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US 8,146,858 B2Granted
No-back device having malfunction detection
AssigneeGoodrich Actuation Systems Limited
InventorsIsabelle Port-Robach, Raphael Medina
Life of this patent
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AssigneeGoodrich Actuation Systems Limited
InventorsIsabelle Port-Robach, Raphael Medina
Estimating the term…
The invention relates to a no-back device for a mobile element actuating device including a screw shaft having first and second braking means each comprising a ratchet wheel. These ratchet wheels are mounted opposite one another so that the first braking means are adapted to resist an unwanted movement of the screw shaft in a first direction, and the second braking means are adapted to resist an unwanted movement of the screw shaft in an opposite direction. The no-back device also includes means for detecting the state of the rotation of the ratchet wheels and indicating means for furnishing, according to the state of the rotation of the wheels, an indication concerning the operating state of the no-back device.
A no-back device for an actuating device for a mobile actuating element with a screw type actuating shaft, the no-back device comprising:
A method for determining an operational state of a no-back device for an actuating device for a mobile element in an aircraft, which has a screw type actuating shaft, where the no-back device includes first (3, 5, 7, 9, 11, 15 19) and second (4, 6, 8, 10, 12, 16, 18) brakes, each of which has a ratchet wheel (5, 6), the ratchet wheels mounted in opposition to each other with the first brake designed to resist an unwanted movement of the shaft in a first direction, and the second brake designed to resist an unwanted movement of the shaft in an opposite direction, the method comprising:
Dependencies are inferred from the claim text.