US4346846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection nozzle
Assignee: Robert Bosch GmbH
•
Filing: 1980-12-05
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Granted: 1982-08-31
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Expires: 2000-12-05
Abstract
Abstract The invention proposes a fuel injection nozzle wherein the mounting, for example in the form of a cap nut or sleeve nut, used for clamping the fuel pressure line to the nozzle holder, is replaced by a cap screw, the outer thread of which engages a corresponding threaded area in the engine bore which is arranged to receive the nozzle. This has the result that, together with the mounting of the fuel line, the injection nozzle is simultaneously firmly clamped to the engine.
Inventors
- 👤 Ewald Eblen
- 👤 Karl Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:19
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/14; F02M55/00; F02M55/004; F02M55/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
158 words
Fuel injection nozzle having a fuel inlet end and a fuel injection end for internal combustion engines arranged to be supported in a bore of the internal combustion engine, further including a nozzle holder, said nozzle holder including an axially aligned bore therein and extraction means on its upper extremity for removal of said nozzle holder from said bore of said internal combustion engine, said extraction means including at least one groove in said upper extremity, a preassembled valve module secured in the bore of said nozzle holder from the injection side of said injection nozzle and an exteriorly threaded cap for clamping a fuel feed line to said nozzle holder, further wherein said internal combustion engine bore is threaded and arranged to receive said exteriorly threaded cap whereby said fuel feed line is clamped to said nozzle holder in an end-to-end pressure-tight fit and said nozzle holder is locked in said bore of said internal combustion engine.
Claim 2
Dependent Claim
158 words
Fuel injection nozzle having a fuel inlet end and a fuel injection end for internal combustion engines arranged to be supported in a bore of the internal combustion engine, further including a nozzle holder, said nozzle holder including an axially aligned bore therein and extraction means on its upper extremity for removal of said nozzle holder from said bore of said internal combustion engine, said extraction means including at least one groove in said upper extremity, a preassembled valve module secured in the bore of said nozzle holder from the injection side of said injection nozzle and an exteriorly threaded cap for clamping a fuel feed line to said nozzle holder, further wherein said internal combustion engine bore is threaded and arranged to receive said exteriorly threaded cap whereby said fuel feed line is clamped to said nozzle holder in an end-to-end pressure-tight fit and said nozzle holder is locked in said bore of said internal combustion engine.
Claim 3
Dependent Claim
33 words
Fuel injection nozzle according to claim 1, further wherein said preassembled valve module comprises a nozzle body provided with radially extending control orifices, a closing spring, a needle-connected abutment and a valve needle.
Claim 4
Dependent Claim
19 words
Fuel injection nozzle according to claim 2, further wherein said valve module is threadedly connected to said nozzle holder.
Claim 5
Dependent Claim
17 words
Fuel injection nozzle according to claim 1, further wherein said extraction means includes an exteriorly threaded portion.
Claim 6
Dependent Claim
44 words
Fuel injection nozzle according to claim 1, further wherein said nozzle holder extraction means includes an annular recessed collar, said exteriorly threaded cap has a proximate boundary wall and a clip associated with said cap has leg portions that extend into said recessed collar.
Claim 7
Dependent Claim
39 words
Fuel injection nozzle according to claim 1 further wherein said nozzle holder extraction means includes a recessed groove in its upper extremity, whereby a tangentially disposed pin extending through said cap is arranged to cooperate with said recessed groove.
Claim 8
Dependent Claim
37 words
Fuel injection nozzle as claimed in claim 1 further wherein said nozzle holder extraction means includes an annular groove and pin means for penetrating said cap for engaging said annular groove of said nozzle holder extraction means.
Claim 9
Dependent Claim
23 words
Fuel injection nozzle as claimed in claim 7 further wherein said pin means is formed by a spring clip placed around said cap.
Claim 10
Dependent Claim
24 words
Fuel injection nozzle as claimed in claim 7 further wherein said pin means is an elongated straight pin which engages said annular groove tangentially.
References Cited (Backward Citations)
FR961531A
Cited
DE335074C
Cited
GB467124A
Cited
FR840236A
Cited
US2244394A
Cited
US2310490A
Cited
US2428077A
Cited
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Cited
US3527485A
Cited
US3788546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |