US3884067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tensiometer
Assignee: Individual
•
Filing: 1972-06-19
•
Granted: 1975-05-20
•
Expires: 1992-06-19
Abstract
Abstract An improved soil moisture tensiometer comprising a tubular housing having a porous cup attached to the bottom thereof and a mercury barometer disposed within said housing, wherein the housing is adatped to be filled with water and closed and the barometer is adapted to indicate the moisture content of the soil surrounding said cup.
Inventors
- 👤 Yaacov Mottes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:19
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/24; G01N33/246
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
An improved soil moisture tensiometer comprising a tubular housing having a porous cup attached to the bottom thereof and a U-shaped narrow tube mercury barometer disposed within said housing, wherein the housing is provided with a removable closure for the upper end thereof and is adapted to be filled with water and closed by said closure and the barometer has a shorter leg open to the interior of said housing and a longer leg associated with a calibrated scale and sealed at its top, which leg is characterized by the existence of a vacuum between said sealed end and the mercury contained therein; said tensiometer further comprising means enabling said barometer and calibrated scale to be in moveable relationship to each other, whereby said barometer is adapted to indicate the moisture content of the soil surrounding said cup after said barometer and said scale have been adjusted relative to each other in accordance with the atmospheric conditions prevelant at the location at which the tensiometer reading is to be effected.
Claim 2
Dependent Claim
170 words
An improved soil moisture tensiometer comprising a tubular housing having a porous cup attached to the bottom thereof and a U-shaped narrow tube mercury barometer disposed within said housing, wherein the housing is provided with a removable closure for the upper end thereof and is adapted to be filled with water and closed by said closure and the barometer has a shorter leg open to the interior of said housing and a longer leg associated with a calibrated scale and sealed at its top, which leg is characterized by the existence of a vacuum between said sealed end and the mercury contained therein; said tensiometer further comprising means enabling said barometer and calibrated scale to be in moveable relationship to each other, whereby said barometer is adapted to indicate the moisture content of the soil surrounding said cup after said barometer and said scale have been adjusted relative to each other in accordance with the atmospheric conditions prevelant at the location at which the tensiometer reading is to be effected.
References Cited (Backward Citations)
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Cited
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US3043133A
Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |