US4324749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-dimensional exchange element for liquid guidance in liquid-gas contact systems
Assignee: Akzona Inc
•
Filing: 1980-06-18
•
Granted: 1982-04-13
•
Expires: 2000-06-18
Abstract
Abstract Three-dimensional exchange element for heat exchange units for gas/liquid systems which consists of filaments with a diameter of 0.1 to 2.5 mm, such filaments, which are welded together at their interlacing points, being arranged in a level plane showing equidistantly spaced hump-like projections.
Inventors
- 👤 Jurgen Bronner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:08
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; F28F25/087; Y; Y10; Y10S; Y10S261/00; Y10S261/11; Y10S261/72
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
159 words
In a liquid-gas contact system wherein said liquid-gas comprises a vertical tower which contains a heat exchange unit through which water flows countercurrently or cross-currently to a stream of gas flowing therethrough, the improvement of said a heat exchange unit comprising a plurality of 3-dimensional, mutually supporting exchange elements arranged side-by-side, in contact with each adjacent element and each of said elements comprising randomly intersecting synthetic filaments having a diameter of about 0.1 to 2.5 mm, fused at their points of intersection, wherein said filaments form a self-supporting planar web with a density of from 5 to 10 kg per cubic meter and having hump-like projections of a substantially identical height of from about 20 to about 70 mm at regular intervals on the face of said planar web, said projections comprising contact surfaces for adjacent elements of like construction, wherein said elements are positioned parallel to each other and in contact with an adjacent element at said projections.
Claim 2
Dependent Claim
159 words
In a liquid-gas contact system wherein said liquid-gas comprises a vertical tower which contains a heat exchange unit through which water flows countercurrently or cross-currently to a stream of gas flowing therethrough, the improvement of said a heat exchange unit comprising a plurality of 3-dimensional, mutually supporting exchange elements arranged side-by-side, in contact with each adjacent element and each of said elements comprising randomly intersecting synthetic filaments having a diameter of about 0.1 to 2.5 mm, fused at their points of intersection, wherein said filaments form a self-supporting planar web with a density of from 5 to 10 kg per cubic meter and having hump-like projections of a substantially identical height of from about 20 to about 70 mm at regular intervals on the face of said planar web, said projections comprising contact surfaces for adjacent elements of like construction, wherein said elements are positioned parallel to each other and in contact with an adjacent element at said projections.
Claim 3
Dependent Claim
13 words
The 3-dimensional exchange element of claim 1, wherein the hump-like projections are truncated.
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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) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |