US3269450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas furnace control system
Assignee: Motors Liquidation Co
•
Filing: 1963-12-12
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Granted: 1966-08-30
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Expires: 1983-12-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Licata
- 👤 Lawrence J Mclaughlin
- 👤 Harold J Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:48
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02; F23N1/027; F23N5/00; F23N5/20; F23N2227/00; F23N2227/04; F23N2227/36; F23N2229/00; F23N2233/00; F23N2233/06; F23N2235/00; F23N2235/12; F23N2235/14; F23N2235/18; F23N2235/20; F23N2235/22; F23N2235/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A CONTROL SYSTEM IN A PRESSURIZED GASEOUS FUEL BURNER WHEREIN COMBUSTION AIR IS SUPPLIED UNDER PRESSURE AND MIXED WITH GASEOUS FUEL TO FORM A COMBUSTIBLE MIXING INCLUDING A BLOWER FOR SUPPLYING COMBUSTION AIR UNDER PRESSURE, A CONDUIT CONNECTING SAID BLOWER AND SAID BURNER, A FUEL SHUT-OFF VALVE, PRESSURE REGULATING MEANS FOR THE GASEOUS FUEL HAVING A CONNECTION WITH SAID CONDUIT AND INCLUDING A THROTTLING VALVE AND MEANS RESPONSIVE TO PRESSURE OF THE GASEOUS FUEL AND COMBUSTION AIR FOR CONTROLLING SAID TROTTLING VALVE TO MAINTAIN A SUBSTANTIALLY CONSTANT FUEL-GAS RATIO WITH VARIATIONS IN THE PRESSURE OF COMBUSTION AIR, SAID TROTTLING VALVE COMPRISING A VALVE DISC AND A COOPERABLE SEAT, SAID VALVE DISC BEING ATTACHED TO A VALVE STEM, A SAFETY MAGNET ATTACHED TO SAID VALVE STEM AND MAGNETIZABLE MEANS COACTING WITH SAID SAFETY MAGNET TO MOVE SAID VALVE DISC INTO ENGAGEMENT
Claim 2
Dependent Claim
140 words
A CONTROL SYSTEM IN A PRESSURIZED GASEOUS FUEL BURNER WHEREIN COMBUSTION AIR IS SUPPLIED UNDER PRESSURE AND MIXED WITH GASEOUS FUEL TO FORM A COMBUSTIBLE MIXING INCLUDING A BLOWER FOR SUPPLYING COMBUSTION AIR UNDER PRESSURE, A CONDUIT CONNECTING SAID BLOWER AND SAID BURNER, A FUEL SHUT-OFF VALVE, PRESSURE REGULATING MEANS FOR THE GASEOUS FUEL HAVING A CONNECTION WITH SAID CONDUIT AND INCLUDING A THROTTLING VALVE AND MEANS RESPONSIVE TO PRESSURE OF THE GASEOUS FUEL AND COMBUSTION AIR FOR CONTROLLING SAID TROTTLING VALVE TO MAINTAIN A SUBSTANTIALLY CONSTANT FUEL-GAS RATIO WITH VARIATIONS IN THE PRESSURE OF COMBUSTION AIR, SAID TROTTLING VALVE COMPRISING A VALVE DISC AND A COOPERABLE SEAT, SAID VALVE DISC BEING ATTACHED TO A VALVE STEM, A SAFETY MAGNET ATTACHED TO SAID VALVE STEM AND MAGNETIZABLE MEANS COACTING WITH SAID SAFETY MAGNET TO MOVE SAID VALVE DISC INTO ENGAGEMENT
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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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |