To suck and pressurize liquid like water and flow out linearly and press-feed in a long distance by providing a pump included a screw borne in the rotator of a motor in a pump main body.

A flange 2 is formed on both ends of a pump main body 1 so as to be connected to a pipe. The intermediate part of the metal cylinder body of the pump main body 1 is formed on a large calibre cylindrical part and an electromagnetic coil 6 is stored therein ans also water-proof bearings 7, 8 are arranged to both sides of the electromagnetic coil 6 by setting up in two steps. A screw type suction pressurized pump 9 is driven by this electromagnetic coil 6 and a fluid can be press-fed in a straight line shape. A carbon brush holder 11 is arranged between the electromagnetic coil 6 and the water- proof bearing 7 and the terminal of an electric wire connected thereto is covered by the cover 5 for an electric wire protection after giving the water-proof cap 3 and the electric wire pulled out to the outside is connected to a power source circuit.