Patent US2373733A successfully refreshed from Google Patents.
US4022291A
Expired / Lapsed
US
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Exhaust muffler having an attenuater can assembly
Assignee: Outboard Marine Corp
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Filing: 1975-11-21
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Granted: 1977-05-10
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Expires: 1995-11-21
Abstract
Abstract Disclosed herein is a muffler comprising an elongated tubular housing having an outer wall partially defining a chamber, an inlet pipe extending through the tubular housing for communication with the chamber, and an attenuater can assembly secured to the tubular housing and including an attenuater can having a first end wall, a second end wall, and a perforated cylindrical sidewall extending between the end walls and located within the chamber, which assembly also includes an outlet pipe extending exteriorly of the housing from within the attenuater can through the first end wall for communication with the environment outside the tubular housing.
Inventors
- 👤 Donald K. Stephenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:35
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/14; F01N1/00; F01N1/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
A muffler comprising an elongated tubular housing having an elongated axis and an outer wall extending parallel to said axis and partially defining a chamber, an inlet pipe extending radially with respect to said axis and through said outer wall for communication with said chamber and a plurality of attenuater can assemblies extending in parallel relation to each other and each including an attenuater can having a first end wall secured to and coincident with said outer wall, a second end wall and a cylindrical sidewall extending between said end walls and located within said chamber and extending generally perpendicularly to said outer wall of said tubular housing, said cylindrical sidewall having perforations within said chamber adjacent said first end wall, each said assembly also including an outlet pipe having an inlet located within said attenuater can adjacent said second end wall, said outlet pipe extending radially with respect to said axis and through said first end wall and through and beyond said outer wall for communication with the environment outside said tubular housing.
Claim 2
Dependent Claim
174 words
A muffler comprising an elongated tubular housing having an elongated axis and an outer wall extending parallel to said axis and partially defining a chamber, an inlet pipe extending radially with respect to said axis and through said outer wall for communication with said chamber and a plurality of attenuater can assemblies extending in parallel relation to each other and each including an attenuater can having a first end wall secured to and coincident with said outer wall, a second end wall and a cylindrical sidewall extending between said end walls and located within said chamber and extending generally perpendicularly to said outer wall of said tubular housing, said cylindrical sidewall having perforations within said chamber adjacent said first end wall, each said assembly also including an outlet pipe having an inlet located within said attenuater can adjacent said second end wall, said outlet pipe extending radially with respect to said axis and through said first end wall and through and beyond said outer wall for communication with the environment outside said tubular housing.
Claim 3
Dependent Claim
22 words
A muffler in accordance with claim 1 wherein said inlet pipe extends through said outer wall generally perpendicularly to said outlet pipe.
Claim 4
Dependent Claim
12 words
A muffler in accordance with claim 1 including three attenuater can assemblies.
Claim 5
Dependent Claim
20 words
A muffler in accordance with claim 3 including a heat deflection shield located within said chamber opposite said inlet pipe.
Claim 6
Dependent Claim
32 words
A muffler in accordance with claim 4 including an external cylindrical heat shield extending around said outer wall, said heat shield including apertures for said outlet pipes extending through said outer wall.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |