ELECTRIC DOUBLE-CYLINDER PISTON PUMP

摘要

PROBLEM TO BE SOLVED: To prevent or restrain backflow during switching a supply/exhausting port as much as possible.;SOLUTION: The electric double-cylinder piston pump comprises: a hopper 1 provided with a transport pipe 3 and two supply/discharge ports 11, 21; an oscillation pipe 2 housed in the hopper 1 and alternately communicating the transport pipe 3 with the supply/discharge ports 11, 21; an electric actuator 5 for oscillating the oscillation pipe 2 to a position for alternately communicating with the supply/discharge ports 11, 21; two right and left piston cylinders 10, 20 respectively connected to the two supply/discharge ports 11, 21, sucking pressure-fed fluid in the hopper 1 when not communicated with the oscillation pipe 2, and emitting the sucked pressure-fed fluid when communicated with the oscillation pipe 2; plural ball spring devices 15, 25 provided coaxially with axial lines CL1, CL2 so that the respective piston cylinders 10, 20 can be driven; and slotless motors 19, 29 provided coaxially with the axial lines CL1, CL2 and driving the respective ball spring devices 15, 25.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT