US3738620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aquarium aerator
Assignee: Individual
•
Filing: 1971-08-04
•
Granted: 1973-06-12
•
Expires: 1991-08-04
Abstract
Abstract An aerator for an aquarium which includes a venturi tube in the recirculating system at the water return side, air and water reservoirs located adjacent the venturi tube, a small passage carrying controlled amounts of air in the upper portion of the passage from the air reservoir and controlled amounts of water in the lower portion of the passage from the water reservoir, the passage having a discharge port opening to the restricted section of the venturi where the air enters the water forming tiny bubbles, and a manually adjustable control for adjusting the air/water ratio flow through the passage. The passage being dimensioned such that the water meniscus in the passage covers a substantial portion of the passage.
Inventors
- 👤 B Ennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:56
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/315; A; A01; A01K; A01K63/00; A01K63/04; A01K63/042; B01F23/00; B01F23/40; B01F23/45; B01F23/454; B01F25/20; B01F25/21; B01F23/20; B01F23/23; B01F25/312; Y; Y10; Y10S; Y10S261/00; Y10S261/75
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
An aerator for an aquarium comprising: a. a venturi tube adapted for connection to a source of water; b. a water reservoir mounted adjacent the throat of said venturi; c. means for supplying water to said reservoir; d. an air reservoir; e. means suppLying air to said reservoir; f. a first passageway connecting said air and water reservoirs with said venturi throat and having an opening substantially smaller than the throat opening; and g. means for adjusting the air and water ratio so that water and air will flow through said first passageway such that the meniscus formed on the wall of said first passage constitutes a substantial portion of the air opening in said first passageway.
Claim 2
Dependent Claim
117 words
An aerator for an aquarium comprising: a. a venturi tube adapted for connection to a source of water; b. a water reservoir mounted adjacent the throat of said venturi; c. means for supplying water to said reservoir; d. an air reservoir; e. means suppLying air to said reservoir; f. a first passageway connecting said air and water reservoirs with said venturi throat and having an opening substantially smaller than the throat opening; and g. means for adjusting the air and water ratio so that water and air will flow through said first passageway such that the meniscus formed on the wall of said first passage constitutes a substantial portion of the air opening in said first passageway.
Claim 3
Dependent Claim
19 words
An aerator as described in claim 1 comprising: a. means regulating the supply of water to said water reservoir.
Claim 4
Dependent Claim
19 words
An aerator as described in claim 1 comprising: a. means controlling the supply of air to said air reservoir.
Claim 5
Dependent Claim
50 words
An aerator as described in claim 2 comprising: a. a second passageway connecting said water reservoir and said source of water; b. said means for adjusting the level of water in said water reservoir being operatively connected to said second passageway; and c. said water reservoir being open to atmosphere.
Claim 6
Dependent Claim
77 words
An aerator as described in claim 3 comprising: a. said water reservoir being operatively connected to the water in said aquarium; b. a closed air reservoir mounted above said water reservoir and open to said water reservoir; and c. said means for adjusting the level of water in said water reservoir includes an air passage connecting said air reservoir and the atmosphere and a valve operatively connected to said air passage for restricting the flow of air.
Claim 7
Dependent Claim
43 words
An aerator as described in claim 1 comprising: a. air and water reservoirs being located below the water surface of said aquarium; and b. snorkel means connected to said air reservoir and extending above the water surface of the aquarium to the atmosphere.
References Cited (Backward Citations)
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |