ELECTROMAGNETIC PUMP Russian patent published in 2013 - IPC F04B17/04 

FIELD: engines and pumps.

SUBSTANCE: device may be used in production of pumps. Piston is arranged in cylinder to reciprocate therein and to separate pump first and second chambers, second one being communicated with driven entity. First two-position valve is arranged between pump first chamber and outer side. Second two-position valve is arranged in connection through channel communicating said first and second chambers. When piston is driven by electromagnetic force of electromagnetic section volume of first chamber decreases while that of second chamber increases. With piston driven back by spring first chamber volume increases while that of second chamber decreases. Piston face area taking up pressure is greater than that of piston rear face.

EFFECT: higher efficiency, decreased overall dimensions.

11 cl, 5 dwg