Patent US3552195A successfully refreshed from Google Patents.
US3552195A
Expired / Lapsed
US
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Vane shear device
Assignee: Lockheed Martin Corp
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Filing: 1968-12-13
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Granted: 1971-01-05
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Expires: 1988-12-13
Abstract
Abstract A DEVICE CAPABLE OF BEING REMOTELY CONTROLLED TO MEASURE THE SHEAR STRENGTH OF SEDIMENT IN AN AQUATIC ENVIRONMENT IS DISCLOSED. A CONSTANT TORQUE IS INDUCED BY A MOTOR THROUGH A KINETIC ENERGY DEVICE, SUCH AS SPRING VANES, INTO A PADDLE ON THE END OF A OIL PRESSURIZED SHAFT. WHEN THE BOTTOM SEDIMENT RESISTS THE TORQUE THE POTENTIOMETER MONITORS THE RELATIVE ROTATION BETWEEN THE MOTOR ROTATION AND THE SHAFT PADDLE. THE TORQUE APPLICATION RATE, THE YIELD POINT, THE STRAIN RATE, AND THE ULTIMATE SHEAR OF THE SEDIMENT CAN BE RECORDED.
Inventors
- 👤 Thomas J Koprowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:07
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/24; G01N2203/00; G01N2203/02; G01N2203/022; G01N2203/0244; G01N33/00; G01N33/24
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |