect the cap and the coupler outside the pipe stub of the filter. The coupler may include L-shaped brackets. A constricting collar pins the brackets to the pipe stub. The spanning connector may include compression rods and nuts. The filter holder may include an optional adapter collar separable from the coupler, to adapt diameters of the coupler and the pipe stub. The invention may alternatively be considered to be a mobile swimming pool cleaner having a pleated medium filter rather than a flaccid bag filter.

A filter holder for holding an open ended filter having an open proximal end and an open distal end in an operative position on a swimming pool cleaner having a pipe stub for receiving one open end of the filter is shown and described. The filter holder includes a cap for covering one open end of the filter, a coupler configured to cooperate with and engage the pipe stub, and a spanning connector configured to span and connect the cap and the coupler outside the pipe stub of the filter. The coupler may include L-shaped brackets. A constricting collar pins the brackets to the pipe stub. The spanning connector may include compression rods and nuts. The filter holder may include an optional adapter collar separable from the coupler, to adapt diameters of the coupler and the pipe stub. The invention may alternatively be considered to be a mobile swimming pool cleaner having a pleated medium filter rather than a flaccid bag filter.

Liquid filter arrangements are described and shown. The arrangements generally include a filter member comprising a shell enclosing a filter cartridge. Unique features for interface between the enclosed filter cartridge and the shell are provided. Also provided are unique features for interaction between the cartridge and a filter head, in use.

Liquid filter arrangements are described and shown. The arrangements generally include a filter member comprising a shell enclosing a filter cartridge. Unique features for interface between the enclosed filter cartridge and the shell are provided. Also provided are unique features for interaction between the cartridge and a filter head, in use.

Liquid filter arrangements are described and shown. The arrangements generally include a filter member comprising a shell enclosing a filter cartridge. Unique features for interface between the enclosed filter cartridge and the shell are provided. Also provided are unique features for interaction between the cartridge and a filter head, in use.

Liquid filter arrangements are described and shown. The arrangements generally include a filter member comprising a shell enclosing a filter cartridge. Unique features for interface between the enclosed filter cartridge and the shell are provided. Also provided are unique features for interaction between the cartridge and a filter head, in use.

Provided is an improved filtration module assembly comprising a vessel having a filtration cartridge disposed within it and a header coupled to an end of the vessel, the header including a housing having an open-ended upper end and a lower end, and an end cap including a portion that mates with a complimentary structure defined by the inner all of the open ended upper end of the housing to removable engage with the housing and the end cap may further define a passageway for fluid to flow out of the vessel. The filtration module assembly may enable an improved manifold arrangement used to communicate fluids to and from a filtration system comprising a plurality of such modules and the configurations of the present invention may facilitate improved operation of such filtration systems.

Provided is an improved filtration module assembly comprising a vessel having a filtration cartridge disposed within it and a header coupled to an end of the vessel, the header including a housing having an open-ended upper end and a lower end, and an end cap including a portion that mates with a complimentary structure defined by the inner all of the open ended upper end of the housing to removable engage with the housing and the end cap may further define a passageway for fluid to flow out of the vessel. The filtration module assembly may enable an improved manifold arrangement used to communicate fluids to and from a filtration system comprising a plurality of such modules and the configurations of the present invention may facilitate improved operation of such filtration systems.