Patent US6315897B1 successfully refreshed from Google Patents.
US6315897B1
Expired / Lapsed
US
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Rain water run-off filtering system
Assignee: Eastern States Associates
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Filing: 2000-05-23
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Granted: 2001-11-13
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Expires: 2020-05-23
Abstract
Abstract A rain water run-off filtering system includes a tank for holding and filtering run-off water, said tank being generally cylindrical with a horizontal axis, and having at least one manway for the introduction of water and a filter media. A horizontal grate disposed at the bottom of the tank, supports a bed of gravel and sand, and incoming water is directed onto the sand bed, thence percolating through the sand to a space below the grate. The outflow of water from the tank is regulated by a baffle plate bounding the sand bed. This plate has small holes for normally producing a small outflow, and at least one large aperture for permitting water to flow through the tank, without percolating through the sand, during extremely heavy rains.
Inventors
- 👤 Kevin Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:41
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D24/12; E; E03; E03F; E03F1/00; E03F1/002; E03F11/00; B01D2201/00; B01D2201/48; C; C02; C02F; C02F2103/00; C02F2103/001; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/208
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
A rain water run-off filtering system comprising a tank for holding and filtering run-off water, said tank being generally cylindrical with a horizontal axis, a pair of vertical partitions defining inlet, outlet and filter chambers within the tank, a weir plate disposed within the filter chamber, and a filter extending between the weir plate and the partition defining the outlet chamber, said filter comprising a horizontal grate disposed near the bottom of the tank for supporting a bed of aggregate, said weir directing incoming water over the aggregate bed, whereby water percolates through the aggregate to a space below the grate, thence to an outlet pipe in communication with said space.
Claim 2
Dependent Claim
111 words
A rain water run-off filtering system comprising a tank for holding and filtering run-off water, said tank being generally cylindrical with a horizontal axis, a pair of vertical partitions defining inlet, outlet and filter chambers within the tank, a weir plate disposed within the filter chamber, and a filter extending between the weir plate and the partition defining the outlet chamber, said filter comprising a horizontal grate disposed near the bottom of the tank for supporting a bed of aggregate, said weir directing incoming water over the aggregate bed, whereby water percolates through the aggregate to a space below the grate, thence to an outlet pipe in communication with said space.
Claim 3
Dependent Claim
36 words
The invention of claim 1 , further comprising at least one aperture in the outlet chamber partition, above the top of the filter bed, for permitting water to bypass the filter bed during extremely heavy rains.
Claim 4
Dependent Claim
18 words
The invention of claim 1 , wherein the filter bed comprises alternating layers of fine and coarse aggregate.
Claim 5
Dependent Claim
14 words
The invention of claim 3 , further comprising pieces of fabric between said layers.
Claim 6
Dependent Claim
18 words
The invention of claim 1 , further comprising a piece of fabric between said grate and said aggregate.
Claim 7
Dependent Claim
34 words
The invention of claim 1 , further comprising an overflow pipe extending through said tank and having one end terminating within the inlet chamber at a level below a top edge of said weir.
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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) | 2004-11-12 | 2005-05-14 | 2005-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-12 | 2009-05-14 | 2009-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-12 | 2013-05-14 | 2013-11-13 | $7700.00 | Window Closed / Lapsed |