Patent US2799549A successfully refreshed from Google Patents.
Patent US3605412A successfully refreshed from Google Patents.
US3605412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid cooled thrust nozzle for a rocket
Assignee: Bolkow GmbH
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Filing: 1968-07-09
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Granted: 1971-09-20
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Expires: 1988-07-09
Abstract
Abstract A FLUID COOLED COMBUSTION CHAMBER FOR A ROCKET ENGINE IS COMPOSED OF WALLS FORMING A LONGITUDINALLY EXTENDING CONVERGENT-DIVERGENT THRUST NOZZLE HAVING A NECK PORTION AT ITS NARROWEST SECTION. A RADIALLY INNER ROW AND A RADIALLY OUTER ROW OF COOLING DUCTS ENCIRCLE THE INTERIOR SURFACE OF THE THRUST NOZZLE AT ITS NECK PORTION WITH THE DUCTS EXTENDING LONGITUDINALLY INTO THE CONVERGENT AND DIVERGENT PORTIONS. THE OUTLET END OF THE INNER ROW OF COOLING DUCTS MAY BE ARRANGED TO DIRECT COOLANT FLUID INTO THE THRUST NOZZLE WITH MEANS PROVIDING A TWIST TO THE FLUID AS IT ENTERS THE NOZZLE.
Inventors
- 👤 Karl Stockel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:18
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/97; F02K9/972
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |