Patent ID: 6977006
Filing Date: 2005-12-20
Classification: B01D,Y10S

Abstract:
1. A keyed system for a filtration unit, the keyed system comprising: a filter and a cooperating holder, wherein the filter has a filter surface with a perimeter having a key protrusion and the cooperating filter holder has a holder surface with a perimeter with a cooperating lock recess for receiving the key protrusion of the filter, so that the filter is insertable into the holder because the key protrusion slides into the lock recess; wherein the key protrusion comprises a plurality of protrusions all contained within less than a 70 degree arc on a curved surface of the top end of the filter; and wherein the location of the key protrusion and the lock recess on said perimeters is selectively locateable to different circumferential locations on said perimeters so said keyed system is adapted to prevent said filter from being installed in any but its cooperating holder; wherein the filter is an elongated filter with an longitudinal axis and a radius, and wherein said key protrusion is on an upper shoulder of a top end of the filter, and the lock recess is on an inner surface of a cavity of a holder, wherein the cavity receives the filter top end; and wherein the key protrusion comprises three protrusions contained within said less than 70 degree arc on the upper shoulder of the top end of the filter.