US3326046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-transducer pressure measuring device
Assignee: Individual
•
Filing: 1964-08-28
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Granted: 1967-06-20
•
Expires: 1984-08-28
Abstract
No abstract record available.
Inventors
- 👤 Donald B Risher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:02
CPC Classifications
G; G01; G01L; G01L19/00; G01M; G01M9/00; G01M9/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A SYSTEM FOR CALIBRATING A LARGE NUMBER OF PRESSURE TRANSDUCERS SIMULTANEOUSLY AND FOR MEASURING A PLURALITY OF PRESSURES WITHIN A WIND TUNNEL SIMULTANEOUSLY COMPRISING, A PLURALITY OF PRESSURE TRANSDUCERS, EACH OF SAID TRANSDUCERS HAVING AN ELECTRICAL OUTPUT, A SOURCE OF VACUUM, A SOURCE OF REFERENCE PRESSURE, A PLURALITY OF WIND TUNNEL PRESSURE MEASURING STATIONS, A VACUUM CHAMBER, A FIRST VALVE MEANS FOR ALTERNATELY CONNECTING EACH OF SAID PRESURE TRANSDUCERS TO SAID VACUUM CHAMBER AND TO EACH OF SAID PLURALITY OF RESPECTIVE PRESSURE MEASURING STATIONS, SECOND VALVE MEANS FOR CONNECTING SAID VACUUM CHAMBER TO SAID SOURCE OF VACUUM AND TO SAID SOURCE OF REFERENCE PRESSURE SELECTIVELY WHEREBY SAID PRESSURE TRANSDUCERS MAY BE CALIBRATED SIMULTANEOUSLY AND A LARGE NUMBER OF PRESSURE MAY BE MEASURED SIMULTANEOUSLY.
References Cited (Backward Citations)
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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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |