US3586267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement in and relating to aircraft
Assignee: Sundberg Alf M M I
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Filing: 1968-12-17
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Granted: 1971-06-22
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Expires: 1988-12-17
Abstract
Abstract A device for regulating the setting angle of a control surface such as a flap or rudder on an aircraft comprising an inflatable bag located between the control surface and the fuselage. Air for inflating the bag is drawn from outside the aircraft at a location where increased pressure due to dynamic pressure of the passing airstream is available. The control surface and the bag may be provided with coinciding openings therein, and a secondary flap is mounted on the control surface immediately behind said openings as viewed in the direction of the airstream. The secondary flap when raised from the control surface creates a pressure rise at the openings, thus pressurizing the openings and thereby also the interior of the bag leading to actuation of the main control surface in servo fashion.
Inventors
- 👤 Alf Martin M Ingelman-Sundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:22
CPC Classifications
B; B64; B64C; B64C9/00; B64C9/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
In an aircraft having a control surface swingable relative to the aircraft to control the attitude of the aircraft and a flexible actuator bag disposed between a portion of the aircraft and the control surface to swing the control surface; the improvement in which the control surface has an opening therethrough that registers with an opening through the actuator bag to provide communication between the interior of the actuator bag and the air stream flowing over the control surface, a regulator flap pivotally mounted on the control surface behind the opening in the control surface with respect to the direction of the air stream, and means for swinging said regulator flap relative to said control surface.
Claim 2
Dependent Claim
116 words
In an aircraft having a control surface swingable relative to the aircraft to control the attitude of the aircraft and a flexible actuator bag disposed between a portion of the aircraft and the control surface to swing the control surface; the improvement in which the control surface has an opening therethrough that registers with an opening through the actuator bag to provide communication between the interior of the actuator bag and the air stream flowing over the control surface, a regulator flap pivotally mounted on the control surface behind the opening in the control surface with respect to the direction of the air stream, and means for swinging said regulator flap relative to said control surface.
Claim 3
Dependent Claim
27 words
Apparatus as claimed in claim 1, and an actuator bag between said regulator flap and said control surface, and means for selectively inflating the last-named actuator bag.
Claim 4
Dependent Claim
73 words
Apparatus as claimed in claim 2, said means for selectively inflating the regulator flap actuator bag comprising an opening through said regulator flap registering with an opening through said reguLator flap actuator bag to provide communication between the interior of the last-named bag and the air flowing over said regulator flap, a second regulator flap pivotally mounted behind the opening in the first-named regulator flap, and means for selectively swinging said second flap.
Claim 5
Dependent Claim
28 words
Apparatus as claimed in claim 3, said means for selectively swinging said second flap comprising a second regulator flap actuator bag mounted between said first and second flaps.
Claim 6
Dependent Claim
106 words
In an aircraft having a control surface swingable relative to the aircraft to control the attitude of the aircraft and a flexible actuator bag disposed between a portion of the aircraft and the control surface to swing the control surface; the improvement in which the interior of said bag communicates through an opening with the air stream flowing over said control surface, a regulator flap pivotally mounted behind said opening with respect to the direction of the air stream, a regulator flap actuator bag mounted on the side of said regulator flap opposite the air stream, and means for selectively inflating the regulator flap actuator bag.
Claim 7
Dependent Claim
106 words
In an aircraft having a control surface swingable relative to the aircraft to control the attitude of the aircraft and a flexible actuator bag disposed between a portion of the aircraft and the control surface to swing the control surface; the improvement in which the interior of said bag communicates through an opening with the air stream flowing over said control surface, a regulator flap pivotally mounted behind said opening with respect to the direction of the air stream, a regulator flap actuator bag mounted on the side of said regulator flap opposite the air stream, and means for selectively inflating the regulator flap actuator bag.
Claim 8
Dependent Claim
46 words
Apparatus as claimed in claim 5, said opening being disposed in a surface of the aircraft separate from said flap and control surface so that air flow creates a pressure in said opening in dependence on the angle of attack or yaw of said aircraft surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |