US4089302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast metal heat exchanger, as well as mould therefor
Assignee: REMEHA FABRIEKEN BR NETHERLANDS
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Filing: 1976-05-12
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Granted: 1978-05-16
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Expires: 1996-05-12
Abstract
Abstract Cast metal heat exchanger and mould therefor, in particular a fired central heating boiler operating on water or medium circulation, with two or more externally ribbed, hollow sections through which the water and about which the flue gases can flow, wherein the sections are cast integrally in sealed form at their end edges with sidewalls and end walls extending over the entire boiler length, except for the gas and water communication openings, on the side where the water and flue gas are present with respect to the outside atmosphere.
Inventors
- 👤 Johann Maria Ensink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:27
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/0535; B; B22; B22C; B22C9/00; B22C9/22; B22C9/24; B22C9/26; F24; F24H; F24H1/00; F24H1/22; F24H1/38; F28F; F28F21/00; F28F21/08; F28F21/088
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
120 words
A cast metal heat exchanger comprising a plurality of sections, each said section comprising at least a pair of spaced apart means for defining passages for a first fluid and wall means defining hollows therebetween for the passage of a said first fluid, said hollows being in fluid communication with the passages defined by said spaced apart means, said wall means comprising heat exchange projections on the exterior thereof, the passage defining means of a first said section being cast integral and in fluid communication with the passage defining means of a section adjacent thereto, and passage means defined by the exteriors of adjacent wall means for the passage of a second fluid in contact with the said projections thereon.
Claim 2
Dependent Claim
120 words
A cast metal heat exchanger comprising a plurality of sections, each said section comprising at least a pair of spaced apart means for defining passages for a first fluid and wall means defining hollows therebetween for the passage of a said first fluid, said hollows being in fluid communication with the passages defined by said spaced apart means, said wall means comprising heat exchange projections on the exterior thereof, the passage defining means of a first said section being cast integral and in fluid communication with the passage defining means of a section adjacent thereto, and passage means defined by the exteriors of adjacent wall means for the passage of a second fluid in contact with the said projections thereon.
Claim 3
Dependent Claim
34 words
The cast metal heat exchanger of claim 1, said sections being sealed except for access openings communicating with said passage defining means of each end section, and except for the last mentioned passage means.
References Cited (Backward Citations)
US1924952A
Cited
US3533379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |