US3995794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Super-short take off and landing apparatus
Assignee: Individual
•
Filing: 1975-06-24
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Granted: 1976-12-07
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Expires: 1995-06-24
Abstract
Abstract An aircraft provided with airfoils of the non-rotating type that are configured and arranged to provide greater lift while at the same time offering stable flight at ultra-low airspeeds. The airfoils are arranged as a biplane and consist of a fixed wing and a movable wing which are designed so as to permit a much steeper takeoff and landing angle as well as offering more efficient flight at higher speeds with greater inherent safety.
Inventors
- 👤 Edward M. Lanier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:07
CPC Classifications
B; B64; B64C; B64C15/00; B64C15/02; B64C39/00; B64C39/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
An aircraft having a fuselage and empennage with a fixed lower wing attached to said fuselage, an upper wing pivotally connected at its center of lift on spaced means carried by said fuselage and with said upper wing being disposed in spaced parallel relationship to said lower wing, power means carried by said upper wing for propelling said aircraft, and adjustable means carried by said fuselage in spaced relation to said spaced means and connected to said upper wing to unload lift and drag aerodynamically through a small minus and plus degrees movement of said upper wing about said center of lift to transfer major lift of said upper wing to said lower wing and reduce total drag of said upper wing for optimum cruise and high speed flight.
Claim 2
Dependent Claim
129 words
An aircraft having a fuselage and empennage with a fixed lower wing attached to said fuselage, an upper wing pivotally connected at its center of lift on spaced means carried by said fuselage and with said upper wing being disposed in spaced parallel relationship to said lower wing, power means carried by said upper wing for propelling said aircraft, and adjustable means carried by said fuselage in spaced relation to said spaced means and connected to said upper wing to unload lift and drag aerodynamically through a small minus and plus degrees movement of said upper wing about said center of lift to transfer major lift of said upper wing to said lower wing and reduce total drag of said upper wing for optimum cruise and high speed flight.
Claim 3
Dependent Claim
25 words
An aircraft as defined in claim 1 wherein said upper wing is provided with a plurality of nacelles with an engine mounted in each nacelle.
Claim 4
Dependent Claim
34 words
An aircraft as defined in claim 1 wherein said upper wing is formed with a deep chord and relatively large dihedral angles extending from the forward to the trailing edge of said upper wing.
Claim 5
Dependent Claim
35 words
An aircraft as defined in claim 1 wherein said spaced means comprising a pair of spaced upwardly inclined support members, said upper wing being pivotally connected at its center of lift to said support members.
Claim 6
Dependent Claim
45 words
An aircraft as defined in claim 2 wherein said engines are provided with contra-rotating propellers and said upper wing is provided with cross shafting and a central gear box to cause said propellers to continue to operate upon the failure of one of said engines.
Claim 7
Dependent Claim
44 words
An aircraft as defined in claim 4 wherein said adjustable means comprising an adjustable support member spaced from said pair of support members and connected to said upper wing adjacent the trailing edge for adjusting said upper wing with respect to said lower wing.
Claim 8
Dependent Claim
20 words
An aircraft as defined in claim 6 wherein said adjustable support member includes a fluid actuated piston and cylinder structure.
Claim 9
Dependent Claim
79 words
An aircraft as defined in claim 6 wherein said upper low aspect ratio wing is offset with respect to the fixed lower high aspect ratio wing and said upper wing is adjustable with respect to the lower wing to change the angle of attack of said upper wing while creating a trough or channel effect of accelerated air flowing from the movable upper wing to increase the lift of the lower wing upon take-off or landing of said aircraft.
Claim 10
Dependent Claim
32 words
An aircraft as defined in claim 6 wherein said adjustable support member permits said upper wing to automatically seek its minimum overall drag for top cruise and top speed of said aircraft.
Claim 11
Dependent Claim
41 words
An aircraft as defined in claim 6 wherein said upper wing is capable of floating within a comparatively small positive and negative degree angle relative to the fixed lower wing and automatically adjusts itself to minimum overall drag of the aircraft.
Claim 12
Dependent Claim
29 words
An aircraft as defined in claim 2 wherein said upper wing is provided with engine exhaust ducts at its trailing edge to increase lift and performance of said aircraft.
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) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |