Patent US3829945A successfully refreshed from Google Patents.
US3829945A
Expired / Lapsed
US
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Method of producing a heat exchanger
Assignee: Caterpillar Energy Solutions GmbH
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Filing: 1973-07-11
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Granted: 1974-08-20
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Expires: 1993-07-11
Abstract
Abstract A heat exchanger includes a rectangular housing consisting of four lateral walls and closely receiving a heat-transfer corrugated sheet. Two heat-exchange gases flow at the respective opposite surfaces of the sheet in the furrows defined by the sheet and are supplied to and discharged from the furrows via apertures through two opposite walls of the housing. Plate-form sealing elements of refractory material are caused to press firmly against respective opposite corrugated edges of the sheet by plate-like end members closing the ends of the housing and a spring disposed between one end member and the nearer sealing element.
Inventors
- 👤 H Kanzler
- 👤 H Aupor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:11
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D22/00; B21D22/02; B21D22/027; F; F28; F28D; F28D9/00; F28D9/0025; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
In a method of producing a heat exchanger comprising a corrugated metal sheet which forms a heat transfer wall, the steps of inserting spacers into furrows alternating with folds of said sheet but so as to leave said folds exposed, clamping together said spacers with the interposition of said sheet, and pressing portions of said folds inwards simultaneously with a bar-like tool to form at said folds projecting portions of said sheet which serve to maintain the width of said furrows.
Claim 2
Dependent Claim
81 words
In a method of producing a heat exchanger comprising a corrugated metal sheet which forms a heat transfer wall, the steps of inserting spacers into furrows alternating with folds of said sheet but so as to leave said folds exposed, clamping together said spacers with the interposition of said sheet, and pressing portions of said folds inwards simultaneously with a bar-like tool to form at said folds projecting portions of said sheet which serve to maintain the width of said furrows.
References Cited (Backward Citations)
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US3211219A
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US3372453A
Cited
US3601185A
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US3787944A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |