Patent USRE31218E successfully refreshed from Google Patents.
USRE31218E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel additive injection system for diesel engines
Assignee: Caterpillar Inc
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Filing: 1980-01-21
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Granted: 1983-04-26
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Expires: 2000-01-21
Abstract
Abstract A diesel fuel supply system for use with a diesel engine including a fuel pump for supplying fuel to the engine, a fuel tank connected to the pump for delivering fuel to the pump, a fuel additive tank, a valve, conduits connecting the additive tank to the pump through the valve in parallel to the fuel tank, and an operator for selectively operating the valve.
Inventors
- 👤 George E. Hicks
- 👤 John W. Litherland
- 👤 Arlan G. Martin
- 👤 Lawrence Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:49
CPC Classifications
F; F02; F02M; F02M43/00; F02M25/00; B; B60; B60K; B60K15/00; B60K15/03; B60K2015/03328; B60K2015/03348; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
In a diesel fuel supply system, the combination of: a fuel pump for supplying fuel to a diesel engine; a fuel tank connected to said pump for delivering fuel to the pump; a fuel additive tank; a valve; means connecting said additive tank to said pump through said valve in parallel relation to said fuel tank; and means for selectively operating said valve..].
Claim 2
Dependent Claim
63 words
In a diesel fuel supply system, the combination of: a fuel pump for supplying fuel to a diesel engine; a fuel tank connected to said pump for delivering fuel to the pump; a fuel additive tank; a valve; means connecting said additive tank to said pump through said valve in parallel relation to said fuel tank; and means for selectively operating said valve..].
Claim 3
Dependent Claim
119 words
.[.The diesel fuel supply system of claim 1 wherein.]. .Iadd.In a diesel fuel supply system, the combination of: a fuel pump for supplying fuel to a diesel engine; a fuel tank connected to said pump for delivering fuel to the pump; a fuel additive tank; a valve; means connecting said additive tank to said pump through said valve in parallel relation to said fuel tank; means for selectively operating said valve; .Iaddend. said valve .[.is.]. .Iadd.being .Iaddend.a solenoid operated valve and said operating means .[.comprises.]. .Iadd.comprising .Iaddend.a switch and a time delay relay connected in circuit with said valve for causing fluid communication between said pump and said additive tank for a predetermined period after actuation of said switch.
Claim 4
Dependent Claim
28 words
A diesel power unit including the diesel fuel supply system of claim 2 and further including a diesel engine connected to said fuel pump to receive fuel therefrom.
Claim 5
Dependent Claim
86 words
.[.The diesel fuel supply system of claim 1 further including.]. .Iadd.In a diesel fuel supply system, the combination of: a fuel pump for supplying fuel to a diesel engine; a fuel tank connected to said pump for delivering fuel to the pump; a fuel additive tank; a valve; means connecting said additive tank to said pump through said valve in parallel relation to said fuel tank; means for selectively operating said valve; .Iaddend. a fluid flow metering means interposed between said additive tank and said pump.
Claim 6
Dependent Claim
93 words
A diesel fuel supply system for use with diesel engines comprising: a fuel pump adapted to be connected to a diesel engine to supply fuel thereto; a first conduit connected to said fuel pump; a tee connected to said first conduit; a fuel tank; a second conduit interconnecting said tee and said fuel tank; a fuel additive tank; a normally closed, solenoid operated valve; a fluid metering orifice; a third conduit connecting said additive tank, said valve and said orifice in series to said tee; and an electrical control circuit for said valve.
Claim 7
Dependent Claim
93 words
A diesel fuel supply system for use with diesel engines comprising: a fuel pump adapted to be connected to a diesel engine to supply fuel thereto; a first conduit connected to said fuel pump; a tee connected to said first conduit; a fuel tank; a second conduit interconnecting said tee and said fuel tank; a fuel additive tank; a normally closed, solenoid operated valve; a fluid metering orifice; a third conduit connecting said additive tank, said valve and said orifice in series to said tee; and an electrical control circuit for said valve.
Claim 8
Dependent Claim
30 words
The diesel fuel supply system of claim 5 wherein said control circuit includes an electrical actuator and time delay means responsive thereto for energizing said valve for a predetermined time.
Claim 9
Dependent Claim
28 words
The diesel fuel supply system of claim 6 wherein said time delay means comprises a time delay relay and further including filters in said second and third conduits.
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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) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |