US4455105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure and means for creating a vertical drain
Assignee: TERRAFIGO A SWEDISH BODY CORPORATE AB
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Filing: 1981-05-21
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Granted: 1984-06-19
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Expires: 2001-05-21
Abstract
Abstract A procedure for creating a vertical drain by pushing into the ground an insertion tube (7) housing within itself a so-called prefabricated drain (9), by pulling out the insertion tube and cutting off the prefabricated drain. The prefabricated drain is cut off with a cross-cutting means located within the insertion tube (7) at such height, or in such a layer as for instance a sand stratum (3) which accepts the water conveyed by the prefabricated drain.
Inventors
- 👤 Mauno O. Juhola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:01
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/10; E02D3/103; E02B; E02B11/00; Y; Y10; Y10T; Y10T83/00; Y10T83/727; Y10T83/739; Y10T83/869; Y10T83/8821; Y10T83/8858
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
A method of creating a vertical drain in a first layer of soil located below a second layer of soil, comprising: pushing into the first layer an insertion tube carrying therewithin a prefabricated drain and cross-cutting means located within said tube adjacent its lower end, securing the lower end of the drain in the soil, raising the insertion tube to a height such that said cross-cutting means is in a location in said second layer, actuating said cross-cutting means at said location to cut-off the lower end of said drain, and pulling out said insertion tube from said second layer.
Claim 2
Independent Claim
100 words
A method of creating a vertical drain in a first layer of soil located below a second layer of soil, comprising: pushing into the first layer an insertion tube carrying therewithin a prefabricated drain and cross-cutting means located within said tube adjacent its lower end, securing the lower end of the drain in the soil, raising the insertion tube to a height such that said cross-cutting means is in a location in said second layer, actuating said cross-cutting means at said location to cut-off the lower end of said drain, and pulling out said insertion tube from said second layer.
Claim 3
Independent Claim
74 words
An apparatus for installing a vertical drain in a first layer of soil located below a second layer of soil, comprising: an insertion tube for receiving therein a prefabricated drain, means for pushing said insertion tube into said first layer of soil, cross-cutting means located within said insertion tube adjacent its lower end, said cross-cutting means including a cutting blade movable transverse to the tube, and a counter blade located opposite said cutting blade.
Claim 4
Independent Claim
74 words
An apparatus for installing a vertical drain in a first layer of soil located below a second layer of soil, comprising: an insertion tube for receiving therein a prefabricated drain, means for pushing said insertion tube into said first layer of soil, cross-cutting means located within said insertion tube adjacent its lower end, said cross-cutting means including a cutting blade movable transverse to the tube, and a counter blade located opposite said cutting blade.
Claim 5
Dependent Claim
57 words
An apparatus according to claim 2 comprising a cylinder arranged transverse to said insertion tube, said cutting blade being located at the lower portion of said cylinder, a stationary piston affixed to said insertion tube for guiding said cylinder, and means for introducing a pressurized fluid into said cylinder from the upper end of said insertion tube.
Claim 6
Dependent Claim
22 words
The apparatus according to claim 3, including spring means cooperating with said cylinder for returning said cutting blade to an initial position.
Claim 7
Dependent Claim
26 words
An apparatus according to claim 2, wherein said cutting blade is rotatably journalled in said tube, and sprocket wheel and chain means for rotating said blade.
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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) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |