Patent ID: 6048455
Filing Date: 2000-04-11
Classification: B01D

Abstract:
A filter assembly for filtering a flow of liquid at an operating pressure of greater than 50 psi, said filter assembly comprising:a base defining a reference receptacle structure, said reference receptacle structure surrounding a central axis and having an engagement surface disposed entirely within said receptacle structure, said engagement surface comprising at least one protrusion extending outwardly from said engagement surface for at least 0.150 inches, wherein said protrusion is radially spaced apart from said central axis and does not entirely surround said central axis; anda filter cartridge having at one end portion thereof a reference container structure configured for reception within said receptacle structure, said one end portion comprising an end surface positioned adjacent said engagement surface when said filter cartridge is mounted to said base, said container structure being at least semi-flexible wherein said container structure plastically deforms due to pressure induced forces of liquid within said cartridge, so that upon mounting said cartridge to said base, said container structure is drawn into a closer conformal relationship to said receptacle structure during operation;wherein said end surface of said cartridge more closely conforms to said protrusion to prevent rotation of the end surface of said filter cartridge about said central axis with respect to said engagement surface.