US3262313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure chamber level gauge with bubble supply
Assignee: Schneider Electric Systems USA Inc
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Filing: 1964-11-09
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Granted: 1966-07-26
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Expires: 1984-11-09
Abstract
No abstract record available.
Inventors
- 👤 Hanna Archibald Leland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:17
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/165; G01F23/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A LIQUID LEVEL MEASUREMENT SYSTEM COMPRISING A TANK, AN AIR CHAMBER IN THE FORM OF AN INVERTED CUP FOR LOCATION WITHIN A LIQUID BODY IN SAID TANK, AT A SELECTED DEPTH THEREIN, PRESSURE TAKE-OFF MEANS CONNECTED INTO SAID AIR CHAMBER, A FLUID OUTLET PIPE FROM SAID TANK, MEANS FOR MOVING LIQUID FROM SAID TANK THROUGH SAID OUTLET PIPE, A FEEDBACK PIPE FROM SAID OUTLET PIPE BACK INTO SAID AIR CHAMBER, AND ASPIRATOR MEANS FROM ATMOSPHERE INTO SAID FEEDBACK PIPE, WHEREBY A FLOW OF LIQUID IS PRODUCED FROM SAID TANK THROUGH SAID OUTLET AND BACK TO SAID TANK THROUGH SAID FEEDBACK PIPE DURING SAID OUTLET FLOW, AS AN AIR BUBBLE ENTRAINMENT SYSTEM FROM ATMOSPHERE TO SAID AIR CHAMBER.
Claim 2
Dependent Claim
117 words
A LIQUID LEVEL MEASUREMENT SYSTEM COMPRISING A TANK, AN AIR CHAMBER IN THE FORM OF AN INVERTED CUP FOR LOCATION WITHIN A LIQUID BODY IN SAID TANK, AT A SELECTED DEPTH THEREIN, PRESSURE TAKE-OFF MEANS CONNECTED INTO SAID AIR CHAMBER, A FLUID OUTLET PIPE FROM SAID TANK, MEANS FOR MOVING LIQUID FROM SAID TANK THROUGH SAID OUTLET PIPE, A FEEDBACK PIPE FROM SAID OUTLET PIPE BACK INTO SAID AIR CHAMBER, AND ASPIRATOR MEANS FROM ATMOSPHERE INTO SAID FEEDBACK PIPE, WHEREBY A FLOW OF LIQUID IS PRODUCED FROM SAID TANK THROUGH SAID OUTLET AND BACK TO SAID TANK THROUGH SAID FEEDBACK PIPE DURING SAID OUTLET FLOW, AS AN AIR BUBBLE ENTRAINMENT SYSTEM FROM ATMOSPHERE TO SAID AIR CHAMBER.
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |