US4389999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic check valve and diesel fuel injector
Assignee: Boeing North American Inc
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Filing: 1982-05-17
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Granted: 1983-06-28
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Expires: 2002-05-17
Abstract
Abstract An ultrasonic diesel fuel injector comprises an injector body including a means for flowing fuel through the injector body, a check valve located within the means for flowing fuel, and a means for ultrasonically vibrating the check valve.
Inventors
- 👤 Vance W. Jaqua
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:17
CPC Classifications
F; F02; F02M; F02M51/00; F02M51/06; F02M51/0603; F02M51/061; F02M69/00; F02M69/04; F02M69/041; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
An ultrasonic fuel injector suitable for use in a diesel, comprising: an injector body, conduit means for allowing a flow of fuel to pass through said injector body, and a check valve comprising a valve seat at a point along said conduit means, a check valve head engageable with said valve seat to close-off said conduit means, said check valve head being moveable to a disengaged position with respect to said valve seat, biasing means for urging said check valve head to return to engagement with said valve seat after passage of said flow of fuel, means for connecting said check valve body to said biasing means and means for applying ultrasonic vibration to said check valve head through said connecting means while said check valve head is in said disengaged position, so that said flow of fuel is atomized.
Claim 2
Dependent Claim
140 words
An ultrasonic fuel injector suitable for use in a diesel, comprising: an injector body, conduit means for allowing a flow of fuel to pass through said injector body, and a check valve comprising a valve seat at a point along said conduit means, a check valve head engageable with said valve seat to close-off said conduit means, said check valve head being moveable to a disengaged position with respect to said valve seat, biasing means for urging said check valve head to return to engagement with said valve seat after passage of said flow of fuel, means for connecting said check valve body to said biasing means and means for applying ultrasonic vibration to said check valve head through said connecting means while said check valve head is in said disengaged position, so that said flow of fuel is atomized.
Claim 3
Dependent Claim
14 words
The ultrasonic injector of claim 1 wherein said check valve comprises a poppet valve.
Claim 4
Dependent Claim
14 words
The ultrasonic injector of claim 1 wherein said check valve comprises a pintle valve.
Claim 5
Dependent Claim
78 words
A fuel injector as claimed in claim 1 wherein said connecting means comprises a stud and a magnetostrictive shaft member, said magnetostrictive shaft member being connected at one end to said stud and at the opposite end to said check valve head, said biasing means comprises a spring acting between said injector body and said stud, and said means for applying ultrasonic vibration comprises a drive coil in proximity to said magnetostrictive shaft member of said connecting means.
Claim 6
Dependent Claim
51 words
A fuel injector as claimed in claim 1 wherein said connecting means is a member comprising a stud, a shaft connected to said check valve head and a piezoelectric element between said stud and said shaft, said means for applying ultrasonic vibration to said check valve head comprising said piezoelectric element.
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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) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |