Today in 1890, US Patent 434430 A was issued, an invention of Joseph J. Danks, for his “Keg and Barrel Washing Machine.” There’s no Abstract, although in the description it includes these claims:

The object of my invention is to produce a keg and barrel washing machine which will be simpler of construction, more convenient to use, less expensive, and more durable than similar previous machines. A machine similar to this is shown and described in Patent N 0. 330,550, for a keg-washing machine, dated November 17, 1885, and granted to H. Binder.

That machine has two independent support ing-frames with a keg-holder supported by-one frame and a valve supported by the other, with their respective axes parallel and an operative mechanical connection between them, consisting of gearing or its equivalent. The principle of construction of that machine requires such a mechanical connection between the keg holder and the valve, and also is limited in operation to an oscillating turning motion. The Valve part or plug has two side openings near each other, which, with the oscillating motion necessary, causes uneven wear on one side of the valve-plug and in time causes the valve to leak, when the machine must be repaired, and since such machines are worked continuously such wear results soon and is objectionable.

In order to attain the objects above mentioned, I have devised my machine so that the axis of the valve and that of the keg holder may coincide, and so that the valve plug and holder may be rigidly connected together, and hence no operative mechanical connection be required between the valve and keg-holder, thus having a simple and inexpensive arrangement with a single frame. Further, I make but one side opening in the valve plug and am enabled to rotate the keg holder and valve in either direction continuously, thus avoiding undue wear of the parts.