Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL94680CpublicationCriticalpatent/NL94680C/xx
F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
F04B53/14—Pistons, piston-rods or piston-rod connections
F04B53/148—Pistons, piston-rods or piston-rod connections the piston being provided with channels which are coacting with the cylinder and are used as a distribution member for another piston-cylinder unit