Threshing machinery concave arrangements

US6958012B2 · kind B2 · utility

Assignee

• CNH AMERICA LLC · US

Inventors

• Frank R. G. Duquesne · Zwevegem, BE
• Marc R. M. Jonckheere · Snellegem, BE
• Christiaan A. C. Lippens · Sint-Laureins, BE
• Dirk J. Desnijder · Evergem, BE
• Thierry Devriese · Sint-Andries, BE

Key dates

• Filing date: Jun 19, 2003
• Grant date: Oct 25, 2005
• Expiry date: Dec 20, 2023

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01F12/28
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A concave arrangement is disclosed for a threshing machine such as a combine harvester 10. The arrangement includes a concave 30 having a moveable rear portion 48 that is adapted to vary the break-over angle presented to straw passing downstream. A flap member 54 is provided that moves jointly with the moveable rear portion 48 and ensures that a gap G between the moveable portion 48 and a later processing stage such as a beater apparatus is kept substantially closed. Variation of the break-over angle influences the length of the straw leaving the threshing machine and the loading of the further separation and cleaning mechanisms.