Patent ID: 7424811
Filing Date: 2008-09-16
Classification: E05B,Y10T

Abstract:
1. Handcuffs for preventing double-locking, each comprising: a pair of first and second semi-circular stationary hoops that are integrally formed with generally rectangular bodies and are separated from each other by a predetermined interval by means of a spacing member on one side of each handcuff; a semi-circular swivel hoop that is coupled to ends of the first and second stationary hoops so as to pivot about a pivot pin, and is provided with a ratchet having a plurality of teeth on an outer surface thereof on the other side of each handcuff; a detent and a stopper, which are interposed between the bodies of the first and second stationary hoops, have a travel passage along which the swivel hoop can travel, and function to lock and unlock the swivel hoop; a spring that resiliently holds the detent and the stopper against each other; means for preventing double-locking, which causes the stopper to be locked to the bodies of the first and second stationary hoops while the stopper is in resilient contact with the bodies of the first and second stationary hoops; and means for moving the stopper in one direction by forcibly releasing the double-locking preventing means.