US3138028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety closure for pressure indicating gauge
Assignee: Robertshaw Controls Co
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Filing: 1961-10-25
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Granted: 1964-06-23
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Expires: 1981-10-25
Abstract
No abstract record available.
Inventors
- 👤 Charles H Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:47
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/06; G01L19/0627; G01L19/0654; G01L19/0672
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
IN AN INSTRUMENT CASE HAVING A SAFETY CLOSURE ADAPTED TO BLOW-OUT IN RESPONSE TO A PREDETERMINED PRESSURE, THE COMBINATION COMPRISING A CASE, AN OPENED WALL ON SAID CASE HAVING PERIPHERAL SURFACE MEANS DEFINING AN OPENING, A SAFETY CLOSURE ELEMENT BEING MADE OF DIFFERENT MATERIAL FROM SAID CASE AND HAVING AN OUTER EDGE TO ENGAGE SAID PERIPHERAL SURFACE MEANS AND CLOSE THE OPENING IN SAID WALL, FLEXIBLE LIP MEANS ON SAID CLOSURE ELEMENT ENGAGING SAID PERIPHERAL SURFACE MEANS TO RETAIN SAID CLOSURE ELEMENT IN SAID OPENED WALL, SAID FLEXIBLE LIP MEANS BEING DEFINED BY GROOVE MEANS IN ONE FACE OF SAID CLOSURE ELEMENT ADJACENT AND COEXTENSIVE WITH THE OUTER EDGE OF SAID CLOSURE ELEMENT TO COMPENSATE FOR DIMENSIONAL CHANGES BETWEEN SAID CASE AND SAID SAFETY CLOSURE ELEMENT.
References Cited (Backward Citations)
US1905301A
Cited
US2693896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |