Patent ID: 8683746

Claim:
An awning window unit, the window unit ( 1 ) comprising at least: a fixed frame ( 2 ) having a pair of vertical members or stiles ( 2 a , 2 b ), parallel with each other, and a pair of horizontal members or rails ( 2 c ) parallel with each other; a movable frame ( 3 ) having a pair of vertical members or stiles ( 3 a , 3 b ), parallel with each other, and a pair of horizontal members or rails ( 3 c ), parallel with each other, and being connected to the fixed frame ( 2 ) by a pair of hinged members ( 4 , 5 ) joined to respective members of the fixed frame ( 2 ) and of the movable frame ( 3 ) so as to allow the movable frame ( 3 ) to move between a closed position, where the fixed frame ( 2 ) and the movable frame ( 3 ) are in contact with each other, and an open position where at least one lower rail ( 3 c ) of the movable frame ( 3 ) is at a certain distance from the respective lower rail ( 2 c ) of the fixed frame ( 2 ) towards the outside of a room where the window unit ( 1 ) is installed, at least one movement arm ( 7 ) configured to move the movable frame ( 3 ) from the closed position to the open position, and vice versa; elements ( 8 ) for stably closing or locking or releasing the movable frame ( 3 ) closed position on the fixed frame ( 2 ), located on, and acting between, the fixed frame ( 2 ) and the movable frame ( 3 ), the window unit being characterized in that it comprises: at least one operating slide ( 9 ) located and movable within the lower rail ( 2 c ) in order to slidably support the elements ( 8 ) located on the fixed frame ( 2 ); an operating kinematic pair ( 13 , 14 ) connecting the slide ( 9 ) to a first end of the movement arm ( 7 ), the arm ( 7 ) being articulated, at the other end, to the lower rail ( 3 c ) of the movable frame ( 3 ); a control handle ( 10 ) associated with the outside of the lower rail ( 2 c ) and connected to the slide ( 9 ) in order to move the slide, when actuated manually to predetermined positions, to allow, in sequence, first the movable frame ( 3 ) to be released from the fixed frame ( 2 ) and then the movable frame ( 3 ) to be moved towards the open position, and vice versa, and wherein the kinematic pair ( 13 , 14 ) comprises a variable-pitch rack ( 13 ) which is formed on a portion of the slide ( 9 ); the rack ( 13 ) acting in conjunction with a variable pitch pinion ( 14 ) to which an end of the movement arm ( 7 ) of the movable frame ( 3 ) is articulated; the rack ( 13 ) and the pinion ( 14 ) having surfaces which can mesh to generate the sequential movements for movable frame ( 3 ) opening and closing by rotation of the movement arm ( 7 ).