PISTON SYSTEMS HAVING A FLOW PATH BETWEEN PISTON CHAMBERS, PUMPS INCLUDING A FLOW PATH BETWEEN PISTON CHAMBERS, AND METHODS OF DRIVING PUMPS

摘要

Piston systems comprise a housing including a first piston chamber and a second piston chamber therein. A first piston is movably disposed within the first piston chamber and a second piston is movably disposed within the second piston chamber. A flow path extends between and couples the first piston chamber and the second piston chamber. Reciprocating pumps comprising a flow path between a plurality of piston chambers and methods of driving reciprocating pumps are also disclosed.