Locking mechanism for sliding windows and doors
AssigneeAB Fixfabriken
InventorPer-Olof Lindqvist
Life of this patent
Estimating the term…
Abstract
A locking mechanism for a sash type window comprising two adjacent sashes arranged to slide one behind the other in a generally horizontal direction within an enclosing frame is disclosed. When the window is in its closed position, actuation of the locking mechanism causes the sashes to slide relative to one another in a direction away from each other to assure better sealing between the sashes and the enclosing window frame. In a preferred embodiment, the two sashes are also drawn towards each other in a direction perpendicular to the sliding direction in order to obtain better sealing between the sashes themselves. The locking mechanism may also be used on sliding doors.
Claims9
A locking mechanism for a window or a sliding door having a frame and a pair of adjacent sashes at least one of which is slidable behind the other with respect to said frame in movement directions, each of said pair of sashes having a meeting rail extending in an elongation direction, said meeting rails adapted to lie adjacent one another when said sashes are in a closed position, said locking mechanism comprising
- an engagement member connected to one of said meeting rails and moveable in an operating plane transverse to said movement directions, said engagement member having a curved end,
- a receiving element connected to the other one of said meeting rails, said receiving element having an inclined surface extending oblique to said movement directions and an engagement surface disposed transverse to said operating plane,
- a handle connected to said one of said meeting rails and moveable between a locked position and an unlocked position, and
- an operating mechanism including means for moving said curved end of said engagement member into engagement with said inclined surface of said receiving element responsive to movement of said handle from said unlocked position to said locked position, said operating plane, said inclined surface and said engagement surface being arranged so that, upon movement of said handle from said unlocked position to said locked position, said curved end of said engagement member first acts upon said inclined surface to displace said pair of sashes away from one another in opposite movement directions and then acts upon said engagement surface to draw said meeting rails toward one another in directions transverse to said movement directions.
A locking mechanism for a window or a sliding door having a frame and a pair of adjacent sashes at least one of which is slidable behind the other with respect to said frame in movement directions, each of said pair of sashes having a meeting rail extending in an elongation direction, said meeting rails adapted to lie adjacent one another when said sashes are in a closed position, said locking mechanism comprising
- an engagement member connected to one of said meeting rails and moveable in an operating plane transverse to said movement directions, said engagement member having an end,
- a receiving element connected to the other one of said meeting rails, said receiving element having an inclined surface extending oblique to said movement directions,
- a handle connected to said one of said meeting rails and moveable between a locked position and an unlocked position,
- an operating mechanism including means for moving said curved end of said engagement member into engagement with said inclined surface of said receiving element responsive to movement of said handle from said unlocked position to said locked position, said operating plane and said inclined surface of said receiving element being arranged so that, upon engagement of said engagement member with said inclined surface, said end of said engagement member acts upon said inclined surface to displace said pair of sashes away from one another in opposite movement directions, and
- blocking means for blocking the movement of said handle from said unlocked position to said locked position when at least one of said sashes is in an open position.
Dependencies are inferred from the claim text.