Simplified filter

摘要

A filter includes a structurally rigid adsorptive filtering medium formed as a sintered porous material chosen to remove targeted contaminant(s). The adsorptive filtering medium forms a hollow chamber sized to receive a mechanical filtering medium which is sized to press outward against the adsorptive filtering medium which supports the mechanical filtering medium thus eliminating a cage and a core to support the mechanical filtering medium and leading to a simplified construction. The fluid enters the filter through substantially the entire face of the adsorptive filtering structure and proceeds through the mechanical filtering medium which is a pleated paper filter. The hollow chamber may be capped at each end such that the caps effectively seal the filter and direct the fluid through the adsorptive filter medium and the mechanical filter medium.

主权项

1. A filter for filtering contaminants in a fluid from a fluid source, said filter comprising:
an adsorptive filter medium (AFM) having an AFM length, an AFM first end, an AFM second end, a wall having an exterior surface positioned to receive said fluid unimpeded and with substantial even pressure from said fluid source and an interior surface opposite said exterior surface, said wall being formed of a material which has a first porosity to pass said fluid therethrough while inhibiting the passage of first selected contaminants therethrough, said wall being formed of material selected to function as the exoskeleton of said filter, said wall having a thickness between said exterior surface and said interior surface which thickness in combination with said first porosity is selected to regulate the time the fluid is in contact with said filter and the flow rate of fluid moving therethrough at a preselected pressure at the exterior surface, and said wall being formed with said interior surface oriented to define a chamber; a mechanical filtering medium (MFM) having a MFM length substantially the same as the AFM length, said MFM being positioned in said chamber and supported by said AMF and positioned to receive said fluid from said AFM, and said MFM being formed of a nonrigid and pleated material which has an electro positive charge which has a second porosity that is different from said first porosity selected for allowing said fluid to flow therethrough while inhibiting the passage of second selected contaminants therethrough and which in combination with said AFM are effective to remove viral contaminants in said fluid, and said MFM being shaped to define a central passage into which said fluid flows to form filtered fluid; an end cap sized to sealingly attach to one of said AFM first end and said AFM second end; an outlet aperture formed in said end cap to be in communication with said central passage, said outlet aperture being sized for the passage of said filtered fluid to the exterior of said filter; a seal cap sized to sealingly attach to the other of said first end and said second end of said AFM; and sealing material for sealing said AFM and said MFM to and between said end cap and said seal cap.