US3729937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust reactor and method of making
Assignee: Motors Liquidation Co
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Filing: 1971-12-17
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Granted: 1973-05-01
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Expires: 1991-12-17
Abstract
Abstract In preferred embodiments, exhaust reactors for internal combustion engines are formed as large volume manifolds having cast iron outer shells containing baffled sheet metal inner liners spacedly supported within their respective outer shells to provide an insulating air space between the walls of the inner liner and outer shell. Means for providing a flow of air through the insulating space may be provided with the preheated air being delivered through means, internal or external of the manifolds, to the incoming exhaust gas stream for mixture therewith to aid combustion of the exhaust products. Construction of such reactors includes the steps of fabricating a metal inner liner, forming a sand core along the outer surfaces of the liner exclusive of certain supporting portions, casting a metal outer shell around the sand core and sheet metal liner so as to provide a protecting and supporting housing, and removing the core sand from the insulating space, preferably by shaking it out through openings formed in the outer shell.
Inventors
- 👤 M Haddad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:24
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/30; F01N3/34; F01N3/26; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 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, a unitary cast outer shell surrounding said inner liner and interlockingly supporting said liner at predetermined locations thereof, the remainder of said liner being spaced inwardly of said shell to define therewith an insulating space, said outer shell having inlet and outlet ports for exhaust gases to enter into and exit from said liner passage and means for connecting said inlet and outlet ports with such engine and an exhaust system respectively and means provided in at least one of said inner liner and outer shell members to allow for the removal of casting core material from said insulating space during manufacture of said reactor.
Claim 2
Dependent Claim
129 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, a unitary cast outer shell surrounding said inner liner and interlockingly supporting said liner at predetermined locations thereof, the remainder of said liner being spaced inwardly of said shell to define therewith an insulating space, said outer shell having inlet and outlet ports for exhaust gases to enter into and exit from said liner passage and means for connecting said inlet and outlet ports with such engine and an exhaust system respectively and means provided in at least one of said inner liner and outer shell members to allow for the removal of casting core material from said insulating space during manufacture of said reactor.
Claim 3
Dependent Claim
181 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, a unitary cast iron outer shell surrounding said inner liner and interlockingly supporting said liner at predetermined locations theReof, the remainder of said liner being spaced inwardly of said shell to define therewith an insulating space, said outer shell having inlet and outlet ports connecting with said liner openings and means at said ports for connecting said manifold with such engine and an exhaust system, respectively and air opening means through at least one of said outer shell and inner liner to provide for the inlet of cooling air into said insulating air space and the transfer of preheated air from said insulating air space for delivery into said liner-defined passage for combustion with the exhaust gases of such engine, at least certain of said air opening means being arranged to also permit removal therethrough of casting core material from said insulating space during manufacture of said manifold.
Claim 4
Dependent Claim
181 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, a unitary cast iron outer shell surrounding said inner liner and interlockingly supporting said liner at predetermined locations theReof, the remainder of said liner being spaced inwardly of said shell to define therewith an insulating space, said outer shell having inlet and outlet ports connecting with said liner openings and means at said ports for connecting said manifold with such engine and an exhaust system, respectively and air opening means through at least one of said outer shell and inner liner to provide for the inlet of cooling air into said insulating air space and the transfer of preheated air from said insulating air space for delivery into said liner-defined passage for combustion with the exhaust gases of such engine, at least certain of said air opening means being arranged to also permit removal therethrough of casting core material from said insulating space during manufacture of said manifold.
Claim 5
Independent Claim
128 words
The method of constructing an insulated 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 material capable of acting as a casting core, portions of said inner liner being left uncovered by said intermediate layer, casting a supporting and protecting outer shell around said intermediate layer and said inner liner, with said outer shell engaging said uncovered portions of said inner liner to support the other portions of said liner in spaced relationship with said cast outer shell independently of said intermediate layer, and removing said intermediate layer of core material from between said inner liner and outer shell.
Claim 6
Independent Claim
128 words
The method of constructing an insulated 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 material capable of acting as a casting core, portions of said inner liner being left uncovered by said intermediate layer, casting a supporting and protecting outer shell around said intermediate layer and said inner liner, with said outer shell engaging said uncovered portions of said inner liner to support the other portions of said liner in spaced relationship with said cast outer shell independently of said intermediate layer, and removing said intermediate layer of core material from between said inner liner and outer shell.
Claim 7
Independent Claim
139 words
The method of constructing an air insulated exhaust reactor for use with an internal combustion engine, said method comprising the steps of fabricating an inner passage defining liner of high temperature resistant sheet metal, said liner having a plurality of protruding portions, forming an intermediate layer of adherent core sand around said inner liner except for said protruding portions, casting a supporting and protecting iron outer shell around said sand layer and said sheet metal liner, said outer shell being mechanically interlocked with said liner protruding portions to support said liner in spaced relationship with the other portions of said liner independently of said sand layer, forming shake-out openings in said outer shell to provide for removal of said core sand layer, removing said sand layer from between the inner liner and outer shell, and plugging said shake-out openings.
Claim 8
Independent Claim
139 words
The method of constructing an air insulated exhaust reactor for use with an internal combustion engine, said method comprising the steps of fabricating an inner passage defining liner of high temperature resistant sheet metal, said liner having a plurality of protruding portions, forming an intermediate layer of adherent core sand around said inner liner except for said protruding portions, casting a supporting and protecting iron outer shell around said sand layer and said sheet metal liner, said outer shell being mechanically interlocked with said liner protruding portions to support said liner in spaced relationship with the other portions of said liner independently of said sand layer, forming shake-out openings in said outer shell to provide for removal of said core sand layer, removing said sand layer from between the inner liner and outer shell, and plugging said shake-out openings.
References Cited (Backward Citations)
US3568723A
Cited
US3635031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |