US3128756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: Individual
•
Filing: 1961-06-27
•
Granted: 1964-04-14
•
Expires: 1981-06-27
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Galvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:46
CPC Classifications
F; F24; F24D; F24D5/00; F24D5/06; F24D5/08; F23; F23C; F23C7/00; F23C7/02; F23C7/06; F23M; F23M5/00; F23M5/08; F23M5/085; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A FUEL-FIRED HEATER MECHANISM COMPRISING AN ELONGATED, COMBUSTION CHAMBER DEFINED LATERALLY BY A THINWALLED HEAT TRANSFER SURFACE, A FUEL BURNER MEANS SITUATED AT ONE END OF SAID CHAMBER AND ARRANGED TO DELIVER A FUEL SPRAY IN A CONICAL PATTERN SYMMETRICALLY OF THE LONGITUDINAL AXIS OF SAID CHAMBER, AND PREHEATER MEANS SITUATED AT THE END OF AND AWAY FROM SAID COMBUSTION CHAMBER OPPOSITE FROM SAID BURNER MEANS FOR DELIVERING PREHEATED COMBUSTION AIR TO THE FLAME IN SAID CHAMBER, SUCH COMBUSTION AIR PREHEATER MEANS HAVING SPACED APART CONCENTRIC SHELLS DEFINING BETWEEN SHELLS AN ANNULAR PATTERN OF FLOW PATHS FOR THE INCOMING COMBUSTION AIR AND ALSO DEFINING BETWEEN SHELLS AN ANNULAR PATTERN OF FLOW PATHS FOR THE PRODUCTS OF COMBUSTION DISCHARGED FROM SAID COMBUSTION CHAMBER, AND FURTHER INCLUDING MEANS DISCHARGING THE PREHEATED AIR AS AN ENVELOPE ALONG THE INSIDE OF
Claim 2
Dependent Claim
137 words
A FUEL-FIRED HEATER MECHANISM COMPRISING AN ELONGATED, COMBUSTION CHAMBER DEFINED LATERALLY BY A THINWALLED HEAT TRANSFER SURFACE, A FUEL BURNER MEANS SITUATED AT ONE END OF SAID CHAMBER AND ARRANGED TO DELIVER A FUEL SPRAY IN A CONICAL PATTERN SYMMETRICALLY OF THE LONGITUDINAL AXIS OF SAID CHAMBER, AND PREHEATER MEANS SITUATED AT THE END OF AND AWAY FROM SAID COMBUSTION CHAMBER OPPOSITE FROM SAID BURNER MEANS FOR DELIVERING PREHEATED COMBUSTION AIR TO THE FLAME IN SAID CHAMBER, SUCH COMBUSTION AIR PREHEATER MEANS HAVING SPACED APART CONCENTRIC SHELLS DEFINING BETWEEN SHELLS AN ANNULAR PATTERN OF FLOW PATHS FOR THE INCOMING COMBUSTION AIR AND ALSO DEFINING BETWEEN SHELLS AN ANNULAR PATTERN OF FLOW PATHS FOR THE PRODUCTS OF COMBUSTION DISCHARGED FROM SAID COMBUSTION CHAMBER, AND FURTHER INCLUDING MEANS DISCHARGING THE PREHEATED AIR AS AN ENVELOPE ALONG THE INSIDE OF
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |