Patent US3177865A successfully refreshed from Google Patents.
US3177865A
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Combustion systems for heating fluids
Assignee: Hazen Engineering Co
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Filing: 1963-11-18
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Granted: 1965-04-13
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Expires: 1983-11-18
Abstract
No abstract record available.
Inventors
- 👤 Robert L Jones
- 👤 Howard H Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:16
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/18; F24H9/1809; F24H9/1832; F24H9/1836; F23; F23K; F23K5/00; F23K5/02; F23K5/14; F23K5/20; F24H1/00; F24H1/22; F24H1/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A COMBUSTION SYSTEM FOR HEATING FLUIDS A PRESSURE CHAMBER FOR MAINTAINING COMBUSTION AIR UNDER PRESSURE, AN ASSEMBLY COMPRISING A COMBUSTION AIR TUBE DISPOSED IN SAID CHAMBER HAVING PERFORATIONS IN THE WALL THELREOF TO DIRECT JETS OF AIR FROM SAID PRESSURE CHAMBER TO THE INTERIOR OF SAID TUBE, MEANS DELIVERING TO SAID TUBE AT ONE END A SUPPLY OF PREMIXED FUEL AND AIR THAT BURNS WHEN INSPIRATED INTO THE JETS OF AIR ENTERING THE TUBE, THE OTHER END OF SAID TUBE HAVING A WASTE OUTLET, A FIRST FLUID FLOW TUBE CLOSED AT ONE END DISPOSED INSIDE OF SAID COMBUSTION AIR TUBE TO PROVIDE AN ANNULAR FLOW PASSAGE, FOR THE FLOW OF THE PREMIXED FUEL AND AIR AND PRODUCTS OF
Claim 2
Dependent Claim
119 words
IN A COMBUSTION SYSTEM FOR HEATING FLUIDS A PRESSURE CHAMBER FOR MAINTAINING COMBUSTION AIR UNDER PRESSURE, AN ASSEMBLY COMPRISING A COMBUSTION AIR TUBE DISPOSED IN SAID CHAMBER HAVING PERFORATIONS IN THE WALL THELREOF TO DIRECT JETS OF AIR FROM SAID PRESSURE CHAMBER TO THE INTERIOR OF SAID TUBE, MEANS DELIVERING TO SAID TUBE AT ONE END A SUPPLY OF PREMIXED FUEL AND AIR THAT BURNS WHEN INSPIRATED INTO THE JETS OF AIR ENTERING THE TUBE, THE OTHER END OF SAID TUBE HAVING A WASTE OUTLET, A FIRST FLUID FLOW TUBE CLOSED AT ONE END DISPOSED INSIDE OF SAID COMBUSTION AIR TUBE TO PROVIDE AN ANNULAR FLOW PASSAGE, FOR THE FLOW OF THE PREMIXED FUEL AND AIR AND PRODUCTS 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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |