Patent US3600951A successfully refreshed from Google Patents.
Patent US3604400A successfully refreshed from Google Patents.
US3604400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam generator and other heated heat transmitters
Assignee: Sulzer AG
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Filing: 1969-11-12
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Granted: 1971-09-14
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Expires: 1989-11-12
Abstract
Abstract The steam generator is provided with a whirling combustion chamber capable of generating at least 107 kcal./cubic meter hour ata. The whirling combustion chamber is connected directly to a combustion gas flue containing heating tubes or surfaces therein. The walls of the combustion chamber do not require cooling means as such are lined with ceramic oxide material.
Inventors
- 👤 Harendra Nath Sharan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:00
CPC Classifications
F; F23; F23C; F23C6/00; F23C6/02; F23C3/00; F23C3/006
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
In combination with a steam generator having a combustion gas flue and a convective heating surface therein; at least one whirling combustion chamber of cylindrical shape with a circular cross section for the combustion of an approximately stochiometric mixture of fuel and air to produce an output of at least 107 kcal./cubic meter per hour at atmospheric pressure, said combustion chamber being connected directly to said flue for delivery of combustion gas directly from said combustion chamber inTo said flue to flow directly over said convective heating surface.
Claim 2
Dependent Claim
88 words
In combination with a steam generator having a combustion gas flue and a convective heating surface therein; at least one whirling combustion chamber of cylindrical shape with a circular cross section for the combustion of an approximately stochiometric mixture of fuel and air to produce an output of at least 107 kcal./cubic meter per hour at atmospheric pressure, said combustion chamber being connected directly to said flue for delivery of combustion gas directly from said combustion chamber inTo said flue to flow directly over said convective heating surface.
Claim 3
Dependent Claim
24 words
The combination as set forth in claim 1 wherein said combustion chamber has an internal wall and a ceramic oxide lining on said wall.
Claim 4
Dependent Claim
16 words
The combination as set forth in claim 1 wherein said combustion chamber has an uncooled wall.
Claim 5
Dependent Claim
33 words
The combination as set forth in claim 1 wherein said combustion chamber has a wall exposed to the mixture of fuel and air, and insulation about said wall to diminish heat loss therefrom.
Claim 6
Dependent Claim
30 words
The combination as set forth in claim 1 which includes an even number of said combustion chambers arranged in pairs coaxially opposite each other at one end of said flue.
Claim 7
Dependent Claim
28 words
The combination as set forth in claim 1 wherein said combustion chamber includes a flame tube of a length to inner diameter ratio of from 0.5 to 2.0.
Claim 8
Dependent Claim
18 words
The combination as set forth in claim 1 wherein said combustion chamber has a ceramic oxide lining therein.
Claim 9
Dependent Claim
24 words
The combination as set forth in claim 7 wherein said combustion chamber has insulation about said ceramic oxide lining to diminish heat loss therefrom.
Claim 10
Dependent Claim
39 words
The combination as set forth in claim 1 wherein said combustion chamber has a mouth opening into said flue, said mouth being uninterrupted and being of a diameter approximately equal to the largest internal diameter of said combustion chamber.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |