Linear no-back device

摘要

A linear no-back device for transmitting bi-directional linear motion from an input shaft to an output shaft while preventing motion of the output shaft independently of the input shaft and enabling movement of the input shaft when the output shaft is jammed. The linear no-back device has a fixed member having a bore with a pair of spring discs loosely mounted on the output shaft and having flexible ears at the periphery thereof in engagement with a wall of the bore. A pair of spaced-apart stop rings on the output shaft limit separating movement of the spring discs axially of the output shaft and a preloaded compression coil spring urges the spring discs away from each other. Actuating members associated with the input shaft are effective upon movement of the input shaft in either linear direction to effectively disengage the spring discs from the wall of the bore and transmit motion of the input shaft to the output shaft through a motion-transmitting connection including the preloaded compression coil spring. Further compression of the preloaded compression coil spring enables movement of the input shaft relative to the output shaft when the latter is jammed.