Patent US3738489A successfully refreshed from Google Patents.
US3738489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-pollution recirculation tank for marine and similar use
Assignee: Individual
•
Filing: 1971-05-24
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Granted: 1973-06-12
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Expires: 1991-05-24
Abstract
Abstract A recirculating tank suitable for receiving effluent from a marine head, or similar device, having an improved filter means comprising a filter element which is circumferentially surrounded by the holding tank primary chamber and has a bottom spaced above the bottom of the holding tank. As another feature, the improved filter construction is attached to only one wall of the holding tank and extends therein; to further extend its utility, the filter element is provided with a transparent visual inspection plate located on the exterior of the holding tank.
Inventors
- 👤 G Kraemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:15
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/016; B; B01; B01D; B01D29/00; B01D29/11; B01D29/31; B01D29/33; B01D29/62; B01D29/66; B01D29/665; B01D35/00; B01D35/02; B01D35/027; B01D35/0276; B01D35/14; B01D35/143; B01D2201/00; B01D2201/30; B01D2201/309; Y; Y10; Y10S; Y10S4/00; Y10S4/19
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
234 words
In a liquid waste collection system of the type including a toilet such as a marine head and a recirculating holding tank for receiving and storing waste effluent containing water and solids, the system including discharge means arranged to direct waste effluent from the toilet to the tank and a recirculation line arranged to carry clarified water from the tank to the toilet, the improvement wherein: 1. the holding tank includes a first wall, a bottom wall, and other walls which define a tank enclosure; 2. a filter is attached to the first wall of the tank, the filter having a perforated wall which is arranged inside the tank, the filter being spaced from the other walls of the tank to define a filter interior chamber separated from the interior of the tank, and the filter having a bottom portion spaced from the bottom wall of the tank; 3. the discharge is arranged in communication with the interior of the tank in the space between the walls of the tank and the perforated wall of the filter; 4. the recirculation line is arranged in communication with the filter interior chamber; and 5. solids from the waste effluent are stored in the space between the bottom portion Of the filter and the bottom wall of the holding tank, and water from the waste effluent is clarified by the filter for delivery through the recirculation line.
Claim 2
Dependent Claim
234 words
In a liquid waste collection system of the type including a toilet such as a marine head and a recirculating holding tank for receiving and storing waste effluent containing water and solids, the system including discharge means arranged to direct waste effluent from the toilet to the tank and a recirculation line arranged to carry clarified water from the tank to the toilet, the improvement wherein: 1. the holding tank includes a first wall, a bottom wall, and other walls which define a tank enclosure; 2. a filter is attached to the first wall of the tank, the filter having a perforated wall which is arranged inside the tank, the filter being spaced from the other walls of the tank to define a filter interior chamber separated from the interior of the tank, and the filter having a bottom portion spaced from the bottom wall of the tank; 3. the discharge is arranged in communication with the interior of the tank in the space between the walls of the tank and the perforated wall of the filter; 4. the recirculation line is arranged in communication with the filter interior chamber; and 5. solids from the waste effluent are stored in the space between the bottom portion Of the filter and the bottom wall of the holding tank, and water from the waste effluent is clarified by the filter for delivery through the recirculation line.
Claim 3
Dependent Claim
43 words
A holding tank in accordance with claim 1, wherein: the first wall of the tank includes an annular flange depending therefrom and extending into the interior of the tank, and wherein the perforated wall of the filter is attached to the annular flange.
Claim 4
Dependent Claim
62 words
a filter is attached to the first wall of the tank, the filter having a perforated wall which is arranged inside the tank, the filter being spaced from the other walls of the tank to define a filter interior chamber separated from the interior of the tank, and the filter having a bottom portion spaced from the bottom wall of the tank;
Claim 5
Dependent Claim
62 words
a filter is attached to the first wall of the tank, the filter having a perforated wall which is arranged inside the tank, the filter being spaced from the other walls of the tank to define a filter interior chamber separated from the interior of the tank, and the filter having a bottom portion spaced from the bottom wall of the tank;
Claim 6
Dependent Claim
28 words
the discharge is arranged in communication with the interior of the tank in the space between the walls of the tank and the perforated wall of the filter;
Claim 7
Dependent Claim
28 words
the discharge is arranged in communication with the interior of the tank in the space between the walls of the tank and the perforated wall of the filter;
Claim 8
Dependent Claim
54 words
A holding tank according to claim 2, further including: air vent passage means extending through the annular flange and the wall of the filter to provide an air passageway between the filter interior chamber and the interior of the tank, said air vent passage means being spaced from the first wall of the tank.
Claim 9
Dependent Claim
31 words
A holding tank constructed in accordance with claim 1, further including: a transparent inspection cover attached to the first wall of the tank and extending across the top of the filter.
Claim 10
Dependent Claim
13 words
the recirculation line is arranged in communication with the filter interior chamber; and
Claim 11
Dependent Claim
13 words
the recirculation line is arranged in communication with the filter interior chamber; and
Claim 12
Dependent Claim
42 words
solids from the waste effluent are stored in the space between the bottom portion Of the filter and the bottom wall of the holding tank, and water from the waste effluent is clarified by the filter for delivery through the recirculation line.
Claim 13
Dependent Claim
42 words
solids from the waste effluent are stored in the space between the bottom portion Of the filter and the bottom wall of the holding tank, and water from the waste effluent is clarified by the filter for delivery through the recirculation line.
Claim 14
Dependent Claim
29 words
A holding tank according to claim 2, further including: a transparent inspection cover attached to the first wall of the tank and extending across the top of the filter.
Claim 15
Dependent Claim
53 words
A holding tank according to claim 1, further including a back flush connection line leading from the wall of the tank into the filter interior chamber and spaced above the recirculation line, the back flush line being adapted for supply of clean water from an external surface for periodic cleansing of the tank.
References Cited (Backward Citations)
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 |