Various patents on the New Holland-chopper

New Holland was the first manufacturer to integrate a metal detector and a corresponding sequencer into its forage harvesters to protect the chopper units.

Here is the related patent from 1973:


The automatic adjustment of the shearbar, which is now standard in all forage harvesters, was originally a New Holland invention. Here is the corresponding patent from 1987:


This application is about a screen that is intended to prevent the cooler fan from sucking feed dust or corn juice emerging from the cracker into the cooler: