Patent ID: 6695891
Filing Date: 2004-02-24
Classification: B01D,Y10S

Abstract:
A keyed system for filters and their holders, wherein the keyed system comprises:a filter and a cooperating holder, wherein: the filter has a filter surface with a perimeter having a first set of a plurality of key protrusions; the cooperating holder has a holder surface with a circumferential perimeter having a first cooperating recess structure having a plurality of axial portions separated by radially-protruding ridges, and the cooperating recess structure further having one circumferentially-extending lock portion having an open end near, and in mechanical communication with, said axial portions and having a closed opposite end; and said key protrusions slide through the axial portions during axial insertion of the filter into the holder and, upon angular rotation of the filter in the holder, said first set of a plurality of key protrusions are received in the one circumferentially-extending lock portion.