Patent ID: 7032760
Filing Date: 2006-04-25
Classification: B01D

Abstract:
1. A backwash, flushing filter assembly comprising: a header assembly wherein the header assembly includes a cylinder cap having at least one pin guide, a cylinder base with threaded connector means disposed within the interior circumference of the cylinder base, a fluid inlet connect and a filtered fluid outlet connect; a rotatable valve assembly which is slidably connected to the header assembly wherein the rotatable valve assembly includes an interior chamber with a backwash fluid inlet port, a filtered fluid outlet port, and at least one seal gasket; a filter element assembly which is releasably connected to the rotatable valve assembly wherein the filter element assembly includes, a filter stalk with filter ports formed in the filter stalk, and a filter media disposed around the exterior of the filter stalk; and, a filter housing assembly which is releasably connected to the header assembly wherein the filter housing assembly includes a filter housing and a backwash drain port, wherein said backwash drain port is located at the bottom of the filter housing; further wherein the rotatable valve assembly further includes a turn knob and an inclined turn guide slot formed on the exterior circumference of the rotatable valve assembly, thereby enabling the filter stalk to be adjustably secured within the filter housing yet axially movable by rotation of the rotatable valve assembly; further wherein the rotatable valve assembly is rotatable between a filtration position and a backwash position located one-quarter turn from the filtration position, such that in the filtration position the gasket stem of the filter element assembly covers the backwash drain port at the bottom of the filter housing, and such that in the backwash position the backwash drain port is uncovered by the gasket stem of the filter element assembly; and, further wherein at least one set pin is inserted through at least one pin guide on the cyclinder cap and mates to the turn guide slot of the rotatable valve assembly.