Magnetic Reciprocating Fluid Device

摘要

A high-efficiency magnetic reciprocating fluid device is provided. Magnetic pole members 10 and 12 having respective induction coils 16 and 18 fitted thereon are opposed to each other at the opposite sides of a magnetic armature 56 connected to one end of a piston that reciprocates in a cylinder. The magnetic armature 56 has an outer peripheral surface comprising arcuate side surfaces 56a designed to face mutually opposing surfaces 10a and 12a of the magnetic pole members 10 and 12 and plane surfaces 56b extending between the side surfaces 56a. Provision of the plane surfaces 56b makes it possible to increase the spacing between the side surfaces 56a, which face the magnetic pole members, without increasing the weight of the armature in comparison to a circular columnar magnetic armature and hence possible to increase the spacing between the magnetic pole members. Accordingly, induction coils reduced in copper loss by increasing the amount of copper used therefor can be fitted onto the magnetic pole members.