Patent ID: 8893461

Claim:
A knife/counter knife assembly for a sugar cane harvesting machine comprising: a counter knife configured to attach to a rotating disc of the sugar cane harvesting machine between two transverse guides of the rotating disc, the counter knife comprising two longitudinal, parallel, vertical walls on opposite lateral edges of the counter knife, the walls defining a cavity therebetween, wherein each wall is a single continuous wall that runs the longitudinal length of the counter knife, and wherein the walls are configured to rigidly laterally support a knife within the cavity; and the knife comprising: a first cutting end and a second cutting end; a first cutting side and a second cutting side; and a first hole and a second hole, both the first hole and the second hole being located along the longitudinal axis of the knife and generally equidistant from the first cutting side and the second cutting side; wherein the first hole is located closer to the first cutting end than the second hole, and the second hole is located closer to the second cutting end than the first hole; and the knife is configured to attach to the counter knife using only a single bolt through one of the first hole and the second hole.