Patent ID: 6460294
Filing Date: 2002-10-08
Classification: E05D,E05F,E05Y

Abstract:
An opening and closing mechanism for a window or door comprising an elongate frame member, first and second pivot mount members coupled to the frame member towards opposite ends thereof and at least one of the first and second pivot mount members being slidable along the frame member so that the first and second pivot mount members are movable relative to one another, a lever arm having one end pivotally coupled to the first pivot mount member to enable pivotal movement thereof relative to the frame member between a closed position where the lever arm is substantially parallel to the frame member and an open position where the lever arm is transverse to the frame member, a connecting arm having one end pivotally coupled to the second pivot mount member and the other end pivotally coupled at an intermediate portion of the lever arm, an opening cord or cable portion which is coupled to one or both of the first and second-pivot mount members for applying a force therebetween to effect relative movement of the first and second pivot mount members toward each other along the frame member for opening of the window or door, a closing cord or cable portion which is coupled between the connecting arm or lever-arm and the frame member for applying a force therebetween to effect relative angular movement of the lever arm and connecting arm toward the frame member for closing of the window or door, and a winding mechanism for winding and unwinding the opening and closing cord or cable portions to apply said forces for opening and closing of the window or door.