Patent ID: 8141893

Claim:
A folding apparatus for a bicycle frame comprising: a bicycle frame, at least one engaging device assembled on the bicycle frame, the bicycle frame including at least one first tube and at least one second tube connected to the at least one first tube, each of the at least one engaging device comprising: a stationary sleeve disposed on the second tube of the bicycle frame, the stationary sleeve having a series of second tooth annularly formed thereon and extending downwardly therefrom; a rotary sleeve fixed to the first tube of the bicycle frame, the rotary sleeve pivotally rotatably mounted on the second tube and located below the stationary sleeve, the rotary sleeve having a series of first tooth annularly formed thereon and extending upwardly therefrom for correspondingly engaging with the second tooth on the stationary sleeve; and a locking device movably mounted on the second tube and located below the rotary sleeve for securely retaining the rotary sleeve firmly engaging with the stationary sleeve; wherein when the locking device is released and the rotary sleeve moves downwardly to disengage with the stationary sleeve, the rotary sleeve and the first tube are able to pivotally rotate relative to the second tube such that the bicycle frame is folded.