Patent US3219095A successfully refreshed from Google Patents.
US3219095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsed oil feeding system for industrial furnaces
Assignee: Hoganasmetoder AB
•
Filing: 1962-06-21
•
Granted: 1965-11-23
•
Expires: 1982-06-21
Abstract
No abstract record available.
Inventors
- 👤 Nilsson Uno Ingvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:40
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/24; F23D11/26; F23K; F23K5/00; F23K5/02; F23K5/06; F23K2900/00; F23K2900/05003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A FUEL BURNING SYSTEM FOR HEATING INDUSTRIAL FURNACES WITH LIQUID FUEL COMPRISING A PLURALITY OF BURNER UNITS, EACH UNIT COMPRISING A BURNER HAVING A NEEDLE VALVE LOCATED IN THE FUEL SUPPLY DUCT THEREOF, SAID NEEDLE VALVE BEING OF RELATIVELY SMALL MASS AND HAVING A SHORT PATH OF MOVEMENT, A SOLENOID AND A SPRING POSITIONED RESPECTIVELY TO OPEN AND CLOSE SAID NEEDLE VALVE AND A PLURALITY OF REMOTE MULTIVIBRATORS EACH HAVING ITS OUTPUT DIRECTLY CONNECTED TO THE COIL OF ONE OF SAID SOLENOIDS, EACH MULTIVIBRATOR COMPRISING ASSOCIATED CONTROL MEANS FOR VARYING AT LEAST THE RECURRENCE FREQUENCY OF THE OUTPUT PULSES THEREOF TO CONTROL THE OPERATION OF THE BURNER, SAID MULTIVIBRATORS AND THEIR ASSOCIATED CONTROL MEANS BEING MOUNTED AS A PORTABLE UNIT.
Claim 2
Dependent Claim
120 words
A FUEL BURNING SYSTEM FOR HEATING INDUSTRIAL FURNACES WITH LIQUID FUEL COMPRISING A PLURALITY OF BURNER UNITS, EACH UNIT COMPRISING A BURNER HAVING A NEEDLE VALVE LOCATED IN THE FUEL SUPPLY DUCT THEREOF, SAID NEEDLE VALVE BEING OF RELATIVELY SMALL MASS AND HAVING A SHORT PATH OF MOVEMENT, A SOLENOID AND A SPRING POSITIONED RESPECTIVELY TO OPEN AND CLOSE SAID NEEDLE VALVE AND A PLURALITY OF REMOTE MULTIVIBRATORS EACH HAVING ITS OUTPUT DIRECTLY CONNECTED TO THE COIL OF ONE OF SAID SOLENOIDS, EACH MULTIVIBRATOR COMPRISING ASSOCIATED CONTROL MEANS FOR VARYING AT LEAST THE RECURRENCE FREQUENCY OF THE OUTPUT PULSES THEREOF TO CONTROL THE OPERATION OF THE BURNER, SAID MULTIVIBRATORS AND THEIR ASSOCIATED CONTROL MEANS BEING MOUNTED AS A PORTABLE UNIT.
References Cited (Backward Citations)
US2577853A
Cited
US2646931A
Cited
US2582331A
Cited
US2907382A
Cited
US2982530A
Cited
US2933051A
Cited
US2987293A
Cited
US3090423A
Cited
US3070024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |