US5266279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter or catalyst body
Assignee: Schwaebische Huettenwerke Automotive GmbH
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Filing: 1992-03-19
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Granted: 1993-11-30
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Expires: 2012-03-19
Abstract
Abstract A filter or catalyst body for removing harmful constituents from the waste gases of an internal combustion engine, especially a diesel engine, is provided with at least one fabric layer of metal wires or metal fibers. Sintering material in the form of powder, granules, fiber fragments or chips is introduced into the meshes and is sintered on to the wires or fibers. The woven fabric is in the form of a twilled wire fabric (1), sintering material (4) being introduced into the meshes (5) thereof and being sintered together with the wires or fibers (2, 3).
Inventors
- 👤 Hans A. Haerle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:02
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/02; B01D39/06; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/9454; B01D39/10; B01D39/12; B01J; B01J35/00; B01J35/50; B01J35/58; B01J37/00; B01J37/02; B01J37/0215; F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/022; F01N3/0226; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2835; F01N2330/00; F01N2330/10; F01N2330/12; F01N2330/14; F02; F02B; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
80 words
A filter for removing harmful constituents from the waste gases of an internal combustion engine, said filter having a feed and a delivery end, comprising at least one layer of woven fabric of metal wires or metal fibers, sintering material in a form selected from the group consisting of powder, granules, fiber fragments and chips being introduced into said fabric sintered onto the wires or fibers, wherein the woven fabric and is in the form of a twilled wire fabric.
Claim 2
Dependent Claim
80 words
A filter for removing harmful constituents from the waste gases of an internal combustion engine, said filter having a feed and a delivery end, comprising at least one layer of woven fabric of metal wires or metal fibers, sintering material in a form selected from the group consisting of powder, granules, fiber fragments and chips being introduced into said fabric sintered onto the wires or fibers, wherein the woven fabric and is in the form of a twilled wire fabric.
Claim 3
Dependent Claim
18 words
The filter according to claim 1, wherein said woven fabric is a 4-shaft or 5-shaft twilled wire fabric.
Claim 4
Dependent Claim
29 words
The filter according to claim 1 wherein the sintering material comprises a material selected from the group consisting of ceramics, plastics, metal, steel, a steel alloy, and mixtures thereof.
Claim 5
Dependent Claim
29 words
The filter according to claim 1, wherein the wires or fibers are woven in warp and weft directions and have the same diameter in said warp and weft directions.
Claim 6
Dependent Claim
38 words
The filter according to claim 1, wherein the woven fabric has a mesh width and the wires or fibers have a diameter, wherein the ratio between the mesh width and the wire or fiber diameter is about 1:1.
Claim 7
Dependent Claim
22 words
The filter according to claim 5, wherein the mesh width or the wire or fiber diameter is between 0.15 and 0.30 mm.
Claim 8
Dependent Claim
49 words
The filter according to claim 1, wherein the wires or fibers of the woven fabric have a cross sectional diameter and are curved in such a manner that the woven fabric has a thickness of approximately 2.5 times the diameter of the wires or fibers of the woven fabric.
Claim 9
Dependent Claim
21 words
The filter according to claim 1, wherein said wires or fibers are steel wires containing approximately 20% nickel and 25% chromium.
Claim 10
Dependent Claim
27 words
The filter accordingly to claim 1, wherein the woven fabric is designed with a smooth surface on one side and a rough surface on the opposite side.
Claim 11
Dependent Claim
21 words
The filter of claim 1, further including a first layer of said woven fabric having a rough surface as its exterior.
Claim 12
Dependent Claim
20 words
The filter according to claim 1, wherein several layers of said woven fabric are joined together to form one body.
Claim 13
Dependent Claim
27 words
The filter of claim 1, wherein the woven fabric is coated at the feed end with catalysts for lowering the ignition temperature of products to be burned.
Claim 14
Dependent Claim
33 words
The filter of claim 1, wherein the woven fabric is provided at the delivery end with a catalytic coating for removing carbon monoxide, carbon dioxide, harmful hydrocarbons, nitrogen oxide and other undesirable gases.
Claim 15
Dependent Claim
14 words
The filter of claim 1, wherein said twilled woven fabric is a satin weave.
Claim 16
Dependent Claim
114 words
Process for producing a filter or catalyst body for removing harmful constituents from the waste gases of an internal combustion engine, especially a diesel engine, comprising the steps of providing at least one woven fabric layer of metal wires or metal fibers, introducing a sintering material in a form selected from the group consisting of powder, granules, fiber fragments and chips into the woven fabric and then sintering together the sintering material with the wires or fibers wherein the woven fabric is in the form of a twilled wire or fiber fabric and the sintering material is introduced via a binder, after which the wires or fibers and the sintering material are sintered together.
Claim 17
Dependent Claim
114 words
Process for producing a filter or catalyst body for removing harmful constituents from the waste gases of an internal combustion engine, especially a diesel engine, comprising the steps of providing at least one woven fabric layer of metal wires or metal fibers, introducing a sintering material in a form selected from the group consisting of powder, granules, fiber fragments and chips into the woven fabric and then sintering together the sintering material with the wires or fibers wherein the woven fabric is in the form of a twilled wire or fiber fabric and the sintering material is introduced via a binder, after which the wires or fibers and the sintering material are sintered together.
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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) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |