Patent US4745801A successfully refreshed from Google Patents.
US4745801A
Expired / Lapsed
US
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Groundwater sampling system
Assignee: Individual
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Filing: 1986-06-03
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Granted: 1988-05-24
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Expires: 2006-06-03
Abstract
Abstract A multi-level groundwater sampling system utilizes a multiplicity of small diameter flexible sampling tubes terminating at their lower ends at different depths in a single small diameter drill hole, the lower end section of each sampling tube being perforated and loosely wrapped with fine mesh flexible cloth screen secured to the perforated tube section by longitudinally spaced ties, so that the cloth may flex inward and outward to assist in removing potential screen-plugging silt or other finely particulate solids. The upper ends of the sampling tubes are available for connection to a vacuum pump for collection of groundwater samples. The upper ends of the sampling tubes also may be coupled to a manifold connected to a vacuum pump for measuring groundwater pressures.
Inventors
- 👤 James E. Luzier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:14
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/084; E21B43/00; E21B43/02; E21B43/08; E21B43/084; E21B47/00; E21B47/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
118 words
A groundwater sampling system, comprising: (a) a plurality of elongated small diameter flexible sampling tubes each having inner and outer ends and with the inner ends of the tubes arranged to extend into a test site and terminate at said inner ends at different locations, (b) a section of the inner end of each sampling tube being perforated, and (c) fine mesh flexible cloth screen material secured to and loosely encircling said perforated section to allow flexing of the screen material toward and away from the sampling tube, to minimize collection of solid materials on the screen material, the outer end of each sampling tube being exposed outwardly of the test site for collection of groundwater samples therefrom.
Claim 2
Dependent Claim
118 words
A groundwater sampling system, comprising: (a) a plurality of elongated small diameter flexible sampling tubes each having inner and outer ends and with the inner ends of the tubes arranged to extend into a test site and terminate at said inner ends at different locations, (b) a section of the inner end of each sampling tube being perforated, and (c) fine mesh flexible cloth screen material secured to and loosely encircling said perforated section to allow flexing of the screen material toward and away from the sampling tube, to minimize collection of solid materials on the screen material, the outer end of each sampling tube being exposed outwardly of the test site for collection of groundwater samples therefrom.
Claim 3
Dependent Claim
33 words
The groundwater sampling system of claim 1 wherein the flexible cloth screen material loosely encircles the perforated section of sampling tube and is secured thereto by a plurality of longitudinally spaced encircling retainers.
Claim 4
Dependent Claim
25 words
The groundwater sampling system of claim 1 wherein the flexible cloth screen includes a plurality of wraps loosely encircling the perforated section of sampling tube.
Claim 5
Dependent Claim
43 words
The groundwater sampling system of claim 1 including a check valve in the inner end of each sampling tube inwardly of the perforated section and operable to open at elevated pressure to allow expulsion of solids from the interior of the perforated section.
Claim 6
Dependent Claim
45 words
The groundwater sampling system of claim 1 wherein the sampling tubes extend vertically downward from ground level and terminate at their lower ends at different depths, the upper end of each tube being exposed for connection to a pump for collection of groundwater samples therefrom.
Claim 7
Dependent Claim
15 words
The groundwater sampling system of claim 5 wherein the pump is of the peristaltic type.
Claim 8
Dependent Claim
21 words
The groundwater sampling system of claim 5 wherein the mesh size of the cloth screen ranges between about 30 and 150.
Claim 9
Dependent Claim
18 words
The groundwater sampling system of claim 5 wherein the mesh size of the cloth screen is about 60.
Claim 10
Dependent Claim
25 words
The groundwater sampling system of claim 5 wherein the flexible cloth screen includes a plurality of wraps loosely encircling the perforated section of sampling tube.
Claim 11
Dependent Claim
33 words
The groundwater sampling system of claim 5 wherein the flexible cloth screen material loosely encircles the perforated section of sampling tube and is secured thereto by a plurality of longitudinally spaced encircling retainers.
Claim 12
Dependent Claim
43 words
The groundwater sampling system of claim 5 including a check valve in the inner end of each sampling tube inwardly of the perforated section and operable to open at elevated pressure to allow expulsion of solids from the interior of the perforated section.
Claim 13
Dependent Claim
34 words
The groundwater sampling system of claim 5 including a manifold arranged to couple the outer ends of the sampling tubes to a source of vacuum for measuring the groundwater pressure in the sampling tubes.
Claim 14
Dependent Claim
42 words
The groundwater sampling system of claim 5 wherein the sampling tubes initially extend vertically downward in a drill hole having a diameter ranging between about 7 and 15 centimeters, the sampling tubes having a diameter ranging between about 4 and 13 millimeters.
Claim 15
Dependent Claim
29 words
The groundwater sampling system of claim 13 wherein the diameter of the drill hole is about 10 centimeters and the diameter of each sampling tube is about 5 millimeters.
Claim 16
Dependent Claim
22 words
The groundwater sampling system of claim 13 wherein the number of sampling tubes in the drill hole ranges between 2 and 40.
Claim 17
Dependent Claim
66 words
The groundwater sampling system of claim 13 wherein the drill hole extends vertically downward from ground level, the mesh size of the cloth screen material is about 60, the flexible cloth screen material includes a plurality of wraps loosely encircling the perforated section of sampling tube and is secured thereto by a plurality of longitudinally spaced encircling ties, and the pump is of the peristaltic type.
References Cited (Backward Citations)
US2605637A
Cited
US3240067A
Cited
DE2101234A1
Cited
US3930754A
Cited
SU578583A1
Cited
US4015479A
Cited
US4112768A
Cited
US4192181A
Cited
US4585060A
Cited
US4585060B1
Cited
US4548266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |