Patent US3703938A successfully refreshed from Google Patents.
US3703938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust muffler
Assignee: Nelson Muffler Corp
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Filing: 1971-04-06
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Granted: 1972-11-28
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Expires: 1991-04-06
Abstract
Abstract The present invention relates generally to improvements in mufflers, or silencers for internal combustion engines. The muffler device disclosed herein comprises an improved, compact and very unique expansion chamber for receiving exhaust gases directly from an internal combustion engine. This chamber accommodates a tube-like structure which is so disposed that gases initially received by the chamber are first directed against the periphery of the tube-like structure and then into a progressively increasing expansion area surrounding said tube structure.
Inventors
- 👤 Ralph H Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:14
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/04; F01N1/00; F01N1/08; F01N1/084
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
137 words
An exhaust muffler for internal combustion engines and the like including a housing providing a chamber for receiving exhaust gases, inlet means for directing exhaust gases into said chamber, a tube-like section positioned within said chamber having a substantially imperforate external peripheral surface which, in cooperation with the adjacent inner peripheral surface of said housing, presents a circuitous exhaust gas expansion area surrounding said tube-like section of progressively increasing size, said inlet means positioned so as to direct exhaust gases against the external periphery of said tube-like section, and outlet means for directing exhaust gases from said housing, said tube-like section having opposite open extremities, one for receiving exhaust gases from said circuitous area and the other open extremity for directing gases passing through said tube-like section to an area in the vicinity of said outlet means.
Claim 2
Dependent Claim
137 words
An exhaust muffler for internal combustion engines and the like including a housing providing a chamber for receiving exhaust gases, inlet means for directing exhaust gases into said chamber, a tube-like section positioned within said chamber having a substantially imperforate external peripheral surface which, in cooperation with the adjacent inner peripheral surface of said housing, presents a circuitous exhaust gas expansion area surrounding said tube-like section of progressively increasing size, said inlet means positioned so as to direct exhaust gases against the external periphery of said tube-like section, and outlet means for directing exhaust gases from said housing, said tube-like section having opposite open extremities, one for receiving exhaust gases from said circuitous area and the other open extremity for directing gases passing through said tube-like section to an area in the vicinity of said outlet means.
Claim 3
Dependent Claim
40 words
An exhaust muffler for internal combustion engines and the like as set forth in claim 1, wherein the cross sectional shape of the tube-like section conforms substantially with the cross sectional shape of the housing in which it is positioned.
Claim 4
Dependent Claim
24 words
An exhaust muffler for internal combustion engines and the like as set forth in claim 1, wherein said housing is substantially cylindrical in shape.
Claim 5
Dependent Claim
29 words
An exhaust muffler for internal combustion engines and the like as set forth in claim 1, wherein the tube-like section positioned within the chamber is substantially cylindrical in shape.
Claim 6
Dependent Claim
27 words
An exhaust muffler for internal combustion engines and the like as set forth in claim 1, wherein said said housing is substantially oval in cross sectional shape.
Claim 7
Dependent Claim
31 words
An exhaust muffler for internal combustion engines and the like as set forth in claim 5, wherein said tube-like section positioned within said chamber is substantially cylindrical in cross sectional shape.
Claim 8
Dependent Claim
38 words
An exhaust muffler for internal combustion engines and the like as set forth in claim 1, wherein the longitudinal axis of said tube-like section is substantiallY parallel and eccentrically disposed with respect to the axis of said housing.
Claim 9
Dependent Claim
106 words
An exhaust muffler for internal combustion engines and the like including a housing providing adjacently positioned chambers for receiving exhaust gases, inlet means for directing exhaust gases into one of said chambers, inlet means for directing exhaust gases into the other chamber, a tube-like section positioned within each of said chambers, each of said tube-like sections having an external peripheral surface which in cooperation with the adjacent complementary inner peripheral surface of said housing present circuitous exhaust gas expansion areas of progressively increasing size, each of said areas communicating with one of said inlet means, and common outlet means communicating with said circuitous gas expansion areas.
Claim 10
Dependent Claim
106 words
An exhaust muffler for internal combustion engines and the like including a housing providing adjacently positioned chambers for receiving exhaust gases, inlet means for directing exhaust gases into one of said chambers, inlet means for directing exhaust gases into the other chamber, a tube-like section positioned within each of said chambers, each of said tube-like sections having an external peripheral surface which in cooperation with the adjacent complementary inner peripheral surface of said housing present circuitous exhaust gas expansion areas of progressively increasing size, each of said areas communicating with one of said inlet means, and common outlet means communicating with said circuitous gas expansion areas.
Claim 11
Dependent Claim
28 words
An exhaust muffler for internal combustion engines and the like as set forth in claim 8 wherein said common outlet means is interposed between said adjacently positioned chambers.
Claim 12
Dependent Claim
26 words
An exhaust muffler for internal combustion engines and the like as set forth in claim 8 wherein said common outlet means includes a perforated tube-like section.
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |