Patent ID: 7946633

Claim:
A casement lock, comprising: a sliding tie bar having a roller pin mounted on said tie bar, said roller pin for engagement with and disengagement from a keeper for placing the casement lock in a locked position and an unlocked position; said roller pin including an inner pin having a middle portion, a first end and a second end wherein: the middle portion of the inner pin is substantially cylindrical and defines a first axis of rotation; the first end of the inner pin includes a mounting pin pivotally connected to tie bar, the mounting pin defining a second axis of rotation offset from the first axis of rotation, wherein the mounting pin is rotatable about the second axis; and the second end of the inner pin is enlarged relative to the middle portion and includes an upper surface defining a substantially circular outer perimeter and a recessed opening formed within said outer perimeter shaped to be engaged by a tool for rotating the inner pin around the second axis of rotation relative to the tie bar to reposition the middle portion of the inner pin relative to the tie bar, the recessed opening allowing the tool to engage the upper surface of the inner pin and rotate the inner pin around the second axis of rotation without engaging an exterior edge of the upper surface of the inner pin; and said roller pin including a substantially cylindrical outer roller mounted on the inner pin, wherein the outer roller is rotatable about the first axis of rotation, the outer roller having an outer bearing surface, and an outwardly extending perimetrical flange at one end thereof, the perimetrical flange having a substantially circular outer perimeter, the outer roller having an upper surface with a recessed depression formed therein, the recessed depression being shaped to receive the enlarged second end of the inner pin and position the upper surface of the second end of the inner pin at or below the upper surface of the outer roller, the outer roller being rotatably held between the enlarged second end of the inner pin and the tie bar, the perimetrical flange acting to retain the keeper between the tie bar and the perimetrical flange and the perimetrical flange rotating with the outer roller to reduce friction between the roller pin and the keeper during engagement.