US4281534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensor for measuring leakage
Assignee: NDE ENVIRONMENTAL Corp A CORP OF
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Filing: 1979-10-12
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Granted: 1981-08-04
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Expires: 1999-10-12
Abstract
Abstract A sensor for measuring leakage from a liquid containing tank comprises a main body portion suspended from a balance arm or other mass displacement detector and has a liquid holding portion in the main body. The cross-sectional area of the liquid holding portion is essentially equal to the cross-sectional area of the main body portion in contact with the liquid in the tank. This arrangement enables evaporation losses to be compensated.
Inventors
- 👤 William B. Hansel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:30
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/20; G01F23/0023; G01F25/00; G01F25/10; G01F25/14; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/32; G01M3/3236; G01M3/3245
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
93 words
A sensor device useful for measuring mass displacement in a leaking tank comprising a main body portion having suspension means for attachment to a balance arm or other means for mass displacement detection and a liquid holding portion in said sensor body to hold liquid above the level of liquid in said tank, the cross-sectional area of said liquid holding portion being essentially equal to the cross-sectional area of the body portion in contact with the liquid in the tank, whereby changes in said mass displacement measurement due to evaporative losses are compensated.
Claim 2
Dependent Claim
93 words
A sensor device useful for measuring mass displacement in a leaking tank comprising a main body portion having suspension means for attachment to a balance arm or other means for mass displacement detection and a liquid holding portion in said sensor body to hold liquid above the level of liquid in said tank, the cross-sectional area of said liquid holding portion being essentially equal to the cross-sectional area of the body portion in contact with the liquid in the tank, whereby changes in said mass displacement measurement due to evaporative losses are compensated.
Claim 3
Dependent Claim
57 words
A sensor device as in claim 1 having a board-like configuration and designed to be suspended in said tank in a horizontal position, said liquid holding means being a dished out portion in said board-like surface and said suspension means having a quick-release mechanism to enable removal of said sensor through a narrow opening of said tank.
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) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |