US3960509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic muffler
Assignee: Individual
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Filing: 1974-12-30
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Granted: 1976-06-01
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Expires: 1994-12-30
Abstract
Abstract A catalytic muffler is described with reference to three preferred embodiments. In the first embodiment, a cylindrical entry tube having peripheral holes passes into the interior of the muffler, a second cylindrical tube having peripheral holes offset from the peripheral holes in the entry tube surrounds the entry tube, a cartridge containing a catalytic converter surrounds the second tube, and an exit tube leads from a point in the interior of the muffler external to the cartridge to the exterior of the muffler. In the second embodiment, the entry tube is branched within the muffler, and each branch is surrounded by a cartridge containing a catalytic converter. In the third embodiment, the entry tube, the second tube, and the cartridge all have cross-sections in the shapes of racetracks the major and minor axes of which are coincident. In all three embodiments, the cartridge is filled with asbestos fibers impregnated first with sodium and then with copper sulfate.
Inventors
- 👤 Raymond R. Abriany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:14
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/285; F01N1/00; F01N1/08; F01N13/00; F01N13/011; F01N13/017; F01N3/2882; F01N3/2885; F01N1/02; F01N2230/00; F01N2230/04; F01N2330/00; F01N2330/10; F01N2450/00; F01N2450/30; F01N2490/00; F01N2490/15; F01N2490/155; Y; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
533 words
A catalytic muffler comprising: a. muffler walls defining an inner volume which is gas-tight except for entry and exit tubes recited hereinafter; b. an entry tube which passes from the outside of the muffler walls into the inner volume defined by said muffler walls, said entry tube having a plurality of holes in the longitudinal wall thereof in the portion of said entry tube within the inner volume defined by said muffler walls; c. a second tube at least a portion of which surrounds at least a portion of the portion of said entry tube within the inner volume defined by said muffler walls, said second tube likewise having a plurality of holes in the longitudinal wall thereof in the portion of said second tube surrounding said entry tube, the holes in said second tube being adjacent to but offset from the holes in said entry tube, whereby the combustion gasses passing through the muffler are required to follow circuitous paths in a first volume between said entry tube and said second tube; d. a cartridge containing a catalytic converter surrounding at least the portion of said second tube which has holes in the longitudinal wall thereof; and e. an exit tube which passes from the outside of the muffler walls into the inner volume defined by said muffler walls and which opens into that inner volume at a point on the side of said cartridge remote from said second tube; said entry tube, said second tube, and said cartridge all extend into the muffler at least approximately the same distance, and f. a first partition i. extending transversely of the muffler at the inner ends of said entry tube, said second tube; and said cartridge, ii. butting against the inner ends of said entry tube, said second tube, and said cartridge, and iii. having at least three holes therethrough radially outside said cartridge; g. a second partition i. extending transversely of the muffler between said first partition and the point where said entry tube passes through said muffler walls, ii. engaging the inside of said muffler walls, the outside of said entry tube, and the outer end of said second tube, and iii. having at least two holes therethrough radially outside said cartridge; and h. a third tube which extends from a hole in said first partition to a hole in said second partition, and wherein said exit tube extends from a hole in said second partition, through a hole in said first partition, and through said muffler walls at a point on the side of said first partition remote from said second partition, whereby the combustion gasses passing through the muffler pass through the holes in said entry tube into the first volume, then through said second tube and said cartridge into a second volume defined by said muffler walls, the outer surface of said cartridge, and said first and second partition, then through one or more holes in said first partion into a third volume defined at least in part by said muffler walls and said first partition, then through said third tube into a fourth volume defined at least in part by said muffler walls and said second partition,
Claim 2
Dependent Claim
533 words
A catalytic muffler comprising: a. muffler walls defining an inner volume which is gas-tight except for entry and exit tubes recited hereinafter; b. an entry tube which passes from the outside of the muffler walls into the inner volume defined by said muffler walls, said entry tube having a plurality of holes in the longitudinal wall thereof in the portion of said entry tube within the inner volume defined by said muffler walls; c. a second tube at least a portion of which surrounds at least a portion of the portion of said entry tube within the inner volume defined by said muffler walls, said second tube likewise having a plurality of holes in the longitudinal wall thereof in the portion of said second tube surrounding said entry tube, the holes in said second tube being adjacent to but offset from the holes in said entry tube, whereby the combustion gasses passing through the muffler are required to follow circuitous paths in a first volume between said entry tube and said second tube; d. a cartridge containing a catalytic converter surrounding at least the portion of said second tube which has holes in the longitudinal wall thereof; and e. an exit tube which passes from the outside of the muffler walls into the inner volume defined by said muffler walls and which opens into that inner volume at a point on the side of said cartridge remote from said second tube; said entry tube, said second tube, and said cartridge all extend into the muffler at least approximately the same distance, and f. a first partition i. extending transversely of the muffler at the inner ends of said entry tube, said second tube; and said cartridge, ii. butting against the inner ends of said entry tube, said second tube, and said cartridge, and iii. having at least three holes therethrough radially outside said cartridge; g. a second partition i. extending transversely of the muffler between said first partition and the point where said entry tube passes through said muffler walls, ii. engaging the inside of said muffler walls, the outside of said entry tube, and the outer end of said second tube, and iii. having at least two holes therethrough radially outside said cartridge; and h. a third tube which extends from a hole in said first partition to a hole in said second partition, and wherein said exit tube extends from a hole in said second partition, through a hole in said first partition, and through said muffler walls at a point on the side of said first partition remote from said second partition, whereby the combustion gasses passing through the muffler pass through the holes in said entry tube into the first volume, then through said second tube and said cartridge into a second volume defined by said muffler walls, the outer surface of said cartridge, and said first and second partition, then through one or more holes in said first partion into a third volume defined at least in part by said muffler walls and said first partition, then through said third tube into a fourth volume defined at least in part by said muffler walls and said second partition,
Claim 3
Dependent Claim
144 words
A catalytic muffler as recited in claim 1 wherein said cartridge comprises: a. cartridge walls defining an inner volume, at least one of said cartridge walls being permeable to combustion gases and being adapted to surround said second tube so that combustion gases will pass through said at least one of said cartridge walls into the inner volume defined by said cartridge walls and at least another of said cartridge walls also being permeable to combustion gases and being adapted to permit egress of combustion gases which have passed through said at least one of said cartridge walls and through the inner volume defined by said cartridge walls and b. asbestos fibers impregnated first with sodium and then with copper sulfate and packed into the inner volume defined by said cartridge walls sufficiently tightly to leave no void, but loosely enough to allow the
Claim 4
Dependent Claim
25 words
A catalytic muffler as recited in claim 2 wherein said entry tube, said second tube, and said cartridge are all cylindrical and are at least
Claim 5
Dependent Claim
33 words
A catalytic muffler as recited in claim 2 wherein said entry tube branches into two tubes, each surrounded longitudinally by a cartridge containing a catalytic converter, within the inner volume defined by said
Claim 6
Dependent Claim
25 words
A catalytic muffler as recited in claim 2 wherein said entry tube, said second tube, and said cartridge all have cross-sections in the shape of
Claim 7
Dependent Claim
25 words
A catalytic muffler as recited in claim 1 wherein said entry tube, said second tube, and said cartridge are all cylindrical and are at least
Claim 8
Dependent Claim
33 words
A catalytic muffler as recited in claim 1 wherein said entry tube branches into two tubes, each surrounded longitudinally by a cartridge containing a catalytic converter, within the inner volume defined by said
Claim 9
Dependent Claim
25 words
A catalytic muffler as recited in claim 1 wherein said entry tube, said second tube, and said cartridge all have cross-sections in the shape of
Claim 10
Dependent Claim
161 words
A catalytic muffler as recited in claim 1 and further compising: a. a third partition i. extending transversely of the muffler between said first partition and said muffler walls and ii. having at least two holes therethrough and b. a fourth partition i. extending transversely of the muffler between said second partition and said muffler walls and ii. having at least two holes therethrough and wherein i. said exit tube passes through a hole in said third partion and ii. said entry tube passes through a hole in said fourth partion, whereby at least some of the combustion gasses passing through the muffler pass from the second volume into a fifth volume defined by said muffler walls, said third partition, and the outer wall of said exit tube and at least some of the combustion gasses pass from the fourth volume into a sixth volume defined by said muffler walls, said fourth partition, and the outer wall of said entry tube.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |