US4209000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection systems
Assignee: Individual
•
Filing: 1978-12-28
•
Granted: 1980-06-24
•
Expires: 1998-12-28
Abstract
Abstract An improvement in fuel injection systems for diesel engines, by way of example, wherein, between the engine shutdown unit of the fuel pump and the air shutdown line from the cab there is interposed suitable structure which is responsive both to raised pressure in the fuel return line of the system and also to the air shutdown system for turning off fuel supply to the engine, either intentionally or by virtue of tampering with the fuel return line by the operator.
Inventors
- 👤 Terry L. Ivie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:08
CPC Classifications
F; F02; F02M; F02M63/00; F02M63/02; F02M63/0205; F02D; F02D17/00; F02D17/04; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
In a fuel injection system provided an engine including a fuel supply tank, a fuel pump provided with an air shut-down unit, an operator-actuated air shut-down line, an intake fuel line leading from said tank and connected to said fuel pump, an engine-routed fuel line leading from said air shut-down unit to said engine, and an overflow fuel return line coupled between said engine and said fuel tank: an improvement comprising first means for translating elevated fuel pressure in said overflow fuel return line, and second means interposed between said air shut-down line and said air shut-down unit and coupled via said translating means to said overflow fuel return line, said second means being responsive to elevated fluid pressure in either of said lines for actuating said air shut-down unit, thereby discontinuing fuel flow to said engine.
Claim 2
Dependent Claim
137 words
In a fuel injection system provided an engine including a fuel supply tank, a fuel pump provided with an air shut-down unit, an operator-actuated air shut-down line, an intake fuel line leading from said tank and connected to said fuel pump, an engine-routed fuel line leading from said air shut-down unit to said engine, and an overflow fuel return line coupled between said engine and said fuel tank: an improvement comprising first means for translating elevated fuel pressure in said overflow fuel return line, and second means interposed between said air shut-down line and said air shut-down unit and coupled via said translating means to said overflow fuel return line, said second means being responsive to elevated fluid pressure in either of said lines for actuating said air shut-down unit, thereby discontinuing fuel flow to said engine.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1 wherein said translating means comprises a conduit coupled to and between said air shut-down unit and said overflow fuel return line.
Claim 4
Dependent Claim
53 words
The apparatus of claim 1 wherein said air shut-down unit includes a fuel passageway and a movable valve operatively associated therewith, said second means having a pair of inlet ports, movable plunger means for actuating said valve, and a diaphragm separating said ports and disposed end-adjacent said plunger means for actuating the same.
Claim 5
Dependent Claim
39 words
The apparatus of claim 3 wherein said valve comprises a spring-biased plunger backed by a second diaphragm disposed opposite-end-adjacent said plunger means, said plunger means engaging said second diaphragm, said diaphragms isolating said ports also from said second plunger.
Claim 6
Dependent Claim
78 words
An adaptor for a fuel injection system comprising a body having an internal bore, first and second mutually-spaced diaphragms mounted for respectively facing opposite ends of said bore, a plunger movably disposed axially in said bore and positioned solely between said diaphragms, and a conduit attachment flange secured over said first diaphragm to said body, said body being provided with a lateral passageway terminating in an exterior connection port and an interior opening communicating with said second diaphragm.
Claim 7
Dependent Claim
78 words
An adaptor for a fuel injection system comprising a body having an internal bore, first and second mutually-spaced diaphragms mounted for respectively facing opposite ends of said bore, a plunger movably disposed axially in said bore and positioned solely between said diaphragms, and a conduit attachment flange secured over said first diaphragm to said body, said body being provided with a lateral passageway terminating in an exterior connection port and an interior opening communicating with said second diaphragm.
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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) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |