US3567133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure adjusting means for fuel injection nozzles
Assignee: Ambac Industries Inc
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Filing: 1968-06-25
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Granted: 1971-03-02
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Expires: 1988-06-25
Abstract
Abstract A fuel injection nozzle assembly comprising an elongated holder, a nozzle mounted at one axial end of the holder, a valve element mounted in an axial bore in the nozzle, means defining a spring chamber in said nozzle assembly for mounting therein a compression spring normally biasing the valve element to a closed position, pressure-adjusting means for said spring for selectively regulating the pressure at which the valve opens comprising an adjusting screw member mounted in a threaded axial bore in the holder engaging one end of said compression spring and a locking screw member engaging in a threaded opening extending transversely of said threaded axial bore adapted to engage said adjusting screw to lock the same in a predetermined adjusted position.
Inventors
- 👤 Walter J Gewinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:47
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/20; F02M61/205
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
A fuel nozzle assembly comprising an elongated holder, a nozzle mounted at one axial end of said holder, a valve element mounted in an axial bore in said nozzle, means defining a spring chamber in said nozzle assembly for mounting therein a compression spring assembly in direct engagement with said valve element to normally bias said valve element to a closed position, pressure-adjusting means for said spring assembly for selectively regulating the pressure at which said valve opens consisting of an adjusting screw member mounted in a threaded axial bore in the holder directly engaging one end of said compression spring assembly and a locking screw member engaging in a threaded opening extending transversely of said threaded axial bore adapted to engage a beveled outer circumferentially extending edge of said adjusting screw member to lock the same in a predetermined adjusted position, said adjusting screw member being hollow and said holder having an opening in said sidewall for access to said adjusting screw member and for venting leakage fuel from said spring chamber.
Claim 2
Dependent Claim
173 words
A fuel nozzle assembly comprising an elongated holder, a nozzle mounted at one axial end of said holder, a valve element mounted in an axial bore in said nozzle, means defining a spring chamber in said nozzle assembly for mounting therein a compression spring assembly in direct engagement with said valve element to normally bias said valve element to a closed position, pressure-adjusting means for said spring assembly for selectively regulating the pressure at which said valve opens consisting of an adjusting screw member mounted in a threaded axial bore in the holder directly engaging one end of said compression spring assembly and a locking screw member engaging in a threaded opening extending transversely of said threaded axial bore adapted to engage a beveled outer circumferentially extending edge of said adjusting screw member to lock the same in a predetermined adjusted position, said adjusting screw member being hollow and said holder having an opening in said sidewall for access to said adjusting screw member and for venting leakage fuel from said spring chamber.
Claim 3
Dependent Claim
23 words
A fuel injection nozzle assembly as claimed in claim 1 wherein said spring chamber extends from said one axial end of the holder.
Claim 4
Dependent Claim
30 words
A fuel injection nozzle assembly as claimed in claim 1 wherein said locking screw member has a conical tip adapted to engage a beveled edge of said adjusting screw member.
Claim 5
Dependent Claim
41 words
A fuel injection nozzle assembly as claimed in claim 1 wherein said compression spring assembly includes a compression spring and upper and lower spring seats at opposite axial ends of said spring engaging the adjusting screw member and valve element respectively.
Claim 6
Dependent Claim
34 words
A fuel injection nozzle assembly as claimed in claim 1 wherein said adjusting screw member has hexagonal-shaped recesses at opposite axial ends to permit adjustment thereof by means of a ball end screw driver.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |