Patent US3107656A successfully refreshed from Google Patents.
US3107656A
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US
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Boilers having a combustion chamber encircled with water tubes
Assignee: CHICAGO DOWNDRAFT FURNACE CO
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Filing: 1960-12-23
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Granted: 1963-10-22
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Expires: 1980-12-23
Abstract
No abstract record available.
Inventors
- 👤 Raymond F Mcneal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:39
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F24H1/406; F22; F22B; F22B21/00; F22B21/34; F22B21/346; F22B7/00; F22B7/12; F22B7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN COMBINATION IN A BOILER HAVING A WATER SPACE, A COMBUSTION CHAMBER POSITIONED BELOW SAID WATER SPACE, SAID CHAMBER COMPRISING A GENERALLY TUBULAR SPACE HAVING A PLURALITY OF LONGITUDINALLY SPACED WATER TUBES THEREIN, EACH TUBE ENCIRCLING THE CHAMBER IN A PLANE GENERALLY TRANSVERSE TO THE LONGITUDINAL AXIS THEREOF AND IN DIRECT CONTACT WITH COMBUSTION GASES PASSING THROUGH SAID CHAMBER, MEANS INTRODUCING FUEL AT ONE END OF SAID CHAMBER, MEANS POSITIONED BETWEEN SAID ENCIRCLING TUBES FOR PREVENTING THE LATERAL PASSAGE OF COMBUSTION GASES BETWEEN ADJACENT TUBES BUT LEAVING A SUBSTANTIAL PART OF THE OUTER PERIPHERY OF SAID TUBES UNCOVERED, MEANS CONNECTING SAID ENCIRCLING TUBES TO SAID WATER SPACE, AND MEANS TURNING SAID GASES BACKWARDLY UPON THEMSELVES AFTER PASSING THROUGH SAID CHAMBER FOR DIRECT CONTACT WITH SAID OUTER PERIPHERY OF SAID ENCIRCLING TUBES.
Claim 2
Dependent Claim
131 words
IN COMBINATION IN A BOILER HAVING A WATER SPACE, A COMBUSTION CHAMBER POSITIONED BELOW SAID WATER SPACE, SAID CHAMBER COMPRISING A GENERALLY TUBULAR SPACE HAVING A PLURALITY OF LONGITUDINALLY SPACED WATER TUBES THEREIN, EACH TUBE ENCIRCLING THE CHAMBER IN A PLANE GENERALLY TRANSVERSE TO THE LONGITUDINAL AXIS THEREOF AND IN DIRECT CONTACT WITH COMBUSTION GASES PASSING THROUGH SAID CHAMBER, MEANS INTRODUCING FUEL AT ONE END OF SAID CHAMBER, MEANS POSITIONED BETWEEN SAID ENCIRCLING TUBES FOR PREVENTING THE LATERAL PASSAGE OF COMBUSTION GASES BETWEEN ADJACENT TUBES BUT LEAVING A SUBSTANTIAL PART OF THE OUTER PERIPHERY OF SAID TUBES UNCOVERED, MEANS CONNECTING SAID ENCIRCLING TUBES TO SAID WATER SPACE, AND MEANS TURNING SAID GASES BACKWARDLY UPON THEMSELVES AFTER PASSING THROUGH SAID CHAMBER FOR DIRECT CONTACT WITH SAID OUTER PERIPHERY OF SAID ENCIRCLING TUBES.
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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |