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US 2014/0026709 A1Published application
Winder assembly
AssigneeMighton Products Limited
InventorMichael Derham
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AssigneeMighton Products Limited
InventorMichael Derham
Estimating the term…
The present invention provides a locking unit 3 which is arranged to be fitted to existing casement window winding mechanisms. The winder assembly 1 comprises a winding mechanism 2 which is arranged to move the casement window outwardly or inwardly. In particular, the winder assembly 1 comprises a handle 48 which is rotated by a user in a first direction to open the window and in a second direction to close the window. The present invention provides a restrictor for restricting the opening of the casement window beyond a predetermined distance. In particular, the present invention is arranged to enable a user to wind the handle 48 until the casement window reaches the predetermined distance. The restrictor is automatically reset once the casement window is moved back or towards the closed position such that the casement window is within the predetermined restricted initial opening distance.
A locking unit for installation to a window winder wherein the window winder comprises a rotatable handle such that rotation of the handle in a first or second rotational direction causes a corresponding movement of an actuating member in a first opening direction or a second closing direction, the actuating member being connectable to a window in order to move a window from a closed position to an open position, the locking unit comprising:
A method of installing a locking unit to a window winder wherein the window winder comprises a rotatable handle such that rotation of the handle in a first or second rotational direction causes a corresponding movement of an actuating member in a first opening direction or a second closing direction, the actuating member being connectable to a window in order to move a window from a closed position to an open position, the method comprising removing a handle of the window winder to expose a handle spindle, engaging a locking spindle of the locking unit to the window winder, wherein the locking unit comprises the locking spindle and a locking member, wherein, when the window is moving in an opening direction and the window locates at a predetermined partially open position, the locking member, in the locked position, prevents rotation of the locking spindle which prevents rotation of a handle spindle in the opening direction and prevents the further movement of the actuating member in the opening direction.
Dependencies are inferred from the claim text.