Patent ID: 7998349
Filing Date: 2011-08-16
Classification: B01D,Y10T

Abstract:
1. A serial filtration device having opposing open and closed ends, including two or more concentric cylindrical filter layers wherein each filter layer is capable of being independently integrity tested before being assembled into the filtration device, comprising: a.) two or more concentric cylindrical layers of filters including, b.) a porous spacer layer located between the first and second filter layers, being liquid tightly bound to the first and second endcaps of the second filter layer; c.) a porous core, a top closed endcap and a bottom open endcap having an outlet for the filter device; d.) a closed top cartridge endcap; e.) an open bottom cartridge endcap including a filtered fluid outlet for filtered fluids exiting the filter device; wherein the first filter layer being arranged concentrically around the core and outlet of the device and having an inner diameter equal to or larger than an outer diameter of the core; wherein the second filter layer having an inner diameter equal to or larger than an outer diameter of the first filter layer and being arranged concentrically around the first filter layer; f.) the first filter layer first endcap being bonded in a liquid tight manner to the core and to the closed top cartridge endcap, and the outer edges of the first filter layer first endcap being bonded in a liquid tight manner to the inner edges of the second filter layer first endcap, wherein the second filter layer first endcap being bonded in a liquid tight manner to the closed top cartridge endcap, a; g.) the first filter layer second endcap being bonded in a liquid tight manner to the core and to the open bottom cartridge endcap, and the outer edges of the first filter layer second endcap being bonded in a liquid tight manner to the inner edges of the second filter layer second endcap, wherein the second filter layer second endcap is bonded in a liquid tight manner to the open bottom cartridge endcap; h.) a porous outer cartridge housing arranged concentrically around an outer periphery of the second filter layer and bonded in a liquid tight manner to, wherein the serial filtration device includes opposing open and closed ends such that during liquid filtration a liquid must enter the filtration device i) through the porous outer cartridge housing, ii) flow through the second filter layer, iii) flow through the porous spacer layer, iv) followed by the liquid flowing flow through the first filter layer, v) into the core, and vi) exit the filtration device through the open outlet in the bottom open endcap.