US3926565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning exhaust gases
Assignee: Evonik Operations GmbH
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Filing: 1974-03-12
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Granted: 1975-12-16
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Expires: 1994-03-12
Abstract
Abstract An apparatus for cleaning an exhaust gas comprising an elongated housing capable of receiving a catalyst monolith, said housing provided at one end with an exhaust gas entry opening, and provided at the other end with an exhaust gas discharge opening, at least two bridges spaced apart within said housing and attached to said housing, at least one supporting rod for said monolith, said rod secured to one of said bridges and movably mounted on another of said bridges, a monolith catalyst having flow channels and at least one bore for receiving said at least one supporting rod, said bore being provided in the direction of said flow channels, and an elastic intermediate layer surrounding said at least one supporting rod, said catalyst held on said rods by said layer being under pressure. The apparatus is especially useful for cleaning exhaust gases from internal combustion engines.
Inventors
- 👤 Gerhard Birtigh
- 👤 Horst Parbel
- 👤 Heinrich Sauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:46
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2842; F01N2260/00; F01N2260/02; F01N2260/022
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
176 words
AN APPARATUS FOR CLEANING AND EXHAUST GAS COMPRISING AN ELONGATED METAL HOUSING CAPABLE OF RECEIVING A CATALYST CERAMIC MONOLITH, SAID HOUSING PROVIDED AT ONE END WITH AN EXHAUST GAS ENTRY OPENING, AND PROVIDED AT THE OTHER END WITH AN EXHAUST GAS DISCHARGE OPENING, AT LEAST TWO BRIDGE MEANS SPACED APART WITHIN SAID HOUSING AND ATTACHED TO SAID HOUSING, AT LEAST ONE SUPPORTING ROD FOR SAID NONOLITH, SAID ROD SECURED TO ONE OF SAID BRIDGE MEANS AND MOVABLY MOUNTED ON ANOTHER OF SAID BRIDGE MEANS, A CERAMIC MONOLITH CATALYST ELEMENT HAVING FLOW CHANNELS FOR CONVEYING THE EXHAUST GAS FROM THE ENTRY OPENING TO THE DISCHARGE OPENING AND AT LEAST ONE BORE FOR RECEIVING SAID AT LEAST ONE SUPPORT ROD AND THE LARGEST CROSS-SECTIONAL DIMENSION OF SAID CERAMIC BEING SMALLER THAN THE ADJACENT RESPECTIVE INTERNAL CROSS SECTIONAL DIMENSION OF SAID HOUSING TO FORM A SPACE THEREBETWEEN, SAID BORE BEING PROVIDED IN THE DIRECTION OF SAID FLOW CHANNELS, AND AN ELASTIC, INTERMEDIATE LAYER SURROUNDING SAID AT LEAST ONE SUPPORTING ROD AND HELD THEREON BY SAID LAYER BEING UNDER PRESSURE.
Claim 2
Independent Claim
176 words
AN APPARATUS FOR CLEANING AND EXHAUST GAS COMPRISING AN ELONGATED METAL HOUSING CAPABLE OF RECEIVING A CATALYST CERAMIC MONOLITH, SAID HOUSING PROVIDED AT ONE END WITH AN EXHAUST GAS ENTRY OPENING, AND PROVIDED AT THE OTHER END WITH AN EXHAUST GAS DISCHARGE OPENING, AT LEAST TWO BRIDGE MEANS SPACED APART WITHIN SAID HOUSING AND ATTACHED TO SAID HOUSING, AT LEAST ONE SUPPORTING ROD FOR SAID NONOLITH, SAID ROD SECURED TO ONE OF SAID BRIDGE MEANS AND MOVABLY MOUNTED ON ANOTHER OF SAID BRIDGE MEANS, A CERAMIC MONOLITH CATALYST ELEMENT HAVING FLOW CHANNELS FOR CONVEYING THE EXHAUST GAS FROM THE ENTRY OPENING TO THE DISCHARGE OPENING AND AT LEAST ONE BORE FOR RECEIVING SAID AT LEAST ONE SUPPORT ROD AND THE LARGEST CROSS-SECTIONAL DIMENSION OF SAID CERAMIC BEING SMALLER THAN THE ADJACENT RESPECTIVE INTERNAL CROSS SECTIONAL DIMENSION OF SAID HOUSING TO FORM A SPACE THEREBETWEEN, SAID BORE BEING PROVIDED IN THE DIRECTION OF SAID FLOW CHANNELS, AND AN ELASTIC, INTERMEDIATE LAYER SURROUNDING SAID AT LEAST ONE SUPPORTING ROD AND HELD THEREON BY SAID LAYER BEING UNDER PRESSURE.
Claim 3
Dependent Claim
33 words
An apparatus according to claim 1 in which one of said bridge means is positioned near said gas entry opening and one of said bridge means is positioned near said gas discharge opening.
Claim 4
Dependent Claim
26 words
An apparatus according to claim 1 in which said elastic, intermediate layer is a web of wire, spun glass, alumina-silica fibers, rock wool or asbestos wool.
Claim 5
Dependent Claim
21 words
An apparatus according to claim 1 in which sealing means are provided in said space between said housing and said monolith.
Claim 6
Dependent Claim
17 words
An apparatus according to claim 4 in which said sealing means comprises a gasket or a labyrinth.
Claim 7
Dependent Claim
34 words
An apparatus according to claim 4 in which the flow channels of the monolith are of substantially equal diameter and said space is less than about one-half of the diameter of a flow channel.
Claim 8
Dependent Claim
73 words
An apparatus according to claim 1 in which one of said bridge means is positioned near said gas entry opening and another of said bridge means is positioned near said gas discharge opening, and one end of at least one of said rods is attached to the bridge means near said gas entry opening and the other end of said rod is movably mounted on the bridge means near said gas discharge opening.
Claim 9
Dependent Claim
21 words
An apparatus according to claim 7 in which sealing means comprising a gasket or a labyrinth are provided in said space.
Claim 10
Dependent Claim
26 words
An apparatus according to claim 8 in which said elastic, intermediate layer is a web of wire, rock wool, asbestos wool, spun glass or alumina-silica fibers.
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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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |