US3859967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel feed system for recycling fuel
Assignee: Outboard Marine Corp
•
Filing: 1973-12-26
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Granted: 1975-01-14
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Expires: 1993-12-26
Abstract
Abstract Disclosed herein is a fuel feeding system comprising a carburetor having fuel passage means communicating between a fuel nozzle and a fuel bowl and including a sharp-edged orifice, together with means for controllably admitting air into the fuel passage means. Also disclosed herein is a fuel feeding system in which ''''ends'''' or ''''drains'''' are recycled from the crankcase through a sharp-edged orifice into an engine cylinder.
Inventors
- 👤 Robert K Turner
- 👤 Edgar Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:04
CPC Classifications
F; F02; F02M; F02M33/00; F02M33/02; F02M33/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
114 words
A two cycle internal combustion engine including a crankcase with a portion in which ''''drains'''' accumulate, a piston movable relative to said crankcase, a conduit communicating with said crankcase portion, valve means in said conduit preventing flow to said crankcase and permitting flow from said crankcase, and a carburetor including a fuel-air induction passage communicating with said crankcase, a fuel reservoir having a first inlet communicating with a fuel source and a second inlet communicating with said conduit, a fuel nozzle communicating with said air-fuel induction passage; fuel passage means communicating between said fuel reservoir and said nozzle and including a sharp-edged orifice, and means for controllably admitting air into said fuel passage means.
Claim 2
Dependent Claim
114 words
A two cycle internal combustion engine including a crankcase with a portion in which ''''drains'''' accumulate, a piston movable relative to said crankcase, a conduit communicating with said crankcase portion, valve means in said conduit preventing flow to said crankcase and permitting flow from said crankcase, and a carburetor including a fuel-air induction passage communicating with said crankcase, a fuel reservoir having a first inlet communicating with a fuel source and a second inlet communicating with said conduit, a fuel nozzle communicating with said air-fuel induction passage; fuel passage means communicating between said fuel reservoir and said nozzle and including a sharp-edged orifice, and means for controllably admitting air into said fuel passage means.
Claim 3
Dependent Claim
34 words
An engine in accordance with claim 1 and further including means in said conduit adjacent to said second inlet for relieving pressure on the ''''drains'''' prior to flow of said ''''drains'''' into said reservoir.
Claim 4
Dependent Claim
22 words
A carburetor in accordance with claim 2 wherein said air admitting means communicates with said fuel passage means downstream of said orifice.
Claim 5
Dependent Claim
22 words
A carburetor in accordance with claim 2 wherein said air admitting means communicates with said fuel passage means upstream of said orifice.
Claim 6
Dependent Claim
23 words
A carburetor in accordance with claim 1 wherein said orifice is located at the entrance to said fuel passage means from said reservoir.
Claim 7
Dependent Claim
65 words
A two-cycle internal engine including a crankcase having a portion in which ''''drains'''' accumulate, a cylinder extending from said crankcase, a piston movable in said cylinder and relative to said crankcase, a conduit communicating with said crankcase portion, valve means in said conduit preventing flow to said crankcase and permitting flow from said crankcase, said conduit communicating with said cylinder and including a sharp-edged orifice.
Claim 8
Dependent Claim
65 words
A two-cycle internal engine including a crankcase having a portion in which ''''drains'''' accumulate, a cylinder extending from said crankcase, a piston movable in said cylinder and relative to said crankcase, a conduit communicating with said crankcase portion, valve means in said conduit preventing flow to said crankcase and permitting flow from said crankcase, said conduit communicating with said cylinder and including a sharp-edged orifice.
Claim 9
Dependent Claim
37 words
An engine in accordance with claim 6 and further including a transfer passage communicating, subject to piston operation, between said crankcase and said cylinder, and wherein said conduit communicates with said cylinder independently of said transfer passage.
Claim 10
Dependent Claim
22 words
A carburetor in accordance with claim 1 wherein said air admitting means communicates with said fuel passage means downstream of said orifice.
Claim 11
Dependent Claim
22 words
A carburetor in accordance with claim 1 wherein said air admitting means communicates with said fuel passage means upstream of said orIfice.
Claim 12
Dependent Claim
82 words
A two-cycle internal combustion engine including a crankcase with a portion in which ''''drains'''' accumulate, a piston movable relative to said crankcase, a conduit communicating with said crankcase portion, valve means in said conduit preventing flow to said crankcase and permitting flow from said crankcase and a carburetor including a fuel-air induction passage communicating with said crankcase, a fuel nozzle communicating with said air-fuel induction passage, and fuel passage means communicating between said conduit and said nozzle and including a sharp-edged orifice.
Claim 13
Dependent Claim
82 words
A two-cycle internal combustion engine including a crankcase with a portion in which ''''drains'''' accumulate, a piston movable relative to said crankcase, a conduit communicating with said crankcase portion, valve means in said conduit preventing flow to said crankcase and permitting flow from said crankcase and a carburetor including a fuel-air induction passage communicating with said crankcase, a fuel nozzle communicating with said air-fuel induction passage, and fuel passage means communicating between said conduit and said nozzle and including a sharp-edged orifice.
Claim 14
Dependent Claim
20 words
An engine in accordance with claim 10 and further including means for controllably admitting air into said fuel passage means.
Claim 15
Dependent Claim
66 words
A two-cycle internal combustion engine including a crankcase with a portion in which ''''drains'''' accumulate, a piston movable relative to said crankcase, a conduit communicating with said crankcase portion and including a sharp-edged orifice, valve means in said conduit preventing flow to said crankcase and permitting flow from said crankcase, and a carburetor including a fuel-air induction passage communicating with said crankcase and with said conduit.
Claim 16
Dependent Claim
66 words
A two-cycle internal combustion engine including a crankcase with a portion in which ''''drains'''' accumulate, a piston movable relative to said crankcase, a conduit communicating with said crankcase portion and including a sharp-edged orifice, valve means in said conduit preventing flow to said crankcase and permitting flow from said crankcase, and a carburetor including a fuel-air induction passage communicating with said crankcase and with said conduit.
Claim 17
Dependent Claim
18 words
An engine in accordance with claim 12 and further including means for controllably admitting air into said conduit.
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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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |