Multi-stage pump

Details Multi-stage pump Multi-stage pump

1977-05-19

1979-08-21

Croyle, Carlton R.

Pumps

Successive stages

Reciprocating rigid stages

417265, 417266, 417267, 417418, 417566, F04B 300, F04B 1704, F04B 2102

Patent

active

041652053

ABSTRACT:
A multi-stage pumping assembly comprising a plurality of pumping units arranged end to end in an elongate cylindrical housing. Each pumping unit comprises a solenoid which when energized causes a pumping piston to retract downwardly on its intake stroke, and when de-energized permits a tension loaded rubber sleeve element to pull the piston upwardly on its discharge stroke. Each of the solenoids is energized in sequence so that the pumping pistons move through their pumping cycles in a sequential pattern. In pumping against lower pressures, each piston is able to move through a longer path of travel on its discharge stroke to effect a higher volumetric flow of liquid. When working against higher head pressures, the pressure exerted by the several pumping pistons, working cumulatively effects a lower volumetric flow of fluid at a higher pressure.

REFERENCES:
patent: 1217195 (1917-02-01), McFerren
patent: 1366151 (1921-01-01), Aftrom
patent: 1615140 (1927-01-01), Rufdell
patent: 1844261 (1932-02-01), Penrod
patent: 2788170 (1957-04-01), Kats
patent: 3077162 (1963-02-01), Banerian
patent: 3514221 (1970-05-01), Hasguenoph et al.
patent: 3924165 (1975-12-01), Otto

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