Patent ID: 8230644

Claim:
A hinge unit for window units ( 1 ), the window units ( 1 ) comprising a fixed frame ( 2 ) and a sash ( 3 ) capable of rotation and translation between a window unit ( 1 ) closed position and an open position; a hinge unit ( 4 ) being inserted on each opposite side of the window unit between the fixed frame ( 2 ) and the sash ( 3 ), each hinge unit ( 4 ) comprising at least: a supporting element ( 5 ) integral with the fixed frame ( 2 ) and having an upper end; an arm ( 6 ), one end of which pivots at the sash ( 3 ); a first slide ( 7 ) slidably positioned along the supporting element ( 5 ) and forming a movable connecting point (F 1 ); connecting rod means ( 8 , 9 ) for connecting the first slide ( 7 ) to the arm ( 6 ), being designed to allow rotation and translation of the arm ( 6 ) away from and towards the supporting element ( 5 ); a joint rod ( 10 ) pivotally connected to the arm ( 6 ) and pivotally connected to a second slide ( 13 ) which is slidable along the supporting element ( 5 ), wherein a pin is attached to and extends from the supporting element ( 5 ), the pin having a cam wheel which is located in a through-hole ( 14 ) in the second slide ( 13 ), the cam wheel being rotatable within the through-hole so that, when the cam wheel is rotated from a first position to a second position, the second slide ( 13 ) is moved towards the upper end of the supporting element ( 5 ), and when the cam wheel is rotated from the second position to a third position, the second slide ( 13 ) is moved away from the upper end of the supporting element ( 5 ).