US4430027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a foundation with liquid tight joints
Assignee: Amcol International Corp
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Filing: 1981-08-26
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Granted: 1984-02-07
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Expires: 2001-08-26
Abstract
Abstract A method of constructing an in-ground liquid barrier in separate sections with liquid tight joints between the sections. A barrier area is excavated and the sections formed therein, preferrably by initially filling the excavation with a liquid sealing slurry and sequentially displacing portions of the slurry with a liquid impermeable barrier material to form barrier sections which are mutually abutting along leaky interfaces. A bore is drilled between adjacent sections in a direction generally transverse to the direction of leakage, and filled with a liquid sealing material to seal the joint. The sealing material preferrably comprises a dry, hydro-expandable bentonite composition which expands to form a slurry sealant by permitting liquid to seep between the barrier sections into the bore and contact the bentonite therein.
Inventors
- 👤 John Hughes
- 👤 Heinz Rasbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:01
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
In an isolation pipe adapted for vertical disposition between the side walls of a trench to form a removable bulkhead in a process of filling said trench with concrete or the like, the improvement for allowing easy removal of said isolation pipe while providing for an accurate and easily drilled positioning hole at the boundary of adjacent concrete sections, said improvement comprising: a tubular drill guide member releasably attached to the outer surface of said isolation pipe with the longitudinal axes thereof being in parallel relationship, said member being of an easily drillable material, having a diameter generally smaller than that of said positioning hole and being releasably attached to said isolation pipe such that said member will automatically release from said isolation pipe and remain in said concrete where positioned when said isolation pipe is pulled from said trench after said concrete is poured and set.
Claim 2
Dependent Claim
147 words
In an isolation pipe adapted for vertical disposition between the side walls of a trench to form a removable bulkhead in a process of filling said trench with concrete or the like, the improvement for allowing easy removal of said isolation pipe while providing for an accurate and easily drilled positioning hole at the boundary of adjacent concrete sections, said improvement comprising: a tubular drill guide member releasably attached to the outer surface of said isolation pipe with the longitudinal axes thereof being in parallel relationship, said member being of an easily drillable material, having a diameter generally smaller than that of said positioning hole and being releasably attached to said isolation pipe such that said member will automatically release from said isolation pipe and remain in said concrete where positioned when said isolation pipe is pulled from said trench after said concrete is poured and set.
Claim 3
Dependent Claim
18 words
The improvement to the isolation pipe of claim 1 wherein: said tubular drill guide member is of plastic.
Claim 4
Dependent Claim
42 words
The improvement to the isolation pipe of claim 1 wherein: said tubular drill guide member is provided with a plurality of flared portions spaced along its length to assist in maintaining said member in said concrete when said isolation pipe is pulled.
Claim 5
Dependent Claim
42 words
The improvement to the isolation pipe of claim 1 wherein: said tubular drill guide member is provided with a plurality of annular rings spaced along its length to assist in maintaining said member in said concrete when said isolation pipe is pulled.
Claim 6
Dependent Claim
27 words
The improvement to the isolation pipe of claim 1 wherein: said tubular drill guide member is releasably attached to said isolation pipe with a weak adhesive bond.
Claim 7
Dependent Claim
26 words
The improvement to the isolation pipe of claim 1 wherein: said tubular drill guide member is releasably attached to said isolation pipe with a breakable coupling.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |