Apparatus for aerating liquids

Patent 5356570 Issued on October 18, 1994. Estimated Expiration Date:

September 10, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2138349

2458061

2767964

2767965

3439807

3891729

3911064

Aerator for industrial and domestic wastewaters Patent #: 4925598
Issued on: 05/15/1990
Inventor: Kivisto, et al.

Inventors

Application

No. 120005 filed on 09/10/1993

US Classes:

261/93Submerged blast

Examiners

Primary: Miles, Tim R.

Attorney, Agent or Firm

Holler; Norbert P.

Foreign Patent References

0204688 EP. 01/26/1990
3210473 DE. 10/26/1983
2444494 FR. 07/26/1980

International Class

B01F 003/04

Foreign Application Priority Data

1992-09-10 AT

Abstract

An apparatus for aerating liquids includes a gas- and liquid-feeding rotor (6) and a surrounding stator (7) arranged in the bottom region of a container (2). The rotor (6) is mounted for rotation about a vertical axis, and the stator (7) comprises two vertically spaced, horizontally parallel, annular plates (8, 8a) defining a central rotor-accommodating cavity (7b) and includes a plurality of circumferentially spaced guide channels (9) located between the plates and arranged non-radially in the direction of rotation of the rotor (6) for conducting the gas-liquid mixture from the stator cavity (7b) to the outer perimeter of the stator (7). Connected to the discharge ends of the guide channels (9) are respective elongated, circumferentially spaced distributing pipes (14) for conducting the liquid-gas mixture over a greater basal area of the direct aeration region than would be afforded by the guide channels (9) per se, the distributing pipes (14) being provided with upwardly directed distribution openings (15) over substantially their entire lengths.