STROKE ADJUSTMENT MECHANISM FOR RECIPROCATING PUMPS

摘要

A stroke adjustment mechanism having fewer parts that are easier to manufacture. In order to translate stroke adjustment into an eccentric offset of a rotating shaft to act as a rotating cam surface, the present invention utilizes two separate and identical plungers. The plungers are easier to manufacture as they do not require complex machining in mating parts. The present invention is also easier to assemble than prior designs. The present invention allows the drive gear to be produced with a simple round ID bore and also uses a one-piece, easy to machine round shaft. This provides for a simple and strong design.