US3107071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical take-off and landing aircraft
Assignee: Individual
•
Filing: 1961-12-28
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Granted: 1963-10-15
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Wessel J O Wessels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025; B64C39/00; B64C39/001; B64C39/06; B64C39/062; B64C39/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A VERTICAL TAKE-OFF AND LANDING TYPE AIRCRAFT COMPRISING AT LEAST ONE STRUCTURE OF DOMED GENERALLY FLAT-BOTTOMED EXTERNAL CONFIGURATION HAVING THE CENTRAL UPPER REGION AND ON THE AXIS OF SYMMETRY OF SAID CONFIGURATION A RADIAL-FLOW AIR FAN, SAID STRUCTURE HAVING AN OPENING COAXIAL WITH SAID CONFIGURATION FORMING AN INTAKE FOR SAID FAN AXIALLY THROUGH SAID OPENING ABOVE SAID FAN, AN ANNULAR DUCT IN SAID STRUCTURE FOR THE AIR FLOW CENTRIFUGALLY FROM SAID FAN, SAID DUCT HAVING A LOWER CONVEX AND AN UPPER CONVES SURFACE, SAID DUCT BEING CENTERED ON SAID AXIS AND CURVES SMOOTHLY AND CONVERGENTLY OUTWARDLY AND DOWNWARDLY THROUGH SUBSTANTIALLY A RIGHT ANGLE TO TERMINATE AS AN ANNULAR DISCHARGE OPENING IN THE NEIGHBORHOOD OF THE BOTTOM OF SAID STRUCTURE AND SAID LOWER DUCT SURFACE HAVING A RAISED FRONTAL EDGE PRESENTED TO THE OUTFLOW FROM SAID FAN AND A STEADILY DECREASING CURVATURE FROM SUCH EDGE TO SAID DISCHARGE OPENING.
Claim 2
Dependent Claim
148 words
A VERTICAL TAKE-OFF AND LANDING TYPE AIRCRAFT COMPRISING AT LEAST ONE STRUCTURE OF DOMED GENERALLY FLAT-BOTTOMED EXTERNAL CONFIGURATION HAVING THE CENTRAL UPPER REGION AND ON THE AXIS OF SYMMETRY OF SAID CONFIGURATION A RADIAL-FLOW AIR FAN, SAID STRUCTURE HAVING AN OPENING COAXIAL WITH SAID CONFIGURATION FORMING AN INTAKE FOR SAID FAN AXIALLY THROUGH SAID OPENING ABOVE SAID FAN, AN ANNULAR DUCT IN SAID STRUCTURE FOR THE AIR FLOW CENTRIFUGALLY FROM SAID FAN, SAID DUCT HAVING A LOWER CONVEX AND AN UPPER CONVES SURFACE, SAID DUCT BEING CENTERED ON SAID AXIS AND CURVES SMOOTHLY AND CONVERGENTLY OUTWARDLY AND DOWNWARDLY THROUGH SUBSTANTIALLY A RIGHT ANGLE TO TERMINATE AS AN ANNULAR DISCHARGE OPENING IN THE NEIGHBORHOOD OF THE BOTTOM OF SAID STRUCTURE AND SAID LOWER DUCT SURFACE HAVING A RAISED FRONTAL EDGE PRESENTED TO THE OUTFLOW FROM SAID FAN AND A STEADILY DECREASING CURVATURE FROM SUCH EDGE TO SAID DISCHARGE OPENING.
References Cited (Backward Citations)
GB191215735A
Cited
US2944762A
Cited
US2945642A
Cited
US2996266A
Cited
US3073551A
Cited
US3042129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |