US3792840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submerged turbine aerator
Assignee: Westinghouse Electric Corp
•
Filing: 1971-06-15
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Granted: 1974-02-19
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Expires: 1991-06-15
Abstract
Abstract A submerged aerator rotor for use with sparged air for water and waste treatment systems. The air is supplied evenly distributed azimuthally to the bottom of a circular shroud which is rotated by a vertical shaft from the surface of a treatment tank. The upper surface of the shroud is vaned with a clearance between the vane tip and the shroud edge.
Inventors
- 👤 F Sisk
- 👤 C Garland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:44
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; C02F3/205; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/233; B01F23/2336; B01F23/23362; B01F27/00; B01F27/05; B01F27/11; B01F27/115; B01F27/1152; B01F27/111; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
An aerator adapted for submerged operation comprising: a rotatable shaft supporting a flat shroud of circular configuration adapted for submergence in a liquid; a drive train connected to the other end of said shaft; impeller vanes mounted on the upper surface of said shroud; an inverted conical fairing attached to the underside of said shroud, said shroud extending radially beyond the outer end of said impeller vanes; air sparge means mounted beneath said shroud and concentrically disposed with respect to said conical fairing for azimuthally distributing air onto the lower surface of said shroud; whereby upon rotation of the impeller, a continuous liquid jet is directed radially outward of the shroud, and as the air spills from under the shroud into the jet, it is sheared into small bubbles which become dispersed in the liquid and provide maximum transfer of oxygen thereto.
Claim 2
Dependent Claim
142 words
An aerator adapted for submerged operation comprising: a rotatable shaft supporting a flat shroud of circular configuration adapted for submergence in a liquid; a drive train connected to the other end of said shaft; impeller vanes mounted on the upper surface of said shroud; an inverted conical fairing attached to the underside of said shroud, said shroud extending radially beyond the outer end of said impeller vanes; air sparge means mounted beneath said shroud and concentrically disposed with respect to said conical fairing for azimuthally distributing air onto the lower surface of said shroud; whereby upon rotation of the impeller, a continuous liquid jet is directed radially outward of the shroud, and as the air spills from under the shroud into the jet, it is sheared into small bubbles which become dispersed in the liquid and provide maximum transfer of oxygen thereto.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |