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US4649991A Expired / Lapsed US ⏱️ 0.0 years remaining

Cross-counter-stream module for heat or mass exchange

Assignee: Akzo NV
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Filing: 1981-12-22
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Granted: 1987-03-17
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Expires: 2001-12-22
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Abstract

Abstract A cross-counter-stream module for material and/or heat exchange done with a hollow filament bundle cast into a housing at its ends and a mechanism for conducting the material flow to the outside of the hollow filaments. The hollow filaments are cast at their ends as a stack into a housing, the stack being composed of one or more layers which consist of strata of hollow filaments fixed in a plane through cross-pieces transverse to their lumen directions, the cross-pieces being arranged tightly superimposed at all locations inside one layer, disposed at predetermined constant intervals, with the intermediate spaces between the hollow filaments filled by the cross-pieces at the places of crossing, and with the cross-pieces composed of a polymer with a melting point from 80° to 190° C. and a residual adhesion at room temperature. Preferably, the polymer is a polyamide, a polyethylene, a copolymer of polyethylene and vinyl acetate, or a copolyether-ester. Preferred embodiments include that the cross-pieces display a substantially round cross-section; that the cross-piece diameter correspond to 1.5 to 4 times the hollow filament diameter; that the cross-pieces are put in as warp; that the stack is composed of several layers; that the intervals between adjacent cross-pieces amount to 1-20 cm; and that the cross-piece intervals in different layers form whole number ratios.

Inventors

  • 👤 Clemens Neuhaus
  • 👤 Rudiger Lucks
  • 👤 Hans G. Breidohr
  • 👤 Gerhard Wick

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 07:27
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/06; F28F21/062; B; B01; B01D; B01D2313/00; B01D2313/20; B01D2313/22; B01D2313/221; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/416; Y10S165/423; Y10S165/905

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 105 words
Cross-counter-stream material and heat exchange unit comprising a housing, cross-pieces and a stack of hollow filaments cast at their ends in said housing, the hollow filaments secured in a pre-determined pattern, with said cross-pieces tightly superimposed on one another substantially throughout their length and substantially surrounding each filament to allow fluid flow in a predetermined pattern, said cross-pieces being composed of a polymer with a melting point from 80° to 190° C. and with a residual adhesion at room temperature and wherein said cross-pieces have a diameter, the diameter of said cross-pieces corresponding to about 1.5 to 4 times the diameter of said hollow filaments.
Claim 2
Dependent Claim 105 words
Cross-counter-stream material and heat exchange unit comprising a housing, cross-pieces and a stack of hollow filaments cast at their ends in said housing, the hollow filaments secured in a pre-determined pattern, with said cross-pieces tightly superimposed on one another substantially throughout their length and substantially surrounding each filament to allow fluid flow in a predetermined pattern, said cross-pieces being composed of a polymer with a melting point from 80° to 190° C. and with a residual adhesion at room temperature and wherein said cross-pieces have a diameter, the diameter of said cross-pieces corresponding to about 1.5 to 4 times the diameter of said hollow filaments.
Claim 3
Dependent Claim 40 words
Cross-counter-stream unit according to claim 1, wherein said polymer is selected from the group consisting of polyamide, polyethylene, copolymer of polyethylene and vinyl acetate, and copolyether-ester and the melting point of the polymer amounts to between 100° and 160° C.
Claim 4
Dependent Claim 14 words
Cross-counter-stream module according to claim 1, wherein the cross-pieces display a substantially round cross-section.
Claim 5
Dependent Claim 22 words
Cross-counter-stream module according to claim 1, wherein the cross-piece diameter corresponds to 1.8 to 2.2 times the diameter of the hollow filaments.
Claim 6
Dependent Claim 20 words
Cross-counter-stream module according to claim 1, wherein the hollow filaments are mounted on warps and the cross-pieces contact the warps.
Claim 7
Dependent Claim 69 words
Cross-counter-stream unit according to claim 1, wherein the stack is composed of several layers put into a pattern, each layer having a plurality of separate groups of tightly superimposed cross-pieces, with a ratio of distances between cross-piece groups along the axis of the tubes in one layer to distances between cross-piece groups along the axis of the tubes in another layer of said stack being a whole number ratio.
Claim 8
Dependent Claim 24 words
Cross-counter-stream module according to claim 1, wherein intervals between adjacent cross-pieces along the axis of the tubes amount to between 1 and 20 cm.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-03-16 1990-09-15 1991-03-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-03-16 1994-09-15 1995-03-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-03-16 1998-09-15 1999-03-17 $7700.00 Window Closed / Lapsed

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