Patent US5441631A successfully refreshed from Google Patents.
US5441631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste treatment system
Assignee: STEGALL WILLIAM A SR
•
Filing: 1993-12-14
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Granted: 1995-08-15
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Expires: 2013-12-14
Abstract
Abstract A wastewater treatment system uses a primary treatment vessel and a secondary vessel with a filtration unit therebetween. Continuous backwashing of the filtration unit occurs when a well pump is activated to empty the secondary vessel. A portion of fluid discharged by the well pump backwashes the filter continuously as the secondary treatment vessel is emptied.
Inventors
- 👤 William A. Stegall, Sr.
- 👤 Marty Tittlebaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:13
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1242; B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D24/12; B01D24/38; B01D24/42; B01D24/46; B01D24/4631; B01D24/48; B01D24/4869; B01D37/00; C02F3/04; C02F3/046; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
257 words
A wastewater treatment system comprising: a) a treatment vessel having an interior area for containing a wastewater product to be treated; b) an influent line arranged for adding wastewater to be treated into the interior of said treatment vessel; c) an effluent line arranged for discharging treated wastewater from said treatment vessel; d) a filter for filtering treated wastewater effluent from said treatment vessel; e) said filter connected to said effluent line in order to receive treated wastewater via said effluent line; f) a filter discharge line arranged for transmitting filtered discharge to a collection vessel; g) said collection vessel arranged for collecting said filtered discharge; h) a pump arranged for emptying said collection vessel when it is filled with the filtered discharge; i) a means for controlling a flow of filtered discharge located within the discharge line for enabling a partial volume of liquid to flow in reverse direction through the filter discharge line to backwash the filter upon activation of said pump; j) a final discharge line arranged to receive pumped liquid from the collection vessel that does not flow in reverse direction to backwash the filter; k) a check valve located in the effluent line; l) a bypass line connecting the effluent line downstream of said check valve to the influent line; and m) said bypass line arranged to receive filter backwash flow from the backwash of the filter upon activation f said pump, and direct said backwash flow into said treatment vessel via said influent line for subsequent treatment in the treatment vessel.
Claim 2
Dependent Claim
257 words
A wastewater treatment system comprising: a) a treatment vessel having an interior area for containing a wastewater product to be treated; b) an influent line arranged for adding wastewater to be treated into the interior of said treatment vessel; c) an effluent line arranged for discharging treated wastewater from said treatment vessel; d) a filter for filtering treated wastewater effluent from said treatment vessel; e) said filter connected to said effluent line in order to receive treated wastewater via said effluent line; f) a filter discharge line arranged for transmitting filtered discharge to a collection vessel; g) said collection vessel arranged for collecting said filtered discharge; h) a pump arranged for emptying said collection vessel when it is filled with the filtered discharge; i) a means for controlling a flow of filtered discharge located within the discharge line for enabling a partial volume of liquid to flow in reverse direction through the filter discharge line to backwash the filter upon activation of said pump; j) a final discharge line arranged to receive pumped liquid from the collection vessel that does not flow in reverse direction to backwash the filter; k) a check valve located in the effluent line; l) a bypass line connecting the effluent line downstream of said check valve to the influent line; and m) said bypass line arranged to receive filter backwash flow from the backwash of the filter upon activation f said pump, and direct said backwash flow into said treatment vessel via said influent line for subsequent treatment in the treatment vessel.
Claim 3
Dependent Claim
75 words
The apparatus of claim 1 further comprising: a) a flow control line connected to said filter discharge line on both sides of a check valve; b) said flow control line arranged to direct said partial volume around said check valve when said pump is activated; and c) a flow control valve located within said flow control line arranged for regulating the amount of pump discharge flowing to backwash the filter upon activation of said pump.
Claim 4
Dependent Claim
48 words
The apparatus of claim 1 further comprising: a) a drip header system arranged for receiving treated, filtered liquid from said final discharge line upon pump activation; and b) said drip header system comprising a network of flow lines for distributing treated, filtered liquid over a selected expansive area.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1 wherein said treatment vessel is divided into upstream and downstream portions.
Claim 6
Dependent Claim
18 words
The apparatus of claim 1 wherein the pump is a well pump contained within the collection vessel interior.
Claim 7
Dependent Claim
27 words
The apparatus of claim 1 wherein it is further provided a level control means for activating the pump when the collection vessel is full of filtered liquid.
Claim 8
Dependent Claim
33 words
The apparatus of claim 1 wherein the treatment vessel is a sealed vessel having a top wall that closes the top of the vessel so that the treatment vessel can be installed underground.
Claim 9
Dependent Claim
32 words
The apparatus of claim 1 wherein collection vessel is a sealed vessel having a top wall that closes the top of the vessel so that the collection vessel can be installed underground.
Claim 10
Dependent Claim
22 words
The apparatus of claim 1 wherein the means for controlling a flow of filtered discharge comprises in part a flow control orifice.
Claim 11
Dependent Claim
42 words
The apparatus of claim 1 wherein the means for controlling filtered backwash enables a pre-selected volume of liquid discharged by the pump from the collection vessel to automatically backwash the filter each time the pump is activated to empty the collection vessel.
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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) | 1998-08-14 | 1999-02-13 | 1999-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-14 | 2003-02-13 | 2003-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-14 | 2007-02-13 | 2007-08-15 | $7700.00 | Window Closed / Lapsed |