Patent US3810449A successfully refreshed from Google Patents.
US3810449A
Expired / Lapsed
US
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Electromagnetic fuel injectors
Assignee: FINANC ET IND DES ATELIERS SOC
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Filing: 1972-06-19
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Granted: 1974-05-14
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Expires: 1992-06-19
Abstract
Abstract In an electromagnetic fuel injector the armatures are unstuck by inducing into the magnet a neutralizing field.
Inventors
- 👤 M Chollet
- 👤 F Denmat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:39
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/3005; H; H01; H01F; H01F13/00; H01F7/00; H01F7/06; H01F7/08; H01F7/18; H01F7/1805; H01F7/1811; F02D41/20; F02D2041/2068; F02D2041/2079
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
170 words
Apparatus for accelerating unsticking of stationary and moving electromagnet armatures in an electromagnetic injector, comprising: an injector control signal generator; an electromagnet having a main winding for receiving signals from said signal generator, and an auxiliary winding for receiving opposing signals; a computer connected to said signal generator for outputting square or rectangular signals to the main winding; an amplifier connected between said computer and said main winding; means for supplying the auxiliary winding with an opposing signal immediately upon cessation of a control signal from said signal generator, said means comprising: means for shunting the trailing edge of a control signal from said computer, a first monostable connected to said shunting means for producing a square or rectangular signal of a required length, a second monostable in series with said first monostable for adjusting the start of the square or rectangular signal produced by said first monostable, and an amplifier connected between said monostables and the auxiliary winding for transmitting a square or rectangular signal to said auxiliary winding.
Claim 2
Dependent Claim
170 words
Apparatus for accelerating unsticking of stationary and moving electromagnet armatures in an electromagnetic injector, comprising: an injector control signal generator; an electromagnet having a main winding for receiving signals from said signal generator, and an auxiliary winding for receiving opposing signals; a computer connected to said signal generator for outputting square or rectangular signals to the main winding; an amplifier connected between said computer and said main winding; means for supplying the auxiliary winding with an opposing signal immediately upon cessation of a control signal from said signal generator, said means comprising: means for shunting the trailing edge of a control signal from said computer, a first monostable connected to said shunting means for producing a square or rectangular signal of a required length, a second monostable in series with said first monostable for adjusting the start of the square or rectangular signal produced by said first monostable, and an amplifier connected between said monostables and the auxiliary winding for transmitting a square or rectangular signal to said auxiliary winding.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein said windings have different directions, but are otherwise identical.
References Cited (Backward Citations)
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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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |