Patent US3443757A successfully refreshed from Google Patents.
US3443757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supersonic fluid flow exhaust nozzles
Assignee: AVIAT UK
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Filing: 1966-10-14
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Granted: 1969-05-13
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Expires: 1986-10-14
Abstract
No abstract record available.
Inventors
- 👤 Lionel Henry Townend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:10
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/46; F02K1/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
AN EXHAUST NOZZLE OF THE CONVERGENT-DIVERGENT DUCT TYPE FOR FLUID FLOW AT SUPERSONIC EXHAUST SPEEDS COMPRISING, A CONVERGENT INLET REGION, A DIVERGENT EXHAUST REGION, A THROAT REGION INTERMEDIATE SAID CONVERGENT AND DIVERGENT REGIONS, SAID NOZZLE HAVING A PLURALITY OF LOBES WHICH EXTEND LONGITUDINALLY TO THE EXIT REGION OF THE NOZZLE FROM THE REGION OF THE THROAT AND BEING AXISYMMETRIC FORWARD OF SAID LOBES; THE AREA OF THE LOBED EXIT WHEN MEASURED AS A PROJECTION ON A PLANE NORMAL TO THE AXIS OF SYMMETRY BEING IDEALLY THE SAME AS THE THEORETICAL EXIT AREA OF A SUPERSONIC FLOW EXHAUST NOZZLE HAVING THE REQUIRED EXIT MASS FLOW, BOTH NOZZLES HAVING THE SAME EXIT MACH NUMBER AND VELOCITY, AND THE GENERATION OF THE INNER SURFACES OF THE LOBES BEING BASED ON SUPERSONIC FLOW THEORY.
Claim 2
Dependent Claim
130 words
AN EXHAUST NOZZLE OF THE CONVERGENT-DIVERGENT DUCT TYPE FOR FLUID FLOW AT SUPERSONIC EXHAUST SPEEDS COMPRISING, A CONVERGENT INLET REGION, A DIVERGENT EXHAUST REGION, A THROAT REGION INTERMEDIATE SAID CONVERGENT AND DIVERGENT REGIONS, SAID NOZZLE HAVING A PLURALITY OF LOBES WHICH EXTEND LONGITUDINALLY TO THE EXIT REGION OF THE NOZZLE FROM THE REGION OF THE THROAT AND BEING AXISYMMETRIC FORWARD OF SAID LOBES; THE AREA OF THE LOBED EXIT WHEN MEASURED AS A PROJECTION ON A PLANE NORMAL TO THE AXIS OF SYMMETRY BEING IDEALLY THE SAME AS THE THEORETICAL EXIT AREA OF A SUPERSONIC FLOW EXHAUST NOZZLE HAVING THE REQUIRED EXIT MASS FLOW, BOTH NOZZLES HAVING THE SAME EXIT MACH NUMBER AND VELOCITY, AND THE GENERATION OF THE INNER SURFACES OF THE LOBES BEING BASED ON SUPERSONIC FLOW THEORY.
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) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |