Patent US5255998A successfully refreshed from Google Patents.
US5255998A
Expired / Lapsed
US
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Multiple-layer net structure for fluid drainage, particularly for geotechnical use
Assignee: RDB Plastotecnica SpA
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Filing: 1992-11-06
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Granted: 1993-10-26
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Expires: 2012-11-06
Abstract
Abstract The multiple-layer net structure has a first layer of mutually parallel wires which is rigidly associated with a second or intermediate layer of substantially mutually parallel wires, which are inclined with respect to the wires of the first layer. A third layer of wires is rigidly associated with the intermediate layer, on the opposite side thereof with respect to the first layer, and has substantially mutually parallel wires which are inclined with respect to the wires of the second or intermediate layer.
Inventors
- 👤 Mario Beretta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:10
CPC Classifications
E; E02; E02B; E02B11/00; E02D; E02D3/00; E02D3/02; E02D3/10; Y; Y10; Y10S; Y10S139/00; Y10S139/01; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/109
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
193 words
Fluid drainage net for geotechnical use comprising; a first layer of sires arranged substantially parallel to each other and defining a plane of lay; a second layer of wires arranged substantially parallel to each other and superimposed on said first layer of wires parallel to said plane of lay, said second layer of wires being inclined with respect to said first layer of wires, and connected thereto at a plurality of intersection nodes, said intersection nodes extending substantially perpendicular to said plane of lay; a third layer of wires arranged substantially parallel to each other and superimposed on said second layer of wires, said third layer of wires being inclined with respect to said first layer of wires and said second layer of wires and connected to said second layer of wires at said intersection nodes; wherein said first layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in one direction, wherein said third layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in an opposite direction.
Claim 2
Dependent Claim
193 words
Fluid drainage net for geotechnical use comprising; a first layer of sires arranged substantially parallel to each other and defining a plane of lay; a second layer of wires arranged substantially parallel to each other and superimposed on said first layer of wires parallel to said plane of lay, said second layer of wires being inclined with respect to said first layer of wires, and connected thereto at a plurality of intersection nodes, said intersection nodes extending substantially perpendicular to said plane of lay; a third layer of wires arranged substantially parallel to each other and superimposed on said second layer of wires, said third layer of wires being inclined with respect to said first layer of wires and said second layer of wires and connected to said second layer of wires at said intersection nodes; wherein said first layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in one direction, wherein said third layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in an opposite direction.
Claim 3
Dependent Claim
23 words
Fluid drainage net for geotechnical use according to claim 1, wherein said drainage net has an overall thickness in excess of three millimeters.
Claim 4
Dependent Claim
52 words
Fluid drainage net for geotechnical use according to claim 1, wherein said first layer of wires and said third layer of wires have thickness dimensions, said second layer having a thickness substantially equal to a sum of said thickness dimensions of said first layer of wires and said third layer of wires.
Claim 5
Dependent Claim
57 words
Fluid drainage net for geotechnical use according to claim 1, wherein said first layer of wires is inclined to an angle of 90 degrees with respect to said third layer of wires, and wherein said first and third layer of wires are inclined at an angle of 45 degrees with respect to said second layer of wires.
Claim 6
Dependent Claim
30 words
Fluid drainage net for geotechnical use according to claim 1, wherein said first layer of wires, said second layer of wires and said third layer of wires are formed monolithically.
Claim 7
Dependent Claim
29 words
Fluid drainage net for geotechnical use according to claim 1, further comprising a membrane connected to one of said first layer of wires and said second layer of wires.
Claim 8
Dependent Claim
31 words
Fluid drainage net for geotechnical use according to claim 1, further comprising a membrane connected to said first layer of wires and a membrane connected to said second layer of wires.
Claim 9
Dependent Claim
226 words
Fluid drainage net for geotechnical use comprising; a first layer of wires arranged substantially parallel to each other and defining a plane of lay; a second layer of wires arranged substantially parallel to each other and superimposed on said first layer of wires parallel to said plane of lay, said second layer of wires being inclined with respect to said first layer of wires, and connected thereto at a plurality of intersection nodes, said intersection nodes extending perpendicular to said plane of lay; a third layer of wires arranged substantially parallel to each other and superimposed on said second layer of wires, said third layer of wires being inclined with respect to said first layer of wires and said second layer of wires and connected to said second layer of wires at said intersection nodes; wherein said first layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in one direction, said third layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in an opposite direction, and wherein said drainage net has an overall thickness in excess of three millimeters and wherein said first layer of wires, said second layer of wires and said third layer of wires are formed monolithically.
Claim 10
Dependent Claim
226 words
Fluid drainage net for geotechnical use comprising; a first layer of wires arranged substantially parallel to each other and defining a plane of lay; a second layer of wires arranged substantially parallel to each other and superimposed on said first layer of wires parallel to said plane of lay, said second layer of wires being inclined with respect to said first layer of wires, and connected thereto at a plurality of intersection nodes, said intersection nodes extending perpendicular to said plane of lay; a third layer of wires arranged substantially parallel to each other and superimposed on said second layer of wires, said third layer of wires being inclined with respect to said first layer of wires and said second layer of wires and connected to said second layer of wires at said intersection nodes; wherein said first layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in one direction, said third layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in an opposite direction, and wherein said drainage net has an overall thickness in excess of three millimeters and wherein said first layer of wires, said second layer of wires and said third layer of wires are formed monolithically.
Claim 11
Dependent Claim
52 words
Fluid drainage net for geotechnical use according to claim 8, wherein said first layer of wires and said third layer of wires have thickness dimensions, said second layer having a thickness substantially equal to a sum of said thickness dimensions of said first layer of wires and said third layer of wires.
Claim 12
Dependent Claim
57 words
Fluid drainage net for geotechnical use according to claim 8, wherein said first layer of wires is inclined at an angle of 90 degrees with respect to said third layer of wires, and wherein said first and third layer of wires are inclined at an angle of 45 degrees with respect to said second layer of wires.
Claim 13
Dependent Claim
29 words
Fluid drainage net for geotechnical use according to claim 8, further comprising a membrane connected to one of said first layer of wires and said second layer of wires.
Claim 14
Dependent Claim
31 words
Fluid drainage net for geotechnical use according to claim 8, further comprising a membrane connected to said first layer of wires and a membrane connected to said second layer of wires.
Claim 15
Dependent Claim
234 words
A geotechnical fluid drainage method comprising the steps of; (a) providing a drainage net comprising; a first layer of wires arranged substantially parallel to each other and defining a plane of lay; a second layer of wires arranged substantially parallel to each other and superimposed on said first layer of wires parallel to said plane of lay, said second layer of wires being inclined with respect to said first layer of wires, and connected thereto at a plurality of intersection nodes, said intersection nodes extending perpendicular to said plane of lay, and; a third layer of wires arranged substantially parallel to each other and superimposed on said second layer of wires, said third layer of wires being inclined with respect to said first layer of wires and said second layer of wires and connected to said second layer of wires at said intersection nodes; wherein said first layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in one direction, wherein said third layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in an opposite direction; (b) arranging said net in a medium to be drained on an inclined plane, and (c) orienting said second layer of wires in alignment with a direction of fluid flow through said medium.
Claim 16
Dependent Claim
234 words
A geotechnical fluid drainage method comprising the steps of; (a) providing a drainage net comprising; a first layer of wires arranged substantially parallel to each other and defining a plane of lay; a second layer of wires arranged substantially parallel to each other and superimposed on said first layer of wires parallel to said plane of lay, said second layer of wires being inclined with respect to said first layer of wires, and connected thereto at a plurality of intersection nodes, said intersection nodes extending perpendicular to said plane of lay, and; a third layer of wires arranged substantially parallel to each other and superimposed on said second layer of wires, said third layer of wires being inclined with respect to said first layer of wires and said second layer of wires and connected to said second layer of wires at said intersection nodes; wherein said first layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in one direction, wherein said third layer of wires is inclined by an angle of from 20 to 70 degrees with respect to said second layer of wires in an opposite direction; (b) arranging said net in a medium to be drained on an inclined plane, and (c) orienting said second layer of wires in alignment with a direction of fluid flow through said medium.
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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) | 1996-10-25 | 1997-04-26 | 1997-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-25 | 2001-04-26 | 2001-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-25 | 2005-04-26 | 2005-10-26 | $7700.00 | Window Closed / Lapsed |