Patent ID: 7000781
Filing Date: 2006-02-21
Classification: B01D,G01N

Abstract:
1. A littering device, comprising: opposing duct-shaped filter portions, one of the filter portions having an operable axial end defining a projection and the other of the filter portions having an operable axial end defining a receptacle complementarily configured with respect to and capable of receiving the projection, the operable axial ends of the filter portions being operably engageable such that the projection and the receptacle cooperate to define at least one filtering slot therebetween, the at least one filtering slot being configured to change in width as the filter portions are moved axially in relation to each other, the filter portions being further configured such that a first pressure associated with a filtrate sample received through the at least one filtering slot in a sample flow direction causes tile filter portions to move toward each other so as to minimize the width of the at least one filtering slot, and such that a second pressure associated with rinsing through the at least one filtering slot opposite to the sample flow direction causes the filter portions to move apart and increases the width of the at least one filtering slot so as to facilitate rinsing therefrom of solid particles filtered by the at least one filtering slot.