Patent US3340734A successfully refreshed from Google Patents.
US3340734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas impervious diaphragms
Assignee: Textron Inc
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Filing: 1965-01-26
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Granted: 1967-09-12
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Expires: 1985-01-26
Abstract
No abstract record available.
Inventors
- 👤 Clair Theodore A St
- 👤 Ernest L Greenhill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:33
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/02; G01F3/20; G01F3/22; G01F3/225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A STROKE-THROUGH-CENTER DIAPHRGM FOR GAS METERS WHICH IS MOVABLE FROM FULL OUTSTROKE POSITION THROUGH MIDSTROKE POSITION TO FULL INSTROKE POSITION, SAID DIAPHRAGM COMPRISING A SUBSTANTIALLY RIGID CENTER PLATE, AN OUTER RETAINING FLANGE CONCENTRIC WITH AND SUBSTANTIALLY PARALLEL TO SAID CENTER PLATE, AND A FLEXIBLE IMPERVIOUS TROUGHSHAPED ANNULAR MEMBER CONNECTED TO AND EXTENDING BETWEEN SAID CENTER PLATE AND FLANGE, SAID ANNULAR MEMBER IN THE FULL OUTSTROKE POSITION OF SAID DIAPHRAGM HAVING A SUBSTANTIALLY SMOOTH OUTER PERIPHERAL SURFACE CONCENTRIC WITH THE AXIS OF SAID ANNULAR MEMBER AND HAVING AN INNER PERIPHERAL SURFACE SHAPED TO PROVIDE A PLURALITY OF SPACED RADIAL RIBS IN SAID INNER PERIPHERAL SURFACE DEFINING RADIAL CREASES THEREBETWEEN, SAID CREASES AND RIBS EXTENDING AT LEAST TO SAID OUTER PERIPHERAL SURFACE, SAID OUTER PERIPHERAL SURFACE DECREASING IN WIDTH AND SAID INNER PERIPHERAL SUR-
Claim 2
Dependent Claim
132 words
A STROKE-THROUGH-CENTER DIAPHRGM FOR GAS METERS WHICH IS MOVABLE FROM FULL OUTSTROKE POSITION THROUGH MIDSTROKE POSITION TO FULL INSTROKE POSITION, SAID DIAPHRAGM COMPRISING A SUBSTANTIALLY RIGID CENTER PLATE, AN OUTER RETAINING FLANGE CONCENTRIC WITH AND SUBSTANTIALLY PARALLEL TO SAID CENTER PLATE, AND A FLEXIBLE IMPERVIOUS TROUGHSHAPED ANNULAR MEMBER CONNECTED TO AND EXTENDING BETWEEN SAID CENTER PLATE AND FLANGE, SAID ANNULAR MEMBER IN THE FULL OUTSTROKE POSITION OF SAID DIAPHRAGM HAVING A SUBSTANTIALLY SMOOTH OUTER PERIPHERAL SURFACE CONCENTRIC WITH THE AXIS OF SAID ANNULAR MEMBER AND HAVING AN INNER PERIPHERAL SURFACE SHAPED TO PROVIDE A PLURALITY OF SPACED RADIAL RIBS IN SAID INNER PERIPHERAL SURFACE DEFINING RADIAL CREASES THEREBETWEEN, SAID CREASES AND RIBS EXTENDING AT LEAST TO SAID OUTER PERIPHERAL SURFACE, SAID OUTER PERIPHERAL SURFACE DECREASING IN WIDTH AND SAID INNER PERIPHERAL SUR-
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |