Patent ID: 7316136
Filing Date: 2008-01-08
Classification: E05B,Y10T

Abstract:
1. In a handcuff assembly for use in a pair of handcuffs wherein each handcuff assembly comprises a bow pivotally connected to and between cheek plates of a cheek plate assembly that also includes a base frame containing a lock mechanism, the improvement residing in said base frame having an open top, a bottom wall, opposite end walls, and opposite flat side walls with a plastic overmold disposed over an outer surface of the opposite flat sidewalls and a keyway having a circular portion receiving a shaft of a key and a notch extending outwards from the circular portion receiving a tooth of the key, the keyway extending through the at least one flat side wall and overmold, the overmold having an outwardly projecting, curved bevel extending transversely around the circular portion and notch where the curved bevel is defined by a smooth, curved transition without steps or ledges between an entrance end of the keyway where the outwardly projecting, curved bevel merges with an outside surface of the overmold on a first end of the bevel and an inside surface of the keyway on an opposing end of the bevel and where the bevel around the circular portion provides a first alignment mechanism for locating the key opening with the key and the bevel around the notch provides a secondary alignment mechanism where the key is subsequently rotated to obtain final alignment and entry of the key into the keyway.