Filter assembly with sealed windowed flow path

1. A filter assembly comprising a filter element extending laterally along a lateral plane, an element plate extending laterally outwardly from said filter element to a perimeter, first and second housing shells axially spaced along an axial direction, said axial direction being transverse to said lateral plane, said filter element being axially between said first and second housing shells, said element plate having a first side axially facing said first housing shell and defining a first plenum therebetween, said element late having a second side axially facing said second housing shell and defining a second plenum therebetween, a first set of one or more windows formed axially through said element plate and passing flow axially between said first and second plenums, a second set of one or more windows formed axially through said element plate and passing flow axially between said first and second plenums, wherein said filter assembly has a flow path therethrough through said first set of one or more windows then through said filter element then through said second set of one or more windows, such that said filter element lies along said flow path between said first and second sets of one or more windows, wherein said flow path has a first segment extending axially through said first set of one or more windows in a first axial direction, a second segment extending laterally along said first plenum and then at least partially axially through said filter element and then laterally along said second plenum, and a third segment extending axially through said second set of one or more windows, wherein flow along said first segment of said flow path flows in a first axial direction through said first set of one or more windows, and flow along said third segment of said flow path flows through said second set of one or more windows in the same said first axial direction.

2. A filter assembly comprising a filter element extending laterally along a lateral plane, an element late extending laterally outwardly from said filter element to a perimeter, first and second housing shells axially spaced along an axial direction, said axial direction being transverse to said lateral plane, said filter element being axially between said first and second housing shells, said element plate having a first side axially facing said first housing shell and defining a first plenum therebetween, said element plate having a second side axially facing said second housing shell and defining a second plenum therebetween, a first set of one or more windows formed axially through said element plate and passing flow axially between said first and second plenums, a second set of one or more windows formed axially through said element plate and passing flow axially between said first and second plenums, wherein said filter assembly has a flow path therethrough through said first set of one or more windows then through said filter element then through said second set of one or more windows, such that said filter element lies along said flow path between said first and second sets of one or more windows, wherein flow along said flow path flows from upstream to downstream including from an inlet in said second housing shell to said first set of one or more windows to said first plenum to said filter element to said second plenum to said second set of one or more windows to an outlet in said first housing shell, and comprising a first subplenum in said second housing shell adjacent said second plenum, and a second subplenum in said first housing shell adjacent said first plenum, wherein a given one of said first and second housing shells has a first dividing wall extending therefrom and separating and defining said second plenum and said first subplenum, wherein flow flows through said inlet into said first subplenum on one side of said first dividing wall then through said first set of one or more windows then into said first plenum then through said filter element then into said second plenum on another side of said first dividing wall opposite said one side of said first dividing wall, and wherein a selected one of said first and second housing shells has a second dividing wall extending therefrom and separating and defining said first plenum and said second subplenum, wherein fluid flows from said first plenum on one side of said second dividing wall then through said filter element then into said second plenum then through said second set of one or more windows into said second subplenum on another side of said second dividing wall opposite said one side of said second dividing wall.

3. A filter element for a filter assembly having first and second housing shells facing each other along an axial direction and defining first and second plenums, said filter element extending laterally along a lateral plane and having an element plate extending laterally outwardly therefrom to a perimeter, said axial direction being transverse to said lateral plane, said filter element being locatable between said first and second housing shells, said element ate having a first side axially facing said first plenum, said element late having a second side axially facing said second plenum, a first set of one or more windows formed axially through said element plate and passing flow axially between said first and second plenums, a second set of one or more windows formed axially through said element plate and passing flow axially between said first and second plenums, wherein said filter element has a flow path therethrough through said first set of one or more windows then through said filter element then through said second set of one or more windows, such that said filter element lies along said flow path between said first and second sets of one or more windows, wherein said flow path has a first segment extending axially through said first set of one or more windows in a first axial direction, a second segment extending laterally along said first plenum and then at least partially axially through said filter element and then laterally along said second plenum, and a third segment extending axially through said second set of one or more windows, wherein flow along said first segment of said flow path flows in a first axial direction through said first set of one or more windows, and flow along said third segment of said flow path flows through said second set of one or more windows in the same said first axial direction.