US4848283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine engine with combination vapor return, crankcase pressure, and cooled fuel line conduit
Assignee: Brunswick Corp
•
Filing: 1988-04-15
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Granted: 1989-07-18
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Expires: 2008-04-15
Abstract
Abstract A marine propulsion system includes a two cycle water cooled crankcase compression internal combustion engine (52) including a vapor separator (33), a remote fuel tank (60), and a fuel pump (62) in the tank for delivering fuel to the engine in response to crankcase pulse pressure. A combination conduit (64) between the fuel tank and the engine includes a first passage (66) communicating crankcase pulse pressure from the engine to the fuel pump in the tank, a second passage (70) supplying fuel from the pump in the tank to the engine, a third passage (74) returing fuel vapor from the vapor separator at the engine back to the tank, a fourth passage (78) supplying cooling water from the engine towards the tank, and a fifth passage (82) returning water from the fourth passage back to the engine.
Inventors
- 👤 John F. Garms
- 👤 Norman H. Radtke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:53
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/0011; F02M37/0017; F02B; F02B61/00; F02B61/04; F02B61/045; F02M31/00; F02M31/20; F02M37/0047; F02M37/007; F28; F28F; F28F21/00; F28F21/06; F28F21/062; F28F7/00; F28F7/02; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02M37/0052; F02M37/20; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S123/00; Y10S123/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A marine propulsion system comprising a two cycle crankcase compression water cooled internal combustion engine with a vapor separator, a remote fuel tank, a fuel pump at said tank for delivering fuel to said engine in response to crankcase pulse pressure, a conduit connected between said fuel tank and said engine, said conduit having a first passage communicating crankcase pulse pressure from said engine to said fuel pump at said remote fuel tank, said conduit having a second passage supplying fuel from said fuel pump to said engine, said conduit having a third passage returning fuel vapor from said vapor separator at said engine back to said remote fuel tank, said conduit having a fourth passage supplying cooling water from said engine towards said remote fuel tank, said conduit having a fifth passage returning water from said fourth passage back to said engine.
Claim 2
Dependent Claim
143 words
A marine propulsion system comprising a two cycle crankcase compression water cooled internal combustion engine with a vapor separator, a remote fuel tank, a fuel pump at said tank for delivering fuel to said engine in response to crankcase pulse pressure, a conduit connected between said fuel tank and said engine, said conduit having a first passage communicating crankcase pulse pressure from said engine to said fuel pump at said remote fuel tank, said conduit having a second passage supplying fuel from said fuel pump to said engine, said conduit having a third passage returning fuel vapor from said vapor separator at said engine back to said remote fuel tank, said conduit having a fourth passage supplying cooling water from said engine towards said remote fuel tank, said conduit having a fifth passage returning water from said fourth passage back to said engine.
Claim 3
Dependent Claim
21 words
The invention according to claim 1 wherein said fourth and fifth passages are in heat transfer relation with said second passage.
Claim 4
Dependent Claim
24 words
The invention according to claim 2 wherein said fourth passage communicates with said fifth passage through a U-shaped bend proximate said remote fuel tank.
Claim 5
Dependent Claim
46 words
The invention according to claim 2 comprising an oil-fuel mixing valve connected in said second passage for mixing oil from an oil source with fuel flowing to said engine, and wherein said mixing valve is cooled with water from one of said fourth and fifth passages.
Claim 6
Dependent Claim
36 words
The invention according to claim 2 comprising a squeeze bulb connected in said second passage for priming said engine, and wherein said squeeze bulb is cooled with water from one of said fourth and fifth passages.
References Cited (Backward Citations)
US26400A
Cited
USRE26400E
Cited
US2466440A
Cited
US2656828A
Cited
US2791186A
Cited
US2935057A
Cited
US2952252A
Cited
US3541786A
Cited
US3835822A
Cited
US3859951A
Cited
US3924975A
Cited
US3886914A
Cited
US3983857A
Cited
US4059086A
Cited
US3987775A
Cited
US4220121A
Cited
US4306614A
Cited
US4294470A
Cited
US4301781A
Cited
US4312304A
Cited
US4392779A
Cited
US4372011A
Cited
US4539949A
Cited
US4504238A
Cited
US4514106A
Cited
US4491117A
Cited
US4480605A
Cited
US4573318A
Cited
US4583500A
Cited
US4728306A
Cited
US4768492A
Cited
JPH106123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |