Abstract: A fluid filtration cell is disclosed which includes a separator disposed between two media elements having outer peripheries which are secured together by an edge seal. The media elements are formed from a material which swells in size due to fluid absorption. The edge seal is formed from a thermoplastic material having a modulus of elasticity which is sufficient to permit radial expansion of the edge seal when the cell media swells in size.

Abstract: A filter element comprising at least one elastomeric end-cap, a thin-walled pleated filter medium having edges thereon constructed and arranged for positioning proximate to the elastomeric end-caps, and a polymeric adhesive material within the end-caps for sealing the edges of the filter media therein, and a method for producing the same.

Abstract: A method for retrieving excess pharmaceutical process fluid from the hold-up volume of a primary fluid filtration device. The hold-up volume is the volume of excess process fluid which accumulates in the bottom of the filter housing below the outlet opening thereof. Because it is considered valuable, the excess pharmaceutical process fluid is retrieved from the lower housing (22) via a drainage port (23) formed therein below the level of the outlet. The excess process fluid is then filtered in a supplemental filtration device (100) that is connected to the drainage port. The supplemental filtration device has a smaller volumetric capacity than the capacity of the primary fluid filtration device.

Abstract: A fluid filtration device is disclosed which includes a capsule housing having an upper housing portion defining an axial fluid inlet and a lower housing portion defining an axial fluid outlet, a filter assembly including an elongated mounting post and a plurality of filtration cells supported on the mounting post in axially spaced apart relationship, and structure operatively associated with the mounting post and the lower housing portion for effectuating axial compression of the filtration cells relative to the mounting post when the mounting post is engaged in the lower housing portion during assembly.

Abstract: A compressible differential pressure energized seal (18) coacting between a filter element (10) and the like and a housing (21) comprises a compressible portion (35) having a large open end (36) and a small open end (37), the large end (36) directed toward and contacting the housing (21 ) and the small end (37) directed toward the filter (10) element; and an annular flange (38) integrally attached to the compressible portion (35) at its small end (37) and extending outwardly, the flange (38) operatively communicating with the filter element (10). The seal (18) may also include at least one flap (43) to center the filter element (10) to which it is attached onto a centering rod (31 ) carried within the housing (21 ). Such a seal (18) is compressed when the element (10) is operationally enclosed within the housing (21 ) to provide a leak-proof seal during operation and is self-energizing during operation such that as the differential pressure increases, it more forcefully engages the sealing surface.

Abstract: A filter apparatus for use in filtering a fluid is provided. The filter apparatus has a plug-in, quick-connect cartridge. The filter apparatus has walls forming a first chamber and a second chamber. The filter apparatus also has a diaphragm having a first surface and having a second surface for separating the chambers. The diaphragm has an aperture with an inner surface for receiving the cartridge. The cartridge has a connector member for attachment to the diaphragm, and has a filter member for filtering the fluid passing between the chambers. The first and second chambers have respective inlet and outlet ports. The connector member has an upset portion which bears against the diaphragm first surface. The connector member also has an extended portion, which extends through the aperture. The extended portion has a groove, which has a snap locking ring that bears against the diaphragm second surface.

Abstract: A filter apparatus for use in filtering a fluid is provided. The filter apparatus has a plug-in, quick-connect cartridge. The filter apparatus has walls forming a first chamber and a second chamber. The filter apparatus also has a diaphragm having a first surface and having a second surface for separating the chambers. The diaphragm has an aperture with an inner surface for receiving the cartridge. The cartridge has a connector member for attachment to the diaphragm, and has a filter member for filtering the fluid passing between the chambers. The first and second chambers have respective inlet and outlet ports. The connector member has an upset portion which bears against the diaphragm first surface. The connector member also has an extended portion, which extends through the aperture. The extended portion has a groove, which has a snap locking ring that bears against the diaphragm second surface.