Liquid purification or separation – Structural installation – Closed circulating system
Reexamination Certificate
2005-11-08
2005-11-08
Prince, Fred G. (Department: 1724)
Liquid purification or separation
Structural installation
Closed circulating system
C210S416200, C210S448000
Reexamination Certificate
active
06962655
ABSTRACT:
A basket that is used in a pool cleaning system includes a flap that is biased closed and is opened against the bias by water flowing into the basket. When a pump drawing water out of a pool moves water through the basket, debris in the water is trapped in the basket. However, when the pump is shut off, any back flow of water associated with the pump shut off will not cause debris to move out of the basket because the flap will be shut by the bias and the backward movement of water.
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Gillespie David L.
Gjerstad Bruce D.
Prince Fred G.
Schoonover Donald R.
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