Concealed hinge for a pivoting window or pivoting door and window equipped therewith

A hinge for a pivoting window (1) or a pivoting door with a frame (2) and a leaf (3) that can tilt with respect to the frame (2), wherein the hinge (6) comprises:

• a frame part (7) configured to be fastened to the frame (2) and a leaf part (8) configured to be fastened to the leaf (3), with a scissor mechanism (9) between the frame part (7) and the leaf part (8) on which the leaf part (8) is hingeably affixed around an axis of rotation (X-X′), whereby the scissor mechanism (9) is such that in a first phase of the tilting movement of the leaf (3) the scissor mechanism (9) comes into operation, so that the axis of rotation (X-X′) moves in a direction essentially transverse to a plane of the frame (2) into a locking position whereby the axis of rotation (X-X′) is at a distance from the frame (2) such that the axis of rotation (X-X′) is a fixed axis around which the leaf (3) can tilt further in a second phase of the tilting movement of the leaf (2),
• wherein the scissor mechanism (9) comprises two arms (10a, 10b) that are connected together by a pin and a groove connection (11), whereby the groove (11a) has an arched shape and the pin (11b) has a corresponding curved form that is movable in the groove (11a), whereby one of the two arms (10a) has a fixed hinge point (12) on the frame part (7) and has an end (13) that is movably held in a groove (14) of the leaf part (8) whereby an other arm (10b) has a fixed hinge point (19) on the leaf part (8) coaxial with the axis of rotation (X-X′) and movably held in a slip hole (20) in the frame part (7).