US4582039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel supply system for an internal combustion engine
Assignee: Kawasaki Motors Ltd
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Filing: 1984-12-03
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Granted: 1986-04-15
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Expires: 2004-12-03
Abstract
Abstract This disclosure relates to a fuel supply system for an internal combustion engine, wherein a suction type fuel supply system supplies fuel through a fuel pump to a carburetor which is located at a level higher than the fuel level of the main fuel tank. In one disclosed embodiment, a reserve fuel tank is provided on the line connecting the main fuel tank with the fuel pump, and the reserve tank is at a level higher than the carburetor and the fuel pump, the fuel outlet of the reserve tank is located at a level lower than the fuel inlet. According to an alternative embodiment, a fuel supply system is provided wherein a suction type fuel supply system supplies fuel through a fuel pump to a carburetor which is located at a level higher than the fuel level of the main fuel tank. The supply line between the fuel pump and the carburetor is branched and forms a return circuit leading to the upstream side of the fuel pump, and a reserve fuel tank is installed in the return circuit at a level above the carburetor and the fuel pump. A standby outlet connected to the upstream side of the reserve tank is provided at a level below the outlet of said reserve tank, and the flow through the inlet of the reserve tank and the standby outlet can be switched over from one to the other.
Inventors
- 👤 Hiroshi Nishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:01
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/0047; F02M37/0052; F02M37/0058; F02M37/0076; F02M37/0088; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
166 words
A fuel supply system for an internal combustion engine, comprising: a. a main fuel tank; b. a carburetor located at a higher level than the fuel level of said main fuel tank; c. a first fuel line connected to said main fuel tank and adapted to extend into the fuel in said main fuel tank; d. a pump having an intake operatively connected to said first fuel line, said pump further having an output connected to said carburetor; e. a second fuel line connected to said pump output; f. a reserve fuel tank having a first fuel inlet and a first fuel outlet which is at a lower level than said first fuel inlet, said reserve fuel tank being at a higher level than said carburetor, said first fuel outlet being operatively connected to said carburetor, and said first fuel inlet being connected to one of said first and second fuel lines; and g. a control valve connected between said first fuel outlet and said carburetor.
Claim 2
Dependent Claim
166 words
A fuel supply system for an internal combustion engine, comprising: a. a main fuel tank; b. a carburetor located at a higher level than the fuel level of said main fuel tank; c. a first fuel line connected to said main fuel tank and adapted to extend into the fuel in said main fuel tank; d. a pump having an intake operatively connected to said first fuel line, said pump further having an output connected to said carburetor; e. a second fuel line connected to said pump output; f. a reserve fuel tank having a first fuel inlet and a first fuel outlet which is at a lower level than said first fuel inlet, said reserve fuel tank being at a higher level than said carburetor, said first fuel outlet being operatively connected to said carburetor, and said first fuel inlet being connected to one of said first and second fuel lines; and g. a control valve connected between said first fuel outlet and said carburetor.
Claim 3
Dependent Claim
35 words
A system according to claim 1, wherein said first fuel inlet of said reserve tank is connected to said first fuel line, and said first fuel outlet is connected through said pump to said carburetor.
Claim 4
Dependent Claim
23 words
A system according to claim 2, wherein said reserve fuel tank further includes a second fuel inlet connected to said second fuel line.
Claim 5
Dependent Claim
25 words
A system according to claim 1, wherein said reserve fuel tank further includes a second fuel outlet operatively connected to said intake of said pump.
Claim 6
Dependent Claim
13 words
A system according to claim 1, wherein said pump is a suction type.
Claim 7
Dependent Claim
26 words
A system according to claim 1, wherein said first fuel inlet of said reserve tank is connected to said second fuel line and to said carburetor.
Claim 8
Dependent Claim
129 words
A fuel supply system for an internal combustion engine, comprising: a. a main fuel tank; b. a carburetor located at a higher level than the fuel level of said main fuel tank; c. a first fuel line connected to said main fuel tank and adapted to extend into the fuel in said main fuel tank; d. a pump having an intake operatively connected to said first fuel line, said pump further having an output connected to said carburetor; e. a reserve fuel tank having an inlet and an outlet, said outlet being located at a higher level than said carburetor and being operatively connected to said carburetor, and said inlet being operatively connected to said pump output; and f. a control valve connected between said outlet and said carburetor.
Claim 9
Dependent Claim
129 words
A fuel supply system for an internal combustion engine, comprising: a. a main fuel tank; b. a carburetor located at a higher level than the fuel level of said main fuel tank; c. a first fuel line connected to said main fuel tank and adapted to extend into the fuel in said main fuel tank; d. a pump having an intake operatively connected to said first fuel line, said pump further having an output connected to said carburetor; e. a reserve fuel tank having an inlet and an outlet, said outlet being located at a higher level than said carburetor and being operatively connected to said carburetor, and said inlet being operatively connected to said pump output; and f. a control valve connected between said outlet and said carburetor.
Claim 10
Dependent Claim
109 words
A fuel supply system comprising a main fuel tank, a suction type fuel pump, a carburetor located at a level higher than the fuel level of said main fuel tank, said carburetor being connected to receive fuel from said pump, a reserve fuel tank located at a level higher than said carburetor and said fuel pump, said reserve fuel tank having an inlet operatively connected to said main fuel tank and an outlet operatively connected to said pump, a control valve connected between said outlet and said pump, and said outlet of said reserve fuel tank being located at a level below said inlet of said reserve fuel tank.
Claim 11
Dependent Claim
109 words
A fuel supply system comprising a main fuel tank, a suction type fuel pump, a carburetor located at a level higher than the fuel level of said main fuel tank, said carburetor being connected to receive fuel from said pump, a reserve fuel tank located at a level higher than said carburetor and said fuel pump, said reserve fuel tank having an inlet operatively connected to said main fuel tank and an outlet operatively connected to said pump, a control valve connected between said outlet and said pump, and said outlet of said reserve fuel tank being located at a level below said inlet of said reserve fuel tank.
Claim 12
Dependent Claim
135 words
A fuel supply system comprising a main fuel tank, a suction type fuel pump, a carburetor located at a level higher than the fuel level of said main fuel tank, said carburetor being connected to receive fuel from said pump, a reserve fuel tank located at a level higher than said carburetor and said fuel pump, said reserve fuel tank having an inlet operatively connected to said main fuel tank and an outlet operatively connected to said pump, and said outlet of said reserve fuel tank being located at a level below said inlet of said reserve fuel tank, said reserve fuel tank being provided with two outlets, including said first-mentioned outlet, said two outlets being at upper and lower points, and a valve connected to said outlets for changing over one from the other.
Claim 13
Dependent Claim
135 words
A fuel supply system comprising a main fuel tank, a suction type fuel pump, a carburetor located at a level higher than the fuel level of said main fuel tank, said carburetor being connected to receive fuel from said pump, a reserve fuel tank located at a level higher than said carburetor and said fuel pump, said reserve fuel tank having an inlet operatively connected to said main fuel tank and an outlet operatively connected to said pump, and said outlet of said reserve fuel tank being located at a level below said inlet of said reserve fuel tank, said reserve fuel tank being provided with two outlets, including said first-mentioned outlet, said two outlets being at upper and lower points, and a valve connected to said outlets for changing over one from the other.
Claim 14
Dependent Claim
127 words
A fuel supply system comprising a main fuel tank, a suction type fuel pump, a curburetor located at a level higher than the fuel level of said main fuel tank, said carburetor being connected to receive fuel from said pump, a reserve fuel tank located at a level higher than said carburetor and said fuel pump, said reserve fuel tank having an inlet operatively connected to said main fuel tank and an outlet operatively connected to said pump, and said outlet of said reserve fuel tank being located at a level below said inlet of said reserve fuel tank, and a supply line between said fuel pump and said carburetor, said supply line including a return circuit branch leading from said pump to said reserve fuel tank.
Claim 15
Dependent Claim
127 words
A fuel supply system comprising a main fuel tank, a suction type fuel pump, a curburetor located at a level higher than the fuel level of said main fuel tank, said carburetor being connected to receive fuel from said pump, a reserve fuel tank located at a level higher than said carburetor and said fuel pump, said reserve fuel tank having an inlet operatively connected to said main fuel tank and an outlet operatively connected to said pump, and said outlet of said reserve fuel tank being located at a level below said inlet of said reserve fuel tank, and a supply line between said fuel pump and said carburetor, said supply line including a return circuit branch leading from said pump to said reserve fuel tank.
Claim 16
Dependent Claim
149 words
A fuel supply system comprising a main fuel tank, a suction type fuel pump, a carburetor located at a level higher than the fuel level of said main fuel tank and connected to the outlet of said fuel pump, a supply line connected between said fuel pump and said carburetor and branched to also form a return circuit returning to the upstream side of said fuel pump, and a reserve fuel tank is installed in said return circuit at a level above said carburetor and said fuel pump, said reserve fuel tank including a standly outlet at the upstream side of said reserve tank and a main outlet at a level which is above said standby outlet, said reserve fuel tank further comprising an inlet connected to said branch of said return circuit, and means for switching between said inlet of said reserve fuel tank and said standby outlet.
Claim 17
Dependent Claim
149 words
A fuel supply system comprising a main fuel tank, a suction type fuel pump, a carburetor located at a level higher than the fuel level of said main fuel tank and connected to the outlet of said fuel pump, a supply line connected between said fuel pump and said carburetor and branched to also form a return circuit returning to the upstream side of said fuel pump, and a reserve fuel tank is installed in said return circuit at a level above said carburetor and said fuel pump, said reserve fuel tank including a standly outlet at the upstream side of said reserve tank and a main outlet at a level which is above said standby outlet, said reserve fuel tank further comprising an inlet connected to said branch of said return circuit, and means for switching between said inlet of said reserve fuel tank and said standby outlet.
References Cited (Backward Citations)
US1305037A
Cited
US1304550A
Cited
FR493051A
Cited
US1404152A
Cited
US1348406A
Cited
US1424486A
Cited
US1712492A
Cited
US1957754A
Cited
US3747903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |