Patent 7971418 was granted and assigned to DEERE & COMPANY on July, 2011 by the United States Patent and Trademark Office.
A header for an agricultural harvester has left side and right side endless belt conveyors and a central conveyor for carrying crop to a central aperture in the header and an extendible and retractable cutter bar assembly disposed immediately in front of the leading edges of the conveyors that can be extended and retracted in the direction of travel through an agricultural field.