Today in 1967, US Patent 3327612 A was issued, an invention of Conrad Lenz, for his “Apparatus for Use in Brewing.” There’s no Abstract, although in the description it includes this summary:

This invention relates, in general, to brewing apparatus and, in particular, to a new and useful mashing device comprising a unit consisting of a tank for receiving the soaked malt, a feed grinder for the soaked malt and a conveyor for moving the crushed material from the outlet of the feed grinder to a brewing pan or mash copper and of means actuated by the emptying of the unit of the mashed material to discontinue the driving mechanisms.