Patent US3234795A successfully refreshed from Google Patents.
US3234795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure pickup
Assignee: Individual
•
Filing: 1962-11-23
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Granted: 1966-02-15
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Expires: 1982-11-23
Abstract
No abstract record available.
Inventors
- 👤 Yao T Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:14
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/08; G01L23/18; G01L9/00; G01L9/0041; G01L9/0051; G01L9/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PRESSURE GAGE COMPRISING, A CYLINDRICAL FRAME, A THIN AND FLEXIBLE DIAPHRAGM EXTENDING ACROSS AND CLOSING ONE END OF THE FRAME, SAID DIAPHRAGM HAVING A FLAT CENTRAL PORTION AND A DISHED ANNULAR PORTION SURROUNDING THE CENTRAL PORTION, A PAIR OF COEXTENSIVE CONCENTRIC STRAIN TUBES MADE OF THE SAME MATERIAL DISPOSED COAXIALLY IN THE FRAME AND CONNECTED TOGETHER AT THEIR UPPER ENDS, MEANS SECURING THE LOWER END OF THE INNER STRAIN TUBE TO THE FLAT CENTRAL PORTION OF THE DIAPHARGM, MEANS CONNECTING THE LOWER END OF THE OUTER STRAIN TUBE TO THE FRAME, ELECTRICAL WINDINGS EXTENDING LONGITUDINALLY ON AND BONDED TO EACH OF THE TUBES, AND MEANS FOR DETECTING VARIATIONS IN THE RESISTANCE OF THE WINDINGS, SAID TUBES AFFORDING SUBSTANTIALLY THE ENTIRE ELASTIC RESTRAINT AGAINST PRESSURE EXERTED ON THE THIN DIAPHRAGM.
Claim 2
Dependent Claim
130 words
A PRESSURE GAGE COMPRISING, A CYLINDRICAL FRAME, A THIN AND FLEXIBLE DIAPHRAGM EXTENDING ACROSS AND CLOSING ONE END OF THE FRAME, SAID DIAPHRAGM HAVING A FLAT CENTRAL PORTION AND A DISHED ANNULAR PORTION SURROUNDING THE CENTRAL PORTION, A PAIR OF COEXTENSIVE CONCENTRIC STRAIN TUBES MADE OF THE SAME MATERIAL DISPOSED COAXIALLY IN THE FRAME AND CONNECTED TOGETHER AT THEIR UPPER ENDS, MEANS SECURING THE LOWER END OF THE INNER STRAIN TUBE TO THE FLAT CENTRAL PORTION OF THE DIAPHARGM, MEANS CONNECTING THE LOWER END OF THE OUTER STRAIN TUBE TO THE FRAME, ELECTRICAL WINDINGS EXTENDING LONGITUDINALLY ON AND BONDED TO EACH OF THE TUBES, AND MEANS FOR DETECTING VARIATIONS IN THE RESISTANCE OF THE WINDINGS, SAID TUBES AFFORDING SUBSTANTIALLY THE ENTIRE ELASTIC RESTRAINT AGAINST PRESSURE EXERTED ON THE THIN DIAPHRAGM.
References Cited (Backward Citations)
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Cited
US2327935A
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US2637210A
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US2814946A
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US2989868A
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US2942219A
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |