US3581494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas manifold
Assignee: Meritor Inc
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Filing: 1970-01-02
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Granted: 1971-06-01
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Expires: 1990-01-02
Abstract
Abstract An exhaust gas manifold for an internal combustion engine in which there is provided an outer shell having a plurality of port runners for connection to said engine and an outlet for connection to an exhaust pipe. An inner shell is carried within the outer shell to receive the exhaust gases from the engine and increase their dwell time by providing adequate volume for oxidation to occur within the manifold prior to permitting said gases to discharge through the outer shell outlet. Said inner shell is formed from sheet metal and comprises a plurality of slidably interconnected chambers in open communication with each other and the outlet. Each of said chambers is provided with an inlet conduit carried within one of the port runners and disposed in sealing engagement therewith. A compressible insulation is interposed between said outer and inner shells for thermally insulating said outer shell from the exhaust gases passing through said inner shell, and for conserving the thermal energy of the exhaust gases.
Inventors
- 👤 George E Scheitlin
- 👤 Frank L Zagar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:43
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N13/102; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
117 words
An exhaust manifold for an internal combustion engine, comprising an outer shell having an outwardly projecting outlet, a plurality of outwardly projecting port runners fixedly connected to said outer shell and adapted to be fixedly connected to said engine, and inner shell comprising a plurality of aligned chambers carried in said outer shell, each of said chambers being slidably interconnected to the next adjacent chamber and in open communication with each other, one of said chambers having an outwardly projecting outlet carried in the outer shell outlet and slidable with respect to said outer shell outlet, and a plurality of inlet conduits carried in said port runners and operatively connected to said chambers in open communication therewith.
Claim 2
Dependent Claim
117 words
An exhaust manifold for an internal combustion engine, comprising an outer shell having an outwardly projecting outlet, a plurality of outwardly projecting port runners fixedly connected to said outer shell and adapted to be fixedly connected to said engine, and inner shell comprising a plurality of aligned chambers carried in said outer shell, each of said chambers being slidably interconnected to the next adjacent chamber and in open communication with each other, one of said chambers having an outwardly projecting outlet carried in the outer shell outlet and slidable with respect to said outer shell outlet, and a plurality of inlet conduits carried in said port runners and operatively connected to said chambers in open communication therewith.
Claim 3
Dependent Claim
46 words
The invention as set forth in claim 1 in which said chambers are spaced from the inner face of the outer shell and said inlet conduits are in sealing engagement with said port runners, and an insulating barrier is interposed between said inner and outer shells.
Claim 4
Dependent Claim
131 words
An exhaust gas manifold for an internal combustion engine, comprising an outer shell having an outlet, a plurality of port runners fixedly connected to said outer shell and adapted to be fixedly connected to said engine, an inner shell carried in said outer shell comprising aligned first and second end chambers and at least one intermediate chamber, each chamber having a sidewall and a pair of end walls, an outwardly projecting nipple fixedly mounted on said chambers, said first and intermediate chambers having openings formed therein for slidably receiving the nipple on the next adjacent chamber, the nipple on said first chamber being slidably carried in the outer shell outlet, and a plurality of inlet conduits carried in said port runners and operatively connected to said chambers in open communication therewith.
Claim 5
Dependent Claim
131 words
An exhaust gas manifold for an internal combustion engine, comprising an outer shell having an outlet, a plurality of port runners fixedly connected to said outer shell and adapted to be fixedly connected to said engine, an inner shell carried in said outer shell comprising aligned first and second end chambers and at least one intermediate chamber, each chamber having a sidewall and a pair of end walls, an outwardly projecting nipple fixedly mounted on said chambers, said first and intermediate chambers having openings formed therein for slidably receiving the nipple on the next adjacent chamber, the nipple on said first chamber being slidably carried in the outer shell outlet, and a plurality of inlet conduits carried in said port runners and operatively connected to said chambers in open communication therewith.
Claim 6
Dependent Claim
15 words
The invention as set forth in claim 3 in which said end walls are convex.
Claim 7
Dependent Claim
60 words
The invention as set forth in claim 3 in whiCh said chambers are spaced from the inner face of the outer shell, the end walls on adjacent chambers are spaced from each other, the inlet conduits are in sealing engagement with the port runners, and an insulating barrier is interposed between adjacent chambers and between said chambers and outer shell.
Claim 8
Dependent Claim
46 words
The invention as set forth in claim 3 in which said chambers are formed from sheet metal with said end walls and inlet conduits being bindingly connected to the chamber sidewalls and said nipples being bindingly connected to one of said end walls on said chambers.
Claim 9
Dependent Claim
31 words
The invention as set forth in claim 1 in which said chambers are formed from sheet metal and the outer end walls of the outermost ones of said chambers are convex.
Claim 10
Dependent Claim
93 words
The invention as set forth in claim 1 in which said inner and outer shells are formed from sheet metal and said outer shell comprises a casing, a pair of end caps are connected to the ends of said casing with one of said end caps having an opening formed therein, an outlet conduit is connected to said one end cap at said opening, said casing having a plurality of openings formed therein, and a plurality of conduits are connected to said casing at said plurality of openings to form said port runners.
Claim 11
Dependent Claim
66 words
The invention as set forth in claim 1 in which said chambers are formed from sheet metal and said outer shell is formed from a metal casting, said casting having a plurality of ducts projecting outwardly therefrom to form said port runners, and insulating barrier is interposed between said inner and outer shells, and said inlet conduits are carried in said ducts in sealing engagement therewith.
Claim 12
Dependent Claim
109 words
An exhaust manifold for an internal combustion engine, comprising an outer shell having an outwardly projecting outlet and a plurality of outwardly projecting inlets, and inner shell carried within said outer shell and having an outwardly projecting outlet carried in and slidable with respect to said outer shell outlet and having a plurality of outwardly projecting inlets carried within said outer shell inlets, said inner shell being spaced from said outer shell throughout substantially their entire extents whereby said inner shell is expandable and contractable with respect to said outer shell, and means in said inner shell for disrupting the flow of gas from its inlets to its outlet.
Claim 13
Dependent Claim
109 words
An exhaust manifold for an internal combustion engine, comprising an outer shell having an outwardly projecting outlet and a plurality of outwardly projecting inlets, and inner shell carried within said outer shell and having an outwardly projecting outlet carried in and slidable with respect to said outer shell outlet and having a plurality of outwardly projecting inlets carried within said outer shell inlets, said inner shell being spaced from said outer shell throughout substantially their entire extents whereby said inner shell is expandable and contractable with respect to said outer shell, and means in said inner shell for disrupting the flow of gas from its inlets to its outlet.
Claim 14
Dependent Claim
36 words
The invention as set forth in claim 10 in which said means for disrupting the flow of gas are disposed along said inner shell on opposite sides of each of said inlets in said inner shell.
Claim 15
Dependent Claim
48 words
The invention as set forth in claim 10 in which said inlets on said inner and outer shells are in sealing engagement with each other at their ends remote from said shells, and a layer of insulation is interposed between said inner and outer shells including their inlets.
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |