Anti-theft device for e.g. wheel of bicycle, has nut/bolt screwed/tightened when bicycle is in vertical position by supporting on wheels and rotated in two directions when bicycle is in turned position by supporting on seat post/handle bar

摘要

The device has a cover nut (9) or bolt provided with a rack notch (16), and a support washer (10) equipped with a projection (14). Guiding channels receive pins (11). The nut or bolt is screwed or tightened by prohibiting unscrewing or loosening when a bicycle is in vertical position by supporting on wheels. The screw or nut is freely rotated in two directions when the bicycle is in turned position by supporting on a seat post or a handle bar. Joints (12, 13) are positioned on each side of the rack notch.