US3653151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airfoil structure
Assignee: Individual
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Filing: 1970-10-13
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Granted: 1972-04-04
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Expires: 1990-10-13
Abstract
Abstract An airfoil is provided by distorting a relatively stiff piece of a solid material. One starts with an elongated thin, stiff material and forms a gore in the trailing surface and then at least partially closes the gore. This distorts the thin material into a stable, airfoil configuration.
Inventors
- 👤 Andre J M Laurent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:58
CPC Classifications
A; A63; A63H; A63H27/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
An airfoil structure comprising a generally elongate, thin, stiff material having bilateral symmetry and an elongate leading edge and an elongate trailing edge; a V-shaped gore in the center of the trailing edge with the apex of the V extending toward the leading edge but terminating short of the leading edge; and means for readily opening and closing the gore to distort the airfoil into a stable, self-supporting airfoil shape, said means enabling the characteristics of the airfoil to be readily altered.
Claim 2
Dependent Claim
82 words
An airfoil structure comprising a generally elongate, thin, stiff material having bilateral symmetry and an elongate leading edge and an elongate trailing edge; a V-shaped gore in the center of the trailing edge with the apex of the V extending toward the leading edge but terminating short of the leading edge; and means for readily opening and closing the gore to distort the airfoil into a stable, self-supporting airfoil shape, said means enabling the characteristics of the airfoil to be readily altered.
Claim 3
Dependent Claim
35 words
An airfoil structure as in claim 1, wherein said means comprises an adjustable turnbuckle fastened at opposite ends thereof to opposing facing edges of said gore to adjust the spacing between said opposing facing edges.
Claim 4
Dependent Claim
90 words
An airfoil structure comprising a generally elongate, thin, stiff material having bilateral symmetry and a leading edge and a trailing edge; a V-shaped gore cut in the center of the trailing edge with the apex of the V pointing toward and terminating short of the leading edge and having opposing facing spaced edges; and an adjustable turnbuckle connected at its opposite ends to the opposing facing edges of said V-shaped gore to selectively vary the spacing between said spaced edges to distort the wing into different, stable, self-supporting airfoil shapes.
Claim 5
Dependent Claim
90 words
An airfoil structure comprising a generally elongate, thin, stiff material having bilateral symmetry and a leading edge and a trailing edge; a V-shaped gore cut in the center of the trailing edge with the apex of the V pointing toward and terminating short of the leading edge and having opposing facing spaced edges; and an adjustable turnbuckle connected at its opposite ends to the opposing facing edges of said V-shaped gore to selectively vary the spacing between said spaced edges to distort the wing into different, stable, self-supporting airfoil shapes.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |