| 摘要 |
A compact, lightweight, polymeric injection molded handcuff has a strap with a distal free end and a substantially rectangular head. The strap has knife grabbing features that include a plurality of hillocks with valleys therebetween. The strap head has an aperture surrounded by a deformable frame carrying an integrally molded slanted knife with a sharp knife-edge. The strap's distal end is inserted into the head's aperture and a ring is inserted half way therealong to form two loops for inserting a prisoner's hands therethrough. When the distal end of the strap is pulled to tighten the handcuff, the knife-edge rides the hillocks, which interfere therewith owing to deformation of the head's rectangular portion. Upon clearing the hillocks, the knife comes to rest in one of the valleys, thereby securing the prisoner. Attempts by the prisoner to release the handcuff dig the slanted knife-edge into an adjacent hillock, locking the handcuff.
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