US3709320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust means for multiple cylinder internal combustion engine
Assignee: MEINEL GEORGADEL O METALLWAREN
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Filing: 1971-10-12
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Granted: 1973-01-09
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Expires: 1991-10-12
Abstract
Abstract The exhaust device for multiple cylinder internal combustion engines of the type where the waste gas pipes lead separately from cylinder to the exhaust sound muffler, the lengths of which is of different magnitude between motor and sound muffler, while individual waste gas pipes inside the sound muffler are prolonged by a certain amount, is characterized in that the waste gas pipes which are prolonged inside the sound muffler have at least one enlargement in their cross-section.
Inventors
- 👤 A Hollerl
- 👤 K Landgraf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:31
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N1/00; F01N1/08; F02; F02N; F02N7/00; F02N7/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
Exhaust device for multiple cylinder internal combustion engines comprising a housing defining an exhaust sound muffler and waste gas pipes, of the type having a waste gas pipe for each cylinder of the associated engine, said pipes leading separately to the exhaust sound muffler, the lengths of said pipes between the motor and said muffler being different, while individual waste gas pipes are prolonged by a certain amount inside said muffler, and said waste gas pipes inside said muffler having expanded cross-sections.
Claim 2
Dependent Claim
82 words
Exhaust device for multiple cylinder internal combustion engines comprising a housing defining an exhaust sound muffler and waste gas pipes, of the type having a waste gas pipe for each cylinder of the associated engine, said pipes leading separately to the exhaust sound muffler, the lengths of said pipes between the motor and said muffler being different, while individual waste gas pipes are prolonged by a certain amount inside said muffler, and said waste gas pipes inside said muffler having expanded cross-sections.
Claim 3
Dependent Claim
17 words
Exhaust device in accordance with claim 1, where said expanded cross-sections are in the form of bulges.
Claim 4
Dependent Claim
50 words
Exhaust device in accordance with claim 1, comprising two prolonged waste gas pipes extending within said muffler in opposite directions relative to the longitudinal axis of said muffler, and where saId bulges extend longitudinally relative to the longitudinal axis of said muffler and in opposite directions relative to each other.
Claim 5
Dependent Claim
19 words
Exhaust device in accordance with claim 3, where said bulges have equal shapes and are of the same volume.
Claim 6
Dependent Claim
23 words
Exhaust device in accordance with claim 4 where apertures are defined in said bulges at the ends remote from said waste gas pipes.
Claim 7
Dependent Claim
38 words
Exhaust device in accordance with claim 5, where said parts of said pipes having said expanded sections are defined by sheet metal having flat sides disposed upon and connected with one another and having recesses defining said bulges.
Claim 8
Dependent Claim
29 words
Exhaust device in accordance with claim 6, where portions of said parts of sheet metal away from said bulges are provided with apertures for the passage of waste gases.
Claim 9
Dependent Claim
13 words
Exhaust device in accordance with claim 7 where said bulges present flat sides.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |