US3715093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auto-advance throttle control
Assignee: McDonnell Douglas Corp
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Filing: 1971-12-27
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Granted: 1973-02-06
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Expires: 1991-12-27
Abstract
Abstract A system compensating for sudden and unexpected loss of thrust resulting from engine failure in a short takeoff and landing (STOL) aircraft in a high angle of attack attitude, such as in the landing mode, by advancing the throttle of an adjacent engine on the same side of the longitudinal centerline of the aircraft as the faulty engine. An overcenter actuating mechanism combines amplification of a small signal source with rapid rate of response. The small signal force results from comparison of adjacent engine selected parameters.
Inventors
- 👤 Dyke R Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:21
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/15
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
180 words
An auto-advance throttle control to increase the thrust of one of a pair of engines on the same side of the longitudinal centerline of an aircraft when the other of said pair has a sudden and unexpected loss in thrust and said aircraft is in a high angle of attack mode, said control comprising: sensor device means continuously sensing an engine parameter indicative of engine thrust level, comparing said parameter with that of an adjacent engine providing lift augmentation for the same area of the aircraft, responsive means responsive to an abnormal differential between the sensed parameters of said engines to compensate for loss of thrust of one of said engines by advancing the throttle of an adjacent engine, said sensor device means including an actuator operable to initiate said responsive means, said responsive means including overcenter linkage having an overcenter position and an actuating position, said actuator being operable to move said linkage to said actuating position, and connection means operable by said linkage in said actuating position to increase thrust of said one of a pair of engines.
Claim 2
Dependent Claim
180 words
An auto-advance throttle control to increase the thrust of one of a pair of engines on the same side of the longitudinal centerline of an aircraft when the other of said pair has a sudden and unexpected loss in thrust and said aircraft is in a high angle of attack mode, said control comprising: sensor device means continuously sensing an engine parameter indicative of engine thrust level, comparing said parameter with that of an adjacent engine providing lift augmentation for the same area of the aircraft, responsive means responsive to an abnormal differential between the sensed parameters of said engines to compensate for loss of thrust of one of said engines by advancing the throttle of an adjacent engine, said sensor device means including an actuator operable to initiate said responsive means, said responsive means including overcenter linkage having an overcenter position and an actuating position, said actuator being operable to move said linkage to said actuating position, and connection means operable by said linkage in said actuating position to increase thrust of said one of a pair of engines.
Claim 3
Dependent Claim
180 words
An auto-advance throttle control to increase the thrust of one of a pair of engines on the same side of the longitudinal centerline of an aircraft when the other of said pair has a sudden and unexpected loss in thrust and said aircraft is in a high angle of attack mode, said control comprising: sensor device means continuously sensing an engine parameter indicative of engine thrust level, comparing said parameter with that of an adjacent engine providing lift augmentation for the same area of the aircraft, responsive means responsive to an abnormal differential between the sensed parameters of said engines to compensate for loss of thrust of one of said engines by advancing the throttle of an adjacent engine, said sensor device means including an actuator operable to initiate said responsive means, said responsive means including overcenter linkage having an overcenter position and an actuating position, said actuator being operable to move said linkage to said actuating position, and connection means operable by said linkage in said actuating position to increase thrust of said one of a pair of engines.
Claim 4
Dependent Claim
180 words
An auto-advance throttle control to increase the thrust of one of a pair of engines on the same side of the longitudinal centerline of an aircraft when the other of said pair has a sudden and unexpected loss in thrust and said aircraft is in a high angle of attack mode, said control comprising: sensor device means continuously sensing an engine parameter indicative of engine thrust level, comparing said parameter with that of an adjacent engine providing lift augmentation for the same area of the aircraft, responsive means responsive to an abnormal differential between the sensed parameters of said engines to compensate for loss of thrust of one of said engines by advancing the throttle of an adjacent engine, said sensor device means including an actuator operable to initiate said responsive means, said responsive means including overcenter linkage having an overcenter position and an actuating position, said actuator being operable to move said linkage to said actuating position, and connection means operable by said linkage in said actuating position to increase thrust of said one of a pair of engines.
Claim 5
Dependent Claim
24 words
An auto-advance throttle control as in claim 1 wherein said responsive means operates only when flaps on said aircraft are in their landing mode.
Claim 6
Dependent Claim
23 words
An auto-advance throttle control as in claim 2 wherein latching means maintains said overcenter linkage in overcenter position until said flaps are lowered.
Claim 7
Dependent Claim
29 words
An auto-advance throttle control as in claim 1 wherein said connection means also causes movement of the pilot''s throttle control lever to indicate an engine problem to the pilot.
Claim 8
Dependent Claim
23 words
An auto-advance throttle control as in claim 1 wherein said actuator is a plunger operable to move said linkage from its overcenter position.
Claim 9
Dependent Claim
48 words
An auto-advance throttle control as in claim 1 wherein said connection means includes an actuator driver arm pivotally mounted and pivotally connected to one end of said overcenter linkage, and biAs means for rotating said driver arm when said overcenter linkage has been moved to said actuating position.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |