Patent US5657818A successfully refreshed from Google Patents.
US5657818A
Expired / Lapsed
US
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Permeable structure
Assignee: Ceramtec GmbH
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Filing: 1993-11-10
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Granted: 1997-08-19
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Expires: 2013-11-10
Abstract
Abstract In the permeable structure, which is built up of sheets, continuous channels are arranged in rows and between the rows of channels are formed flow spaces which at opposite sides are bounded bit cover plates. In the flow spaces (4) at least two successive transverse bridges (6) are arranged on the same level, the transverse bridges (6) in at least half of the sheets having a different length (B) and the channels (1) extending essentially perpendicular to the flow spaces (4).
Inventors
- 👤 Jurgen Bottcher
- 👤 Rudolf Ganz
- 👤 Jurgen Heinrich
- 👤 Otto Heinz
- 👤 Rudiger Herrmann
- 👤 Jorg Honerlage
- 👤 Axel Reinhold
- 👤 Heinrich Schelter, deceased
- 👤 Matthias Simmerl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:47
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/04; F28F3/00; F28F3/08; F28F3/086
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
148 words
A permeable structure comprising: a plurality of superimposed sheets; at least two first openings located in the sheets; at least two continuous individual channels defined by said first openings when the sheets are superimposed, wherein the continuous channels are arranged in rows which are essentially parallel to one another; at least two second openings located in the sheets; flow spaces defined by said second openings, wherein the flow spaces are arranged in a direction perpendicular, to and in between, the rows of the continuous channels; at least two successive transverse bridges arranged in the flow spaces and on the same level, wherein the length of at least one pair of successive transverse bridges in at least half of the sheets are different, and wherein the transverse bridges are arranged one after the other in longitudinal directions essentially parallel to the planes of the rows of the continuous channels.
Claim 2
Dependent Claim
148 words
A permeable structure comprising: a plurality of superimposed sheets; at least two first openings located in the sheets; at least two continuous individual channels defined by said first openings when the sheets are superimposed, wherein the continuous channels are arranged in rows which are essentially parallel to one another; at least two second openings located in the sheets; flow spaces defined by said second openings, wherein the flow spaces are arranged in a direction perpendicular, to and in between, the rows of the continuous channels; at least two successive transverse bridges arranged in the flow spaces and on the same level, wherein the length of at least one pair of successive transverse bridges in at least half of the sheets are different, and wherein the transverse bridges are arranged one after the other in longitudinal directions essentially parallel to the planes of the rows of the continuous channels.
Claim 3
Dependent Claim
17 words
A structure as claimed in claim 1, wherein the channels run linearly and parallel to one another.
Claim 4
Dependent Claim
47 words
A structure as claimed in claim 1, wherein the essential parallel channels include rows formed by offsetting the centers of the first opening from the common axis of the row of first openings whereby the channels formed by the first openers have a stepped or helical surface.
Claim 5
Dependent Claim
18 words
A structure as claimed in claim 1, wherein the individual channels have a constant cross-section over their length.
Claim 6
Dependent Claim
18 words
A structure as claimed in claim 1, wherein the individual channels have a variable cross-section over their length.
Claim 7
Dependent Claim
21 words
A structure as claimed in claim 1, wherein the cross-sections of the individual channels vary among themselves from channel to channel.
Claim 8
Dependent Claim
33 words
A structure as claimed in claim 1, wherein a first channel of a row has a larger cross-section than remaining channels which form the row and is partly surrounded by the flow spaces.
Claim 9
Dependent Claim
16 words
A structure as claimed in claim 1, wherein the flow spaces have a constant width (A).
Claim 10
Dependent Claim
19 words
A structure as claimed in claim 1, wherein the width of the flow spaces varies in the flow direction.
Claim 11
Dependent Claim
18 words
A structure as claimed in claim 1, wherein the transverse bridges at the edges are provided with ribs.
Claim 12
Dependent Claim
32 words
A structure as claimed in claim 1, wherein the channels and the flow spaces are built up of differently cut sheets from a pattern that can be made in an endless form.
Claim 13
Dependent Claim
31 words
A structure as claimed in claim 1, further comprising cover plates, wherein the flow spaces at opposite sides are bounded by the cover plates which have openings for the continuous channels.
Claim 14
Dependent Claim
17 words
A structure as claimed in claim 11, wherein the cover plates are provided with a fitted frame.
Claim 15
Dependent Claim
65 words
A method of producing a permeable structure according to claim 1, comprising: (a) forming the first and second openings in the sheets by one or more of casting, sawing, milling, turning, deep-drawing, embossing, laser cutting, stamping or liquid-jet cutting; and (b) superimposing and joining the plurality of sheets by one or more of lamination with subsequent firing, soldering, welding, adhesive bonding or by mechanical means.
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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) | 2000-08-18 | 2001-02-17 | 2001-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-18 | 2005-02-17 | 2005-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-18 | 2009-02-17 | 2009-08-19 | $7700.00 | Window Closed / Lapsed |