Patent US4907648A successfully refreshed from Google Patents.
US4907648A
Expired / Lapsed
US
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Plastic crosscurrent heat exchanger
Assignee: Roehm GmbH Darmstadt
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Filing: 1988-10-31
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Granted: 1990-03-13
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Expires: 2008-10-31
Abstract
Abstract A crosscurrent heat exchanger body made up of a stack of joined, parallel flow web plates (1), and a hollow chamber (5) for flow across them between each two successive web plates, with the cover layers (2,2') of successive web plates being sloped toward one another at their ends over the hollow chamber (5) enclosed between them, and being joined tightly to one another over the entire width, is disclosed.
Inventors
- 👤 Friedel Emmerich
- 👤 Dieter Franitza
- 👤 Heinrich Hartmann
- 👤 Klaus Kerk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:30
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0062; B; B27; B27N; B27N5/00; B27N5/02; F28F; F28F21/00; F28F21/06; F28F21/065; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/373; Y10S165/384
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
A crosscurrent heat exchanger body, which comprises: a stack of joined plastic flow web plates (1), consisting of two planar, parallel cover plates (2) and parallel webs (3) joined integrally to said cover plates, which enclose parallel hollow flow chambers (4), with a number of web plates being arranged in a stack so that their hollow chambers can carry flow in parallel, and so that a hollow cross-flow chamber (5) is located between each of two such web plates in succession in the stack, wherein the cover layers (2, 2') of each two web plates that are adjacent to a cross-flow hollow chamber (5) are sloped toward one another at their ends across the hollow chamber (5) between them, and are joined to one another over the entire width, and wherein said hollow cross-flow chambers (5) contain spacers (6) of the thickness of the hollow chambers, said spacers (6) containing hollow cross-flow chambers (7).
Claim 2
Dependent Claim
154 words
A crosscurrent heat exchanger body, which comprises: a stack of joined plastic flow web plates (1), consisting of two planar, parallel cover plates (2) and parallel webs (3) joined integrally to said cover plates, which enclose parallel hollow flow chambers (4), with a number of web plates being arranged in a stack so that their hollow chambers can carry flow in parallel, and so that a hollow cross-flow chamber (5) is located between each of two such web plates in succession in the stack, wherein the cover layers (2, 2') of each two web plates that are adjacent to a cross-flow hollow chamber (5) are sloped toward one another at their ends across the hollow chamber (5) between them, and are joined to one another over the entire width, and wherein said hollow cross-flow chambers (5) contain spacers (6) of the thickness of the hollow chambers, said spacers (6) containing hollow cross-flow chambers (7).
Claim 3
Dependent Claim
38 words
The crosscurrent heat exchanger body according to claim 1, wherein at least some of the spacers (6) have lateral extensions (8) that extend into the joint of the cover layers (2, 2') and are likewise joined to them.
Claim 4
Dependent Claim
36 words
The crosscurrent heat exchanger body according to claim 1, wherein the webs are cut away in the end area of the web plates (2) at least to the depth at which the cover layers are sloped.
Claim 5
Dependent Claim
22 words
The crosscurrent heat exchanger body according to claim 1, wherein the cover layers (2, 2') are joined by a welded seam (9).
Claim 6
Dependent Claim
54 words
The crosscurrent heat exchanger body according to claim 1, wherein the spacers (6) with cross-flow through hollow chambers (7) substantially fill the hollow chambers (5) and are shaped at their ends extending laterally out of the stack in the same way as the web plates (1), and successive spacers are joined to one another.
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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) | 1993-03-12 | 1993-09-11 | 1994-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-12 | 1997-09-11 | 1998-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-12 | 2001-09-11 | 2002-03-13 | $7700.00 | Window Closed / Lapsed |