Patent ID: 9103339
Filing Date: 2015-08-11
Classification: F04B

Abstract:
1. A piston pump comprising: a main body including an inlet, a first outlet, and a chamber formed therein, wherein the inlet, the first outlet, and at least a portion of the chamber are fluidly connected to form at least a portion of a first fluid flow path for receiving a flow of fluid therein; a piston disposed in the chamber and configured to reciprocatingly move therein; an adjustment element at least partially disposed in the main body, the adjustment element configured to adjust an effective flow of the fluid through the first fluid flow path, wherein the adjustment element includes a plunger displaceable relative to the piston; and a second fluid flow path providing fluid communication between the chamber and a point upstream of the inlet of the main body, wherein the piston selectively abuts an end of the plunger to impede a flow of fluid through the second fluid flow path.