Patent US3829285A successfully refreshed from Google Patents.
US3829285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recuperators for incinerators
Assignee: BERLIN FOUNDRY Corp A CORP OF WI
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Filing: 1973-02-28
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Granted: 1974-08-13
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Expires: 1993-02-28
Abstract
Abstract A compact, low cost heat recuperator for incinerators and the like having one or more heat exchange tubes with internal and external fins, positioned within an outer tubular shell. Means at one end of the shell hold the heat exchange tubes in fixed position, and an expansion seal is provided at the other. Means are provided for conducting exhaust gases through the heat exchange tubes and process air around the heat exchange tubes for preheating. Connecting means are disclosed for attaching the recuperator assembly to an existing incinerator so that minimum modifications are required.
Inventors
- 👤 J Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/42; F23; F23G; F23G5/00; F23G5/44; F23G5/46; F23L; F23L15/00; F23L15/04; F28F1/422; Y; Y02; Y02E; Y02E20/00; Y02E20/34; Y10; Y10S; Y10S122/00; Y10S122/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
A recuperator assembly adapted for adding on to an existing incinerator between the main housing and exhaust stack thereof for preheating process air to be burned therein comprising: a. a generally cylindrical elongated shell; b. means attached to the bottom end of said shell for mounting said shell in vertical position on the main housing of the incinerator over the exhaust flu thereof; c. a heat exchange tube having internal and external fins, said internal fins arranged and configured to impart a swirling flow to gases passing through said heat exchange tube; d. means attached to the top end of said shell for mounting said heat exchange tube coaxially within said shell in alignment with the exhaust flue, the inside diameter of said shell being slightly larger than the outside diameter of said heat exchange tube plus fins, to define a heating passage therebetween; e. means defining a sand expansion seal around the bottom of said shell and heat exchange tube; f. a process air inlet port in said shell near the top end thereof; g. a process air outlet port in said shell near the bottom end thereof; and h. means for conducting the preheated process air from said outlet port to the intake of the incinerator.
Claim 2
Dependent Claim
208 words
A recuperator assembly adapted for adding on to an existing incinerator between the main housing and exhaust stack thereof for preheating process air to be burned therein comprising: a. a generally cylindrical elongated shell; b. means attached to the bottom end of said shell for mounting said shell in vertical position on the main housing of the incinerator over the exhaust flu thereof; c. a heat exchange tube having internal and external fins, said internal fins arranged and configured to impart a swirling flow to gases passing through said heat exchange tube; d. means attached to the top end of said shell for mounting said heat exchange tube coaxially within said shell in alignment with the exhaust flue, the inside diameter of said shell being slightly larger than the outside diameter of said heat exchange tube plus fins, to define a heating passage therebetween; e. means defining a sand expansion seal around the bottom of said shell and heat exchange tube; f. a process air inlet port in said shell near the top end thereof; g. a process air outlet port in said shell near the bottom end thereof; and h. means for conducting the preheated process air from said outlet port to the intake of the incinerator.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |