US3225816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for gas fired boilers
Assignee: Individual
•
Filing: 1962-08-10
•
Granted: 1965-12-28
•
Expires: 1982-08-10
Abstract
No abstract record available.
Inventors
- 👤 George H Familo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:16
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A SAFETY DEVICE FOR SIGNALLING A LEAK PAST AN AUTOMATICALLY OPERATED SUPPLY VALVE IN A LINE FOR SUPPLYING GAS AT A NORMAL PRESSURE, COMPRISING: A PRESSURE SENSITIVE VALVE IN THE SUPPLY LINE DOWNSTREAM FROM THE SUPPLY VALVE, SAID PRESSURE SENSITIVE VALVE HAVING A GATE THAT OPENS UNDER NORMAL GAS PRESSURE IN THE LINE AND IS BIASED TOWARD CLOSED POSITION AT LESS THAN NORMAL GAS PRESSURE, A BLEED LINE CONNECTED IN THE SUPPLY LINE BETWEEN SAID SUPPLY VALVE AND SAID BIASED GATE, AUTOMATICALLY OPERATED VALVE MEANS IN SAID BLEED LINE, MEANS FOR CLOSING SAID LAST-NAMED VALVE WHEN THE SUPPLY VALVE IS OPEN AND OPENING AND LAST-NAMED VALVE WHEN THE SUPPLY VALVE IS CLOSED, AND MEANS AT THE END OF THE BLEED-LINE FOR SENSING THE PRESENCE OF GAS ESCAPING THEREFROM WHEREBY A LEAK IN THE SUPPLY VALVE CAN BE DETECTED.
Claim 2
Dependent Claim
138 words
A SAFETY DEVICE FOR SIGNALLING A LEAK PAST AN AUTOMATICALLY OPERATED SUPPLY VALVE IN A LINE FOR SUPPLYING GAS AT A NORMAL PRESSURE, COMPRISING: A PRESSURE SENSITIVE VALVE IN THE SUPPLY LINE DOWNSTREAM FROM THE SUPPLY VALVE, SAID PRESSURE SENSITIVE VALVE HAVING A GATE THAT OPENS UNDER NORMAL GAS PRESSURE IN THE LINE AND IS BIASED TOWARD CLOSED POSITION AT LESS THAN NORMAL GAS PRESSURE, A BLEED LINE CONNECTED IN THE SUPPLY LINE BETWEEN SAID SUPPLY VALVE AND SAID BIASED GATE, AUTOMATICALLY OPERATED VALVE MEANS IN SAID BLEED LINE, MEANS FOR CLOSING SAID LAST-NAMED VALVE WHEN THE SUPPLY VALVE IS OPEN AND OPENING AND LAST-NAMED VALVE WHEN THE SUPPLY VALVE IS CLOSED, AND MEANS AT THE END OF THE BLEED-LINE FOR SENSING THE PRESENCE OF GAS ESCAPING THEREFROM WHEREBY A LEAK IN THE SUPPLY VALVE CAN BE DETECTED.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |