Patent US3901204A successfully refreshed from Google Patents.
US3901204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for supplying fuel to internal combustion engines
Assignee: MBK Industrie SA
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Filing: 1973-12-05
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Granted: 1975-08-26
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Expires: 1993-12-05
Abstract
Abstract A system for supplying fuel to internal combustion engines by medium pressure injection including a pressurized fuel tank, a specially designed fuel pump and an electromagnetic fuel injector. The pump is a diaphragm-type pump of smaller diaphragm surface and increased spring pressure compared to conventional diaphragm-type fuel pumps. It is designed to provide an output fuel pressure at substantially that level necessary for feeding the injector thus obviating the necessity for a pressure regulator.
Inventors
- 👤 Eric Jaulmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:12
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F02; F02M; F02M59/00; F02M59/12; F02M59/14; F02M69/00; F02M69/02; F04B49/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
A system for supplying fuel to internal combustion engines by medium pressure injection, comprising: a fuel tank; a fuel injector; a diaphragm-type fuel pump means for supplying fuel from said tank to said injector, said fuel pump means having an inlet, an outlet, a diaphragm and a spring return means; linkage means for driving said fuel pump at a speed proportional to that of the engine; means for causing fuel from said fuel tank to enter the intake of said fuel pump means at a predetermined pressure; and line means for directly connecting the output of said fuel pump means to said injector without interposition of any pressure regulating means; wherein the effective diaphragm area in said fuel pump means is at most 400 square millimeters and the force exercised by said spring return means is at least 3 kg, whereby the fuel pump means output pressure will remain substantially constant as the fuel pump means output flow vaRies from a substantially nil value up to a predetermined maximum value.
Claim 2
Independent Claim
170 words
A system for supplying fuel to internal combustion engines by medium pressure injection, comprising: a fuel tank; a fuel injector; a diaphragm-type fuel pump means for supplying fuel from said tank to said injector, said fuel pump means having an inlet, an outlet, a diaphragm and a spring return means; linkage means for driving said fuel pump at a speed proportional to that of the engine; means for causing fuel from said fuel tank to enter the intake of said fuel pump means at a predetermined pressure; and line means for directly connecting the output of said fuel pump means to said injector without interposition of any pressure regulating means; wherein the effective diaphragm area in said fuel pump means is at most 400 square millimeters and the force exercised by said spring return means is at least 3 kg, whereby the fuel pump means output pressure will remain substantially constant as the fuel pump means output flow vaRies from a substantially nil value up to a predetermined maximum value.
Claim 3
Dependent Claim
19 words
A system according to claim 1, wherein the output pressure of said fuel pump means is about 2 kg/cm2.
Claim 4
Dependent Claim
20 words
A system according to claim 1, wherein said line means connecting said fuel pump means to said injector is resilient.
Claim 5
Dependent Claim
37 words
A system according to claim 1, wherein said means for causing fuel to enter the intake of said fuel pump means at a predetermined pressure comprises means for locating said tank above the level of said pump.
Claim 6
Dependent Claim
29 words
A system according to claim 1, wherein said means for causing fuel to enter the intake of said fuel pump means at a predetermined pressure comprises an auxiliary pump.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |