Gas and liquid contact apparatus – Contact devices – Rotating
Reexamination Certificate
2008-07-15
2008-07-15
Bushey, Scott (Department: 1797)
Gas and liquid contact apparatus
Contact devices
Rotating
C261S091000, C261S093000
Reexamination Certificate
active
07398963
ABSTRACT:
An apparatus for mixing gas and liquid is disclosed. The apparatus includes a draft tube having a gas inlet, a liquid inlet, a gas-liquid outlet, and an impeller rotatably mounted within the draft tube. The gas can be entrained into the liquid by rotation of an impeller having a low pitch ratio, such as less than 1:1. The impeller can have a diameter than is greater than the axial length of the impeller and includes at least one blade extending at least 30° around an axis of rotation of the impeller. Liquid turning vanes can also be positioned external to the draft tube to rotate liquid entering the draft tube in a direction opposite the direction of rotation of the impeller. The impeller can be constructed to create a reduced pressure zone, which directs gas axially downward within the draft tube upon rotation of the impeller.
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Bushey Scott
Gordon, Esq. Matthew W.
Pietragallo Gordon Alfano Bosick & Raspanti, LLP
Towner, Esq. Alan G.
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