Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Reexamination Certificate
2005-03-01
2005-03-01
Lawrence, Frank M. (Department: 1724)
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
C210S137000, C210S323200, C210S350000, C210S488000
Reexamination Certificate
active
06861003
ABSTRACT:
An apparatus according to the invention includes filter sticks housed within a pressure vessel. Each filter stick includes a plurality of filter disks stacked about a fluid-pervious tube with a hollow core and retained about the tube by a retainer at each end. The filter sticks are disposed within a first compartment having fluid to be filtered with the hollow core of the tube in fluid communication with a second compartment for filtrate. A compression regulator, which is responsive to pressure within the compartment, is linked to at least one of the retainers so as to control relative movement between the retainers, which controls compression of the disks and interstitial space for fluid to flow therebetween. In use, automated compression control of the disks compensates for the effect of particle build-up in the filter, which would otherwise decrease the rate of flow through the filter.
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Backman Sune
Maropis Nicholas
Drinker Biddle & Reath LLP
Lawrence Frank M.
Transor Filter USA, Inc.
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