Patent ID: 9739274
Date: 2017-08-22
CPC Classifications: B01D,F04B,G05B,Y10T

Claim:
1. A pump that permits the replacement of an associated motor drive system, said pump comprising: a driving means disposed within a pump housing for driving a fluid in said pump; a motor drive system coupled to said driving means for activating said driving means; said motor drive system being releasably secured to said pump housing such that said motor drive system and said driving means coupled to said motor drive system can be quickly disconnected from said pump housing, removed as a single assembly and replaced with another motor drive system and another driving means coupled thereto; a pumping chamber for dispensing a process fluid, said pumping chamber comprising a diaphragm that separates said pumping chamber into first and second chambers, said first chamber being in fluid communication with said driving means through a first valve and comprising a pumping fluid, said second chamber comprising the process fluid therein received from a process fluid flow path; a pumping fluid reservoir for storing said pumping fluid therein, said pumping fluid reservoir being in fluid communication with said driving means through a second valve, and wherein said motor drive system is replaced when said first and second valves are alternately activated, said pump remaining on line by avoiding any interruption in said process fluid flow path during said motor drive system replacement; a process fluid reservoir coupled to said second chamber through a third valve to form said process fluid flow path; a fourth valve located between a second chamber outlet and a filter; and a pump controller, said pump controller controlling said first, second, third and fourth valves automatically.