US5190404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical drainage device
Assignee: Mitsui Chemicals Inc
•
Filing: 1991-06-06
•
Granted: 1993-03-02
•
Expires: 2011-06-06
Abstract
Abstract A vertical drainage device including a generally plate-like elongated conduit member formed of a synthetic resin and a non-woven fabric attached to the conduit member. The vertical drainage device is adapted to be embedded into soil in a vertical direction coincident with a longitudinal direction of the conduit member and adapted to suck up water existing in the soil. The conduit member is comprised of a plurality of parallel vertical ribs extending in the longitudinal direction of the conduit member and a plurality of transverse ribs extending in a transverse direction of the conduit member for connecting the vertical ribs together. A spacing 1 between the adjacent ones of the vertical ribs is set to a 0.5 mm-5 mm, so as to define a conduit space between the adjacent vertical ribs. Accordingly, a drainage efficiency of the vertical drainage device can be greatly improved.
Inventors
- 👤 Nobuo Kiyokawa
- 👤 Jun Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:51
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/10; E02B; E02B11/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
129 words
A vertical drainage device including a generally plate-like elongated conduit member formed of a synthetic resin and a non-woven fabric attached to said conduit member, said vertical drainage device being adapted to be embedded into soil in a vertical direction coincident with a longitudinal direction of said conduit member and adapted to suck up water existing in the soil; said conduit member comprising a plurality of parallel vertical ribs extending in the longitudinal direction of said conduit member and a plurality of transverse ribs extending in a transverse direction of said conduit member for connecting said vertical ribs together; wherein a spacing 1 between the adjacent ones of said vertical ribs is set to 0.5 mm-5 mm, so as to define a conduit space between the adjacent vertical ribs.
Claim 2
Dependent Claim
129 words
A vertical drainage device including a generally plate-like elongated conduit member formed of a synthetic resin and a non-woven fabric attached to said conduit member, said vertical drainage device being adapted to be embedded into soil in a vertical direction coincident with a longitudinal direction of said conduit member and adapted to suck up water existing in the soil; said conduit member comprising a plurality of parallel vertical ribs extending in the longitudinal direction of said conduit member and a plurality of transverse ribs extending in a transverse direction of said conduit member for connecting said vertical ribs together; wherein a spacing 1 between the adjacent ones of said vertical ribs is set to 0.5 mm-5 mm, so as to define a conduit space between the adjacent vertical ribs.
Claim 3
Dependent Claim
19 words
The vertical drainage device as defined in claim 1, wherein said spacing 1 is set to 1 mm-3 mm.
Claim 4
Dependent Claim
28 words
The vertical drainage device as defined in claim 1, wherein a cross sectional area of said conduit space is set to 0.5 mm 2 -75 mm 2 .
Claim 5
Dependent Claim
26 words
The vertical drainage device as defined in claim 1, wherein a thickness (height) h of each of said vertical ribs is set to 1 mm-15 mm.
Claim 6
Dependent Claim
25 words
The vertical drainage device as defined in claim 1, wherein a width m of each of said vertical ribs is set to 0.1 mm-5 mm.
Claim 7
Dependent Claim
27 words
The vertical drainage device as defined in claim 1, wherein a thickness (height) h 2 of each of said transverse ribs is set to 1 mm-30 mm.
Claim 8
Dependent Claim
25 words
The vertical drainage device as defined in claim 1, wherein a width t of each of said transverse ribs is set to 0.1 mm-10 mm.
Claim 9
Dependent Claim
27 words
The vertical drainage device as defined in claim 1, wherein a spacing n between the adjacent ones of said transverse ribs is set to 1 mm-20 mm.
Claim 10
Dependent Claim
42 words
The vertical drainage device as defined in claim 1, wherein an elongated space is defined between the adjacent ones of said transverse ribs, and a cross sectional area of said elongated space is set to 1 mm 2 -600 mm 2 .
Claim 11
Dependent Claim
22 words
The vertical drainage device as defined in claim 1, wherein said transverse ribs intersect said vertical ribs at an angle of 20°-70°.
Claim 12
Dependent Claim
29 words
The vertical drainage device as defined in claim 1, wherein sectional shapes of said vertical ribs and said transverse ribs are selected from rectangular, circular, semicircular, and polygonal shapes.
Claim 13
Dependent Claim
25 words
The vertical drainage device as defined in claim 1, wherein said non-woven fabric is formed of polyolefin, and is manufactured by a spun bond method.
Claim 14
Dependent Claim
33 words
The vertical drainage device as defined in claim 1, wherein said non-woven fabric is a continuous long-fiber non-woven fabric having a bulkiness of 10-200 g/m 2 and a fineness of 0.5-30 deniers (D).
Claim 15
Dependent Claim
19 words
The vertical drainage device as defined in claim 1, wherein said non-woven fabric is an embossed long-fiber non-woven fabric.
Claim 16
Dependent Claim
43 words
The vertical drainage device as defined in claim 1, wherein a height h 2 of each of said transverse ribs is set to 1/2 or more times a height h of each of said vertical ribs and less than twice said height h.
Claim 17
Dependent Claim
161 words
A vertical drainage device including a generally plate-like elongated conduit member formed of a synthetic resin and a non-woven fabric attached to said conduit member, said vertical drainage being adapted to be embedded into soil in a vertical direction coincident with a longitudinal direction of said conduit member and adapted to suck up water existing in the soil; said conduit member comprising a plurality of parallel vertical ribs extending in the longitudinal direction of said conduit member and a plurality of transverse ribs extending in a transverse direction of said conduit member for connecting said vertical ribs together; wherein a spacing 1 between the adjacent ones of said vertical ribs is set to 1.0-3 mm, so as to define a condiut space between the adjacent vertical ribs and a height h 2 of each of said transverse ribs is set to 1/2 or less times a height h of each of said vertical ribs and less than twice said height h.
Claim 18
Dependent Claim
161 words
A vertical drainage device including a generally plate-like elongated conduit member formed of a synthetic resin and a non-woven fabric attached to said conduit member, said vertical drainage being adapted to be embedded into soil in a vertical direction coincident with a longitudinal direction of said conduit member and adapted to suck up water existing in the soil; said conduit member comprising a plurality of parallel vertical ribs extending in the longitudinal direction of said conduit member and a plurality of transverse ribs extending in a transverse direction of said conduit member for connecting said vertical ribs together; wherein a spacing 1 between the adjacent ones of said vertical ribs is set to 1.0-3 mm, so as to define a condiut space between the adjacent vertical ribs and a height h 2 of each of said transverse ribs is set to 1/2 or less times a height h of each of said vertical ribs and less than twice said height h.
Claim 19
Dependent Claim
22 words
The vertical drainage device as defined in claim 16 wherein said transverse ribs intersect said vertical ribs at an angle of 20°-70°.
Claim 20
Dependent Claim
29 words
The vertical drainage device as defined in claim 16 wherein sectional shapes of said vertical ribs and said transverse ribs are selected from rectangular, circular, semi-circular, and polygonal shapes.
Claim 21
Dependent Claim
25 words
The vertical drainage device as defined in claim 16, wherein said non-woven fabric is formed of polyolefin, and is manufactured by a spun bond method.
References Cited (Backward Citations)
US3403519A
Cited
US3795180A
Cited
US3563038A
Cited
US3654765A
Cited
JPS57137516A
Cited
US4622138A
Cited
US4704048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-01 | 1996-08-31 | 1997-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-01 | 2000-08-31 | 2001-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-01 | 2004-08-31 | 2005-03-02 | $7700.00 | Window Closed / Lapsed |