ELECTROMAGNETICALLY DRIVEN RECIPROCATING PUMP WITH FLUTED PISTON.

摘要

A reciprocal type of pump or motor structure wherein a piston (21) has a linear function actuated by a pair of coils (30, 31) energized alternately and in the pump structure a check valve (39) in an outlet of the structure which stretches to open said outlet under the impact of expelled fluids and of its own volition retracts to the closed position immediately upon the cessation of fluids being expelled.