Patent US4720209A successfully refreshed from Google Patents.
US4720209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drywell structure
Assignee: Individual
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Filing: 1986-09-30
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Granted: 1988-01-19
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Expires: 2006-09-30
Abstract
Abstract A drywell structure for receiving drain water from a ground surface and directing it to subterranean levels for leaching the water into the subterranean soil is provided with a water filtration and intake assembly which filters silt and other foreign matter from the received drain water prior to its being directed to the subterranean soil.
Inventors
- 👤 Donald R. Iams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:29
CPC Classifications
E; E03; E03F; E03F1/00; E03F1/002
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
179 words
An improved drywell structure of the type having a liner means below a ground surface and having an open top in liquid receiving communication with the ground surface, said liner means defining a chamber for receiving drain water from the ground surface and directing it into a depending drain pipe means which leaches the water into subterranean soil, said improvement comprising: a drain water filtration and intake means in the chamber defined by the liner means and in liquid communication with the depending drain pipe means for filtration of silt and other foreign materials from the drain water prior to its being directed into the depending drain pipe means, said drain water filtration and intake means including. (a) a perforated intake pipe in the chamber defined by the liner means of the drywell structure, said intake pipe having one end which is in liquid communication with the depending drain pipe means and having a closed opposite end, and (b) a filtration fabric mounted on the periphery of said intake pipe so as to cover at least the perforations thereof.
Claim 2
Dependent Claim
179 words
An improved drywell structure of the type having a liner means below a ground surface and having an open top in liquid receiving communication with the ground surface, said liner means defining a chamber for receiving drain water from the ground surface and directing it into a depending drain pipe means which leaches the water into subterranean soil, said improvement comprising: a drain water filtration and intake means in the chamber defined by the liner means and in liquid communication with the depending drain pipe means for filtration of silt and other foreign materials from the drain water prior to its being directed into the depending drain pipe means, said drain water filtration and intake means including. (a) a perforated intake pipe in the chamber defined by the liner means of the drywell structure, said intake pipe having one end which is in liquid communication with the depending drain pipe means and having a closed opposite end, and (b) a filtration fabric mounted on the periphery of said intake pipe so as to cover at least the perforations thereof.
Claim 3
Dependent Claim
27 words
An improved drywell structure as claimed in claim 1 wherein said perforated intake pipe extends upwardly from the bottom of the liner means of the drywell structure.
Claim 4
Dependent Claim
44 words
An improved drywell structure as claimed in claim 2 wherein the lower end of said intake pipe is the one which is in liquid communication with the depending drain pipe means and the upper end of said intake pipe is the closed opposite end.
Claim 5
Dependent Claim
152 words
An improved drywell structure as claimed in claim 1 wherein said drain water filtration and intake means further comprises: (a) said intake pipe being mounted in a vertical attitude in the liner means of the drywall structure, said intake pipe having a bottom end which is the one that is in liquid communication with the depending drain pipe means, a top end which is the closed opposite end thereof and a plurality of apertures formed along its length to provide the perforations of said intake pipe; (b) a coupling fitting on the upper end of the depending drain pipe means, the bottom end of said intake pipe being mounted in said coupling fitting; (c) a cap on the top end of said intake pipe for closing thereof; and (d) said filtration fabric being wrapped about the periphery of said intake pipe so as to completely cover the periphery of said intake pipe.
Claim 6
Dependent Claim
42 words
An improved drywell structure as claimed in claim 4 wherein said filtration fabric has an upper end which is interposed between the top end of said intake pipe and said cap for holding the top end of said filter fabric in place.
Claim 7
Dependent Claim
43 words
An improved drywell structure as claimed in claim 4 wherein said filtration fabric has a lower end which is interposed between the bottom end of said intake pipe and said coupling fitting in which the bottom end of said intake pipe is mounted.
Claim 8
Dependent Claim
16 words
A drywell structure as claimed in claim 4 wherein said filtration fabric is a non-woven polyester.
Claim 9
Dependent Claim
16 words
A drywell structure as claimed in claim 4 wherein said filtration fabric is a non-woven polypropylene.
Claim 10
Dependent Claim
50 words
A drywell structure as claimed in claim 4 wherein said filtration fabric is formed of a non-woven synthetic resin having a grab strength of approximately 150 pounds, a trapezoid tear strength of at least 70-80 pounds and has a permeability which allows a flow rate of approximately 270 gallons/square foot/minute.
Claim 11
Dependent Claim
145 words
A drywell structure for receiving drain water from a ground surface and directing it to subterranean soils comprising in combination: (a) water receiving means defining a chamber and having an open top, said water receiving means being located below the ground surface for receiving drain water therefrom in its chamber; (b) drain pipe means having an upper end proximate the bottom of the chamber defined by said water receiving means and depending therefrom into the subterranean soils; and (c) drain water filtration and intake means in the chamber defined by said water receiving means and being in liquid communication with the upper end of said drain pipe means, said drain water filtration and intake means being for filtering silt and other foreign materials from the drain water received in the chamber of said water receiving means and directing filtered water to said drain pipe means.
Claim 12
Dependent Claim
145 words
A drywell structure for receiving drain water from a ground surface and directing it to subterranean soils comprising in combination: (a) water receiving means defining a chamber and having an open top, said water receiving means being located below the ground surface for receiving drain water therefrom in its chamber; (b) drain pipe means having an upper end proximate the bottom of the chamber defined by said water receiving means and depending therefrom into the subterranean soils; and (c) drain water filtration and intake means in the chamber defined by said water receiving means and being in liquid communication with the upper end of said drain pipe means, said drain water filtration and intake means being for filtering silt and other foreign materials from the drain water received in the chamber of said water receiving means and directing filtered water to said drain pipe means.
Claim 13
Dependent Claim
64 words
A drywell structure as claimed in claim 10 wherein said drain water filtration and intake means comprises: (a) a perforated intake pipe in the chamber of said water receiving means and having one end coupled to the upper end of said drain pipe means; and (b) a filtration fabric mounted on the periphery of said intake pipe so as to cover the perforations thereof.
Claim 14
Dependent Claim
28 words
A drywell structure as claimed in claim 11 wherein said perforated intake pipe is elongated and is vertically disposed in the chamber defined by said water receiving means.
Claim 15
Dependent Claim
60 words
A drywell structure as claimed in claim 12 and further comprising: (a) a coupling fitting means on the upper end of said drain pipe means; (b) said intake pipe having the one end thereof mounted in said coupling fitting and having an opposite top end; and (c) a cap on the top end of said intake pipe for closing thereof.
Claim 16
Dependent Claim
107 words
A drywell structure as claimed in claim 10 wherein said drain water filtration and intake means comprises: (a) an elongated perforated intake pipe mounted in a substantially vertical attitude in the chamber of said water receiving means, said intake pipe having a bottom end and a top end; (b) a coupling fitting means on the upper end of said drain pipe means and having the bottom end of said intake pipe mounted therein; (c) a cap on the top end of said intake pipe for closing thereof; and (d) a filtration fabric wrapped about the periphery of said intake pipe so as to cover the periphery thereof.
Claim 17
Dependent Claim
31 words
A drywell structure as claimed in claim 14 wherein said filtration fabric has an upper end which is held in place by being interposed between said intake pipe and said cap.
Claim 18
Dependent Claim
33 words
A drywell structure as claimed in claim 14 wherein said filtration fabric has a lower end which is held in place by being interposed between said intake pipe and said coupling fitting means.
Claim 19
Dependent Claim
16 words
A drywell structure as claimed in claim 14 wherein said filtration fabric is a non-woven polyester.
Claim 20
Dependent Claim
16 words
A drywell structure as claimed in claim 14 wherein said filtration fabric is a non-woven polypropylene.
Claim 21
Dependent Claim
50 words
A drywell structure as claimed in claim 14 wherein said filtration fabric is formed of a non-woven synthetic resin having a grab strength of approximately 150 pounds, a trapezoid tear strength of at least 70-80 pounds and has a permeability which allows a flow rate of approximately 270 gallons/square foot/minute.
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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |