Patent ID: 7013604

Claim:
A window operator for controlling the opening and closing movement of a window sash relative to a window frame, the window operator comprising a mounting arrangement for coupling to a sill of said window frame, an elongate threaded member mounted with the mounting arrangement, a first side jam, a second side jam and a top piece, a drive mechanism to apply a rotational movement to the elongate threaded member, a threaded element located on the elongate threaded member, a hinge by which the window sash is hingedly mountable to the window frame, said hinge being connected to the mounting arrangement whereby the hinge is mountable to said element of the window frame, the window operator further comprising a coupling device connected to and moveable in response to movement of the threaded element on the elongate threaded member, the coupling device being further connected to a part of the hinge wherein movement of the coupling device applies a moving force to said part of the hinge.