Weed seed destruction

US10004176B2 · kind B2 · utility

Inventor

• Dean Mayerle · Saskatoon, CA

Key dates

• Filing date: Jul 13, 2016
• Grant date: Jun 26, 2018
• Expiry date: Jul 13, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01F12/48
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Weed seeds are destroyed in the chaff from a combine harvester by repeated high speed impacts caused by a rotor mounted in one of a pair of side by side housings which accelerate the discarded seeds in a direction centrifugally away from the rotor onto a stator including angularly adjustable stator surfaces around the axis. Thus the discarded seeds rebound back and forth between the rotor and the stator to provide a plurality of impacts. The seeds are carried axially of the rotor by a controlled airstream so that they move to an axial discharge location where a discharge fan is mounted. The angle of the discharge around the rotor axis can be changed to direct the seeds to the side of the combine away from a straw chopper, towards the guide fins of the tailboard of the chopper, or into the housing of the straw chopper.