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FLOATING AERATOR

  • US 3,572,658 A
  • Filed: 01/15/1968
  • Issued: 03/30/1971
  • Est. Priority Date: 01/15/1968
  • Status: Expired due to Term
First Claim
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1. In a liquid aerator of the type comprising a float adapted to be supported buoyantly in a body of liquid and having a vertically extending opening formed therethrough, an upright tubular throat telescoped into said opening with its lower end projecting below the float for immersion in the liquid and with its upper end opening above the float for the discharge of liquid pumped upwardly through the throat, a power rotated shaft carried by said float and extending axially into said throat, a propeller fixed to and rotatable with said shaft to pump liquid upwardly through said throat in response to rotation of said shaft, said propeller comprising a series of angularly spaced and twisted blades radiating outwardly from said shaft and having tips spaced radially inwardly from said throat, and a rotatable diffuser fixed to said shaft above said propeller and said float for impinging against liquid moving upwardly through said throat and for slinging the liquid outwardly across the top of the float, the improvement in said aerator comprising, a tubular ring duct telescoped into said throat and over said propeller with its interior wall surrounding the tips of said blades, said ring duct being spaced inwardly from the walls of said throat to divide the liquid flowing into the throat into a central core passing through the ring duct and an outer cylinder surrounding the core and passing through the space between the ring duct and the throat, and a series of angularly spaced infuser vanes extending radially beneath said ring Duct and anchored in stationary positions, said infuser vanes being twisted by an amount correlated with the twist of said propeller blades to deflect the liquid into the latter at a controlled angle.

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