Patent US6164868A successfully refreshed from Google Patents.
US6164868A
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US
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Prefabricated vertical earth drain with relief protrusions
Assignee: Individual
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Filing: 1999-04-19
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Granted: 2000-12-26
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Expires: 2019-04-19
Abstract
Abstract A prefabricated vertical earth drain which is provided with an elongated corrugated flexible plastic core sheet with vertical and horizontal dimensions of extension and horizontal corrugations which provide continuous longitudinally extending drain channels that extend in the vertical direction. These drain channels are defined with curved corrugation bends and a series of longitudinally spaced relief protrusions are provided in the channels. In use, the entire structure is surrounded with a filter fabric. The relief protrusions assist in preventing the protrusion of filter fabric into the drain channels.
Inventors
- 👤 R. Robert Goughnour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:11
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005; E02D; E02D3/00; E02D3/02; E02D3/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
A prefabricated vertical earth drain comprising: an elongated corrugated flexible plastic core sheet with vertical and horizontal dimensions of extension and having horizontal corrugations providing continuous longitudinally extending drain channels extending in the vertical direction and defined with curved corrugation bends, selected ones of said corrugation channels having a series of longitudinally spaced relief protrusions.
Claim 2
Dependent Claim
55 words
A prefabricated vertical earth drain comprising: an elongated corrugated flexible plastic core sheet with vertical and horizontal dimensions of extension and having horizontal corrugations providing continuous longitudinally extending drain channels extending in the vertical direction and defined with curved corrugation bends, selected ones of said corrugation channels having a series of longitudinally spaced relief protrusions.
Claim 3
Dependent Claim
21 words
The prefabricated vertical earth drain of claim 1 wherein said relief protrusions are continuously curved in their direction of horizontal extension.
Claim 4
Dependent Claim
47 words
The prefabricated vertical earth drain of claim 2 wherein the drain channels are defined by the curved corrugation bends through 180° arches and said relief protrusions are centered in the arches and extend in their direction of horizontal extension through an arch of approximately 120° to 180°.
Claim 5
Dependent Claim
17 words
The prefabricated vertical earth drain of claim 1 wherein said series of relief protrusions are uniformly spaced.
Claim 6
Dependent Claim
25 words
The prefabricated vertical earth drain of claim 4 wherein said series of relief protrusions are a saw-tooth configuration in longitudinal cross section along said channels.
Claim 7
Dependent Claim
25 words
The prefabricated vertical earth drain of claim 4 wherein said series of relief protrusions are a sinusoidal configuration in longitudinal cross section along said channels.
Claim 8
Dependent Claim
27 words
The prefabricated vertical earth drain of claim 4 wherein said series of relief protrusions have a longitudinal spacing which is shorter than that for said longitudinal corrugations.
Claim 9
Dependent Claim
17 words
The prefabricated vertical earth drain of claim 1 including filter fabric longitudinally surrounding said corrugated core sheet.
Claim 10
Dependent Claim
21 words
The prefabricated vertical earth drain of claim 8 wherein said relief protrusions are continuously curved in their direction of horizontal extension.
Claim 11
Dependent Claim
47 words
The prefabricated vertical earth drain of claim 9 wherein the drain channels are defined by the curved corrugation bends through 180° arches and said relief protrusions are centered in the arches and extend in their direction of horizontal extension through an arch of approximately 120° to 180°.
Claim 12
Dependent Claim
25 words
The prefabricated vertical earth drain of claim 1 wherein said relief protrusions are provided in adjacent corrugation channels and they protrude in the same direction.
Claim 13
Dependent Claim
30 words
The prefabricated vertical earth drain of claim 1 wherein said relief protrusions are provided in adjacent corrugation channels and the relief protrusions in adjacent channels earth protrude in opposite directions.
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) | 2003-12-26 | 2004-06-26 | 2004-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-26 | 2008-06-26 | 2008-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-26 | 2012-06-26 | 2012-12-26 | $7700.00 | Window Closed / Lapsed |