The blue input shaft rotates two directions but the transmission is possible only for one. The pink shaft moves longitudinally when the input shaft reverses because of axial component of gear force in the helical gear drive.
The mechanism should be used only for low speed because of gear collision.
STEP files of this video:
http://www.mediafire.com/download/e55yjowmp4cs8zu/OneWayClutch7STEP.zip
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