US3767123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection nozzle holder seal
Assignee: Deutz Allis Corp
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Filing: 1972-02-25
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Granted: 1973-10-23
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Expires: 1992-02-25
Abstract
Abstract A fuel injection nozzle holder assembly and a differential valve pressure adjusting screw for accurately maintaining the differential valve opening pressure and lift.
Inventors
- 👤 A Dreisin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:02
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/04; F02M61/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
A fuel injection nozzle holder assembly comprising a nozzle holder defining a central bore having a threaded internal portion on its upper end, a nozzle including a differential valve connected to the lower end of said nozzle holder with said differential valve connected with said bore, a differential valve opening pressure adjusting screw having a cylindrical lower portion and a threaded upper portion threadedly engaging the threaded portion of said holder, a differential valve needle in said differential valve, a spindle and differential valve closing spring compressively positioned between said adjusting screw and said differential valve needle, a valve movement limiting means limiting the opening movement of said differential valve including a shoulder defined by said differential valve needle, an abutting surface on said nozzle holder for engaging said shoulder when said valve is open, a seal positioned between the threaded portion of said adjusting screw and said valve movement limiting means, said seal engaging the bore of said holder and the cylindrical surface of said adjusting screw and providing a fluid tight seal preventing particles loosened From the threaded portion of said nozzle holder when said differential valve is adjusted from entering said fuel injection nozzle holder assembly.
Claim 2
Dependent Claim
199 words
A fuel injection nozzle holder assembly comprising a nozzle holder defining a central bore having a threaded internal portion on its upper end, a nozzle including a differential valve connected to the lower end of said nozzle holder with said differential valve connected with said bore, a differential valve opening pressure adjusting screw having a cylindrical lower portion and a threaded upper portion threadedly engaging the threaded portion of said holder, a differential valve needle in said differential valve, a spindle and differential valve closing spring compressively positioned between said adjusting screw and said differential valve needle, a valve movement limiting means limiting the opening movement of said differential valve including a shoulder defined by said differential valve needle, an abutting surface on said nozzle holder for engaging said shoulder when said valve is open, a seal positioned between the threaded portion of said adjusting screw and said valve movement limiting means, said seal engaging the bore of said holder and the cylindrical surface of said adjusting screw and providing a fluid tight seal preventing particles loosened From the threaded portion of said nozzle holder when said differential valve is adjusted from entering said fuel injection nozzle holder assembly.
Claim 3
Dependent Claim
37 words
A fuel injection nozzle holder assembly as set forth in claim 1 wherein said nozzle holder assembly includes, a lock nut to adjustably lock said adjusting screw to maintain a predetermined opening pressure of said differential valve.
Claim 4
Dependent Claim
39 words
A fuel injection nozzle holder assembly as set forth in claim 1 wherein said bore in said nozzle holder defines a drain passage, means defining a supply passage connected to said differential valve for supplying fuel for fuel injection.
Claim 5
Dependent Claim
54 words
A fuel injection nozzle holder assembly as set forth in claim 1 wherein said bore in said nozzle holder includes means defining an enlarged opening in the upper end of said bore, said adjusting screw and said enlarged opening in said nozzle holder defining a spring chamber for receiving said differential valve closing spring.
Claim 6
Dependent Claim
70 words
A fuel injection nozzle holder assembly as set forth in claim 1 wherein said nozzle defines a differential valve chamber, said differential valve needle includes means extending into said chamber adapted for opening in response to pressurized fluid of a predetermined value in said differential valve chamber, said bore in said nozzle holder defining a drain passage adapted for draining fuel leakage from said differential valve to a fuel tank.
Claim 7
Dependent Claim
70 words
A fuel injection nozzle holder assembly as set forth in claim 1 wherein said nozzle holder defines an enlarged opening at the upper end of said bore, said adjusting screw and said nozzle holder define a spring chamber for receiving said differential valve closing spring, means defining an annular groove in said nozzle holder, a seal received in said groove for slidably engaging the cylindrical portion of said adjusting screw.
Claim 8
Dependent Claim
48 words
A fuel injection nozzle holder assembly as set forth in claim 1 wherein said adjusting screw defines a reduced diameter cylindrical lower portion, an annular groove in said bore of said nozzle holder adapted for receiving said seal and slidably engaging the cylindrical surface of said adjusting screw.
Claim 9
Dependent Claim
53 words
A fuel injection nozzle holder assembly as set forth in claim 1 wherein said spindle defines a spring seat, means defining a spring opening in said adjusting screw, said differential valve closing spring compressively positioned between said adjusting screw and said spring seat to compressively bias said differential valve towards a closed position.
Claim 10
Dependent Claim
58 words
A fuel injection nozzle holder assembly as set forth in claim 1 wherein said adjusting screw defines a cylindrical opening for receiving said differential valve closing spring, said nozzle holder defines an enlarged cylindrical opening in communication with said bore to thereby define a spring chamber for compressively positioning said differential valve closing spring in said nozzle assembly.
Claim 11
Dependent Claim
88 words
A fuel injection nozzle holder assembly as set forth in claim 1 wherein said nozzle holder defines a radial surface on its upper end, said adjusting screw defines a threaded external periphery on its upper portion, a locking nut threadedly received on the external periphery of said adjusting screw to thereby lock said adjusting screw in said nozzle holder when said lock nut is tightened against said radial surface of said nozzle holder to thereby maintain a constant force for maintaining the opening pressure of said differential valve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |