LOCK-BLOCKER FOR WINDOWS Russian patent published in 2019 - IPC E05C17/46 

FIELD: construction.

SUBSTANCE: invention relates to window fittings, in particular, to interlocking devices. Window blocker comprises housing (1), in which there are central (2) and mounting holes (30), movable lever (4) consisting of locking (5) and cylindrical parts (6). On cylindrical part (6) there are grooves (7) and circular groove (8) located radially. Moving lever (4) enters central hole (2) of housing (1) and is fixed along axis by washer (9) and rests against blind hole (10) of cover (11). Cover (11) is provided with lodgments (12) and lug (13) for installation of retainer (14) with spring (15), as well as mounting holes (16). When movable lever (4) is turned, the grooves of cylindrical part (7) enter rounded recess (17) of retainer (14), and main surface (18) of cylindrical part (6) is engaged with rectangular cutout (19) of retainer (14) and is pressed by spring (15), which provides automatic fixation of movable lever (4) in selected position.

EFFECT: technical problem of invention consists in simplification of design, improvement of reliability and ease of use, provision of automatic fixation of lever position, use with different types and designs of windows, while maintaining possibility of opening in ventilating position.

1 cl, 13 dwg