Patent ID: 6314681
Filing Date: 2001-11-13
Classification: E05D,E05F,E05Y

Abstract:
A window operator comprising:a mounting base;an elongate threaded member mounted on the mounting base;a drive mechanism to apply a rotational movement to the elongate threaded member;a threaded element located on the elongate threaded member and adapted to be movable between a first position which corresponds to a window sash driven by the window operator being in a closed position, and a second position which corresponds to the window sash being in a fully open position;a drive arm pivotally coupled to the threaded element;a first link pivotally coupled to the drive arm;a first link coupling for coupling the first link to the window sash;a second link mounted to pivot about a fixed point adjacent to the threaded element;a second link coupling for coupling the second link to the window sash; anda coupling link pivotally coupled to the drive arm and the second link.