US3820385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chamber for testing soils with triaxial stresses
Assignee: INST DE INGENIERIA MX
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Filing: 1973-01-16
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Granted: 1974-06-28
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Expires: 1993-01-16
Abstract
Abstract A novel chamber for testing soils with triaxial stresses is disclosed, the chamber comprising a cylinder of Lucite, having a metal base and cap, into which cylinder is placed a sample of soil or material to be subjected to a confining pressure by the application of an axial load that is transmitted to the sample by means of a system of peripheral wires which apply the load downwardly, and a central wire which, like the other wires, passes to the outside of the chamber and transmits the deformations of the sample subjected to pressure to a micrometer supported on a plate which is connected to the upper wire.
Inventors
- 👤 R Cordoba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:12
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/24; G01N3/00; G01N3/08; G01N2203/00; G01N2203/02; G01N2203/025; G01N2203/0256
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
268 words
In a triaxial chamber for testing soil samples and the like disposed therein and having the first means subjecting the sample to an axially directed force and second means subjecting the sample to a force applied in a direction substantially normal thereto under the action of a pressurized fluid surrounding the sample within the chamber, which normally directed force is maintained constant during a sample testing procedure, the improvement wherein said first means comprises: force-application means disposed within said chamber and operatively associated with the sample contained therein; at least three wires one end of each of which is attached to said force-application means, said wires being disposed in said chamber in a direction substantially axially of the sample contained therein; at least one other wire attached at one end thereof to said force-application means and being disposed in said chamber in a direction opposite to that taken by said three wires and substantially axially of the sample contained in said chamber; measuring means operatively connected to the other end of said one other wire whereby when a load is applied to the other ends of each of said three wires to provide said axially directed force to the sample, said one other wire and said three wires are placed in tension and the force of said load is transmitted to said force-application means through said three wires to cause compression of said sample, a resulting displacement of said force-application means when said compression produces deformation of said sample causing consequent movement of said one other wire, which movement is measured by said measuring means operatively connected thereto.
Claim 2
Dependent Claim
268 words
In a triaxial chamber for testing soil samples and the like disposed therein and having the first means subjecting the sample to an axially directed force and second means subjecting the sample to a force applied in a direction substantially normal thereto under the action of a pressurized fluid surrounding the sample within the chamber, which normally directed force is maintained constant during a sample testing procedure, the improvement wherein said first means comprises: force-application means disposed within said chamber and operatively associated with the sample contained therein; at least three wires one end of each of which is attached to said force-application means, said wires being disposed in said chamber in a direction substantially axially of the sample contained therein; at least one other wire attached at one end thereof to said force-application means and being disposed in said chamber in a direction opposite to that taken by said three wires and substantially axially of the sample contained in said chamber; measuring means operatively connected to the other end of said one other wire whereby when a load is applied to the other ends of each of said three wires to provide said axially directed force to the sample, said one other wire and said three wires are placed in tension and the force of said load is transmitted to said force-application means through said three wires to cause compression of said sample, a resulting displacement of said force-application means when said compression produces deformation of said sample causing consequent movement of said one other wire, which movement is measured by said measuring means operatively connected thereto.
Claim 3
Dependent Claim
42 words
A triaxial chamber as defined in claim 1 wherein said force-application means is a plate disposed on said sample to be tested, said three wires being attached thereto and peripherally thereof while said one other wire is attached centrally of said plate.
Claim 4
Dependent Claim
30 words
A triaxial chamber as defined in claim 1 wherein said three wires and said one other wire extend exteriorly of said chamber through teflon-molybdenum bushing disposed in the walls thereof.
Claim 5
Dependent Claim
55 words
A triaxial chamber as defined in claim 1 wherein said measuring means comprises a micrometer and a movable plate connected to said other end of said one other wire whereby when said force-application means is displaced said movable plate actuates said micrometer to provide a measurement of the deformation of the sample to be tested.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |