Today in 1882, US Patent 264457 A was issued, an invention of George Hirschman, for his “Beer Faucet and Tap.” There’s no Abstract, although in the description it includes these claims:

My invention relates to devices for tapping barrels and casks; and it consists in a sleeve adapted to be screwed or otherwise attached to a metal bushing surrounding the plug or bung, and a shouldered faucet arranged to move a limited distance longitudinally within the sleeve, so that if forced back by the pressure of the liquid it can move only such limited distance, but is held in position to be driven to its place.