US 12,440,790 B2
Rectangular filters, assembly and method for filtration
James Harris, Houston, TX (US); Tyler J. Johnson, Houston, TX (US); and Christopher D. Wallace, Houston, TX (US)
Assigned to FILTRATION TECHNOLOGY CORPORATION, Houston, TX (US)
Filed by FILTRATION TECHNOLOGY CORPORATION, Houston, TX (US)
Filed on Jun. 3, 2022, as Appl. No. 17/832,475.
Application 17/832,475 is a division of application No. 15/901,580, filed on Feb. 21, 2018, granted, now 11,364,458.
Claims priority of provisional application 62/462,327, filed on Feb. 22, 2017.
Prior Publication US 2022/0297043 A1, Sep. 22, 2022
Int. Cl. B01D 53/22 (2006.01); B01D 45/02 (2006.01); B01D 46/00 (2022.01); B01D 46/24 (2006.01); B01D 46/42 (2006.01); B01D 46/52 (2006.01); B01D 46/58 (2022.01); B01D 50/20 (2022.01)
CPC B01D 46/0031 (2013.01) [B01D 45/02 (2013.01); B01D 46/0008 (2013.01); B01D 46/2403 (2013.01); B01D 46/4227 (2013.01); B01D 46/521 (2013.01); B01D 46/58 (2022.01); B01D 50/20 (2022.01); B01D 2275/201 (2013.01); B01D 2275/205 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for filtering a dirty liquid comprising:
a) introducing the dirty liquid to be filtered into a filter housing with a plurality of rectangular shaped filters, wherein the plurality of rectangular shaped filters are removably secured in the filter housing, and wherein the plurality of rectangular shaped filters each having a trapezoidal shape where width of the filter is gradually increased toward one end of the filter;
b) initiating a filtration process with differential pressure of 2 PSID and continuing the filtration process with an increase of the differential pressure up to and including 35 PSID;
c) passing the dirty liquid into a central void located in each of the rectangular shaped filters and further passing the dirty liquid through a layer of media surrounding the void;
d) collecting the filtered liquid in a separate chamber of the filter housing;
e) removing filtered liquid from the filter housing; and
f) optionally removing the rectangular shaped filters and installing new rectangular shaped filters.