Membrane and solenoid actuated valve for dispensing

摘要

The invention replaces mechanical actuation of the valve ( 22 ) in lubricant dispense meters ( 10 ) to provide a software driven method of controlling the dispense of fluids. The design utilizes either a pressure sensitive membrane switch or a multiple discrete position membrane switch ( 18 ) in conjunction with either a multiple discrete stage solenoid actuated valve, a proportional solenoid actuated valve or an on/off solenoid actuated valve ( 22 ) to provide operator or programmed control of lubricant dispense frequency and flow rate via the meter's microprocessor.