Patent US4172164A successfully refreshed from Google Patents.
US4172164A
Expired / Lapsed
US
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Metal strip for the production of heat exchangers
Assignee: Rio Tinto Switzerland AG
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Filing: 1978-05-30
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Granted: 1979-10-23
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Expires: 1998-05-30
Abstract
Abstract A metal strip is used for elements in a regenerative heat exchanger employed for the exchange of latent and sensible heat from a warm outgoing air stream to a cold ingoing air stream. The strip is placed alternatingly in the form of flat and corrugated sheets to form flow channels for the warm and cold air. The metal strip, for example, an aluminum foil, is coated or laminated at least on one side with a paper-like hydrophillic material. The hydrophillic layer comprises a mixture of cellulose fibers and fibers with olefin hydrocarbons as basis. Furthermore, fungicides can be added to the mixture.
Inventors
- 👤 Horst Meyer
- 👤 Manfred Gerber
- 👤 Klaus Oehlmann
- 👤 Ewald Reichardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:45
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/14; F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1423; B32B3/00; B32B3/26; B32B3/28; B32B5/00; B32B5/02; F28; F28D; F28D19/00; F28D19/04; F28D19/041; F28D19/042; B32B2262/00; B32B2262/10; B32B2262/14; B32B2264/00; B32B2264/10; B32B2264/102; B32B2307/00; B32B2307/70; B32B2307/728; F24F2203/00; F24F2203/10; F24F2203/1032; F24F2203/1036; F24F2203/104; F24F2203/1048; F24F2203/1068; F24F2203/1084; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/24; Y10T428/24628; Y10T428/24661; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
Regenerative heat exchanger elements for the exchange of sensible and latent heat from a warm outgoing air stream to a cold ingoing air stream in a regenerative heat exchanger which comprises laminated metal strips coated on both sides with a paper-like hydrophillic material comprising a mixture of cellulose fibers and fibers based on polymerized olefin hydrocarbons in which corrugated and flat sheets of said strips are alternatingly combined to form flow channels.
Claim 2
Dependent Claim
72 words
Regenerative heat exchanger elements for the exchange of sensible and latent heat from a warm outgoing air stream to a cold ingoing air stream in a regenerative heat exchanger which comprises laminated metal strips coated on both sides with a paper-like hydrophillic material comprising a mixture of cellulose fibers and fibers based on polymerized olefin hydrocarbons in which corrugated and flat sheets of said strips are alternatingly combined to form flow channels.
Claim 3
Dependent Claim
27 words
A heat exchanger element according to claim 1 in which the mixture of fibers includes fibers selected from the group consisting of low pressure polyethylene and polypropylene.
Claim 4
Dependent Claim
29 words
A heat exchanger element according to claim 1 in which to the mixture of fibers about ten to sixty parts by volume of fibers of mineral wool is added.
Claim 5
Dependent Claim
28 words
A heat exchanger element according to claim 2 in which to the mixture of fibers, fibers selected from the group consisting of wallastonite and glass wool are added.
Claim 6
Dependent Claim
16 words
A heat exchanger element according to claim 1 in which alumina is added to the mixture.
Claim 7
Dependent Claim
19 words
A heat exchanger element according to claim 1 in which at least one fungicide is added to the mixture.
Claim 8
Dependent Claim
33 words
A heat exchanger element according to claim 1 in which the hydrophillic layer is joined to the metal strip by means of a laminate medium with sodium or potassium silicate as its basis.
Claim 9
Dependent Claim
25 words
A heat exchanger element according to claim 1 in which the hydrophillic layer is joined to the metal strip by means of water soluble resins.
Claim 10
Dependent Claim
34 words
A heat exchanger element according to claim 1 wherein said laminated strips are capable of absorbing moisture from waste gases in cooling processes and are able to release the heat to the cold air.
Claim 11
Dependent Claim
13 words
A heat exchanger element according to claim 1 wherein said metal is aluminum.
Claim 12
Dependent Claim
19 words
A heat exchanger element according to claim 1 wherein said elements comprise a rotary unit mounted in a housing.
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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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |