Control means for jet aircraft thrust reversing means

Details Control means for jet aircraft thrust reversing means Control means for jet aircraft thrust reversing means

1974-10-30

1976-06-08

Blix, Trygve M.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Valve locking means

91445, 91448, 244110B, F15B 1316

Patent

active

039615600

ABSTRACT:
Control arrangement including an actuator, such as an air motor, for operating the jet deflector flaps of a thrust reverser, and a pilot valve and a control valve for operating the actuator. The pilot valve controls flow of high pressure air from the jet engine to the control valve. The air flows through a first port in the control valve to the actuator. Air leaving the actuator flows through a second port in the control valve and then back to the pilot valve through which it is exhausted. A pilot valve member initially limits air flow through the second port, but as the flaps are deployed, the second port is gradually opened and the first port gradually closed. The operation is reversed to retract the flaps. The pilot valve may be operated by a switch responsive to contact of the nosewheel of the aircraft with a runway. The pilot and control valve may be included in a single cylindrical body with their valve members rotatable about the axis of the body.

REFERENCES:
patent: 1998656 (1935-04-01), Bryan
patent: 3655134 (1972-04-01), Greenland et al.

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