US3139729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for constructing subterranean concrete walls
Assignee: MESSRS I C O S IMPRESA COSTRUZ
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Filing: 1960-01-08
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Granted: 1964-07-07
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Expires: 1980-01-08
Abstract
No abstract record available.
Inventors
- 👤 Miotti Giosue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:40
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/18; E02D17/00; E02D17/13; E04; E04B; E04B1/00; E04B1/0007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
APPARATUS FOR EXCAVATING SOIL FROM BETWEEN VERTICAL CYLINDRICAL CONCRETE ELEMENTS PREVIOUSLY CAST IN SUBSOIL WHEN CONSTRUCTING IMPERMEABLE SUBTERRANEAN CONCRETE PARTITION WALLS COMPRISING AN EXCAVATING TOOL HAVING A CENTRAL CHISEL, LATERAL HALF-MOON-SHAPED BLADES THE CONVEX SIDE OF WHICH FACES THE CHISEL AND WHICH HAVE UPPER AND LOWER CUTTING EDGES ARRANGED IN SUCH A WAY AS TO WIDEN THE EXCAVATION PRODUCED BY THE CENTRAL CHISEL AND AT THE SAME TIME TO SCRAPE THE TWO CYLINDRICAL CONCRETE ELEMENTS BORDERING ON THE EXCAVATION, AND MEANS FOR FEEDING A THIXOTROPIC SUBSTANCE INTO THE EXCAVATION MADE BY SAID EXCAVATING TOOL.
Claim 2
Dependent Claim
94 words
APPARATUS FOR EXCAVATING SOIL FROM BETWEEN VERTICAL CYLINDRICAL CONCRETE ELEMENTS PREVIOUSLY CAST IN SUBSOIL WHEN CONSTRUCTING IMPERMEABLE SUBTERRANEAN CONCRETE PARTITION WALLS COMPRISING AN EXCAVATING TOOL HAVING A CENTRAL CHISEL, LATERAL HALF-MOON-SHAPED BLADES THE CONVEX SIDE OF WHICH FACES THE CHISEL AND WHICH HAVE UPPER AND LOWER CUTTING EDGES ARRANGED IN SUCH A WAY AS TO WIDEN THE EXCAVATION PRODUCED BY THE CENTRAL CHISEL AND AT THE SAME TIME TO SCRAPE THE TWO CYLINDRICAL CONCRETE ELEMENTS BORDERING ON THE EXCAVATION, AND MEANS FOR FEEDING A THIXOTROPIC SUBSTANCE INTO THE EXCAVATION MADE BY SAID EXCAVATING TOOL.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |