Electric pump

Claim 1

AN ELECTROMAGNETICALLY ACTUATED PUMP COMPRISING A HOUSING HAVING AN INLET AND AN OUTLET COAXIALLY ALIGNED THEREWITH, AN ENLARGED FLUID PASSAGEWAY BETWEEN SAID INLET AND SAID OUTLET, AN ARMATURE FORMED OF MAGNETIC MATERIAL POSITIONED IN THE FLUID PASSAGEWAY AND SPACED FROM THE PERIPHERAL WALLS THEREOF TO PROVIDE A PERIPHERAL CLEARANCE, PORT MEANS IN SAID ARMATURE COAXIALLY DISPOSED RELATIVE TO THE INLET AND THE OUTLET TO ACCOMMODATE FLUID FLOW PAST SAID ARMATURE, A FLEXIBLE IMPERFORATE SKIRT DISPOSED IN SAID PERIPHERAL CLEARANCE AND SEALING THE ARMATURE TO THE PERIPHERAL WALLS OF THE FLUID PASSAGEWAY, A FIRST ONE-WAY VALVE ON SAID ARMATURE TO PASS FLUID THROUGH SAID PORT MEANS OF SAID ARMATURE, A SECOND VALVE IN SAID HOUSING ARRANGED TO PASS FLUID ONLY IN THE SAME DIRECTION AS SAID FIRST VALVE, A SOLENOID IN SAID HOUSING DISPOSED BETWEEN SAID INLET AND OUTLET ADJACENT SAID ARMATURE, AND SPRING MEANS MOUNTING SAID ARMATURE FOR RECTILINEAR MOVEMENT ALONG THE AXIS OF SAID INLET AND OUTLET WITH THE PORT MEANS THEREOF IN COAXIAL ALIGNMENT WITH THE INLET AND OUTLET OF THE HOUSING, SAID SPRING MEANS BIASING SAID ARMATURE AWAY FROM SAID SOLENOID WHEREBY PULSED ENERGIZATION OF SAID SOLENOID CAUSES MOVEMENT OF SAID ARMATURE ASSEMBLY RECTILINEARLY RELATIVE TO THE AXIS OF SAID INLET AND OUTLET TO PUMP FLUID FROM SAID INLET TO SAID OUTLET.