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Patent US3631671A successfully refreshed from Google Patents.
US3631671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust system for marine outdrive
Assignee: Dana Inc
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Filing: 1970-08-17
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Granted: 1972-01-04
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Expires: 1990-08-17
Abstract
Abstract A marine outdrive unit is provided which includes an exhaust system in which there is proper cooling of the exhaust gases and in which an easy connection to the prime mover can be made. Additionally, because of positioning and streamlining of the exhaust arrangement, it eliminates possible turbulence from the exhaust stream when the boat on which the outdrive unit is mounted is proceeding forwardly in high-speed operation. The exhaust system comprises a pair of cavities which extend arcuately around the periphery of the outdrive housing and open at their inlet and outlet ends into angularly disposed flanges (relative to the axial extent of the marine outdrive unit) so as to provide easy connection to the marine drive engine and an exhaust flow which does not create turbulence adjacent to the propeller of the marine outdrive unit.
Inventors
- 👤 James T Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:08
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/24; B63H20/245; F; F01; F01N; F01N3/00; F01N3/02; F01N3/04; F02; F02B; F02B61/00; F02B61/04; F02B61/045; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
144 words
The combination with a marine drive system having an inboard engine with an exhaust system and an outdrive unit, of a housing located intermediate said engine and outdrive unit on a longitudinal axis extending therebetween, said housing having an arcuate inner wall portion, an arcuately shaped passageway extending around the periphery of said wall portion and being defined by an outer wall integral with said inner wall portion, said passageway being ported at one end to a flat faced flange disposed at an angle to said longitudinal axis, the opposite end of said passageway being open to form an exhaust outlet, said inner wall portion extending axially beyond said outer wall at said exhaust outlet whereby exhaust gases may expand outwardly away from said housing, and connecting means for connecting said flat faced flange to the exhaust system of said engine in exhausttight relationship.
Claim 2
Dependent Claim
144 words
The combination with a marine drive system having an inboard engine with an exhaust system and an outdrive unit, of a housing located intermediate said engine and outdrive unit on a longitudinal axis extending therebetween, said housing having an arcuate inner wall portion, an arcuately shaped passageway extending around the periphery of said wall portion and being defined by an outer wall integral with said inner wall portion, said passageway being ported at one end to a flat faced flange disposed at an angle to said longitudinal axis, the opposite end of said passageway being open to form an exhaust outlet, said inner wall portion extending axially beyond said outer wall at said exhaust outlet whereby exhaust gases may expand outwardly away from said housing, and connecting means for connecting said flat faced flange to the exhaust system of said engine in exhausttight relationship.
Claim 3
Dependent Claim
20 words
The combination of claim 1, wherein said arcuately shaped passageway is on a plane substantially parallel to said longitudinal axis.
Claim 4
Dependent Claim
20 words
The combination of claim 1, wherein said connecting means comprises an elbow and a flexible conduit assembled in exhausttight relationship.
Claim 5
Dependent Claim
16 words
The combination of claim 1, wherein said arcuately shaped passageway is of substantially uniform cross section.
Claim 6
Dependent Claim
162 words
The combination with a marine drive system having an inboard engine with an exhaust manifold and a depending outdrive unit, of a housing located intermediate said engine and outdrive unit on a longitudinal axis extending therebetween and providing a support for said outdrive unit, said housing having an arcuate inner wall portion, a pair of opposed arcuately shaped passageways extending around the periphery of said inner wall portion and being defined by respective outer walls integral with said inner wall portion, each of said passageways being ported at one end to a flat faced flange disposed at an angle to said longitudinal axis, the opposite end of each of said passageways being open to form an exhaust outlet, said inner wall portion extending axially beyond each of said outer walls at said exhaust outlets thereby permitting exhaust gases to expand outwardly from said housing, and connecting means for connecting each of said flat faced flanges to the exhaust system of said engine.
Claim 7
Dependent Claim
162 words
The combination with a marine drive system having an inboard engine with an exhaust manifold and a depending outdrive unit, of a housing located intermediate said engine and outdrive unit on a longitudinal axis extending therebetween and providing a support for said outdrive unit, said housing having an arcuate inner wall portion, a pair of opposed arcuately shaped passageways extending around the periphery of said inner wall portion and being defined by respective outer walls integral with said inner wall portion, each of said passageways being ported at one end to a flat faced flange disposed at an angle to said longitudinal axis, the opposite end of each of said passageways being open to form an exhaust outlet, said inner wall portion extending axially beyond each of said outer walls at said exhaust outlets thereby permitting exhaust gases to expand outwardly from said housing, and connecting means for connecting each of said flat faced flanges to the exhaust system of said engine.
Claim 8
Dependent Claim
23 words
The combination of claim 5, wherein said arcuately shaped passageways are on a common plane that is substantially parallel to said longitudinal axis.
Claim 9
Dependent Claim
25 words
The combination of claim 5, wherein the connecting means for each of flat-faced flanges comprises an elbow and a flexible conduit assembled in exhausttight relationship.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |