US3595072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete testing means
Assignee: Individual
•
Filing: 1969-07-22
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Granted: 1971-07-27
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Expires: 1989-07-22
Abstract
Abstract The strength of concrete or equivalent materials is tested in situ after various degrees of cure by means of one or more test members buried in place in the green concrete slurry. The member has a shank with an enlarged head which can be stressed until the concrete fractures to leave a crater, thus giving a rupture modulus strength value and permitting inspection of the interior concrete structure. Destructive testing is not necessary if a predetermined strength value is to be tested and the concrete withstands the test. This provides a test of the actual conditions found in any structural site and under conditions which may otherwise vary with shape, cure conditions, etc.
Inventors
- 👤 Owen Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:10
CPC Classifications
G; G01; G01N; G01N3/00; G01N2203/00; G01N2203/0058; G01N2203/0092
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
In testing of concrete structures in which a test member, adapted for and calibrated with known dimensions specifically for measuring the strength of concrete from one surface, is embedded in the concrete, and a measurable force is applied to said test member, said test member comprising a shank with an enlarged head with the outer end of the shank flush with said surface of the concrete, said shank having means to enable said measurable force to be applied to said test member from the surface of the concrete, thereby attempting to move the enlarged head in the concrete.
Claim 2
Dependent Claim
98 words
In testing of concrete structures in which a test member, adapted for and calibrated with known dimensions specifically for measuring the strength of concrete from one surface, is embedded in the concrete, and a measurable force is applied to said test member, said test member comprising a shank with an enlarged head with the outer end of the shank flush with said surface of the concrete, said shank having means to enable said measurable force to be applied to said test member from the surface of the concrete, thereby attempting to move the enlarged head in the concrete.
Claim 3
Dependent Claim
22 words
A test member as defined in claim 1 wherein the shank is removably affixed to said head by means of screw threads.
Claim 4
Dependent Claim
30 words
A test member as defined in claim 1, wherein the test member means to enable said measurable force to be applied comprises an internally disposed threaded cavity in said shank.
Claim 5
Dependent Claim
16 words
A test member as defined in claim 3 including a removable plug in said threaded cavity.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |