Patent US3591149A successfully refreshed from Google Patents.
US3591149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeration apparatus
Assignee: Aqseptence Group GmbH
•
Filing: 1969-01-16
•
Granted: 1971-07-06
•
Expires: 1989-01-16
Abstract
Abstract Apparatus for introducing a gas into a liquid by rotating about a vertical shaft a set of long, narrow blades, which extend downwardly and outwardly into the liquid in a radial direction, and which blades are inclined relative to a vertical radial plane passing through the blades. Air is drawn into the liquid on the rear side of the blades and liquid is caused to flow upwardly across the blades.
Inventors
- 👤 Herbert Auler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:04
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/234; B01F23/2342; B01F23/23421; B01F23/234211; C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/14; C02F3/145; C02F3/16; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
174 words
Apparatus for introducing a gas into a liquid comprising: a vertical shaft mounted to be rotated about a vertical axis and adapted to be positioned above the surface of the liquid, at least one elongated blade operatively connected to the shaft for rotation therewith about said vertical axis, the length of the blade being at least twice its width, the longitudinal direction of the blade extending outwardly and downwardly relative to the axis of the shaft, such that the upper, inner end of the blade is adapted to be located above the surface of the liquid and the lower, outer end of the blade is adapted to be located below the surface of the liquid, the blade angle formed at the outer end of the blade between its profile chord and a vertical radial plane passing therethrough being less than 30*, whereby as the blade is rotated about the vertical axis gas is drawn into the liquid on the rear side of the blade and liquid is caused to flow upwardly across the blade.
Claim 2
Dependent Claim
174 words
Apparatus for introducing a gas into a liquid comprising: a vertical shaft mounted to be rotated about a vertical axis and adapted to be positioned above the surface of the liquid, at least one elongated blade operatively connected to the shaft for rotation therewith about said vertical axis, the length of the blade being at least twice its width, the longitudinal direction of the blade extending outwardly and downwardly relative to the axis of the shaft, such that the upper, inner end of the blade is adapted to be located above the surface of the liquid and the lower, outer end of the blade is adapted to be located below the surface of the liquid, the blade angle formed at the outer end of the blade between its profile chord and a vertical radial plane passing therethrough being less than 30*, whereby as the blade is rotated about the vertical axis gas is drawn into the liquid on the rear side of the blade and liquid is caused to flow upwardly across the blade.
Claim 3
Dependent Claim
94 words
Apparatus according to claim 1 wherein the profile chord at the lower part of the blade is positioned, relative to the longitudinal axis of the blade, such that the profile chord at the lower part forms above its intersection with a vertical radial plane passing therethrough a blade angle of inclination which is between 15* on the forward side of the said vertical radial plane and 30* on the rear side of the said vertical plane, said forward and rear sides being defined with reference to the normal direction of rotation of the blade.
Claim 4
Dependent Claim
25 words
Apparatus according to claim 2 wherein the said blade angle of inclination is approximately 15* on the rear side of the said vertical radial plane.
Claim 5
Dependent Claim
27 words
Apparatus according to claim 2 including means for changing the blade angle of inclination by turning the said profile chord about the longitudinal axis of the blade.
Claim 6
Dependent Claim
29 words
Apparatus according to claim 2 wherein the longitudinal axis of the blade extends outwardly and rearwardly of a radial, vertical plane passing through the upper part of the blade.
Claim 7
Dependent Claim
29 words
Apparatus according to claim 5 including means for changing the blade angle of inclination by turning the blade about a vertical axis parallel to the said axis of rotation.
Claim 8
Dependent Claim
25 words
Apparatus according to claim 2 wherein the longitudinal axis of the blade forms an angle between 30* and 60* with the vertical axis of rotation.
Claim 9
Dependent Claim
74 words
Apparatus according to claim 1 wherein at least the lower part of the longitudinal axis of the blade extends rearwardly of a vertical radial plane passing through the upper part of the blade, and forms an angle on the outer side of its intersection with said vertical radial plane which is between 0* and 30* on the side of the said vertical radial plane rearward of the normal direction of rotation of the blade.
Claim 10
Dependent Claim
22 words
Apparatus according to claim 8 wherein the said blade angle is approximately 15* on the rear side of said vertical radial plane.
Claim 11
Dependent Claim
29 words
Apparatus according to claim 8 including means for changing the blade angle of inclination by turning the blade about a vertical axis parallel to the said axis of rotation.
Claim 12
Dependent Claim
27 words
Apparatus according to claim 10 including means for changing the blade angle by turning the profile chord of the blade about the longitudinal axis of the blade.
Claim 13
Dependent Claim
27 words
Apparatus according to claim 8 wherein the longitudinal axis of the blade forms an angle of between 30* and 60* with the said vertical axis of rotation.
Claim 14
Dependent Claim
27 words
Apparatus according to claim 1 wherein the longitudinal axis of the blade is inclined at an angle between 30* and 60* relative to the vertical rotation axis.
Claim 15
Dependent Claim
25 words
Apparatus according to claim 13 wherein the angle formed between the longitudinal axis of the blade and the vertical axis of rotation Is approximately 45*.
Claim 16
Dependent Claim
19 words
Apparatus according to claim 1 wherein the length of the blade is between 2 and 5 times its width.
Claim 17
Dependent Claim
17 words
Apparatus according to claim 15 wherein the length of the blade is approximately 3.5 times its width.
Claim 18
Dependent Claim
19 words
Apparatus according to claim 1 wherein the surface of the blade, at least at its lower end, is flat.
Claim 19
Dependent Claim
36 words
Apparatus according to claim 1 wherein the blade is of substantially constant width and includes a horizontally bent portion at its upper end, said portion being adapted for mounting the blade relative to the said shaft.
Claim 20
Dependent Claim
15 words
Apparatus according to claim 1 including a pair of stationary baffles arranged below the blade.
Claim 21
Dependent Claim
26 words
Apparatus according to claim 19 wherein the baffle plates are arranged one above the other, and said baffle plates intersect on the said axis of rotation.
Claim 22
Dependent Claim
26 words
Apparatus according to claim 1 including a disc extending about the shaft and connected for rotation with the shaft, said disc being mounted above the blades.
Claim 23
Dependent Claim
19 words
Apparatus according to claim 21 wherein the center of the disc is open for the passage of gas therethrough.
Claim 24
Dependent Claim
22 words
Apparatus according to claim 16 wherein the outer circumference of the disc is inclined upwardly at an angle between 10* and 20*.
Claim 25
Dependent Claim
21 words
Apparatus according to claim 23, wherein the outer circumference of the disc is inclined upwardly at an angle of approximately 15*.
References Cited (Backward Citations)
US26970A
Cited
US59811A
Cited
US64614A
Cited
US209767A
Cited
US723977A
Cited
US3378141A
Cited
US3360460A
Cited
US3341450A
Cited
US3479017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |