Concealed hinge for door or window in building may have two pivots connected together by rod and incorporates arcuate guide mechanism

摘要

The concealed hinge (10) for a door or a window may have two pivots connected together by a rod. It incorporates an arcuate guide mechanism (20) with grooves (34) and flat surfaces (22). The guide mechanism extends between the fixed frame (12) and the movable frame (16). The guide mechanism may be made up of several segments fitted together and defines the effective pivot point (D) of the hinge.