Patent ID: 6517330
Filing Date: 2003-02-11
Classification: F04B

Abstract:
A reciprocating pump comprising a chamber, a reciprocating member arranged to induct a fluid into the chamber and discharge the fluid from the chamber to a delivery side of the pump, and a piezoelectric element attached to the pump and arranged to detect pressure fluctuations on the delivery side of the pump so as to sense any abnormality in the inducting and discharging of fluid,wherein the chamber is defined by a cylinder portion of a main body, the cylinder portion has an induction port and a discharge port, the discharge port is opened or closed by a valve and when opened discharges the fluid to the discharge side, the reciprocating member is received for reciprocating movement in the chamber of the cylinder portion to thereby induct the fluid into the chamber through the induction port and discharge the fluid from the discharge port, and a solenoid drives the reciprocating member.