US3221798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping system for oil burners
Assignee: Individual
•
Filing: 1962-10-23
•
Granted: 1965-12-07
•
Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Kofink Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:01
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/109; F04B11/00; F04B11/0008; F04B11/0016; F04B11/0025; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B43/00; F04B43/02; F04B43/04; F23; F23K; F23K5/00; F23K5/02; F23K5/04; F23N; F23N1/00; F23N1/02; F23N1/022; F23N5/00; F23N5/02; F23N5/04; F23N5/045; F23N2227/00; F23N2227/10; F23N2233/00; F23N2233/06; F23N2233/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A CONTROL SYSTEM FOR AN OIL BURNER COMPRISING AN ELECTRICALLY OPERABLE VARIABLE SPEED BLOWER FOR DELIVERING AIR TO SAID BURNER, AND AN ELECTROMAGNETIC PUMP FOR DELIVERING FUEL TO SAID BURNER, AN ELECTRIC IMPULSE GENERATOR FOR SUPPLYING A PULSATING CURRENT TO SAID PUMP, SAID IMPULSE GENERATOR COMPRISING A TWO TRANSISTOR OSCILLATION CIRCUIT, A PAIR OF VARIABLE RESISTANCE MEANS RESPECTIVELY REGULATING THE SPEED OF SAID BLOWER AND THE FREQUENCY OF SAID PULSATING CURRENT, AND THERMOSTAT MEANS HAVING SWITCH CONTACTS EFFECTING ALTERNATE SWITCHING IN AND OUT OF SAID RESISTANCE MEANS TO EFFECT VARIATIONS OF SPEED OF SAID BLOWER AND VARIATIONS IN STROKE FREQUENCY OF SAID PUMP.
Claim 2
Dependent Claim
103 words
A CONTROL SYSTEM FOR AN OIL BURNER COMPRISING AN ELECTRICALLY OPERABLE VARIABLE SPEED BLOWER FOR DELIVERING AIR TO SAID BURNER, AND AN ELECTROMAGNETIC PUMP FOR DELIVERING FUEL TO SAID BURNER, AN ELECTRIC IMPULSE GENERATOR FOR SUPPLYING A PULSATING CURRENT TO SAID PUMP, SAID IMPULSE GENERATOR COMPRISING A TWO TRANSISTOR OSCILLATION CIRCUIT, A PAIR OF VARIABLE RESISTANCE MEANS RESPECTIVELY REGULATING THE SPEED OF SAID BLOWER AND THE FREQUENCY OF SAID PULSATING CURRENT, AND THERMOSTAT MEANS HAVING SWITCH CONTACTS EFFECTING ALTERNATE SWITCHING IN AND OUT OF SAID RESISTANCE MEANS TO EFFECT VARIATIONS OF SPEED OF SAID BLOWER AND VARIATIONS IN STROKE FREQUENCY OF SAID PUMP.
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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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |