Patent ID: 9004881
Filing Date: 2015-04-14
Classification: F04B,Y10T

Abstract:
1. A fluid pump, comprising: a pump body including a first end body, a second end body, and a central body between the first end body and the second end body, the central body having a modular-receiving cavity therein; a modular insert secured within the modular-receiving cavity by an interference fit, the central body of the pump body and the modular insert together defining at least a portion of at least one fluid passageway extending around the modular insert at an interface between the modular insert and the pump body; a first fluid cavity and a second fluid cavity within the pump body; a first flexible member disposed within the first fluid cavity and defining a first subject fluid chamber and a first drive fluid chamber within the first fluid cavity; a second flexible member disposed within the second fluid cavity and defining a second subject fluid chamber and a second drive fluid chamber within the second fluid cavity; a drive shaft attached to each of the first flexible member and the second flexible member and extending through the modular insert, the drive shaft configured to slide back and forth through the modular insert; and at least one shift valve disposed within the modular insert and configured to move in response to movement of at least one of the first flexible member and the second flexible member.