US3790103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating fin
Assignee: United States Department of the Navy
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Filing: 1972-08-21
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Granted: 1974-02-05
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Expires: 1992-08-21
Abstract
Abstract A rotatable sleeve with attached clipped double delta shaped fins for mounting on a missile body so that the fins may achieve a position of symmetry with respect to incident air flow thereon without spinning-up.
Inventors
- 👤 J Peoples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:49
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/02; F42B10/04; F42B10/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
180 words
A device for obviating induced roll coupling in a guided missile comprising: a missile having a generally elongated cylindrical body member for providing stablized flight; a plurality of fins mounted to freely revolve transversally in either direction to the longitudinal axis of said missile for allowing said fins to move during said missile flight; said fins being streamline shaped members having a base aligned parallel with the longitudinal axis of said missile body, leading and trailing edges inclined with respect to said base, a tip of shorter axial dimension than said base dimension and spaced a substantial distance from said base forming a symmetrical member for aligning itself in the air stream; and bearing means positioned on the circumference of said missile body and having a portion fixably secured to said base for holding said fins in spaced relationship to one another around the circumference of said missile body; whereby the fins rotate with respect to said missile body to seek a null position during flight of the missile and rotate to maintain this null position during missile turning maneuvers.
Claim 2
Independent Claim
180 words
A device for obviating induced roll coupling in a guided missile comprising: a missile having a generally elongated cylindrical body member for providing stablized flight; a plurality of fins mounted to freely revolve transversally in either direction to the longitudinal axis of said missile for allowing said fins to move during said missile flight; said fins being streamline shaped members having a base aligned parallel with the longitudinal axis of said missile body, leading and trailing edges inclined with respect to said base, a tip of shorter axial dimension than said base dimension and spaced a substantial distance from said base forming a symmetrical member for aligning itself in the air stream; and bearing means positioned on the circumference of said missile body and having a portion fixably secured to said base for holding said fins in spaced relationship to one another around the circumference of said missile body; whereby the fins rotate with respect to said missile body to seek a null position during flight of the missile and rotate to maintain this null position during missile turning maneuvers.
Claim 3
Dependent Claim
53 words
The device of claim 1 wherein the profile of said fin is tapered from said base to said tip and having a front portion tapered towards said leading edge from a plane perpendicular to said base and extending through the corner formed by the meeting of said leading edge and said tip edge.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |