PUMP AND FLUID DISPLACER FOR A PUMP
Dossier Overview
Applicant
Graco Minnesota Inc.
Inventor
Bradley H. Hines; Brian W. Koehn; Jacob W. Meyer; Paul W. Scheierl; Thomas E. Armstrong; Jacob D. Higgins; David L. Fehr
IPC Classification
CPC Classification
An electrically operated displacement pump includes an electric motor having a stator and a rotor. The rotor is connected to the fluid displacer to drive axial reciprocation of the fluid displacer. A controller controls operation of the motor based on an operating state of the motor to control pumping by the displacement pump. The controller is configured to operate the pump in a priming mode. during priming of the pump, and a pumping mode, during pumping of process fluid. The controller causes the fluid displacer to move differently in the priming mode than in the pumping mode.
Original (Chinese)
An electrically operated displacement pump includes an electric motor having a stator and a rotor. The rotor is connected to the fluid displacer to drive axial reciprocation of the fluid displacer. A controller controls operation of the motor based on an operating state of the motor to control pumping by the displacement pump. The controller is configured to operate the pump in a priming mode. during priming of the pump, and a pumping mode, during pumping of process fluid. The controller causes the fluid displacer to move differently in the priming mode than in the pumping mode.
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