Liquid purification or separation – Structural installation – Closed circulating system
Reexamination Certificate
2005-08-17
2008-03-18
Prince, Fred G. (Department: 1797)
Liquid purification or separation
Structural installation
Closed circulating system
C210S167120, C210S416200, C004S507000
Reexamination Certificate
active
07344639
ABSTRACT:
A swimming pool water circulation system includes up to two sets of at least two active main drains connected to a “Y” or a “double Y” connector and then, via a single line, to a single canister filter. Jet nozzles arranged in at least one bank on the pool walls use return water to sweep sediment down the pool walls and to cause a vortical flow of the water above the drains. The additional main drains can be deployed closer to the pool walls where they can better intercept sediment from the jet nozzles. Up to two pumps can service each canister filter. Additional suction may be obtained by diverting a portion of the water from the pressure side of the filter through a venturi in the canister filet housing. Additional components and valves managed by a controller can facilitate sequential cleaning of the pool by zones during normal operation without unduly affecting normal filtration of pool water and can provide for additional cleaning via robotic devices.
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patent: 2005/0066435 (2005-03-01), Barnes et al.
Mann Michael A.
Nexsen Pruet , LLC
Prince Fred G.
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