Patent US4744778A successfully refreshed from Google Patents.
US4744778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine engine exhaust muffler with swim platform
Assignee: THUNDERBIRD PRODUCTS Corp A CORP OF FL
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Filing: 1986-07-21
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Granted: 1988-05-17
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Expires: 2006-07-21
Abstract
Abstract An exhaust muffler for mounting on the transom of an inboard or inboard/outboard motor boat over the exhaust pipes which extend through the transom includes a top which forms a swim platform. The muffler comprises a housing which has a pair of sidewalls each adjacent to one of the sides of the boat, so that the housing is approximately equal in width with the width of the boat at the stern. The top of the housing forms the swim platform which provides a functional and attractive appearance to the exterior muffler.
Inventors
- 👤 Victor B. Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:14
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/12; B; B63; B63B; B63B27/00; B63B27/14; B63H; B63H21/00; B63H21/32; F01N13/004; F01N2590/00; F01N2590/02; F02; F02B; F02B61/00; F02B61/04; F02B61/045
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
An outboard exhaust muffler for a motor boat having an exhaust pipe through which exhaust is emitted through the transom above the water line at the stern, which comprises: an enclosed housing located at the stern of the boat over the exhaust pipe into which the exhaust is emitted, the housing being attached to the transom and extending aft of the transom and aft of the boat, the space within the enclosed housing defining muffler means for reducing the noise of the exhaust, the housing comprising: a pair of sidewalls each adjacent to one of the sides of the boat extending aft of the transom; a top extending between the two sidewalls above the exhaust pipe, the top being above and near the water line and forming a swim platform; a bottom extending between the two sidewalls below the exhaust pipe; a rear wall extending from the top to the bottom between the two sidewalls, the rear wall having an exhaust port through which the exhaust leaves the enclosed housing.
Claim 2
Dependent Claim
170 words
An outboard exhaust muffler for a motor boat having an exhaust pipe through which exhaust is emitted through the transom above the water line at the stern, which comprises: an enclosed housing located at the stern of the boat over the exhaust pipe into which the exhaust is emitted, the housing being attached to the transom and extending aft of the transom and aft of the boat, the space within the enclosed housing defining muffler means for reducing the noise of the exhaust, the housing comprising: a pair of sidewalls each adjacent to one of the sides of the boat extending aft of the transom; a top extending between the two sidewalls above the exhaust pipe, the top being above and near the water line and forming a swim platform; a bottom extending between the two sidewalls below the exhaust pipe; a rear wall extending from the top to the bottom between the two sidewalls, the rear wall having an exhaust port through which the exhaust leaves the enclosed housing.
Claim 3
Dependent Claim
32 words
An exhaust muffler as defined in claim 1, wherein the sidewalls of the housing include an upper sidewall portion extending above the top of the housing and sloping upwardly toward the transom.
Claim 4
Dependent Claim
16 words
An exhaust muffler as defined in claim 1, wherein the rear wall includes a recessed portion.
Claim 5
Dependent Claim
25 words
An exhaust muffler as defined in claim 3, wherein the recessed portion of the rear wall is located in the central portion of the housing.
Claim 6
Dependent Claim
25 words
An exhaust muffler as defined in claim 1, wherein the muffler means includes at least one baffle extending vertically directly rearwardly of the exhaust pipe.
Claim 7
Dependent Claim
25 words
An exhaust muffler as defined in claim 1, wherein the muffler means includes at least one baffle extending downwardly from the top of the housing.
Claim 8
Dependent Claim
25 words
An exhaust muffler as defined in claim 1, wherein the muffler means includes at least one baffle extending upwardly from the bottom of the housing.
Claim 9
Dependent Claim
30 words
An exhaust muffler as defined in claim 1, wherein the muffler means includes at least one baffle extending downwardly from the top of the housing in a rearwardly sloped direction.
Claim 10
Dependent Claim
30 words
An exhaust muffler as defined in claim 1, wherein the muffler means includes at least one baffle extending upwardly from the bottom of the housing in a rearwardly sloped direction.
Claim 11
Dependent Claim
30 words
An exhaust muffler as defined in claim 1 for a motor boat having a plurality of exhaust pipes, wherein there are a plurality of exhaust ports in the rear wall.
References Cited (Backward Citations)
US1065707A
Cited
US830908A
Cited
GB622414A
Cited
US3452704A
Cited
US3599595A
Cited
US3742895A
Cited
US4002136A
Cited
US4167987A
Cited
US4586908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |