US3820723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection nozzle for internal combustion engine and the like
Assignee: Deere and Co
•
Filing: 1973-03-21
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Granted: 1974-06-28
•
Expires: 1993-03-21
Abstract
Abstract A fuel injection nozzle of the type in which the needle valve and spring are eccentric and there is interposed between the needle valve and spring a low-mass hollow member having excellent bearing relation to the spring bore so as to prevent cocking and to enable the use of a spring of maximum diameter consistent with the diameter of the spring bore and the size of the needle valve.
Inventors
- 👤 J Shipinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:23
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
153 words
A fuel injection nozzle of the type in which the axially reciprocatable needle valve is acted on by a spring contained in a spring bore that is eccentric to the needle valve, characterized in that there is disposed in the spring bore an axially reciprocatable member between the spring and needle valve, said member being of hollow cylindrical form and of substantial axial length so as to provide a good bearing surface with the spring bore to prevent cocking of the member in the bore, the member having axially spaced apart opposite ends, one of which abuts the needle valve and the other of which is abutted by the spring, the member being of relatively light-weight construction so as to reduce weight and mass and the spring being of such diameter as to tolerably fit the bore whereby to increase its force on the member and through the member to the needle valve.
Claim 2
Dependent Claim
153 words
A fuel injection nozzle of the type in which the axially reciprocatable needle valve is acted on by a spring contained in a spring bore that is eccentric to the needle valve, characterized in that there is disposed in the spring bore an axially reciprocatable member between the spring and needle valve, said member being of hollow cylindrical form and of substantial axial length so as to provide a good bearing surface with the spring bore to prevent cocking of the member in the bore, the member having axially spaced apart opposite ends, one of which abuts the needle valve and the other of which is abutted by the spring, the member being of relatively light-weight construction so as to reduce weight and mass and the spring being of such diameter as to tolerably fit the bore whereby to increase its force on the member and through the member to the needle valve.
Claim 3
Dependent Claim
30 words
The invention defined in claim 1 in which the member end abutted by the spring is free from axial extensions into the spring bore radially outwardly of the spring diameter.
Claim 4
Dependent Claim
41 words
The invention defined in claim 1 in which the member is in the form of a cup having an annular wall fitting the spring bore and an integral end abutted by the spring and a closure end abutting the needle valve.
Claim 5
Dependent Claim
16 words
The invention defined in claim 3 in which the ends of the member have orifices therein.
Claim 6
Dependent Claim
27 words
The invention defined in claim 1 in which the axial length of the member is on the order of one-third to one-fifth that of the needle valve.
Claim 7
Dependent Claim
25 words
The invention defined in claim 5 in which the spring is a coil spring having a normal length of approximately twice that of the member.
Claim 8
Dependent Claim
29 words
The invention defined in claim 1 in which the diameter of the member is approximately four times that of the needle valve at the injection end of said valve.
Claim 9
Dependent Claim
20 words
The invention defined in claim 1 in which the member has a relatively thin annular wall and relatively thin ends.
Claim 10
Dependent Claim
28 words
The invention defined in claim 2 in which the needle-valve proximate end of the cup-shaped member is internally shouldered and the closure is cooperatively externally shouldered to fit.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |