US3685612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas ejection device with a silencer feature
Assignee: Bertin Technologies SAS
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Filing: 1971-05-03
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Granted: 1972-08-22
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Expires: 1991-05-03
Abstract
Abstract An ejection system comprises a flat fishtail nozzle opening into a flat fairing open at both ends to form therewith a static pump or ejector. The nozzle is subdivided into a succession of elementary nozzles producing a laminar jet of hot gases, and the fairing is likewise subdivided into as many separate juxtaposed elementary ducts as there are elementary nozzles. Each such elementary nozzle is associated with a respective elementary duct to form therewith an elementary static pump.
Inventors
- 👤 Jean Henri Bertin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:25
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/20; F02; F02K; F02K1/00; F02K1/36; F02K1/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
An ejection device comprising a source of hot gases, a flat fishtail nozzle supplied with hot gas from said source and subdivided into a succession of elementary nozzles designed to produce a laminar hot gaseous jet, and a flat fairing opEn at both ends and accommodating therein said fishtail nozzle, said fairing being likewise to said fishtail nozzle subdivided into as many separate juxtaposed elementary ducts as there are elementary nozzles, each elementary nozzle and respective elementary duct forming together an elementary static pump.
Claim 2
Dependent Claim
84 words
An ejection device comprising a source of hot gases, a flat fishtail nozzle supplied with hot gas from said source and subdivided into a succession of elementary nozzles designed to produce a laminar hot gaseous jet, and a flat fairing opEn at both ends and accommodating therein said fishtail nozzle, said fairing being likewise to said fishtail nozzle subdivided into as many separate juxtaposed elementary ducts as there are elementary nozzles, each elementary nozzle and respective elementary duct forming together an elementary static pump.
Claim 3
Dependent Claim
26 words
A device according to claim 1 wherein the elementary nozzles are cruciform and eject the hot gases in thin lamina at right angles to one another.
Claim 4
Dependent Claim
14 words
A device according to claim 1 wherein the elementary ducts are of rectangular cross-section.
Claim 5
Dependent Claim
23 words
A device according to claim 1 wherein the fairing is divided into compartments by sound-damping partitions which serve to bound the elementary ducts.
Claim 6
Dependent Claim
36 words
A device according to claim 1 wherein the fairing is double-walled and comprises a continuous outer wall and a perforate inner wall bounding a convergent-divergent channel, the fishtail nozzle extending to the throat of the channel.
Claim 7
Dependent Claim
19 words
A device according to claim 5 wherein the space between the two fairing walls is filled with sound-damping material.
Claim 8
Dependent Claim
42 words
A device according to claim 5 wherein the space between the two fairing walls is empty and acts as a resonator, the diameter of the apertures in the perforate wall being determined in dependence upon the predominant frequency of exhaust gas noise.
Claim 9
Dependent Claim
26 words
A device according to claim 1 further comprising control flaps fitted at the exit of the fairing and articulated transversely of the spread of the stream.
Claim 10
Dependent Claim
25 words
A device according to claim 8 wherein the flaps are subdivided into elementary flaps each associated with one of the elementary ducts of the fairing.
References Cited (Backward Citations)
US1357079A
Cited
DE441932C
Cited
FR657569A
Cited
FR725510A
Cited
FR859758A
Cited
FR865279A
Cited
US2396208A
Cited
US3527318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |