Today in 1899, US Patent 637826 A was issued, an invention of Frank Preston, for his “Combined Corkscrew and Valve for Beer Pumps.” There’s no Abstract, although in the description it includes these claims:

The invention relates to a combined corkscrew and valve for beer-pumps.

The object of the present invention is to improve the construction of beer-pumps and to provide a simple, inexpensive, and efficient device designed more especially for use at picnics and for private use and adapted to serve as a corkscrew and capable of enabling the proper pressure to be maintained on a keg or other receptacle of beer or other liquid to maintain the same in a fresh condition until it is entirely consumed.

A further object of the invention is to provide a device of this character adapted to be readily carried in the pocket and capable of being quickly applied to a receptacle.