Linear pump is based on alternating current (ac) motivation. The Linear-motor-driven Free Piston System has an internal piston inside the cylinder which is driven by an electro-magnet and spring system controlled by the alternating input current cycle.
The pumps extends from a flow of 18-26 l/min with 20-30Kpa positive and neagtive pressure.
A linear pump includes a housing having a bore and axially spaced apart inlet and outlet. A first check valve is joined to the housing for controlling flow of fluid through the bore. A piston is disposed coaxially in the housing bore for axial translation therein and includes a piston bore and axially spaced apart inlet and outlet. A second check valve is joined to the piston for controlling fluid flow through the piston bore. A linear motor includes a plurality of axially adjoining drive coils disposed in the housing, and a pair of axially spaced apart magnet rings disposed in the piston and spaced radially inwardly of the drive coils for magnetically cooperating therewith to axially oscillate the piston in the housing for cyclically pumping the fluid in turn through the housing and piston inlets and outlets in unidirectional flow through the housing and piston bores.
