Various patents on the John Deere chopper

Yield measurement: Below is the link to a patent that describes the yield measurement in the forage harvester using torque measurement on the accelerator:


Intake auger: Here is the patent for the intake auger of the current Kemper pick-up with these specially shaped coil ends:


A flap in the drum housing intended to eject a stone that has been drawn in (position 43 on the drawing):


The lateral arrangement of the blower of the old 5000 series:


In this application from 1975, the V-shaped arrangement of the cutting tools on the cutterhead is claimed with the aim of transfering the forage as centered as possible: