Chopper knife for a straw chopper

US7555889B2 · kind B2 · utility

Assignee

• Deere & Company · US

Inventors

• Rico Priesnitz · Lebach, DE
• Peter Veit · Schneeberg, DE

Key dates

• Filing date: May 13, 2004
• Grant date: Jul 7, 2009
• Expiry date: May 20, 2027

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01F12/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A chopper knife for a straw chopper has two side faces defining cutting edges. Each cutting edge is made up of two asymmetrical ground faces. The side faces are arranged at an angle with respect to the side faces. The cross section of the chopper knife in the region of the cutting edges is mirror-symmetric to the center plane of the chopper knife.