Patent US3776366A successfully refreshed from Google Patents.
US3776366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust muffler
Assignee: Outboard Marine Corp
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Filing: 1972-07-24
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Granted: 1973-12-04
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Expires: 1992-07-24
Abstract
Abstract Disclosed herein is a muffler comprising an elongated housing including a generally cylindrical side wall and, at each end thereof, an inwardly concavely dished end wall, and a dished partition dividing the housing into an inlet chamber and an outlet chamber and extending convexly with respect to the inlet chamber, together with a beveled port which is located in the partition, which extends from the inlet chamber into the outlet chamber and which includes a tubular part having a length extending parallel to the length of the housing and being formed, at least in part, by the material of the partition with an inlet having a margin which merges with the partition and which has an arcuate form in a plane extending radially of the length of the tubular part, and an outlet tube including an inlet portion extending lengthwise within the housing through the partition and having an inlet in the outlet chamber and including an outlet portion extending at least partially in the inlet chamber and outwardly through said side wall.
Inventors
- 👤 E Betts
- 👤 D Hanson
- 👤 D Stephenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:05
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/02; F01N1/08; F01N2470/00; F01N2470/14; F01N2470/18; F01N2490/00; F01N2490/15; F01N2490/155; F02; F02B; F02B61/00; F02B61/04; F02B61/045
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
114 words
A muffler comprising an elongated housing having an elongated outer wall and including a partition dividing said housing into an inlet chamber and an outlet chamber, said partition including a port communicating between said inlet chamber and said outlet chamber, an inlet tube extending through said elongated outer wall and communicating with said inlet chamber, and a discharge tube including an inlet portion extending lengthwise of said housing through said partition and having an inlet in said outlet chamber, said inlet portion being imperforate in said inlet chamber, and an imperforate outlet portion communicating with said inlet portion and extending at least partially in said inlet chamber and outwardly through said elongAted outer wall.
Claim 2
Dependent Claim
114 words
A muffler comprising an elongated housing having an elongated outer wall and including a partition dividing said housing into an inlet chamber and an outlet chamber, said partition including a port communicating between said inlet chamber and said outlet chamber, an inlet tube extending through said elongated outer wall and communicating with said inlet chamber, and a discharge tube including an inlet portion extending lengthwise of said housing through said partition and having an inlet in said outlet chamber, said inlet portion being imperforate in said inlet chamber, and an imperforate outlet portion communicating with said inlet portion and extending at least partially in said inlet chamber and outwardly through said elongAted outer wall.
Claim 3
Dependent Claim
65 words
A muffler in accordance with claim 1 wherein said discharge tube has a relatively long length in said housing and a relatively small cross sectional area as compared with said length, the ratio of said cross section area to said length in said housing of said discharge tube being between 0.25 and 0.073 with said length in inches divided into said area in square inches.
Claim 4
Dependent Claim
31 words
An exhaust muffler in accordance with claim 1 including a perforated deflector mounted in said inlet chamber in the path of exhaust gas entering said inlet chamber from said inlet tube.
Claim 5
Dependent Claim
17 words
An exhaust muffler in accordance with claim 3 wherein said deflector is supported on said discharge tube.
Claim 6
Dependent Claim
26 words
An exhaust muffler in accordance with claim 1 and further including a second discharge tube extending in generally parallel relation to said first mentioned discharge tube.
Claim 7
Dependent Claim
75 words
A muffler in accordance with claim 1 including a second port located in said partition and angularly spaced from said first mentioned port, said first mentioned port and said second port each extending from said inlet chamber into said outlet chamber and each including a tubular part with an inlet having a margin which merges with said partition and has an arcuate form in a plane extending radially of the length of said tubular part.
Claim 8
Dependent Claim
53 words
A muffler in accordance with claim 6 wherein said tubular parts of said ports are formed, at least in part, from the material of said partition and have a length extending parallel to the length of said housing, and an outlet located in a plane perpendicular to the length of said tubular parts.
Claim 9
Dependent Claim
165 words
A muffler comprising an elongated housing having an elongated outer wall and including a first partition dividing said housing into an inlet chamber and an outlet chamber, said first partition including therein a port communicating between said inlet and outlet chambers, a second partition spaced from said first-mentioned partition and dividing said outlet chamber into an intermediate sub-chamber located adjacent to said first partition, and an outlet sub-chamber, said second partition including therein a port communicating between said intermediate and outlet sub-chambers, an inlet tube extending through said outer wall and communicating with said inlet chamber, and a discharge tube including an inlet portion communication with said outlet sub-chamber and extending lengthwise of said housing through said first and second partitions, said inlet portion being imperforate in said inlet chamber and in said intermediate sub-chamber, said discharge tube also including an imperforate outlet portion communicating with said inlet portion and extending at least partially in said inlet chamber and outwardly through said elongated outer wall.
Claim 10
Dependent Claim
165 words
A muffler comprising an elongated housing having an elongated outer wall and including a first partition dividing said housing into an inlet chamber and an outlet chamber, said first partition including therein a port communicating between said inlet and outlet chambers, a second partition spaced from said first-mentioned partition and dividing said outlet chamber into an intermediate sub-chamber located adjacent to said first partition, and an outlet sub-chamber, said second partition including therein a port communicating between said intermediate and outlet sub-chambers, an inlet tube extending through said outer wall and communicating with said inlet chamber, and a discharge tube including an inlet portion communication with said outlet sub-chamber and extending lengthwise of said housing through said first and second partitions, said inlet portion being imperforate in said inlet chamber and in said intermediate sub-chamber, said discharge tube also including an imperforate outlet portion communicating with said inlet portion and extending at least partially in said inlet chamber and outwardly through said elongated outer wall.
Claim 11
Dependent Claim
25 words
An exhaust muffler in accordance with claim 8 and further including a second discharge tube extending in parallel relation to said first mentioned discharge tube.
Claim 12
Dependent Claim
31 words
An exhaust muffler in accordance with claim 9 including a perforated deflector mounted in said inlet chamber in the path of exhaust gas entering said inlet chamber from said inlet tube.
Claim 13
Dependent Claim
19 words
An exhaust muffler in accordance with claim 10 wherein said deflector is supported on one of said discharge tubes.
Claim 14
Dependent Claim
53 words
A muffler in accordance with claim 11 wherein said ports are formed, at least in part, from the material of the associated one of said partitions and have a length extending parallel to the length of said housing, and an outlet located in a plane perpendicular to the length of said tubular parts.
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |