# US 5,707,562 A · Turbo aerator

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- Number: US 5,707,562 A
- Document ID: US5707562A
- Status: Granted
- Kind: A
- Application number: 08/642,504
- Filed: 1996-05-03
- Granted: 1998-01-13
- Earliest claimed: 1996-05-03
- Assignees: Aeration Industries International, Inc.
- Inventors: Rudolf R. Karliner
- Web page: https://patentgrep.com/patent/US5707562A

## CPC

- B01F 23/23421: {the stirrers rotating about a vertical axis}
- B01F 23/213: by spraying or atomising of the liquids
- B01F 23/23761: {Aerating, i.e. introducing oxygen containing gas in liquids}
- B01F 27/1143: screw-shaped, e.g. worms
- B01F 27/15: Stirrers with tubes for guiding the material
- B01F 27/80: with stirrers rotating about a substantially vertical axis
- B01F 33/503: Floating mixing devices
- B01F 35/3214: {at the upper side of the axis, e.g. driving the stirrer from the top of a receptacle}
- B01F 2101/305: {Treatment of water, waste water or sewage}
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)

## Abstract

Apparatus for use in aeration of a fluid. The apparatus includes a power unit having a rotatable shaft. An impeller is coupled to the shaft. The impeller has a blade with a generally uniform outside diameter. A diffuser head is positioned proximate the impeller. The impeller may be a screw impeller. The diffuser head may be a stepped diffuser head.

## Claims

### Claim 1

An apparatus for use in aeration of a fluid, the apparatus comprising:
a power unit having a rotatable shaft,
an impeller coupled to the shaft, having a blade with a generally uniform outside diameter; and
a diffuser head positioned proximate the impeller, the diffuser head includes a curved region and a stepped region, and the stepped region includes a first step and a second step.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the diffuser head is stationary relative to the power unit.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein the diffuser head curved region is removably connected to the stepped region.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the impeller is a screw impeller.

### Claim 5 (depends on 1)

The apparatus of claim 1, wherein the shaft extends through the diffuser head, and the impeller blade begins at a location proximate the diffuse head.

### Claim 6 (depends on 1)

The apparatus of claim 1, further including:
a tubular member; and
the impeller blade includes a first end and a second, wherein the second end extends into the tubular member.

### Claim 7

An apparatus for use as a surface aerator in the treatment of water, the apparatus comprising:
a motor having a rotatable shaft;
a support structure coupled to the motor;
a tubular member coupled to the support structure, the tubular member including an upper end and a lower end;
a diffuser head held stationary relative to the support structure, the shaft extending through the diffuser head; and
an impeller system coupled proximate the end of the shaft, including an impeller shaft and an impeller blade located about the impeller shaft, the impeller blade having a generally uniform outside diameter, the impeller system extends into the tubular member, the impeller blade including a first end and a second end, the second end of the impeller blade is positioned within the tubular member, and the first end of the impeller blade extends above the upper end of the tubular member and is spaced from the diffuser head.

### Claim 8 (depends on 7)

The apparatus of claim 7, wherein the impeller system is a screw impeller.

### Claim 9 (depends on 7)

The apparatus of claim 7, wherein the diffuser head is a stepped diffuser head.

### Claim 10 (depends on 7)

The apparatus of claim 7, wherein the support structure is a float system.