Patent US3678692A successfully refreshed from Google Patents.
US3678692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsation power unit
Assignee: DORNIER AG
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Filing: 1970-09-14
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Granted: 1972-07-25
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Expires: 1990-09-14
Abstract
Abstract This invention relates to an improvement in a pulsation power unit comprising an inlet, valve means, injection means, a combustion chamber and a combustion cowl, the improvement comprising additional cowl means of larger diameter at the end of the combustion cowl, said additional cowl means having a variable gas outlet cross-section.
Inventors
- 👤 Georg Heise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:50
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/02; F02K7/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
In a pulsation power unit comprising an inlet, valve means, injection means, combustion chamber and combustion cowl, the improvement which comprises additional cowl means of larger diameter at the end of the combustion cowl, step means between the combustion cowl and the additional cowl means, the crosssectional surface of the additional cowl means having at least double the amount of the cross-sectional surface of the combustion cowl, the length of the additional cowl means being approximately one-third the length of the combustion cowl, and the additional cowl means having a variable gas outlet crosssection.
Claim 2
Dependent Claim
94 words
In a pulsation power unit comprising an inlet, valve means, injection means, combustion chamber and combustion cowl, the improvement which comprises additional cowl means of larger diameter at the end of the combustion cowl, step means between the combustion cowl and the additional cowl means, the crosssectional surface of the additional cowl means having at least double the amount of the cross-sectional surface of the combustion cowl, the length of the additional cowl means being approximately one-third the length of the combustion cowl, and the additional cowl means having a variable gas outlet crosssection.
Claim 3
Dependent Claim
25 words
A power unit according to claim 1 includiNg a displacing means for a jet needle positioned between the combustion cowls of the double cowl arrangement.
Claim 4
Dependent Claim
24 words
A power unit according to claim 2 including displacing means for a jet needle positioned between the combustion cowls of the double cowl arrangement.
Claim 5
Dependent Claim
17 words
A power unit according to claim 2 having a single air inlet and a single gas outlet.
Claim 6
Dependent Claim
30 words
A power unit according to claim 1 including axially displaceable jet needle means mounted in the outlet of the additional cowl means for purposes of varying the gas outlet cross-section.
Claim 7
Dependent Claim
26 words
A power unit according to claim 1 in which the surface extension of the outlet of the additional cowl means corresponds approximately to a spherical zone.
Claim 8
Dependent Claim
20 words
A power unit according to claim 1 in which the additional cowl means and the air inlet have elliptical cross-sections.
Claim 9
Dependent Claim
23 words
A power unit according to claim 1 including a displacing mechanism for a jet needle positioned between the combustion cowl and a fairing.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |