Patent US3777977A successfully refreshed from Google Patents.
US3777977A
Expired / Lapsed
US
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Injection device
Assignee: Automobiles Peugeot SA
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Filing: 1972-06-26
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Granted: 1973-12-11
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Expires: 1992-06-26
Abstract
Abstract Injection device in which a first chamber, located at the pointed end of the injector needle and partly defined by the seat for the end of the needle, permanently communicates with a source of fuel under pressure, such as the fuel injection pump. A second chamber into which the rear end portion of the needle extends is put in communication by a distributor valve alternately with said source of fuel and with an enclosure in which a substantially lower pressure prevails, such as a pressure in the neighborhood of atmospheric pressure.
Inventors
- 👤 M Regneault
- 👤 Perret J Levallois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:04
CPC Classifications
F; F02; F02M; F02M47/00; F02M47/02; F02M47/027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
356 words
An injection device comprising an injector carrier, means defining an injector carried by the carrier, an injector needle having a pointed end portion and slidably mounted in the injector, means defining a seat in the injector for the pointed end portion of the needle, a first chamber in the injector in the vicinity of the pointed end portion of the needle and partly defined by the seat, means defining a second chamber, the needle having a rear end portion opposed to the pointed end portion and extending into the second chamber and having a surface partly defining the second chamber, passage means for permanently connecting the first chamber to a source of fuel under pressure, means defining an enclosure in which prevails a pressure which is substantially lower than the pressure of said source of fuel, a distributor valve comprising means defining a body, means defining a bore in the body, a closing member slidable in the bore, means for subjecting opposite ends of the closing member to the same pressure force, two opposite sealing faces on the closing member, two opposed seats on the body for co-operation with the sealing faces, electromagnetic means combined with the closing member for shifting the closing member in the body between a position in which a first of said faces sealingly engages a first of said seats and a position in which a second of said faces sealingly engages a second of said seats, the closing member defining with the body a third chamber when said first face and first seat are in engagement, the closing member defining with the body a fourth chamber when said second face and second seat are in engagement, a fifth chamber in the body capable of communicating with the third chamber and fourth chamber when the first face and first seat and the second face and second seat are respectively separated from each other, passage means putting the third chamber in communication with said enclosure, passage means putting the fourth chamber in communication with said source of fuel under pressure and passage means putting the fifth chamber in communication with said second chamber.
Claim 2
Dependent Claim
356 words
An injection device comprising an injector carrier, means defining an injector carried by the carrier, an injector needle having a pointed end portion and slidably mounted in the injector, means defining a seat in the injector for the pointed end portion of the needle, a first chamber in the injector in the vicinity of the pointed end portion of the needle and partly defined by the seat, means defining a second chamber, the needle having a rear end portion opposed to the pointed end portion and extending into the second chamber and having a surface partly defining the second chamber, passage means for permanently connecting the first chamber to a source of fuel under pressure, means defining an enclosure in which prevails a pressure which is substantially lower than the pressure of said source of fuel, a distributor valve comprising means defining a body, means defining a bore in the body, a closing member slidable in the bore, means for subjecting opposite ends of the closing member to the same pressure force, two opposite sealing faces on the closing member, two opposed seats on the body for co-operation with the sealing faces, electromagnetic means combined with the closing member for shifting the closing member in the body between a position in which a first of said faces sealingly engages a first of said seats and a position in which a second of said faces sealingly engages a second of said seats, the closing member defining with the body a third chamber when said first face and first seat are in engagement, the closing member defining with the body a fourth chamber when said second face and second seat are in engagement, a fifth chamber in the body capable of communicating with the third chamber and fourth chamber when the first face and first seat and the second face and second seat are respectively separated from each other, passage means putting the third chamber in communication with said enclosure, passage means putting the fourth chamber in communication with said source of fuel under pressure and passage means putting the fifth chamber in communication with said second chamber.
Claim 3
Dependent Claim
34 words
A device as claimed in claim 1, wherein the closing member has two guiding portions at opposite ends of the closing member and slidable in said bore, said sealing faces and seats being annular.
Claim 4
Dependent Claim
15 words
A device as claimed in claim 1, wherein said sealing faces and seats are frustoconical.
Claim 5
Dependent Claim
189 words
An injection device comprising an injector carrier, means defining an injector carried by the carrier, an injector needle having a pointed end portion and slidably mounted in the injector, means defining a seat in the injector for the pointed end portion of the needle, a first chamber in the injector in the vicinity of the pointed end portion of the needle and partly defined by the seat, means defining a second chamber, the needle having a rear end portion opposed to the pointed end portion and extending into the second chamber and having a surface partly defining the second chamber, passage means for permanently connecting the first chamber to a source of fuel under pressure, means defining an enclosure in which prevails a pressure which is substantially lower than the pressure of said source of fuel, a distributing valve, passage means connecting the second chamber to the distributing valve which is capable of putting the second chamber in communication alternately with said source of fuel under pressure and with the enclosure, the distributing valve comprising a balanced double closing member and electromagnet means for shifting the double closing member.
Claim 6
Dependent Claim
189 words
An injection device comprising an injector carrier, means defining an injector carried by the carrier, an injector needle having a pointed end portion and slidably mounted in the injector, means defining a seat in the injector for the pointed end portion of the needle, a first chamber in the injector in the vicinity of the pointed end portion of the needle and partly defined by the seat, means defining a second chamber, the needle having a rear end portion opposed to the pointed end portion and extending into the second chamber and having a surface partly defining the second chamber, passage means for permanently connecting the first chamber to a source of fuel under pressure, means defining an enclosure in which prevails a pressure which is substantially lower than the pressure of said source of fuel, a distributing valve, passage means connecting the second chamber to the distributing valve which is capable of putting the second chamber in communication alternately with said source of fuel under pressure and with the enclosure, the distributing valve comprising a balanced double closing member and electromagnet means for shifting the double closing member.
Claim 7
Dependent Claim
21 words
An injection device as claimed in claim 4, wherein said pressure in the enclosure is in the neighborhood of atmospheric pressure.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |