Patent US4600508A successfully refreshed from Google Patents.
US4600508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contamination removal system
Assignee: Foster Wheeler Energy Corp
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Filing: 1984-02-21
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Granted: 1986-07-15
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Expires: 2004-02-21
Abstract
Abstract A system and method for removing contaminated fluid from the ground in which water is pumped through a perforated pipe system into the ground to be decontaminated. The water and the contaminants are then drawn into a second pipe system and to a treatment unit for separating the contaminants from the water before the latter is returned to the first perforated pipe system.
Inventors
- 👤 Kenneth A. DeGhetto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:29
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/30; B; B09; B09C; B09C1/00; B09C1/02; E21B21/00; E21B21/10; E21B7/00; E21B7/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
240 words
A system for removing contaminants from the ground comprising a first network of vertically extending perforated risers extending into the ground; means for pumping water through said risers for discharging the water through said perforations and into said ground such that the water absorbs the contaminants; a second network of vertically extending perforated risers disposed in said ground in the vicinity of said first network of risers; vacuum means for drawing water, along with the absorbed contaminants, through the perforations of said second network of risers; means defining at least one discharge slot at the lower end portion of each of said risers; a valve unit disposed in each riser for controlling the flow of water through said riser and said slots, each valve unit including a pair of spaced valve seats, and a valve member moveable in said riser between said valve seats, said valve unit and said valve seats being configured to permit a relatively high velocity discharge of water from said slots of the risers connected to said pumping means to facilitate installation of said risers into said ground, and to prevent flow into said slots of the risers connected to said vaccuum means to prevent the ingress of solid materials into said risers; means connected to said second pipe network for removing the contaminants from said water; and means connecting the contaminant-removal means to said pumping means for recirculating said water through said first pipe network.
Claim 2
Independent Claim
240 words
A system for removing contaminants from the ground comprising a first network of vertically extending perforated risers extending into the ground; means for pumping water through said risers for discharging the water through said perforations and into said ground such that the water absorbs the contaminants; a second network of vertically extending perforated risers disposed in said ground in the vicinity of said first network of risers; vacuum means for drawing water, along with the absorbed contaminants, through the perforations of said second network of risers; means defining at least one discharge slot at the lower end portion of each of said risers; a valve unit disposed in each riser for controlling the flow of water through said riser and said slots, each valve unit including a pair of spaced valve seats, and a valve member moveable in said riser between said valve seats, said valve unit and said valve seats being configured to permit a relatively high velocity discharge of water from said slots of the risers connected to said pumping means to facilitate installation of said risers into said ground, and to prevent flow into said slots of the risers connected to said vaccuum means to prevent the ingress of solid materials into said risers; means connected to said second pipe network for removing the contaminants from said water; and means connecting the contaminant-removal means to said pumping means for recirculating said water through said first pipe network.
Claim 3
Dependent Claim
36 words
The system of claim 1 further comprising a cross-header and two headers connected to the respective ends of said cross-header to form a substantially U-shaped configuration, said first network of risers being connected to said headers.
Claim 4
Dependent Claim
30 words
The system of claim 2 further comprising a cross-header, and a plurality of headers connected to said cross-header and to said risers of said first and second network of risers.
Claim 5
Independent Claim
39 words
The system of claims 2 or 3 wherein said pumping means comprises a pump, and means connecting said pump to the cross-header associated with said first network of risers for distributing said water through the corresponding headers and risers.
Claim 6
Dependent Claim
16 words
The system of claim 1 further comprising a header connected to said second network of risers.
Claim 7
Independent Claim
21 words
The system of claims 2 or 5 wherein said headers extend horizontally and rest on the upper surface of said ground.
Claim 8
Independent Claim
46 words
The system of claims 3 or 5 wherein said vacuum means comprises a vacuum pump and means connecting said vacuum pump to the headers associated with said second network of risers for drawing said water and said contaminants into and through the corresponding risers and headers.
Claim 9
Dependent Claim
22 words
The system of claim 1 further comprising storage means connected to said contaminant-removal means for receiving said water from said contaminant-removal means.
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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |