US3724218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust reactor and method of making
Assignee: Motors Liquidation Co
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Filing: 1971-05-04
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Granted: 1973-04-03
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Expires: 1991-05-04
Abstract
Abstract An exhaust reactor for an internal combustion engine is preferably formed as a large volume manifold having a cast iron outer shell containing a baffled sheet metal inner liner with an intermediate insulating layer of core sand encapsulated between the walls of the inner liner and outer shell. The reactor is constructed by first fabricating the metal inner liner, then applying the insulating layer of core sand to the outer surfaces of the liner exclusive of certain protruding portions, casting the iron outer shell around the sand core and sheet metal liner so as to completely encapsulate the sand layer between the inner layer and outer shell.
Inventors
- 👤 E Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:03
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/30; F01N3/34; F01N3/26; F01N13/00; F01N13/08; F01N13/10; F02; F02B; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/20; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
122 words
An exhaust reactor for an internal combustion engine, said reactor comprising an inner passage defining liner of non-porous material capable of withstanding combustion temperatures, an intermediate layer of core sand insulating material formed around said inner liner and a unitary cast metal outer shell surrounding said inner liner and encapsulating said insulating material between said liner and said shell, said outer shell having inlet and outlet ports for exhaust gases to enter into the exit from said liner passage and means for connecting said inlet and outlet ports with such engine and an exhaust system respectively, said metal outer shell having sufficient thickness and strength to support said reactor in its operating environment and to resist impact damage during handling and operation.
Claim 2
Dependent Claim
122 words
An exhaust reactor for an internal combustion engine, said reactor comprising an inner passage defining liner of non-porous material capable of withstanding combustion temperatures, an intermediate layer of core sand insulating material formed around said inner liner and a unitary cast metal outer shell surrounding said inner liner and encapsulating said insulating material between said liner and said shell, said outer shell having inlet and outlet ports for exhaust gases to enter into the exit from said liner passage and means for connecting said inlet and outlet ports with such engine and an exhaust system respectively, said metal outer shell having sufficient thickness and strength to support said reactor in its operating environment and to resist impact damage during handling and operation.
Claim 3
Dependent Claim
26 words
The reactor of claim 1 wherein portions of said inner liner are mechanically interlocked with portions of said outer shell independently of said intermediate insulating layer.
Claim 4
Dependent Claim
35 words
The reactor of claim 1 wherein said inner liner defines an enlarged chamber and is provided with baffle means in said chamber to define an extended flow path for exhaust gases passing through said reactor.
Claim 5
Dependent Claim
100 words
An exhaust reactor manifold for an internal combustion engine, said manifold comprising an inner liner formed of high temperature resistant sheet metal and defining a gas flow passage with inlet and outlet openings, an intermediate insulating layer of core sand formed around the walls of said inner liner and a unitary cast iron shell surrounding said inner liner and encapsulating said core sand between said inner liner and said shell, said shell having inlet and outlet ports connecting with said inner liner openings and means at said ports for connecting said manifold with such engine and an exhaust system respectively.
Claim 6
Dependent Claim
100 words
An exhaust reactor manifold for an internal combustion engine, said manifold comprising an inner liner formed of high temperature resistant sheet metal and defining a gas flow passage with inlet and outlet openings, an intermediate insulating layer of core sand formed around the walls of said inner liner and a unitary cast iron shell surrounding said inner liner and encapsulating said core sand between said inner liner and said shell, said shell having inlet and outlet ports connecting with said inner liner openings and means at said ports for connecting said manifold with such engine and an exhaust system respectively.
Claim 7
Dependent Claim
14 words
The manifold of claim 4 wherein said inner liner is formed of stainless steel.
Claim 8
Independent Claim
87 words
The method of cOnstructing an insulated and lined exhaust reactor for use with an internal combustion engine, said method comprising the steps of fabricating an inner passage defining liner of non-porous material capable of withstanding combustion temperatures, forming around said inner liner an intermediate layer of sand insulating material capable of acting as a casting core, and casting a supporting and protecting outer shell around said intermediate layer and said inner liner so as to completely encapsulate said intermediate layer between said inner liner and said shell.
Claim 9
Independent Claim
87 words
The method of cOnstructing an insulated and lined exhaust reactor for use with an internal combustion engine, said method comprising the steps of fabricating an inner passage defining liner of non-porous material capable of withstanding combustion temperatures, forming around said inner liner an intermediate layer of sand insulating material capable of acting as a casting core, and casting a supporting and protecting outer shell around said intermediate layer and said inner liner so as to completely encapsulate said intermediate layer between said inner liner and said shell.
Claim 10
Independent Claim
119 words
The method of constructing an insulated and lined exhaust reactor for use with an internal combustion engine, said method comprising fabricating an inner passage defining liner of non-porous material capable of withstanding combustion temperatures, said liner having a plurality of protruding portions, forming an intermediate layer of sand insulating material, capable of acting as a casting core, around said inner liner while leaving said liner protruding portions exposed and casting a supporting and protecting outer shell around said intermediate layer and said inner liner so as to completely encapsulate said intermediate layer between said inner liner and said shell and to mechanically interlock said outer shell with said protruding portions of said inner liner independently of said intermediate layer.
Claim 11
Independent Claim
119 words
The method of constructing an insulated and lined exhaust reactor for use with an internal combustion engine, said method comprising fabricating an inner passage defining liner of non-porous material capable of withstanding combustion temperatures, said liner having a plurality of protruding portions, forming an intermediate layer of sand insulating material, capable of acting as a casting core, around said inner liner while leaving said liner protruding portions exposed and casting a supporting and protecting outer shell around said intermediate layer and said inner liner so as to completely encapsulate said intermediate layer between said inner liner and said shell and to mechanically interlock said outer shell with said protruding portions of said inner liner independently of said intermediate layer.
Claim 12
Independent Claim
135 words
The method of constructing an insulated and lined exhaust reactor manifold for use with an internal combustion engine, said method comprising the steps of fabricating an inner liner including baffles of high temperature resistant sheet metal to define an enlarged chamber with an extended gas flow path therethrough, said fabricating step including providing said inner liner with a plurality of protruding portions, forming an intermediate layer of core sand around the exterior of said inner liner except for said protruding portions, and casting a supporting and protecting iron outer shell around said sand layer and said sheet metal liner so as to completely encapsulate said sand layer between said sheet metal liner and said cast iron shell and to mechanically interlock said liner protruding portions with said cast iron shell independently of said sand layer.
Claim 13
Independent Claim
135 words
The method of constructing an insulated and lined exhaust reactor manifold for use with an internal combustion engine, said method comprising the steps of fabricating an inner liner including baffles of high temperature resistant sheet metal to define an enlarged chamber with an extended gas flow path therethrough, said fabricating step including providing said inner liner with a plurality of protruding portions, forming an intermediate layer of core sand around the exterior of said inner liner except for said protruding portions, and casting a supporting and protecting iron outer shell around said sand layer and said sheet metal liner so as to completely encapsulate said sand layer between said sheet metal liner and said cast iron shell and to mechanically interlock said liner protruding portions with said cast iron shell independently of said sand layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |