Knife bank assembly of a counter knife assembly of an integral chopper assembly of a combine harvester

A chopper assembly of a combine comprising a counter knife assembly including a grate portion extending between concave pan side walls and having slots therethrough through which knife elements of an underlying knife bank assembly may project to chop crop residue passing thereby through the chopper assembly, the counter knife assembly further including a shaft member that extends between journalled mountings at the concave pan side walls to which a knife bank is mounted, said knife bank assembly further comprising

• an elongated bracket member extending generally beneath the grate portion,
• a plurality of knife elements operatively connected to said bracket member at spaced locations therealong, the spacings between knife elements corresponding to spacings between slots of the grate portion,
• said knife elements dimensioned to be insertable to extend through the slots in the grate portion,
• said elongated bracket member having a mounting portion along a side thereof through which the shaft member of the counter knife assembly can pass and along which the bracket member may slide side-to-side when mounted thereto,
• said bracket member slidable by a user along the shaft member to align said knife elements with the slots in the grate portion, wherein said bracket member includes a plurality of retainment mounts secured to said bracket member at spaced locations therealong, each retainment mount having at least one knife element removably mounted thereto, wherein said knife elements that are removably mounted to said at least one retainment mount each have a base portion with two spaced mounting holes across the width of said base portion,
• said at least one retainment mount includes generally flat sides with a mounting hole extending between said generally flat sides generally transverse to said flat sides and a mounting slot extending between said generally flat sides generally transverse to said flat sides, the distance between said mounting hole and said mounting slot corresponding to the distance between said two said two spaced mounting holes of said base portion of said knife elements,
• said knife bank assembly includes a first connection construction extending through said mounting hole and one of said mounting holes in said base portion of each of said knife elements removably mounted to such retainment mount to define a pivot axis for such knife elements,
• said knife bank assembly includes a second connection construction extending through said mounting slot and the other of said mounting holes in said base portion of each of such knife elements to exert a clamping force to clamp such knife elements in an extended position,
• each of such knife elements having a first edge defined as the leading edge thereof upstream of said mounting hole and a second edge defined as the trailing edge downstream of said mounting slot,
• whereby application of a force to said leading edge of one of such knife elements sufficient to overcome said clamping force will effect rotation of the knife element to which such force is applied about said pivot axis to a displaced position.