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Patent US5050819A successfully refreshed from Google Patents.
US5050819A
Expired / Lapsed
US
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Rotatable non-circular forebody flow controller
Assignee: National Aeronautics and Space Administration
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Filing: 1990-08-10
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Granted: 1991-09-24
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Expires: 2010-08-10
Abstract
Abstract The invention is a rotatable, non-circular forebody flow controller. The apparatus comprises a small geometric device located at a nose of a forebody of an aircraft or missile. The geometric device has a circular base that fits flush upon the remaining forebody of the aircraft and a non-circular cross-sectional area that extends toward the apex of the aircraft. The device is symmetrical about a reference plane and preferably attaches to an axle which in turn attaches to a rotating motor. The motor rotates the device about an axis of rotation. Preferably, a control unit connected to an aircraft flight control computer signals to the rotating motor the proper rotational positioning of the geometric device.
Inventors
- 👤 Cary A. Moskovitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:27
CPC Classifications
B; B64; B64C; B64C23/00; B64C23/06; B64C19/00; B64C21/00; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
An apparatus for controlling yawing moment of an aircraft having a forebody with a circular cross-section and an apex, the apparatus comprising: a rotatable, geometric device having a circular base, the circular base of the geometric device fitting flush upon the circular cross-section of the forebody of the aircraft, the geometric device having a plurality of non-circular cross-sections that extend from the circular base thereof to the apex of the aircraft.
Claim 2
Independent Claim
71 words
An apparatus for controlling yawing moment of an aircraft having a forebody with a circular cross-section and an apex, the apparatus comprising: a rotatable, geometric device having a circular base, the circular base of the geometric device fitting flush upon the circular cross-section of the forebody of the aircraft, the geometric device having a plurality of non-circular cross-sections that extend from the circular base thereof to the apex of the aircraft.
Claim 3
Dependent Claim
22 words
An apparatus according to claim 1, wherein the plurality of non-circular cross-sections of the geometric device are symmetrical about a reference plane.
Claim 4
Dependent Claim
43 words
An apparatus according to claim 1, further comprising: a connecting means and a rotating means, the connecting means rotatably connecting the geometric device to the rotating means, and the rotating means providing for rotation of the geometric device about an axis of rotation.
Claim 5
Dependent Claim
28 words
An apparatus according to claim 3, further comprising: a control means, the control means driving the rotating means such that the geometric device rotates into a predetermined position.
Claim 6
Dependent Claim
19 words
An apparatus according to claim 4, wherein the control means connects to a flight control computer in the aircraft.
Claim 7
Dependent Claim
36 words
An apparatus according to claim 3, wherein the plurality of non-circular cross-sections of the geometric device are symmetrical about a reference plane, and the axis of rotation of the geometric device lies in said reference plane.
Claim 8
Dependent Claim
28 words
An apparatus according to claim 6, further comprising: a control means, the control means driving the rotating means such that the geometric device rotates into a predetermined position.
Claim 9
Dependent Claim
20 words
An apparatus according to claim 6, wherein the plurality of non-circular cross-sections of the geometric device are elliptical in shape.
Claim 10
Dependent Claim
28 words
An apparatus according to claim 8, further comprising: a control means, the control means driving the rotating means such that the geometric device rotates into a predetermined position.
Claim 11
Dependent Claim
19 words
An apparatus according to claim 9, wherein the rotating means rotates the geometric device within a range of ±45°.
Claim 12
Dependent Claim
30 words
An apparatus according to claim 10, wherein the geometric device has a length equal to or less than three percent of the total length of the forebody of the aircraft.
Claim 13
Dependent Claim
28 words
An apparatus according to claim 9, wherein the plurality of elliptical cross-sections of the geometric device have a width-to-height ratio that is greater than or equal to two.
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) | 1994-09-23 | 1995-03-25 | 1995-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-23 | 1999-03-25 | 1999-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-23 | 2003-03-25 | 2003-09-24 | $7700.00 | Window Closed / Lapsed |