US3133435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air dead weight tester
Assignee: Consolidated Electrodynamics Corp
•
Filing: 1956-05-28
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Granted: 1964-05-19
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard B Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:05
CPC Classifications
G; G01; G01L; G01L27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
AN AIR DEAD WEIGHT TESTER COMPRISING A BASE, A CYLINDER AFFIXED TO THE BASE AND HAVING FIRST AND SECOND BORES OF RESPECTIVELY RELATIVELY LARGE AND RELATIVELY SMALL DIAMETER, A CYLINDRICAL PISTON SLIDABLE IN THE SECOND BORE AND EXTENDING OUTWARDLY AND INWARDLY THEREFROM, THE PISTON BEING ROTATABLE IN THE BORE AND EXTENDING INTO THE FIRST BORE A DISTANCE IN EXCESS OF THE PISTON DISPLACEMENT DURING OPERATION OF THE TESTER, A FIRST ANNULAR RING CONNECTED TO AND EXTENDING HORIZONTALLY FROM THE PISTON AND FORMING A FIRST TABLE, A FIRST CYLINDRICAL SKIRT DEPENDING FROM THE PERIPHERY OF THE FIRST RING, A SECOND ANNULAR RING CONNECTED TO AND EXTENDING FROM THE FIRST SKIRT BENEATH THE FIRST TABLE AND FORMING A SECOND TABLE, A SEC-
Claim 2
Dependent Claim
120 words
AN AIR DEAD WEIGHT TESTER COMPRISING A BASE, A CYLINDER AFFIXED TO THE BASE AND HAVING FIRST AND SECOND BORES OF RESPECTIVELY RELATIVELY LARGE AND RELATIVELY SMALL DIAMETER, A CYLINDRICAL PISTON SLIDABLE IN THE SECOND BORE AND EXTENDING OUTWARDLY AND INWARDLY THEREFROM, THE PISTON BEING ROTATABLE IN THE BORE AND EXTENDING INTO THE FIRST BORE A DISTANCE IN EXCESS OF THE PISTON DISPLACEMENT DURING OPERATION OF THE TESTER, A FIRST ANNULAR RING CONNECTED TO AND EXTENDING HORIZONTALLY FROM THE PISTON AND FORMING A FIRST TABLE, A FIRST CYLINDRICAL SKIRT DEPENDING FROM THE PERIPHERY OF THE FIRST RING, A SECOND ANNULAR RING CONNECTED TO AND EXTENDING FROM THE FIRST SKIRT BENEATH THE FIRST TABLE AND FORMING A SECOND TABLE, A SEC-
References Cited (Backward Citations)
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US1217735A
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US1935508A
Cited
US2719431A
Cited
GB713657A
Cited
US2725741A
Cited
US2766612A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |