Patent US3879944A successfully refreshed from Google Patents.
US3879944A
Expired / Lapsed
US
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Catalytic converter
Assignee: Motors Liquidation Co
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Filing: 1974-03-20
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Granted: 1975-04-29
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Expires: 1994-03-20
Abstract
Abstract A catalytic converter has a cylindrical can with open ends. Exhaust gases admitted through one end may flow through a first catalyst bed to openings in the side wall of the can or through the narrow end of a funnel shaped container projecting through an opening in the center of the first catalyst bed. A second catalyst bed, coaxial with the first, is placed in the wide end of the funnel shaped container to increase the catalyst bed flow area. A housing containing the can has walls which define an annular passage around the can through which the exhaust gases flow upon emerging from the beds to increase heating of the catalyst beds for faster catalyst warm-up.
Inventors
- 👤 Joseph F Bertsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:30
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2846; F01N13/00; F01N13/011; F01N3/2882; F01N3/2889; F01N13/08; F01N13/10; F01N2240/00; F01N2240/02; F01N2330/00; F01N2330/08; F01N2450/00; F01N2450/30; F01N2470/00; F01N2470/18; F01N2510/00; F01N2510/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
215 words
A device for the catalytic treatment of exhaust gases from an engine comprising, in combination: a first can having two open ends, one of said open ends comprising an inlet opening for admittance of said exhaust gases, said first can having a further opening in the wall thereof; a second can within the first can, said second can being funnelshaped with a wide open end in engagement with the other open end of the first can and a narrow open end projecting past the wall opening toward the inlet end of the first can; a first catalyst bed in the first can surrounding the narrow end of the second can, said first catalyst bed being located in the path of exhaust gases flowing toward said wall opening; a second catalyst bed in the wide end of the second can in the path of exhaust gases flowing through said second can, the second catalyst bed having a frontal area for said exhaust gases greater than the flow area in the narrow end of the second can; and housing means surrounding said cans, said housing means defining a flow path for exhaust gases back along the outside of the first can whereby the heating of the first and second catalyst beds by the exhaust gases is increased.
Claim 2
Independent Claim
215 words
A device for the catalytic treatment of exhaust gases from an engine comprising, in combination: a first can having two open ends, one of said open ends comprising an inlet opening for admittance of said exhaust gases, said first can having a further opening in the wall thereof; a second can within the first can, said second can being funnelshaped with a wide open end in engagement with the other open end of the first can and a narrow open end projecting past the wall opening toward the inlet end of the first can; a first catalyst bed in the first can surrounding the narrow end of the second can, said first catalyst bed being located in the path of exhaust gases flowing toward said wall opening; a second catalyst bed in the wide end of the second can in the path of exhaust gases flowing through said second can, the second catalyst bed having a frontal area for said exhaust gases greater than the flow area in the narrow end of the second can; and housing means surrounding said cans, said housing means defining a flow path for exhaust gases back along the outside of the first can whereby the heating of the first and second catalyst beds by the exhaust gases is increased.
Claim 3
Dependent Claim
363 words
An engine exhaust system comprising: an exhaust manifold defining an exhaust collection passage adapted to receive exhaust gases from the engine and an exit passage, the manifold including an internal opening between the exhaust collection and exit passages, an external opening from the exit passage, a first mounting flange surrounding the internal opening and extending through the exit passage toward the external opening and a second mounting flange surrounding the external opening and first mounting flange and extending outward from the manifold; a generally cylindrical casing having an open end sealingly engaged with the second mounting flange and a closed end; an outer can within the casing, the outer can having an open end sealingly engaged with the first mounting flange and another end engaged with the closed end of the housing, the outer can having a first circumferential ring of openings therethrough near its other end and a second circumferential ring of openings between the first circumferential ring and the open end, the outer can and casing forming an annular passage therebetween open to the exit passage at one end and to the interior of the outer can through the second circumferential ring of openings; an inner can within the outer can, the inner can having a generally funnel-shaped configuration with narrow and wide open ends, the wide end being fixed within the other end of the outer can between the first and second circumferential rings, whereby the annular passage communicates with the interior of the inner can through the first circumferential ring of openings; and the narrow end extending past the second circumferential ring; a first catalyst bed in the outer can, the first Catalyst bed being of annular configuration encircling the inner can between the narrow end thereof and the second circumferential ring of openings in the outer can so as to treat exhaust gases flowing through the second circumferential ring of openings; and a second catalyst bed in the inner can near its wide end to treat exhaust gases flowing through the first circumferential ring of openings, the second catalyst bed having a larger frontal flow area than the flow area of the narrow end of the inner can.
Claim 4
Dependent Claim
363 words
An engine exhaust system comprising: an exhaust manifold defining an exhaust collection passage adapted to receive exhaust gases from the engine and an exit passage, the manifold including an internal opening between the exhaust collection and exit passages, an external opening from the exit passage, a first mounting flange surrounding the internal opening and extending through the exit passage toward the external opening and a second mounting flange surrounding the external opening and first mounting flange and extending outward from the manifold; a generally cylindrical casing having an open end sealingly engaged with the second mounting flange and a closed end; an outer can within the casing, the outer can having an open end sealingly engaged with the first mounting flange and another end engaged with the closed end of the housing, the outer can having a first circumferential ring of openings therethrough near its other end and a second circumferential ring of openings between the first circumferential ring and the open end, the outer can and casing forming an annular passage therebetween open to the exit passage at one end and to the interior of the outer can through the second circumferential ring of openings; an inner can within the outer can, the inner can having a generally funnel-shaped configuration with narrow and wide open ends, the wide end being fixed within the other end of the outer can between the first and second circumferential rings, whereby the annular passage communicates with the interior of the inner can through the first circumferential ring of openings; and the narrow end extending past the second circumferential ring; a first catalyst bed in the outer can, the first Catalyst bed being of annular configuration encircling the inner can between the narrow end thereof and the second circumferential ring of openings in the outer can so as to treat exhaust gases flowing through the second circumferential ring of openings; and a second catalyst bed in the inner can near its wide end to treat exhaust gases flowing through the first circumferential ring of openings, the second catalyst bed having a larger frontal flow area than the flow area of the narrow end of the inner can.
References Cited (Backward Citations)
US3824788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |