Pumps – With condition responsive pumped fluid control – Plural separate sensing means for a single fluid controller
Patent
1994-08-12
1995-10-10
Bertsch, Richard A.
Pumps
With condition responsive pumped fluid control
Plural separate sensing means for a single fluid controller
417270, 417307, 417315, F04B 4900, F04B 1900, F04B 2708, F04B 126
Patent
active
054565812
ABSTRACT:
A multi-piston pump is provided which uses microprocessor controlled check all valves to control flow rate of a fluid at the pump's outlet port. The pump includes nine cylindrical shaped chambers and associated reciprocating pistons which are driven by a cam attached to a shaft. The pump's shaft is coupled to the shaft of a motor which, in turn, drives the pump's shaft and cam resulting in a fluid, such as seawater, filling each of the nine chambers and then having the fluid forced from the chamber by the movement of its associated piston from bottom dead center to top dead center. A pressure transducer which monitors the pressure at the pump's outlet port and a shaft encoder which monitors the angular position of the pump's shaft respectively provide analog signals indicative of the pump's outlet port's pressure and the shaft's angular position. A microprocessor receives these analog signals in a digital form, processes the signals and provides digital pulse signals to either extend or retract the rod of nine solenoids depending upon the pressure at the pump's outlet port. Each of the nine solenoid rods when extended engage a check ball valve within one of the pumps nine inlet passageways allowing the passageway to remain open when the associated reciprocating piston is in a pumping stroke. This allows seawater to be discharged through the inlet passageway maintaining fluid flow at the outlet port at a pressure level which is commensurate with the intended use of the pump.
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Jokela Gregory R.
Kruchowy Roman
Massey James
Bertsch Richard A.
Kalmbaugh David
Kim Ted
Sliwka Melvin
The United States of America as represented by the Secretary of
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