US4570601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel delivery pipe
Assignee: Denso Corp
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Filing: 1984-11-08
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Granted: 1986-02-18
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Expires: 2004-11-08
Abstract
Abstract The fuel delivery pipe comprises a cylindrical main body provided with two closed ends and made of heat and electricity insulating plastic, a plurality of fuel outlet ports which are provided in a cylindrical wall of the main body and to which injectors of an internal combustion engine are connected for supplying fuel to the injectors, and a plurality of power supply connectors, each of which is provided near each of said fuel outlet ports and is electrically connected to an input connector provided in the cylindrical main body by means of lead wires embedded within the cylindrical main body in the molding process. A cable is connected to the input connector for supplying a fuel injection signal from a control computer thereto. When the injectors are connected to the fuel outlet ports, a power reception connector of each of the injectors is electrically connected to each of the power supply connectors.
Inventors
- 👤 Masaki Ito
- 👤 Hiroshi Yamazoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:18
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/46; F02M69/462; F02M69/465; F02D; F02D41/00; F02D41/30; F02D41/3005; F02M51/00; F02M51/005; F02M63/00; F02D2400/00; F02D2400/21; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A fuel delivery pipe for delivering fuel into injectors of an internal combustion engine comprising: a cylindrical main body provided with two closed ends and made of heat and electricity insulating plastic material, a fuel inlet pipe and a fuel return pipe being connected to said cylindrical main body; a fuel regulator provided in said cylindrical main body for regulating the fuel pressure within said cylindrical main body; a plurality of fuel outlet ports provided in a cylindrical wall of said cylindrical main body at predetermined intervals; said plurality of fuel outlet ports being to be connected to said injectors; an input connector provided in said cylindrical main body and connected to a fuel injection control computer by means of a cable; power supply connectors provided in said cylindrical main body and near said plurality of fuel outlet ports to be electrically connected to power reception connectors provided in said injectors; and lead wires embedded within said main body for electrically connecting said input connector and said power supply connectors.
Claim 2
Dependent Claim
170 words
A fuel delivery pipe for delivering fuel into injectors of an internal combustion engine comprising: a cylindrical main body provided with two closed ends and made of heat and electricity insulating plastic material, a fuel inlet pipe and a fuel return pipe being connected to said cylindrical main body; a fuel regulator provided in said cylindrical main body for regulating the fuel pressure within said cylindrical main body; a plurality of fuel outlet ports provided in a cylindrical wall of said cylindrical main body at predetermined intervals; said plurality of fuel outlet ports being to be connected to said injectors; an input connector provided in said cylindrical main body and connected to a fuel injection control computer by means of a cable; power supply connectors provided in said cylindrical main body and near said plurality of fuel outlet ports to be electrically connected to power reception connectors provided in said injectors; and lead wires embedded within said main body for electrically connecting said input connector and said power supply connectors.
Claim 3
Dependent Claim
19 words
A fuel delivery pipe according to claim 1, wherein said plastic material is one of nylon and polyphenylene sulphide.
Claim 4
Dependent Claim
30 words
A fuel delivery pipe according to claim 1, wherein said plastic material is reinforced plastic made of a mixture of one of nylon and polyphenylene sulphide, and an inorganic filler.
Claim 5
Dependent Claim
38 words
A fuel delivery pipe according to claim 1, wherein each of said input connector and said electric current supply connector is provided with a housing which is formed so as to be integral with said cylindrical main body.
Claim 6
Dependent Claim
88 words
A fuel delivery pipe according to claim 1, wherein each of said input connector and said power supply connector is provided with one pair of connector pins, said lead wires are composed of one pair of lead wires, and one of said one pair of lead wires connects one of said one pair of connector pins of said connectors to one another while the other of said one pair of lead wires connects the other of said one pair of connector pins of said connectors to one another.
Claim 7
Dependent Claim
106 words
A fuel delivery pipe according to claim 1, wherein said fuel inlet pipe is connected to one end of said cylindrical main body, said pressure regulator is provided within the other end of said cylindrical main body, said fuel delivery pipe further comprises a fuel return passage formed within a projecting portion extending from said the other end to said one end of said cylindrical main body along the outer wall thereof for flowing excess fuel released by means of said pressure regulator, and said fuel return passage opens at said one end of said cylindrical main body and is connected to said fuel return pipe.
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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) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |