Patent US1737779A successfully refreshed from Google Patents.
US5397463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerobic aquarium filter chamber
Assignee: Tetra Holding US Inc
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Filing: 1993-10-13
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Granted: 1995-03-14
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Expires: 2013-10-13
Abstract
Abstract A combination of a physical filter and aerobic filter positioned entirely on the outside of an aquarium tank. Water is pumped into the physical filter chamber and upon reaching a level above the chamber walls of the physical filter it spills by gravity flow to both an aerobic filter also contained within the housing and back into the aquarium tank. The water entering the aerobic filter is filtered and passed back to the physical filter where the filtering is repeated.
Inventors
- 👤 Klaus Woltmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:09
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/04; A01K63/045
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
167 words
A combined physical filter and aerobic filter contained in a single housing for physical and biological filtration of contaminated aquarium water in an aquarium tank, comprising: a filtering chamber containing means for physical filtration of aquarium water, said filtering chamber having first and second spillways positioned on a top side thereof through which filtered water overflowing the filtering chamber exits by gravity flow; pump means for pumping contaminated water from the aquarium tank into said filtering chamber; an aerobic chamber containing a medium supporting aerobic bacterial growth and positioned to receive the filtered water exiting the first spillway; means for delivering water exiting the aerobic chamber directly back to the filtering chamber, the means for delivering being positioned within the housing; means for attaching the combined filter to an exterior side wall of the aquarium tank positioning the second spillway to overhang the exterior side wall of the aquarium tank thereby delivering the filtered water exiting the filtering chamber back to the aquarium tank by gravity flow.
Claim 2
Dependent Claim
167 words
A combined physical filter and aerobic filter contained in a single housing for physical and biological filtration of contaminated aquarium water in an aquarium tank, comprising: a filtering chamber containing means for physical filtration of aquarium water, said filtering chamber having first and second spillways positioned on a top side thereof through which filtered water overflowing the filtering chamber exits by gravity flow; pump means for pumping contaminated water from the aquarium tank into said filtering chamber; an aerobic chamber containing a medium supporting aerobic bacterial growth and positioned to receive the filtered water exiting the first spillway; means for delivering water exiting the aerobic chamber directly back to the filtering chamber, the means for delivering being positioned within the housing; means for attaching the combined filter to an exterior side wall of the aquarium tank positioning the second spillway to overhang the exterior side wall of the aquarium tank thereby delivering the filtered water exiting the filtering chamber back to the aquarium tank by gravity flow.
Claim 3
Dependent Claim
53 words
The filter of claim 1, wherein the pump means includes: an inlet pipe having a hole in a base thereof; and a passageway connected between the inlet pipe and the filtering chamber, wherein said water exiting the aerobic chamber joins the contaminated water from the aquarium tank to flow to the filtering chamber.
Claim 4
Dependent Claim
32 words
A filter as claimed in claim 2, further comprising dispersion means covering the aerobic chamber for providing more uniform trickling of the water, received from the first spillway, into the aerobic chamber.
Claim 5
Dependent Claim
43 words
The filter as claimed in claim 2, wherein the aerobic chamber includes an inner compartment having a plurality of holes on said compartment for allowing water to flow out of the compartment and to enter the housing after trickling through the aerobic chamber.
Claim 6
Dependent Claim
24 words
The filter as claimed in claim 4, wherein the inner compartment further includes a plurality of apertures to expose the aerobic medium to air.
Claim 7
Dependent Claim
53 words
The filter of claim 2, wherein the means for delivering includes a collar slidably positioned around the inlet pipe to control water level in the outer compartment, and wherein water flows back through the hole in the base of the inlet pipe to the filter chamber at a rate determined by the collar.
Claim 8
Dependent Claim
27 words
The filter as claimed in claim 2, further comprising a valve located on a top end of the inlet pipe for regulating the inflow of aquarium water.
Claim 9
Dependent Claim
30 words
The filter as claimed in claim 1, wherein the physical filter is comprised of: a strainer; a coarse sponge; and a filter cartridge all in alignment throughout the filtering chamber.
Claim 10
Dependent Claim
17 words
The filter as claimed in claim 1, wherein the medium within the aerobic chamber is thermoplastic tubules.
Claim 11
Dependent Claim
145 words
An aerobic filter means for biological filtration of contaminated aquarium water in an aquarium tank in combination with a filter means for physical filtration of aquarium water, the combination comprising: means for positioning both the aerobic filter means and filter means for physical filtration entirely on an exterior side wall of the aquarium tank; means for conducting the water exiting the filter means for physical filtration to both the aquarium tank and the aerobic filter means, said means for conducting being positioned on a top side of the filter means; and means for drawing water from the aquarium tank and delivering the water drawn to the filter means for physical filtration, wherein the means for drawing also collects water filtered by the aerobic filter means and delivers the filtered water directly to the filter means for physical filtration for being physically filtered an additional time.
Claim 12
Dependent Claim
145 words
An aerobic filter means for biological filtration of contaminated aquarium water in an aquarium tank in combination with a filter means for physical filtration of aquarium water, the combination comprising: means for positioning both the aerobic filter means and filter means for physical filtration entirely on an exterior side wall of the aquarium tank; means for conducting the water exiting the filter means for physical filtration to both the aquarium tank and the aerobic filter means, said means for conducting being positioned on a top side of the filter means; and means for drawing water from the aquarium tank and delivering the water drawn to the filter means for physical filtration, wherein the means for drawing also collects water filtered by the aerobic filter means and delivers the filtered water directly to the filter means for physical filtration for being physically filtered an additional time.
Claim 13
Dependent Claim
60 words
A combination filter as claimed in claim 10, wherein the means for conducting comprises first and second spillways, the first spillway is positioned to overhang the aquarium tank for conducting water back to the aquarium tank by gravity flow and the second spillway is positioned to overhang the aerobic filter for conducting water to the aerobic filter by gravity flow.
Claim 14
Dependent Claim
65 words
A combination filter as claimed in claim 11, wherein the means for conducting comprises an inlet tube, a passageway connected at a base of the inlet tube and a pump means also connected at the base of the inlet tube, and wherein aquarium water is pumped into the inlet tube by the pump means and delivered to the filter for physical filtration through the passageway.
Claim 15
Dependent Claim
54 words
A combination filter as claimed in claim 12, wherein the inlet tube includes a hole at its base and a floating collar slidably positioned around the inlet tube for regulating the flow of water from the aerobic filter through the hole and into the inlet tube for delivery to the filter for physical filtration.
Claim 16
Dependent Claim
28 words
The combination of claim 13, wherein a medium for supporting bacteria growth is positioned in the aerobic filter so water entering the aerobic filter passes through the medium.
Claim 17
Dependent Claim
37 words
The combination filter of claim 14, further comprising dispersion means positioned on a top side of the aerobic filter for distributing the flow of water conducted to the aerobic filter providing more uniform trickling through the medium.
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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) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |