US4330577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger wall element comprising natural fiber material drenched first with a salt solution and thereafter with a water glass binder
Assignee: Individual
•
Filing: 1980-04-23
•
Granted: 1982-05-18
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Expires: 2000-04-23
Abstract
Abstract A porous, hygroscopic heat exchanger wall element particularly consisting of a natural fiber material. The wall element is drenched with a salt solution, the salt is retained in the pores by means of an adhesive, such as water glass, and the wall element is preferably also drenched with glycerine and a fine grain metal powder for further reduction of the freezing point and improved heat transfer.
Inventors
- 👤 Axel N. A. Axlander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:15
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/147; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1317; Y10T428/1348
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
56 words
A heat exchanger wall element of porous hygroscopic material consisting of natural fiber material drenched with a salt solution for reducing the freezing point of water, characterized in that said salt-drenched wall element has also been drenched with water glass in order to retain the salt in the pores of said wall element during use thereof.
Claim 2
Dependent Claim
56 words
A heat exchanger wall element of porous hygroscopic material consisting of natural fiber material drenched with a salt solution for reducing the freezing point of water, characterized in that said salt-drenched wall element has also been drenched with water glass in order to retain the salt in the pores of said wall element during use thereof.
Claim 3
Dependent Claim
19 words
A heat exchanger wall element according to claim 1, wherein said wall element has also been drenched with glycerine.
Claim 4
Dependent Claim
29 words
A heat exchanger wall element according to claim 1, wherein said wall element has been drenched with a water solution containing about 20% water glass and about 50% glycerine.
Claim 5
Dependent Claim
28 words
A heat exchanger wall element according to any one of claims 2 or 3, wherein said wall element has also been impregnated with a fine grain metal powder.
Claim 6
Dependent Claim
15 words
A heat exchanger wall element according to claim 4, wherein said powder is aluminum powder.
Claim 7
Dependent Claim
15 words
A heat exchanger wall element according to claim 4, wherein said powder is copper powder.
Claim 8
Independent Claim
61 words
A method of manufacturing a heat exchanger wall element of porous hygroscopic material consisting of natural fiber material, comprising the steps of (a) first drenching said wall element with a salt solution for reducing the freezing point of water; and then (b) drenching said wall element with water glass in order to retain the salt in the pores of said element.
Claim 9
Independent Claim
61 words
A method of manufacturing a heat exchanger wall element of porous hygroscopic material consisting of natural fiber material, comprising the steps of (a) first drenching said wall element with a salt solution for reducing the freezing point of water; and then (b) drenching said wall element with water glass in order to retain the salt in the pores of said element.
Claim 10
Dependent Claim
15 words
A method according to claim 7, wherein said salt solution is a sodium chloride solution.
Claim 11
Dependent Claim
16 words
A method according to claim 7, wherein said water glass is contained in a water solution.
Claim 12
Dependent Claim
13 words
A method according to claim 9, wherein said water solution also contains glycerine.
Claim 13
Dependent Claim
17 words
A method according to claim 9, wherein said water solution is mixed with fine grain aluminum powder.
Claim 14
Dependent Claim
20 words
A heat exchanger wall element according to claim 9, wherein said water solution is mixed with fine grain copper powder.
Claim 15
Dependent Claim
29 words
A method according to claim 7, wherein said wall element is left to drain after being drenched with said salt solution and before being drenched with said water solution.
References Cited (Backward Citations)
FR2353036B3
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |