US 7,555,889 B2
	Chopper knife for a straw chopper
Rico Priesnitz, Lebach (Germany); and Peter Veit, Battweiler (Germany)
Assigned to Deere & Company, Moline, Ill. (US)
Filed on May 13, 2004, as Appl. No. 10/845,682.
Claims priority of application No. 103 22 337 (DE), filed on May 17, 2003; and application No. 103 32 363 (DE), filed on Jul. 17, 2003.
Prior Publication US 2005/0016630 A1, Jan. 27, 2005
Int. Cl. A01D 34/42 (2006.01)

U.S. Cl. 56—504

17 Claims

1. A chopper knife for a straw chopper, the chopper knife having a center plane and two side faces defining two cutting edges, the cutting edges comprise two faces that are both arranged at an angle relative to the side faces, and where the faces of each cutting edge are asymmetric, characterized by the fact that the cross section of the chopper knife is mirror-symmetric relative to the center plane of the chopper knife in the region of the cutting edges.