Filter system

DETAILED DESCRIPTION The invention is a filter system having filter material, e.
g.
, absorbent material, to treat liquid flowing therethrough.
The filter system includes: (a) a housing having a peripheral wall defining a filter chamber therein, the filter chamber including an inlet for inflow of the liquid and an outlet for discharging the liquid; (b) a removable rack for placement within the filter chamber of the housing, the rack being movable between a first position received in the filter chamber and a second position removed from the filter chamber; and (c) one or more filter components, each filter component supporting a quantity of the filter material, the filter components normally being held by the rack in the path of liquid flow but being separable therefrom when the rack is in the second position.
In accordance with other aspects of the invention, the filter system is for a drainage system, the drainage system having an outer grating supported on a ledge that extends around the perimeter of the drainage system, with the filter system using absorbent materials positioned to filter liquid flowing therethrough.
In accordance with another aspect of the invention, the filter system includes: (a) a housing to be positioned within the drainage system and underneath the outer grating, the housing having a top that is nearest the protective grating and a bottom opposite the top; (b) one or more filter components, each filter component including absorbent materials and means for supporting the absorbent materials, the absorbent materials removing contaminants and particulate matter from liquid flowing into the drainage system and through the filter system; and (c) a removable rack dimensioned to fit into the housing and including a plurality of holding members that support the filter components, the housing and rack having cooperating members that in a first position are engaged to support the rack within the housing, and that in a second position are disengaged to allow the rack to be separated from the housing to provide access to the filter components