Patent ID: 7314352

Claim:
An electric pump of inscribed-type comprising: a case in which a core being enwound by a coil is embedded; a permanent magnet formed in a cylindrical shape, having a central axis being identical to that of the core, and positioned so as to face an inner peripheral side of the core; an outer rotor fixed to an inner peripheral side of the permanent magnet; a rotor unit including the permanent magnet and the outer rotor; and an inner rotor having a central axis which is eccentric from a central axis of the core and the inner rotor engaged with the outer rotor so as to rotate in accordance with rotation of the outer rotor, thereby carrying out intake and exhaust of fluids, wherein the rotor unit includes a slide surface extending in an axial direction, the case includes a cylindrical projecting ring portion whose central axis is identical to that of the core and whose inner peripheral surface faces towards the central axis thereof, and the rotor unit contacts with and rotatably supported by the inner peripheral surface of the cylindrical projecting ring portion at the slide surface thereof.