Today in 2010, US Patent 7735413 B2 was issued, an invention of Klaus-Karl Wasmuht and Kurt Stippler, assigned to Krones AG, for their “Method And Device For Brewing Beer.” Here’s the Abstract:
A device for brewing beer, particularly a wort pan (1), with a container body (2) to receive a wort reservoir (3), the device containing an internal boiler (4) arranged in the container body (2), which is provided with a heat exchanger (5) and a guiding screen (8). A wort forced flow (10) provided with a pump is also provided, which runs through the boiler (4). In order to increase the efficiency of the device, the wort forced flow (10) has a thin-layer distributor (17) for the wort, which contains a pipe subsection (11 b) connected with the pump, which subsection leads above the guiding screen (8) via an outlet opening (13) with reduced outlet cross-section into the container body (2). Above the outlet opening (13), a flow-guiding baffle surface (15) is provided, at which the flow arrives from below, to deflect the liquid towards the wort reservoir (3).