Low power electromagnetic pump

摘要

An electromagnetic pump comprising an armature comprising a pole portion joined to a plunger portion, wherein the plunger portion comprises a one-piece structure including shaft portions of increasing diameters and a head portion comprising a diameter greater than the shaft portions, the plunger portion and a pole portion located internal to the pump housing for magnetic attraction by an electromagnet means. A retainer element is joined with the plunger portion and a main spring urges on the retainer element to move the plunger thus allowing for a return stoke of the plunger as the pump cycles. Guiding of the armature is performed exclusively by a cooperating relationship between the armature plunger portion and an adjacent portion at the pump housing.