Patent · US Expired

Chopper arrangement

US6688971B2 · kind B2 · utility

8Cited by

2References

7Claims

0Family size

Assignee

Deere & Company · US

Inventors

Martin Buermann · Gundelfingen an der Donau, DE
Walter Hirsch · Bettendorf, US
Adolf Belter · Dresden, DE
Gerd Bernhardt · Daun, DE
Siegfried Firus · Dresden, DE
Andre Heinrich · Kitzscher, DE

Key dates

Filing date	Dec 6, 2001
Grant date	Feb 10, 2004
Priority date	—
Expiry date	Dec 6, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S460/901
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A chopper arrangement for a harvesting machine comprises a body that is rotated in a predominantly vertical axis of rotation. The body is provided with a plurality of radially extending knives that are axially distributed along the body. The knives have radially outer ends that are arranged in a conical shape. In this way the knives at the first end having a smallest radial extension are rotated at a slower circumferential speed than knives having a larger radial extension.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.